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libs: add gst_vaapi_video_format_from_va_fourcc() helper.

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Add gst_vaapi_video_format_from_va_fourcc() helper that converts from a
VA fourcc value to a suitable GstVideoFormat.
This commit is contained in:
Gwenole Beauchesne 2013-07-24 11:37:23 +02:00
parent 53fc8bb4c7
commit 8ffe11a9df
2 changed files with 27 additions and 0 deletions
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24
gst-libs/gst/vaapi/video-format.c
View file

@ -286,6 +286,30 @@ gst_vaapi_video_format_to_caps(GstVideoFormat format)
return m ? gst_caps_from_string(m->caps_str) : NULL;
}
/**
* gst_vaapi_video_format_from_va_fourcc:
* @fourcc: a FOURCC value
*
* Converts a VA fourcc into the corresponding #GstVideoFormat. If no
* matching fourcc was found, then zero is returned.
*
* Return value: the #GstVideoFormat corresponding to the VA @fourcc
*/
GstVideoFormat
gst_vaapi_video_format_from_va_fourcc(guint32 fourcc)
{
const GstVideoFormatMap *m;
/* Note: VA fourcc values are now standardized and shall represent
a unique format. The associated VAImageFormat is just a hint to
determine RGBA component ordering */
for (m = gst_vaapi_video_formats; m->format; m++) {
if (m->va_format.fourcc == fourcc)
return m->format;
}
return GST_VIDEO_FORMAT_UNKNOWN;
}
/**
* gst_vaapi_video_format_from_va_format:
* @va_format: a #VAImageFormat

3
gst-libs/gst/vaapi/video-format.h
View file

@ -46,6 +46,9 @@ gst_vaapi_video_format_from_caps(GstCaps *caps);
GstCaps *
gst_vaapi_video_format_to_caps(GstVideoFormat format);
GstVideoFormat
gst_vaapi_video_format_from_va_fourcc(guint32 fourcc);
GstVideoFormat
gst_vaapi_video_format_from_va_format(const VAImageFormat *va_format);