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gl/upload: add support for the bt709 color matrix

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This commit is contained in:
Matthew Waters 2014-03-25 00:34:13 +11:00
parent 9908375fc0
commit 6d452f60ee
1 changed files with 50 additions and 17 deletions
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67
gst-libs/gst/gl/gstglupload.c
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@ -1,6 +1,6 @@
/*
* GStreamer
* Copyright (C) 2012 Matthew Waters <ystree00@gmail.com>
* Copyright (C) 2012-2014 Matthew Waters <ystree00@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@ -56,31 +56,31 @@ static gboolean _do_upload_draw (GstGLContext * context, GstGLUpload * upload);
/* *INDENT-OFF* */
#define YUV_TO_RGB_COEFFICIENTS \
"uniform vec3 offset;\n" \
"uniform vec3 rcoeff;\n" \
"uniform vec3 gcoeff;\n" \
"uniform vec3 bcoeff;\n"
/* FIXME: use the colormatrix support from videoconvert */
/* BT. 601 standard with the following ranges:
* Y = [16..235] (of 255)
* Cb/Cr = [16..240] (of 255)
*/
#define YUV_TO_RGB_BT601_COEFFICIENTS \
const gfloat[] bt601_offset = {-0.0625f, -0.5, -0.5) \
const gfloat[] bt601_rcoeff = {1.164, 0.000, 1.596} \
const gfloat[] bt601_gcoeff = {1.164,-0.391,-0.813} \
const gfloat[] bt601_bcoeff = {1.164, 2.018, 0.000}
#define YUV_TO_RGB_COEFFICIENTS \
"const vec3 offset = vec3(-0.0625, -0.5, -0.5);\n" \
"const vec3 rcoeff = vec3(1.164, 0.000, 1.596);\n" \
"const vec3 gcoeff = vec3(1.164,-0.391,-0.813);\n" \
"const vec3 bcoeff = vec3(1.164, 2.018, 0.000);\n"
static const gfloat bt601_offset[] = {-0.0625, -0.5, -0.5};
static const gfloat bt601_rcoeff[] = {1.164, 0.000, 1.596};
static const gfloat bt601_gcoeff[] = {1.164,-0.391,-0.813};
static const gfloat bt601_bcoeff[] = {1.164, 2.018, 0.000};
/* BT. 709 standard with the following ranges:
* Y = [16..235] (of 255)
* Cb/Cr = [16..240] (of 255)
*/
#define YUV_TO_RGB_BT709_COEFFICIENTS \
const gfloat[] bt709_offset = {-0.0625, -0.5, -0.5} \
const gfloat[] bt709_rcoeff = {1.164, 0.000, 1.787} \
const gfloat[] bt709_gcoeff = {1.164,-0.213,-0.531} \
const gfloat[] bt709_bcoeff = {1.164,-2.112, 0.000}
static const gfloat bt709_offset[] = {-0.0625, -0.5, -0.5};
static const gfloat bt709_rcoeff[] = {1.164, 0.000, 1.787};
static const gfloat bt709_gcoeff[] = {1.164,-0.213,-0.531};
static const gfloat bt709_bcoeff[] = {1.164,-2.112, 0.000};
/** GRAY16 to RGB conversion
* data transfered as GL_LUMINANCE_ALPHA then convert back to GRAY16
@ -1420,6 +1420,10 @@ _do_upload_draw (GstGLContext * context, GstGLUpload * upload)
GstGLFuncs *gl;
struct TexData *tex = upload->priv->texture_info;
guint out_width, out_height;
const gfloat *cms_offset;
const gfloat *cms_rcoeff;
const gfloat *cms_gcoeff;
const gfloat *cms_bcoeff;
gint i;
GLint viewport_dim[4];
@ -1441,6 +1445,26 @@ _do_upload_draw (GstGLContext * context, GstGLUpload * upload)
out_width = GST_VIDEO_INFO_WIDTH (&upload->out_info);
out_height = GST_VIDEO_INFO_HEIGHT (&upload->out_info);
if (gst_video_colorimetry_matches (&upload->in_info.colorimetry,
GST_VIDEO_COLORIMETRY_BT709)) {
cms_offset = bt709_offset;
cms_rcoeff = bt709_rcoeff;
cms_gcoeff = bt709_gcoeff;
cms_bcoeff = bt709_bcoeff;
} else if (gst_video_colorimetry_matches (&upload->in_info.colorimetry,
GST_VIDEO_COLORIMETRY_BT601)) {
cms_offset = bt601_offset;
cms_rcoeff = bt601_rcoeff;
cms_gcoeff = bt601_gcoeff;
cms_bcoeff = bt601_bcoeff;
} else {
/* defaults */
cms_offset = bt601_offset;
cms_rcoeff = bt601_rcoeff;
cms_gcoeff = bt601_gcoeff;
cms_bcoeff = bt601_bcoeff;
}
gl->BindFramebuffer (GL_FRAMEBUFFER, upload->fbo);
/* setup a texture to render to */
@ -1469,6 +1493,15 @@ _do_upload_draw (GstGLContext * context, GstGLUpload * upload)
gl->EnableVertexAttribArray (upload->shader_attr_position_loc);
gl->EnableVertexAttribArray (upload->shader_attr_texture_loc);
gst_gl_shader_set_uniform_3fv (upload->shader, "offset", 1,
(gfloat *) cms_offset);
gst_gl_shader_set_uniform_3fv (upload->shader, "rcoeff", 1,
(gfloat *) cms_rcoeff);
gst_gl_shader_set_uniform_3fv (upload->shader, "gcoeff", 1,
(gfloat *) cms_gcoeff);
gst_gl_shader_set_uniform_3fv (upload->shader, "bcoeff", 1,
(gfloat *) cms_bcoeff);
for (i = upload->priv->n_textures - 1; i >= 0; i--) {
gchar *scale_name = g_strdup_printf ("tex_scale%u", i);