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video: Add gst_video_format_get_component_depth()

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This commit is contained in:
David Schleef 2011-02-18 16:26:59 -08:00
parent 82199c5815
commit 7a24e3ea4e
2 changed files with 68 additions and 0 deletions
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67
gst-libs/gst/video/video.c
View file

@ -1163,6 +1163,73 @@ gst_video_format_has_alpha (GstVideoFormat format)
}
}
/**
* gst_video_format_get_component_depth:
* @format: a #GstVideoFormat
*
* Returns the number of bits used to encode an individual pixel of
* a given component. Typically this is 8, although higher and lower
* values are possible for some formats.
*
* Since: 0.10.33
*
* Returns: depth of component
*/
int
gst_video_format_get_component_depth (GstVideoFormat format, int component)
{
if (component == 3 && !gst_video_format_has_alpha (format))
return 0;
switch (format) {
case GST_VIDEO_FORMAT_RGB16:
case GST_VIDEO_FORMAT_BGR16:
if (component == 1)
return 6;
return 5;
case GST_VIDEO_FORMAT_RGB15:
case GST_VIDEO_FORMAT_BGR15:
return 5;
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_YVYU:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_Y41B:
case GST_VIDEO_FORMAT_Y42B:
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
case GST_VIDEO_FORMAT_v308:
case GST_VIDEO_FORMAT_Y800:
case GST_VIDEO_FORMAT_YUV9:
case GST_VIDEO_FORMAT_YVU9:
case GST_VIDEO_FORMAT_IYU1:
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_A420:
case GST_VIDEO_FORMAT_RGB8_PALETTED:
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
default:
return 8;
case GST_VIDEO_FORMAT_v210:
case GST_VIDEO_FORMAT_UYVP:
return 10;
case GST_VIDEO_FORMAT_Y16:
case GST_VIDEO_FORMAT_v216:
return 16;
}
}
/**
* gst_video_format_get_row_stride:
* @format: a #GstVideoFormat

1
gst-libs/gst/video/video.h
View file

@ -421,6 +421,7 @@ gboolean gst_video_format_is_rgb (GstVideoFormat format);
gboolean gst_video_format_is_yuv (GstVideoFormat format);
gboolean gst_video_format_is_gray (GstVideoFormat format);
gboolean gst_video_format_has_alpha (GstVideoFormat format);
int gst_video_format_get_component_depth (GstVideoFormat format, int component);
int gst_video_format_get_row_stride (GstVideoFormat format, int component,
int width);
int gst_video_format_get_pixel_stride (GstVideoFormat format, int component);