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omxvideoenc: pass padding requirements to ALLOCATION query

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By passing the expected video buffer layout, the upstream producer
may be able to produce buffers fitting those requierements allowing
gst-omx to use dynamic buffer mode rather than having to copy each input
buffer.

This is particularly useful with v4l2src as it can request the capture
driver to produce buffers with the required paddings.
This commit is contained in:
Guillaume Desmottes 2019-05-15 14:04:47 +02:00
parent 800cc4bd67
commit 2939a46dd2
1 changed files with 25 additions and 1 deletions
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26
omx/gstomxvideoenc.c
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@ -3157,6 +3157,27 @@ create_input_pool (GstOMXVideoEnc * self, GstCaps * caps, guint num_buffers)
}
#endif
static GstStructure *
get_allocation_video_meta (GstOMXVideoEnc * self, GstVideoInfo * info)
{
GstStructure *result;
GstVideoAlignment align;
gst_omx_video_get_port_padding (self->enc_in_port, info, &align);
result = gst_structure_new_empty ("video-meta");
gst_structure_set (result, "padding-top", G_TYPE_UINT, align.padding_top,
"padding-bottom", G_TYPE_UINT, align.padding_bottom,
"padding-left", G_TYPE_UINT, align.padding_left,
"padding-right", G_TYPE_UINT, align.padding_right, NULL);
GST_LOG_OBJECT (self, "Request buffer layout to producer: %" GST_PTR_FORMAT,
result);
return result;
}
static gboolean
gst_omx_video_enc_propose_allocation (GstVideoEncoder * encoder,
GstQuery * query)
@ -3166,6 +3187,7 @@ gst_omx_video_enc_propose_allocation (GstVideoEncoder * encoder,
GstCaps *caps;
GstVideoInfo info;
GstBufferPool *pool = NULL;
GstStructure *params;
gst_query_parse_allocation (query, &caps, NULL);
@ -3179,7 +3201,9 @@ gst_omx_video_enc_propose_allocation (GstVideoEncoder * encoder,
return FALSE;
}
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL);
params = get_allocation_video_meta (self, &info);
gst_query_add_allocation_meta (query, GST_VIDEO_META_API_TYPE, params);
gst_structure_free (params);
num_buffers = self->enc_in_port->port_def.nBufferCountMin + 1;