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threads: default to automatic thread count detection

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This commit is contained in:
Janne Grunau 2011-12-25 11:45:05 +01:00
parent c11b92b304
commit e4e30256f8
4 changed files with 18 additions and 6 deletions
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1
Changelog
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@ -6,6 +6,7 @@ version <next>:
- Indeo 4 decoder - Indeo 4 decoder
- SMJPEG demuxer - SMJPEG demuxer
- Automatic thread count based on detection number of (available) CPU cores
version 0.8_beta1: version 0.8_beta1:

2
libavcodec/options.c
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@ -370,7 +370,7 @@ static const AVOption options[]={
{"float", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_AA_FLOAT }, INT_MIN, INT_MAX, V|D, "aa"}, {"float", NULL, 0, AV_OPT_TYPE_CONST, {.dbl = FF_AA_FLOAT }, INT_MIN, INT_MAX, V|D, "aa"},
#endif #endif
{"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E}, {"qns", "quantizer noise shaping", OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
{"threads", NULL, OFFSET(thread_count), AV_OPT_TYPE_INT, {.dbl = 1 }, 0, INT_MAX, V|E|D, "threads"}, {"threads", NULL, OFFSET(thread_count), AV_OPT_TYPE_INT, {.dbl = 0 }, 0, INT_MAX, V|E|D, "threads"},
{"auto", "detect a good number of threads", 0, AV_OPT_TYPE_CONST, {.dbl = 0 }, INT_MIN, INT_MAX, V|E|D, "threads"}, {"auto", "detect a good number of threads", 0, AV_OPT_TYPE_CONST, {.dbl = 0 }, INT_MIN, INT_MAX, V|E|D, "threads"},
{"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E}, {"me_threshold", "motion estimaton threshold", OFFSET(me_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},
{"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E}, {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), AV_OPT_TYPE_INT, {.dbl = DEFAULT }, INT_MIN, INT_MAX, V|E},

2
libavcodec/version.h
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@ -22,7 +22,7 @@
#define LIBAVCODEC_VERSION_MAJOR 53 #define LIBAVCODEC_VERSION_MAJOR 53
#define LIBAVCODEC_VERSION_MINOR 32 #define LIBAVCODEC_VERSION_MINOR 32
#define LIBAVCODEC_VERSION_MICRO 0 #define LIBAVCODEC_VERSION_MICRO 1
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \ #define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
LIBAVCODEC_VERSION_MINOR, \ LIBAVCODEC_VERSION_MINOR, \

19
libavformat/utils.c
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@ -2268,9 +2268,14 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
int i, count, ret, read_size, j; int i, count, ret, read_size, j;
AVStream *st; AVStream *st;
AVPacket pkt1, *pkt; AVPacket pkt1, *pkt;
AVDictionary *one_thread_opt = NULL;
int64_t old_offset = avio_tell(ic->pb); int64_t old_offset = avio_tell(ic->pb);
int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those int orig_nb_streams = ic->nb_streams; // new streams might appear, no options for those
/* this function doesn't flush the decoders, so force thread count
* to 1 to fix behavior when thread count > number of frames in the file */
av_dict_set(&one_thread_opt, "threads", "1", 0);
for(i=0;i<ic->nb_streams;i++) { for(i=0;i<ic->nb_streams;i++) {
AVCodec *codec; AVCodec *codec;
st = ic->streams[i]; st = ic->streams[i];
@ -2300,12 +2305,13 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
/* Ensure that subtitle_header is properly set. */ /* Ensure that subtitle_header is properly set. */
if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE if (st->codec->codec_type == AVMEDIA_TYPE_SUBTITLE
&& codec && !st->codec->codec) && codec && !st->codec->codec)
avcodec_open2(st->codec, codec, options ? &options[i] : NULL); avcodec_open2(st->codec, codec, options ? &options[i] : &one_thread_opt);
//try to just open decoders, in case this is enough to get parameters //try to just open decoders, in case this is enough to get parameters
if(!has_codec_parameters(st->codec)){ if(!has_codec_parameters(st->codec)){
if (codec && !st->codec->codec) if (codec && !st->codec->codec)
avcodec_open2(st->codec, codec, options ? &options[i] : NULL); avcodec_open2(st->codec, codec, options ? &options[i]
: &one_thread_opt);
} }
} }
@ -2444,7 +2450,8 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
least one frame of codec data, this makes sure the codec initializes 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. the channel configuration and does not only trust the values from the container.
*/ */
try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i] : NULL); try_decode_frame(st, pkt, (options && i < orig_nb_streams )? &options[i]
: &one_thread_opt);
st->codec_info_nb_frames++; st->codec_info_nb_frames++;
count++; count++;
@ -2549,8 +2556,12 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
#endif #endif
find_stream_info_err: find_stream_info_err:
for (i=0; i < ic->nb_streams; i++) for (i=0; i < ic->nb_streams; i++) {
if (ic->streams[i]->codec)
ic->streams[i]->codec->thread_count = 0;
av_freep(&ic->streams[i]->info); av_freep(&ic->streams[i]->info);
}
av_dict_free(&one_thread_opt);
return ret; return ret;
} }