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video: add video blend helper functions to docs

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I don't think those were ever meant to be made public,
but they are, so we might as well document them.
This commit is contained in:
Tim-Philipp Müller 2014-11-01 14:28:55 +00:00
parent ceee8d5d40
commit f04a9589d4
2 changed files with 23 additions and 1 deletions
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5
docs/libs/gst-plugins-base-libs-sections.txt
View file

@ -2408,6 +2408,11 @@ GST_VIDEO_TILE_MAKE_STRIDE
GST_VIDEO_TILE_X_TILES
GST_VIDEO_TILE_Y_TILES
#video-blend.h
<SUBSECTION>
gst_video_blend
gst_video_blend_scale_linear_RGBA
#video-converter.h
<SUBSECTION>
gst_video_converter_new

19
gst-libs/gst/video/video-blend.c
View file

@ -146,6 +146,22 @@ G_STMT_START { \
ret = v0 + (v1 * (255 - alpha)) / 255; \
} G_STMT_END
/**
* gst_video_blend_scale_linear_RGBA:
* @src: the #GstVideoInfo describing the video data in @src_buffer
* @src_buffer: the source buffer containing video pixels to scale
* @dest_height: the height in pixels to scale the video data in @src_buffer to
* @dest_width: the width in pixels to scale the video data in @src_buffer to
* @dest: (out): pointer to a #GstVideoInfo structure that will be filled in
* with the details for @dest_buffer
* @dest_buffer: (out): a pointer to a #GstBuffer variable, which will be
* set to a newly-allocated buffer containing the scaled pixels.
*
* Scales a buffer containing RGBA (or AYUV) video. This is an internal
* helper function which is used to scale subtitle overlays, and may be
* deprecated in the near future. Use #GstVideoScaler to scale video buffers
* instead.
*/
/* returns newly-allocated buffer, which caller must unref */
void
gst_video_blend_scale_linear_RGBA (GstVideoInfo * src, GstBuffer * src_buffer,
@ -232,7 +248,8 @@ gst_video_blend_scale_linear_RGBA (GstVideoInfo * src, GstBuffer * src_buffer,
g_free (tmpbuf);
}
/* video_blend:
/**
* gst_video_blend:
* @dest: The #GstVideoFrame where to blend @src in
* @src: the #GstVideoFrame that we want to blend into
* @x: The x offset in pixel where the @src image should be blended