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author | Reynaldo H. Verdejo Pinochet <reynaldo@collabora.com> | 2012-10-10 02:04:18 -0300 |
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committer | Sebastian Dröge <sebastian.droege@collabora.co.uk> | 2012-10-18 14:35:18 +0200 |
commit | a95834a4911c3507b864c0478771d2d7106c7031 (patch) | |
tree | 21d468536e2528ed9ae09ec3d764e885533bc631 /ext | |
parent | a7a2dcc433aa11f2a7101c82f4f2bf01d0b9c7df (diff) | |
download | gstreamer-plugins-bad-a95834a4911c3507b864c0478771d2d7106c7031.tar.gz |
eglglessink: GLSL: Optimize frag_AYUV_prog
- Avoid repeatedly performing the texture lookup
- Use consts for the transform's offset and cofficients values
- Use the dot product instead of the explicit mult and add
Diffstat (limited to 'ext')
-rw-r--r-- | ext/eglgles/gsteglglessink.c | 23 |
1 files changed, 12 insertions, 11 deletions
diff --git a/ext/eglgles/gsteglglessink.c b/ext/eglgles/gsteglglessink.c index b03de8226..b70e92772 100644 --- a/ext/eglgles/gsteglglessink.c +++ b/ext/eglgles/gsteglglessink.c @@ -213,23 +213,24 @@ static const char *frag_REORDER_prog = { /* Packed YUV converters */ -/** From gst-plugins-gl: AYUV to RGB conversion */ +/** AYUV to RGB conversion */ static const char *frag_AYUV_prog = { "precision mediump float;" "varying vec2 opos;" "uniform sampler2D tex;" + "const vec3 offset = vec3(-0.0625, -0.5, -0.5);" + "const vec3 rcoeff = vec3(1.164, 0.000, 1.596);" + "const vec3 gcoeff = vec3(1.164,-0.391,-0.813);" + "const vec3 bcoeff = vec3(1.164, 2.018, 0.000);" "void main(void) {" - " float r,g,b,y,u,v;" + " float r,g,b;" + " vec3 yuv; " vec2 nxy = opos.xy;" - " y=texture2D(tex,nxy).g;" - " u=texture2D(tex,nxy).b;" - " v=texture2D(tex,nxy).a;" - " y=1.1643*(y-0.0625);" - " u=u-0.5;" - " v=v-0.5;" - " r=y+1.5958*v;" - " g=y-0.39173*u-0.81290*v;" - " b=y+2.017*u;" + " yuv = texture2D(tex,nxy).gba;" + " yuv += offset;" + " r = dot(yuv, rcoeff);" + " g = dot(yuv, gcoeff);" + " b = dot(yuv, bcoeff);" " gl_FragColor=vec4(r,g,b,1.0);" "}" }; |