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threads: introduce CODEC_CAP_AUTO_THREADS and add it to libx264

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Some external codecs have their own code to determine the best number
of threads. This number is not necessary the number of cpu cores.
Thread_count will be only 0 if the codec has CODEC_CAP_AUTO_THREADS.
This commit is contained in:
Janne Grunau 2012-01-01 14:21:50 +01:00
parent febd022228
commit b4d44a45f9
4 changed files with 9 additions and 2 deletions
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4
libavcodec/avcodec.h
View File

@ -777,6 +777,10 @@ typedef struct RcOverride{
* Codec supports changed parameters at any point.
*/
#define CODEC_CAP_PARAM_CHANGE 0x4000
/**
* Codec supports avctx->thread_count == 0 (auto).
*/
#define CODEC_CAP_AUTO_THREADS 0x8000
//The following defines may change, don't expect compatibility if you use them.
#define MB_TYPE_INTRA4x4 0x0001

2
libavcodec/libx264.c
View File

@ -592,7 +592,7 @@ AVCodec ff_libx264_encoder = {
.init = X264_init,
.encode = X264_frame,
.close = X264_close,
.capabilities = CODEC_CAP_DELAY,
.capabilities = CODEC_CAP_DELAY | CODEC_CAP_AUTO_THREADS,
.long_name = NULL_IF_CONFIG_SMALL("libx264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10"),
.priv_class = &class,
.defaults = x264_defaults,

3
libavcodec/pthread.c
View File

@ -982,6 +982,9 @@ static void validate_thread_parameters(AVCodecContext *avctx)
} else if (avctx->codec->capabilities & CODEC_CAP_SLICE_THREADS &&
avctx->thread_type & FF_THREAD_SLICE) {
avctx->active_thread_type = FF_THREAD_SLICE;
} else if (!(avctx->codec->capabilities & CODEC_CAP_AUTO_THREADS)) {
avctx->thread_count = 1;
avctx->active_thread_type = 0;
}
}

2
libavcodec/version.h
View File

@ -22,7 +22,7 @@
#define LIBAVCODEC_VERSION_MAJOR 53
#define LIBAVCODEC_VERSION_MINOR 32
#define LIBAVCODEC_VERSION_MICRO 1
#define LIBAVCODEC_VERSION_MICRO 2
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \