static av_cold int ff_libde265dec_ctx_init(AVCodecContext *avctx)
{
DE265Context *ctx = (DE265Context *) avctx->priv_data;
ctx->decoder = de265_new_decoder();
// XXX: always decode multiple threads for now
if (1 || avctx->active_thread_type & FF_THREAD_SLICE) {
int threads = avctx->thread_count;
if (threads <= 0) {
threads = av_cpu_count();
}
if (threads > 0) {
// XXX: We start more threads than cores for now, as some threads
// might get blocked while waiting for dependent data. Having more
// threads increases decoding speed by about 10%
threads *= 2;
if (threads > 32) {
// TODO: this limit should come from the libde265 headers
threads = 32;
}
de265_start_worker_threads(ctx->decoder, threads);
}
}
#if LIBDE265_NUMERIC_VERSION < 0x00050000
ctx->pts_queue_len = 0;
ctx->pts_min_queue_len = 0;
#endif
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
return 0;
}
static gboolean
gst_libde265_dec_start (VIDEO_DECODER_BASE * parse)
{
GstLibde265Dec *dec = GST_LIBDE265_DEC (parse);
_gst_libde265_dec_free_decoder(dec);
dec->ctx = de265_new_decoder();
if (dec->ctx == NULL) {
return FALSE;
}
int threads;
#if defined(_SC_NPROC_ONLN)
threads = sysconf(_SC_NPROC_ONLN);
#elif defined(_SC_NPROCESSORS_ONLN)
threads = sysconf(_SC_NPROCESSORS_ONLN);
#else
#warning "Don't know how to get number of CPU cores, will use the default thread count"
threads = DEFAULT_THREAD_COUNT;
#endif
if (threads <= 0) {
threads = DEFAULT_THREAD_COUNT;
}
// XXX: We start more threads than cores for now, as some threads
// might get blocked while waiting for dependent data. Having more
// threads increases decoding speed by about 10%
threads *= 2;
if (threads > 32) {
// TODO: this limit should come from the libde265 headers
threads = 32;
}
de265_start_worker_threads(dec->ctx, threads);
GST_INFO ("Starting %d worker threads\n", threads);
// NOTE: we explicitly disable hash checks for now
de265_set_parameter_bool(dec->ctx, DE265_DECODER_PARAM_BOOL_SEI_CHECK_HASH, 0);
return TRUE;
}
static gboolean
gst_libde265_dec_start (GstVideoDecoder * decoder)
{
GstLibde265Dec *dec = GST_LIBDE265_DEC (decoder);
int threads = dec->max_threads;
struct de265_image_allocation allocation;
_gst_libde265_dec_free_decoder (dec);
dec->ctx = de265_new_decoder ();
if (dec->ctx == NULL) {
return FALSE;
}
if (threads == 0) {
threads = g_get_num_processors ();
/* NOTE: We start more threads than cores for now, as some threads
* might get blocked while waiting for dependent data. Having more
* threads increases decoding speed by about 10% */
threads *= 2;
}
if (threads > 1) {
if (threads > 32) {
/* TODO: this limit should come from the libde265 headers */
threads = 32;
}
de265_start_worker_threads (dec->ctx, threads);
}
GST_INFO_OBJECT (dec, "Using libde265 %s with %d worker threads",
de265_get_version (), threads);
allocation.get_buffer = gst_libde265_dec_get_buffer;
allocation.release_buffer = gst_libde265_dec_release_buffer;
de265_set_image_allocation_functions (dec->ctx, &allocation, decoder);
/* NOTE: we explicitly disable hash checks for now */
de265_set_parameter_bool (dec->ctx, DE265_DECODER_PARAM_BOOL_SEI_CHECK_HASH,
0);
return TRUE;
}