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4434 lines
152 KiB
4434 lines
152 KiB
/* |
|
* 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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#undef NDEBUG |
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#include <assert.h> |
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#include <stdarg.h> |
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#include <stdint.h> |
|
|
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#include "config.h" |
|
|
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#include "libavutil/avassert.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/dict.h" |
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#include "libavutil/internal.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/parseutils.h" |
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#include "libavutil/pixdesc.h" |
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#include "libavutil/time.h" |
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#include "libavutil/timestamp.h" |
|
|
|
#include "libavcodec/bytestream.h" |
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#include "libavcodec/internal.h" |
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#include "libavcodec/raw.h" |
|
|
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#include "audiointerleave.h" |
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#include "avformat.h" |
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#include "avio_internal.h" |
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#include "id3v2.h" |
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#include "internal.h" |
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#include "metadata.h" |
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#if CONFIG_NETWORK |
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#include "network.h" |
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#endif |
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#include "riff.h" |
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#include "url.h" |
|
|
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#include "libavutil/ffversion.h" |
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const char av_format_ffversion[] = "FFmpeg version " FFMPEG_VERSION; |
|
|
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/** |
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* @file |
|
* various utility functions for use within FFmpeg |
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*/ |
|
|
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unsigned avformat_version(void) |
|
{ |
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av_assert0(LIBAVFORMAT_VERSION_MICRO >= 100); |
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return LIBAVFORMAT_VERSION_INT; |
|
} |
|
|
|
const char *avformat_configuration(void) |
|
{ |
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return FFMPEG_CONFIGURATION; |
|
} |
|
|
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const char *avformat_license(void) |
|
{ |
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#define LICENSE_PREFIX "libavformat license: " |
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return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1; |
|
} |
|
|
|
#define RELATIVE_TS_BASE (INT64_MAX - (1LL<<48)) |
|
|
|
static int is_relative(int64_t ts) { |
|
return ts > (RELATIVE_TS_BASE - (1LL<<48)); |
|
} |
|
|
|
/** |
|
* Wrap a given time stamp, if there is an indication for an overflow |
|
* |
|
* @param st stream |
|
* @param timestamp the time stamp to wrap |
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* @return resulting time stamp |
|
*/ |
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static int64_t wrap_timestamp(AVStream *st, int64_t timestamp) |
|
{ |
|
if (st->pts_wrap_behavior != AV_PTS_WRAP_IGNORE && |
|
st->pts_wrap_reference != AV_NOPTS_VALUE && timestamp != AV_NOPTS_VALUE) { |
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if (st->pts_wrap_behavior == AV_PTS_WRAP_ADD_OFFSET && |
|
timestamp < st->pts_wrap_reference) |
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return timestamp + (1ULL << st->pts_wrap_bits); |
|
else if (st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET && |
|
timestamp >= st->pts_wrap_reference) |
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return timestamp - (1ULL << st->pts_wrap_bits); |
|
} |
|
return timestamp; |
|
} |
|
|
|
MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate) |
|
MAKE_ACCESSORS(AVStream, stream, char *, recommended_encoder_configuration) |
|
MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec) |
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MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec) |
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MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec) |
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MAKE_ACCESSORS(AVFormatContext, format, int, metadata_header_padding) |
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MAKE_ACCESSORS(AVFormatContext, format, void *, opaque) |
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MAKE_ACCESSORS(AVFormatContext, format, av_format_control_message, control_message_cb) |
|
|
|
int64_t av_stream_get_end_pts(const AVStream *st) |
|
{ |
|
return st->pts.val; |
|
} |
|
|
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struct AVCodecParserContext *av_stream_get_parser(const AVStream *st) |
|
{ |
|
return st->parser; |
|
} |
|
|
|
void av_format_inject_global_side_data(AVFormatContext *s) |
|
{ |
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int i; |
|
s->internal->inject_global_side_data = 1; |
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for (i = 0; i < s->nb_streams; i++) { |
|
AVStream *st = s->streams[i]; |
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st->inject_global_side_data = 1; |
|
} |
|
} |
|
|
|
int ff_copy_whitelists(AVFormatContext *dst, AVFormatContext *src) |
|
{ |
|
av_assert0(!dst->codec_whitelist && !dst->format_whitelist); |
|
dst-> codec_whitelist = av_strdup(src->codec_whitelist); |
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dst->format_whitelist = av_strdup(src->format_whitelist); |
|
if ( (src-> codec_whitelist && !dst-> codec_whitelist) |
|
|| (src->format_whitelist && !dst->format_whitelist)) { |
|
av_log(dst, AV_LOG_ERROR, "Failed to duplicate whitelist\n"); |
|
return AVERROR(ENOMEM); |
|
} |
|
return 0; |
|
} |
|
|
|
static const AVCodec *find_decoder(AVFormatContext *s, AVStream *st, enum AVCodecID codec_id) |
|
{ |
|
if (st->codec->codec) |
|
return st->codec->codec; |
|
|
|
switch (st->codec->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
if (s->video_codec) return s->video_codec; |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
if (s->audio_codec) return s->audio_codec; |
|
break; |
|
case AVMEDIA_TYPE_SUBTITLE: |
|
if (s->subtitle_codec) return s->subtitle_codec; |
|
break; |
|
} |
|
|
|
return avcodec_find_decoder(codec_id); |
|
} |
|
|
|
int av_format_get_probe_score(const AVFormatContext *s) |
|
{ |
|
return s->probe_score; |
|
} |
|
|
|
/* an arbitrarily chosen "sane" max packet size -- 50M */ |
|
#define SANE_CHUNK_SIZE (50000000) |
|
|
|
int ffio_limit(AVIOContext *s, int size) |
|
{ |
|
if (s->maxsize>= 0) { |
|
int64_t remaining= s->maxsize - avio_tell(s); |
|
if (remaining < size) { |
|
int64_t newsize = avio_size(s); |
|
if (!s->maxsize || s->maxsize<newsize) |
|
s->maxsize = newsize - !newsize; |
|
remaining= s->maxsize - avio_tell(s); |
|
remaining= FFMAX(remaining, 0); |
|
} |
|
|
|
if (s->maxsize>= 0 && remaining+1 < size) { |
|
av_log(NULL, remaining ? AV_LOG_ERROR : AV_LOG_DEBUG, "Truncating packet of size %d to %"PRId64"\n", size, remaining+1); |
|
size = remaining+1; |
|
} |
|
} |
|
return size; |
|
} |
|
|
|
/* Read the data in sane-sized chunks and append to pkt. |
|
* Return the number of bytes read or an error. */ |
|
static int append_packet_chunked(AVIOContext *s, AVPacket *pkt, int size) |
|
{ |
|
int64_t orig_pos = pkt->pos; // av_grow_packet might reset pos |
|
int orig_size = pkt->size; |
|
int ret; |
|
|
|
do { |
|
int prev_size = pkt->size; |
|
int read_size; |
|
|
|
/* When the caller requests a lot of data, limit it to the amount |
|
* left in file or SANE_CHUNK_SIZE when it is not known. */ |
|
read_size = size; |
|
if (read_size > SANE_CHUNK_SIZE/10) { |
|
read_size = ffio_limit(s, read_size); |
|
// If filesize/maxsize is unknown, limit to SANE_CHUNK_SIZE |
|
if (s->maxsize < 0) |
|
read_size = FFMIN(read_size, SANE_CHUNK_SIZE); |
|
} |
|
|
|
ret = av_grow_packet(pkt, read_size); |
|
if (ret < 0) |
|
break; |
|
|
|
ret = avio_read(s, pkt->data + prev_size, read_size); |
|
if (ret != read_size) { |
|
av_shrink_packet(pkt, prev_size + FFMAX(ret, 0)); |
|
break; |
|
} |
|
|
|
size -= read_size; |
|
} while (size > 0); |
|
if (size > 0) |
|
pkt->flags |= AV_PKT_FLAG_CORRUPT; |
|
|
|
pkt->pos = orig_pos; |
|
if (!pkt->size) |
|
av_free_packet(pkt); |
|
return pkt->size > orig_size ? pkt->size - orig_size : ret; |
|
} |
|
|
|
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size) |
|
{ |
|
av_init_packet(pkt); |
|
pkt->data = NULL; |
|
pkt->size = 0; |
|
pkt->pos = avio_tell(s); |
|
|
|
return append_packet_chunked(s, pkt, size); |
|
} |
|
|
|
int av_append_packet(AVIOContext *s, AVPacket *pkt, int size) |
|
{ |
|
if (!pkt->size) |
|
return av_get_packet(s, pkt, size); |
|
return append_packet_chunked(s, pkt, size); |
|
} |
|
|
|
int av_filename_number_test(const char *filename) |
|
{ |
|
char buf[1024]; |
|
return filename && |
|
(av_get_frame_filename(buf, sizeof(buf), filename, 1) >= 0); |
|
} |
|
|
|
static int set_codec_from_probe_data(AVFormatContext *s, AVStream *st, |
|
AVProbeData *pd) |
|
{ |
|
static const struct { |
|
const char *name; |
|
enum AVCodecID id; |
|
enum AVMediaType type; |
|
} fmt_id_type[] = { |
|
{ "aac", AV_CODEC_ID_AAC, AVMEDIA_TYPE_AUDIO }, |
|
{ "ac3", AV_CODEC_ID_AC3, AVMEDIA_TYPE_AUDIO }, |
|
{ "dts", AV_CODEC_ID_DTS, AVMEDIA_TYPE_AUDIO }, |
|
{ "dvbsub", AV_CODEC_ID_DVB_SUBTITLE,AVMEDIA_TYPE_SUBTITLE }, |
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{ "eac3", AV_CODEC_ID_EAC3, AVMEDIA_TYPE_AUDIO }, |
|
{ "h264", AV_CODEC_ID_H264, AVMEDIA_TYPE_VIDEO }, |
|
{ "hevc", AV_CODEC_ID_HEVC, AVMEDIA_TYPE_VIDEO }, |
|
{ "loas", AV_CODEC_ID_AAC_LATM, AVMEDIA_TYPE_AUDIO }, |
|
{ "m4v", AV_CODEC_ID_MPEG4, AVMEDIA_TYPE_VIDEO }, |
|
{ "mp3", AV_CODEC_ID_MP3, AVMEDIA_TYPE_AUDIO }, |
|
{ "mpegvideo", AV_CODEC_ID_MPEG2VIDEO, AVMEDIA_TYPE_VIDEO }, |
|
{ 0 } |
|
}; |
|
int score; |
|
AVInputFormat *fmt = av_probe_input_format3(pd, 1, &score); |
|
|
|
if (fmt && st->request_probe <= score) { |
|
int i; |
|
av_log(s, AV_LOG_DEBUG, |
|
"Probe with size=%d, packets=%d detected %s with score=%d\n", |
|
pd->buf_size, MAX_PROBE_PACKETS - st->probe_packets, |
|
fmt->name, score); |
|
for (i = 0; fmt_id_type[i].name; i++) { |
|
if (!strcmp(fmt->name, fmt_id_type[i].name)) { |
|
st->codec->codec_id = fmt_id_type[i].id; |
|
st->codec->codec_type = fmt_id_type[i].type; |
|
return score; |
|
} |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
/************************************************************/ |
|
/* input media file */ |
|
|
|
int av_demuxer_open(AVFormatContext *ic) { |
|
int err; |
|
|
|
if (ic->format_whitelist && av_match_list(ic->iformat->name, ic->format_whitelist, ',') <= 0) { |
|
av_log(ic, AV_LOG_ERROR, "Format not on whitelist\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
if (ic->iformat->read_header) { |
|
err = ic->iformat->read_header(ic); |
|
if (err < 0) |
|
return err; |
|
} |
|
|
|
if (ic->pb && !ic->data_offset) |
|
ic->data_offset = avio_tell(ic->pb); |
|
|
|
return 0; |
|
} |
|
|
|
/* 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_buffer2(s->pb, &s->iformat, filename, |
|
s, 0, s->format_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 score; |
|
|
|
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_buffer2(s->pb, &s->iformat, filename, |
|
s, 0, s->format_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; |
|
} |
|
|
|
int 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; |
|
if (copy.size <= 0) { |
|
av_log(s, AV_LOG_WARNING, |
|
"Attached picture on stream %d has invalid size, " |
|
"ignoring\n", i); |
|
continue; |
|
} |
|
copy.buf = av_buffer_ref(copy.buf); |
|
if (!copy.buf) |
|
return AVERROR(ENOMEM); |
|
|
|
add_to_pktbuf(&s->raw_packet_buffer, ©, |
|
&s->raw_packet_buffer_end); |
|
} |
|
return 0; |
|
} |
|
|
|
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(NULL, 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; |
|
s->probe_score = ret; |
|
|
|
if (s->format_whitelist && av_match_list(s->iformat->name, s->format_whitelist, ',') <= 0) { |
|
av_log(s, AV_LOG_ERROR, "Format not on whitelist\n"); |
|
ret = AVERROR(EINVAL); |
|
goto fail; |
|
} |
|
|
|
avio_skip(s->pb, s->skip_initial_bytes); |
|
|
|
/* 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, 0); |
|
|
|
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") || !strcmp(s->iformat->name, "aac") || |
|
!strcmp(s->iformat->name, "tta")) { |
|
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); |
|
|
|
if ((ret = avformat_queue_attached_pictures(s)) < 0) |
|
goto fail; |
|
|
|
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 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; |
|
} |
|
} |
|
|
|
static int 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) { |
|
av_log(s, AV_LOG_WARNING, |
|
"Failed to reallocate probe buffer for stream %d\n", |
|
st->index); |
|
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_STREAM_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); |
|
} |
|
force_codec_ids(s, st); |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static int update_wrap_reference(AVFormatContext *s, AVStream *st, int stream_index, AVPacket *pkt) |
|
{ |
|
int64_t ref = pkt->dts; |
|
int i, pts_wrap_behavior; |
|
int64_t pts_wrap_reference; |
|
AVProgram *first_program; |
|
|
|
if (ref == AV_NOPTS_VALUE) |
|
ref = pkt->pts; |
|
if (st->pts_wrap_reference != AV_NOPTS_VALUE || st->pts_wrap_bits >= 63 || ref == AV_NOPTS_VALUE || !s->correct_ts_overflow) |
|
return 0; |
|
ref &= (1LL << st->pts_wrap_bits)-1; |
|
|
|
// reference time stamp should be 60 s before first time stamp |
|
pts_wrap_reference = ref - av_rescale(60, st->time_base.den, st->time_base.num); |
|
// if first time stamp is not more than 1/8 and 60s before the wrap point, subtract rather than add wrap offset |
|
pts_wrap_behavior = (ref < (1LL << st->pts_wrap_bits) - (1LL << st->pts_wrap_bits-3)) || |
|
(ref < (1LL << st->pts_wrap_bits) - av_rescale(60, st->time_base.den, st->time_base.num)) ? |
|
AV_PTS_WRAP_ADD_OFFSET : AV_PTS_WRAP_SUB_OFFSET; |
|
|
|
first_program = av_find_program_from_stream(s, NULL, stream_index); |
|
|
|
if (!first_program) { |
|
int default_stream_index = av_find_default_stream_index(s); |
|
if (s->streams[default_stream_index]->pts_wrap_reference == AV_NOPTS_VALUE) { |
|
for (i = 0; i < s->nb_streams; i++) { |
|
if (av_find_program_from_stream(s, NULL, i)) |
|
continue; |
|
s->streams[i]->pts_wrap_reference = pts_wrap_reference; |
|
s->streams[i]->pts_wrap_behavior = pts_wrap_behavior; |
|
} |
|
} |
|
else { |
|
st->pts_wrap_reference = s->streams[default_stream_index]->pts_wrap_reference; |
|
st->pts_wrap_behavior = s->streams[default_stream_index]->pts_wrap_behavior; |
|
} |
|
} |
|
else { |
|
AVProgram *program = first_program; |
|
while (program) { |
|
if (program->pts_wrap_reference != AV_NOPTS_VALUE) { |
|
pts_wrap_reference = program->pts_wrap_reference; |
|
pts_wrap_behavior = program->pts_wrap_behavior; |
|
break; |
|
} |
|
program = av_find_program_from_stream(s, program, stream_index); |
|
} |
|
|
|
// update every program with differing pts_wrap_reference |
|
program = first_program; |
|
while (program) { |
|
if (program->pts_wrap_reference != pts_wrap_reference) { |
|
for (i = 0; i<program->nb_stream_indexes; i++) { |
|
s->streams[program->stream_index[i]]->pts_wrap_reference = pts_wrap_reference; |
|
s->streams[program->stream_index[i]]->pts_wrap_behavior = pts_wrap_behavior; |
|
} |
|
|
|
program->pts_wrap_reference = pts_wrap_reference; |
|
program->pts_wrap_behavior = pts_wrap_behavior; |
|
} |
|
program = av_find_program_from_stream(s, program, stream_index); |
|
} |
|
} |
|
return 1; |
|
} |
|
|
|
int ff_read_packet(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
int ret, i, err; |
|
AVStream *st; |
|
|
|
for (;;) { |
|
AVPacketList *pktl = s->raw_packet_buffer; |
|
|
|
if (pktl) { |
|
*pkt = pktl->pkt; |
|
st = s->streams[pkt->stream_index]; |
|
if (s->raw_packet_buffer_remaining_size <= 0) |
|
if ((err = probe_codec(s, st, NULL)) < 0) |
|
return err; |
|
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) |
|
if ((err = probe_codec(s, st, NULL)) < 0) |
|
return err; |
|
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 (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]; |
|
|
|
if (update_wrap_reference(s, st, pkt->stream_index, pkt) && st->pts_wrap_behavior == AV_PTS_WRAP_SUB_OFFSET) { |
|
// correct first time stamps to negative values |
|
if (!is_relative(st->first_dts)) |
|
st->first_dts = wrap_timestamp(st, st->first_dts); |
|
if (!is_relative(st->start_time)) |
|
st->start_time = wrap_timestamp(st, st->start_time); |
|
if (!is_relative(st->cur_dts)) |
|
st->cur_dts = wrap_timestamp(st, st->cur_dts); |
|
} |
|
|
|
pkt->dts = wrap_timestamp(st, pkt->dts); |
|
pkt->pts = wrap_timestamp(st, pkt->pts); |
|
|
|
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; |
|
|
|
if ((err = probe_codec(s, st, pkt)) < 0) |
|
return err; |
|
} |
|
} |
|
|
|
|
|
/**********************************************************/ |
|
|
|
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; |
|
} |
|
|
|
/** |
|
* Return the frame duration in seconds. Return 0 if not available. |
|
*/ |
|
void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStream *st, |
|
AVCodecParserContext *pc, AVPacket *pkt) |
|
{ |
|
AVRational codec_framerate = s->iformat ? st->codec->framerate : |
|
av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame}); |
|
int frame_size; |
|
|
|
*pnum = 0; |
|
*pden = 0; |
|
switch (st->codec->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
if (st->r_frame_rate.num && !pc && s->iformat) { |
|
*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 (codec_framerate.den * 1000LL > codec_framerate.num) { |
|
av_assert0(st->codec->ticks_per_frame); |
|
av_reduce(pnum, pden, |
|
codec_framerate.den, |
|
codec_framerate.num * (int64_t)st->codec->ticks_per_frame, |
|
INT_MAX); |
|
|
|
if (pc && pc->repeat_pict) { |
|
av_assert0(s->iformat); // this may be wrong for interlaced encoding but its not used for that case |
|
av_reduce(pnum, pden, |
|
(*pnum) * (1LL + pc->repeat_pict), |
|
(*pden), |
|
INT_MAX); |
|
} |
|
/* 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 = av_get_audio_frame_duration(st->codec, pkt->size); |
|
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 won't 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->packet_buffer_end) |
|
return s->parse_queue; |
|
return NULL; |
|
} |
|
|
|
static int64_t select_from_pts_buffer(AVStream *st, int64_t *pts_buffer, int64_t dts) { |
|
int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 && |
|
st->codec->codec_id != AV_CODEC_ID_HEVC; |
|
|
|
if(!onein_oneout) { |
|
int delay = st->codec->has_b_frames; |
|
int i; |
|
|
|
if (dts == AV_NOPTS_VALUE) { |
|
int64_t best_score = INT64_MAX; |
|
for (i = 0; i<delay; i++) { |
|
if (st->pts_reorder_error_count[i]) { |
|
int64_t score = st->pts_reorder_error[i] / st->pts_reorder_error_count[i]; |
|
if (score < best_score) { |
|
best_score = score; |
|
dts = pts_buffer[i]; |
|
} |
|
} |
|
} |
|
} else { |
|
for (i = 0; i<delay; i++) { |
|
if (pts_buffer[i] != AV_NOPTS_VALUE) { |
|
int64_t diff = FFABS(pts_buffer[i] - dts) |
|
+ (uint64_t)st->pts_reorder_error[i]; |
|
diff = FFMAX(diff, st->pts_reorder_error[i]); |
|
st->pts_reorder_error[i] = diff; |
|
st->pts_reorder_error_count[i]++; |
|
if (st->pts_reorder_error_count[i] > 250) { |
|
st->pts_reorder_error[i] >>= 1; |
|
st->pts_reorder_error_count[i] >>= 1; |
|
} |
|
} |
|
} |
|
} |
|
} |
|
|
|
if (dts == AV_NOPTS_VALUE) |
|
dts = pts_buffer[0]; |
|
|
|
return dts; |
|
} |
|
|
|
static void update_initial_timestamps(AVFormatContext *s, int stream_index, |
|
int64_t dts, int64_t pts, AVPacket *pkt) |
|
{ |
|
AVStream *st = s->streams[stream_index]; |
|
AVPacketList *pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; |
|
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]); |
|
|
|
pktl->pkt.dts = select_from_pts_buffer(st, pts_buffer, pktl->pkt.dts); |
|
} |
|
} |
|
|
|
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->packet_buffer ? s->packet_buffer : s->parse_queue; |
|
int64_t cur_dts = RELATIVE_TS_BASE; |
|
|
|
if (st->first_dts != AV_NOPTS_VALUE) { |
|
if (st->update_initial_durations_done) |
|
return; |
|
st->update_initial_durations_done = 1; |
|
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 (pts %s, duration %d) in the queue\n", |
|
av_ts2str(st->first_dts), av_ts2str(pktl->pkt.dts), av_ts2str(pktl->pkt.pts), pktl->pkt.duration); |
|
return; |
|
} |
|
if (!pktl) { |
|
av_log(s, AV_LOG_DEBUG, "first_dts %s but no packet with dts in the queue\n", av_ts2str(st->first_dts)); |
|
return; |
|
} |
|
pktl = s->packet_buffer ? s->packet_buffer : s->parse_queue; |
|
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, |
|
int64_t next_dts, int64_t next_pts) |
|
{ |
|
int num, den, presentation_delayed, delay, i; |
|
int64_t offset; |
|
AVRational duration; |
|
int onein_oneout = st->codec->codec_id != AV_CODEC_ID_H264 && |
|
st->codec->codec_id != AV_CODEC_ID_HEVC; |
|
|
|
if (s->flags & AVFMT_FLAG_NOFILLIN) |
|
return; |
|
|
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && pkt->dts != AV_NOPTS_VALUE) { |
|
if (pkt->dts == pkt->pts && st->last_dts_for_order_check != AV_NOPTS_VALUE) { |
|
if (st->last_dts_for_order_check <= pkt->dts) { |
|
st->dts_ordered++; |
|
} else { |
|
av_log(s, st->dts_misordered ? AV_LOG_DEBUG : AV_LOG_WARNING, |
|
"DTS %"PRIi64" < %"PRIi64" out of order\n", |
|
pkt->dts, |
|
st->last_dts_for_order_check); |
|
st->dts_misordered++; |
|
} |
|
if (st->dts_ordered + st->dts_misordered > 250) { |
|
st->dts_ordered >>= 1; |
|
st->dts_misordered >>= 1; |
|
} |
|
} |
|
|
|
st->last_dts_for_order_check = pkt->dts; |
|
if (st->dts_ordered < 8*st->dts_misordered && pkt->dts == pkt->pts) |
|
pkt->dts = AV_NOPTS_VALUE; |
|
} |
|
|
|
if ((s->flags & AVFMT_FLAG_IGNDTS) && pkt->pts != AV_NOPTS_VALUE) |
|
pkt->dts = AV_NOPTS_VALUE; |
|
|
|
if (pc && pc->pict_type == AV_PICTURE_TYPE_B |
|
&& !st->codec->has_b_frames) |
|
//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 MPEG-2 in MPEG-PS lack dts (issue #171 / input_file.mpg). |
|
* We take the conservative approach and discard both. |
|
* Note: If this is misbehaving for an 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") |
|
&& strcmp(s->iformat->name, "flv")) // otherwise we discard correct timestamps for vc1-wmapro.ism |
|
pkt->dts = AV_NOPTS_VALUE; |
|
} |
|
|
|
duration = av_mul_q((AVRational) {pkt->duration, 1}, st->time_base); |
|
if (pkt->duration == 0) { |
|
ff_compute_frame_duration(s, &num, &den, st, pc, pkt); |
|
if (den && num) { |
|
duration = (AVRational) {num, den}; |
|
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; |
|
} |
|
|
|
/* 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 delay:%d onein_oneout:%d\n", |
|
presentation_delayed, av_ts2str(pkt->pts), av_ts2str(pkt->dts), av_ts2str(st->cur_dts), |
|
pkt->stream_index, pc, pkt->duration, delay, onein_oneout); |
|
/* 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)) && |
|
onein_oneout) { |
|
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, pkt); |
|
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; |
|
if (pkt->dts != AV_NOPTS_VALUE && |
|
pkt->pts == AV_NOPTS_VALUE && |
|
st->last_IP_duration > 0 && |
|
((uint64_t)st->cur_dts - (uint64_t)next_dts + 1) <= 2 && |
|
next_dts != next_pts && |
|
next_pts != AV_NOPTS_VALUE) |
|
pkt->pts = next_dts; |
|
|
|
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 ) { |
|
|
|
/* 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, pkt); |
|
if (pkt->pts == AV_NOPTS_VALUE) |
|
pkt->pts = st->cur_dts; |
|
pkt->dts = pkt->pts; |
|
if (pkt->pts != AV_NOPTS_VALUE) |
|
st->cur_dts = av_add_stable(st->time_base, pkt->pts, duration, 1); |
|
} |
|
} |
|
|
|
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]); |
|
|
|
pkt->dts = select_from_pts_buffer(st, st->pts_buffer, pkt->dts); |
|
} |
|
// We skipped it above so we try here. |
|
if (!onein_oneout) |
|
// This should happen on the first packet |
|
update_initial_timestamps(s, pkt->stream_index, pkt->dts, pkt->pts, pkt); |
|
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, AV_NOPTS_VALUE, AV_NOPTS_VALUE); |
|
} |
|
|
|
while (size > 0 || (pkt == &flush_pkt && got_output)) { |
|
int len; |
|
int64_t next_pts = pkt->pts; |
|
int64_t next_dts = pkt->dts; |
|
|
|
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; |
|
|
|
if (pkt->side_data) { |
|
out_pkt.side_data = pkt->side_data; |
|
out_pkt.side_data_elems = pkt->side_data_elems; |
|
pkt->side_data = NULL; |
|
pkt->side_data_elems = 0; |
|
} |
|
|
|
/* 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); |
|
} |
|
} |
|
|
|
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, next_dts, next_pts); |
|
|
|
if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) { |
|
out_pkt.buf = pkt->buf; |
|
pkt->buf = NULL; |
|
#if FF_API_DESTRUCT_PACKET |
|
FF_DISABLE_DEPRECATION_WARNINGS |
|
out_pkt.destruct = pkt->destruct; |
|
pkt->destruct = NULL; |
|
FF_ENABLE_DEPRECATION_WARNINGS |
|
#endif |
|
} |
|
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 int64_t ts_to_samples(AVStream *st, int64_t ts) |
|
{ |
|
return av_rescale(ts, st->time_base.num * st->codec->sample_rate, st->time_base.den); |
|
} |
|
|
|
static int read_frame_internal(AVFormatContext *s, AVPacket *pkt) |
|
{ |
|
int ret = 0, i, got_packet = 0; |
|
AVDictionary *metadata = NULL; |
|
|
|
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, AV_NOPTS_VALUE, AV_NOPTS_VALUE); |
|
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); |
|
if (got_packet) { |
|
*pkt = 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 (ret >= 0) { |
|
AVStream *st = s->streams[pkt->stream_index]; |
|
int discard_padding = 0; |
|
if (st->first_discard_sample && pkt->pts != AV_NOPTS_VALUE) { |
|
int64_t pts = pkt->pts - (is_relative(pkt->pts) ? RELATIVE_TS_BASE : 0); |
|
int64_t sample = ts_to_samples(st, pts); |
|
int duration = ts_to_samples(st, pkt->duration); |
|
int64_t end_sample = sample + duration; |
|
if (duration > 0 && end_sample >= st->first_discard_sample && |
|
sample < st->last_discard_sample) |
|
discard_padding = FFMIN(end_sample - st->first_discard_sample, duration); |
|
} |
|
if (st->skip_samples || discard_padding) { |
|
uint8_t *p = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10); |
|
if (p) { |
|
AV_WL32(p, st->skip_samples); |
|
AV_WL32(p + 4, discard_padding); |
|
av_log(s, AV_LOG_DEBUG, "demuxer injecting skip %d\n", st->skip_samples); |
|
} |
|
st->skip_samples = 0; |
|
} |
|
|
|
if (st->inject_global_side_data) { |
|
for (i = 0; i < st->nb_side_data; i++) { |
|
AVPacketSideData *src_sd = &st->side_data[i]; |
|
uint8_t *dst_data; |
|
|
|
if (av_packet_get_side_data(pkt, src_sd->type, NULL)) |
|
continue; |
|
|
|
dst_data = av_packet_new_side_data(pkt, src_sd->type, src_sd->size); |
|
if (!dst_data) { |
|
av_log(s, AV_LOG_WARNING, "Could not inject global side data\n"); |
|
continue; |
|
} |
|
|
|
memcpy(dst_data, src_sd->data, src_sd->size); |
|
} |
|
st->inject_global_side_data = 0; |
|
} |
|
|
|
if (!(s->flags & AVFMT_FLAG_KEEP_SIDE_DATA)) |
|
av_packet_merge_side_data(pkt); |
|
} |
|
|
|
av_opt_get_dict_val(s, "metadata", AV_OPT_SEARCH_CHILDREN, &metadata); |
|
if (metadata) { |
|
s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED; |
|
av_dict_copy(&s->metadata, metadata, 0); |
|
av_dict_free(&metadata); |
|
av_opt_set_dict_val(s, "metadata", NULL, AV_OPT_SEARCH_CHILDREN); |
|
} |
|
|
|
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 */ |
|
st = s->streams[next_pkt->stream_index]; |
|
if (!(next_pkt->pts == AV_NOPTS_VALUE && st->discard < AVDISCARD_ALL && |
|
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 ((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 i; |
|
AVStream *st; |
|
int best_stream = 0; |
|
int best_score = -1; |
|
|
|
if (s->nb_streams <= 0) |
|
return -1; |
|
for (i = 0; i < s->nb_streams; i++) { |
|
int score = 0; |
|
st = s->streams[i]; |
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
|
!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) { |
|
if (!st->codec->width && !st->codec->height && !st->codec_info_nb_frames) |
|
score += 25; |
|
else |
|
score += 100; |
|
} |
|
if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO) { |
|
if (!st->codec->sample_rate && !st->codec_info_nb_frames) |
|
score += 12; |
|
else |
|
score += 50; |
|
} |
|
|
|
if (score > best_score) { |
|
best_score = score; |
|
best_stream = i; |
|
} |
|
} |
|
return best_stream; |
|
} |
|
|
|
/** Flush the frame reader. */ |
|
void ff_read_frame_flush(AVFormatContext *s) |
|
{ |
|
AVStream *st; |
|
int i, j; |
|
|
|
flush_packet_queue(s); |
|
|
|
/* Reset read state for each stream. */ |
|
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; |
|
st->last_dts_for_order_check = AV_NOPTS_VALUE; |
|
if (st->first_dts == AV_NOPTS_VALUE) |
|
st->cur_dts = RELATIVE_TS_BASE; |
|
else |
|
/* We set the current DTS to an unspecified origin. */ |
|
st->cur_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; |
|
|
|
if (s->internal->inject_global_side_data) |
|
st->inject_global_side_data = 1; |
|
} |
|
} |
|
|
|
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 (size < 0 || size > 0x3FFFFFFF) |
|
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]; |
|
av_assert0(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) |
|
{ |
|
timestamp = wrap_timestamp(st, timestamp); |
|
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); |
|
} |
|
|
|
static int64_t ff_read_timestamp(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit, |
|
int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) |
|
{ |
|
int64_t ts = read_timestamp(s, stream_index, ppos, pos_limit); |
|
if (stream_index >= 0) |
|
ts = wrap_timestamp(s->streams[stream_index], ts); |
|
return ts; |
|
} |
|
|
|
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; |
|
|
|
/* FIXME: Whole function must be checked for non-keyframe entries in |
|
* index case, especially read_timestamp(). */ |
|
index = av_index_search_timestamp(st, target_ts, |
|
flags | AVSEEK_FLAG_BACKWARD); |
|
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 { |
|
av_assert1(index == 0); |
|
} |
|
|
|
index = av_index_search_timestamp(st, target_ts, |
|
flags & ~AVSEEK_FLAG_BACKWARD); |
|
av_assert0(index < st->nb_index_entries); |
|
if (index >= 0) { |
|
e = &st->index_entries[index]; |
|
av_assert1(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; |
|
} |
|
|
|
int ff_find_last_ts(AVFormatContext *s, int stream_index, int64_t *ts, int64_t *pos, |
|
int64_t (*read_timestamp)(struct AVFormatContext *, int , int64_t *, int64_t )) |
|
{ |
|
int64_t step = 1024; |
|
int64_t limit, ts_max; |
|
int64_t filesize = avio_size(s->pb); |
|
int64_t pos_max = filesize - 1; |
|
do { |
|
limit = pos_max; |
|
pos_max = FFMAX(0, (pos_max) - step); |
|
ts_max = ff_read_timestamp(s, stream_index, |
|
&pos_max, limit, read_timestamp); |
|
step += step; |
|
} while (ts_max == AV_NOPTS_VALUE && 2*limit > step); |
|
if (ts_max == AV_NOPTS_VALUE) |
|
return -1; |
|
|
|
for (;;) { |
|
int64_t tmp_pos = pos_max + 1; |
|
int64_t tmp_ts = ff_read_timestamp(s, stream_index, |
|
&tmp_pos, INT64_MAX, read_timestamp); |
|
if (tmp_ts == AV_NOPTS_VALUE) |
|
break; |
|
av_assert0(tmp_pos > pos_max); |
|
ts_max = tmp_ts; |
|
pos_max = tmp_pos; |
|
if (tmp_pos >= filesize) |
|
break; |
|
} |
|
|
|
if (ts) |
|
*ts = ts_max; |
|
if (pos) |
|
*pos = pos_max; |
|
|
|
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; |
|
int no_change; |
|
int ret; |
|
|
|
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 = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); |
|
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) { |
|
if ((ret = ff_find_last_ts(s, stream_index, &ts_max, &pos_max, read_timestamp)) < 0) |
|
return ret; |
|
pos_limit = pos_max; |
|
} |
|
|
|
if (ts_max <= target_ts) { |
|
*ts_ret = ts_max; |
|
return pos_max; |
|
} |
|
|
|
av_assert0(ts_min < ts_max); |
|
|
|
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)); |
|
av_assert0(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 did not change min / 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; |
|
|
|
// May pass pos_limit instead of -1. |
|
ts = ff_read_timestamp(s, stream_index, &pos, INT64_MAX, read_timestamp); |
|
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; |
|
} |
|
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 = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); |
|
pos_min++; |
|
ts_max = ff_read_timestamp(s, stream_index, &pos_min, INT64_MAX, read_timestamp); |
|
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); |
|
|
|
s->io_repositioned = 1; |
|
|
|
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) { |
|
av_assert0(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; |
|
|
|
if (s->iformat->read_seek2 && !s->iformat->read_seek) { |
|
int64_t min_ts = INT64_MIN, max_ts = INT64_MAX; |
|
if ((flags & AVSEEK_FLAG_BACKWARD)) |
|
max_ts = timestamp; |
|
else |
|
min_ts = timestamp; |
|
return avformat_seek_file(s, stream_index, min_ts, timestamp, max_ts, |
|
flags & ~AVSEEK_FLAG_BACKWARD); |
|
} |
|
|
|
ret = seek_frame_internal(s, stream_index, timestamp, flags); |
|
|
|
if (ret >= 0) |
|
ret = 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 (stream_index < -1 || stream_index >= (int)s->nb_streams) |
|
return AVERROR(EINVAL); |
|
|
|
if (s->seek2any>0) |
|
flags |= AVSEEK_FLAG_ANY; |
|
flags &= ~AVSEEK_FLAG_BACKWARD; |
|
|
|
if (s->iformat->read_seek2) { |
|
int ret; |
|
ff_read_frame_flush(s); |
|
|
|
if (stream_index == -1 && s->nb_streams == 1) { |
|
AVRational time_base = s->streams[0]->time_base; |
|
ts = av_rescale_q(ts, AV_TIME_BASE_Q, time_base); |
|
min_ts = av_rescale_rnd(min_ts, time_base.den, |
|
time_base.num * (int64_t)AV_TIME_BASE, |
|
AV_ROUND_UP | AV_ROUND_PASS_MINMAX); |
|
max_ts = av_rescale_rnd(max_ts, time_base.den, |
|
time_base.num * (int64_t)AV_TIME_BASE, |
|
AV_ROUND_DOWN | AV_ROUND_PASS_MINMAX); |
|
} |
|
|
|
ret = s->iformat->read_seek2(s, stream_index, min_ts, |
|
ts, max_ts, flags); |
|
|
|
if (ret >= 0) |
|
ret = avformat_queue_attached_pictures(s); |
|
return ret; |
|
} |
|
|
|
if (s->iformat->read_timestamp) { |
|
// try to seek via read_timestamp() |
|
} |
|
|
|
// Fall back on old API if new is not implemented but old is. |
|
// Note the old API 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 -1; //unreachable |
|
} |
|
|
|
/*******************************************************/ |
|
|
|
/** |
|
* 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 */ |
|
double bitrate = (double) filesize * 8.0 * AV_TIME_BASE / |
|
(double) ic->duration; |
|
if (bitrate >= 0 && bitrate <= INT_MAX) |
|
ic->bit_rate = bitrate; |
|
} |
|
} |
|
|
|
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 i, show_warning = 0; |
|
AVStream *st; |
|
|
|
/* if bit_rate is already set, we believe it */ |
|
if (ic->bit_rate <= 0) { |
|
int bit_rate = 0; |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (st->codec->bit_rate > 0) { |
|
if (INT_MAX - st->codec->bit_rate < bit_rate) { |
|
bit_rate = 0; |
|
break; |
|
} |
|
bit_rate += st->codec->bit_rate; |
|
} else if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->codec_info_nb_frames > 1) { |
|
// If we have a videostream with packets but without a bitrate |
|
// then consider the sum not known |
|
bit_rate = 0; |
|
break; |
|
} |
|
} |
|
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 > ic->data_offset) { |
|
filesize -= ic->data_offset; |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if ( st->time_base.num <= INT64_MAX / ic->bit_rate |
|
&& st->duration == AV_NOPTS_VALUE) { |
|
duration = av_rescale(8 * filesize, st->time_base.den, |
|
ic->bit_rate * |
|
(int64_t) st->time_base.num); |
|
st->duration = duration; |
|
show_warning = 1; |
|
} |
|
} |
|
} |
|
} |
|
if (show_warning) |
|
av_log(ic, AV_LOG_WARNING, |
|
"Estimating duration from bitrate, this may be inaccurate\n"); |
|
} |
|
|
|
#define DURATION_MAX_READ_SIZE 250000LL |
|
#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 num, den, read_size, i, ret; |
|
int found_duration = 0; |
|
int is_end; |
|
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 && |
|
st->codec->codec_type != AVMEDIA_TYPE_UNKNOWN) |
|
av_log(st->codec, AV_LOG_WARNING, |
|
"start time for stream %d is not set in estimate_timings_from_pts\n", i); |
|
|
|
if (st->parser) { |
|
av_parser_close(st->parser); |
|
st->parser = NULL; |
|
} |
|
} |
|
|
|
av_opt_set(ic, "skip_changes", "1", AV_OPT_SEARCH_CHILDREN); |
|
/* estimate the end time (duration) */ |
|
/* XXX: may need to support wrapping */ |
|
filesize = ic->pb ? avio_size(ic->pb) : 0; |
|
do { |
|
is_end = found_duration; |
|
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)) { |
|
if (pkt->duration == 0) { |
|
ff_compute_frame_duration(ic, &num, &den, st, st->parser, 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); |
|
} |
|
} |
|
duration = pkt->pts + pkt->duration; |
|
found_duration = 1; |
|
if (st->start_time != AV_NOPTS_VALUE) |
|
duration -= st->start_time; |
|
else |
|
duration -= st->first_dts; |
|
if (duration > 0) { |
|
if (st->duration == AV_NOPTS_VALUE || st->info->last_duration<= 0 || |
|
(st->duration < duration && FFABS(duration - st->info->last_duration) < 60LL*st->time_base.den / st->time_base.num)) |
|
st->duration = duration; |
|
st->info->last_duration = duration; |
|
} |
|
} |
|
av_free_packet(pkt); |
|
} |
|
|
|
/* check if all audio/video streams have valid duration */ |
|
if (!is_end) { |
|
is_end = 1; |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
switch (st->codec->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
case AVMEDIA_TYPE_AUDIO: |
|
if (st->duration == AV_NOPTS_VALUE) |
|
is_end = 0; |
|
} |
|
} |
|
} |
|
} while (!is_end && |
|
offset && |
|
++retry <= DURATION_MAX_RETRY); |
|
|
|
av_opt_set(ic, "skip_changes", "0", AV_OPT_SEARCH_CHILDREN); |
|
|
|
/* warn about audio/video streams which duration could not be estimated */ |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (st->duration == AV_NOPTS_VALUE) { |
|
switch (st->codec->codec_type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
case AVMEDIA_TYPE_AUDIO: |
|
if (st->start_time != AV_NOPTS_VALUE || st->first_dts != AV_NOPTS_VALUE) { |
|
av_log(ic, AV_LOG_DEBUG, "stream %d : no PTS found at end of file, duration not set\n", i); |
|
} else |
|
av_log(ic, AV_LOG_DEBUG, "stream %d : no TS found at start of file, duration not set\n", i); |
|
} |
|
} |
|
} |
|
fill_all_stream_timings(ic); |
|
|
|
avio_seek(ic->pb, old_offset, SEEK_SET); |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
int j; |
|
|
|
st = ic->streams[i]; |
|
st->cur_dts = st->first_dts; |
|
st->last_IP_pts = AV_NOPTS_VALUE; |
|
st->last_dts_for_order_check = AV_NOPTS_VALUE; |
|
for (j = 0; j < MAX_REORDER_DELAY + 1; j++) |
|
st->pts_buffer[j] = 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 { |
|
/* 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) |
|
|
|
if ( avctx->codec_id == AV_CODEC_ID_NONE |
|
&& avctx->codec_type != AVMEDIA_TYPE_DATA) |
|
FAIL("unknown codec"); |
|
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"); |
|
if (st->codec->codec_id == AV_CODEC_ID_RV30 || st->codec->codec_id == AV_CODEC_ID_RV40) |
|
if (!st->sample_aspect_ratio.num && !st->codec->sample_aspect_ratio.num && !st->codec_info_nb_frames) |
|
FAIL("no frame in rv30/40 and no sar"); |
|
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; |
|
} |
|
|
|
return 1; |
|
} |
|
|
|
/* returns 1 or 0 if or if not decoded data was returned, or a negative error */ |
|
static int try_decode_frame(AVFormatContext *s, AVStream *st, AVPacket *avpkt, |
|
AVDictionary **options) |
|
{ |
|
const AVCodec *codec; |
|
int got_picture = 1, ret = 0; |
|
AVFrame *frame = av_frame_alloc(); |
|
AVSubtitle subtitle; |
|
AVPacket pkt = *avpkt; |
|
|
|
if (!frame) |
|
return AVERROR(ENOMEM); |
|
|
|
if (!avcodec_is_open(st->codec) && |
|
st->info->found_decoder <= 0 && |
|
(st->codec->codec_id != -st->info->found_decoder || !st->codec->codec_id)) { |
|
AVDictionary *thread_opt = NULL; |
|
|
|
codec = find_decoder(s, st, st->codec->codec_id); |
|
|
|
if (!codec) { |
|
st->info->found_decoder = -st->codec->codec_id; |
|
ret = -1; |
|
goto fail; |
|
} |
|
|
|
/* Force thread count to 1 since the H.264 decoder will not extract |
|
* SPS and PPS to extradata during multi-threaded decoding. */ |
|
av_dict_set(options ? options : &thread_opt, "threads", "1", 0); |
|
if (s->codec_whitelist) |
|
av_dict_set(options ? options : &thread_opt, "codec_whitelist", s->codec_whitelist, 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 = -st->codec->codec_id; |
|
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; |
|
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: |
|
av_frame_free(&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; |
|
} |
|
|
|
enum AVCodecID ff_get_pcm_codec_id(int bps, int flt, int be, int sflags) |
|
{ |
|
if (flt) { |
|
switch (bps) { |
|
case 32: |
|
return be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE; |
|
case 64: |
|
return be ? AV_CODEC_ID_PCM_F64BE : AV_CODEC_ID_PCM_F64LE; |
|
default: |
|
return AV_CODEC_ID_NONE; |
|
} |
|
} else { |
|
bps += 7; |
|
bps >>= 3; |
|
if (sflags & (1 << (bps - 1))) { |
|
switch (bps) { |
|
case 1: |
|
return AV_CODEC_ID_PCM_S8; |
|
case 2: |
|
return be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE; |
|
case 3: |
|
return be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE; |
|
case 4: |
|
return be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE; |
|
default: |
|
return AV_CODEC_ID_NONE; |
|
} |
|
} else { |
|
switch (bps) { |
|
case 1: |
|
return AV_CODEC_ID_PCM_U8; |
|
case 2: |
|
return be ? AV_CODEC_ID_PCM_U16BE : AV_CODEC_ID_PCM_U16LE; |
|
case 3: |
|
return be ? AV_CODEC_ID_PCM_U24BE : AV_CODEC_ID_PCM_U24LE; |
|
case 4: |
|
return be ? AV_CODEC_ID_PCM_U32BE : AV_CODEC_ID_PCM_U32LE; |
|
default: |
|
return AV_CODEC_ID_NONE; |
|
} |
|
} |
|
} |
|
} |
|
|
|
unsigned int av_codec_get_tag(const AVCodecTag *const *tags, enum AVCodecID id) |
|
{ |
|
unsigned int tag; |
|
if (!av_codec_get_tag2(tags, id, &tag)) |
|
return 0; |
|
return tag; |
|
} |
|
|
|
int av_codec_get_tag2(const AVCodecTag * const *tags, enum AVCodecID id, |
|
unsigned int *tag) |
|
{ |
|
int i; |
|
for (i = 0; tags && tags[i]; i++) { |
|
const AVCodecTag *codec_tags = tags[i]; |
|
while (codec_tags->id != AV_CODEC_ID_NONE) { |
|
if (codec_tags->id == id) { |
|
*tag = codec_tags->tag; |
|
return 1; |
|
} |
|
codec_tags++; |
|
} |
|
} |
|
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 < 30*12) |
|
return (i + 1) * 1001; |
|
i -= 30*12; |
|
|
|
if (i < 7) |
|
return ((const int[]) { 40, 48, 50, 60, 80, 120, 240})[i] * 1001 * 12; |
|
|
|
i -= 7; |
|
|
|
return ((const int[]) { 24, 30, 60, 12, 15, 48 })[i] * 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_GIF || |
|
c->codec_id == AV_CODEC_ID_H264) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
int ff_alloc_extradata(AVCodecContext *avctx, int size) |
|
{ |
|
int ret; |
|
|
|
if (size < 0 || size >= INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) { |
|
avctx->extradata = NULL; |
|
avctx->extradata_size = 0; |
|
return AVERROR(EINVAL); |
|
} |
|
avctx->extradata = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); |
|
if (avctx->extradata) { |
|
memset(avctx->extradata + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); |
|
avctx->extradata_size = size; |
|
ret = 0; |
|
} else { |
|
avctx->extradata_size = 0; |
|
ret = AVERROR(ENOMEM); |
|
} |
|
return ret; |
|
} |
|
|
|
int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size) |
|
{ |
|
int ret = ff_alloc_extradata(avctx, size); |
|
if (ret < 0) |
|
return ret; |
|
ret = avio_read(pb, avctx->extradata, size); |
|
if (ret != size) { |
|
av_freep(&avctx->extradata); |
|
avctx->extradata_size = 0; |
|
av_log(avctx, AV_LOG_ERROR, "Failed to read extradata of size %d\n", size); |
|
return ret < 0 ? ret : AVERROR_INVALIDDATA; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
int ff_rfps_add_frame(AVFormatContext *ic, AVStream *st, int64_t ts) |
|
{ |
|
int i, j; |
|
int64_t last = st->info->last_dts; |
|
|
|
if ( ts != AV_NOPTS_VALUE && last != AV_NOPTS_VALUE && ts > last |
|
&& ts - (uint64_t)last < INT64_MAX) { |
|
double dts = (is_relative(ts) ? ts - RELATIVE_TS_BASE : ts) * av_q2d(st->time_base); |
|
int64_t duration = ts - last; |
|
|
|
if (!st->info->duration_error) |
|
st->info->duration_error = av_mallocz(sizeof(st->info->duration_error[0])*2); |
|
if (!st->info->duration_error) |
|
return AVERROR(ENOMEM); |
|
|
|
// if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
|
// av_log(NULL, AV_LOG_ERROR, "%f\n", dts); |
|
for (i = 0; i<MAX_STD_TIMEBASES; i++) { |
|
if (st->info->duration_error[0][1][i] < 1e10) { |
|
int framerate = get_std_framerate(i); |
|
double sdts = dts*framerate/(1001*12); |
|
for (j= 0; j<2; j++) { |
|
int64_t ticks = llrint(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++; |
|
st->info->rfps_duration_sum += duration; |
|
|
|
if (st->info->duration_count % 10 == 0) { |
|
int n = st->info->duration_count; |
|
for (i = 0; i<MAX_STD_TIMEBASES; i++) { |
|
if (st->info->duration_error[0][1][i] < 1e10) { |
|
double a0 = st->info->duration_error[0][0][i] / n; |
|
double error0 = st->info->duration_error[0][1][i] / n - a0*a0; |
|
double a1 = st->info->duration_error[1][0][i] / n; |
|
double error1 = st->info->duration_error[1][1][i] / n - a1*a1; |
|
if (error0 > 0.04 && error1 > 0.04) { |
|
st->info->duration_error[0][1][i] = 2e10; |
|
st->info->duration_error[1][1][i] = 2e10; |
|
} |
|
} |
|
} |
|
} |
|
|
|
// ignore the first 4 values, they might have some random jitter |
|
if (st->info->duration_count > 3 && is_relative(ts) == is_relative(last)) |
|
st->info->duration_gcd = av_gcd(st->info->duration_gcd, duration); |
|
} |
|
if (ts != AV_NOPTS_VALUE) |
|
st->info->last_dts = ts; |
|
|
|
return 0; |
|
} |
|
|
|
void ff_rfps_calculate(AVFormatContext *ic) |
|
{ |
|
int i, j; |
|
|
|
for (i = 0; i < ic->nb_streams; i++) { |
|
AVStream *st = ic->streams[i]; |
|
|
|
if (st->codec->codec_type != AVMEDIA_TYPE_VIDEO) |
|
continue; |
|
// 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>1 && !st->r_frame_rate.num |
|
&& tb_unreliable(st->codec)) { |
|
int num = 0; |
|
double best_error= 0.01; |
|
AVRational ref_rate = st->r_frame_rate.num ? st->r_frame_rate : av_inv_q(st->time_base); |
|
|
|
for (j= 0; j<MAX_STD_TIMEBASES; 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; |
|
|
|
if (av_q2d(st->time_base) * st->info->rfps_duration_sum / st->info->duration_count < (1001*12.0 * 0.8)/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 && (!ref_rate.num || (double)num/(12*1001) < 1.01 * av_q2d(ref_rate))) |
|
av_reduce(&st->r_frame_rate.num, &st->r_frame_rate.den, num, 12*1001, INT_MAX); |
|
} |
|
if ( !st->avg_frame_rate.num |
|
&& st->r_frame_rate.num && st->info->rfps_duration_sum |
|
&& st->info->codec_info_duration <= 0 |
|
&& st->info->duration_count > 2 |
|
&& fabs(1.0 / (av_q2d(st->r_frame_rate) * av_q2d(st->time_base)) - st->info->rfps_duration_sum / (double)st->info->duration_count) <= 1.0 |
|
) { |
|
av_log(ic, AV_LOG_DEBUG, "Setting avg frame rate based on r frame rate\n"); |
|
st->avg_frame_rate = st->r_frame_rate; |
|
} |
|
|
|
av_freep(&st->info->duration_error); |
|
st->info->last_dts = AV_NOPTS_VALUE; |
|
st->info->duration_count = 0; |
|
st->info->rfps_duration_sum = 0; |
|
} |
|
} |
|
|
|
int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options) |
|
{ |
|
int i, count, ret = 0, j; |
|
int64_t read_size; |
|
AVStream *st; |
|
AVPacket pkt1, *pkt; |
|
int64_t old_offset = avio_tell(ic->pb); |
|
// new streams might appear, no options for those |
|
int orig_nb_streams = ic->nb_streams; |
|
int flush_codecs; |
|
int64_t max_analyze_duration = ic->max_analyze_duration2; |
|
int64_t max_stream_analyze_duration; |
|
int64_t probesize = ic->probesize2; |
|
|
|
if (!max_analyze_duration) |
|
max_analyze_duration = ic->max_analyze_duration; |
|
if (ic->probesize) |
|
probesize = ic->probesize; |
|
flush_codecs = probesize > 0; |
|
|
|
av_opt_set(ic, "skip_clear", "1", AV_OPT_SEARCH_CHILDREN); |
|
|
|
max_stream_analyze_duration = max_analyze_duration; |
|
if (!max_analyze_duration) { |
|
max_stream_analyze_duration = |
|
max_analyze_duration = 5*AV_TIME_BASE; |
|
if (!strcmp(ic->iformat->name, "flv")) |
|
max_stream_analyze_duration = 30*AV_TIME_BASE; |
|
} |
|
|
|
if (ic->pb) |
|
av_log(ic, AV_LOG_DEBUG, "Before avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d\n", |
|
avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count); |
|
|
|
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 = find_decoder(ic, st, st->codec->codec_id); |
|
|
|
/* Force thread count to 1 since the H.264 decoder will not extract |
|
* SPS and PPS to extradata during multi-threaded decoding. */ |
|
av_dict_set(options ? &options[i] : &thread_opt, "threads", "1", 0); |
|
|
|
if (ic->codec_whitelist) |
|
av_dict_set(options ? &options[i] : &thread_opt, "codec_whitelist", ic->codec_whitelist, 0); |
|
|
|
/* Ensure that subtitle_header is properly set. */ |
|
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE |
|
&& codec && !st->codec->codec) { |
|
if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0) |
|
av_log(ic, AV_LOG_WARNING, |
|
"Failed to open codec in av_find_stream_info\n"); |
|
} |
|
|
|
// 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) |
|
if (avcodec_open2(st->codec, codec, options ? &options[i] : &thread_opt) < 0) |
|
av_log(ic, AV_LOG_WARNING, |
|
"Failed to open codec in av_find_stream_info\n"); |
|
} |
|
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 (;;) { |
|
int analyzed_all_streams; |
|
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 (!tb_unreliable(st->codec)) |
|
fps_analyze_framecount = 0; |
|
if (ic->fps_probe_size >= 0) |
|
fps_analyze_framecount = ic->fps_probe_size; |
|
if (st->disposition & AV_DISPOSITION_ATTACHED_PIC) |
|
fps_analyze_framecount = 0; |
|
/* variable fps and no guess at the real fps */ |
|
if (!(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 && |
|
!(ic->iformat->flags & AVFMT_NOTIMESTAMPS) && |
|
st->codec_info_nb_frames < ic->max_ts_probe && |
|
(st->codec->codec_type == AVMEDIA_TYPE_VIDEO || |
|
st->codec->codec_type == AVMEDIA_TYPE_AUDIO)) |
|
break; |
|
} |
|
analyzed_all_streams = 0; |
|
if (i == ic->nb_streams) { |
|
analyzed_all_streams = 1; |
|
/* 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 >= probesize) { |
|
ret = count; |
|
av_log(ic, AV_LOG_DEBUG, |
|
"Probe buffer size limit of %"PRId64" bytes reached\n", probesize); |
|
for (i = 0; i < ic->nb_streams; i++) |
|
if (!ic->streams[i]->r_frame_rate.num && |
|
ic->streams[i]->info->duration_count <= 1 && |
|
ic->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO && |
|
strcmp(ic->iformat->name, "image2")) |
|
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) |
|
free_packet_buffer(&ic->packet_buffer, &ic->packet_buffer_end); |
|
{ |
|
pkt = add_to_pktbuf(&ic->packet_buffer, &pkt1, |
|
&ic->packet_buffer_end); |
|
if (!pkt) { |
|
ret = AVERROR(ENOMEM); |
|
goto find_stream_info_err; |
|
} |
|
if ((ret = av_dup_packet(pkt)) < 0) |
|
goto find_stream_info_err; |
|
} |
|
|
|
st = ic->streams[pkt->stream_index]; |
|
if (!(st->disposition & AV_DISPOSITION_ATTACHED_PIC)) |
|
read_size += pkt->size; |
|
|
|
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 == 0 |
|
&& st->codec_info_nb_frames>30 |
|
&& st->info->fps_first_dts != AV_NOPTS_VALUE |
|
&& st->info->fps_last_dts != AV_NOPTS_VALUE) |
|
t = FFMAX(t, av_rescale_q(st->info->fps_last_dts - st->info->fps_first_dts, st->time_base, AV_TIME_BASE_Q)); |
|
|
|
if (t >= (analyzed_all_streams ? max_analyze_duration : max_stream_analyze_duration)) { |
|
av_log(ic, AV_LOG_VERBOSE, "max_analyze_duration %"PRId64" reached at %"PRId64" microseconds\n", |
|
max_analyze_duration, |
|
t); |
|
if (ic->flags & AVFMT_FLAG_NOBUFFER) |
|
av_packet_unref(pkt); |
|
break; |
|
} |
|
if (pkt->duration) { |
|
st->info->codec_info_duration += pkt->duration; |
|
st->info->codec_info_duration_fields += st->parser && st->need_parsing && st->codec->ticks_per_frame ==2 ? st->parser->repeat_pict + 1 : 2; |
|
} |
|
} |
|
#if FF_API_R_FRAME_RATE |
|
if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) |
|
ff_rfps_add_frame(ic, st, 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) { |
|
if (ff_alloc_extradata(st->codec, i)) |
|
return AVERROR(ENOMEM); |
|
memcpy(st->codec->extradata, pkt->data, |
|
st->codec->extradata_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(ic, st, pkt, |
|
(options && i < orig_nb_streams) ? &options[i] : NULL); |
|
|
|
if (ic->flags & AVFMT_FLAG_NOBUFFER) |
|
av_packet_unref(pkt); |
|
|
|
st->codec_info_nb_frames++; |
|
count++; |
|
} |
|
|
|
if (flush_codecs) { |
|
AVPacket empty_pkt = { 0 }; |
|
int err = 0; |
|
av_init_packet(&empty_pkt); |
|
|
|
for (i = 0; i < ic->nb_streams; i++) { |
|
|
|
st = ic->streams[i]; |
|
|
|
/* flush the decoders */ |
|
if (st->info->found_decoder == 1) { |
|
do { |
|
err = try_decode_frame(ic, 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); |
|
} |
|
} |
|
} |
|
} |
|
|
|
// 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); |
|
} |
|
|
|
ff_rfps_calculate(ic); |
|
|
|
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 (avpriv_find_pix_fmt(avpriv_get_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; |
|
|
|
if (st->info->codec_info_duration >= INT64_MAX / st->time_base.num / 2|| |
|
st->info->codec_info_duration_fields >= INT64_MAX / st->time_base.den || |
|
st->info->codec_info_duration < 0) |
|
continue; |
|
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 = 0; 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); |
|
} |
|
|
|
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; |
|
} |
|
} |
|
if (st->display_aspect_ratio.num && st->display_aspect_ratio.den) { |
|
AVRational hw_ratio = { st->codec->height, st->codec->width }; |
|
st->sample_aspect_ratio = av_mul_q(st->display_aspect_ratio, |
|
hw_ratio); |
|
} |
|
} 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 (probesize) |
|
estimate_timings(ic, old_offset); |
|
|
|
av_opt_set(ic, "skip_clear", "0", AV_OPT_SEARCH_CHILDREN); |
|
|
|
if (ret >= 0 && ic->nb_streams) |
|
/* We could not have all the codec parameters before EOF. */ |
|
ret = -1; |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
const char *errmsg; |
|
st = ic->streams[i]; |
|
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; |
|
} |
|
} |
|
|
|
compute_chapters_end(ic); |
|
|
|
find_stream_info_err: |
|
for (i = 0; i < ic->nb_streams; i++) { |
|
st = ic->streams[i]; |
|
if (ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO) |
|
ic->streams[i]->codec->thread_count = 0; |
|
if (st->info) |
|
av_freep(&st->info->duration_error); |
|
av_freep(&ic->streams[i]->info); |
|
} |
|
if (ic->pb) |
|
av_log(ic, AV_LOG_DEBUG, "After avformat_find_stream_info() pos: %"PRId64" bytes read:%"PRId64" seeks:%d frames:%d\n", |
|
avio_tell(ic->pb), ic->pb->bytes_read, ic->pb->seek_count, count); |
|
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, best_bitrate = -1, best_multiframe = -1, count, bitrate, multiframe; |
|
unsigned *program = NULL; |
|
const 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 (wanted_stream_nb != real_stream_index && |
|
st->disposition & (AV_DISPOSITION_HEARING_IMPAIRED | |
|
AV_DISPOSITION_VISUAL_IMPAIRED)) |
|
continue; |
|
if (type == AVMEDIA_TYPE_AUDIO && !avctx->channels) |
|
continue; |
|
if (decoder_ret) { |
|
decoder = find_decoder(ic, st, st->codec->codec_id); |
|
if (!decoder) { |
|
if (ret < 0) |
|
ret = AVERROR_DECODER_NOT_FOUND; |
|
continue; |
|
} |
|
} |
|
count = st->codec_info_nb_frames; |
|
bitrate = avctx->bit_rate; |
|
if (!bitrate) |
|
bitrate = avctx->rc_max_rate; |
|
multiframe = FFMIN(5, count); |
|
if ((best_multiframe > multiframe) || |
|
(best_multiframe == multiframe && best_bitrate > bitrate) || |
|
(best_multiframe == multiframe && best_bitrate == bitrate && best_count >= count)) |
|
continue; |
|
best_count = count; |
|
best_bitrate = bitrate; |
|
best_multiframe = multiframe; |
|
ret = real_stream_index; |
|
best_decoder = decoder; |
|
if (program && i == nb_streams - 1 && ret < 0) { |
|
program = NULL; |
|
nb_streams = ic->nb_streams; |
|
/* no related stream found, try again with everything */ |
|
i = 0; |
|
} |
|
} |
|
if (decoder_ret) |
|
*decoder_ret = (AVCodec*)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) { |
|
int j; |
|
av_assert0(s->nb_streams>0); |
|
av_assert0(s->streams[ s->nb_streams - 1 ] == st); |
|
|
|
for (j = 0; j < st->nb_side_data; j++) |
|
av_freep(&st->side_data[j].data); |
|
av_freep(&st->side_data); |
|
st->nb_side_data = 0; |
|
|
|
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->probe_data.buf); |
|
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); |
|
if (st->info) |
|
av_freep(&st->info->duration_error); |
|
av_freep(&st->info); |
|
av_freep(&st->recommended_encoder_configuration); |
|
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); |
|
if (s->oformat && s->oformat->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_freep(&s->internal); |
|
flush_packet_queue(s); |
|
av_free(s); |
|
} |
|
|
|
void avformat_close_input(AVFormatContext **ps) |
|
{ |
|
AVFormatContext *s; |
|
AVIOContext *pb; |
|
|
|
if (!ps || !*ps) |
|
return; |
|
|
|
s = *ps; |
|
pb = s->pb; |
|
|
|
if ((s->iformat && strcmp(s->iformat->name, "image2") && 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); |
|
} |
|
|
|
AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c) |
|
{ |
|
AVStream *st; |
|
int i; |
|
AVStream **streams; |
|
|
|
if (s->nb_streams >= INT_MAX/sizeof(*streams)) |
|
return NULL; |
|
streams = av_realloc_array(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 (!st->codec) { |
|
av_free(st->info); |
|
av_free(st); |
|
return NULL; |
|
} |
|
if (s->iformat) { |
|
/* no default bitrate if decoding */ |
|
st->codec->bit_rate = 0; |
|
|
|
/* default pts setting is MPEG-like */ |
|
avpriv_set_pts_info(st, 33, 1, 90000); |
|
} |
|
|
|
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; |
|
st->pts_wrap_reference = AV_NOPTS_VALUE; |
|
st->pts_wrap_behavior = AV_PTS_WRAP_IGNORE; |
|
|
|
st->last_IP_pts = AV_NOPTS_VALUE; |
|
st->last_dts_for_order_check = AV_NOPTS_VALUE; |
|
for (i = 0; i < MAX_REORDER_DELAY + 1; i++) |
|
st->pts_buffer[i] = 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; |
|
|
|
st->inject_global_side_data = s->internal->inject_global_side_data; |
|
|
|
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->pts_wrap_reference = AV_NOPTS_VALUE; |
|
program->pts_wrap_behavior = AV_PTS_WRAP_IGNORE; |
|
|
|
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; |
|
|
|
if (end != AV_NOPTS_VALUE && start > end) { |
|
av_log(s, AV_LOG_ERROR, "Chapter end time %"PRId64" before start %"PRId64"\n", end, start); |
|
return NULL; |
|
} |
|
|
|
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 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_array(program->stream_index, program->nb_stream_indexes+1, sizeof(unsigned int)); |
|
if (!tmp) |
|
return; |
|
program->stream_index = tmp; |
|
program->stream_index[program->nb_stream_indexes++] = idx; |
|
return; |
|
} |
|
} |
|
|
|
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 (av_isdigit(*p)) |
|
nd = nd * 10 + *p++ - '0'; |
|
c = *p++; |
|
} while (av_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; |
|
} |
|
|
|
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, *at2, *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) */ |
|
at2 = p; |
|
while ((at = strchr(p, '@')) && at < ls) { |
|
av_strlcpy(authorization, at2, |
|
FFMIN(authorization_size, at + 1 - at2)); |
|
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 = av_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; |
|
} |
|
|
|
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; |
|
} |
|
|
|
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 && (av_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 && !(av_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; |
|
} |
|
|
|
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(const 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; |
|
} |
|
|
|
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; |
|
} |
|
|
|
AVRational av_guess_frame_rate(AVFormatContext *format, AVStream *st, AVFrame *frame) |
|
{ |
|
AVRational fr = st->r_frame_rate; |
|
AVRational codec_fr = st->codec->framerate; |
|
AVRational avg_fr = st->avg_frame_rate; |
|
|
|
if (avg_fr.num > 0 && avg_fr.den > 0 && fr.num > 0 && fr.den > 0 && |
|
av_q2d(avg_fr) < 70 && av_q2d(fr) > 210) { |
|
fr = avg_fr; |
|
} |
|
|
|
|
|
if (st->codec->ticks_per_frame > 1) { |
|
if ( codec_fr.num > 0 && codec_fr.den > 0 && av_q2d(codec_fr) < av_q2d(fr)*0.7 |
|
&& fabs(1.0 - av_q2d(av_div_q(avg_fr, fr))) > 0.1) |
|
fr = codec_fr; |
|
} |
|
|
|
return fr; |
|
} |
|
|
|
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 == '#' || |
|
(*spec == 'i' && *(spec + 1) == ':')) { |
|
int stream_id; |
|
char *endptr; |
|
spec += 1 + (*spec == 'i'); |
|
stream_id = strtol(spec, &endptr, 0); |
|
if (!*endptr) |
|
return stream_id == st->id; |
|
} else if (*spec == 'm' && *(spec + 1) == ':') { |
|
AVDictionaryEntry *tag; |
|
char *key, *val; |
|
int ret; |
|
|
|
spec += 2; |
|
val = strchr(spec, ':'); |
|
|
|
key = val ? av_strndup(spec, val - spec) : av_strdup(spec); |
|
if (!key) |
|
return AVERROR(ENOMEM); |
|
|
|
tag = av_dict_get(st->metadata, key, NULL, 0); |
|
if (tag) { |
|
if (!val || !strcmp(tag->value, val + 1)) |
|
ret = 1; |
|
else |
|
ret = 0; |
|
} else |
|
ret = 0; |
|
|
|
av_freep(&key); |
|
return ret; |
|
} else if (!*spec) /* empty specifier, matches everything */ |
|
return 1; |
|
|
|
av_log(s, AV_LOG_ERROR, "Invalid stream specifier: %s.\n", spec); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
int ff_generate_avci_extradata(AVStream *st) |
|
{ |
|
static const uint8_t avci100_1080p_extradata[] = { |
|
// SPS |
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, |
|
0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63, |
|
0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19, |
|
0x18, 0x21, 0x02, 0x56, 0xb9, 0x3d, 0x7d, 0x7e, |
|
0x4f, 0xe3, 0x3f, 0x11, 0xf1, 0x9e, 0x08, 0xb8, |
|
0x8c, 0x54, 0x43, 0xc0, 0x78, 0x02, 0x27, 0xe2, |
|
0x70, 0x1e, 0x30, 0x10, 0x10, 0x14, 0x00, 0x00, |
|
0x03, 0x00, 0x04, 0x00, 0x00, 0x03, 0x00, 0xca, |
|
0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
// PPS |
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48, |
|
0xd0 |
|
}; |
|
static const uint8_t avci100_1080i_extradata[] = { |
|
// SPS |
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, |
|
0xb6, 0xd4, 0x20, 0x22, 0x33, 0x19, 0xc6, 0x63, |
|
0x23, 0x21, 0x01, 0x11, 0x98, 0xce, 0x33, 0x19, |
|
0x18, 0x21, 0x03, 0x3a, 0x46, 0x65, 0x6a, 0x65, |
|
0x24, 0xad, 0xe9, 0x12, 0x32, 0x14, 0x1a, 0x26, |
|
0x34, 0xad, 0xa4, 0x41, 0x82, 0x23, 0x01, 0x50, |
|
0x2b, 0x1a, 0x24, 0x69, 0x48, 0x30, 0x40, 0x2e, |
|
0x11, 0x12, 0x08, 0xc6, 0x8c, 0x04, 0x41, 0x28, |
|
0x4c, 0x34, 0xf0, 0x1e, 0x01, 0x13, 0xf2, 0xe0, |
|
0x3c, 0x60, 0x20, 0x20, 0x28, 0x00, 0x00, 0x03, |
|
0x00, 0x08, 0x00, 0x00, 0x03, 0x01, 0x94, 0x00, |
|
// PPS |
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x33, 0x48, |
|
0xd0 |
|
}; |
|
static const uint8_t avci50_1080p_extradata[] = { |
|
// SPS |
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28, |
|
0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, |
|
0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, |
|
0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37, |
|
0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde, |
|
0x6e, 0x6c, 0xd3, 0x3c, 0x05, 0xa0, 0x22, 0x7e, |
|
0x5f, 0xfc, 0x00, 0x0c, 0x00, 0x13, 0x8c, 0x04, |
|
0x04, 0x05, 0x00, 0x00, 0x03, 0x00, 0x01, 0x00, |
|
0x00, 0x03, 0x00, 0x32, 0x84, 0x00, 0x00, 0x00, |
|
// PPS |
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, |
|
0x11 |
|
}; |
|
static const uint8_t avci50_1080i_extradata[] = { |
|
// SPS |
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x28, |
|
0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, |
|
0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, |
|
0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6e, 0x61, |
|
0x87, 0x3e, 0x73, 0x4d, 0x98, 0x0c, 0x03, 0x06, |
|
0x9c, 0x0b, 0x73, 0xe6, 0xc0, 0xb5, 0x18, 0x63, |
|
0x0d, 0x39, 0xe0, 0x5b, 0x02, 0xd4, 0xc6, 0x19, |
|
0x1a, 0x79, 0x8c, 0x32, 0x34, 0x24, 0xf0, 0x16, |
|
0x81, 0x13, 0xf7, 0xff, 0x80, 0x02, 0x00, 0x01, |
|
0xf1, 0x80, 0x80, 0x80, 0xa0, 0x00, 0x00, 0x03, |
|
0x00, 0x20, 0x00, 0x00, 0x06, 0x50, 0x80, 0x00, |
|
// PPS |
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, |
|
0x11 |
|
}; |
|
static const uint8_t avci100_720p_extradata[] = { |
|
// SPS |
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x7a, 0x10, 0x29, |
|
0xb6, 0xd4, 0x20, 0x2a, 0x33, 0x1d, 0xc7, 0x62, |
|
0xa1, 0x08, 0x40, 0x54, 0x66, 0x3b, 0x8e, 0xc5, |
|
0x42, 0x02, 0x10, 0x25, 0x64, 0x2c, 0x89, 0xe8, |
|
0x85, 0xe4, 0x21, 0x4b, 0x90, 0x83, 0x06, 0x95, |
|
0xd1, 0x06, 0x46, 0x97, 0x20, 0xc8, 0xd7, 0x43, |
|
0x08, 0x11, 0xc2, 0x1e, 0x4c, 0x91, 0x0f, 0x01, |
|
0x40, 0x16, 0xec, 0x07, 0x8c, 0x04, 0x04, 0x05, |
|
0x00, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x03, |
|
0x00, 0x64, 0x84, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
// PPS |
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xce, 0x31, 0x12, |
|
0x11 |
|
}; |
|
static const uint8_t avci50_720p_extradata[] = { |
|
// SPS |
|
0x00, 0x00, 0x00, 0x01, 0x67, 0x6e, 0x10, 0x20, |
|
0xa6, 0xd4, 0x20, 0x32, 0x33, 0x0c, 0x71, 0x18, |
|
0x88, 0x62, 0x10, 0x19, 0x19, 0x86, 0x38, 0x8c, |
|
0x44, 0x30, 0x21, 0x02, 0x56, 0x4e, 0x6f, 0x37, |
|
0xcd, 0xf9, 0xbf, 0x81, 0x6b, 0xf3, 0x7c, 0xde, |
|
0x6e, 0x6c, 0xd3, 0x3c, 0x0f, 0x01, 0x6e, 0xff, |
|
0xc0, 0x00, 0xc0, 0x01, 0x38, 0xc0, 0x40, 0x40, |
|
0x50, 0x00, 0x00, 0x03, 0x00, 0x10, 0x00, 0x00, |
|
0x06, 0x48, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, |
|
// PPS |
|
0x00, 0x00, 0x00, 0x01, 0x68, 0xee, 0x31, 0x12, |
|
0x11 |
|
}; |
|
|
|
const uint8_t *data = NULL; |
|
int size = 0; |
|
|
|
if (st->codec->width == 1920) { |
|
if (st->codec->field_order == AV_FIELD_PROGRESSIVE) { |
|
data = avci100_1080p_extradata; |
|
size = sizeof(avci100_1080p_extradata); |
|
} else { |
|
data = avci100_1080i_extradata; |
|
size = sizeof(avci100_1080i_extradata); |
|
} |
|
} else if (st->codec->width == 1440) { |
|
if (st->codec->field_order == AV_FIELD_PROGRESSIVE) { |
|
data = avci50_1080p_extradata; |
|
size = sizeof(avci50_1080p_extradata); |
|
} else { |
|
data = avci50_1080i_extradata; |
|
size = sizeof(avci50_1080i_extradata); |
|
} |
|
} else if (st->codec->width == 1280) { |
|
data = avci100_720p_extradata; |
|
size = sizeof(avci100_720p_extradata); |
|
} else if (st->codec->width == 960) { |
|
data = avci50_720p_extradata; |
|
size = sizeof(avci50_720p_extradata); |
|
} |
|
|
|
if (!size) |
|
return 0; |
|
|
|
av_freep(&st->codec->extradata); |
|
if (ff_alloc_extradata(st->codec, size)) |
|
return AVERROR(ENOMEM); |
|
memcpy(st->codec->extradata, data, size); |
|
|
|
return 0; |
|
} |
|
|
|
uint8_t *av_stream_get_side_data(AVStream *st, enum AVPacketSideDataType type, |
|
int *size) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < st->nb_side_data; i++) { |
|
if (st->side_data[i].type == type) { |
|
if (size) |
|
*size = st->side_data[i].size; |
|
return st->side_data[i].data; |
|
} |
|
} |
|
return NULL; |
|
}
|
|
|