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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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glcolorconvert: use color matrices
Allows programatically supporting whatever new formats are added to libgstvideo. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/6596>
This commit is contained in:
Matthew Waters
GStreamer Marge Bot
parent
9480197377
commit
674e643428
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@ -48,6 +48,9 @@
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* #GstGLColorConvert to convert between video formats and color spaces.
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*/
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/* TODO: by default videoconvert does not convert primaries, but this may
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* be an option in the future */
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#define USING_OPENGL(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL, 1, 0))
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#define USING_OPENGL3(context) (gst_gl_context_check_gl_version (context, GST_GL_API_OPENGL3, 3, 1))
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#define USING_OPENGL30(context) \
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@ -74,55 +77,10 @@ typedef struct
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} CopyMetaData;
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#define YUV_TO_RGB_COEFFICIENTS \
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"uniform vec3 offset;\n" \
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"uniform vec3 coeff1;\n" \
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"uniform vec3 coeff2;\n" \
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"uniform vec3 coeff3;\n"
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/* FIXME: use the colormatrix support from videoconvert */
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/* BT. 601 standard with the following ranges:
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* Y = [16..235] (of 255)
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* Cb/Cr = [16..240] (of 255)
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*/
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static const gfloat from_yuv_bt601_offset[] = {-0.0625f, -0.5f, -0.5f};
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static const gfloat from_yuv_bt601_rcoeff[] = {1.164f, 0.000f, 1.596f};
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static const gfloat from_yuv_bt601_gcoeff[] = {1.164f,-0.391f,-0.813f};
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static const gfloat from_yuv_bt601_bcoeff[] = {1.164f, 2.018f, 0.000f};
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/* BT. 709 standard with the following ranges:
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* Y = [16..235] (of 255)
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* Cb/Cr = [16..240] (of 255)
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*/
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static const gfloat from_yuv_bt709_offset[] = {-0.0625f, -0.5f, -0.5f};
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static const gfloat from_yuv_bt709_rcoeff[] = {1.164f, 0.000f, 1.787f};
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static const gfloat from_yuv_bt709_gcoeff[] = {1.164f,-0.213f,-0.531f};
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static const gfloat from_yuv_bt709_bcoeff[] = {1.164f,2.112f, 0.000f};
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"uniform mat4 to_RGB_matrix;\n" \
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#define RGB_TO_YUV_COEFFICIENTS \
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"uniform vec3 offset;\n" \
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"uniform vec3 coeff1;\n" \
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"uniform vec3 coeff2;\n" \
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"uniform vec3 coeff3;\n"
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/* Matrix inverses of the color matrices found above */
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/* BT. 601 standard with the following ranges:
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* Y = [16..235] (of 255)
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* Cb/Cr = [16..240] (of 255)
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*/
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static const gfloat from_rgb_bt601_offset[] = {0.0625f, 0.5f, 0.5f};
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static const gfloat from_rgb_bt601_ycoeff[] = {0.256816f, 0.504154f, 0.0979137f};
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static const gfloat from_rgb_bt601_ucoeff[] = {-0.148246f, -0.29102f, 0.439266f};
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static const gfloat from_rgb_bt601_vcoeff[] = {0.439271f, -0.367833f, -0.071438f};
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/* BT. 709 standard with the following ranges:
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* Y = [16..235] (of 255)
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* Cb/Cr = [16..240] (of 255)
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*/
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static const gfloat from_rgb_bt709_offset[] = {0.0625f, 0.5f, 0.5f};
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static const gfloat from_rgb_bt709_ycoeff[] = {0.182604f, 0.614526f, 0.061976f};
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static const gfloat from_rgb_bt709_ucoeff[] = {-0.100640f, -0.338688f, 0.439327f};
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static const gfloat from_rgb_bt709_vcoeff[] = {0.440654f, -0.400285f, -0.040370f};
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"uniform mat4 to_YUV_matrix;\n" \
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/* GRAY16 to RGB conversion
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* data transferred as GL_LUMINANCE_ALPHA then convert back to GRAY16
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@ -158,24 +116,9 @@ struct shader_templ
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GstGLTextureTarget target;
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};
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static const char glsl_func_yuv_to_rgb[] = \
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"vec3 yuv_to_rgb (vec3 yuv, vec3 offset, vec3 ycoeff, vec3 ucoeff, vec3 vcoeff) {\n" \
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" vec3 rgb;\n" \
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" yuv += offset;\n" \
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" rgb.r = dot(yuv, ycoeff);\n" \
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" rgb.g = dot(yuv, ucoeff);\n" \
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" rgb.b = dot(yuv, vcoeff);\n" \
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" return rgb;\n" \
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"}\n";
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static const char glsl_func_rgb_to_yuv[] = \
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"vec3 rgb_to_yuv (vec3 rgb, vec3 offset, vec3 rcoeff, vec3 gcoeff, vec3 bcoeff) {\n" \
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" vec3 yuv;\n" \
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" yuv.r = dot(rgb.rgb, rcoeff);\n" \
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" yuv.g = dot(rgb.rgb, gcoeff);\n" \
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" yuv.b = dot(rgb.rgb, bcoeff);\n" \
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" yuv += offset;\n" \
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" return yuv;\n" \
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static const char glsl_func_color_matrix[] = \
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"vec4 color_matrix_apply (vec4 texel, mat4 colormatrix) {\n" \
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" return colormatrix * texel;\n" \
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"}\n";
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static const char glsl_func_swizzle[] = "vec4 swizzle(vec4 texel, int components[4]) {\n" \
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@ -244,51 +187,43 @@ static const struct shader_templ templ_COMPOSE =
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/* Shaders for AYUV and varieties */
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static const gchar templ_AYUV_to_RGB_BODY[] =
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"vec4 texel, rgba;\n"
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"texel = swizzle(texture2D(tex, texcoord * tex_scale0), input_swizzle);\n"
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"rgba.rgb = yuv_to_rgb (texel.rgb, offset, coeff1, coeff2, coeff3);\n"
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"rgba.a = texel.a;\n"
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"vec4 texel = swizzle(texture2D(tex, texcoord * tex_scale0), input_swizzle);\n"
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"vec4 rgba = color_matrix_apply(texel, to_RGB_matrix);\n"
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"gl_FragColor = swizzle(rgba, output_swizzle);\n";
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static const struct shader_templ templ_AYUV_to_RGB =
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{ NULL,
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D tex;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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static const gchar templ_RGB_to_AYUV_BODY[] =
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"vec4 texel, yuva;\n"
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"texel = swizzle(texture2D(tex, texcoord), input_swizzle);\n"
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"yuva.xyz = rgb_to_yuv (texel.rgb, offset, coeff1, coeff2, coeff3);\n"
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"vec4 texel = swizzle(texture2D(tex, texcoord), input_swizzle);\n"
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"vec4 yuva = color_matrix_apply(texel, to_YUV_matrix);\n"
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"yuva.a = %s;\n"
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"gl_FragColor = swizzle(yuva, output_swizzle);\n";
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static const struct shader_templ templ_RGB_to_AYUV =
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{ NULL,
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DEFAULT_UNIFORMS RGB_TO_YUV_COEFFICIENTS "uniform sampler2D tex;\n",
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{ glsl_func_swizzle, glsl_func_rgb_to_yuv, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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/* YUV to RGB conversion */
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static const gchar templ_PLANAR_YUV_to_RGB_BODY[] =
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"vec4 yuva, rgba;\n"
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/* FIXME: should get the sampling right... */
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"yuva.x = texture2D(Ytex, texcoord * tex_scale0).r;\n"
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"yuva.y = texture2D(Utex, texcoord * tex_scale1).r;\n"
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"yuva.z = texture2D(Vtex, texcoord * tex_scale2).r;\n"
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"%s"
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"yuva = yuva * in_bitdepth_factor;\n"
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"vec4 yuva = fetch_planar_yuv(Ytex, Utex, Vtex, texcoord);\n"
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"yuva = swizzle(yuva, input_swizzle);\n"
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"rgba.rgb = yuv_to_rgb (yuva.xyz, offset, coeff1, coeff2, coeff3);\n"
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"rgba.a = yuva.a;\n"
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"vec4 rgba = color_matrix_apply(yuva, to_RGB_matrix);\n"
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"%s"
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"gl_FragColor = swizzle(rgba, output_swizzle);\n";
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static const struct shader_templ templ_PLANAR_YUV_to_RGB =
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{ NULL,
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D Ytex, Utex, Vtex;\n" "uniform float in_bitdepth_factor;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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@ -297,7 +232,7 @@ static const struct shader_templ templ_A420_to_RGB =
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{ NULL,
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/* 4th uniform is the alpha buffer */
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D Ytex, Utex, Vtex, Atex;\n" "uniform float in_bitdepth_factor;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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@ -332,8 +267,8 @@ static const gchar templ_RGB_to_PLANAR_YUV_BODY[] =
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" }\n"
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" }\n"
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"}\n"
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"yuva.x = rgb_to_yuv (texel.rgb, offset, coeff1, coeff2, coeff3).x;\n"
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"yuva.yz = rgb_to_yuv (uv_texel.rgb, offset, coeff1, coeff2, coeff3).yz;\n"
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"yuva.x = color_matrix_apply(texel, to_YUV_matrix).x;\n"
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"yuva.yz = color_matrix_apply(uv_texel, to_YUV_matrix).yz;\n"
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"yuva.a = texel.a;\n"
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"yuva = swizzle(yuva, output_swizzle);\n"
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"yuva = yuva * out_bitdepth_factor;\n"
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@ -346,34 +281,32 @@ static const struct shader_templ templ_RGB_to_PLANAR_YUV =
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{ NULL,
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DEFAULT_UNIFORMS RGB_TO_YUV_COEFFICIENTS "uniform sampler2D tex;\n"
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"uniform vec2 chroma_sampling;\n" "uniform float out_bitdepth_factor;\n",
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{ glsl_func_swizzle, glsl_func_rgb_to_yuv, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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/* semi-planar to RGB conversion */
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static const gchar templ_SEMI_PLANAR_to_RGB_BODY[] =
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"vec4 rgba;\n"
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"vec4 yuva;\n"
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/* FIXME: should get the sampling right... */
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"yuva.x=texture2D(Ytex, texcoord * tex_scale0).r;\n"
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"yuva.yz=texture2D(UVtex, texcoord * tex_scale1).r%c;\n"
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"%s"
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"yuva = swizzle(yuva, input_swizzle);\n"
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"rgba.rgb = yuv_to_rgb (yuva.xyz, offset, coeff1, coeff2, coeff3);\n"
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"rgba.a = yuva.a;\n"
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"vec4 rgba = color_matrix_apply (yuva, to_RGB_matrix);\n"
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"gl_FragColor = swizzle(rgba, output_swizzle);\n";
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static const struct shader_templ templ_SEMI_PLANAR_to_RGB =
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{ NULL,
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D Ytex, UVtex;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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static const struct shader_templ templ_AV12_to_RGB =
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{ NULL,
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D Ytex, UVtex, Atex;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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@ -389,7 +322,7 @@ static const struct shader_templ templ_AV12_to_RGB =
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/* TILED semi-planar to RGB conversion */
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static const gchar templ_TILED_SEMI_PLANAR_to_RGB_BODY[] =
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" vec4 rgba;\n"
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" vec3 yuv;\n"
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" vec4 yuva;\n"
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" ivec2 texel;\n"
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"\n"
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" const ivec2 luma_dim = ivec2(%i, %i);\n"
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@ -403,20 +336,20 @@ static const gchar templ_TILED_SEMI_PLANAR_to_RGB_BODY[] =
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" ivec2 tile_coord = coord / luma_dim;\n"
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" ivec2 delta_coord = coord %% luma_dim;\n" \
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" texel = frag_to_tile(tile_coord, delta_coord, luma_dim, iwidth, tiles_per_row, 0);\n"
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" yuv.x = texelFetch(Ytex, texel, 0).r;\n"
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" yuva.x = texelFetch(Ytex, texel, 0).r;\n"
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"\n"
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" ivec2 chroma_tcoord = ivec2(tile_coord.x, tile_coord.y / fy);\n"
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" texel = frag_to_tile(chroma_tcoord, delta_coord / 2, chroma_dim, iwidth / 2, tiles_per_row, tile_coord.y %% fy);\n"
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" yuv.yz = texelFetch(UVtex, texel, 0).%c%c;\n"
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" yuva.yz = texelFetch(UVtex, texel, 0).%c%c;\n"
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" yuva.a = 1.0;\n"
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"\n"
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" rgba.rgb = yuv_to_rgb (yuv, offset, coeff1, coeff2, coeff3);\n"
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" rgba.a = 1.0;\n"
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" vec4 rgba = color_matrix_apply(yuva, to_RGB_matrix);\n"
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" gl_FragColor = swizzle(rgba, output_swizzle);\n";
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static const struct shader_templ templ_TILED_SEMI_PLANAR_to_RGB =
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{ NULL,
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D Ytex, UVtex;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, glsl_func_frag_to_tile, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, glsl_func_frag_to_tile, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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@ -428,8 +361,8 @@ static const gchar templ_RGB_to_SEMI_PLANAR_YUV_BODY[] =
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"vec4 yuva;\n"
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"texel = swizzle(texture2D(tex, texcoord), input_swizzle);\n"
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"uv_texel = swizzle(texture2D(tex, texcoord * tex_scale0 * chroma_sampling), input_swizzle);\n"
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"yuva.x = rgb_to_yuv (texel.rgb, offset, coeff1, coeff2, coeff3).x;\n"
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"yuva.yz = rgb_to_yuv (uv_texel.rgb, offset, coeff1, coeff2, coeff3).yz;\n"
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"yuva.x = color_matrix_apply(texel, to_YUV_matrix).x;\n"
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"yuva.yz = color_matrix_apply(uv_texel, to_YUV_matrix).yz;\n"
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"yuva.a = 1.0;\n"
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"yuva = swizzle(yuva, output_swizzle);\n"
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"gl_FragData[0] = vec4(yuva.x, 0.0, 0.0, 1.0);\n"
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@ -440,19 +373,19 @@ static const struct shader_templ templ_RGB_to_SEMI_PLANAR_YUV =
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{ NULL,
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DEFAULT_UNIFORMS RGB_TO_YUV_COEFFICIENTS "uniform sampler2D tex;\n"
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"uniform vec2 chroma_sampling;\n",
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{glsl_func_swizzle, glsl_func_rgb_to_yuv, NULL, },
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{glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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/* YUY2:r,g,a
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UYVY:a,b,r */
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static const gchar templ_YUY2_UYVY_to_RGB_BODY[] =
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"vec4 rgba, uv_texel;\n"
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"vec3 yuv;\n"
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"vec4 uv_texel;\n"
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"vec4 yuva;\n"
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/* FIXME: should get the sampling right... */
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"float dx1 = -poffset_x;\n"
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"float dx2 = 0.0;\n"
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"yuv.x = texture2D(Ytex, texcoord * tex_scale0).%c;\n"
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"yuva.x = texture2D(Ytex, texcoord * tex_scale0).%c;\n"
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/* v_texcoord are normalized, texcoord may not be e.g. rectangle textures */
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"float inorder = mod (v_texcoord.x * width, 2.0);\n"
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"if (inorder < 1.0) {\n"
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@ -461,21 +394,21 @@ static const gchar templ_YUY2_UYVY_to_RGB_BODY[] =
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"}\n"
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"uv_texel.rg = texture2D(Ytex, texcoord * tex_scale0 + vec2(dx1, 0.0)).r%c;\n"
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"uv_texel.ba = texture2D(Ytex, texcoord * tex_scale0 + vec2(dx2, 0.0)).r%c;\n"
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"yuv.yz = uv_texel.%c%c;\n"
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"rgba.rgb = yuv_to_rgb (yuv, offset, coeff1, coeff2, coeff3);\n"
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"rgba.a = 1.0;\n"
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"yuva.yz = uv_texel.%c%c;\n"
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"yuva.a = 1.0;\n"
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"vec4 rgba = color_matrix_apply(yuva, to_RGB_matrix);\n"
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"gl_FragColor = swizzle(rgba, output_swizzle);\n";
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static const struct shader_templ templ_YUY2_UYVY_to_RGB =
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{ NULL,
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DEFAULT_UNIFORMS YUV_TO_RGB_COEFFICIENTS "uniform sampler2D Ytex;\n",
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{ glsl_func_swizzle, glsl_func_yuv_to_rgb, NULL, },
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{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
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GST_GL_TEXTURE_TARGET_2D
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};
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static const gchar templ_RGB_to_YUY2_UYVY_BODY[] =
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"vec4 texel1, texel2;\n"
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"vec3 yuv, yuv1, yuv2;\n"
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"vec4 yuva, yuv1, yuv2;\n"
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"float fx, dx, fy;\n"
|
||||
/* v_texcoord are normalized, texcoord may not be e.g. rectangle textures */
|
||||
"float inorder = mod (v_texcoord.x * width, 2.0);\n"
|
||||
|
|
@ -487,20 +420,20 @@ static const gchar templ_RGB_to_YUY2_UYVY_BODY[] =
|
|||
"fy = texcoord.y;\n"
|
||||
"texel1 = swizzle(texture2D(tex, vec2(fx, fy)), input_swizzle);\n"
|
||||
"texel2 = swizzle(texture2D(tex, vec2(fx + dx, fy)), input_swizzle);\n"
|
||||
"yuv1 = rgb_to_yuv (texel1.rgb, offset, coeff1, coeff2, coeff3);\n"
|
||||
"yuv2 = rgb_to_yuv (texel2.rgb, offset, coeff1, coeff2, coeff3);\n"
|
||||
"yuv.x = yuv1.x;\n"
|
||||
"yuv.yz = (yuv1.yz + yuv2.yz) * 0.5;\n"
|
||||
"yuv1 = color_matrix_apply(texel1, to_YUV_matrix);\n"
|
||||
"yuv2 = color_matrix_apply(texel2, to_YUV_matrix);\n"
|
||||
"yuva.x = yuv1.x;\n"
|
||||
"yuva.yz = (yuv1.yz + yuv2.yz) * 0.5;\n"
|
||||
"if (inorder < 1.0) {\n"
|
||||
" gl_FragColor = vec4(yuv.%c, yuv.%c, 0.0, 0.0);\n"
|
||||
" gl_FragColor = vec4(yuva.%c, yuva.%c, 0.0, 0.0);\n"
|
||||
"} else {\n"
|
||||
" gl_FragColor = vec4(yuv.%c, yuv.%c, 0.0, 0.0);\n"
|
||||
" gl_FragColor = vec4(yuva.%c, yuva.%c, 0.0, 0.0);\n"
|
||||
"}\n";
|
||||
|
||||
static const struct shader_templ templ_RGB_to_YUY2_UYVY =
|
||||
{ NULL,
|
||||
DEFAULT_UNIFORMS RGB_TO_YUV_COEFFICIENTS "uniform sampler2D tex;\n",
|
||||
{ glsl_func_swizzle, glsl_func_rgb_to_yuv, NULL, },
|
||||
{ glsl_func_swizzle, glsl_func_color_matrix, NULL, },
|
||||
GST_GL_TEXTURE_TARGET_2D
|
||||
};
|
||||
|
||||
|
|
@ -580,6 +513,132 @@ static const GLushort indices[] = { 0, 1, 2, 0, 2, 3 };
|
|||
|
||||
/* *INDENT-ON* */
|
||||
|
||||
typedef struct
|
||||
{
|
||||
double dm[4][4];
|
||||
} Matrix4;
|
||||
|
||||
static void
|
||||
matrix_debug (const Matrix4 * s)
|
||||
{
|
||||
GST_DEBUG ("[%f %f %f %f]", s->dm[0][0], s->dm[0][1], s->dm[0][2],
|
||||
s->dm[0][3]);
|
||||
GST_DEBUG ("[%f %f %f %f]", s->dm[1][0], s->dm[1][1], s->dm[1][2],
|
||||
s->dm[1][3]);
|
||||
GST_DEBUG ("[%f %f %f %f]", s->dm[2][0], s->dm[2][1], s->dm[2][2],
|
||||
s->dm[2][3]);
|
||||
GST_DEBUG ("[%f %f %f %f]", s->dm[3][0], s->dm[3][1], s->dm[3][2],
|
||||
s->dm[3][3]);
|
||||
}
|
||||
|
||||
static void
|
||||
matrix_to_float (const Matrix4 * m, float *ret)
|
||||
{
|
||||
int i, j;
|
||||
|
||||
for (i = 0; i < 4; i++) {
|
||||
for (j = 0; j < 4; j++) {
|
||||
ret[j * 4 + i] = m->dm[i][j];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
matrix_set_identity (Matrix4 * m)
|
||||
{
|
||||
int i, j;
|
||||
|
||||
for (i = 0; i < 4; i++) {
|
||||
for (j = 0; j < 4; j++) {
|
||||
m->dm[i][j] = (i == j);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
matrix_copy (Matrix4 * d, const Matrix4 * s)
|
||||
{
|
||||
gint i, j;
|
||||
|
||||
for (i = 0; i < 4; i++)
|
||||
for (j = 0; j < 4; j++)
|
||||
d->dm[i][j] = s->dm[i][j];
|
||||
}
|
||||
|
||||
/* Perform 4x4 matrix multiplication:
|
||||
* - @dst@ = @a@ * @b@
|
||||
* - @dst@ may be a pointer to @a@ andor @b@
|
||||
*/
|
||||
static void
|
||||
matrix_multiply (Matrix4 * dst, Matrix4 * a, Matrix4 * b)
|
||||
{
|
||||
Matrix4 tmp;
|
||||
int i, j, k;
|
||||
|
||||
for (i = 0; i < 4; i++) {
|
||||
for (j = 0; j < 4; j++) {
|
||||
double x = 0;
|
||||
for (k = 0; k < 4; k++) {
|
||||
x += a->dm[i][k] * b->dm[k][j];
|
||||
}
|
||||
tmp.dm[i][j] = x;
|
||||
}
|
||||
}
|
||||
matrix_copy (dst, &tmp);
|
||||
}
|
||||
|
||||
#if 0
|
||||
static void
|
||||
matrix_invert (Matrix4 * d, Matrix4 * s)
|
||||
{
|
||||
Matrix4 tmp;
|
||||
int i, j;
|
||||
double det;
|
||||
|
||||
matrix_set_identity (&tmp);
|
||||
for (j = 0; j < 3; j++) {
|
||||
for (i = 0; i < 3; i++) {
|
||||
tmp.dm[j][i] =
|
||||
s->dm[(i + 1) % 3][(j + 1) % 3] * s->dm[(i + 2) % 3][(j + 2) % 3] -
|
||||
s->dm[(i + 1) % 3][(j + 2) % 3] * s->dm[(i + 2) % 3][(j + 1) % 3];
|
||||
}
|
||||
}
|
||||
det =
|
||||
tmp.dm[0][0] * s->dm[0][0] + tmp.dm[0][1] * s->dm[1][0] +
|
||||
tmp.dm[0][2] * s->dm[2][0];
|
||||
for (j = 0; j < 3; j++) {
|
||||
for (i = 0; i < 3; i++) {
|
||||
tmp.dm[i][j] /= det;
|
||||
}
|
||||
}
|
||||
matrix_copy (d, &tmp);
|
||||
}
|
||||
#endif
|
||||
static void
|
||||
matrix_offset_components (Matrix4 * m, double a1, double a2, double a3)
|
||||
{
|
||||
Matrix4 a;
|
||||
|
||||
matrix_set_identity (&a);
|
||||
a.dm[0][3] = a1;
|
||||
a.dm[1][3] = a2;
|
||||
a.dm[2][3] = a3;
|
||||
matrix_debug (&a);
|
||||
matrix_multiply (m, &a, m);
|
||||
}
|
||||
|
||||
static void
|
||||
matrix_scale_components (Matrix4 * m, double a1, double a2, double a3)
|
||||
{
|
||||
Matrix4 a;
|
||||
|
||||
matrix_set_identity (&a);
|
||||
a.dm[0][0] = a1;
|
||||
a.dm[1][1] = a2;
|
||||
a.dm[2][2] = a3;
|
||||
matrix_multiply (m, &a, m);
|
||||
}
|
||||
|
||||
struct ConvertInfo
|
||||
{
|
||||
gint in_n_textures;
|
||||
|
|
@ -588,10 +647,8 @@ struct ConvertInfo
|
|||
gchar *frag_body;
|
||||
gchar *frag_prog;
|
||||
const gchar *shader_tex_names[GST_VIDEO_MAX_PLANES];
|
||||
gfloat *cms_offset;
|
||||
gfloat *cms_coeff1; /* r,y */
|
||||
gfloat *cms_coeff2; /* g,u */
|
||||
gfloat *cms_coeff3; /* b,v */
|
||||
Matrix4 to_RGB_matrix;
|
||||
Matrix4 to_YUV_matrix;
|
||||
gfloat chroma_sampling[2];
|
||||
int input_swizzle[GST_VIDEO_MAX_PLANES];
|
||||
int output_swizzle[GST_VIDEO_MAX_PLANES];
|
||||
|
|
@ -599,6 +656,128 @@ struct ConvertInfo
|
|||
gfloat out_bitdepth_factor;
|
||||
};
|
||||
|
||||
static void
|
||||
matrix_YCbCr_to_RGB (Matrix4 * m, double Kr, double Kb)
|
||||
{
|
||||
double Kg = 1.0 - Kr - Kb;
|
||||
Matrix4 k = {
|
||||
{
|
||||
{1., 0., 2 * (1 - Kr), 0.},
|
||||
{1., -2 * Kb * (1 - Kb) / Kg, -2 * Kr * (1 - Kr) / Kg, 0.},
|
||||
{1., 2 * (1 - Kb), 0., 0.},
|
||||
{0., 0., 0., 1.},
|
||||
}
|
||||
};
|
||||
|
||||
matrix_multiply (m, &k, m);
|
||||
}
|
||||
|
||||
static void
|
||||
convert_to_RGB (struct ConvertInfo *conv, GstVideoInfo * info)
|
||||
{
|
||||
Matrix4 *m = &conv->to_RGB_matrix;
|
||||
|
||||
{
|
||||
const GstVideoFormatInfo *uinfo;
|
||||
gint offset[4], scale[4], depth[4];
|
||||
int i;
|
||||
|
||||
uinfo = gst_video_format_get_info (GST_VIDEO_INFO_FORMAT (info));
|
||||
|
||||
/* bring color components to [0..1.0] range */
|
||||
gst_video_color_range_offsets (info->colorimetry.range, uinfo, offset,
|
||||
scale);
|
||||
|
||||
for (i = 0; i < uinfo->n_components; i++)
|
||||
depth[i] = (1 << uinfo->depth[i]) - 1;
|
||||
|
||||
matrix_offset_components (m, -offset[0] / (float) depth[0],
|
||||
-offset[1] / (float) depth[1], -offset[2] / (float) depth[2]);
|
||||
matrix_scale_components (m, depth[0] / ((float) scale[0]),
|
||||
depth[1] / ((float) scale[1]), depth[2] / ((float) scale[2]));
|
||||
GST_DEBUG ("to RGB scale/offset matrix");
|
||||
matrix_debug (m);
|
||||
}
|
||||
|
||||
if (GST_VIDEO_INFO_IS_YUV (info)) {
|
||||
gdouble Kr, Kb;
|
||||
|
||||
if (gst_video_color_matrix_get_Kr_Kb (info->colorimetry.matrix, &Kr, &Kb))
|
||||
matrix_YCbCr_to_RGB (m, Kr, Kb);
|
||||
GST_DEBUG ("to RGB matrix");
|
||||
matrix_debug (m);
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
matrix_RGB_to_YCbCr (Matrix4 * m, double Kr, double Kb)
|
||||
{
|
||||
double Kg = 1.0 - Kr - Kb;
|
||||
Matrix4 k;
|
||||
double x;
|
||||
|
||||
k.dm[0][0] = Kr;
|
||||
k.dm[0][1] = Kg;
|
||||
k.dm[0][2] = Kb;
|
||||
k.dm[0][3] = 0;
|
||||
|
||||
x = 1 / (2 * (1 - Kb));
|
||||
k.dm[1][0] = -x * Kr;
|
||||
k.dm[1][1] = -x * Kg;
|
||||
k.dm[1][2] = x * (1 - Kb);
|
||||
k.dm[1][3] = 0;
|
||||
|
||||
x = 1 / (2 * (1 - Kr));
|
||||
k.dm[2][0] = x * (1 - Kr);
|
||||
k.dm[2][1] = -x * Kg;
|
||||
k.dm[2][2] = -x * Kb;
|
||||
k.dm[2][3] = 0;
|
||||
|
||||
k.dm[3][0] = 0;
|
||||
k.dm[3][1] = 0;
|
||||
k.dm[3][2] = 0;
|
||||
k.dm[3][3] = 1;
|
||||
|
||||
matrix_multiply (m, &k, m);
|
||||
}
|
||||
|
||||
static void
|
||||
convert_to_YUV (struct ConvertInfo *conv, GstVideoInfo * info)
|
||||
{
|
||||
Matrix4 *m = &conv->to_YUV_matrix;
|
||||
|
||||
if (GST_VIDEO_INFO_IS_YUV (info)) {
|
||||
gdouble Kr, Kb;
|
||||
|
||||
if (gst_video_color_matrix_get_Kr_Kb (info->colorimetry.matrix, &Kr, &Kb))
|
||||
matrix_RGB_to_YCbCr (m, Kr, Kb);
|
||||
GST_DEBUG ("to YUV matrix");
|
||||
matrix_debug (m);
|
||||
}
|
||||
|
||||
{
|
||||
const GstVideoFormatInfo *uinfo;
|
||||
gint offset[4], scale[4], depth[4];
|
||||
int i;
|
||||
|
||||
uinfo = gst_video_format_get_info (GST_VIDEO_INFO_FORMAT (info));
|
||||
|
||||
/* bring color components to nominal range */
|
||||
gst_video_color_range_offsets (info->colorimetry.range, uinfo, offset,
|
||||
scale);
|
||||
|
||||
for (i = 0; i < uinfo->n_components; i++)
|
||||
depth[i] = (1 << uinfo->depth[i]) - 1;
|
||||
|
||||
matrix_scale_components (m, scale[0] / (float) depth[0],
|
||||
scale[1] / (float) depth[1], scale[2] / (float) depth[2]);
|
||||
matrix_offset_components (m, offset[0] / (float) depth[0],
|
||||
offset[1] / (float) depth[1], offset[2] / (float) depth[2]);
|
||||
GST_DEBUG ("to YUV scale/offset matrix");
|
||||
matrix_debug (m);
|
||||
}
|
||||
}
|
||||
|
||||
struct _GstGLColorConvertPrivate
|
||||
{
|
||||
gboolean result;
|
||||
|
|
@ -2058,19 +2237,7 @@ _YUV_to_RGB (GstGLColorConvert * convert)
|
|||
}
|
||||
}
|
||||
|
||||
if (gst_video_colorimetry_matches (&convert->in_info.colorimetry,
|
||||
GST_VIDEO_COLORIMETRY_BT709)) {
|
||||
info->cms_offset = (gfloat *) from_yuv_bt709_offset;
|
||||
info->cms_coeff1 = (gfloat *) from_yuv_bt709_rcoeff;
|
||||
info->cms_coeff2 = (gfloat *) from_yuv_bt709_gcoeff;
|
||||
info->cms_coeff3 = (gfloat *) from_yuv_bt709_bcoeff;
|
||||
} else {
|
||||
/* defaults/bt601 */
|
||||
info->cms_offset = (gfloat *) from_yuv_bt601_offset;
|
||||
info->cms_coeff1 = (gfloat *) from_yuv_bt601_rcoeff;
|
||||
info->cms_coeff2 = (gfloat *) from_yuv_bt601_gcoeff;
|
||||
info->cms_coeff3 = (gfloat *) from_yuv_bt601_bcoeff;
|
||||
}
|
||||
convert_to_RGB (info, &convert->in_info);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -2171,6 +2338,18 @@ _RGB_to_YUV (GstGLColorConvert * convert)
|
|||
info->chroma_sampling[1] = 1.0f;
|
||||
} else {
|
||||
info->chroma_sampling[0] = info->chroma_sampling[1] = 2.0f;
|
||||
break;
|
||||
case GST_VIDEO_FORMAT_NV21:
|
||||
case GST_VIDEO_FORMAT_NV61:
|
||||
info->templ = &templ_RGB_to_SEMI_PLANAR_YUV;
|
||||
info->frag_body = g_strdup_printf (templ_RGB_to_SEMI_PLANAR_YUV_BODY, "");
|
||||
if (out_format == GST_VIDEO_FORMAT_NV61) {
|
||||
info->chroma_sampling[0] = 2.0f;
|
||||
info->chroma_sampling[1] = 1.0f;
|
||||
} else {
|
||||
info->chroma_sampling[0] = info->chroma_sampling[1] = 2.0f;
|
||||
}
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case GST_VIDEO_FORMAT_AV12:
|
||||
|
|
@ -2179,35 +2358,11 @@ _RGB_to_YUV (GstGLColorConvert * convert)
|
|||
"gl_FragData[2] = vec4(yuva.a, 0.0, 0.0, 1.0);\n");
|
||||
info->chroma_sampling[0] = info->chroma_sampling[1] = 2.0f;
|
||||
break;
|
||||
case GST_VIDEO_FORMAT_NV21:
|
||||
case GST_VIDEO_FORMAT_NV61:
|
||||
info->templ = &templ_RGB_to_SEMI_PLANAR_YUV;
|
||||
info->frag_body = g_strdup_printf (templ_RGB_to_SEMI_PLANAR_YUV_BODY, "");
|
||||
if (out_format == GST_VIDEO_FORMAT_NV61) {
|
||||
info->chroma_sampling[0] = 2.0f;
|
||||
info->chroma_sampling[1] = 1.0f;
|
||||
} else {
|
||||
info->chroma_sampling[0] = info->chroma_sampling[1] = 2.0f;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
if (gst_video_colorimetry_matches (&convert->out_info.colorimetry,
|
||||
GST_VIDEO_COLORIMETRY_BT709)) {
|
||||
info->cms_offset = (gfloat *) from_rgb_bt709_offset;
|
||||
info->cms_coeff1 = (gfloat *) from_rgb_bt709_ycoeff;
|
||||
info->cms_coeff2 = (gfloat *) from_rgb_bt709_ucoeff;
|
||||
info->cms_coeff3 = (gfloat *) from_rgb_bt709_vcoeff;
|
||||
} else {
|
||||
/* defaults/bt601 */
|
||||
info->cms_offset = (gfloat *) from_rgb_bt601_offset;
|
||||
info->cms_coeff1 = (gfloat *) from_rgb_bt601_ycoeff;
|
||||
info->cms_coeff2 = (gfloat *) from_rgb_bt601_ucoeff;
|
||||
info->cms_coeff3 = (gfloat *) from_rgb_bt601_vcoeff;
|
||||
}
|
||||
|
||||
convert_to_YUV (info, &convert->out_info);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -2522,6 +2677,9 @@ _init_convert (GstGLColorConvert * convert)
|
|||
info->out_n_textures =
|
||||
_get_n_textures (GST_VIDEO_INFO_FORMAT (&convert->out_info));
|
||||
|
||||
matrix_set_identity (&info->to_RGB_matrix);
|
||||
matrix_set_identity (&info->to_YUV_matrix);
|
||||
|
||||
if (GST_VIDEO_INFO_IS_RGB (&convert->in_info)) {
|
||||
if (GST_VIDEO_INFO_IS_RGB (&convert->out_info)) {
|
||||
_RGB_to_RGB (convert);
|
||||
|
|
@ -2592,16 +2750,14 @@ _init_convert (GstGLColorConvert * convert)
|
|||
|
||||
gst_gl_shader_use (convert->shader);
|
||||
|
||||
if (info->cms_offset && info->cms_coeff1
|
||||
&& info->cms_coeff2 && info->cms_coeff3) {
|
||||
gst_gl_shader_set_uniform_3fv (convert->shader, "offset", 1,
|
||||
info->cms_offset);
|
||||
gst_gl_shader_set_uniform_3fv (convert->shader, "coeff1", 1,
|
||||
info->cms_coeff1);
|
||||
gst_gl_shader_set_uniform_3fv (convert->shader, "coeff2", 1,
|
||||
info->cms_coeff2);
|
||||
gst_gl_shader_set_uniform_3fv (convert->shader, "coeff3", 1,
|
||||
info->cms_coeff3);
|
||||
{
|
||||
gfloat m[16];
|
||||
matrix_to_float (&info->to_RGB_matrix, m);
|
||||
gst_gl_shader_set_uniform_matrix_4fv (convert->shader, "to_RGB_matrix", 1,
|
||||
FALSE, m);
|
||||
matrix_to_float (&info->to_YUV_matrix, m);
|
||||
gst_gl_shader_set_uniform_matrix_4fv (convert->shader, "to_YUV_matrix", 1,
|
||||
FALSE, m);
|
||||
}
|
||||
|
||||
for (i = info->in_n_textures - 1; i >= 0; i--) {
|
||||
|
|
@ -3190,6 +3346,18 @@ gst_gl_color_convert_swizzle_shader_string (GstGLContext * context)
|
|||
return g_strdup (glsl_func_swizzle);
|
||||
}
|
||||
|
||||
/* *INDENT-OFF* */
|
||||
static const char glsl_func_yuv_to_rgb[] =
|
||||
"vec3 yuv_to_rgb (vec3 yuv, vec3 offset, vec3 ycoeff, vec3 ucoeff, vec3 vcoeff) {\n"
|
||||
" vec3 rgb;\n"
|
||||
" yuv += offset;\n"
|
||||
" rgb.r = dot(yuv, ycoeff);\n"
|
||||
" rgb.g = dot(yuv, ucoeff);\n"
|
||||
" rgb.b = dot(yuv, vcoeff);\n"
|
||||
" return rgb;\n"
|
||||
"}\n";
|
||||
/* *INDENT-ON* */
|
||||
|
||||
/**
|
||||
* gst_gl_color_convert_yuv_to_rgb_shader_string:
|
||||
* @context: a #GstGLContext
|
||||
|
|
|
|||
Loading…
Reference in a new issue