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gl/download: add support for the bt709 color matrix

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Matthew Waters 2014-03-25 00:50:30 +11:00 committed by Tim-Philipp Müller
parent ee0c102ac5
commit adebb3b7f8
1 changed files with 92 additions and 4 deletions
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96
gst-libs/gst/gl/gstgldownload.c
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@ -65,11 +65,33 @@ static void _do_download_draw_yuv_gles2 (GstGLContext * context,
/* *INDENT-OFF* */
/* FIXME: use the colormatrix support from videoconvert */
#define RGB_TO_YUV_COEFFICIENTS \
"const vec3 offset = vec3(0.0625, 0.5, 0.5);\n" \
"const vec3 ycoeff = vec3(0.256816, 0.504154, 0.0979137);\n" \
"const vec3 ucoeff = vec3(-0.148246, -0.29102, 0.439266);\n" \
"const vec3 vcoeff = vec3(0.439271, -0.367833, -0.071438);\n"
"uniform vec3 offset;\n" \
"uniform vec3 ycoeff;\n" \
"uniform vec3 ucoeff;\n" \
"uniform vec3 vcoeff;\n"
/* Matrix inverses of the color matrices found in gstglupload */
/* BT. 601 standard with the following ranges:
* Y = [16..235] (of 255)
* Cb/Cr = [16..240] (of 255)
*/
static const gfloat bt601_offset[] = {0.0625, 0.5, 0.5};
static const gfloat bt601_ycoeff[] = {0.256816, 0.504154, 0.0979137};
static const gfloat bt601_ucoeff[] = {-0.148246, -0.29102, 0.439266};
static const gfloat bt601_vcoeff[] = {0.439271, -0.367833, -0.071438};
/* BT. 709 standard with the following ranges:
* Y = [16..235] (of 255)
* Cb/Cr = [16..240] (of 255)
*/
static const gfloat bt709_offset[] = {0.0625, 0.5, 0.5};
static const gfloat bt709_ycoeff[] = {0.213392, 0.718140,-0.072426};
static const gfloat bt709_ucoeff[] = {0.117608, 0.395793,-0.513401};
static const gfloat bt709_vcoeff[] = {0.420599,-0.467775, 0.047176};
#if GST_GL_HAVE_OPENGL
/* YUY2:y2,u,y1,v
UYVY:v,y1,u,y2 */
@ -1070,6 +1092,10 @@ _do_download_draw_yuv_opengl (GstGLContext * context, GstGLDownload * download)
GstVideoFormat v_format;
guint out_width = GST_VIDEO_INFO_WIDTH (&download->info);
guint out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
const gfloat *cms_offset;
const gfloat *cms_ycoeff;
const gfloat *cms_ucoeff;
const gfloat *cms_vcoeff;
GLenum multipleRT[] = {
GL_COLOR_ATTACHMENT0,
@ -1159,6 +1185,35 @@ _do_download_draw_yuv_opengl (GstGLContext * context, GstGLDownload * download)
"Download video format inconsistensy %d", v_format);
}
if (gst_video_colorimetry_matches (&download->info.colorimetry,
GST_VIDEO_COLORIMETRY_BT709)) {
cms_offset = bt709_offset;
cms_ycoeff = bt709_ycoeff;
cms_ucoeff = bt709_ucoeff;
cms_vcoeff = bt709_vcoeff;
} else if (gst_video_colorimetry_matches (&download->info.colorimetry,
GST_VIDEO_COLORIMETRY_BT601)) {
cms_offset = bt601_offset;
cms_ycoeff = bt601_ycoeff;
cms_ucoeff = bt601_ucoeff;
cms_vcoeff = bt601_vcoeff;
} else {
/* defaults */
cms_offset = bt601_offset;
cms_ycoeff = bt601_ycoeff;
cms_ucoeff = bt601_ucoeff;
cms_vcoeff = bt601_vcoeff;
}
gst_gl_shader_set_uniform_3fv (download->shader, "offset", 1,
(gfloat *) cms_offset);
gst_gl_shader_set_uniform_3fv (download->shader, "ycoeff", 1,
(gfloat *) cms_ycoeff);
gst_gl_shader_set_uniform_3fv (download->shader, "ucoeff", 1,
(gfloat *) cms_ucoeff);
gst_gl_shader_set_uniform_3fv (download->shader, "vcoeff", 1,
(gfloat *) cms_vcoeff);
gl->ClientActiveTexture (GL_TEXTURE0);
gl->EnableClientState (GL_VERTEX_ARRAY);
@ -1269,6 +1324,10 @@ _do_download_draw_yuv_gles2 (GstGLContext * context, GstGLDownload * download)
GstGLFuncs *gl;
GstVideoFormat v_format;
guint out_width, out_height;
const gfloat *cms_offset;
const gfloat *cms_ycoeff;
const gfloat *cms_ucoeff;
const gfloat *cms_vcoeff;
GLint viewport_dim[4];
@ -1347,6 +1406,35 @@ _do_download_draw_yuv_gles2 (GstGLContext * context, GstGLDownload * download)
}
if (gst_video_colorimetry_matches (&download->info.colorimetry,
GST_VIDEO_COLORIMETRY_BT709)) {
cms_offset = bt709_offset;
cms_ycoeff = bt709_ycoeff;
cms_ucoeff = bt709_ucoeff;
cms_vcoeff = bt709_vcoeff;
} else if (gst_video_colorimetry_matches (&download->info.colorimetry,
GST_VIDEO_COLORIMETRY_BT601)) {
cms_offset = bt601_offset;
cms_ycoeff = bt601_ycoeff;
cms_ucoeff = bt601_ucoeff;
cms_vcoeff = bt601_vcoeff;
} else {
/* defaults */
cms_offset = bt601_offset;
cms_ycoeff = bt601_ycoeff;
cms_ucoeff = bt601_ucoeff;
cms_vcoeff = bt601_vcoeff;
}
gst_gl_shader_set_uniform_3fv (download->shader, "offset", 1,
(gfloat *) cms_offset);
gst_gl_shader_set_uniform_3fv (download->shader, "ycoeff", 1,
(gfloat *) cms_ycoeff);
gst_gl_shader_set_uniform_3fv (download->shader, "ucoeff", 1,
(gfloat *) cms_ucoeff);
gst_gl_shader_set_uniform_3fv (download->shader, "vcoeff", 1,
(gfloat *) cms_vcoeff);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
/* don't check if GLSL is available