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vaapiupload: use implicit color conversion to NV12.

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Always perform conversion of sources buffers to NV12 since this is
the way we tested for this capability in ensure_allowed_caps(). This
also saves memory bandwidth for further rendering. However, this may
not preserve quality since the YUV buffers are down-sampled to 4:2:0.
This commit is contained in:
Gwenole Beauchesne 2013-07-12 15:15:07 +02:00
parent ac75755105
commit d79d561819
1 changed files with 15 additions and 0 deletions
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15
gst/vaapi/gstvaapiuploader.c
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@ -219,6 +219,21 @@ ensure_surface_pool(GstVaapiUploader *uploader, GstCaps *caps,
if (!*caps_changed_ptr) if (!*caps_changed_ptr)
return TRUE; return TRUE;
/* Always try to downsample source buffers to YUV 4:2:0 format as
this saves memory bandwidth for further rendering */
/* XXX: this also means that visual quality is not preserved */
if (format != GST_VIDEO_FORMAT_ENCODED) {
const GstVaapiChromaType chroma_type =
gst_video_format_get_chroma_type(format);
if (chroma_type != GST_VAAPI_CHROMA_TYPE_YUV420) {
const GstVideoFormat image_format =
GST_VIDEO_INFO_FORMAT(&priv->image_info);
GST_INFO("use implicit conversion of %s buffers to NV12 surfaces",
gst_video_format_to_string(image_format));
gst_video_info_set_format(&vi, GST_VIDEO_FORMAT_NV12, width, height);
}
}
pool = gst_vaapi_surface_pool_new(priv->display, &vi); pool = gst_vaapi_surface_pool_new(priv->display, &vi);
if (!pool) if (!pool)
return FALSE; return FALSE;