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videoconvert: fix 0_255 handling

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We also need to apply an offset to the Cb and Cr samples in the 0-255 case.
This commit is contained in:
Wim Taymans 2012-06-04 16:13:48 +02:00
parent 8f88f015f0
commit 93c3a74755
1 changed files with 56 additions and 7 deletions
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63
gst/videoconvert/videoconvert.c
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@ -221,18 +221,38 @@ videoconvert_convert_compute_matrix (VideoConvert * convert)
else
use_16 = FALSE;
color_matrix_set_identity (&dst);
/* 1, bring color components to [0..1.0] range */
switch (in_info->colorimetry.range) {
case GST_VIDEO_COLOR_RANGE_0_255:
if (use_16)
color_matrix_scale_components (&dst, (1 / 65535.0), (1 / 65535.0),
(1 / 65535.0));
else
color_matrix_scale_components (&dst, (1 / 255.0), (1 / 255.0),
(1 / 255.0));
switch (in_info->finfo->unpack_format) {
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_AYUV64:
GST_DEBUG ("using 0-255 input range YUV");
if (use_16) {
color_matrix_offset_components (&dst, 0, -32768, -32768);
color_matrix_scale_components (&dst, (1 / 65535.0), (1 / 65535.0),
(1 / 65535.0));
} else {
color_matrix_offset_components (&dst, 0, -128, -128);
color_matrix_scale_components (&dst, (1 / 255.0), (1 / 255.0),
(1 / 255.0));
}
break;
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ARGB64:
GST_DEBUG ("using 0-255 input range RGB");
if (use_16)
color_matrix_scale_components (&dst, (1 / 65535.0), (1 / 65535.0),
(1 / 65535.0));
else
color_matrix_scale_components (&dst, (1 / 255.0), (1 / 255.0),
(1 / 255.0));
break;
default:
break;
}
break;
default:
case GST_VIDEO_COLOR_RANGE_16_235:
@ -240,6 +260,7 @@ videoconvert_convert_compute_matrix (VideoConvert * convert)
switch (in_info->finfo->unpack_format) {
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_AYUV64:
GST_DEBUG ("using 16-235 input range YUV");
if (use_16) {
color_matrix_offset_components (&dst, -4096, -32768, -32768);
color_matrix_scale_components (&dst, (1 / 56064.0), (1 / 57344.0),
@ -252,6 +273,7 @@ videoconvert_convert_compute_matrix (VideoConvert * convert)
break;
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ARGB64:
GST_DEBUG ("using 16-235 input range RGB");
if (use_16) {
color_matrix_offset_components (&dst, -4096, -4096, -4096);
color_matrix_scale_components (&dst, (1 / 56064.0), (1 / 56064.0),
@ -316,6 +338,31 @@ videoconvert_convert_compute_matrix (VideoConvert * convert)
/* 8, bring color components to nominal range */
switch (out_info->colorimetry.range) {
case GST_VIDEO_COLOR_RANGE_0_255:
switch (out_info->finfo->unpack_format) {
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_AYUV64:
GST_DEBUG ("using 0-255 output range YUV");
if (use_16) {
color_matrix_scale_components (&dst, 65535.0, 65535.0, 65535.0);
color_matrix_offset_components (&dst, 0, 32768, 32768);
} else {
color_matrix_scale_components (&dst, 255.0, 255.0, 255.0);
color_matrix_offset_components (&dst, 0, 128, 128);
}
break;
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ARGB64:
GST_DEBUG ("using 0-255 output range RGB");
if (use_16)
color_matrix_scale_components (&dst, 65535.0, 65535.0, 65535.0);
else
color_matrix_scale_components (&dst, 255.0, 255.0, 255.0);
break;
default:
break;
}
break;
GST_DEBUG ("using 0-255 output range");
if (use_16)
color_matrix_scale_components (&dst, 65535.0, 65535.0, 65535.0);
else
@ -326,6 +373,7 @@ videoconvert_convert_compute_matrix (VideoConvert * convert)
switch (out_info->finfo->unpack_format) {
case GST_VIDEO_FORMAT_AYUV:
case GST_VIDEO_FORMAT_AYUV64:
GST_DEBUG ("using 16-235 output range YUV");
if (use_16) {
color_matrix_scale_components (&dst, 56064.0, 57344.0, 57344.0);
color_matrix_offset_components (&dst, 4096, 32768, 32768);
@ -336,6 +384,7 @@ videoconvert_convert_compute_matrix (VideoConvert * convert)
break;
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ARGB64:
GST_DEBUG ("using 16-235 output range RGB");
if (use_16) {
color_matrix_scale_components (&dst, 56064.0, 56064.0, 56064.0);
color_matrix_offset_components (&dst, 4096, 4096, 4096);