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gl/colorconvert: fix YUY2/UYVY download for RG/LA textures

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Matthew Waters 2014-05-29 16:07:40 +10:00 committed by Tim-Philipp Müller
parent 8ac92cd90d
commit 4fe67d48be
1 changed files with 24 additions and 5 deletions
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29
gst-libs/gst/gl/gstglcolorconvert.c
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@ -325,11 +325,13 @@ static const gchar frag_RGB_to_YUY2_UYVY[] =
RGB_TO_YUV_COEFFICIENTS
"void main(void) {\n"
" vec4 texel1, texel2;\n"
" vec2 texel3;\n"
" float fx, fy, y1, y2, u, v;\n"
" fx = v_texcoord.x;\n"
" fy = v_texcoord.y;\n"
" texel1 = texture2D(tex, vec2(fx*2.0, fy)).%c%c%c%c;\n"
" texel2 = texture2D(tex, vec2(fx*2.0+1.0 / width, fy)).%c%c%c%c;\n"
" float inorder = mod (v_texcoord.x * width, 2.0);\n"
" texel1 = texture2D(tex, vec2(fx, fy)).%c%c%c%c;\n"
" texel2 = texture2D(tex, vec2(fx+1.0 / width, fy)).%c%c%c%c;\n"
" y1 = dot(texel1.rgb, coeff1);\n"
" y2 = dot(texel2.rgb, coeff1);\n"
" u = dot(texel1.rgb, coeff2);\n"
@ -338,7 +340,14 @@ static const gchar frag_RGB_to_YUY2_UYVY[] =
" y2 += offset.x;\n"
" u += offset.y;\n"
" v += offset.z;\n"
" gl_FragColor = vec4(%s);\n"
" if (inorder < 1.0) {\n"
" texel3.r = %s;\n"
" texel3.g = %s;\n"
" } else {\n"
" texel3.r = %s;\n"
" texel3.g = %s;\n"
" }\n"
" gl_FragColor = vec4(texel3.r, texel3.g, 0.0, 0.0);\n"
"}\n";
static const gchar text_vertex_shader[] =
@ -815,14 +824,14 @@ _RGB_to_YUV (GstGLColorConvert * convert)
info->frag_prog = g_strdup_printf (frag_RGB_to_YUY2_UYVY,
pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3],
pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3],
"y1,u,y2,v");
"y1", "u", "y2", "v");
info->out_n_textures = 1;
break;
case GST_VIDEO_FORMAT_UYVY:
info->frag_prog = g_strdup_printf (frag_RGB_to_YUY2_UYVY,
pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3],
pixel_order[0], pixel_order[1], pixel_order[2], pixel_order[3],
"u,y1,v,y2");
"u", "y1", "v", "y2");
info->out_n_textures = 1;
break;
default:
@ -978,6 +987,16 @@ _init_convert (GstGLColorConvert * convert)
goto incompatible_api;
}
/* Requires reading from a RG/LA framebuffer... */
if (USING_GLES2 (convert->context) &&
(GST_VIDEO_INFO_FORMAT (&convert->out_info) == GST_VIDEO_FORMAT_YUY2 ||
GST_VIDEO_INFO_FORMAT (&convert->out_info) ==
GST_VIDEO_FORMAT_UYVY)) {
g_free (info->frag_prog);
GST_ERROR ("Conversion requires reading with an unsupported format");
goto incompatible_api;
}
res =
gst_gl_context_gen_shader (convert->context, text_vertex_shader,
info->frag_prog, &convert->shader);