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[754/906] gldownload: Add support for RGB reordering when using GLES2

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This commit is contained in:
Sebastian Dröge 2013-07-15 17:08:42 +02:00 committed by Matthew Waters
parent f4e76a9367
commit 743ad83b06
2 changed files with 146 additions and 121 deletions
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129
gst-libs/gst/gl/gstgldownload.c
View file

@ -195,6 +195,18 @@ static const gchar *text_shader_AYUV_gles2 =
" gl_FragColor=vec4(1.0,y,u,v);\n"
"}\n";
static const gchar *text_shader_ARGB_gles2 =
"precision mediump float;\n"
"varying vec2 v_texCoord;\n"
"uniform sampler2D tex;\n"
"void main(void) {\n"
" vec4 rgba;\n"
" vec2 nxy = v_texCoord.xy;\n"
" rgba.rgb=texture2D(tex,nxy).rgb;\n"
" rgba.a = 1.0;\n"
" gl_FragColor=vec4(rgba.%c,rgba.%c,rgba.%c,rgba.%c);\n"
"}\n";
static const gchar *text_vertex_shader_gles2 =
"attribute vec4 a_position; \n"
"attribute vec2 a_texCoord; \n"
@ -208,10 +220,10 @@ static const gchar *text_vertex_shader_gles2 =
static const gchar *text_shader_RGB_gles2 =
"precision mediump float; \n"
"varying vec2 v_texCoord; \n"
"uniform sampler2D s_texture; \n"
"uniform sampler2D tex; \n"
"void main() \n"
"{ \n"
" gl_FragColor = texture2D( s_texture, v_texCoord );\n"
" gl_FragColor = texture2D(tex, v_texCoord ); \n"
"} \n";
#endif /* GST_GL_HAVE_GLES2 */
@ -222,6 +234,7 @@ struct _GstGLDownloadPrivate
const gchar *YUY2_UYVY;
const gchar *I420_YV12;
const gchar *AYUV;
const gchar *ARGB;
const gchar *vert_shader;
void (*do_rgb) (GstGLDisplay * display, GstGLDownload * download);
@ -292,6 +305,7 @@ gst_gl_download_new (GstGLDisplay * display)
priv->YUY2_UYVY = text_shader_YUY2_UYVY_opengl;
priv->I420_YV12 = text_shader_I420_YV12_opengl;
priv->AYUV = text_shader_AYUV_opengl;
priv->ARGB = NULL;
priv->vert_shader = text_vertex_shader_opengl;
priv->do_rgb = _do_download_draw_rgb_opengl;
priv->do_yuv = _do_download_draw_yuv_opengl;
@ -302,6 +316,7 @@ gst_gl_download_new (GstGLDisplay * display)
priv->YUY2_UYVY = text_shader_YUY2_UYVY_gles2;
priv->I420_YV12 = text_shader_I420_YV12_gles2;
priv->AYUV = text_shader_AYUV_gles2;
priv->ARGB = text_shader_ARGB_gles2;
priv->vert_shader = text_vertex_shader_gles2;
priv->do_rgb = _do_download_draw_rgb_gles2;
priv->do_yuv = _do_download_draw_yuv_gles2;
@ -653,7 +668,8 @@ _init_download (GstGLDisplay * display, GstGLDownload * download)
out_width = GST_VIDEO_INFO_WIDTH (&download->info);
out_height = GST_VIDEO_INFO_HEIGHT (&download->info);
GST_TRACE ("initializing texture download for format %d", v_format);
GST_TRACE ("initializing texture download for format %s",
gst_video_format_to_string (v_format));
if (USING_OPENGL (display)) {
switch (v_format) {
@ -847,6 +863,9 @@ _init_download_shader (GstGLDisplay * display, GstGLDownload * download)
gl = display->gl_vtable;
v_format = GST_VIDEO_INFO_FORMAT (&download->info);
if (GST_VIDEO_FORMAT_INFO_IS_RGB (download->info.finfo)
&& !USING_GLES2 (display)) {
switch (v_format) {
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
@ -858,31 +877,15 @@ _init_download_shader (GstGLDisplay * display, GstGLDownload * download)
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
/* color space conversion is not needed */
#if GST_GL_HAVE_GLES2
{
if (USING_GLES2 (display)) {
/* glGetTexImage2D not available in OpenGL ES 2.0 */
if (_create_shader (display, text_vertex_shader_gles2,
text_shader_RGB_gles2, &download->shader)) {
download->shader_attr_position_loc =
gst_gl_shader_get_attribute_location (download->shader,
"a_position");
download->shader_attr_texture_loc =
gst_gl_shader_get_attribute_location (download->shader,
"a_texCoord");
}
}
}
#endif
return;
break;
case GST_VIDEO_FORMAT_YUY2:
case GST_VIDEO_FORMAT_UYVY:
case GST_VIDEO_FORMAT_I420:
case GST_VIDEO_FORMAT_YV12:
case GST_VIDEO_FORMAT_AYUV:
default:
break;
}
}
/* color space conversion is needed */
{
/* check if fragment shader is available, then load them
* GLSL is a requirement for download
*/
@ -956,6 +959,49 @@ _init_download_shader (GstGLDisplay * display, GstGLDownload * download)
}
break;
}
case GST_VIDEO_FORMAT_RGBx:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_ARGB:
case GST_VIDEO_FORMAT_ABGR:
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
{
gchar text_shader_ARGB[2048];
switch (v_format) {
case GST_VIDEO_FORMAT_BGR:
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_BGRA:
sprintf (text_shader_ARGB, download->priv->ARGB, 'b', 'g', 'r', 'a');
break;
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ARGB:
sprintf (text_shader_ARGB, download->priv->ARGB, 'a', 'r', 'g', 'b');
break;
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_ABGR:
sprintf (text_shader_ARGB, download->priv->ARGB, 'a', 'b', 'g', 'r');
break;
default:
sprintf (text_shader_ARGB, text_shader_RGB_gles2);
break;
}
if (_create_shader (display, download->priv->vert_shader,
text_shader_ARGB, &download->shader)) {
download->shader_attr_position_loc =
gst_gl_shader_get_attribute_location (download->shader,
"a_position");
download->shader_attr_texture_loc =
gst_gl_shader_get_attribute_location (download->shader,
"a_texCoord");
}
break;
}
default:
gst_gl_display_set_error (display,
"Unsupported download video format %d", v_format);
@ -963,14 +1009,6 @@ _init_download_shader (GstGLDisplay * display, GstGLDownload * download)
break;
}
}
break;
default:
gst_gl_display_set_error (display, "Unsupported download video format %d",
v_format);
g_assert_not_reached ();
break;
}
}
/* Called in the gl thread */
static void
@ -1126,7 +1164,7 @@ _do_download_draw_rgb_gles2 (GstGLDisplay * display, GstGLDownload * download)
gl->EnableVertexAttribArray (download->shader_attr_texture_loc);
gl->ActiveTexture (GL_TEXTURE0);
gst_gl_shader_set_uniform_1i (download->shader, "s_texture", 0);
gst_gl_shader_set_uniform_1i (download->shader, "tex", 0);
gl->BindTexture (GL_TEXTURE_RECTANGLE_ARB, download->in_texture);
gl->DrawElements (GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, indices);
@ -1138,28 +1176,19 @@ _do_download_draw_rgb_gles2 (GstGLDisplay * display, GstGLDownload * download)
switch (v_format) {
case GST_VIDEO_FORMAT_RGBA:
case GST_VIDEO_FORMAT_RGBx:
gl->ReadPixels (0, 0, out_width, out_height, GL_RGBA, GL_UNSIGNED_BYTE,
download->data[0]);
break;
case GST_VIDEO_FORMAT_xRGB:
case GST_VIDEO_FORMAT_ARGB:
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
gl->ReadPixels (0, 0, out_width, out_height, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8, download->data[0]);
#else
gl->ReadPixels (0, 0, out_width, out_eight, GL_BGRA,
GL_UNSIGNED_INT_8_8_8_8_REV, download->data[0]);
#endif /* G_BYTE_ORDER */
break;
case GST_VIDEO_FORMAT_RGB:
gl->ReadPixels (0, 0, out_width, out_height, GL_RGB, GL_UNSIGNED_BYTE,
download->data[0]);
break;
case GST_VIDEO_FORMAT_BGRx:
case GST_VIDEO_FORMAT_BGRA:
case GST_VIDEO_FORMAT_xBGR:
case GST_VIDEO_FORMAT_ABGR:
gl->ReadPixels (0, 0, out_width, out_height, GL_RGBA, GL_UNSIGNED_BYTE,
download->data[0]);
break;
case GST_VIDEO_FORMAT_RGB:
case GST_VIDEO_FORMAT_BGR:
gl->ReadPixels (0, 0, out_width, out_height, GL_RGB, GL_UNSIGNED_BYTE,
download->data[0]);
break;
default:
gst_gl_display_set_error (display,

4
gst-libs/gst/gl/gstgldownload.h
View file

@ -89,12 +89,8 @@ struct _GstGLDownloadClass
*
* The currently supported formats that can be downloaded
*/
#if !GST_GL_HAVE_GLES2
# define GST_GL_DOWNLOAD_FORMATS "{ RGB, RGBx, RGBA, BGR, BGRx, BGRA, xRGB, " \
"xBGR, ARGB, ABGR, I420, YV12, YUY2, UYVY, AYUV }"
#else /* GST_GL_HAVE_GLES2 */
# define GST_GL_DOWNLOAD_FORMATS "{ RGB, RGBx, RGBA, I420, YV12, YUY2, UYVY, AYUV }"
#endif /* !GST_GL_HAVE_GLES2 */
/**
* GST_GL_DOWNLOAD_VIDEO_CAPS: