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4091 lines
136 KiB
4091 lines
136 KiB
/* |
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* various utility functions for use within FFmpeg |
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* Copyright (c) 2000, 2001, 2002 Fabrice Bellard |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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/* #define DEBUG */ |
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|
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "internal.h" |
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#include "libavcodec/internal.h" |
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#include "libavcodec/raw.h" |
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#include "libavcodec/bytestream.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/dict.h" |
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#include "libavutil/pixdesc.h" |
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#include "metadata.h" |
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#include "id3v2.h" |
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#include "libavutil/avassert.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/parseutils.h" |
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#include "libavutil/time.h" |
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#include "libavutil/timestamp.h" |
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#include "riff.h" |
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#include "audiointerleave.h" |
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#include "url.h" |
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#include <stdarg.h> |
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#if CONFIG_NETWORK |
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#include "network.h" |
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#endif |
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|
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#undef NDEBUG |
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#include <assert.h> |
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|
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/** |
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* @file |
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* various utility functions for use within FFmpeg |
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*/ |
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|
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unsigned avformat_version(void) |
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{ |
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av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100); |
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return LIBAVFORMAT_VERSION_INT; |
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} |
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|
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const char *avformat_configuration(void) |
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{ |
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return FFMPEG_CONFIGURATION; |
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} |
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|
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const char *avformat_license(void) |
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{ |
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#define LICENSE_PREFIX "libavformat license: " |
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return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
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} |
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|
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#define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48)) |
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|
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static int is_relative(int64_t ts) { |
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return ts > (RELATIVE_TS_BASE - (1LL<<48)); |
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} |
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|
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/** head of registered input format linked list */ |
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static AVInputFormat *first_iformat = NULL; |
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/** head of registered output format linked list */ |
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static AVOutputFormat *first_oformat = NULL; |
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|
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AVInputFormat *av_iformat_next(AVInputFormat *f) |
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{ |
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if(f) return f->next; |
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else return first_iformat; |
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} |
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|
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AVOutputFormat *av_oformat_next(AVOutputFormat *f) |
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{ |
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if(f) return f->next; |
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else return first_oformat; |
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} |
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|
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void av_register_input_format(AVInputFormat *format) |
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{ |
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AVInputFormat **p; |
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p = &first_iformat; |
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while (*p != NULL) p = &(*p)->next; |
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*p = format; |
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format->next = NULL; |
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} |
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|
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void av_register_output_format(AVOutputFormat *format) |
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{ |
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AVOutputFormat **p; |
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p = &first_oformat; |
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while (*p != NULL) p = &(*p)->next; |
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*p = format; |
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format->next = NULL; |
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} |
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|
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int av_match_ext(const char *filename, const char *extensions) |
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{ |
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const char *ext, *p; |
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char ext1[32], *q; |
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|
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if(!filename) |
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return 0; |
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|
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ext = strrchr(filename, '.'); |
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if (ext) { |
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ext++; |
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p = extensions; |
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for(;;) { |
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q = ext1; |
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while (*p != '\0' && *p != ',' && q-ext1<sizeof(ext1)-1) |
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*q++ = *p++; |
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*q = '\0'; |
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if (!av_strcasecmp(ext1, ext)) |
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return 1; |
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if (*p == '\0') |
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break; |
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p++; |
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} |
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} |
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return 0; |
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} |
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|
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static int match_format(const char *name, const char *names) |
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{ |
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const char *p; |
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int len, namelen; |
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|
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if (!name || !names) |
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return 0; |
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namelen = strlen(name); |
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while ((p = strchr(names, ','))) { |
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len = FFMAX(p - names, namelen); |
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if (!av_strncasecmp(name, names, len)) |
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return 1; |
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names = p+1; |
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} |
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return !av_strcasecmp(name, names); |
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} |
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|
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AVOutputFormat *av_guess_format(const char *short_name, const char *filename, |
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const char *mime_type) |
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{ |
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AVOutputFormat *fmt = NULL, *fmt_found; |
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int score_max, score; |
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|
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/* specific test for image sequences */ |
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#if CONFIG_IMAGE2_MUXER |
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if (!short_name && filename && |
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av_filename_number_test(filename) && |
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ff_guess_image2_codec(filename) != AV_CODEC_ID_NONE) { |
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return av_guess_format("image2", NULL, NULL); |
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} |
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#endif |
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/* Find the proper file type. */ |
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fmt_found = NULL; |
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score_max = 0; |
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while ((fmt = av_oformat_next(fmt))) { |
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score = 0; |
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if (fmt->name && short_name && match_format(short_name, fmt->name)) |
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score += 100; |
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if (fmt->mime_type && mime_type && !strcmp(fmt->mime_type, mime_type)) |
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score += 10; |
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if (filename && fmt->extensions && |
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av_match_ext(filename, fmt->extensions)) { |
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score += 5; |
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} |
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if (score > score_max) { |
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score_max = score; |
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fmt_found = fmt; |
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} |
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} |
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return fmt_found; |
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} |
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|
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enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name, |
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const char *filename, const char *mime_type, enum AVMediaType type){ |
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if(type == AVMEDIA_TYPE_VIDEO){ |
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enum AVCodecID codec_id= AV_CODEC_ID_NONE; |
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|
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#if CONFIG_IMAGE2_MUXER |
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if(!strcmp(fmt->name, "image2") || !strcmp(fmt->name, "image2pipe")){ |
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codec_id= ff_guess_image2_codec(filename); |
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} |
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#endif |
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if(codec_id == AV_CODEC_ID_NONE) |
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codec_id= fmt->video_codec; |
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return codec_id; |
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}else if(type == AVMEDIA_TYPE_AUDIO) |
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return fmt->audio_codec; |
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else if (type == AVMEDIA_TYPE_SUBTITLE) |
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return fmt->subtitle_codec; |
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else |
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return AV_CODEC_ID_NONE; |
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} |
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|
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AVInputFormat *av_find_input_format(const char *short_name) |
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{ |
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AVInputFormat *fmt = NULL; |
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while ((fmt = av_iformat_next(fmt))) { |
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if (match_format(short_name, fmt->name)) |
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return fmt; |
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} |
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return NULL; |
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} |
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|
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int ffio_limit(AVIOContext *s, int size) |
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{ |
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if(s->maxsize>=0){ |
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int64_t remaining= s->maxsize - avio_tell(s); |
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if(remaining < size){ |
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int64_t newsize= avio_size(s); |
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if(!s->maxsize || s->maxsize<newsize) |
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s->maxsize= newsize - !newsize; |
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remaining= s->maxsize - avio_tell(s); |
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remaining= FFMAX(remaining, 0); |
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} |
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|
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if(s->maxsize>=0 && remaining+1 < size){ |
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av_log(0, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1); |
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size= remaining+1; |
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} |
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} |
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return size; |
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} |
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|
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int av_get_packet(AVIOContext *s, AVPacket *pkt, int size) |
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{ |
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int ret; |
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int orig_size = size; |
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size= ffio_limit(s, size); |
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ret= av_new_packet(pkt, size); |
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if(ret<0) |
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return ret; |
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pkt->pos= avio_tell(s); |
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ret= avio_read(s, pkt->data, size); |
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if(ret<=0) |
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av_free_packet(pkt); |
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else |
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av_shrink_packet(pkt, ret); |
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if (pkt->size < orig_size) |
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pkt->flags |= AV_PKT_FLAG_CORRUPT; |
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|
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return ret; |
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} |
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|
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int av_append_packet(AVIOContext *s, AVPacket *pkt, int size) |
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{ |
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int ret; |
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int old_size; |
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if (!pkt->size) |
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return av_get_packet(s, pkt, size); |
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old_size = pkt->size; |
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ret = av_grow_packet(pkt, size); |
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if (ret < 0) |
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return ret; |
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ret = avio_read(s, pkt->data + old_size, size); |
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av_shrink_packet(pkt, old_size + FFMAX(ret, 0)); |
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return ret; |
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} |
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int av_filename_number_test(const char *filename) |
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{ |
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char buf[1024]; |
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return filename && (av_get_frame_filename(buf, sizeof(buf), filename, 1)>=0); |
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} |
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|
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AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened, int *score_ret) |
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{ |
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AVProbeData lpd = *pd; |
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AVInputFormat *fmt1 = NULL, *fmt; |
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int score, nodat = 0, score_max=0; |
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|
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if (lpd.buf_size > 10 && ff_id3v2_match(lpd.buf, ID3v2_DEFAULT_MAGIC)) { |
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int id3len = ff_id3v2_tag_len(lpd.buf); |
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if (lpd.buf_size > id3len + 16) { |
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lpd.buf += id3len; |
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lpd.buf_size -= id3len; |
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}else |
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nodat = 1; |
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} |
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fmt = NULL; |
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while ((fmt1 = av_iformat_next(fmt1))) { |
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if (!is_opened == !(fmt1->flags & AVFMT_NOFILE)) |
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continue; |
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score = 0; |
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if (fmt1->read_probe) { |
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score = fmt1->read_probe(&lpd); |
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if(fmt1->extensions && av_match_ext(lpd.filename, fmt1->extensions)) |
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score = FFMAX(score, nodat ? AVPROBE_SCORE_MAX/4-1 : 1); |
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} else if (fmt1->extensions) { |
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if (av_match_ext(lpd.filename, fmt1->extensions)) { |
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score = 50; |
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} |
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} |
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if (score > score_max) { |
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score_max = score; |
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fmt = fmt1; |
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}else if (score == score_max) |
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fmt = NULL; |
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} |
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*score_ret= score_max; |
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|
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return fmt; |
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} |
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AVInputFormat *av_probe_input_format2(AVProbeData *pd, int is_opened, int *score_max) |
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{ |
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int score_ret; |
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AVInputFormat *fmt= av_probe_input_format3(pd, is_opened, &score_ret); |
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if(score_ret > *score_max){ |
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*score_max= score_ret; |
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return fmt; |
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}else |
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return NULL; |
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} |
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|
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AVInputFormat *av_probe_input_format(AVProbeData *pd, int is_opened){ |
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int score=0; |
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return av_probe_input_format2(pd, is_opened, &score); |
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} |
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|
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static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, AVProbeData *pd) |
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{ |
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static const struct { |
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const char *name; enum AVCodecID id; enum AVMediaType type; |
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} fmt_id_type[] = { |
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{ "aac" , AV_CODEC_ID_AAC , AVMEDIA_TYPE_AUDIO }, |
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{ "ac3" , AV_CODEC_ID_AC3 , AVMEDIA_TYPE_AUDIO }, |
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{ "dts" , AV_CODEC_ID_DTS , AVMEDIA_TYPE_AUDIO }, |
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{ "eac3" , AV_CODEC_ID_EAC3 , AVMEDIA_TYPE_AUDIO }, |
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{ "h264" , AV_CODEC_ID_H264 , AVMEDIA_TYPE_VIDEO }, |
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{ "loas" , AV_CODEC_ID_AAC_LATM , AVMEDIA_TYPE_AUDIO }, |
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{ "m4v" , AV_CODEC_ID_MPEG4 , AVMEDIA_TYPE_VIDEO }, |
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{ "mp3" , AV_CODEC_ID_MP3 , AVMEDIA_TYPE_AUDIO }, |
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{ "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO }, |
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{ 0 } |
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}; |
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int score; |
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AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score); |
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|
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if (fmt && st->request_probe <= score) { |
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int i; |
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av_log(s, AV_LOG_DEBUG, "Probe with size=%d, packets=%d detected %s with score=%d\n", |
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pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, fmt->name, score); |
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for (i = 0; fmt_id_type[i].name; i++) { |
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if (!strcmp(fmt->name, fmt_id_type[i].name)) { |
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st->codec->codec_id = fmt_id_type[i].id; |
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st->codec->codec_type = fmt_id_type[i].type; |
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break; |
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} |
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} |
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} |
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return score; |
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} |
|
|
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/************************************************************/ |
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/* input media file */ |
|
|
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int av_demuxer_open(AVFormatContext *ic){ |
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int err; |
|
|
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if (ic->iformat->read_header) { |
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err = ic->iformat->read_header(ic); |
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if (err < 0) |
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return err; |
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} |
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|
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if (ic->pb && !ic->data_offset) |
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ic->data_offset = avio_tell(ic->pb); |
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|
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return 0; |
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} |
|
|
|
|
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/** size of probe buffer, for guessing file type from file contents */ |
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#define PROBE_BUF_MIN 2048 |
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#define PROBE_BUF_MAX (1<<20) |
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|
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int av_probe_input_buffer(AVIOContext *pb, AVInputFormat **fmt, |
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const char *filename, void *logctx, |
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unsigned int offset, unsigned int max_probe_size) |
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{ |
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AVProbeData pd = { filename ? filename : "", NULL, -offset }; |
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unsigned char *buf = NULL; |
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int ret = 0, probe_size; |
|
|
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if (!max_probe_size) { |
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max_probe_size = PROBE_BUF_MAX; |
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} else if (max_probe_size > PROBE_BUF_MAX) { |
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max_probe_size = PROBE_BUF_MAX; |
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} else if (max_probe_size < PROBE_BUF_MIN) { |
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return AVERROR(EINVAL); |
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} |
|
|
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if (offset >= max_probe_size) { |
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return AVERROR(EINVAL); |
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} |
|
|
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for(probe_size= PROBE_BUF_MIN; probe_size<=max_probe_size && !*fmt; |
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probe_size = FFMIN(probe_size<<1, FFMAX(max_probe_size, probe_size+1))) { |
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int score = probe_size < max_probe_size ? AVPROBE_SCORE_RETRY : 0; |
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int buf_offset = (probe_size == PROBE_BUF_MIN) ? 0 : probe_size>>1; |
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void *buftmp; |
|
|
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if (probe_size < offset) { |
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continue; |
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} |
|
|
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/* read probe data */ |
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buftmp = av_realloc(buf, probe_size + AVPROBE_PADDING_SIZE); |
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if(!buftmp){ |
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av_free(buf); |
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return AVERROR(ENOMEM); |
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} |
|
buf=buftmp; |
|
if ((ret = avio_read(pb, buf + buf_offset, probe_size - buf_offset)) < 0) { |
|
/* fail if error was not end of file, otherwise, lower score */ |
|
if (ret != AVERROR_EOF) { |
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av_free(buf); |
|
return ret; |
|
} |
|
score = 0; |
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ret = 0; /* error was end of file, nothing read */ |
|
} |
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pd.buf_size += ret; |
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pd.buf = &buf[offset]; |
|
|
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memset(pd.buf + pd.buf_size, 0, AVPROBE_PADDING_SIZE); |
|
|
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/* guess file format */ |
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*fmt = av_probe_input_format2(&pd, 1, &score); |
|
if(*fmt){ |
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if(score <= AVPROBE_SCORE_RETRY){ //this can only be true in the last iteration |
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av_log(logctx, AV_LOG_WARNING, "Format %s detected only with low score of %d, misdetection possible!\n", (*fmt)->name, score); |
|
}else |
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av_log(logctx, AV_LOG_DEBUG, "Format %s probed with size=%d and score=%d\n", (*fmt)->name, probe_size, score); |
|
} |
|
} |
|
|
|
if (!*fmt) { |
|
av_free(buf); |
|
return AVERROR_INVALIDDATA; |
|
} |
|
|
|
/* rewind. reuse probe buffer to avoid seeking */ |
|
ret = ffio_rewind_with_probe_data(pb, &buf, pd.buf_size); |
|
|
|
return ret; |
|
} |
|
|
|
/* open input file and probe the format if necessary */ |
|
static int init_input(AVFormatContext *s, const char *filename, AVDictionary **options) |
|
{ |
|
int ret; |
|
AVProbeData pd = {filename, NULL, 0}; |
|
int score = AVPROBE_SCORE_RETRY; |
|
|
|
if (s->pb) { |
|
s->flags |= AVFMT_FLAG_CUSTOM_IO; |
|
if (!s->iformat) |
|
return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize); |
|
else if (s->iformat->flags & AVFMT_NOFILE) |
|
av_log(s, AV_LOG_WARNING, "Custom AVIOContext makes no sense and " |
|
"will be ignored with AVFMT_NOFILE format.\n"); |
|
return 0; |
|
} |
|
|
|
if ( (s->iformat && s->iformat->flags & AVFMT_NOFILE) || |
|
(!s->iformat && (s->iformat = av_probe_input_format2(&pd, 0, &score)))) |
|
return 0; |
|
|
|
if ((ret = avio_open2(&s->pb, filename, AVIO_FLAG_READ | s->avio_flags, |
|
&s->interrupt_callback, options)) < 0) |
|
return ret; |
|
if (s->iformat) |
|
return 0; |
|
return av_probe_input_buffer(s->pb, &s->iformat, filename, s, 0, s->probesize); |
|
} |
|
|
|
static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt, |
|
AVPacketList **plast_pktl){ |
|
AVPacketList *pktl = av_mallocz(sizeof(AVPacketList)); |
|
if (!pktl) |
|
return NULL; |
|
|
|
if (*packet_buffer) |
|
(*plast_pktl)->next = pktl; |
|
else |
|
*packet_buffer = pktl; |
|
|
|
/* add the packet in the buffered packet list */ |
|
*plast_pktl = pktl; |
|
pktl->pkt= *pkt; |
|
return &pktl->pkt; |
|
} |
|
|
|
void avformat_queue_attached_pictures(AVFormatContext *s) |
|
{ |
|
int i; |
|
for (i = 0; i < s->nb_streams; i++) |
|
if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC && |
|
s->streams[i]->discard < AVDISCARD_ALL) { |
|
AVPacket copy = s->streams[i]->attached_pic; |
|
copy.destruct = NULL; |
|
add_to_pktbuf(&s->raw_packet_buffer, ©, &s->raw_packet_buffer_end); |
|
} |
|
} |
|
|
|
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options) |
|
{ |
|
AVFormatContext *s = *ps; |
|
int ret = 0; |
|
AVDictionary *tmp = NULL; |
|
ID3v2ExtraMeta *id3v2_extra_meta = NULL; |
|
|
|
if (!s && !(s = avformat_alloc_context())) |
|
return AVERROR(ENOMEM); |
|
if (!s->av_class){ |
|
av_log(0, AV_LOG_ERROR, "Input context has not been properly allocated by avformat_alloc_context() and is not NULL either\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
if (fmt) |
|
s->iformat = fmt; |
|
|
|
if (options) |
|
av_dict_copy(&tmp, *options, 0); |
|
|
|
if ((ret = av_opt_set_dict(s, &tmp)) < 0) |
|
goto fail; |
|
|
|
if ((ret = init_input(s, filename, &tmp)) < 0) |
|
goto fail; |
|
|
|
/* check filename in case an image number is expected */ |
|
if (s->iformat->flags & AVFMT_NEEDNUMBER) { |
|
if (!av_filename_number_test(filename)) { |
|
ret = AVERROR(EINVAL); |
|
goto fail; |
|
} |
|
} |
|
|
|
s->duration = s->start_time = AV_NOPTS_VALUE; |
|
av_strlcpy(s->filename, filename ? filename : "", sizeof(s->filename)); |
|
|
|
/* allocate private data */ |
|
if (s->iformat->priv_data_size > 0) { |
|
if (!(s->priv_data = av_mallocz(s->iformat->priv_data_size))) { |
|
ret = AVERROR(ENOMEM); |
|
goto fail; |
|
} |
|
if (s->iformat->priv_class) { |
|
*(const AVClass**)s->priv_data = s->iformat->priv_class; |
|
av_opt_set_defaults(s->priv_data); |
|
if ((ret = av_opt_set_dict(s->priv_data, &tmp)) < 0) |
|
goto fail; |
|
} |
|
} |
|
|
|
/* e.g. AVFMT_NOFILE formats will not have a AVIOContext */ |
|
if (s->pb) |
|
ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta); |
|
|
|
if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->iformat->read_header) |
|
if ((ret = s->iformat->read_header(s)) < 0) |
|
goto fail; |
|
|
|
if (id3v2_extra_meta) { |
|
if (!strcmp(s->iformat->name, "mp3")) { |
|
if((ret = ff_id3v2_parse_apic(s, &id3v2_extra_meta)) < 0) |
|
goto fail; |
|
} else |
|
av_log(s, AV_LOG_DEBUG, "demuxer does not support additional id3 data, skipping\n"); |
|
} |
|
ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
|
|
|
avformat_queue_attached_pictures(s); |
|
|
|
if (!(s->flags&AVFMT_FLAG_PRIV_OPT) && s->pb && !s->data_offset) |
|
s->data_offset = avio_tell(s->pb); |
|
|
|
s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
|
|
|
if (options) { |
|
av_dict_free(options); |
|
*options = tmp; |
|
} |
|
*ps = s; |
|
return 0; |
|
|
|
fail: |
|
ff_id3v2_free_extra_meta(&id3v2_extra_meta); |
|
av_dict_free(&tmp); |
|
if (s->pb && !(s->flags & AVFMT_FLAG_CUSTOM_IO)) |
|
avio_close(s->pb); |
|
avformat_free_context(s); |
|
*ps = NULL; |
|
return ret; |
|
} |
|
|
|
/*******************************************************/ |
|
|
|
static void probe_codec(AVFormatContext *s, AVStream *st, const AVPacket *pkt) |
|
{ |
|
if(st->request_probe>0){ |
|
AVProbeData *pd = &st->probe_data; |
|
int end; |
|
av_log(s, AV_LOG_DEBUG, "probing stream %d pp:%d\n", st->index, st->probe_packets); |
|
--st->probe_packets; |
|
|
|
if (pkt) { |
|
uint8_t *new_buf = av_realloc(pd->buf, pd->buf_size+pkt->size+AVPROBE_PADDING_SIZE); |
|
if(!new_buf) |
|
goto no_packet; |
|
pd->buf = new_buf; |
|
memcpy(pd->buf+pd->buf_size, pkt->data, pkt->size); |
|
pd->buf_size += pkt->size; |
|
memset(pd->buf+pd->buf_size, 0, AVPROBE_PADDING_SIZE); |
|
} else { |
|
no_packet: |
|
st->probe_packets = 0; |
|
if (!pd->buf_size) { |
|
av_log(s, AV_LOG_WARNING, "nothing to probe for stream %d\n", |
|
st->index); |
|
} |
|
} |
|
|
|
end= s->raw_packet_buffer_remaining_size <= 0 |
|
|| st->probe_packets<=0; |
|
|
|
if(end || av_log2(pd->buf_size) != av_log2(pd->buf_size - pkt->size)){ |
|
int score= set_codec_from_probe_data(s, st, pd); |
|
if( (st->codec->codec_id != AV_CODEC_ID_NONE && score > AVPROBE_SCORE_RETRY) |
|
|| end){ |
|
pd->buf_size=0; |
|
av_freep(&pd->buf); |
|
st->request_probe= -1; |
|
if(st->codec->codec_id != AV_CODEC_ID_NONE){ |
|
av_log(s, AV_LOG_DEBUG, "probed stream %d\n", st->index); |
|
}else |
|
av_log(s, AV_LOG_WARNING, "probed stream %d failed\n", st->index); |
|
} |
|
} |
|
} |
|
} |
|
|
|
static void force_codec_ids(AVFormatContext *s, AVStream *st) |
|
{ |
|
switch(st->codec->codec_type){ |
|
case AVMEDIA_TYPE_VIDEO: |
|
if(s->video_codec_id) st->codec->codec_id= s->video_codec_id; |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
if(s->audio_codec_id) st->codec->codec_id= s->audio_codec_id; |
|
break; |
|
case AVMEDIA_TYPE_SUBTITLE: |
|
if(s->subtitle_codec_id)st->codec->codec_id= s->subtitle_codec_id; |
|
break; |
|
} |
|
} |
|
|
|
int ff_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
int ret, i; |
|
AVStream *st; |
|
|
|
for(;;){ |
|
AVPacketList *pktl = s->raw_packet_buffer; |
|
|
|
if (pktl) { |
|
*pkt = pktl->pkt; |
|
st = s->streams[pkt->stream_index]; |
|
if(st->request_probe <= 0){ |
|
s->raw_packet_buffer = pktl->next; |
|
s->raw_packet_buffer_remaining_size += pkt->size; |
|
av_free(pktl); |
|
return 0; |
|
} |
|
} |
|
|
|
pkt->data = NULL; |
|
pkt->size = 0; |
|
av_init_packet(pkt); |
|
ret= s->iformat->read_packet(s, pkt); |
|
if (ret < 0) { |
|
if (!pktl || ret == AVERROR(EAGAIN)) |
|
return ret; |
|
for (i = 0; i < s->nb_streams; i++) { |
|
st = s->streams[i]; |
|
if (st->probe_packets) { |
|
probe_codec(s, st, NULL); |
|
} |
|
av_assert0(st->request_probe <= 0); |
|
} |
|
continue; |
|
} |
|
|
|
if ((s->flags & AVFMT_FLAG_DISCARD_CORRUPT) && |
|
(pkt->flags & AV_PKT_FLAG_CORRUPT)) { |
|
av_log(s, AV_LOG_WARNING, |
|
"Dropped corrupted packet (stream = %d)\n", |
|
pkt->stream_index); |
|
av_free_packet(pkt); |
|
continue; |
|
} |
|
|
|
if(!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA)) |
|
av_packet_merge_side_data(pkt); |
|
|
|
if(pkt->stream_index >= (unsigned)s->nb_streams){ |
|
av_log(s, AV_LOG_ERROR, "Invalid stream index %d\n", pkt->stream_index); |
|
continue; |
|
} |
|
|
|
st= s->streams[pkt->stream_index]; |
|
|
|
force_codec_ids(s, st); |
|
|
|
/* TODO: audio: time filter; video: frame reordering (pts != dts) */ |
|
if (s->use_wallclock_as_timestamps) |
|
pkt->dts = pkt->pts = av_rescale_q(av_gettime(), AV_TIME_BASE_Q, st->time_base); |
|
|
|
if(!pktl && st->request_probe <= 0) |
|
return ret; |
|
|
|
add_to_pktbuf(&s->raw_packet_buffer, pkt, &s->raw_packet_buffer_end); |
|
s->raw_packet_buffer_remaining_size -= pkt->size; |
|
|
|
probe_codec(s, st, pkt); |
|
} |
|
} |
|
|
|
#if FF_API_READ_PACKET |
|
int av_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
return ff_read_packet(s, pkt); |
|
} |
|
#endif |
|
|
|
|
|
/**********************************************************/ |
|
|
|
static int determinable_frame_size(AVCodecContext *avctx) |
|
{ |
|
if (/*avctx->codec_id == AV_CODEC_ID_AAC ||*/ |
|
avctx->codec_id == AV_CODEC_ID_MP1 || |
|
avctx->codec_id == AV_CODEC_ID_MP2 || |
|
avctx->codec_id == AV_CODEC_ID_MP3/* || |
|
avctx->codec_id == AV_CODEC_ID_CELT*/) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/** |
|
* Get the number of samples of an audio frame. Return -1 on error. |
|
*/ |
|
int ff_get_audio_frame_size(AVCodecContext *enc, int size, int mux) |
|
{ |
|
int frame_size; |
|
|
|
/* give frame_size priority if demuxing */ |
|
if (!mux && enc->frame_size > 1) |
|
return enc->frame_size; |
|
|
|
if ((frame_size = av_get_audio_frame_duration(enc, size)) > 0) |
|
return frame_size; |
|
|
|
/* fallback to using frame_size if muxing */ |
|
if (enc->frame_size > 1) |
|
return enc->frame_size; |
|
|
|
return -1; |
|
} |
|
|
|
|
|
/** |
|
* Return the frame duration in seconds. Return 0 if not available. |
|
*/ |
|
void ff_compute_frame_duration(int *pnum, int *pden, AVStream *st, |
|
AVCodecParserContext *pc, AVPacket *pkt) |
|
{ |
|
int frame_size; |
|
|
|
*pnum = 0; |
|
*pden = 0; |
|
switch(st->codec->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
if (st->r_frame_rate.num && !pc) { |
|
*pnum = st->r_frame_rate.den; |
|
*pden = st->r_frame_rate.num; |
|
} else if(st->time_base.num*1000LL > st->time_base.den) { |
|
*pnum = st->time_base.num; |
|
*pden = st->time_base.den; |
|
}else if(st->codec->time_base.num*1000LL > st->codec->time_base.den){ |
|
*pnum = st->codec->time_base.num; |
|
*pden = st->codec->time_base.den; |
|
if (pc && pc->repeat_pict) { |
|
*pnum = (*pnum) * (1 + pc->repeat_pict); |
|
} |
|
//If this codec can be interlaced or progressive then we need a parser to compute duration of a packet |
|
//Thus if we have no parser in such case leave duration undefined. |
|
if(st->codec->ticks_per_frame>1 && !pc){ |
|
*pnum = *pden = 0; |
|
} |
|
} |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
frame_size = ff_get_audio_frame_size(st->codec, pkt->size, 0); |
|
if (frame_size <= 0 || st->codec->sample_rate <= 0) |
|
break; |
|
*pnum = frame_size; |
|
*pden = st->codec->sample_rate; |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
static int is_intra_only(AVCodecContext *enc){ |
|
const AVCodecDescriptor *desc; |
|
|
|
if(enc->codec_type != AVMEDIA_TYPE_VIDEO) |
|
return 1; |
|
|
|
desc = av_codec_get_codec_descriptor(enc); |
|
if (!desc) { |
|
desc = avcodec_descriptor_get(enc->codec_id); |
|
av_codec_set_codec_descriptor(enc, desc); |
|
} |
|
if (desc) |
|
return !!(desc->props & AV_CODEC_PROP_INTRA_ONLY); |
|
return 0; |
|
} |
|
|
|
static int has_decode_delay_been_guessed(AVStream *st) |
|
{ |
|
if(st->codec->codec_id != AV_CODEC_ID_H264) return 1; |
|
if(!st->info) // if we have left find_stream_info then nb_decoded_frames wont increase anymore for stream copy |
|
return 1; |
|
#if CONFIG_H264_DECODER |
|
if(st->codec->has_b_frames && |
|
avpriv_h264_has_num_reorder_frames(st->codec) == st->codec->has_b_frames) |
|
return 1; |
|
#endif |
|
if(st->codec->has_b_frames<3) |
|
return st->nb_decoded_frames >= 7; |
|
else if(st->codec->has_b_frames<4) |
|
return st->nb_decoded_frames >= 18; |
|
else |
|
return st->nb_decoded_frames >= 20; |
|
} |
|
|
|
static AVPacketList *get_next_pkt(AVFormatContext *s, AVStream *st, AVPacketList *pktl) |
|
{ |
|
if (pktl->next) |
|
return pktl->next; |
|
if (pktl == s->parse_queue_end) |
|
return s->packet_buffer; |
|
return NULL; |
|
} |
|
|
|
static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
|
int64_t dts, int64_t pts) |
|
{ |
|
AVStream *st= s->streams[stream_index]; |
|
AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer; |
|
int64_t pts_buffer[MAX_REORDER_DELAY+1]; |
|
int64_t shift; |
|
int i, delay; |
|
|
|
if(st->first_dts != AV_NOPTS_VALUE || dts == AV_NOPTS_VALUE || st->cur_dts == AV_NOPTS_VALUE || is_relative(dts)) |
|
return; |
|
|
|
delay = st->codec->has_b_frames; |
|
st->first_dts= dts - (st->cur_dts - RELATIVE_TS_BASE); |
|
st->cur_dts= dts; |
|
shift = st->first_dts - RELATIVE_TS_BASE; |
|
|
|
for (i=0; i<MAX_REORDER_DELAY+1; i++) |
|
pts_buffer[i] = AV_NOPTS_VALUE; |
|
|
|
if (is_relative(pts)) |
|
pts += shift; |
|
|
|
for(; pktl; pktl= get_next_pkt(s, st, pktl)){ |
|
if(pktl->pkt.stream_index != stream_index) |
|
continue; |
|
if(is_relative(pktl->pkt.pts)) |
|
pktl->pkt.pts += shift; |
|
|
|
if(is_relative(pktl->pkt.dts)) |
|
pktl->pkt.dts += shift; |
|
|
|
if(st->start_time == AV_NOPTS_VALUE && pktl->pkt.pts != AV_NOPTS_VALUE) |
|
st->start_time= pktl->pkt.pts; |
|
|
|
if(pktl->pkt.pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){ |
|
pts_buffer[0]= pktl->pkt.pts; |
|
for(i=0; i<delay && pts_buffer[i] > pts_buffer[i+1]; i++) |
|
FFSWAP(int64_t, pts_buffer[i], pts_buffer[i+1]); |
|
if(pktl->pkt.dts == AV_NOPTS_VALUE) |
|
pktl->pkt.dts= pts_buffer[0]; |
|
} |
|
} |
|
if (st->start_time == AV_NOPTS_VALUE) |
|
st->start_time = pts; |
|
} |
|
|
|
static void update_initial_durations(AVFormatContext *s, AVStream *st, |
|
int stream_index, int duration) |
|
{ |
|
AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer; |
|
int64_t cur_dts= RELATIVE_TS_BASE; |
|
|
|
if(st->first_dts != AV_NOPTS_VALUE){ |
|
cur_dts= st->first_dts; |
|
for(; pktl; pktl= get_next_pkt(s, st, pktl)){ |
|
if(pktl->pkt.stream_index == stream_index){ |
|
if(pktl->pkt.pts != pktl->pkt.dts || pktl->pkt.dts != AV_NOPTS_VALUE || pktl->pkt.duration) |
|
break; |
|
cur_dts -= duration; |
|
} |
|
} |
|
if(pktl && pktl->pkt.dts != st->first_dts) { |
|
av_log(s, AV_LOG_DEBUG, "first_dts %s not matching first dts %s in que\n", av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts)); |
|
return; |
|
} |
|
if(!pktl) { |
|
av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in ques\n", av_ts2str(st->first_dts)); |
|
return; |
|
} |
|
pktl= s->parse_queue ? s->parse_queue : s->packet_buffer; |
|
st->first_dts = cur_dts; |
|
}else if(st->cur_dts != RELATIVE_TS_BASE) |
|
return; |
|
|
|
for(; pktl; pktl= get_next_pkt(s, st, pktl)){ |
|
if(pktl->pkt.stream_index != stream_index) |
|
continue; |
|
if(pktl->pkt.pts == pktl->pkt.dts && (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts) |
|
&& !pktl->pkt.duration){ |
|
pktl->pkt.dts= cur_dts; |
|
if(!st->codec->has_b_frames) |
|
pktl->pkt.pts= cur_dts; |
|
// if (st->codec->codec_type != AVMEDIA_TYPE_AUDIO) |
|
pktl->pkt.duration = duration; |
|
}else |
|
break; |
|
cur_dts = pktl->pkt.dts + pktl->pkt.duration; |
|
} |
|
if(!pktl) |
|
st->cur_dts= cur_dts; |
|
} |
|
|
|
static void compute_pkt_fields(AVFormatContext *s, AVStream *st, |
|
AVCodecParserContext *pc, AVPacket *pkt) |
|
{ |
|
int num, den, presentation_delayed, delay, i; |
|
int64_t offset; |
|
|
|
if (s->flags & AVFMT_FLAG_NOFILLIN) |
|
return; |
|
|
|
if((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE) |
|
pkt->dts= AV_NOPTS_VALUE; |
|
|
|
if (st->codec->codec_id != AV_CODEC_ID_H264 && pc && pc->pict_type == AV_PICTURE_TYPE_B) |
|
//FIXME Set low_delay = 0 when has_b_frames = 1 |
|
st->codec->has_b_frames = 1; |
|
|
|
/* do we have a video B-frame ? */ |
|
delay= st->codec->has_b_frames; |
|
presentation_delayed = 0; |
|
|
|
/* XXX: need has_b_frame, but cannot get it if the codec is |
|
not initialized */ |
|
if (delay && |
|
pc && pc->pict_type != AV_PICTURE_TYPE_B) |
|
presentation_delayed = 1; |
|
|
|
if(pkt->pts != AV_NOPTS_VALUE && pkt->dts != AV_NOPTS_VALUE && st->pts_wrap_bits<63 && pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > pkt->pts){ |
|
if(is_relative(st->cur_dts) || pkt->dts - (1LL<<(st->pts_wrap_bits-1)) > st->cur_dts) { |
|
pkt->dts -= 1LL<<st->pts_wrap_bits; |
|
} else |
|
pkt->pts += 1LL<<st->pts_wrap_bits; |
|
} |
|
|
|
// some mpeg2 in mpeg-ps lack dts (issue171 / input_file.mpg) |
|
// we take the conservative approach and discard both |
|
// Note, if this is misbehaving for a H.264 file then possibly presentation_delayed is not set correctly. |
|
if(delay==1 && pkt->dts == pkt->pts && pkt->dts != AV_NOPTS_VALUE && presentation_delayed){ |
|
av_log(s, AV_LOG_DEBUG, "invalid dts/pts combination %"PRIi64"\n", pkt->dts); |
|
if(strcmp(s->iformat->name, "mov,mp4,m4a,3gp,3g2,mj2")) // otherwise we discard correct timestamps for vc1-wmapro.ism |
|
pkt->dts= AV_NOPTS_VALUE; |
|
} |
|
|
|
if (pkt->duration == 0) { |
|
ff_compute_frame_duration(&num, &den, st, pc, pkt); |
|
if (den && num) { |
|
pkt->duration = av_rescale_rnd(1, num * (int64_t)st->time_base.den, den * (int64_t)st->time_base.num, AV_ROUND_DOWN); |
|
} |
|
} |
|
if(pkt->duration != 0 && (s->packet_buffer || s->parse_queue)) |
|
update_initial_durations(s, st, pkt->stream_index, pkt->duration); |
|
|
|
/* correct timestamps with byte offset if demuxers only have timestamps |
|
on packet boundaries */ |
|
if(pc && st->need_parsing == AVSTREAM_PARSE_TIMESTAMPS && pkt->size){ |
|
/* this will estimate bitrate based on this frame's duration and size */ |
|
offset = av_rescale(pc->offset, pkt->duration, pkt->size); |
|
if(pkt->pts != AV_NOPTS_VALUE) |
|
pkt->pts += offset; |
|
if(pkt->dts != AV_NOPTS_VALUE) |
|
pkt->dts += offset; |
|
} |
|
|
|
if (pc && pc->dts_sync_point >= 0) { |
|
// we have synchronization info from the parser |
|
int64_t den = st->codec->time_base.den * (int64_t) st->time_base.num; |
|
if (den > 0) { |
|
int64_t num = st->codec->time_base.num * (int64_t) st->time_base.den; |
|
if (pkt->dts != AV_NOPTS_VALUE) { |
|
// got DTS from the stream, update reference timestamp |
|
st->reference_dts = pkt->dts - pc->dts_ref_dts_delta * num / den; |
|
pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
|
} else if (st->reference_dts != AV_NOPTS_VALUE) { |
|
// compute DTS based on reference timestamp |
|
pkt->dts = st->reference_dts + pc->dts_ref_dts_delta * num / den; |
|
pkt->pts = pkt->dts + pc->pts_dts_delta * num / den; |
|
} |
|
if (pc->dts_sync_point > 0) |
|
st->reference_dts = pkt->dts; // new reference |
|
} |
|
} |
|
|
|
/* This may be redundant, but it should not hurt. */ |
|
if(pkt->dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && pkt->pts > pkt->dts) |
|
presentation_delayed = 1; |
|
|
|
av_dlog(NULL, "IN delayed:%d pts:%s, dts:%s cur_dts:%s st:%d pc:%p duration:%d\n", |
|
presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), pkt->stream_index, pc, pkt->duration); |
|
/* interpolate PTS and DTS if they are not present */ |
|
//We skip H264 currently because delay and has_b_frames are not reliably set |
|
if((delay==0 || (delay==1 && pc)) && st->codec->codec_id != AV_CODEC_ID_H264){ |
|
if (presentation_delayed) { |
|
/* DTS = decompression timestamp */ |
|
/* PTS = presentation timestamp */ |
|
if (pkt->dts == AV_NOPTS_VALUE) |
|
pkt->dts = st->last_IP_pts; |
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); |
|
if (pkt->dts == AV_NOPTS_VALUE) |
|
pkt->dts = st->cur_dts; |
|
|
|
/* this is tricky: the dts must be incremented by the duration |
|
of the frame we are displaying, i.e. the last I- or P-frame */ |
|
if (st->last_IP_duration == 0) |
|
st->last_IP_duration = pkt->duration; |
|
if(pkt->dts != AV_NOPTS_VALUE) |
|
st->cur_dts = pkt->dts + st->last_IP_duration; |
|
st->last_IP_duration = pkt->duration; |
|
st->last_IP_pts= pkt->pts; |
|
/* cannot compute PTS if not present (we can compute it only |
|
by knowing the future */ |
|
} else if (pkt->pts != AV_NOPTS_VALUE || |
|
pkt->dts != AV_NOPTS_VALUE || |
|
pkt->duration ) { |
|
int duration = pkt->duration; |
|
|
|
if(st->cur_dts != AV_NOPTS_VALUE && pkt->pts != AV_NOPTS_VALUE && duration){ |
|
int64_t old_diff= FFABS(st->cur_dts - duration - pkt->pts); |
|
int64_t new_diff= FFABS(st->cur_dts - pkt->pts); |
|
if( old_diff < new_diff && old_diff < (duration>>3) |
|
&& st->codec->codec_type == AVMEDIA_TYPE_VIDEO |
|
&& (!strcmp(s->iformat->name, "mpeg") || |
|
!strcmp(s->iformat->name, "mpegts"))){ |
|
pkt->pts += duration; |
|
av_log(s, AV_LOG_WARNING, "Adjusting PTS forward\n"); |
|
// av_log(NULL, AV_LOG_DEBUG, "id:%d old:%"PRId64" new:%"PRId64" dur:%d cur:%s size:%d\n", |
|
// pkt->stream_index, old_diff, new_diff, pkt->duration, av_ts2str(st->cur_dts), pkt->size); |
|
} |
|
} |
|
|
|
/* presentation is not delayed : PTS and DTS are the same */ |
|
if (pkt->pts == AV_NOPTS_VALUE) |
|
pkt->pts = pkt->dts; |
|
update_initial_timestamps(s, pkt->stream_index, pkt->pts, |
|
pkt->pts); |
|
if (pkt->pts == AV_NOPTS_VALUE) |
|
pkt->pts = st->cur_dts; |
|
pkt->dts = pkt->pts; |
|
if (pkt->pts != AV_NOPTS_VALUE) |
|
st->cur_dts = pkt->pts + duration; |
|
} |
|
} |
|
|
|
if(pkt->pts != AV_NOPTS_VALUE && delay <= MAX_REORDER_DELAY && has_decode_delay_been_guessed(st)){ |
|
st->pts_buffer[0]= pkt->pts; |
|
for(i=0; i<delay && st->pts_buffer[i] > st->pts_buffer[i+1]; i++) |
|
FFSWAP(int64_t, st->pts_buffer[i], st->pts_buffer[i+1]); |
|
if(pkt->dts == AV_NOPTS_VALUE) |
|
pkt->dts= st->pts_buffer[0]; |
|
} |
|
if(st->codec->codec_id == AV_CODEC_ID_H264){ // we skipped it above so we try here |
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts); // this should happen on the first packet |
|
} |
|
if(pkt->dts > st->cur_dts) |
|
st->cur_dts = pkt->dts; |
|
|
|
av_dlog(NULL, "OUTdelayed:%d/%d pts:%s, dts:%s cur_dts:%s\n", |
|
presentation_delayed, delay, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts)); |
|
|
|
/* update flags */ |
|
if (is_intra_only(st->codec)) |
|
pkt->flags |= AV_PKT_FLAG_KEY; |
|
if (pc) |
|
pkt->convergence_duration = pc->convergence_duration; |
|
} |
|
|
|
static void free_packet_buffer(AVPacketList **pkt_buf, AVPacketList **pkt_buf_end) |
|
{ |
|
while (*pkt_buf) { |
|
AVPacketList *pktl = *pkt_buf; |
|
*pkt_buf = pktl->next; |
|
av_free_packet(&pktl->pkt); |
|
av_freep(&pktl); |
|
} |
|
*pkt_buf_end = NULL; |
|
} |
|
|
|
/** |
|
* Parse a packet, add all split parts to parse_queue |
|
* |
|
* @param pkt packet to parse, NULL when flushing the parser at end of stream |
|
*/ |
|
static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index) |
|
{ |
|
AVPacket out_pkt = { 0 }, flush_pkt = { 0 }; |
|
AVStream *st = s->streams[stream_index]; |
|
uint8_t *data = pkt ? pkt->data : NULL; |
|
int size = pkt ? pkt->size : 0; |
|
int ret = 0, got_output = 0; |
|
|
|
if (!pkt) { |
|
av_init_packet(&flush_pkt); |
|
pkt = &flush_pkt; |
|
got_output = 1; |
|
} else if (!size && st->parser->flags & PARSER_FLAG_COMPLETE_FRAMES) { |
|
// preserve 0-size sync packets |
|
compute_pkt_fields(s, st, st->parser, pkt); |
|
} |
|
|
|
while (size > 0 || (pkt == &flush_pkt && got_output)) { |
|
int len; |
|
|
|
av_init_packet(&out_pkt); |
|
len = av_parser_parse2(st->parser, st->codec, |
|
&out_pkt.data, &out_pkt.size, data, size, |
|
pkt->pts, pkt->dts, pkt->pos); |
|
|
|
pkt->pts = pkt->dts = AV_NOPTS_VALUE; |
|
pkt->pos = -1; |
|
/* increment read pointer */ |
|
data += len; |
|
size -= len; |
|
|
|
got_output = !!out_pkt.size; |
|
|
|
if (!out_pkt.size) |
|
continue; |
|
|
|
/* set the duration */ |
|
out_pkt.duration = 0; |
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
if (st->codec->sample_rate > 0) { |
|
out_pkt.duration = av_rescale_q_rnd(st->parser->duration, |
|
(AVRational){ 1, st->codec->sample_rate }, |
|
st->time_base, |
|
AV_ROUND_DOWN); |
|
} |
|
} else if (st->codec->time_base.num != 0 && |
|
st->codec->time_base.den != 0) { |
|
out_pkt.duration = av_rescale_q_rnd(st->parser->duration, |
|
st->codec->time_base, |
|
st->time_base, |
|
AV_ROUND_DOWN); |
|
} |
|
|
|
out_pkt.stream_index = st->index; |
|
out_pkt.pts = st->parser->pts; |
|
out_pkt.dts = st->parser->dts; |
|
out_pkt.pos = st->parser->pos; |
|
|
|
if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) |
|
out_pkt.pos = st->parser->frame_offset; |
|
|
|
if (st->parser->key_frame == 1 || |
|
(st->parser->key_frame == -1 && |
|
st->parser->pict_type == AV_PICTURE_TYPE_I)) |
|
out_pkt.flags |= AV_PKT_FLAG_KEY; |
|
|
|
if(st->parser->key_frame == -1 && st->parser->pict_type==AV_PICTURE_TYPE_NONE && (pkt->flags&AV_PKT_FLAG_KEY)) |
|
out_pkt.flags |= AV_PKT_FLAG_KEY; |
|
|
|
compute_pkt_fields(s, st, st->parser, &out_pkt); |
|
|
|
if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) { |
|
out_pkt.destruct = pkt->destruct; |
|
pkt->destruct = NULL; |
|
} |
|
if ((ret = av_dup_packet(&out_pkt)) < 0) |
|
goto fail; |
|
|
|
if (!add_to_pktbuf(&s->parse_queue, &out_pkt, &s->parse_queue_end)) { |
|
av_free_packet(&out_pkt); |
|
ret = AVERROR(ENOMEM); |
|
goto fail; |
|
} |
|
} |
|
|
|
|
|
/* end of the stream => close and free the parser */ |
|
if (pkt == &flush_pkt) { |
|
av_parser_close(st->parser); |
|
st->parser = NULL; |
|
} |
|
|
|
fail: |
|
av_free_packet(pkt); |
|
return ret; |
|
} |
|
|
|
static int read_from_packet_buffer(AVPacketList **pkt_buffer, |
|
AVPacketList **pkt_buffer_end, |
|
AVPacket *pkt) |
|
{ |
|
AVPacketList *pktl; |
|
av_assert0(*pkt_buffer); |
|
pktl = *pkt_buffer; |
|
*pkt = pktl->pkt; |
|
*pkt_buffer = pktl->next; |
|
if (!pktl->next) |
|
*pkt_buffer_end = NULL; |
|
av_freep(&pktl); |
|
return 0; |
|
} |
|
|
|
static int read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
int ret = 0, i, got_packet = 0; |
|
|
|
av_init_packet(pkt); |
|
|
|
while (!got_packet && !s->parse_queue) { |
|
AVStream *st; |
|
AVPacket cur_pkt; |
|
|
|
/* read next packet */ |
|
ret = ff_read_packet(s, &cur_pkt); |
|
if (ret < 0) { |
|
if (ret == AVERROR(EAGAIN)) |
|
return ret; |
|
/* flush the parsers */ |
|
for(i = 0; i < s->nb_streams; i++) { |
|
st = s->streams[i]; |
|
if (st->parser && st->need_parsing) |
|
parse_packet(s, NULL, st->index); |
|
} |
|
/* all remaining packets are now in parse_queue => |
|
* really terminate parsing */ |
|
break; |
|
} |
|
ret = 0; |
|
st = s->streams[cur_pkt.stream_index]; |
|
|
|
if (cur_pkt.pts != AV_NOPTS_VALUE && |
|
cur_pkt.dts != AV_NOPTS_VALUE && |
|
cur_pkt.pts < cur_pkt.dts) { |
|
av_log(s, AV_LOG_WARNING, "Invalid timestamps stream=%d, pts=%s, dts=%s, size=%d\n", |
|
cur_pkt.stream_index, |
|
av_ts2str(cur_pkt.pts), |
|
av_ts2str(cur_pkt.dts), |
|
cur_pkt.size); |
|
} |
|
if (s->debug & FF_FDEBUG_TS) |
|
av_log(s, AV_LOG_DEBUG, "ff_read_packet stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n", |
|
cur_pkt.stream_index, |
|
av_ts2str(cur_pkt.pts), |
|
av_ts2str(cur_pkt.dts), |
|
cur_pkt.size, |
|
cur_pkt.duration, |
|
cur_pkt.flags); |
|
|
|
if (st->need_parsing && !st->parser && !(s->flags & AVFMT_FLAG_NOPARSE)) { |
|
st->parser = av_parser_init(st->codec->codec_id); |
|
if (!st->parser) { |
|
av_log(s, AV_LOG_VERBOSE, "parser not found for codec " |
|
"%s, packets or times may be invalid.\n", |
|
avcodec_get_name(st->codec->codec_id)); |
|
/* no parser available: just output the raw packets */ |
|
st->need_parsing = AVSTREAM_PARSE_NONE; |
|
} else if(st->need_parsing == AVSTREAM_PARSE_HEADERS) { |
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
|
} else if(st->need_parsing == AVSTREAM_PARSE_FULL_ONCE) { |
|
st->parser->flags |= PARSER_FLAG_ONCE; |
|
} else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) { |
|
st->parser->flags |= PARSER_FLAG_USE_CODEC_TS; |
|
} |
|
} |
|
|
|
if (!st->need_parsing || !st->parser) { |
|
/* no parsing needed: we just output the packet as is */ |
|
*pkt = cur_pkt; |
|
compute_pkt_fields(s, st, NULL, pkt); |
|
if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && |
|
(pkt->flags & AV_PKT_FLAG_KEY) && pkt->dts != AV_NOPTS_VALUE) { |
|
ff_reduce_index(s, st->index); |
|
av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME); |
|
} |
|
got_packet = 1; |
|
} else if (st->discard < AVDISCARD_ALL) { |
|
if ((ret = parse_packet(s, &cur_pkt, cur_pkt.stream_index)) < 0) |
|
return ret; |
|
} else { |
|
/* free packet */ |
|
av_free_packet(&cur_pkt); |
|
} |
|
if (pkt->flags & AV_PKT_FLAG_KEY) |
|
st->skip_to_keyframe = 0; |
|
if (st->skip_to_keyframe) { |
|
av_free_packet(&cur_pkt); |
|
got_packet = 0; |
|
} |
|
} |
|
|
|
if (!got_packet && s->parse_queue) |
|
ret = read_from_packet_buffer(&s->parse_queue, &s->parse_queue_end, pkt); |
|
|
|
if(s->debug & FF_FDEBUG_TS) |
|
av_log(s, AV_LOG_DEBUG, "read_frame_internal stream=%d, pts=%s, dts=%s, size=%d, duration=%d, flags=%d\n", |
|
pkt->stream_index, |
|
av_ts2str(pkt->pts), |
|
av_ts2str(pkt->dts), |
|
pkt->size, |
|
pkt->duration, |
|
pkt->flags); |
|
|
|
return ret; |
|
} |
|
|
|
int av_read_frame(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
const int genpts = s->flags & AVFMT_FLAG_GENPTS; |
|
int eof = 0; |
|
int ret; |
|
AVStream *st; |
|
|
|
if (!genpts) { |
|
ret = s->packet_buffer ? |
|
read_from_packet_buffer(&s->packet_buffer, &s->packet_buffer_end, pkt) : |
|
read_frame_internal(s, pkt); |
|
if (ret < 0) |
|
return ret; |
|
goto return_packet; |
|
} |
|
|
|
for (;;) { |
|
AVPacketList *pktl = s->packet_buffer; |
|
|
|
if (pktl) { |
|
AVPacket *next_pkt = &pktl->pkt; |
|
|
|
if (next_pkt->dts != AV_NOPTS_VALUE) { |
|
int wrap_bits = s->streams[next_pkt->stream_index]->pts_wrap_bits; |
|
// last dts seen for this stream. if any of packets following |
|
// current one had no dts, we will set this to AV_NOPTS_VALUE. |
|
int64_t last_dts = next_pkt->dts; |
|
while (pktl && next_pkt->pts == AV_NOPTS_VALUE) { |
|
if (pktl->pkt.stream_index == next_pkt->stream_index && |
|
(av_compare_mod(next_pkt->dts, pktl->pkt.dts, 2LL << (wrap_bits - 1)) < 0)) { |
|
if (av_compare_mod(pktl->pkt.pts, pktl->pkt.dts, 2LL << (wrap_bits - 1))) { //not b frame |
|
next_pkt->pts = pktl->pkt.dts; |
|
} |
|
if (last_dts != AV_NOPTS_VALUE) { |
|
// Once last dts was set to AV_NOPTS_VALUE, we don't change it. |
|
last_dts = pktl->pkt.dts; |
|
} |
|
} |
|
pktl = pktl->next; |
|
} |
|
if (eof && next_pkt->pts == AV_NOPTS_VALUE && last_dts != AV_NOPTS_VALUE) { |
|
// Fixing the last reference frame had none pts issue (For MXF etc). |
|
// We only do this when |
|
// 1. eof. |
|
// 2. we are not able to resolve a pts value for current packet. |
|
// 3. the packets for this stream at the end of the files had valid dts. |
|
next_pkt->pts = last_dts + next_pkt->duration; |
|
} |
|
pktl = s->packet_buffer; |
|
} |
|
|
|
/* read packet from packet buffer, if there is data */ |
|
if (!(next_pkt->pts == AV_NOPTS_VALUE && |
|
next_pkt->dts != AV_NOPTS_VALUE && !eof)) { |
|
ret = read_from_packet_buffer(&s->packet_buffer, |
|
&s->packet_buffer_end, pkt); |
|
goto return_packet; |
|
} |
|
} |
|
|
|
ret = read_frame_internal(s, pkt); |
|
if (ret < 0) { |
|
if (pktl && ret != AVERROR(EAGAIN)) { |
|
eof = 1; |
|
continue; |
|
} else |
|
return ret; |
|
} |
|
|
|
if (av_dup_packet(add_to_pktbuf(&s->packet_buffer, pkt, |
|
&s->packet_buffer_end)) < 0) |
|
return AVERROR(ENOMEM); |
|
} |
|
|
|
return_packet: |
|
|
|
st = s->streams[pkt->stream_index]; |
|
if (st->skip_samples) { |
|
uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10); |
|
AV_WL32(p, st->skip_samples); |
|
av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples); |
|
st->skip_samples = 0; |
|
} |
|
|
|
if ((s->iformat->flags & AVFMT_GENERIC_INDEX) && pkt->flags & AV_PKT_FLAG_KEY) { |
|
ff_reduce_index(s, st->index); |
|
av_add_index_entry(st, pkt->pos, pkt->dts, 0, 0, AVINDEX_KEYFRAME); |
|
} |
|
|
|
if (is_relative(pkt->dts)) |
|
pkt->dts -= RELATIVE_TS_BASE; |
|
if (is_relative(pkt->pts)) |
|
pkt->pts -= RELATIVE_TS_BASE; |
|
|
|
return ret; |
|
} |
|
|
|
/* XXX: suppress the packet queue */ |
|
static void flush_packet_queue(AVFormatContext *s) |
|
{ |
|
free_packet_buffer(&s->parse_queue, &s->parse_queue_end); |
|
free_packet_buffer(&s->packet_buffer, &s->packet_buffer_end); |
|
free_packet_buffer(&s->raw_packet_buffer, &s->raw_packet_buffer_end); |
|
|
|
s->raw_packet_buffer_remaining_size = RAW_PACKET_BUFFER_SIZE; |
|
} |
|
|
|
/*******************************************************/ |
|
/* seek support */ |
|
|
|
int av_find_default_stream_index(AVFormatContext *s) |
|
{ |
|
int first_audio_index = -1; |
|
int i; |
|
AVStream *st; |
|
|
|
if (s->nb_streams <= 0) |
|
return -1; |
|
for(i = 0; i < s->nb_streams; i++) { |
|
st = s->streams[i]; |
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
|
!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) { |
|
return i; |
|
} |
|
if (first_audio_index < 0 && st->codec->codec_type == AVMEDIA_TYPE_AUDIO) |
|
first_audio_index = i; |
|
} |
|
return first_audio_index >= 0 ? first_audio_index : 0; |
|
} |
|
|
|
/** |
|
* Flush the frame reader. |
|
*/ |
|
void ff_read_frame_flush(AVFormatContext *s) |
|
{ |
|
AVStream *st; |
|
int i, j; |
|
|
|
flush_packet_queue(s); |
|
|
|
/* for each stream, reset read state */ |
|
for(i = 0; i < s->nb_streams; i++) { |
|
st = s->streams[i]; |
|
|
|
if (st->parser) { |
|
av_parser_close(st->parser); |
|
st->parser = NULL; |
|
} |
|
st->last_IP_pts = AV_NOPTS_VALUE; |
|
if(st->first_dts == AV_NOPTS_VALUE) st->cur_dts = RELATIVE_TS_BASE; |
|
else st->cur_dts = AV_NOPTS_VALUE; /* we set the current DTS to an unspecified origin */ |
|
st->reference_dts = AV_NOPTS_VALUE; |
|
|
|
st->probe_packets = MAX_PROBE_PACKETS; |
|
|
|
for(j=0; j<MAX_REORDER_DELAY+1; j++) |
|
st->pts_buffer[j]= AV_NOPTS_VALUE; |
|
} |
|
} |
|
|
|
void ff_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp) |
|
{ |
|
int i; |
|
|
|
for(i = 0; i < s->nb_streams; i++) { |
|
AVStream *st = s->streams[i]; |
|
|
|
st->cur_dts = av_rescale(timestamp, |
|
st->time_base.den * (int64_t)ref_st->time_base.num, |
|
st->time_base.num * (int64_t)ref_st->time_base.den); |
|
} |
|
} |
|
|
|
void ff_reduce_index(AVFormatContext *s, int stream_index) |
|
{ |
|
AVStream *st= s->streams[stream_index]; |
|
unsigned int max_entries= s->max_index_size / sizeof(AVIndexEntry); |
|
|
|
if((unsigned)st->nb_index_entries >= max_entries){ |
|
int i; |
|
for(i=0; 2*i<st->nb_index_entries; i++) |
|
st->index_entries[i]= st->index_entries[2*i]; |
|
st->nb_index_entries= i; |
|
} |
|
} |
|
|
|
int ff_add_index_entry(AVIndexEntry **index_entries, |
|
int *nb_index_entries, |
|
unsigned int *index_entries_allocated_size, |
|
int64_t pos, int64_t timestamp, int size, int distance, int flags) |
|
{ |
|
AVIndexEntry *entries, *ie; |
|
int index; |
|
|
|
if((unsigned)*nb_index_entries + 1 >= UINT_MAX / sizeof(AVIndexEntry)) |
|
return -1; |
|
|
|
if(timestamp == AV_NOPTS_VALUE) |
|
return AVERROR(EINVAL); |
|
|
|
if (is_relative(timestamp)) //FIXME this maintains previous behavior but we should shift by the correct offset once known |
|
timestamp -= RELATIVE_TS_BASE; |
|
|
|
entries = av_fast_realloc(*index_entries, |
|
index_entries_allocated_size, |
|
(*nb_index_entries + 1) * |
|
sizeof(AVIndexEntry)); |
|
if(!entries) |
|
return -1; |
|
|
|
*index_entries= entries; |
|
|
|
index= ff_index_search_timestamp(*index_entries, *nb_index_entries, timestamp, AVSEEK_FLAG_ANY); |
|
|
|
if(index<0){ |
|
index= (*nb_index_entries)++; |
|
ie= &entries[index]; |
|
assert(index==0 || ie[-1].timestamp < timestamp); |
|
}else{ |
|
ie= &entries[index]; |
|
if(ie->timestamp != timestamp){ |
|
if(ie->timestamp <= timestamp) |
|
return -1; |
|
memmove(entries + index + 1, entries + index, sizeof(AVIndexEntry)*(*nb_index_entries - index)); |
|
(*nb_index_entries)++; |
|
}else if(ie->pos == pos && distance < ie->min_distance) //do not reduce the distance |
|
distance= ie->min_distance; |
|
} |
|
|
|
ie->pos = pos; |
|
ie->timestamp = timestamp; |
|
ie->min_distance= distance; |
|
ie->size= size; |
|
ie->flags = flags; |
|
|
|
return index; |
|
} |
|
|
|
int av_add_index_entry(AVStream *st, |
|
int64_t pos, int64_t timestamp, int size, int distance, int flags) |
|
{ |
|
return ff_add_index_entry(&st->index_entries, &st->nb_index_entries, |
|
&st->index_entries_allocated_size, pos, |
|
timestamp, size, distance, flags); |
|
} |
|
|
|
int ff_index_search_timestamp(const AVIndexEntry *entries, int nb_entries, |
|
int64_t wanted_timestamp, int flags) |
|
{ |
|
int a, b, m; |
|
int64_t timestamp; |
|
|
|
a = - 1; |
|
b = nb_entries; |
|
|
|
//optimize appending index entries at the end |
|
if(b && entries[b-1].timestamp < wanted_timestamp) |
|
a= b-1; |
|
|
|
while (b - a > 1) { |
|
m = (a + b) >> 1; |
|
timestamp = entries[m].timestamp; |
|
if(timestamp >= wanted_timestamp) |
|
b = m; |
|
if(timestamp <= wanted_timestamp) |
|
a = m; |
|
} |
|
m= (flags & AVSEEK_FLAG_BACKWARD) ? a : b; |
|
|
|
if(!(flags & AVSEEK_FLAG_ANY)){ |
|
while(m>=0 && m<nb_entries && !(entries[m].flags & AVINDEX_KEYFRAME)){ |
|
m += (flags & AVSEEK_FLAG_BACKWARD) ? -1 : 1; |
|
} |
|
} |
|
|
|
if(m == nb_entries) |
|
return -1; |
|
return m; |
|
} |
|
|
|
int av_index_search_timestamp(AVStream *st, int64_t wanted_timestamp, |
|
int flags) |
|
{ |
|
return ff_index_search_timestamp(st->index_entries, st->nb_index_entries, |
|
wanted_timestamp, flags); |
|
} |
|
|
|
int ff_seek_frame_binary(AVFormatContext *s, int stream_index, int64_t target_ts, int flags) |
|
{ |
|
AVInputFormat *avif= s->iformat; |
|
int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit; |
|
int64_t ts_min, ts_max, ts; |
|
int index; |
|
int64_t ret; |
|
AVStream *st; |
|
|
|
if (stream_index < 0) |
|
return -1; |
|
|
|
av_dlog(s, "read_seek: %d %s\n", stream_index, av_ts2str(target_ts)); |
|
|
|
ts_max= |
|
ts_min= AV_NOPTS_VALUE; |
|
pos_limit= -1; //gcc falsely says it may be uninitialized |
|
|
|
st= s->streams[stream_index]; |
|
if(st->index_entries){ |
|
AVIndexEntry *e; |
|
|
|
index= av_index_search_timestamp(st, target_ts, flags | AVSEEK_FLAG_BACKWARD); //FIXME whole func must be checked for non-keyframe entries in index case, especially read_timestamp() |
|
index= FFMAX(index, 0); |
|
e= &st->index_entries[index]; |
|
|
|
if(e->timestamp <= target_ts || e->pos == e->min_distance){ |
|
pos_min= e->pos; |
|
ts_min= e->timestamp; |
|
av_dlog(s, "using cached pos_min=0x%"PRIx64" dts_min=%s\n", |
|
pos_min, av_ts2str(ts_min)); |
|
}else{ |
|
assert(index==0); |
|
} |
|
|
|
index= av_index_search_timestamp(st, target_ts, flags & ~AVSEEK_FLAG_BACKWARD); |
|
assert(index < st->nb_index_entries); |
|
if(index >= 0){ |
|
e= &st->index_entries[index]; |
|
assert(e->timestamp >= target_ts); |
|
pos_max= e->pos; |
|
ts_max= e->timestamp; |
|
pos_limit= pos_max - e->min_distance; |
|
av_dlog(s, "using cached pos_max=0x%"PRIx64" pos_limit=0x%"PRIx64" dts_max=%s\n", |
|
pos_max, pos_limit, av_ts2str(ts_max)); |
|
} |
|
} |
|
|
|
pos= ff_gen_search(s, stream_index, target_ts, pos_min, pos_max, pos_limit, ts_min, ts_max, flags, &ts, avif->read_timestamp); |
|
if(pos<0) |
|
return -1; |
|
|
|
/* do the seek */ |
|
if ((ret = avio_seek(s->pb, pos, SEEK_SET)) < 0) |
|
return ret; |
|
|
|
ff_read_frame_flush(s); |
|
ff_update_cur_dts(s, st, ts); |
|
|
|
return 0; |
|
} |
|
|
|
int64_t ff_gen_search(AVFormatContext *s, int stream_index, int64_t target_ts, |
|
int64_t pos_min, int64_t pos_max, int64_t pos_limit, |
|
int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, |
|
int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) |
|
{ |
|
int64_t pos, ts; |
|
int64_t start_pos, filesize; |
|
int no_change; |
|
|
|
av_dlog(s, "gen_seek: %d %s\n", stream_index, av_ts2str(target_ts)); |
|
|
|
if(ts_min == AV_NOPTS_VALUE){ |
|
pos_min = s->data_offset; |
|
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
|
if (ts_min == AV_NOPTS_VALUE) |
|
return -1; |
|
} |
|
|
|
if(ts_min >= target_ts){ |
|
*ts_ret= ts_min; |
|
return pos_min; |
|
} |
|
|
|
if(ts_max == AV_NOPTS_VALUE){ |
|
int step= 1024; |
|
filesize = avio_size(s->pb); |
|
pos_max = filesize - 1; |
|
do{ |
|
pos_max -= step; |
|
ts_max = read_timestamp(s, stream_index, &pos_max, pos_max + step); |
|
step += step; |
|
}while(ts_max == AV_NOPTS_VALUE && pos_max >= step); |
|
if (ts_max == AV_NOPTS_VALUE) |
|
return -1; |
|
|
|
for(;;){ |
|
int64_t tmp_pos= pos_max + 1; |
|
int64_t tmp_ts= read_timestamp(s, stream_index, &tmp_pos, INT64_MAX); |
|
if(tmp_ts == AV_NOPTS_VALUE) |
|
break; |
|
ts_max= tmp_ts; |
|
pos_max= tmp_pos; |
|
if(tmp_pos >= filesize) |
|
break; |
|
} |
|
pos_limit= pos_max; |
|
} |
|
|
|
if(ts_max <= target_ts){ |
|
*ts_ret= ts_max; |
|
return pos_max; |
|
} |
|
|
|
if(ts_min > ts_max){ |
|
return -1; |
|
}else if(ts_min == ts_max){ |
|
pos_limit= pos_min; |
|
} |
|
|
|
no_change=0; |
|
while (pos_min < pos_limit) { |
|
av_dlog(s, "pos_min=0x%"PRIx64" pos_max=0x%"PRIx64" dts_min=%s dts_max=%s\n", |
|
pos_min, pos_max, av_ts2str(ts_min), av_ts2str(ts_max)); |
|
assert(pos_limit <= pos_max); |
|
|
|
if(no_change==0){ |
|
int64_t approximate_keyframe_distance= pos_max - pos_limit; |
|
// interpolate position (better than dichotomy) |
|
pos = av_rescale(target_ts - ts_min, pos_max - pos_min, ts_max - ts_min) |
|
+ pos_min - approximate_keyframe_distance; |
|
}else if(no_change==1){ |
|
// bisection, if interpolation failed to change min or max pos last time |
|
pos = (pos_min + pos_limit)>>1; |
|
}else{ |
|
/* linear search if bisection failed, can only happen if there |
|
are very few or no keyframes between min/max */ |
|
pos=pos_min; |
|
} |
|
if(pos <= pos_min) |
|
pos= pos_min + 1; |
|
else if(pos > pos_limit) |
|
pos= pos_limit; |
|
start_pos= pos; |
|
|
|
ts = read_timestamp(s, stream_index, &pos, INT64_MAX); //may pass pos_limit instead of -1 |
|
if(pos == pos_max) |
|
no_change++; |
|
else |
|
no_change=0; |
|
av_dlog(s, "%"PRId64" %"PRId64" %"PRId64" / %s %s %s target:%s limit:%"PRId64" start:%"PRId64" noc:%d\n", |
|
pos_min, pos, pos_max, |
|
av_ts2str(ts_min), av_ts2str(ts), av_ts2str(ts_max), av_ts2str(target_ts), |
|
pos_limit, start_pos, no_change); |
|
if(ts == AV_NOPTS_VALUE){ |
|
av_log(s, AV_LOG_ERROR, "read_timestamp() failed in the middle\n"); |
|
return -1; |
|
} |
|
assert(ts != AV_NOPTS_VALUE); |
|
if (target_ts <= ts) { |
|
pos_limit = start_pos - 1; |
|
pos_max = pos; |
|
ts_max = ts; |
|
} |
|
if (target_ts >= ts) { |
|
pos_min = pos; |
|
ts_min = ts; |
|
} |
|
} |
|
|
|
pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max; |
|
ts = (flags & AVSEEK_FLAG_BACKWARD) ? ts_min : ts_max; |
|
#if 0 |
|
pos_min = pos; |
|
ts_min = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
|
pos_min++; |
|
ts_max = read_timestamp(s, stream_index, &pos_min, INT64_MAX); |
|
av_dlog(s, "pos=0x%"PRIx64" %s<=%s<=%s\n", |
|
pos, av_ts2str(ts_min), av_ts2str(target_ts), av_ts2str(ts_max)); |
|
#endif |
|
*ts_ret= ts; |
|
return pos; |
|
} |
|
|
|
static int seek_frame_byte(AVFormatContext *s, int stream_index, int64_t pos, int flags){ |
|
int64_t pos_min, pos_max; |
|
|
|
pos_min = s->data_offset; |
|
pos_max = avio_size(s->pb) - 1; |
|
|
|
if (pos < pos_min) pos= pos_min; |
|
else if(pos > pos_max) pos= pos_max; |
|
|
|
avio_seek(s->pb, pos, SEEK_SET); |
|
|
|
return 0; |
|
} |
|
|
|
static int seek_frame_generic(AVFormatContext *s, |
|
int stream_index, int64_t timestamp, int flags) |
|
{ |
|
int index; |
|
int64_t ret; |
|
AVStream *st; |
|
AVIndexEntry *ie; |
|
|
|
st = s->streams[stream_index]; |
|
|
|
index = av_index_search_timestamp(st, timestamp, flags); |
|
|
|
if(index < 0 && st->nb_index_entries && timestamp < st->index_entries[0].timestamp) |
|
return -1; |
|
|
|
if(index < 0 || index==st->nb_index_entries-1){ |
|
AVPacket pkt; |
|
int nonkey=0; |
|
|
|
if(st->nb_index_entries){ |
|
assert(st->index_entries); |
|
ie= &st->index_entries[st->nb_index_entries-1]; |
|
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
|
return ret; |
|
ff_update_cur_dts(s, st, ie->timestamp); |
|
}else{ |
|
if ((ret = avio_seek(s->pb, s->data_offset, SEEK_SET)) < 0) |
|
return ret; |
|
} |
|
for (;;) { |
|
int read_status; |
|
do{ |
|
read_status = av_read_frame(s, &pkt); |
|
} while (read_status == AVERROR(EAGAIN)); |
|
if (read_status < 0) |
|
break; |
|
av_free_packet(&pkt); |
|
if(stream_index == pkt.stream_index && pkt.dts > timestamp){ |
|
if(pkt.flags & AV_PKT_FLAG_KEY) |
|
break; |
|
if(nonkey++ > 1000 && st->codec->codec_id != AV_CODEC_ID_CDGRAPHICS){ |
|
av_log(s, AV_LOG_ERROR,"seek_frame_generic failed as this stream seems to contain no keyframes after the target timestamp, %d non keyframes found\n", nonkey); |
|
break; |
|
} |
|
} |
|
} |
|
index = av_index_search_timestamp(st, timestamp, flags); |
|
} |
|
if (index < 0) |
|
return -1; |
|
|
|
ff_read_frame_flush(s); |
|
if (s->iformat->read_seek){ |
|
if(s->iformat->read_seek(s, stream_index, timestamp, flags) >= 0) |
|
return 0; |
|
} |
|
ie = &st->index_entries[index]; |
|
if ((ret = avio_seek(s->pb, ie->pos, SEEK_SET)) < 0) |
|
return ret; |
|
ff_update_cur_dts(s, st, ie->timestamp); |
|
|
|
return 0; |
|
} |
|
|
|
static int seek_frame_internal(AVFormatContext *s, int stream_index, |
|
int64_t timestamp, int flags) |
|
{ |
|
int ret; |
|
AVStream *st; |
|
|
|
if (flags & AVSEEK_FLAG_BYTE) { |
|
if (s->iformat->flags & AVFMT_NO_BYTE_SEEK) |
|
return -1; |
|
ff_read_frame_flush(s); |
|
return seek_frame_byte(s, stream_index, timestamp, flags); |
|
} |
|
|
|
if(stream_index < 0){ |
|
stream_index= av_find_default_stream_index(s); |
|
if(stream_index < 0) |
|
return -1; |
|
|
|
st= s->streams[stream_index]; |
|
/* timestamp for default must be expressed in AV_TIME_BASE units */ |
|
timestamp = av_rescale(timestamp, st->time_base.den, AV_TIME_BASE * (int64_t)st->time_base.num); |
|
} |
|
|
|
/* first, we try the format specific seek */ |
|
if (s->iformat->read_seek) { |
|
ff_read_frame_flush(s); |
|
ret = s->iformat->read_seek(s, stream_index, timestamp, flags); |
|
} else |
|
ret = -1; |
|
if (ret >= 0) { |
|
return 0; |
|
} |
|
|
|
if (s->iformat->read_timestamp && !(s->iformat->flags & AVFMT_NOBINSEARCH)) { |
|
ff_read_frame_flush(s); |
|
return ff_seek_frame_binary(s, stream_index, timestamp, flags); |
|
} else if (!(s->iformat->flags & AVFMT_NOGENSEARCH)) { |
|
ff_read_frame_flush(s); |
|
return seek_frame_generic(s, stream_index, timestamp, flags); |
|
} |
|
else |
|
return -1; |
|
} |
|
|
|
int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
|
{ |
|
int ret = seek_frame_internal(s, stream_index, timestamp, flags); |
|
|
|
if (ret >= 0) |
|
avformat_queue_attached_pictures(s); |
|
|
|
return ret; |
|
} |
|
|
|
int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags) |
|
{ |
|
if(min_ts > ts || max_ts < ts) |
|
return -1; |
|
|
|
if (s->iformat->read_seek2) { |
|
int ret; |
|
ff_read_frame_flush(s); |
|
ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags); |
|
|
|
if (ret >= 0) |
|
avformat_queue_attached_pictures(s); |
|
return ret; |
|
} |
|
|
|
if(s->iformat->read_timestamp){ |
|
//try to seek via read_timestamp() |
|
} |
|
|
|
//Fallback to old API if new is not implemented but old is |
|
//Note the old has somewhat different semantics |
|
if (s->iformat->read_seek || 1) { |
|
int dir = (ts - (uint64_t)min_ts > (uint64_t)max_ts - ts ? AVSEEK_FLAG_BACKWARD : 0); |
|
int ret = av_seek_frame(s, stream_index, ts, flags | dir); |
|
if (ret<0 && ts != min_ts && max_ts != ts) { |
|
ret = av_seek_frame(s, stream_index, dir ? max_ts : min_ts, flags | dir); |
|
if (ret >= 0) |
|
ret = av_seek_frame(s, stream_index, ts, flags | (dir^AVSEEK_FLAG_BACKWARD)); |
|
} |
|
return ret; |
|
} |
|
|
|
// try some generic seek like seek_frame_generic() but with new ts semantics |
|
} |
|
|
|
/*******************************************************/ |
|
|
|
/** |
|
* Return TRUE if the stream has accurate duration in any stream. |
|
* |
|
* @return TRUE if the stream has accurate duration for at least one component. |
|
*/ |
|
static int has_duration(AVFormatContext *ic) |
|
{ |
|
int i; |
|
AVStream *st; |
|
|
|
for(i = 0;i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (st->duration != AV_NOPTS_VALUE) |
|
return 1; |
|
} |
|
if (ic->duration != AV_NOPTS_VALUE) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
/** |
|
* Estimate the stream timings from the one of each components. |
|
* |
|
* Also computes the global bitrate if possible. |
|
*/ |
|
static void update_stream_timings(AVFormatContext *ic) |
|
{ |
|
int64_t start_time, start_time1, start_time_text, end_time, end_time1; |
|
int64_t duration, duration1, filesize; |
|
int i; |
|
AVStream *st; |
|
AVProgram *p; |
|
|
|
start_time = INT64_MAX; |
|
start_time_text = INT64_MAX; |
|
end_time = INT64_MIN; |
|
duration = INT64_MIN; |
|
for(i = 0;i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) { |
|
start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q); |
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE || st->codec->codec_type == AVMEDIA_TYPE_DATA) { |
|
if (start_time1 < start_time_text) |
|
start_time_text = start_time1; |
|
} else |
|
start_time = FFMIN(start_time, start_time1); |
|
end_time1 = AV_NOPTS_VALUE; |
|
if (st->duration != AV_NOPTS_VALUE) { |
|
end_time1 = start_time1 |
|
+ av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
|
end_time = FFMAX(end_time, end_time1); |
|
} |
|
for(p = NULL; (p = av_find_program_from_stream(ic, p, i)); ){ |
|
if(p->start_time == AV_NOPTS_VALUE || p->start_time > start_time1) |
|
p->start_time = start_time1; |
|
if(p->end_time < end_time1) |
|
p->end_time = end_time1; |
|
} |
|
} |
|
if (st->duration != AV_NOPTS_VALUE) { |
|
duration1 = av_rescale_q(st->duration, st->time_base, AV_TIME_BASE_Q); |
|
duration = FFMAX(duration, duration1); |
|
} |
|
} |
|
if (start_time == INT64_MAX || (start_time > start_time_text && start_time - start_time_text < AV_TIME_BASE)) |
|
start_time = start_time_text; |
|
else if(start_time > start_time_text) |
|
av_log(ic, AV_LOG_VERBOSE, "Ignoring outlier non primary stream starttime %f\n", start_time_text / (float)AV_TIME_BASE); |
|
|
|
if (start_time != INT64_MAX) { |
|
ic->start_time = start_time; |
|
if (end_time != INT64_MIN) { |
|
if (ic->nb_programs) { |
|
for (i=0; i<ic->nb_programs; i++) { |
|
p = ic->programs[i]; |
|
if(p->start_time != AV_NOPTS_VALUE && p->end_time > p->start_time) |
|
duration = FFMAX(duration, p->end_time - p->start_time); |
|
} |
|
} else |
|
duration = FFMAX(duration, end_time - start_time); |
|
} |
|
} |
|
if (duration != INT64_MIN && duration > 0 && ic->duration == AV_NOPTS_VALUE) { |
|
ic->duration = duration; |
|
} |
|
if (ic->pb && (filesize = avio_size(ic->pb)) > 0 && ic->duration != AV_NOPTS_VALUE) { |
|
/* compute the bitrate */ |
|
ic->bit_rate = (double)filesize * 8.0 * AV_TIME_BASE / |
|
(double)ic->duration; |
|
} |
|
} |
|
|
|
static void fill_all_stream_timings(AVFormatContext *ic) |
|
{ |
|
int i; |
|
AVStream *st; |
|
|
|
update_stream_timings(ic); |
|
for(i = 0;i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (st->start_time == AV_NOPTS_VALUE) { |
|
if(ic->start_time != AV_NOPTS_VALUE) |
|
st->start_time = av_rescale_q(ic->start_time, AV_TIME_BASE_Q, st->time_base); |
|
if(ic->duration != AV_NOPTS_VALUE) |
|
st->duration = av_rescale_q(ic->duration, AV_TIME_BASE_Q, st->time_base); |
|
} |
|
} |
|
} |
|
|
|
static void estimate_timings_from_bit_rate(AVFormatContext *ic) |
|
{ |
|
int64_t filesize, duration; |
|
int bit_rate, i; |
|
AVStream *st; |
|
|
|
/* if bit_rate is already set, we believe it */ |
|
if (ic->bit_rate <= 0) { |
|
bit_rate = 0; |
|
for(i=0;i<ic->nb_streams;i++) { |
|
st = ic->streams[i]; |
|
if (st->codec->bit_rate > 0) |
|
bit_rate += st->codec->bit_rate; |
|
} |
|
ic->bit_rate = bit_rate; |
|
} |
|
|
|
/* if duration is already set, we believe it */ |
|
if (ic->duration == AV_NOPTS_VALUE && |
|
ic->bit_rate != 0) { |
|
filesize = ic->pb ? avio_size(ic->pb) : 0; |
|
if (filesize > 0) { |
|
for(i = 0; i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
duration= av_rescale(8*filesize, st->time_base.den, ic->bit_rate*(int64_t)st->time_base.num); |
|
if (st->duration == AV_NOPTS_VALUE) |
|
st->duration = duration; |
|
} |
|
} |
|
} |
|
} |
|
|
|
#define DURATION_MAX_READ_SIZE 250000 |
|
#define DURATION_MAX_RETRY 4 |
|
|
|
/* only usable for MPEG-PS streams */ |
|
static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset) |
|
{ |
|
AVPacket pkt1, *pkt = &pkt1; |
|
AVStream *st; |
|
int read_size, i, ret; |
|
int64_t end_time; |
|
int64_t filesize, offset, duration; |
|
int retry=0; |
|
|
|
/* flush packet queue */ |
|
flush_packet_queue(ic); |
|
|
|
for (i=0; i<ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (st->start_time == AV_NOPTS_VALUE && st->first_dts == AV_NOPTS_VALUE) |
|
av_log(st->codec, AV_LOG_WARNING, "start time is not set in estimate_timings_from_pts\n"); |
|
|
|
if (st->parser) { |
|
av_parser_close(st->parser); |
|
st->parser= NULL; |
|
} |
|
} |
|
|
|
/* estimate the end time (duration) */ |
|
/* XXX: may need to support wrapping */ |
|
filesize = ic->pb ? avio_size(ic->pb) : 0; |
|
end_time = AV_NOPTS_VALUE; |
|
do{ |
|
offset = filesize - (DURATION_MAX_READ_SIZE<<retry); |
|
if (offset < 0) |
|
offset = 0; |
|
|
|
avio_seek(ic->pb, offset, SEEK_SET); |
|
read_size = 0; |
|
for(;;) { |
|
if (read_size >= DURATION_MAX_READ_SIZE<<(FFMAX(retry-1,0))) |
|
break; |
|
|
|
do { |
|
ret = ff_read_packet(ic, pkt); |
|
} while(ret == AVERROR(EAGAIN)); |
|
if (ret != 0) |
|
break; |
|
read_size += pkt->size; |
|
st = ic->streams[pkt->stream_index]; |
|
if (pkt->pts != AV_NOPTS_VALUE && |
|
(st->start_time != AV_NOPTS_VALUE || |
|
st->first_dts != AV_NOPTS_VALUE)) { |
|
duration = end_time = pkt->pts; |
|
if (st->start_time != AV_NOPTS_VALUE) |
|
duration -= st->start_time; |
|
else |
|
duration -= st->first_dts; |
|
if (duration < 0) |
|
duration += 1LL<<st->pts_wrap_bits; |
|
if (duration > 0) { |
|
if (st->duration == AV_NOPTS_VALUE || st->duration < duration) |
|
st->duration = duration; |
|
} |
|
} |
|
av_free_packet(pkt); |
|
} |
|
}while( end_time==AV_NOPTS_VALUE |
|
&& filesize > (DURATION_MAX_READ_SIZE<<retry) |
|
&& ++retry <= DURATION_MAX_RETRY); |
|
|
|
fill_all_stream_timings(ic); |
|
|
|
avio_seek(ic->pb, old_offset, SEEK_SET); |
|
for (i=0; i<ic->nb_streams; i++) { |
|
st= ic->streams[i]; |
|
st->cur_dts= st->first_dts; |
|
st->last_IP_pts = AV_NOPTS_VALUE; |
|
st->reference_dts = AV_NOPTS_VALUE; |
|
} |
|
} |
|
|
|
static void estimate_timings(AVFormatContext *ic, int64_t old_offset) |
|
{ |
|
int64_t file_size; |
|
|
|
/* get the file size, if possible */ |
|
if (ic->iformat->flags & AVFMT_NOFILE) { |
|
file_size = 0; |
|
} else { |
|
file_size = avio_size(ic->pb); |
|
file_size = FFMAX(0, file_size); |
|
} |
|
|
|
if ((!strcmp(ic->iformat->name, "mpeg") || |
|
!strcmp(ic->iformat->name, "mpegts")) && |
|
file_size && ic->pb->seekable) { |
|
/* get accurate estimate from the PTSes */ |
|
estimate_timings_from_pts(ic, old_offset); |
|
ic->duration_estimation_method = AVFMT_DURATION_FROM_PTS; |
|
} else if (has_duration(ic)) { |
|
/* at least one component has timings - we use them for all |
|
the components */ |
|
fill_all_stream_timings(ic); |
|
ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM; |
|
} else { |
|
av_log(ic, AV_LOG_WARNING, "Estimating duration from bitrate, this may be inaccurate\n"); |
|
/* less precise: use bitrate info */ |
|
estimate_timings_from_bit_rate(ic); |
|
ic->duration_estimation_method = AVFMT_DURATION_FROM_BITRATE; |
|
} |
|
update_stream_timings(ic); |
|
|
|
{ |
|
int i; |
|
AVStream av_unused *st; |
|
for(i = 0;i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
av_dlog(ic, "%d: start_time: %0.3f duration: %0.3f\n", i, |
|
(double) st->start_time / AV_TIME_BASE, |
|
(double) st->duration / AV_TIME_BASE); |
|
} |
|
av_dlog(ic, "stream: start_time: %0.3f duration: %0.3f bitrate=%d kb/s\n", |
|
(double) ic->start_time / AV_TIME_BASE, |
|
(double) ic->duration / AV_TIME_BASE, |
|
ic->bit_rate / 1000); |
|
} |
|
} |
|
|
|
static int has_codec_parameters(AVStream *st, const char **errmsg_ptr) |
|
{ |
|
AVCodecContext *avctx = st->codec; |
|
|
|
#define FAIL(errmsg) do { \ |
|
if (errmsg_ptr) \ |
|
*errmsg_ptr = errmsg; \ |
|
return 0; \ |
|
} while (0) |
|
|
|
switch (avctx->codec_type) { |
|
case AVMEDIA_TYPE_AUDIO: |
|
if (!avctx->frame_size && determinable_frame_size(avctx)) |
|
FAIL("unspecified frame size"); |
|
if (st->info->found_decoder >= 0 && avctx->sample_fmt == AV_SAMPLE_FMT_NONE) |
|
FAIL("unspecified sample format"); |
|
if (!avctx->sample_rate) |
|
FAIL("unspecified sample rate"); |
|
if (!avctx->channels) |
|
FAIL("unspecified number of channels"); |
|
if (st->info->found_decoder >= 0 && !st->nb_decoded_frames && avctx->codec_id == AV_CODEC_ID_DTS) |
|
FAIL("no decodable DTS frames"); |
|
break; |
|
case AVMEDIA_TYPE_VIDEO: |
|
if (!avctx->width) |
|
FAIL("unspecified size"); |
|
if (st->info->found_decoder >= 0 && avctx->pix_fmt == AV_PIX_FMT_NONE) |
|
FAIL("unspecified pixel format"); |
|
break; |
|
case AVMEDIA_TYPE_SUBTITLE: |
|
if (avctx->codec_id == AV_CODEC_ID_HDMV_PGS_SUBTITLE && !avctx->width) |
|
FAIL("unspecified size"); |
|
break; |
|
case AVMEDIA_TYPE_DATA: |
|
if(avctx->codec_id == AV_CODEC_ID_NONE) return 1; |
|
} |
|
|
|
if (avctx->codec_id == AV_CODEC_ID_NONE) |
|
FAIL("unknown codec"); |
|
return 1; |
|
} |
|
|
|
/* returns 1 or 0 if or if not decoded data was returned, or a negative error */ |
|
static int try_decode_frame(AVStream *st, AVPacket *avpkt, AVDictionary **options) |
|
{ |
|
const AVCodec *codec; |
|
int got_picture = 1, ret = 0; |
|
AVFrame *frame = avcodec_alloc_frame(); |
|
AVSubtitle subtitle; |
|
AVPacket pkt = *avpkt; |
|
|
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
|
|
if (!avcodec_is_open(st->codec) && !st->info->found_decoder) { |
|
AVDictionary *thread_opt = NULL; |
|
|
|
codec = st->codec->codec ? st->codec->codec : |
|
avcodec_find_decoder(st->codec->codec_id); |
|
|
|
if (!codec) { |
|
st->info->found_decoder = -1; |
|
ret = -1; |
|
goto fail; |
|
} |
|
|
|
/* force thread count to 1 since the h264 decoder will not extract SPS |
|
* and PPS to extradata during multi-threaded decoding */ |
|
av_dict_set(options ? options : &thread_opt, "threads", "1", 0); |
|
ret = avcodec_open2(st->codec, codec, options ? options : &thread_opt); |
|
if (!options) |
|
av_dict_free(&thread_opt); |
|
if (ret < 0) { |
|
st->info->found_decoder = -1; |
|
goto fail; |
|
} |
|
st->info->found_decoder = 1; |
|
} else if (!st->info->found_decoder) |
|
st->info->found_decoder = 1; |
|
|
|
if (st->info->found_decoder < 0) { |
|
ret = -1; |
|
goto fail; |
|
} |
|
|
|
while ((pkt.size > 0 || (!pkt.data && got_picture)) && |
|
ret >= 0 && |
|
(!has_codec_parameters(st, NULL) || |
|
!has_decode_delay_been_guessed(st) || |
|
(!st->codec_info_nb_frames && st->codec->codec->capabilities & CODEC_CAP_CHANNEL_CONF))) { |
|
got_picture = 0; |
|
avcodec_get_frame_defaults(frame); |
|
switch(st->codec->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
ret = avcodec_decode_video2(st->codec, frame, |
|
&got_picture, &pkt); |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
ret = avcodec_decode_audio4(st->codec, frame, &got_picture, &pkt); |
|
break; |
|
case AVMEDIA_TYPE_SUBTITLE: |
|
ret = avcodec_decode_subtitle2(st->codec, &subtitle, |
|
&got_picture, &pkt); |
|
ret = pkt.size; |
|
break; |
|
default: |
|
break; |
|
} |
|
if (ret >= 0) { |
|
if (got_picture) |
|
st->nb_decoded_frames++; |
|
pkt.data += ret; |
|
pkt.size -= ret; |
|
ret = got_picture; |
|
} |
|
} |
|
|
|
if(!pkt.data && !got_picture) |
|
ret = -1; |
|
|
|
fail: |
|
avcodec_free_frame(&frame); |
|
return ret; |
|
} |
|
|
|
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id) |
|
{ |
|
while (tags->id != AV_CODEC_ID_NONE) { |
|
if (tags->id == id) |
|
return tags->tag; |
|
tags++; |
|
} |
|
return 0; |
|
} |
|
|
|
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag) |
|
{ |
|
int i; |
|
for(i=0; tags[i].id != AV_CODEC_ID_NONE;i++) { |
|
if(tag == tags[i].tag) |
|
return tags[i].id; |
|
} |
|
for(i=0; tags[i].id != AV_CODEC_ID_NONE; i++) { |
|
if (avpriv_toupper4(tag) == avpriv_toupper4(tags[i].tag)) |
|
return tags[i].id; |
|
} |
|
return AV_CODEC_ID_NONE; |
|
} |
|
|
|
unsigned int av_codec_get_tag(const AVCodecTag * const *tags, enum AVCodecID id) |
|
{ |
|
int i; |
|
for(i=0; tags && tags[i]; i++){ |
|
int tag= ff_codec_get_tag(tags[i], id); |
|
if(tag) return tag; |
|
} |
|
return 0; |
|
} |
|
|
|
enum AVCodecID av_codec_get_id(const AVCodecTag * const *tags, unsigned int tag) |
|
{ |
|
int i; |
|
for(i=0; tags && tags[i]; i++){ |
|
enum AVCodecID id= ff_codec_get_id(tags[i], tag); |
|
if(id!=AV_CODEC_ID_NONE) return id; |
|
} |
|
return AV_CODEC_ID_NONE; |
|
} |
|
|
|
static void compute_chapters_end(AVFormatContext *s) |
|
{ |
|
unsigned int i, j; |
|
int64_t max_time = s->duration + ((s->start_time == AV_NOPTS_VALUE) ? 0 : s->start_time); |
|
|
|
for (i = 0; i < s->nb_chapters; i++) |
|
if (s->chapters[i]->end == AV_NOPTS_VALUE) { |
|
AVChapter *ch = s->chapters[i]; |
|
int64_t end = max_time ? av_rescale_q(max_time, AV_TIME_BASE_Q, ch->time_base) |
|
: INT64_MAX; |
|
|
|
for (j = 0; j < s->nb_chapters; j++) { |
|
AVChapter *ch1 = s->chapters[j]; |
|
int64_t next_start = av_rescale_q(ch1->start, ch1->time_base, ch->time_base); |
|
if (j != i && next_start > ch->start && next_start < end) |
|
end = next_start; |
|
} |
|
ch->end = (end == INT64_MAX) ? ch->start : end; |
|
} |
|
} |
|
|
|
static int get_std_framerate(int i){ |
|
if(i<60*12) return (i+1)*1001; |
|
else return ((const int[]){24,30,60,12,15,48})[i-60*12]*1000*12; |
|
} |
|
|
|
/* |
|
* Is the time base unreliable. |
|
* This is a heuristic to balance between quick acceptance of the values in |
|
* the headers vs. some extra checks. |
|
* Old DivX and Xvid often have nonsense timebases like 1fps or 2fps. |
|
* MPEG-2 commonly misuses field repeat flags to store different framerates. |
|
* And there are "variable" fps files this needs to detect as well. |
|
*/ |
|
static int tb_unreliable(AVCodecContext *c){ |
|
if( c->time_base.den >= 101L*c->time_base.num |
|
|| c->time_base.den < 5L*c->time_base.num |
|
/* || c->codec_tag == AV_RL32("DIVX") |
|
|| c->codec_tag == AV_RL32("XVID")*/ |
|
|| c->codec_tag == AV_RL32("mp4v") |
|
|| c->codec_id == AV_CODEC_ID_MPEG2VIDEO |
|
|| c->codec_id == AV_CODEC_ID_H264 |
|
) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
#if FF_API_FORMAT_PARAMETERS |
|
int av_find_stream_info(AVFormatContext *ic) |
|
{ |
|
return avformat_find_stream_info(ic, NULL); |
|
} |
|
#endif |
|
|
|
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
|
{ |
|
int i, count, ret, read_size, j; |
|
AVStream *st; |
|
AVPacket pkt1, *pkt; |
|
int64_t old_offset = avio_tell(ic->pb); |
|
int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those |
|
int flush_codecs = ic->probesize > 0; |
|
|
|
if(ic->pb) |
|
av_log(ic, AV_LOG_DEBUG, "File position before avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb)); |
|
|
|
for(i=0;i<ic->nb_streams;i++) { |
|
const AVCodec *codec; |
|
AVDictionary *thread_opt = NULL; |
|
st = ic->streams[i]; |
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO || |
|
st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) { |
|
/* if(!st->time_base.num) |
|
st->time_base= */ |
|
if(!st->codec->time_base.num) |
|
st->codec->time_base= st->time_base; |
|
} |
|
//only for the split stuff |
|
if (!st->parser && !(ic->flags & AVFMT_FLAG_NOPARSE)) { |
|
st->parser = av_parser_init(st->codec->codec_id); |
|
if(st->parser){ |
|
if(st->need_parsing == AVSTREAM_PARSE_HEADERS){ |
|
st->parser->flags |= PARSER_FLAG_COMPLETE_FRAMES; |
|
} else if(st->need_parsing == AVSTREAM_PARSE_FULL_RAW) { |
|
st->parser->flags |= PARSER_FLAG_USE_CODEC_TS; |
|
} |
|
} else if (st->need_parsing) { |
|
av_log(ic, AV_LOG_VERBOSE, "parser not found for codec " |
|
"%s, packets or times may be invalid.\n", |
|
avcodec_get_name(st->codec->codec_id)); |
|
} |
|
} |
|
codec = st->codec->codec ? st->codec->codec : |
|
avcodec_find_decoder(st->codec->codec_id); |
|
|
|
/* force thread count to 1 since the h264 decoder will not extract SPS |
|
* and PPS to extradata during multi-threaded decoding */ |
|
av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0); |
|
|
|
/* Ensure that subtitle_header is properly set. */ |
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE |
|
&& codec && !st->codec->codec) |
|
avcodec_open2(st->codec, codec, options ? &options[i] |
|
: &thread_opt); |
|
|
|
//try to just open decoders, in case this is enough to get parameters |
|
if (!has_codec_parameters(st, NULL) && st->request_probe <= 0) { |
|
if (codec && !st->codec->codec) |
|
avcodec_open2(st->codec, codec, options ? &options[i] |
|
: &thread_opt); |
|
} |
|
if (!options) |
|
av_dict_free(&thread_opt); |
|
} |
|
|
|
for (i=0; i<ic->nb_streams; i++) { |
|
#if FF_API_R_FRAME_RATE |
|
ic->streams[i]->info->last_dts = AV_NOPTS_VALUE; |
|
#endif |
|
ic->streams[i]->info->fps_first_dts = AV_NOPTS_VALUE; |
|
ic->streams[i]->info->fps_last_dts = AV_NOPTS_VALUE; |
|
} |
|
|
|
count = 0; |
|
read_size = 0; |
|
for(;;) { |
|
if (ff_check_interrupt(&ic->interrupt_callback)){ |
|
ret= AVERROR_EXIT; |
|
av_log(ic, AV_LOG_DEBUG, "interrupted\n"); |
|
break; |
|
} |
|
|
|
/* check if one codec still needs to be handled */ |
|
for(i=0;i<ic->nb_streams;i++) { |
|
int fps_analyze_framecount = 20; |
|
|
|
st = ic->streams[i]; |
|
if (!has_codec_parameters(st, NULL)) |
|
break; |
|
/* if the timebase is coarse (like the usual millisecond precision |
|
of mkv), we need to analyze more frames to reliably arrive at |
|
the correct fps */ |
|
if (av_q2d(st->time_base) > 0.0005) |
|
fps_analyze_framecount *= 2; |
|
if (ic->fps_probe_size >= 0) |
|
fps_analyze_framecount = ic->fps_probe_size; |
|
/* variable fps and no guess at the real fps */ |
|
if( tb_unreliable(st->codec) && !(st->r_frame_rate.num && st->avg_frame_rate.num) |
|
&& st->info->duration_count < fps_analyze_framecount |
|
&& st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
|
break; |
|
if(st->parser && st->parser->parser->split && !st->codec->extradata) |
|
break; |
|
if (st->first_dts == AV_NOPTS_VALUE && |
|
(st->codec->codec_type == AVMEDIA_TYPE_VIDEO || |
|
st->codec->codec_type == AVMEDIA_TYPE_AUDIO)) |
|
break; |
|
} |
|
if (i == ic->nb_streams) { |
|
/* NOTE: if the format has no header, then we need to read |
|
some packets to get most of the streams, so we cannot |
|
stop here */ |
|
if (!(ic->ctx_flags & AVFMTCTX_NOHEADER)) { |
|
/* if we found the info for all the codecs, we can stop */ |
|
ret = count; |
|
av_log(ic, AV_LOG_DEBUG, "All info found\n"); |
|
flush_codecs = 0; |
|
break; |
|
} |
|
} |
|
/* we did not get all the codec info, but we read too much data */ |
|
if (read_size >= ic->probesize) { |
|
ret = count; |
|
av_log(ic, AV_LOG_DEBUG, "Probe buffer size limit %d reached\n", ic->probesize); |
|
for (i = 0; i < ic->nb_streams; i++) |
|
if (!ic->streams[i]->r_frame_rate.num && |
|
ic->streams[i]->info->duration_count <= 1) |
|
av_log(ic, AV_LOG_WARNING, |
|
"Stream #%d: not enough frames to estimate rate; " |
|
"consider increasing probesize\n", i); |
|
break; |
|
} |
|
|
|
/* NOTE: a new stream can be added there if no header in file |
|
(AVFMTCTX_NOHEADER) */ |
|
ret = read_frame_internal(ic, &pkt1); |
|
if (ret == AVERROR(EAGAIN)) |
|
continue; |
|
|
|
if (ret < 0) { |
|
/* EOF or error*/ |
|
break; |
|
} |
|
|
|
if (ic->flags & AVFMT_FLAG_NOBUFFER) { |
|
pkt = &pkt1; |
|
} else { |
|
pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1, |
|
&ic->packet_buffer_end); |
|
if ((ret = av_dup_packet(pkt)) < 0) |
|
goto find_stream_info_err; |
|
} |
|
|
|
read_size += pkt->size; |
|
|
|
st = ic->streams[pkt->stream_index]; |
|
if (pkt->dts != AV_NOPTS_VALUE && st->codec_info_nb_frames > 1) { |
|
/* check for non-increasing dts */ |
|
if (st->info->fps_last_dts != AV_NOPTS_VALUE && |
|
st->info->fps_last_dts >= pkt->dts) { |
|
av_log(ic, AV_LOG_DEBUG, "Non-increasing DTS in stream %d: " |
|
"packet %d with DTS %"PRId64", packet %d with DTS " |
|
"%"PRId64"\n", st->index, st->info->fps_last_dts_idx, |
|
st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts); |
|
st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE; |
|
} |
|
/* check for a discontinuity in dts - if the difference in dts |
|
* is more than 1000 times the average packet duration in the sequence, |
|
* we treat it as a discontinuity */ |
|
if (st->info->fps_last_dts != AV_NOPTS_VALUE && |
|
st->info->fps_last_dts_idx > st->info->fps_first_dts_idx && |
|
(pkt->dts - st->info->fps_last_dts) / 1000 > |
|
(st->info->fps_last_dts - st->info->fps_first_dts) / (st->info->fps_last_dts_idx - st->info->fps_first_dts_idx)) { |
|
av_log(ic, AV_LOG_WARNING, "DTS discontinuity in stream %d: " |
|
"packet %d with DTS %"PRId64", packet %d with DTS " |
|
"%"PRId64"\n", st->index, st->info->fps_last_dts_idx, |
|
st->info->fps_last_dts, st->codec_info_nb_frames, pkt->dts); |
|
st->info->fps_first_dts = st->info->fps_last_dts = AV_NOPTS_VALUE; |
|
} |
|
|
|
/* update stored dts values */ |
|
if (st->info->fps_first_dts == AV_NOPTS_VALUE) { |
|
st->info->fps_first_dts = pkt->dts; |
|
st->info->fps_first_dts_idx = st->codec_info_nb_frames; |
|
} |
|
st->info->fps_last_dts = pkt->dts; |
|
st->info->fps_last_dts_idx = st->codec_info_nb_frames; |
|
} |
|
if (st->codec_info_nb_frames>1) { |
|
int64_t t=0; |
|
if (st->time_base.den > 0) |
|
t = av_rescale_q(st->info->codec_info_duration, st->time_base, AV_TIME_BASE_Q); |
|
if (st->avg_frame_rate.num > 0) |
|
t = FFMAX(t, av_rescale_q(st->codec_info_nb_frames, av_inv_q(st->avg_frame_rate), AV_TIME_BASE_Q)); |
|
|
|
if (t >= ic->max_analyze_duration) { |
|
av_log(ic, AV_LOG_WARNING, "max_analyze_duration %d reached at %"PRId64"\n", ic->max_analyze_duration, t); |
|
break; |
|
} |
|
if (pkt->duration) { |
|
st->info->codec_info_duration += pkt->duration; |
|
st->info->codec_info_duration_fields += st->parser && st->codec->ticks_per_frame==2 ? st->parser->repeat_pict + 1 : 2; |
|
} |
|
} |
|
#if FF_API_R_FRAME_RATE |
|
{ |
|
int64_t last = st->info->last_dts; |
|
|
|
if(pkt->dts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && pkt->dts > last){ |
|
double dts= (is_relative(pkt->dts) ? pkt->dts - RELATIVE_TS_BASE : pkt->dts) * av_q2d(st->time_base); |
|
int64_t duration= pkt->dts - last; |
|
|
|
// if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
|
// av_log(NULL, AV_LOG_ERROR, "%f\n", dts); |
|
for (i=0; i<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); i++) { |
|
int framerate= get_std_framerate(i); |
|
double sdts= dts*framerate/(1001*12); |
|
for(j=0; j<2; j++){ |
|
int ticks= lrintf(sdts+j*0.5); |
|
double error= sdts - ticks + j*0.5; |
|
st->info->duration_error[j][0][i] += error; |
|
st->info->duration_error[j][1][i] += error*error; |
|
} |
|
} |
|
st->info->duration_count++; |
|
// ignore the first 4 values, they might have some random jitter |
|
if (st->info->duration_count > 3) |
|
st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration); |
|
} |
|
if (pkt->dts != AV_NOPTS_VALUE) |
|
st->info->last_dts = pkt->dts; |
|
} |
|
#endif |
|
if(st->parser && st->parser->parser->split && !st->codec->extradata){ |
|
int i= st->parser->parser->split(st->codec, pkt->data, pkt->size); |
|
if (i > 0 && i < FF_MAX_EXTRADATA_SIZE) { |
|
st->codec->extradata_size= i; |
|
st->codec->extradata= av_malloc(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (!st->codec->extradata) |
|
return AVERROR(ENOMEM); |
|
memcpy(st->codec->extradata, pkt->data, st->codec->extradata_size); |
|
memset(st->codec->extradata + i, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
|
} |
|
} |
|
|
|
/* if still no information, we try to open the codec and to |
|
decompress the frame. We try to avoid that in most cases as |
|
it takes longer and uses more memory. For MPEG-4, we need to |
|
decompress for QuickTime. |
|
|
|
If CODEC_CAP_CHANNEL_CONF is set this will force decoding of at |
|
least one frame of codec data, this makes sure the codec initializes |
|
the channel configuration and does not only trust the values from the container. |
|
*/ |
|
try_decode_frame(st, pkt, (options && i < orig_nb_streams ) ? &options[i] : NULL); |
|
|
|
st->codec_info_nb_frames++; |
|
count++; |
|
} |
|
|
|
if (flush_codecs) { |
|
AVPacket empty_pkt = { 0 }; |
|
int err = 0; |
|
av_init_packet(&empty_pkt); |
|
|
|
ret = -1; /* we could not have all the codec parameters before EOF */ |
|
for(i=0;i<ic->nb_streams;i++) { |
|
const char *errmsg; |
|
|
|
st = ic->streams[i]; |
|
|
|
/* flush the decoders */ |
|
if (st->info->found_decoder == 1) { |
|
do { |
|
err = try_decode_frame(st, &empty_pkt, |
|
(options && i < orig_nb_streams) ? |
|
&options[i] : NULL); |
|
} while (err > 0 && !has_codec_parameters(st, NULL)); |
|
|
|
if (err < 0) { |
|
av_log(ic, AV_LOG_INFO, |
|
"decoding for stream %d failed\n", st->index); |
|
} |
|
} |
|
|
|
if (!has_codec_parameters(st, &errmsg)) { |
|
char buf[256]; |
|
avcodec_string(buf, sizeof(buf), st->codec, 0); |
|
av_log(ic, AV_LOG_WARNING, |
|
"Could not find codec parameters for stream %d (%s): %s\n" |
|
"Consider increasing the value for the 'analyzeduration' and 'probesize' options\n", |
|
i, buf, errmsg); |
|
} else { |
|
ret = 0; |
|
} |
|
} |
|
} |
|
|
|
// close codecs which were opened in try_decode_frame() |
|
for(i=0;i<ic->nb_streams;i++) { |
|
st = ic->streams[i]; |
|
avcodec_close(st->codec); |
|
} |
|
for(i=0;i<ic->nb_streams;i++) { |
|
st = ic->streams[i]; |
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
|
if(st->codec->codec_id == AV_CODEC_ID_RAWVIDEO && !st->codec->codec_tag && !st->codec->bits_per_coded_sample){ |
|
uint32_t tag= avcodec_pix_fmt_to_codec_tag(st->codec->pix_fmt); |
|
if(ff_find_pix_fmt(ff_raw_pix_fmt_tags, tag) == st->codec->pix_fmt) |
|
st->codec->codec_tag= tag; |
|
} |
|
|
|
/* estimate average framerate if not set by demuxer */ |
|
if (st->info->codec_info_duration_fields && !st->avg_frame_rate.num && st->info->codec_info_duration) { |
|
int best_fps = 0; |
|
double best_error = 0.01; |
|
|
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
|
st->info->codec_info_duration_fields*(int64_t)st->time_base.den, |
|
st->info->codec_info_duration*2*(int64_t)st->time_base.num, 60000); |
|
|
|
/* round guessed framerate to a "standard" framerate if it's |
|
* within 1% of the original estimate*/ |
|
for (j = 1; j < MAX_STD_TIMEBASES; j++) { |
|
AVRational std_fps = { get_std_framerate(j), 12*1001 }; |
|
double error = fabs(av_q2d(st->avg_frame_rate) / av_q2d(std_fps) - 1); |
|
|
|
if (error < best_error) { |
|
best_error = error; |
|
best_fps = std_fps.num; |
|
} |
|
} |
|
if (best_fps) { |
|
av_reduce(&st->avg_frame_rate.num, &st->avg_frame_rate.den, |
|
best_fps, 12*1001, INT_MAX); |
|
} |
|
} |
|
// the check for tb_unreliable() is not completely correct, since this is not about handling |
|
// a unreliable/inexact time base, but a time base that is finer than necessary, as e.g. |
|
// ipmovie.c produces. |
|
if (tb_unreliable(st->codec) && st->info->duration_count > 15 && st->info->duration_gcd > FFMAX(1, st->time_base.den/(500LL*st->time_base.num)) && !st->r_frame_rate.num) |
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, st->time_base.den, st->time_base.num * st->info->duration_gcd, INT_MAX); |
|
if (st->info->duration_count && !st->r_frame_rate.num |
|
&& tb_unreliable(st->codec)) { |
|
int num = 0; |
|
double best_error= 0.01; |
|
|
|
for (j=0; j<FF_ARRAY_ELEMS(st->info->duration_error[0][0]); j++) { |
|
int k; |
|
|
|
if(st->info->codec_info_duration && st->info->codec_info_duration*av_q2d(st->time_base) < (1001*12.0)/get_std_framerate(j)) |
|
continue; |
|
if(!st->info->codec_info_duration && 1.0 < (1001*12.0)/get_std_framerate(j)) |
|
continue; |
|
for(k=0; k<2; k++){ |
|
int n= st->info->duration_count; |
|
double a= st->info->duration_error[k][0][j] / n; |
|
double error= st->info->duration_error[k][1][j]/n - a*a; |
|
|
|
if(error < best_error && best_error> 0.000000001){ |
|
best_error= error; |
|
num = get_std_framerate(j); |
|
} |
|
if(error < 0.02) |
|
av_log(NULL, AV_LOG_DEBUG, "rfps: %f %f\n", get_std_framerate(j) / 12.0/1001, error); |
|
} |
|
} |
|
// do not increase frame rate by more than 1 % in order to match a standard rate. |
|
if (num && (!st->r_frame_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(st->r_frame_rate))) |
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); |
|
} |
|
|
|
if (!st->r_frame_rate.num){ |
|
if( st->codec->time_base.den * (int64_t)st->time_base.num |
|
<= st->codec->time_base.num * st->codec->ticks_per_frame * (int64_t)st->time_base.den){ |
|
st->r_frame_rate.num = st->codec->time_base.den; |
|
st->r_frame_rate.den = st->codec->time_base.num * st->codec->ticks_per_frame; |
|
}else{ |
|
st->r_frame_rate.num = st->time_base.den; |
|
st->r_frame_rate.den = st->time_base.num; |
|
} |
|
} |
|
}else if(st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
if(!st->codec->bits_per_coded_sample) |
|
st->codec->bits_per_coded_sample= av_get_bits_per_sample(st->codec->codec_id); |
|
// set stream disposition based on audio service type |
|
switch (st->codec->audio_service_type) { |
|
case AV_AUDIO_SERVICE_TYPE_EFFECTS: |
|
st->disposition = AV_DISPOSITION_CLEAN_EFFECTS; break; |
|
case AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED: |
|
st->disposition = AV_DISPOSITION_VISUAL_IMPAIRED; break; |
|
case AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED: |
|
st->disposition = AV_DISPOSITION_HEARING_IMPAIRED; break; |
|
case AV_AUDIO_SERVICE_TYPE_COMMENTARY: |
|
st->disposition = AV_DISPOSITION_COMMENT; break; |
|
case AV_AUDIO_SERVICE_TYPE_KARAOKE: |
|
st->disposition = AV_DISPOSITION_KARAOKE; break; |
|
} |
|
} |
|
} |
|
|
|
if(ic->probesize) |
|
estimate_timings(ic, old_offset); |
|
|
|
compute_chapters_end(ic); |
|
|
|
find_stream_info_err: |
|
for (i=0; i < ic->nb_streams; i++) { |
|
if (ic->streams[i]->codec) |
|
ic->streams[i]->codec->thread_count = 0; |
|
av_freep(&ic->streams[i]->info); |
|
} |
|
if(ic->pb) |
|
av_log(ic, AV_LOG_DEBUG, "File position after avformat_find_stream_info() is %"PRId64"\n", avio_tell(ic->pb)); |
|
return ret; |
|
} |
|
|
|
AVProgram *av_find_program_from_stream(AVFormatContext *ic, AVProgram *last, int s) |
|
{ |
|
int i, j; |
|
|
|
for (i = 0; i < ic->nb_programs; i++) { |
|
if (ic->programs[i] == last) { |
|
last = NULL; |
|
} else { |
|
if (!last) |
|
for (j = 0; j < ic->programs[i]->nb_stream_indexes; j++) |
|
if (ic->programs[i]->stream_index[j] == s) |
|
return ic->programs[i]; |
|
} |
|
} |
|
return NULL; |
|
} |
|
|
|
int av_find_best_stream(AVFormatContext *ic, |
|
enum AVMediaType type, |
|
int wanted_stream_nb, |
|
int related_stream, |
|
AVCodec **decoder_ret, |
|
int flags) |
|
{ |
|
int i, nb_streams = ic->nb_streams; |
|
int ret = AVERROR_STREAM_NOT_FOUND, best_count = -1; |
|
unsigned *program = NULL; |
|
AVCodec *decoder = NULL, *best_decoder = NULL; |
|
|
|
if (related_stream >= 0 && wanted_stream_nb < 0) { |
|
AVProgram *p = av_find_program_from_stream(ic, NULL, related_stream); |
|
if (p) { |
|
program = p->stream_index; |
|
nb_streams = p->nb_stream_indexes; |
|
} |
|
} |
|
for (i = 0; i < nb_streams; i++) { |
|
int real_stream_index = program ? program[i] : i; |
|
AVStream *st = ic->streams[real_stream_index]; |
|
AVCodecContext *avctx = st->codec; |
|
if (avctx->codec_type != type) |
|
continue; |
|
if (wanted_stream_nb >= 0 && real_stream_index != wanted_stream_nb) |
|
continue; |
|
if (st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED|AV_DISPOSITION_VISUAL_IMPAIRED)) |
|
continue; |
|
if (decoder_ret) { |
|
decoder = avcodec_find_decoder(st->codec->codec_id); |
|
if (!decoder) { |
|
if (ret < 0) |
|
ret = AVERROR_DECODER_NOT_FOUND; |
|
continue; |
|
} |
|
} |
|
if (best_count >= st->codec_info_nb_frames) |
|
continue; |
|
best_count = st->codec_info_nb_frames; |
|
ret = real_stream_index; |
|
best_decoder = decoder; |
|
if (program && i == nb_streams - 1 && ret < 0) { |
|
program = NULL; |
|
nb_streams = ic->nb_streams; |
|
i = 0; /* no related stream found, try again with everything */ |
|
} |
|
} |
|
if (decoder_ret) |
|
*decoder_ret = best_decoder; |
|
return ret; |
|
} |
|
|
|
/*******************************************************/ |
|
|
|
int av_read_play(AVFormatContext *s) |
|
{ |
|
if (s->iformat->read_play) |
|
return s->iformat->read_play(s); |
|
if (s->pb) |
|
return avio_pause(s->pb, 0); |
|
return AVERROR(ENOSYS); |
|
} |
|
|
|
int av_read_pause(AVFormatContext *s) |
|
{ |
|
if (s->iformat->read_pause) |
|
return s->iformat->read_pause(s); |
|
if (s->pb) |
|
return avio_pause(s->pb, 1); |
|
return AVERROR(ENOSYS); |
|
} |
|
|
|
void ff_free_stream(AVFormatContext *s, AVStream *st){ |
|
av_assert0(s->nb_streams>0); |
|
av_assert0(s->streams[ s->nb_streams-1 ] == st); |
|
|
|
if (st->parser) { |
|
av_parser_close(st->parser); |
|
} |
|
if (st->attached_pic.data) |
|
av_free_packet(&st->attached_pic); |
|
av_dict_free(&st->metadata); |
|
av_freep(&st->index_entries); |
|
av_freep(&st->codec->extradata); |
|
av_freep(&st->codec->subtitle_header); |
|
av_freep(&st->codec); |
|
av_freep(&st->priv_data); |
|
av_freep(&st->info); |
|
av_freep(&st->probe_data.buf); |
|
av_freep(&s->streams[ --s->nb_streams ]); |
|
} |
|
|
|
void avformat_free_context(AVFormatContext *s) |
|
{ |
|
int i; |
|
|
|
if (!s) |
|
return; |
|
|
|
av_opt_free(s); |
|
if (s->iformat && s->iformat->priv_class && s->priv_data) |
|
av_opt_free(s->priv_data); |
|
|
|
for(i=s->nb_streams-1; i>=0; i--) { |
|
ff_free_stream(s, s->streams[i]); |
|
} |
|
for(i=s->nb_programs-1; i>=0; i--) { |
|
av_dict_free(&s->programs[i]->metadata); |
|
av_freep(&s->programs[i]->stream_index); |
|
av_freep(&s->programs[i]); |
|
} |
|
av_freep(&s->programs); |
|
av_freep(&s->priv_data); |
|
while(s->nb_chapters--) { |
|
av_dict_free(&s->chapters[s->nb_chapters]->metadata); |
|
av_freep(&s->chapters[s->nb_chapters]); |
|
} |
|
av_freep(&s->chapters); |
|
av_dict_free(&s->metadata); |
|
av_freep(&s->streams); |
|
av_free(s); |
|
} |
|
|
|
#if FF_API_CLOSE_INPUT_FILE |
|
void av_close_input_file(AVFormatContext *s) |
|
{ |
|
avformat_close_input(&s); |
|
} |
|
#endif |
|
|
|
void avformat_close_input(AVFormatContext **ps) |
|
{ |
|
AVFormatContext *s = *ps; |
|
AVIOContext *pb = s->pb; |
|
|
|
if ((s->iformat && s->iformat->flags & AVFMT_NOFILE) || |
|
(s->flags & AVFMT_FLAG_CUSTOM_IO)) |
|
pb = NULL; |
|
|
|
flush_packet_queue(s); |
|
|
|
if (s->iformat) { |
|
if (s->iformat->read_close) |
|
s->iformat->read_close(s); |
|
} |
|
|
|
avformat_free_context(s); |
|
|
|
*ps = NULL; |
|
|
|
avio_close(pb); |
|
} |
|
|
|
#if FF_API_NEW_STREAM |
|
AVStream *av_new_stream(AVFormatContext *s, int id) |
|
{ |
|
AVStream *st = avformat_new_stream(s, NULL); |
|
if (st) |
|
st->id = id; |
|
return st; |
|
} |
|
#endif |
|
|
|
AVStream *avformat_new_stream(AVFormatContext *s, AVCodec *c) |
|
{ |
|
AVStream *st; |
|
int i; |
|
AVStream **streams; |
|
|
|
if (s->nb_streams >= INT_MAX/sizeof(*streams)) |
|
return NULL; |
|
streams = av_realloc(s->streams, (s->nb_streams + 1) * sizeof(*streams)); |
|
if (!streams) |
|
return NULL; |
|
s->streams = streams; |
|
|
|
st = av_mallocz(sizeof(AVStream)); |
|
if (!st) |
|
return NULL; |
|
if (!(st->info = av_mallocz(sizeof(*st->info)))) { |
|
av_free(st); |
|
return NULL; |
|
} |
|
st->info->last_dts = AV_NOPTS_VALUE; |
|
|
|
st->codec = avcodec_alloc_context3(c); |
|
if (s->iformat) { |
|
/* no default bitrate if decoding */ |
|
st->codec->bit_rate = 0; |
|
} |
|
st->index = s->nb_streams; |
|
st->start_time = AV_NOPTS_VALUE; |
|
st->duration = AV_NOPTS_VALUE; |
|
/* we set the current DTS to 0 so that formats without any timestamps |
|
but durations get some timestamps, formats with some unknown |
|
timestamps have their first few packets buffered and the |
|
timestamps corrected before they are returned to the user */ |
|
st->cur_dts = s->iformat ? RELATIVE_TS_BASE : 0; |
|
st->first_dts = AV_NOPTS_VALUE; |
|
st->probe_packets = MAX_PROBE_PACKETS; |
|
|
|
/* default pts setting is MPEG-like */ |
|
avpriv_set_pts_info(st, 33, 1, 90000); |
|
st->last_IP_pts = AV_NOPTS_VALUE; |
|
for(i=0; i<MAX_REORDER_DELAY+1; i++) |
|
st->pts_buffer[i]= AV_NOPTS_VALUE; |
|
st->reference_dts = AV_NOPTS_VALUE; |
|
|
|
st->sample_aspect_ratio = (AVRational){0,1}; |
|
|
|
#if FF_API_R_FRAME_RATE |
|
st->info->last_dts = AV_NOPTS_VALUE; |
|
#endif |
|
st->info->fps_first_dts = AV_NOPTS_VALUE; |
|
st->info->fps_last_dts = AV_NOPTS_VALUE; |
|
|
|
s->streams[s->nb_streams++] = st; |
|
return st; |
|
} |
|
|
|
AVProgram *av_new_program(AVFormatContext *ac, int id) |
|
{ |
|
AVProgram *program=NULL; |
|
int i; |
|
|
|
av_dlog(ac, "new_program: id=0x%04x\n", id); |
|
|
|
for(i=0; i<ac->nb_programs; i++) |
|
if(ac->programs[i]->id == id) |
|
program = ac->programs[i]; |
|
|
|
if(!program){ |
|
program = av_mallocz(sizeof(AVProgram)); |
|
if (!program) |
|
return NULL; |
|
dynarray_add(&ac->programs, &ac->nb_programs, program); |
|
program->discard = AVDISCARD_NONE; |
|
} |
|
program->id = id; |
|
|
|
program->start_time = |
|
program->end_time = AV_NOPTS_VALUE; |
|
|
|
return program; |
|
} |
|
|
|
AVChapter *avpriv_new_chapter(AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title) |
|
{ |
|
AVChapter *chapter = NULL; |
|
int i; |
|
|
|
for(i=0; i<s->nb_chapters; i++) |
|
if(s->chapters[i]->id == id) |
|
chapter = s->chapters[i]; |
|
|
|
if(!chapter){ |
|
chapter= av_mallocz(sizeof(AVChapter)); |
|
if(!chapter) |
|
return NULL; |
|
dynarray_add(&s->chapters, &s->nb_chapters, chapter); |
|
} |
|
av_dict_set(&chapter->metadata, "title", title, 0); |
|
chapter->id = id; |
|
chapter->time_base= time_base; |
|
chapter->start = start; |
|
chapter->end = end; |
|
|
|
return chapter; |
|
} |
|
|
|
void ff_program_add_stream_index(AVFormatContext *ac, int progid, unsigned int idx) |
|
{ |
|
int i, j; |
|
AVProgram *program=NULL; |
|
void *tmp; |
|
|
|
if (idx >= ac->nb_streams) { |
|
av_log(ac, AV_LOG_ERROR, "stream index %d is not valid\n", idx); |
|
return; |
|
} |
|
|
|
for(i=0; i<ac->nb_programs; i++){ |
|
if(ac->programs[i]->id != progid) |
|
continue; |
|
program = ac->programs[i]; |
|
for(j=0; j<program->nb_stream_indexes; j++) |
|
if(program->stream_index[j] == idx) |
|
return; |
|
|
|
tmp = av_realloc(program->stream_index, sizeof(unsigned int)*(program->nb_stream_indexes+1)); |
|
if(!tmp) |
|
return; |
|
program->stream_index = tmp; |
|
program->stream_index[program->nb_stream_indexes++] = idx; |
|
return; |
|
} |
|
} |
|
|
|
static void print_fps(double d, const char *postfix){ |
|
uint64_t v= lrintf(d*100); |
|
if (v% 100 ) av_log(NULL, AV_LOG_INFO, ", %3.2f %s", d, postfix); |
|
else if(v%(100*1000)) av_log(NULL, AV_LOG_INFO, ", %1.0f %s", d, postfix); |
|
else av_log(NULL, AV_LOG_INFO, ", %1.0fk %s", d/1000, postfix); |
|
} |
|
|
|
static void dump_metadata(void *ctx, AVDictionary *m, const char *indent) |
|
{ |
|
if(m && !(av_dict_count(m) == 1 && av_dict_get(m, "language", NULL, 0))){ |
|
AVDictionaryEntry *tag=NULL; |
|
|
|
av_log(ctx, AV_LOG_INFO, "%sMetadata:\n", indent); |
|
while((tag=av_dict_get(m, "", tag, AV_DICT_IGNORE_SUFFIX))) { |
|
if(strcmp("language", tag->key)){ |
|
const char *p = tag->value; |
|
av_log(ctx, AV_LOG_INFO, "%s %-16s: ", indent, tag->key); |
|
while(*p) { |
|
char tmp[256]; |
|
size_t len = strcspn(p, "\x8\xa\xb\xc\xd"); |
|
av_strlcpy(tmp, p, FFMIN(sizeof(tmp), len+1)); |
|
av_log(ctx, AV_LOG_INFO, "%s", tmp); |
|
p += len; |
|
if (*p == 0xd) av_log(ctx, AV_LOG_INFO, " "); |
|
if (*p == 0xa) av_log(ctx, AV_LOG_INFO, "\n%s %-16s: ", indent, ""); |
|
if (*p) p++; |
|
} |
|
av_log(ctx, AV_LOG_INFO, "\n"); |
|
} |
|
} |
|
} |
|
} |
|
|
|
/* "user interface" functions */ |
|
static void dump_stream_format(AVFormatContext *ic, int i, int index, int is_output) |
|
{ |
|
char buf[256]; |
|
int flags = (is_output ? ic->oformat->flags : ic->iformat->flags); |
|
AVStream *st = ic->streams[i]; |
|
int g = av_gcd(st->time_base.num, st->time_base.den); |
|
AVDictionaryEntry *lang = av_dict_get(st->metadata, "language", NULL, 0); |
|
avcodec_string(buf, sizeof(buf), st->codec, is_output); |
|
av_log(NULL, AV_LOG_INFO, " Stream #%d:%d", index, i); |
|
/* the pid is an important information, so we display it */ |
|
/* XXX: add a generic system */ |
|
if (flags & AVFMT_SHOW_IDS) |
|
av_log(NULL, AV_LOG_INFO, "[0x%x]", st->id); |
|
if (lang) |
|
av_log(NULL, AV_LOG_INFO, "(%s)", lang->value); |
|
av_log(NULL, AV_LOG_DEBUG, ", %d, %d/%d", st->codec_info_nb_frames, st->time_base.num/g, st->time_base.den/g); |
|
av_log(NULL, AV_LOG_INFO, ": %s", buf); |
|
if (st->sample_aspect_ratio.num && // default |
|
av_cmp_q(st->sample_aspect_ratio, st->codec->sample_aspect_ratio)) { |
|
AVRational display_aspect_ratio; |
|
av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den, |
|
st->codec->width*st->sample_aspect_ratio.num, |
|
st->codec->height*st->sample_aspect_ratio.den, |
|
1024*1024); |
|
av_log(NULL, AV_LOG_INFO, ", SAR %d:%d DAR %d:%d", |
|
st->sample_aspect_ratio.num, st->sample_aspect_ratio.den, |
|
display_aspect_ratio.num, display_aspect_ratio.den); |
|
} |
|
if(st->codec->codec_type == AVMEDIA_TYPE_VIDEO){ |
|
if(st->avg_frame_rate.den && st->avg_frame_rate.num) |
|
print_fps(av_q2d(st->avg_frame_rate), "fps"); |
|
#if FF_API_R_FRAME_RATE |
|
if(st->r_frame_rate.den && st->r_frame_rate.num) |
|
print_fps(av_q2d(st->r_frame_rate), "tbr"); |
|
#endif |
|
if(st->time_base.den && st->time_base.num) |
|
print_fps(1/av_q2d(st->time_base), "tbn"); |
|
if(st->codec->time_base.den && st->codec->time_base.num) |
|
print_fps(1/av_q2d(st->codec->time_base), "tbc"); |
|
} |
|
if (st->disposition & AV_DISPOSITION_DEFAULT) |
|
av_log(NULL, AV_LOG_INFO, " (default)"); |
|
if (st->disposition & AV_DISPOSITION_DUB) |
|
av_log(NULL, AV_LOG_INFO, " (dub)"); |
|
if (st->disposition & AV_DISPOSITION_ORIGINAL) |
|
av_log(NULL, AV_LOG_INFO, " (original)"); |
|
if (st->disposition & AV_DISPOSITION_COMMENT) |
|
av_log(NULL, AV_LOG_INFO, " (comment)"); |
|
if (st->disposition & AV_DISPOSITION_LYRICS) |
|
av_log(NULL, AV_LOG_INFO, " (lyrics)"); |
|
if (st->disposition & AV_DISPOSITION_KARAOKE) |
|
av_log(NULL, AV_LOG_INFO, " (karaoke)"); |
|
if (st->disposition & AV_DISPOSITION_FORCED) |
|
av_log(NULL, AV_LOG_INFO, " (forced)"); |
|
if (st->disposition & AV_DISPOSITION_HEARING_IMPAIRED) |
|
av_log(NULL, AV_LOG_INFO, " (hearing impaired)"); |
|
if (st->disposition & AV_DISPOSITION_VISUAL_IMPAIRED) |
|
av_log(NULL, AV_LOG_INFO, " (visual impaired)"); |
|
if (st->disposition & AV_DISPOSITION_CLEAN_EFFECTS) |
|
av_log(NULL, AV_LOG_INFO, " (clean effects)"); |
|
av_log(NULL, AV_LOG_INFO, "\n"); |
|
dump_metadata(NULL, st->metadata, " "); |
|
} |
|
|
|
void av_dump_format(AVFormatContext *ic, |
|
int index, |
|
const char *url, |
|
int is_output) |
|
{ |
|
int i; |
|
uint8_t *printed = ic->nb_streams ? av_mallocz(ic->nb_streams) : NULL; |
|
if (ic->nb_streams && !printed) |
|
return; |
|
|
|
av_log(NULL, AV_LOG_INFO, "%s #%d, %s, %s '%s':\n", |
|
is_output ? "Output" : "Input", |
|
index, |
|
is_output ? ic->oformat->name : ic->iformat->name, |
|
is_output ? "to" : "from", url); |
|
dump_metadata(NULL, ic->metadata, " "); |
|
if (!is_output) { |
|
av_log(NULL, AV_LOG_INFO, " Duration: "); |
|
if (ic->duration != AV_NOPTS_VALUE) { |
|
int hours, mins, secs, us; |
|
secs = ic->duration / AV_TIME_BASE; |
|
us = ic->duration % AV_TIME_BASE; |
|
mins = secs / 60; |
|
secs %= 60; |
|
hours = mins / 60; |
|
mins %= 60; |
|
av_log(NULL, AV_LOG_INFO, "%02d:%02d:%02d.%02d", hours, mins, secs, |
|
(100 * us) / AV_TIME_BASE); |
|
} else { |
|
av_log(NULL, AV_LOG_INFO, "N/A"); |
|
} |
|
if (ic->start_time != AV_NOPTS_VALUE) { |
|
int secs, us; |
|
av_log(NULL, AV_LOG_INFO, ", start: "); |
|
secs = ic->start_time / AV_TIME_BASE; |
|
us = abs(ic->start_time % AV_TIME_BASE); |
|
av_log(NULL, AV_LOG_INFO, "%d.%06d", |
|
secs, (int)av_rescale(us, 1000000, AV_TIME_BASE)); |
|
} |
|
av_log(NULL, AV_LOG_INFO, ", bitrate: "); |
|
if (ic->bit_rate) { |
|
av_log(NULL, AV_LOG_INFO,"%d kb/s", ic->bit_rate / 1000); |
|
} else { |
|
av_log(NULL, AV_LOG_INFO, "N/A"); |
|
} |
|
av_log(NULL, AV_LOG_INFO, "\n"); |
|
} |
|
for (i = 0; i < ic->nb_chapters; i++) { |
|
AVChapter *ch = ic->chapters[i]; |
|
av_log(NULL, AV_LOG_INFO, " Chapter #%d.%d: ", index, i); |
|
av_log(NULL, AV_LOG_INFO, "start %f, ", ch->start * av_q2d(ch->time_base)); |
|
av_log(NULL, AV_LOG_INFO, "end %f\n", ch->end * av_q2d(ch->time_base)); |
|
|
|
dump_metadata(NULL, ch->metadata, " "); |
|
} |
|
if(ic->nb_programs) { |
|
int j, k, total = 0; |
|
for(j=0; j<ic->nb_programs; j++) { |
|
AVDictionaryEntry *name = av_dict_get(ic->programs[j]->metadata, |
|
"name", NULL, 0); |
|
av_log(NULL, AV_LOG_INFO, " Program %d %s\n", ic->programs[j]->id, |
|
name ? name->value : ""); |
|
dump_metadata(NULL, ic->programs[j]->metadata, " "); |
|
for(k=0; k<ic->programs[j]->nb_stream_indexes; k++) { |
|
dump_stream_format(ic, ic->programs[j]->stream_index[k], index, is_output); |
|
printed[ic->programs[j]->stream_index[k]] = 1; |
|
} |
|
total += ic->programs[j]->nb_stream_indexes; |
|
} |
|
if (total < ic->nb_streams) |
|
av_log(NULL, AV_LOG_INFO, " No Program\n"); |
|
} |
|
for(i=0;i<ic->nb_streams;i++) |
|
if (!printed[i]) |
|
dump_stream_format(ic, i, index, is_output); |
|
|
|
av_free(printed); |
|
} |
|
|
|
#if FF_API_AV_GETTIME && CONFIG_SHARED && HAVE_SYMVER |
|
FF_SYMVER(int64_t, av_gettime, (void), "LIBAVFORMAT_54") |
|
{ |
|
return av_gettime(); |
|
} |
|
#endif |
|
|
|
uint64_t ff_ntp_time(void) |
|
{ |
|
return (av_gettime() / 1000) * 1000 + NTP_OFFSET_US; |
|
} |
|
|
|
int av_get_frame_filename(char *buf, int buf_size, |
|
const char *path, int number) |
|
{ |
|
const char *p; |
|
char *q, buf1[20], c; |
|
int nd, len, percentd_found; |
|
|
|
q = buf; |
|
p = path; |
|
percentd_found = 0; |
|
for(;;) { |
|
c = *p++; |
|
if (c == '\0') |
|
break; |
|
if (c == '%') { |
|
do { |
|
nd = 0; |
|
while (isdigit(*p)) { |
|
nd = nd * 10 + *p++ - '0'; |
|
} |
|
c = *p++; |
|
} while (isdigit(c)); |
|
|
|
switch(c) { |
|
case '%': |
|
goto addchar; |
|
case 'd': |
|
if (percentd_found) |
|
goto fail; |
|
percentd_found = 1; |
|
snprintf(buf1, sizeof(buf1), "%0*d", nd, number); |
|
len = strlen(buf1); |
|
if ((q - buf + len) > buf_size - 1) |
|
goto fail; |
|
memcpy(q, buf1, len); |
|
q += len; |
|
break; |
|
default: |
|
goto fail; |
|
} |
|
} else { |
|
addchar: |
|
if ((q - buf) < buf_size - 1) |
|
*q++ = c; |
|
} |
|
} |
|
if (!percentd_found) |
|
goto fail; |
|
*q = '\0'; |
|
return 0; |
|
fail: |
|
*q = '\0'; |
|
return -1; |
|
} |
|
|
|
static void hex_dump_internal(void *avcl, FILE *f, int level, |
|
const uint8_t *buf, int size) |
|
{ |
|
int len, i, j, c; |
|
#undef fprintf |
|
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
|
|
|
for(i=0;i<size;i+=16) { |
|
len = size - i; |
|
if (len > 16) |
|
len = 16; |
|
PRINT("%08x ", i); |
|
for(j=0;j<16;j++) { |
|
if (j < len) |
|
PRINT(" %02x", buf[i+j]); |
|
else |
|
PRINT(" "); |
|
} |
|
PRINT(" "); |
|
for(j=0;j<len;j++) { |
|
c = buf[i+j]; |
|
if (c < ' ' || c > '~') |
|
c = '.'; |
|
PRINT("%c", c); |
|
} |
|
PRINT("\n"); |
|
} |
|
#undef PRINT |
|
} |
|
|
|
void av_hex_dump(FILE *f, const uint8_t *buf, int size) |
|
{ |
|
hex_dump_internal(NULL, f, 0, buf, size); |
|
} |
|
|
|
void av_hex_dump_log(void *avcl, int level, const uint8_t *buf, int size) |
|
{ |
|
hex_dump_internal(avcl, NULL, level, buf, size); |
|
} |
|
|
|
static void pkt_dump_internal(void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base) |
|
{ |
|
#undef fprintf |
|
#define PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0) |
|
PRINT("stream #%d:\n", pkt->stream_index); |
|
PRINT(" keyframe=%d\n", ((pkt->flags & AV_PKT_FLAG_KEY) != 0)); |
|
PRINT(" duration=%0.3f\n", pkt->duration * av_q2d(time_base)); |
|
/* DTS is _always_ valid after av_read_frame() */ |
|
PRINT(" dts="); |
|
if (pkt->dts == AV_NOPTS_VALUE) |
|
PRINT("N/A"); |
|
else |
|
PRINT("%0.3f", pkt->dts * av_q2d(time_base)); |
|
/* PTS may not be known if B-frames are present. */ |
|
PRINT(" pts="); |
|
if (pkt->pts == AV_NOPTS_VALUE) |
|
PRINT("N/A"); |
|
else |
|
PRINT("%0.3f", pkt->pts * av_q2d(time_base)); |
|
PRINT("\n"); |
|
PRINT(" size=%d\n", pkt->size); |
|
#undef PRINT |
|
if (dump_payload) |
|
av_hex_dump(f, pkt->data, pkt->size); |
|
} |
|
|
|
#if FF_API_PKT_DUMP |
|
void av_pkt_dump(FILE *f, AVPacket *pkt, int dump_payload) |
|
{ |
|
AVRational tb = { 1, AV_TIME_BASE }; |
|
pkt_dump_internal(NULL, f, 0, pkt, dump_payload, tb); |
|
} |
|
#endif |
|
|
|
void av_pkt_dump2(FILE *f, AVPacket *pkt, int dump_payload, AVStream *st) |
|
{ |
|
pkt_dump_internal(NULL, f, 0, pkt, dump_payload, st->time_base); |
|
} |
|
|
|
#if FF_API_PKT_DUMP |
|
void av_pkt_dump_log(void *avcl, int level, AVPacket *pkt, int dump_payload) |
|
{ |
|
AVRational tb = { 1, AV_TIME_BASE }; |
|
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, tb); |
|
} |
|
#endif |
|
|
|
void av_pkt_dump_log2(void *avcl, int level, AVPacket *pkt, int dump_payload, |
|
AVStream *st) |
|
{ |
|
pkt_dump_internal(avcl, NULL, level, pkt, dump_payload, st->time_base); |
|
} |
|
|
|
void av_url_split(char *proto, int proto_size, |
|
char *authorization, int authorization_size, |
|
char *hostname, int hostname_size, |
|
int *port_ptr, |
|
char *path, int path_size, |
|
const char *url) |
|
{ |
|
const char *p, *ls, *ls2, *at, *col, *brk; |
|
|
|
if (port_ptr) *port_ptr = -1; |
|
if (proto_size > 0) proto[0] = 0; |
|
if (authorization_size > 0) authorization[0] = 0; |
|
if (hostname_size > 0) hostname[0] = 0; |
|
if (path_size > 0) path[0] = 0; |
|
|
|
/* parse protocol */ |
|
if ((p = strchr(url, ':'))) { |
|
av_strlcpy(proto, url, FFMIN(proto_size, p + 1 - url)); |
|
p++; /* skip ':' */ |
|
if (*p == '/') p++; |
|
if (*p == '/') p++; |
|
} else { |
|
/* no protocol means plain filename */ |
|
av_strlcpy(path, url, path_size); |
|
return; |
|
} |
|
|
|
/* separate path from hostname */ |
|
ls = strchr(p, '/'); |
|
ls2 = strchr(p, '?'); |
|
if(!ls) |
|
ls = ls2; |
|
else if (ls && ls2) |
|
ls = FFMIN(ls, ls2); |
|
if(ls) |
|
av_strlcpy(path, ls, path_size); |
|
else |
|
ls = &p[strlen(p)]; // XXX |
|
|
|
/* the rest is hostname, use that to parse auth/port */ |
|
if (ls != p) { |
|
/* authorization (user[:pass]@hostname) */ |
|
if ((at = strchr(p, '@')) && at < ls) { |
|
av_strlcpy(authorization, p, |
|
FFMIN(authorization_size, at + 1 - p)); |
|
p = at + 1; /* skip '@' */ |
|
} |
|
|
|
if (*p == '[' && (brk = strchr(p, ']')) && brk < ls) { |
|
/* [host]:port */ |
|
av_strlcpy(hostname, p + 1, |
|
FFMIN(hostname_size, brk - p)); |
|
if (brk[1] == ':' && port_ptr) |
|
*port_ptr = atoi(brk + 2); |
|
} else if ((col = strchr(p, ':')) && col < ls) { |
|
av_strlcpy(hostname, p, |
|
FFMIN(col + 1 - p, hostname_size)); |
|
if (port_ptr) *port_ptr = atoi(col + 1); |
|
} else |
|
av_strlcpy(hostname, p, |
|
FFMIN(ls + 1 - p, hostname_size)); |
|
} |
|
} |
|
|
|
char *ff_data_to_hex(char *buff, const uint8_t *src, int s, int lowercase) |
|
{ |
|
int i; |
|
static const char hex_table_uc[16] = { '0', '1', '2', '3', |
|
'4', '5', '6', '7', |
|
'8', '9', 'A', 'B', |
|
'C', 'D', 'E', 'F' }; |
|
static const char hex_table_lc[16] = { '0', '1', '2', '3', |
|
'4', '5', '6', '7', |
|
'8', '9', 'a', 'b', |
|
'c', 'd', 'e', 'f' }; |
|
const char *hex_table = lowercase ? hex_table_lc : hex_table_uc; |
|
|
|
for(i = 0; i < s; i++) { |
|
buff[i * 2] = hex_table[src[i] >> 4]; |
|
buff[i * 2 + 1] = hex_table[src[i] & 0xF]; |
|
} |
|
|
|
return buff; |
|
} |
|
|
|
int ff_hex_to_data(uint8_t *data, const char *p) |
|
{ |
|
int c, len, v; |
|
|
|
len = 0; |
|
v = 1; |
|
for (;;) { |
|
p += strspn(p, SPACE_CHARS); |
|
if (*p == '\0') |
|
break; |
|
c = toupper((unsigned char) *p++); |
|
if (c >= '0' && c <= '9') |
|
c = c - '0'; |
|
else if (c >= 'A' && c <= 'F') |
|
c = c - 'A' + 10; |
|
else |
|
break; |
|
v = (v << 4) | c; |
|
if (v & 0x100) { |
|
if (data) |
|
data[len] = v; |
|
len++; |
|
v = 1; |
|
} |
|
} |
|
return len; |
|
} |
|
|
|
#if FF_API_SET_PTS_INFO |
|
void av_set_pts_info(AVStream *s, int pts_wrap_bits, |
|
unsigned int pts_num, unsigned int pts_den) |
|
{ |
|
avpriv_set_pts_info(s, pts_wrap_bits, pts_num, pts_den); |
|
} |
|
#endif |
|
|
|
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, |
|
unsigned int pts_num, unsigned int pts_den) |
|
{ |
|
AVRational new_tb; |
|
if(av_reduce(&new_tb.num, &new_tb.den, pts_num, pts_den, INT_MAX)){ |
|
if(new_tb.num != pts_num) |
|
av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, pts_num/new_tb.num); |
|
}else |
|
av_log(NULL, AV_LOG_WARNING, "st:%d has too large timebase, reducing\n", s->index); |
|
|
|
if(new_tb.num <= 0 || new_tb.den <= 0) { |
|
av_log(NULL, AV_LOG_ERROR, "Ignoring attempt to set invalid timebase %d/%d for st:%d\n", new_tb.num, new_tb.den, s->index); |
|
return; |
|
} |
|
s->time_base = new_tb; |
|
av_codec_set_pkt_timebase(s->codec, new_tb); |
|
s->pts_wrap_bits = pts_wrap_bits; |
|
} |
|
|
|
int ff_url_join(char *str, int size, const char *proto, |
|
const char *authorization, const char *hostname, |
|
int port, const char *fmt, ...) |
|
{ |
|
#if CONFIG_NETWORK |
|
struct addrinfo hints = { 0 }, *ai; |
|
#endif |
|
|
|
str[0] = '\0'; |
|
if (proto) |
|
av_strlcatf(str, size, "%s://", proto); |
|
if (authorization && authorization[0]) |
|
av_strlcatf(str, size, "%s@", authorization); |
|
#if CONFIG_NETWORK && defined(AF_INET6) |
|
/* Determine if hostname is a numerical IPv6 address, |
|
* properly escape it within [] in that case. */ |
|
hints.ai_flags = AI_NUMERICHOST; |
|
if (!getaddrinfo(hostname, NULL, &hints, &ai)) { |
|
if (ai->ai_family == AF_INET6) { |
|
av_strlcat(str, "[", size); |
|
av_strlcat(str, hostname, size); |
|
av_strlcat(str, "]", size); |
|
} else { |
|
av_strlcat(str, hostname, size); |
|
} |
|
freeaddrinfo(ai); |
|
} else |
|
#endif |
|
/* Not an IPv6 address, just output the plain string. */ |
|
av_strlcat(str, hostname, size); |
|
|
|
if (port >= 0) |
|
av_strlcatf(str, size, ":%d", port); |
|
if (fmt) { |
|
va_list vl; |
|
int len = strlen(str); |
|
|
|
va_start(vl, fmt); |
|
vsnprintf(str + len, size > len ? size - len : 0, fmt, vl); |
|
va_end(vl); |
|
} |
|
return strlen(str); |
|
} |
|
|
|
int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt, |
|
AVFormatContext *src) |
|
{ |
|
AVPacket local_pkt; |
|
|
|
local_pkt = *pkt; |
|
local_pkt.stream_index = dst_stream; |
|
if (pkt->pts != AV_NOPTS_VALUE) |
|
local_pkt.pts = av_rescale_q(pkt->pts, |
|
src->streams[pkt->stream_index]->time_base, |
|
dst->streams[dst_stream]->time_base); |
|
if (pkt->dts != AV_NOPTS_VALUE) |
|
local_pkt.dts = av_rescale_q(pkt->dts, |
|
src->streams[pkt->stream_index]->time_base, |
|
dst->streams[dst_stream]->time_base); |
|
return av_write_frame(dst, &local_pkt); |
|
} |
|
|
|
void ff_parse_key_value(const char *str, ff_parse_key_val_cb callback_get_buf, |
|
void *context) |
|
{ |
|
const char *ptr = str; |
|
|
|
/* Parse key=value pairs. */ |
|
for (;;) { |
|
const char *key; |
|
char *dest = NULL, *dest_end; |
|
int key_len, dest_len = 0; |
|
|
|
/* Skip whitespace and potential commas. */ |
|
while (*ptr && (isspace(*ptr) || *ptr == ',')) |
|
ptr++; |
|
if (!*ptr) |
|
break; |
|
|
|
key = ptr; |
|
|
|
if (!(ptr = strchr(key, '='))) |
|
break; |
|
ptr++; |
|
key_len = ptr - key; |
|
|
|
callback_get_buf(context, key, key_len, &dest, &dest_len); |
|
dest_end = dest + dest_len - 1; |
|
|
|
if (*ptr == '\"') { |
|
ptr++; |
|
while (*ptr && *ptr != '\"') { |
|
if (*ptr == '\\') { |
|
if (!ptr[1]) |
|
break; |
|
if (dest && dest < dest_end) |
|
*dest++ = ptr[1]; |
|
ptr += 2; |
|
} else { |
|
if (dest && dest < dest_end) |
|
*dest++ = *ptr; |
|
ptr++; |
|
} |
|
} |
|
if (*ptr == '\"') |
|
ptr++; |
|
} else { |
|
for (; *ptr && !(isspace(*ptr) || *ptr == ','); ptr++) |
|
if (dest && dest < dest_end) |
|
*dest++ = *ptr; |
|
} |
|
if (dest) |
|
*dest = 0; |
|
} |
|
} |
|
|
|
int ff_find_stream_index(AVFormatContext *s, int id) |
|
{ |
|
int i; |
|
for (i = 0; i < s->nb_streams; i++) { |
|
if (s->streams[i]->id == id) |
|
return i; |
|
} |
|
return -1; |
|
} |
|
|
|
void ff_make_absolute_url(char *buf, int size, const char *base, |
|
const char *rel) |
|
{ |
|
char *sep, *path_query; |
|
/* Absolute path, relative to the current server */ |
|
if (base && strstr(base, "://") && rel[0] == '/') { |
|
if (base != buf) |
|
av_strlcpy(buf, base, size); |
|
sep = strstr(buf, "://"); |
|
if (sep) { |
|
/* Take scheme from base url */ |
|
if (rel[1] == '/') { |
|
sep[1] = '\0'; |
|
} else { |
|
/* Take scheme and host from base url */ |
|
sep += 3; |
|
sep = strchr(sep, '/'); |
|
if (sep) |
|
*sep = '\0'; |
|
} |
|
} |
|
av_strlcat(buf, rel, size); |
|
return; |
|
} |
|
/* If rel actually is an absolute url, just copy it */ |
|
if (!base || strstr(rel, "://") || rel[0] == '/') { |
|
av_strlcpy(buf, rel, size); |
|
return; |
|
} |
|
if (base != buf) |
|
av_strlcpy(buf, base, size); |
|
|
|
/* Strip off any query string from base */ |
|
path_query = strchr(buf, '?'); |
|
if (path_query != NULL) |
|
*path_query = '\0'; |
|
|
|
/* Is relative path just a new query part? */ |
|
if (rel[0] == '?') { |
|
av_strlcat(buf, rel, size); |
|
return; |
|
} |
|
|
|
/* Remove the file name from the base url */ |
|
sep = strrchr(buf, '/'); |
|
if (sep) |
|
sep[1] = '\0'; |
|
else |
|
buf[0] = '\0'; |
|
while (av_strstart(rel, "../", NULL) && sep) { |
|
/* Remove the path delimiter at the end */ |
|
sep[0] = '\0'; |
|
sep = strrchr(buf, '/'); |
|
/* If the next directory name to pop off is "..", break here */ |
|
if (!strcmp(sep ? &sep[1] : buf, "..")) { |
|
/* Readd the slash we just removed */ |
|
av_strlcat(buf, "/", size); |
|
break; |
|
} |
|
/* Cut off the directory name */ |
|
if (sep) |
|
sep[1] = '\0'; |
|
else |
|
buf[0] = '\0'; |
|
rel += 3; |
|
} |
|
av_strlcat(buf, rel, size); |
|
} |
|
|
|
int64_t ff_iso8601_to_unix_time(const char *datestr) |
|
{ |
|
struct tm time1 = {0}, time2 = {0}; |
|
char *ret1, *ret2; |
|
ret1 = av_small_strptime(datestr, "%Y - %m - %d %H:%M:%S", &time1); |
|
ret2 = av_small_strptime(datestr, "%Y - %m - %dT%H:%M:%S", &time2); |
|
if (ret2 && !ret1) |
|
return av_timegm(&time2); |
|
else |
|
return av_timegm(&time1); |
|
} |
|
|
|
int avformat_query_codec(AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance) |
|
{ |
|
if (ofmt) { |
|
if (ofmt->query_codec) |
|
return ofmt->query_codec(codec_id, std_compliance); |
|
else if (ofmt->codec_tag) |
|
return !!av_codec_get_tag(ofmt->codec_tag, codec_id); |
|
else if (codec_id == ofmt->video_codec || codec_id == ofmt->audio_codec || |
|
codec_id == ofmt->subtitle_codec) |
|
return 1; |
|
} |
|
return AVERROR_PATCHWELCOME; |
|
} |
|
|
|
int avformat_network_init(void) |
|
{ |
|
#if CONFIG_NETWORK |
|
int ret; |
|
ff_network_inited_globally = 1; |
|
if ((ret = ff_network_init()) < 0) |
|
return ret; |
|
ff_tls_init(); |
|
#endif |
|
return 0; |
|
} |
|
|
|
int avformat_network_deinit(void) |
|
{ |
|
#if CONFIG_NETWORK |
|
ff_network_close(); |
|
ff_tls_deinit(); |
|
#endif |
|
return 0; |
|
} |
|
|
|
int ff_add_param_change(AVPacket *pkt, int32_t channels, |
|
uint64_t channel_layout, int32_t sample_rate, |
|
int32_t width, int32_t height) |
|
{ |
|
uint32_t flags = 0; |
|
int size = 4; |
|
uint8_t *data; |
|
if (!pkt) |
|
return AVERROR(EINVAL); |
|
if (channels) { |
|
size += 4; |
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT; |
|
} |
|
if (channel_layout) { |
|
size += 8; |
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT; |
|
} |
|
if (sample_rate) { |
|
size += 4; |
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE; |
|
} |
|
if (width || height) { |
|
size += 8; |
|
flags |= AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS; |
|
} |
|
data = av_packet_new_side_data(pkt, AV_PKT_DATA_PARAM_CHANGE, size); |
|
if (!data) |
|
return AVERROR(ENOMEM); |
|
bytestream_put_le32(&data, flags); |
|
if (channels) |
|
bytestream_put_le32(&data, channels); |
|
if (channel_layout) |
|
bytestream_put_le64(&data, channel_layout); |
|
if (sample_rate) |
|
bytestream_put_le32(&data, sample_rate); |
|
if (width || height) { |
|
bytestream_put_le32(&data, width); |
|
bytestream_put_le32(&data, height); |
|
} |
|
return 0; |
|
} |
|
|
|
const struct AVCodecTag *avformat_get_riff_video_tags(void) |
|
{ |
|
return ff_codec_bmp_tags; |
|
} |
|
const struct AVCodecTag *avformat_get_riff_audio_tags(void) |
|
{ |
|
return ff_codec_wav_tags; |
|
} |
|
|
|
AVRational av_guess_sample_aspect_ratio(AVFormatContext *format, AVStream *stream, AVFrame *frame) |
|
{ |
|
AVRational undef = {0, 1}; |
|
AVRational stream_sample_aspect_ratio = stream ? stream->sample_aspect_ratio : undef; |
|
AVRational codec_sample_aspect_ratio = stream && stream->codec ? stream->codec->sample_aspect_ratio : undef; |
|
AVRational frame_sample_aspect_ratio = frame ? frame->sample_aspect_ratio : codec_sample_aspect_ratio; |
|
|
|
av_reduce(&stream_sample_aspect_ratio.num, &stream_sample_aspect_ratio.den, |
|
stream_sample_aspect_ratio.num, stream_sample_aspect_ratio.den, INT_MAX); |
|
if (stream_sample_aspect_ratio.num <= 0 || stream_sample_aspect_ratio.den <= 0) |
|
stream_sample_aspect_ratio = undef; |
|
|
|
av_reduce(&frame_sample_aspect_ratio.num, &frame_sample_aspect_ratio.den, |
|
frame_sample_aspect_ratio.num, frame_sample_aspect_ratio.den, INT_MAX); |
|
if (frame_sample_aspect_ratio.num <= 0 || frame_sample_aspect_ratio.den <= 0) |
|
frame_sample_aspect_ratio = undef; |
|
|
|
if (stream_sample_aspect_ratio.num) |
|
return stream_sample_aspect_ratio; |
|
else |
|
return frame_sample_aspect_ratio; |
|
} |
|
|
|
int avformat_match_stream_specifier(AVFormatContext *s, AVStream *st, |
|
const char *spec) |
|
{ |
|
if (*spec <= '9' && *spec >= '0') /* opt:index */ |
|
return strtol(spec, NULL, 0) == st->index; |
|
else if (*spec == 'v' || *spec == 'a' || *spec == 's' || *spec == 'd' || |
|
*spec == 't') { /* opt:[vasdt] */ |
|
enum AVMediaType type; |
|
|
|
switch (*spec++) { |
|
case 'v': type = AVMEDIA_TYPE_VIDEO; break; |
|
case 'a': type = AVMEDIA_TYPE_AUDIO; break; |
|
case 's': type = AVMEDIA_TYPE_SUBTITLE; break; |
|
case 'd': type = AVMEDIA_TYPE_DATA; break; |
|
case 't': type = AVMEDIA_TYPE_ATTACHMENT; break; |
|
default: av_assert0(0); |
|
} |
|
if (type != st->codec->codec_type) |
|
return 0; |
|
if (*spec++ == ':') { /* possibly followed by :index */ |
|
int i, index = strtol(spec, NULL, 0); |
|
for (i = 0; i < s->nb_streams; i++) |
|
if (s->streams[i]->codec->codec_type == type && index-- == 0) |
|
return i == st->index; |
|
return 0; |
|
} |
|
return 1; |
|
} else if (*spec == 'p' && *(spec + 1) == ':') { |
|
int prog_id, i, j; |
|
char *endptr; |
|
spec += 2; |
|
prog_id = strtol(spec, &endptr, 0); |
|
for (i = 0; i < s->nb_programs; i++) { |
|
if (s->programs[i]->id != prog_id) |
|
continue; |
|
|
|
if (*endptr++ == ':') { |
|
int stream_idx = strtol(endptr, NULL, 0); |
|
return stream_idx >= 0 && |
|
stream_idx < s->programs[i]->nb_stream_indexes && |
|
st->index == s->programs[i]->stream_index[stream_idx]; |
|
} |
|
|
|
for (j = 0; j < s->programs[i]->nb_stream_indexes; j++) |
|
if (st->index == s->programs[i]->stream_index[j]) |
|
return 1; |
|
} |
|
return 0; |
|
} else if (*spec == '#') { |
|
int sid; |
|
char *endptr; |
|
sid = strtol(spec + 1, &endptr, 0); |
|
if (!*endptr) |
|
return st->id == sid; |
|
} else if (!*spec) /* empty specifier, matches everything */ |
|
return 1; |
|
|
|
av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec); |
|
return AVERROR(EINVAL); |
|
}
|
|
|