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avformat: add support to force specific AVCodecs

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previously only codec_ids could be forced, which did not allow
forcing a specific implementation like libopenjpeg vs jpeg2000.

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-09-28 17:52:45 +02:00
parent f4aec34805
commit 5082fcc0e2
4 changed files with 51 additions and 2 deletions
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4
doc/APIchanges
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@ -15,6 +15,10 @@ libavutil: 2012-10-22
API changes, most recent first:
2013-10-02 - xxxxxxx - lavf 55.19.100 - avformat.h
Add audio/video/subtitle AVCodec fields to AVFormatContext to force specific
decoders
2013-08-xx - xxxxxxx - lavfi 3.11.0 - avfilter.h
Add AVFilterGraph.execute and AVFilterGraph.opaque for custom slice threading
implementations.

30
libavformat/avformat.h
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@ -1315,9 +1315,39 @@ typedef struct AVFormatContext {
* Demuxers can use the flag to detect such changes.
*/
int io_repositioned;
/**
* Forced video codec.
* This allows forcing a specific decoder, even when there are multiple with
* the same codec_id.
* Demuxing: Set by user via av_format_set_video_codec (NO direct access).
*/
AVCodec *video_codec;
/**
* Forced audio codec.
* This allows forcing a specific decoder, even when there are multiple with
* the same codec_id.
* Demuxing: Set by user via av_format_set_audio_codec (NO direct access).
*/
AVCodec *audio_codec;
/**
* Forced subtitle codec.
* This allows forcing a specific decoder, even when there are multiple with
* the same codec_id.
* Demuxing: Set by user via av_format_set_subtitle_codec (NO direct access).
*/
AVCodec *subtitle_codec;
} AVFormatContext;
int av_format_get_probe_score(const AVFormatContext *s);
AVCodec * av_format_get_video_codec(const AVFormatContext *s);
void av_format_set_video_codec(AVFormatContext *s, AVCodec *c);
AVCodec * av_format_get_audio_codec(const AVFormatContext *s);
void av_format_set_audio_codec(AVFormatContext *s, AVCodec *c);
AVCodec * av_format_get_subtitle_codec(const AVFormatContext *s);
void av_format_set_subtitle_codec(AVFormatContext *s, AVCodec *c);
/**
* Returns the method used to set ctx->duration.

15
libavformat/utils.c
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@ -98,12 +98,27 @@ static int64_t wrap_timestamp(AVStream *st, int64_t timestamp)
}
MAKE_ACCESSORS(AVStream, stream, AVRational, r_frame_rate)
MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, video_codec)
MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, audio_codec)
MAKE_ACCESSORS(AVFormatContext, format, AVCodec *, subtitle_codec)
static 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);
}

4
libavformat/version.h
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@ -30,8 +30,8 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 55
#define LIBAVFORMAT_VERSION_MINOR 18
#define LIBAVFORMAT_VERSION_MICRO 104
#define LIBAVFORMAT_VERSION_MINOR 19
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \