audio frame multi-threaded decoding

Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavcodec/options_table.h

@@ -227,7 +227,7 @@ static const AVOption options[]={
 {"vis_qp", "visualize quantization parameter (QP), lower QP are tinted greener", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_VIS_QP }, INT_MIN, INT_MAX, V|D, "debug"},
 {"vis_mb_type", "visualize block types", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_VIS_MB_TYPE }, INT_MIN, INT_MAX, V|D, "debug"},
 {"buffers", "picture buffer allocations", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_BUFFERS }, INT_MIN, INT_MAX, V|D, "debug"},
-{"thread_ops", "threading operations", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_THREADS }, INT_MIN, INT_MAX, V|D, "debug"},
+{"thread_ops", "threading operations", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_THREADS }, INT_MIN, INT_MAX, V|A|D, "debug"},
 {"vismv", "visualize motion vectors (MVs)", OFFSET(debug_mv), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, 0, INT_MAX, V|D, "debug_mv"},
 {"pf", "forward predicted MVs of P-frames", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_VIS_MV_P_FOR }, INT_MIN, INT_MAX, V|D, "debug_mv"},
 {"bf", "forward predicted MVs of B-frames", 0, AV_OPT_TYPE_CONST, {.i64 = FF_DEBUG_VIS_MV_B_FOR }, INT_MIN, INT_MAX, V|D, "debug_mv"},
@@ -285,7 +285,7 @@ static const AVOption options[]={
 {"rc_init_occupancy", "number of bits which should be loaded into the rc buffer before decoding starts", OFFSET(rc_initial_buffer_occupancy), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
 {"flags2", NULL, OFFSET(flags2), AV_OPT_TYPE_FLAGS, {.i64 = DEFAULT}, 0, UINT_MAX, V|A|E|D, "flags2"},
 {"error", NULL, OFFSET(error_rate), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
-{"threads", NULL, OFFSET(thread_count), AV_OPT_TYPE_INT, {.i64 = 1 }, 0, INT_MAX, V|E|D, "threads"},
+{"threads", NULL, OFFSET(thread_count), AV_OPT_TYPE_INT, {.i64 = 1 }, 0, INT_MAX, V|A|E|D, "threads"},
 {"auto", "autodetect a suitable number of threads to use", 0, AV_OPT_TYPE_CONST, {.i64 = 0 }, INT_MIN, INT_MAX, V|E|D, "threads"},
 {"me_threshold", "motion estimation threshold", OFFSET(me_threshold), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
 {"mb_threshold", "macroblock threshold", OFFSET(mb_threshold), AV_OPT_TYPE_INT, {.i64 = DEFAULT }, INT_MIN, INT_MAX, V|E},
@@ -357,7 +357,7 @@ static const AVOption options[]={
 {"chroma_sample_location", NULL, OFFSET(chroma_sample_location), AV_OPT_TYPE_INT, {.i64 = AVCHROMA_LOC_UNSPECIFIED }, 0, AVCHROMA_LOC_NB-1, V|E|D},
 {"log_level_offset", "set the log level offset", OFFSET(log_level_offset), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX },
 {"slices", "number of slices, used in parallelized encoding", OFFSET(slices), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, V|E},
-{"thread_type", "select multithreading type", OFFSET(thread_type), AV_OPT_TYPE_FLAGS, {.i64 = FF_THREAD_SLICE|FF_THREAD_FRAME }, 0, INT_MAX, V|E|D, "thread_type"},
+{"thread_type", "select multithreading type", OFFSET(thread_type), AV_OPT_TYPE_FLAGS, {.i64 = FF_THREAD_SLICE|FF_THREAD_FRAME }, 0, INT_MAX, V|A|E|D, "thread_type"},
 {"slice", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_THREAD_SLICE }, INT_MIN, INT_MAX, V|E|D, "thread_type"},
 {"frame", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_THREAD_FRAME }, INT_MIN, INT_MAX, V|E|D, "thread_type"},
 {"audio_service_type", "audio service type", OFFSET(audio_service_type), AV_OPT_TYPE_INT, {.i64 = AV_AUDIO_SERVICE_TYPE_MAIN }, 0, AV_AUDIO_SERVICE_TYPE_NB-1, A|E, "audio_service_type"},

libavcodec/pthread.c

@@ -403,6 +403,11 @@ static int update_context_from_thread(AVCodecContext *dst, AVCodecContext *src,
 
         dst->hwaccel = src->hwaccel;
         dst->hwaccel_context = src->hwaccel_context;
+
+        dst->channels       = src->channels;
+        dst->sample_rate    = src->sample_rate;
+        dst->sample_fmt     = src->sample_fmt;
+        dst->channel_layout = src->channel_layout;
     }
 
     if (for_user) {
@@ -477,7 +482,8 @@ static void release_delayed_buffers(PerThreadContext *p)
         pthread_mutex_lock(&fctx->buffer_mutex);
 
         // fix extended data in case the caller screwed it up
-        av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO);
+        av_assert0(p->avctx->codec_type == AVMEDIA_TYPE_VIDEO ||
+                   p->avctx->codec_type == AVMEDIA_TYPE_AUDIO);
         f = &p->released_buffers[--p->num_released_buffers];
         f->extended_data = f->data;
         av_frame_unref(f);

libavcodec/utils.c

@@ -2075,7 +2075,7 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
     if (!avctx->refcounted_frames)
         av_frame_unref(&avci->to_free);
 
-    if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size) {
+    if ((avctx->codec->capabilities & CODEC_CAP_DELAY) || avpkt->size || (avctx->active_thread_type & FF_THREAD_FRAME)) {
         uint8_t *side;
         int side_size;
         // copy to ensure we do not change avpkt
@@ -2084,11 +2084,15 @@ int attribute_align_arg avcodec_decode_audio4(AVCodecContext *avctx,
         apply_param_change(avctx, &tmp);
 
         avctx->pkt = &tmp;
+        if (HAVE_THREADS && avctx->active_thread_type & FF_THREAD_FRAME)
+            ret = ff_thread_decode_frame(avctx, frame, got_frame_ptr, &tmp);
+        else {
             ret = avctx->codec->decode(avctx, frame, got_frame_ptr, &tmp);
+            frame->pkt_dts = avpkt->dts;
+        }
         if (ret >= 0 && *got_frame_ptr) {
             add_metadata_from_side_data(avctx, frame);
             avctx->frame_number++;
-            frame->pkt_dts = avpkt->dts;
             av_frame_set_best_effort_timestamp(frame,
                                                guess_correct_pts(avctx,
                                                                  frame->pkt_pts,

libavformat/utils.c

@@ -3179,7 +3179,7 @@ int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)
  find_stream_info_err:
     for (i=0; i < ic->nb_streams; i++) {
         st = ic->streams[i];
-        if (ic->streams[i]->codec)
+        if (ic->streams[i]->codec && ic->streams[i]->codec->codec_type != AVMEDIA_TYPE_AUDIO)
             ic->streams[i]->codec->thread_count = 0;
         if (st->info)
             av_freep(&st->info->duration_error);