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video: Add support for 8-bit and 16-bit grayscale formats

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This commit is contained in:
Sebastian Dröge 2010-04-07 17:06:36 +02:00
parent 318fbf3310
commit 1e3a66f539
2 changed files with 121 additions and 1 deletions
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113
gst-libs/gst/video/video.c
View file

@ -404,6 +404,24 @@ gst_video_format_parse_caps (GstCaps * caps, GstVideoFormat * format,
} else {
ok = FALSE;
}
} else if (gst_structure_has_name (structure, "video/x-raw-gray")) {
int depth;
int bpp;
int endianness;
ok &= gst_structure_get_int (structure, "depth", &depth);
ok &= gst_structure_get_int (structure, "bpp", &bpp);
ok &= gst_structure_get_int (structure, "endianness", &endianness);
if (depth == 8 && bpp == 8) {
*format = GST_VIDEO_FORMAT_GRAY8;
} else if (depth == 16 && bpp == 16 && endianness == G_BIG_ENDIAN) {
*format = GST_VIDEO_FORMAT_GRAY16_BE;
} else if (depth == 16 && bpp == 16 && endianness == G_LITTLE_ENDIAN) {
*format = GST_VIDEO_FORMAT_GRAY16_LE;
} else {
ok = FALSE;
}
} else {
ok = FALSE;
}
@ -621,6 +639,53 @@ gst_video_format_new_caps (GstVideoFormat format, int width, int height,
}
return caps;
}
if (gst_video_format_is_gray (format)) {
GstCaps *caps;
int bpp;
int depth;
int endianness;
switch (format) {
case GST_VIDEO_FORMAT_GRAY8:
bpp = depth = 8;
endianness = G_BIG_ENDIAN;
break;
case GST_VIDEO_FORMAT_GRAY16_BE:
bpp = depth = 16;
endianness = G_BIG_ENDIAN;
break;
case GST_VIDEO_FORMAT_GRAY16_LE:
bpp = depth = 16;
endianness = G_LITTLE_ENDIAN;
break;
default:
return NULL;
break;
}
if (bpp > 8) {
caps = gst_caps_new_simple ("video/x-raw-gray",
"bpp", G_TYPE_INT, bpp,
"depth", G_TYPE_INT, depth,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
} else {
caps = gst_caps_new_simple ("video/x-raw-gray",
"bpp", G_TYPE_INT, bpp,
"depth", G_TYPE_INT, depth,
"endianness", G_TYPE_INT, G_BIG_ENDIAN,
"width", G_TYPE_INT, width,
"height", G_TYPE_INT, height,
"framerate", GST_TYPE_FRACTION, framerate_n, framerate_d,
"pixel-aspect-ratio", GST_TYPE_FRACTION, par_n, par_d, NULL);
}
return caps;
}
return NULL;
}
@ -881,6 +946,29 @@ gst_video_format_is_yuv (GstVideoFormat format)
}
}
/**
* gst_video_format_is_gray:
* @format: a #GstVideoFormat
*
* Determine whether the video format is a grayscale format.
*
* Since: 0.10.29
*
* Returns: TRUE if @format represents grayscale video
*/
gboolean
gst_video_format_is_gray (GstVideoFormat format)
{
switch (format) {
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return TRUE;
default:
return FALSE;
}
}
/**
* gst_video_format_has_alpha:
* @format: a #GstVideoFormat
@ -999,6 +1087,11 @@ gst_video_format_get_row_stride (GstVideoFormat format, int component,
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
return GST_ROUND_UP_4 (width);
case GST_VIDEO_FORMAT_GRAY8:
return GST_ROUND_UP_4 (width);
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return GST_ROUND_UP_4 (width * 2);
default:
return 0;
}
@ -1068,6 +1161,11 @@ gst_video_format_get_pixel_stride (GstVideoFormat format, int component)
} else {
return 2;
}
case GST_VIDEO_FORMAT_GRAY8:
return 1;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return 2;
default:
return 0;
}
@ -1129,6 +1227,9 @@ gst_video_format_get_component_width (GstVideoFormat format, int component,
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return width;
default:
return 0;
@ -1186,6 +1287,9 @@ gst_video_format_get_component_height (GstVideoFormat format, int component,
case GST_VIDEO_FORMAT_Y444:
case GST_VIDEO_FORMAT_v210:
case GST_VIDEO_FORMAT_v216:
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return height;
default:
return 0;
@ -1379,6 +1483,10 @@ gst_video_format_get_component_offset (GstVideoFormat format, int component,
return GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height) + 1;
if (component == 2)
return GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height);
case GST_VIDEO_FORMAT_GRAY8:
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return 0;
default:
return 0;
}
@ -1444,6 +1552,11 @@ gst_video_format_get_size (GstVideoFormat format, int width, int height)
case GST_VIDEO_FORMAT_NV12:
case GST_VIDEO_FORMAT_NV21:
return GST_ROUND_UP_4 (width) * GST_ROUND_UP_2 (height) * 3 / 2;
case GST_VIDEO_FORMAT_GRAY8:
return GST_ROUND_UP_4 (width) * height;
case GST_VIDEO_FORMAT_GRAY16_BE:
case GST_VIDEO_FORMAT_GRAY16_LE:
return GST_ROUND_UP_4 (width * 2) * height;
default:
return 0;
}

9
gst-libs/gst/video/video.h
View file

@ -53,6 +53,9 @@ G_BEGIN_DECLS
* @GST_VIDEO_FORMAT_v216: packed 4:2:2 16-bit YUV, Y0-U0-Y1-V1 order (Since: 0.10.24)
* @GST_VIDEO_FORMAT_NV12: planar 4:2:0 YUV with interleaved UV plane (Since: 0.10.26)
* @GST_VIDEO_FORMAT_NV21: planar 4:2:0 YUV with interleaved VU plane (Since: 0.10.26)
* @GST_VIDEO_FORMAT_GRAY8: 8-bit grayscale (Since: 0.10.29)
* @GST_VIDEO_FORMAT_GRAY16_BE: 16-bit grayscale, most significant byte first (Since: 0.10.29)
* @GST_VIDEO_FORMAT_GRAY16_LE: 16-bit grayscale, least significant byte first (Since: 0.10.29)
*
* Enum value describing the most common video formats.
*/
@ -80,7 +83,10 @@ typedef enum {
GST_VIDEO_FORMAT_v210,
GST_VIDEO_FORMAT_v216,
GST_VIDEO_FORMAT_NV12,
GST_VIDEO_FORMAT_NV21
GST_VIDEO_FORMAT_NV21,
GST_VIDEO_FORMAT_GRAY8,
GST_VIDEO_FORMAT_GRAY16_BE,
GST_VIDEO_FORMAT_GRAY16_LE
} GstVideoFormat;
#define GST_VIDEO_BYTE1_MASK_32 "0xFF000000"
@ -303,6 +309,7 @@ GstVideoFormat gst_video_format_from_fourcc (guint32 fourcc);
guint32 gst_video_format_to_fourcc (GstVideoFormat format);
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_row_stride (GstVideoFormat format, int component,
int width);