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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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3
libavcodec/pthread.c
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@ -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;
}
}