mirror of https://github.com/FFmpeg/FFmpeg.git
* commit '07584eaf4a95db3f11d3bc411f9786932829e82b': mpegts: check substreams before discarding Add a smooth streaming segmenter muxer file: Add an avoption for disabling truncating existing files on open img2dec: always close AVIOContexts rtpdec_jpeg: Error out on other unsupported type values as well rtpdec_jpeg: Disallow using the reserved q values rtpdec_jpeg: Fold the default qtables case into an existing if statement rtpdec_jpeg: Store and reuse old qtables for q values 128-254 rtpdec_jpeg: Simplify the calculation of the number of qtables rtpdec_jpeg: Add more comments about the fields in the SOF0 section rtpdec_jpeg: Clarify where the subsampling magic numbers come from rtpdec_jpeg: Don't use a bitstream writer for the EOI marker rtpdec_jpeg: Don't needlessly use a bitstream writer for the header rtpdec_jpeg: Simplify writing of the jpeg header rtpdec_jpeg: Merge two if statements rtpdec_jpeg: Write the DHT section properly Conflicts: libavformat/Makefile libavformat/allformats.c libavformat/version.h Merged-by: Michael Niedermayer <michaelni@gmx.at>pull/28/head
Michael Niedermayer
13 years ago
commit
c942e8b1d7
9 changed files with 802 additions and 127 deletions
@ -0,0 +1,621 @@ |
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/*
|
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* Live smooth streaming fragmenter |
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* Copyright (c) 2012 Martin Storsjo |
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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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#include "config.h" |
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#include <float.h> |
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#if HAVE_UNISTD_H |
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#include <unistd.h> |
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#endif |
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|
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#include "avformat.h" |
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#include "internal.h" |
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#include "os_support.h" |
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#include "avc.h" |
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#include "url.h" |
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|
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#include "libavutil/opt.h" |
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#include "libavutil/avstring.h" |
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#include "libavutil/mathematics.h" |
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#include "libavutil/intreadwrite.h" |
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|
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typedef struct { |
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char file[1024]; |
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char infofile[1024]; |
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int64_t start_time, duration; |
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int n; |
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int64_t start_pos, size; |
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} Fragment; |
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|
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typedef struct { |
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AVFormatContext *ctx; |
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int ctx_inited; |
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char dirname[1024]; |
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uint8_t iobuf[32768]; |
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URLContext *out; // Current output stream where all output is written
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URLContext *out2; // Auxillary output stream where all output also is written
|
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URLContext *tail_out; // The actual main output stream, if we're currently seeked back to write elsewhere
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int64_t tail_pos, cur_pos, cur_start_pos; |
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int packets_written; |
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const char *stream_type_tag; |
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int nb_fragments, fragments_size, fragment_index; |
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Fragment **fragments; |
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const char *fourcc; |
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char *private_str; |
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int packet_size; |
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int audio_tag; |
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} OutputStream; |
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|
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typedef struct { |
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const AVClass *class; /* Class for private options. */ |
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int window_size; |
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int extra_window_size; |
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int lookahead_count; |
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int min_frag_duration; |
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int remove_at_exit; |
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OutputStream *streams; |
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int has_video, has_audio; |
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int nb_fragments; |
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} SmoothStreamingContext; |
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|
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static int ism_write(void *opaque, uint8_t *buf, int buf_size) |
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{ |
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OutputStream *os = opaque; |
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if (os->out) |
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ffurl_write(os->out, buf, buf_size); |
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if (os->out2) |
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ffurl_write(os->out2, buf, buf_size); |
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os->cur_pos += buf_size; |
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if (os->cur_pos >= os->tail_pos) |
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os->tail_pos = os->cur_pos; |
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return buf_size; |
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} |
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|
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static int64_t ism_seek(void *opaque, int64_t offset, int whence) |
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{ |
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OutputStream *os = opaque; |
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int i; |
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if (whence != SEEK_SET) |
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return AVERROR(ENOSYS); |
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if (os->tail_out) { |
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if (os->out) { |
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ffurl_close(os->out); |
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} |
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if (os->out2) { |
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ffurl_close(os->out2); |
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} |
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os->out = os->tail_out; |
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os->out2 = NULL; |
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os->tail_out = NULL; |
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} |
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if (offset >= os->cur_start_pos) { |
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ffurl_seek(os->out, offset - os->cur_start_pos, SEEK_SET); |
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os->cur_pos = offset; |
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return offset; |
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} |
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for (i = os->nb_fragments - 1; i >= 0; i--) { |
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Fragment *frag = os->fragments[i]; |
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if (offset >= frag->start_pos && offset < frag->start_pos + frag->size) { |
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int ret; |
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AVDictionary *opts = NULL; |
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os->tail_out = os->out; |
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av_dict_set(&opts, "truncate", "0", 0); |
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ret = ffurl_open(&os->out, frag->file, AVIO_FLAG_READ_WRITE, &os->ctx->interrupt_callback, &opts); |
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av_dict_free(&opts); |
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if (ret < 0) { |
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os->out = os->tail_out; |
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os->tail_out = NULL; |
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return ret; |
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} |
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av_dict_set(&opts, "truncate", "0", 0); |
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ffurl_open(&os->out2, frag->infofile, AVIO_FLAG_READ_WRITE, &os->ctx->interrupt_callback, &opts); |
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av_dict_free(&opts); |
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ffurl_seek(os->out, offset - frag->start_pos, SEEK_SET); |
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if (os->out2) |
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ffurl_seek(os->out2, offset - frag->start_pos, SEEK_SET); |
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os->cur_pos = offset; |
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return offset; |
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} |
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} |
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return AVERROR(EIO); |
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} |
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|
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static void get_private_data(OutputStream *os) |
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{ |
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AVCodecContext *codec = os->ctx->streams[0]->codec; |
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uint8_t *ptr = codec->extradata; |
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int size = codec->extradata_size; |
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int i; |
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if (codec->codec_id == AV_CODEC_ID_H264) { |
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ff_avc_write_annexb_extradata(ptr, &ptr, &size); |
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if (!ptr) |
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ptr = codec->extradata; |
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} |
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if (!ptr) |
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return; |
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os->private_str = av_mallocz(2*size + 1); |
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for (i = 0; i < size; i++) |
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snprintf(&os->private_str[2*i], 3, "%02x", ptr[i]); |
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if (ptr != codec->extradata) |
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av_free(ptr); |
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} |
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|
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static void ism_free(AVFormatContext *s) |
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{ |
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SmoothStreamingContext *c = s->priv_data; |
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int i, j; |
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if (!c->streams) |
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return; |
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for (i = 0; i < s->nb_streams; i++) { |
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OutputStream *os = &c->streams[i]; |
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ffurl_close(os->out); |
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ffurl_close(os->out2); |
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ffurl_close(os->tail_out); |
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os->out = os->out2 = os->tail_out = NULL; |
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if (os->ctx && os->ctx_inited) |
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av_write_trailer(os->ctx); |
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if (os->ctx && os->ctx->pb) |
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av_free(os->ctx->pb); |
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if (os->ctx) |
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avformat_free_context(os->ctx); |
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av_free(os->private_str); |
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for (j = 0; j < os->nb_fragments; j++) |
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av_free(os->fragments[j]); |
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av_free(os->fragments); |
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} |
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av_freep(&c->streams); |
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} |
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static int ism_write_header(AVFormatContext *s) |
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{ |
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SmoothStreamingContext *c = s->priv_data; |
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int ret = 0, i; |
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AVOutputFormat *oformat; |
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ret = mkdir(s->filename, 0777); |
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if (ret) { |
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av_log(s, AV_LOG_ERROR, "mkdir(%s): %s\n", s->filename, strerror(errno)); |
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return AVERROR(errno); |
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} |
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ret = 0; |
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|
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oformat = av_guess_format("ismv", NULL, NULL); |
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if (!oformat) { |
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ret = AVERROR_MUXER_NOT_FOUND; |
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goto fail; |
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} |
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c->streams = av_mallocz(sizeof(*c->streams) * s->nb_streams); |
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if (!c->streams) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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for (i = 0; i < s->nb_streams; i++) { |
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OutputStream *os = &c->streams[i]; |
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AVFormatContext *ctx; |
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AVStream *st; |
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AVDictionary *opts = NULL; |
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char buf[10]; |
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if (!s->streams[i]->codec->bit_rate) { |
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av_log(s, AV_LOG_ERROR, "No bit rate set for stream %d\n", i); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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snprintf(os->dirname, sizeof(os->dirname), "%s/QualityLevels(%d)", s->filename, s->streams[i]->codec->bit_rate); |
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mkdir(os->dirname, 0777); |
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ctx = avformat_alloc_context(); |
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if (!ctx) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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os->ctx = ctx; |
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ctx->oformat = oformat; |
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ctx->interrupt_callback = s->interrupt_callback; |
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if (!(st = avformat_new_stream(ctx, NULL))) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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avcodec_copy_context(st->codec, s->streams[i]->codec); |
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ctx->pb = avio_alloc_context(os->iobuf, sizeof(os->iobuf), AVIO_FLAG_WRITE, os, NULL, ism_write, ism_seek); |
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if (!ctx->pb) { |
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ret = AVERROR(ENOMEM); |
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goto fail; |
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} |
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|
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snprintf(buf, sizeof(buf), "%d", c->lookahead_count); |
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av_dict_set(&opts, "ism_lookahead", buf, 0); |
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av_dict_set(&opts, "movflags", "frag_custom", 0); |
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if ((ret = avformat_write_header(ctx, &opts)) < 0) { |
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goto fail; |
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} |
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os->ctx_inited = 1; |
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avio_flush(ctx->pb); |
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av_dict_free(&opts); |
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s->streams[i]->time_base = st->time_base; |
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if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
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c->has_video = 1; |
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os->stream_type_tag = "video"; |
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if (st->codec->codec_id == AV_CODEC_ID_H264) { |
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os->fourcc = "H264"; |
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} else if (st->codec->codec_id == AV_CODEC_ID_VC1) { |
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os->fourcc = "WVC1"; |
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} else { |
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av_log(s, AV_LOG_ERROR, "Unsupported video codec\n"); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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} else { |
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c->has_audio = 1; |
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os->stream_type_tag = "audio"; |
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if (st->codec->codec_id == AV_CODEC_ID_AAC) { |
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os->fourcc = "AACL"; |
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os->audio_tag = 0xff; |
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} else if (st->codec->codec_id == AV_CODEC_ID_WMAPRO) { |
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os->fourcc = "WMAP"; |
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os->audio_tag = 0x0162; |
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} else { |
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av_log(s, AV_LOG_ERROR, "Unsupported audio codec\n"); |
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ret = AVERROR(EINVAL); |
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goto fail; |
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} |
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os->packet_size = st->codec->block_align ? st->codec->block_align : 4; |
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} |
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get_private_data(os); |
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} |
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if (!c->has_video && c->min_frag_duration <= 0) { |
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av_log(s, AV_LOG_WARNING, "no video stream and no min frag duration set\n"); |
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ret = AVERROR(EINVAL); |
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} |
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fail: |
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if (ret) |
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ism_free(s); |
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return ret; |
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} |
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|
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static int parse_fragment(AVFormatContext *s, const char *filename, int64_t *start_ts, int64_t *duration, int64_t *moof_size, int64_t size) |
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{ |
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AVIOContext *in; |
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int ret; |
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uint32_t len; |
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if ((ret = avio_open2(&in, filename, AVIO_FLAG_READ, &s->interrupt_callback, NULL)) < 0) |
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return ret; |
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ret = AVERROR(EIO); |
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*moof_size = avio_rb32(in); |
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if (*moof_size < 8 || *moof_size > size) |
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goto fail; |
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if (avio_rl32(in) != MKTAG('m','o','o','f')) |
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goto fail; |
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len = avio_rb32(in); |
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if (len > *moof_size) |
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goto fail; |
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if (avio_rl32(in) != MKTAG('m','f','h','d')) |
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goto fail; |
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avio_seek(in, len - 8, SEEK_CUR); |
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avio_rb32(in); /* traf size */ |
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if (avio_rl32(in) != MKTAG('t','r','a','f')) |
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goto fail; |
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while (avio_tell(in) < *moof_size) { |
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uint32_t len = avio_rb32(in); |
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uint32_t tag = avio_rl32(in); |
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int64_t end = avio_tell(in) + len - 8; |
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if (len < 8 || len >= *moof_size) |
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goto fail; |
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if (tag == MKTAG('u','u','i','d')) { |
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const uint8_t tfxd[] = { |
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0x6d, 0x1d, 0x9b, 0x05, 0x42, 0xd5, 0x44, 0xe6, |
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0x80, 0xe2, 0x14, 0x1d, 0xaf, 0xf7, 0x57, 0xb2 |
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}; |
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uint8_t uuid[16]; |
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avio_read(in, uuid, 16); |
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if (!memcmp(uuid, tfxd, 16) && len >= 8 + 16 + 4 + 16) { |
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avio_seek(in, 4, SEEK_CUR); |
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*start_ts = avio_rb64(in); |
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*duration = avio_rb64(in); |
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ret = 0; |
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break; |
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} |
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} |
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avio_seek(in, end, SEEK_SET); |
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} |
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fail: |
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avio_close(in); |
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return ret; |
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} |
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|
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static int add_fragment(OutputStream *os, const char *file, const char *infofile, int64_t start_time, int64_t duration, int64_t start_pos, int64_t size) |
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{ |
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Fragment *frag; |
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if (os->nb_fragments >= os->fragments_size) { |
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os->fragments_size = (os->fragments_size + 1) * 2; |
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os->fragments = av_realloc(os->fragments, sizeof(*os->fragments)*os->fragments_size); |
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if (!os->fragments) |
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return AVERROR(ENOMEM); |
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} |
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frag = av_mallocz(sizeof(*frag)); |
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if (!frag) |
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return AVERROR(ENOMEM); |
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av_strlcpy(frag->file, file, sizeof(frag->file)); |
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av_strlcpy(frag->infofile, infofile, sizeof(frag->infofile)); |
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frag->start_time = start_time; |
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frag->duration = duration; |
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frag->start_pos = start_pos; |
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frag->size = size; |
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frag->n = os->fragment_index; |
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os->fragments[os->nb_fragments++] = frag; |
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os->fragment_index++; |
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return 0; |
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} |
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|
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static int copy_moof(AVFormatContext *s, const char* infile, const char *outfile, int64_t size) |
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{ |
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AVIOContext *in, *out; |
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int ret = 0; |
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if ((ret = avio_open2(&in, infile, AVIO_FLAG_READ, &s->interrupt_callback, NULL)) < 0) |
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return ret; |
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if ((ret = avio_open2(&out, outfile, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL)) < 0) { |
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avio_close(in); |
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return ret; |
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} |
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while (size > 0) { |
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uint8_t buf[8192]; |
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int n = FFMIN(size, sizeof(buf)); |
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n = avio_read(in, buf, n); |
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if (n <= 0) { |
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ret = AVERROR(EIO); |
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break; |
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} |
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avio_write(out, buf, n); |
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size -= n; |
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} |
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avio_flush(out); |
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avio_close(out); |
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avio_close(in); |
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return ret; |
||||
} |
||||
|
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static void output_chunk_list(OutputStream *os, AVIOContext *out, int final, int skip, int window_size) |
||||
{ |
||||
int removed = 0, i, start = 0; |
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if (os->nb_fragments <= 0) |
||||
return; |
||||
if (os->fragments[0]->n > 0) |
||||
removed = 1; |
||||
if (final) |
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skip = 0; |
||||
if (window_size) |
||||
start = FFMAX(os->nb_fragments - skip - window_size, 0); |
||||
for (i = start; i < os->nb_fragments - skip; i++) { |
||||
Fragment *frag = os->fragments[i]; |
||||
if (!final || removed) |
||||
avio_printf(out, "<c t=\"%"PRIu64"\" d=\"%"PRIu64"\" />\n", frag->start_time, frag->duration); |
||||
else |
||||
avio_printf(out, "<c n=\"%d\" d=\"%"PRIu64"\" />\n", frag->n, frag->duration); |
||||
} |
||||
} |
||||
|
||||
static int write_manifest(AVFormatContext *s, int final) |
||||
{ |
||||
SmoothStreamingContext *c = s->priv_data; |
||||
AVIOContext *out; |
||||
char filename[1024]; |
||||
int ret, i, video_chunks = 0, audio_chunks = 0, video_streams = 0, audio_streams = 0; |
||||
int64_t duration = 0; |
||||
|
||||
snprintf(filename, sizeof(filename), "%s/Manifest", s->filename); |
||||
ret = avio_open2(&out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL); |
||||
if (ret < 0) |
||||
return ret; |
||||
avio_printf(out, "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"); |
||||
for (i = 0; i < s->nb_streams; i++) { |
||||
OutputStream *os = &c->streams[i]; |
||||
if (os->nb_fragments > 0) { |
||||
Fragment *last = os->fragments[os->nb_fragments - 1]; |
||||
duration = last->start_time + last->duration; |
||||
} |
||||
if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) { |
||||
video_chunks = os->nb_fragments; |
||||
video_streams++; |
||||
} else { |
||||
audio_chunks = os->nb_fragments; |
||||
audio_streams++; |
||||
} |
||||
} |
||||
if (!final) { |
||||
duration = 0; |
||||
video_chunks = audio_chunks = 0; |
||||
} |
||||
if (c->window_size) { |
||||
video_chunks = FFMIN(video_chunks, c->window_size); |
||||
audio_chunks = FFMIN(audio_chunks, c->window_size); |
||||
} |
||||
avio_printf(out, "<SmoothStreamingMedia MajorVersion=\"2\" MinorVersion=\"0\" Duration=\"%"PRIu64"\"", duration); |
||||
if (!final) |
||||
avio_printf(out, " IsLive=\"true\" LookAheadFragmentCount=\"%d\" DVRWindowLength=\"0\"", c->lookahead_count); |
||||
avio_printf(out, ">\n"); |
||||
if (c->has_video) { |
||||
int last = -1, index = 0; |
||||
avio_printf(out, "<StreamIndex Type=\"video\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(video={start time})\">\n", video_streams, video_chunks); |
||||
for (i = 0; i < s->nb_streams; i++) { |
||||
OutputStream *os = &c->streams[i]; |
||||
if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_VIDEO) |
||||
continue; |
||||
last = i; |
||||
avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%d\" FourCC=\"%s\" MaxWidth=\"%d\" MaxHeight=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codec->bit_rate, os->fourcc, s->streams[i]->codec->width, s->streams[i]->codec->height, os->private_str); |
||||
index++; |
||||
} |
||||
output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size); |
||||
avio_printf(out, "</StreamIndex>\n"); |
||||
} |
||||
if (c->has_audio) { |
||||
int last = -1, index = 0; |
||||
avio_printf(out, "<StreamIndex Type=\"audio\" QualityLevels=\"%d\" Chunks=\"%d\" Url=\"QualityLevels({bitrate})/Fragments(audio={start time})\">\n", audio_streams, audio_chunks); |
||||
for (i = 0; i < s->nb_streams; i++) { |
||||
OutputStream *os = &c->streams[i]; |
||||
if (s->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO) |
||||
continue; |
||||
last = i; |
||||
avio_printf(out, "<QualityLevel Index=\"%d\" Bitrate=\"%d\" FourCC=\"%s\" SamplingRate=\"%d\" Channels=\"%d\" BitsPerSample=\"16\" PacketSize=\"%d\" AudioTag=\"%d\" CodecPrivateData=\"%s\" />\n", index, s->streams[i]->codec->bit_rate, os->fourcc, s->streams[i]->codec->sample_rate, s->streams[i]->codec->channels, os->packet_size, os->audio_tag, os->private_str); |
||||
index++; |
||||
} |
||||
output_chunk_list(&c->streams[last], out, final, c->lookahead_count, c->window_size); |
||||
avio_printf(out, "</StreamIndex>\n"); |
||||
} |
||||
avio_printf(out, "</SmoothStreamingMedia>\n"); |
||||
avio_flush(out); |
||||
avio_close(out); |
||||
return 0; |
||||
} |
||||
|
||||
static int ism_flush(AVFormatContext *s, int final) |
||||
{ |
||||
SmoothStreamingContext *c = s->priv_data; |
||||
int i, ret = 0; |
||||
|
||||
for (i = 0; i < s->nb_streams; i++) { |
||||
OutputStream *os = &c->streams[i]; |
||||
char filename[1024], target_filename[1024], header_filename[1024]; |
||||
int64_t start_pos = os->tail_pos, size; |
||||
int64_t start_ts, duration, moof_size; |
||||
if (!os->packets_written) |
||||
continue; |
||||
|
||||
snprintf(filename, sizeof(filename), "%s/temp", os->dirname); |
||||
ret = ffurl_open(&os->out, filename, AVIO_FLAG_WRITE, &s->interrupt_callback, NULL); |
||||
if (ret < 0) |
||||
break; |
||||
os->cur_start_pos = os->tail_pos; |
||||
av_write_frame(os->ctx, NULL); |
||||
avio_flush(os->ctx->pb); |
||||
os->packets_written = 0; |
||||
if (!os->out || os->tail_out) |
||||
return AVERROR(EIO); |
||||
|
||||
ffurl_close(os->out); |
||||
os->out = NULL; |
||||
size = os->tail_pos - start_pos; |
||||
if ((ret = parse_fragment(s, filename, &start_ts, &duration, &moof_size, size)) < 0) |
||||
break; |
||||
snprintf(header_filename, sizeof(header_filename), "%s/FragmentInfo(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts); |
||||
snprintf(target_filename, sizeof(target_filename), "%s/Fragments(%s=%"PRIu64")", os->dirname, os->stream_type_tag, start_ts); |
||||
copy_moof(s, filename, header_filename, moof_size); |
||||
rename(filename, target_filename); |
||||
add_fragment(os, target_filename, header_filename, start_ts, duration, start_pos, size); |
||||
} |
||||
|
||||
if (c->window_size || (final && c->remove_at_exit)) { |
||||
for (i = 0; i < s->nb_streams; i++) { |
||||
OutputStream *os = &c->streams[i]; |
||||
int j; |
||||
int remove = os->nb_fragments - c->window_size - c->extra_window_size - c->lookahead_count; |
||||
if (final && c->remove_at_exit) |
||||
remove = os->nb_fragments; |
||||
if (remove > 0) { |
||||
for (j = 0; j < remove; j++) { |
||||
unlink(os->fragments[j]->file); |
||||
unlink(os->fragments[j]->infofile); |
||||
av_free(os->fragments[j]); |
||||
} |
||||
os->nb_fragments -= remove; |
||||
memmove(os->fragments, os->fragments + remove, os->nb_fragments * sizeof(*os->fragments)); |
||||
} |
||||
if (final && c->remove_at_exit) |
||||
rmdir(os->dirname); |
||||
} |
||||
} |
||||
|
||||
write_manifest(s, final); |
||||
return ret; |
||||
} |
||||
|
||||
static int ism_write_packet(AVFormatContext *s, AVPacket *pkt) |
||||
{ |
||||
SmoothStreamingContext *c = s->priv_data; |
||||
AVStream *st = s->streams[pkt->stream_index]; |
||||
OutputStream *os = &c->streams[pkt->stream_index]; |
||||
int64_t end_pts = (c->nb_fragments + 1) * c->min_frag_duration; |
||||
|
||||
if ((!c->has_video || st->codec->codec_type == AVMEDIA_TYPE_VIDEO) && |
||||
av_compare_ts(pkt->pts, st->time_base, |
||||
end_pts, AV_TIME_BASE_Q) >= 0 && |
||||
pkt->flags & AV_PKT_FLAG_KEY && os->packets_written) { |
||||
|
||||
ism_flush(s, 0); |
||||
c->nb_fragments++; |
||||
} |
||||
|
||||
os->packets_written++; |
||||
return ff_write_chained(os->ctx, 0, pkt, s); |
||||
} |
||||
|
||||
static int ism_write_trailer(AVFormatContext *s) |
||||
{ |
||||
SmoothStreamingContext *c = s->priv_data; |
||||
ism_flush(s, 1); |
||||
|
||||
if (c->remove_at_exit) { |
||||
char filename[1024]; |
||||
snprintf(filename, sizeof(filename), "%s/Manifest", s->filename); |
||||
unlink(filename); |
||||
rmdir(s->filename); |
||||
} |
||||
|
||||
ism_free(s); |
||||
return 0; |
||||
} |
||||
|
||||
#define OFFSET(x) offsetof(SmoothStreamingContext, x) |
||||
#define E AV_OPT_FLAG_ENCODING_PARAM |
||||
static const AVOption options[] = { |
||||
{ "window_size", "number of fragments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E }, |
||||
{ "extra_window_size", "number of fragments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E }, |
||||
{ "lookahead_count", "number of lookahead fragments", OFFSET(lookahead_count), AV_OPT_TYPE_INT, { .i64 = 2 }, 0, INT_MAX, E }, |
||||
{ "min_frag_duration", "minimum fragment duration (in microseconds)", OFFSET(min_frag_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E }, |
||||
{ "remove_at_exit", "remove all fragments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E }, |
||||
{ NULL }, |
||||
}; |
||||
|
||||
static const AVClass ism_class = { |
||||
.class_name = "smooth streaming muxer", |
||||
.item_name = av_default_item_name, |
||||
.option = options, |
||||
.version = LIBAVUTIL_VERSION_INT, |
||||
}; |
||||
|
||||
|
||||
AVOutputFormat ff_smoothstreaming_muxer = { |
||||
.name = "smoothstreaming", |
||||
.long_name = NULL_IF_CONFIG_SMALL("Smooth Streaming Muxer"), |
||||
.priv_data_size = sizeof(SmoothStreamingContext), |
||||
.audio_codec = AV_CODEC_ID_AAC, |
||||
.video_codec = AV_CODEC_ID_H264, |
||||
.flags = AVFMT_GLOBALHEADER | AVFMT_NOFILE, |
||||
.write_header = ism_write_header, |
||||
.write_packet = ism_write_packet, |
||||
.write_trailer = ism_write_trailer, |
||||
.priv_class = &ism_class, |
||||
}; |
||||
Loading…
Reference in new issue