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cogl-gst: video-sink: fix YV12/I420 support

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This fixes a mistake in commit 637728dd89d51bc28 that was meant to fix
yv12/i420 support but when the patch was updated based on review to use
COGL_PIXEL_FORMAT_A instead of COGL_PIXEL_FORMAT_G the corresponding
glsl code wasn't also updated to sample the .a component.

(cherry picked from commit a02c55105c705471866df2d306879d8616289f2a)
This commit is contained in:
Robert Bragg 2014-01-01 17:35:50 +00:00
parent 389fade01b
commit 9a879a7616
1 changed files with 3 additions and 3 deletions
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6
cogl-gst/cogl-gst-video-sink.c
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@ -718,9 +718,9 @@ cogl_gst_yv12_glsl_setup_pipeline (CoglGstVideoSink *sink,
"cogl_gst_sample_video%i (vec2 UV)\n"
"{\n"
" float y = 1.1640625 * "
"(texture2D (cogl_sampler%i, UV).g - 0.0625);\n"
" float u = texture2D (cogl_sampler%i, UV).g - 0.5;\n"
" float v = texture2D (cogl_sampler%i, UV).g - 0.5;\n"
"(texture2D (cogl_sampler%i, UV).a - 0.0625);\n"
" float u = texture2D (cogl_sampler%i, UV).a - 0.5;\n"
" float v = texture2D (cogl_sampler%i, UV).a - 0.5;\n"
" vec4 color;\n"
" color.r = y + 1.59765625 * v;\n"
" color.g = y - 0.390625 * u - 0.8125 * v;\n"