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v4l2codecs: gstv4l2codecsvp9dec: implement a render delay

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The v4l2 backend support delayed output for performance reasons.
It is then possible to use render delays to queue multiple requests
simultaneously, thus increasing performance.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1012>
This commit is contained in:
Daniel Almeida 2021-04-07 16:15:32 -03:00 committed by GStreamer Marge Bot
parent ccab90773f
commit 120b96a974
1 changed files with 24 additions and 1 deletions
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25
subprojects/gst-plugins-bad/sys/v4l2codecs/gstv4l2codecvp9dec.c
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@ -137,6 +137,23 @@ gst_v4l2_codec_vp9_dec_picture_data_get (GstVp9Picture * picture)
return gst_v4l2_codec_vp9_dec_picture_data_ref (data);
}
static guint
gst_v4l2_codec_vp9_dec_get_preferred_output_delay (GstVp9Decoder * decoder,
gboolean is_live)
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
guint delay;
if (is_live)
delay = 0;
else
delay = 1;
gst_v4l2_decoder_set_render_delay (self->decoder, delay);
return delay;
}
static void
gst_v4l2_codec_vp9_dec_fill_lf_params (GstV4l2CodecVp9Dec * self,
const GstVp9LoopFilterParams * lf)
@ -538,6 +555,7 @@ gst_v4l2_codec_vp9_dec_decide_allocation (GstVideoDecoder * decoder,
{
GstV4l2CodecVp9Dec *self = GST_V4L2_CODEC_VP9_DEC (decoder);
guint min = 0;
guint num_bitstream;
self->has_videometa = gst_query_find_allocation_meta (query,
GST_VIDEO_META_API_TYPE, NULL);
@ -550,8 +568,11 @@ gst_v4l2_codec_vp9_dec_decide_allocation (GstVideoDecoder * decoder,
min = MAX (2, min);
num_bitstream = 1 +
MAX (1, gst_v4l2_decoder_get_render_delay (self->decoder));
self->sink_allocator = gst_v4l2_codec_allocator_new (self->decoder,
GST_PAD_SINK, 2);
GST_PAD_SINK, num_bitstream);
self->src_allocator = gst_v4l2_codec_allocator_new (self->decoder,
GST_PAD_SRC, GST_VP9_REF_FRAMES + min + 4);
self->src_pool = gst_v4l2_codec_pool_new (self->src_allocator, &self->vinfo);
@ -1090,6 +1111,8 @@ gst_v4l2_codec_vp9_dec_subclass_init (GstV4l2CodecVp9DecClass * klass,
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_output_picture);
vp9decoder_class->duplicate_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_duplicate_picture);
vp9decoder_class->get_preferred_output_delay =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_vp9_dec_get_preferred_output_delay);
klass->device = device;
gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);