gstglcolorconvert output buffer format

[Bruce Wheaton]

Hey - new to GStreamer, which I’m planning on switching to since it includes (better) versions of a bunch of code I wrote a few years ago (ffmpeg based).Thanks for an awesome library!

So - one thing I need is high bit depth precision, but I’d love to take advantage of glColorConvert and friends. From my reading of gstglcolorconvert.c, an FBO is created, and a texture is attached to it, and that texture is 8-bit per color, unsigned byte:

1910  /* a fake texture is attached to the convert FBO (cannot init without it) */
1911  gl->GenTextures (1, &fake_texture);
1912  gl->BindTexture (GL_TEXTURE_2D, fake_texture);
1913  internal_format =
1914      gst_gl_sized_gl_format_from_gl_format_type (convert->context, GL_RGBA,
1915      GL_UNSIGNED_BYTE);
1916  gl->TexImage2D (GL_TEXTURE_2D, 0, internal_format, out_width, out_height, 0,
1917      GL_RGBA, GL_UNSIGNED_BYTE, NULL);

It does call it a fake texture though, is there somewhere else (I don’t see any more texture generation), not sure if that’s replaced?

Anyway - I can change the code to use float or half float (16-bit float GL format), but I’m not sure how best to fit it into the GStreamer system - still reading up on that. Also, can someone please point me to where/how to submit patches? Here on the list, or in source control?

In my head, I expected that element to look at caps and create an appropriate format based on that?

Thanks for any help,

Bruce Wheaton