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v4l2codecs: h264: Enable 1 frame delay on non-live

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When doing non-live decoding, enable 1 frame of delay. This will ensure
that we queue the next decoding job before we actually wait for the previous
to complete. This improves throughput notably on RK3399.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1881>
This commit is contained in:
Nicolas Dufresne 2021-01-29 09:43:07 -05:00 committed by GStreamer Merge Bot
parent 241a490084
commit 99ebbf72ef
2 changed files with 27 additions and 4 deletions
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27
sys/v4l2codecs/gstv4l2codech264dec.c
View file

@ -323,7 +323,7 @@ gst_v4l2_codec_h264_dec_decide_allocation (GstVideoDecoder * decoder,
GstQuery * query)
{
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
guint min = 0;
guint min = 0, num_bitstream;
self->has_videometa = gst_query_find_allocation_meta (query,
GST_VIDEO_META_API_TYPE, NULL);
@ -336,8 +336,11 @@ gst_v4l2_codec_h264_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, self->min_pool_size + min + 4);
self->src_pool = gst_v4l2_codec_pool_new (self->src_allocator, &self->vinfo);
@ -1066,6 +1069,24 @@ gst_v4l2_codec_h264_dec_end_picture (GstH264Decoder * decoder,
return gst_v4l2_codec_h264_dec_submit_bitstream (self, picture, 0);
}
static guint
gst_v4l2_codec_h264_dec_get_preferred_output_delay (GstH264Decoder * decoder,
gboolean live)
{
GstV4l2CodecH264Dec *self = GST_V4L2_CODEC_H264_DEC (decoder);
guint delay;
if (live)
delay = 0;
else
/* Just one for now, perhaps we can make this configurable in the future. */
delay = 1;
gst_v4l2_decoder_set_render_delay (self->decoder, delay);
return delay;
}
static void
gst_v4l2_codec_h264_dec_set_flushing (GstV4l2CodecH264Dec * self,
gboolean flushing)
@ -1222,6 +1243,8 @@ gst_v4l2_codec_h264_dec_subclass_init (GstV4l2CodecH264DecClass * klass,
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_decode_slice);
h264decoder_class->end_picture =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_end_picture);
h264decoder_class->get_preferred_output_delay =
GST_DEBUG_FUNCPTR (gst_v4l2_codec_h264_dec_get_preferred_output_delay);
klass->device = device;
gst_v4l2_decoder_install_properties (gobject_class, PROP_LAST, device);

4
sys/v4l2codecs/gstv4l2decoder.c
View file

@ -915,7 +915,7 @@ gst_v4l2_decoder_alloc_sub_request (GstV4l2Decoder * self,
return request;
}
/**
/*
* gst_v4l2_decoder_set_render_delay:
* @self a #GstV4l2Decoder pointer
* @delay The expected render delay
@ -933,7 +933,7 @@ gst_v4l2_decoder_set_render_delay (GstV4l2Decoder * self, guint delay)
self->render_delay = delay;
}
/**
/*
* gst_v4l2_decoder_get_render_delay:
* @self a #GstV4l2Decoder pointer
*