Some restructuring in the offsets to make it less cryptic.

diff --git a/mixer.cpp b/mixer.cpp
index 7a084d94088b8655dd4a95e87d589c4a5e456eb0..7ed09e20b06ccf36bbddf754753662f260cb0d27 100644 (file)
--- a/mixer.cpp
+++ b/mixer.cpp
@@ -334,13 +334,18 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
        //check_error();
 
        // Upload the textures.
-       glBindTexture(GL_TEXTURE_2D, userdata->tex_y);
+       size_t skipped_lines = 25;
+       size_t cbcr_width = WIDTH / 2;
+       size_t cbcr_offset = video_offset / 2;
+       size_t y_offset = cbcr_offset + cbcr_width * (HEIGHT + EXTRAHEIGHT) * sizeof(uint16_t) + video_offset / 2;
+
+       glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr);
        check_error();
-       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH, HEIGHT, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET((WIDTH * (HEIGHT+EXTRAHEIGHT) * 2 + 44) / 2 + WIDTH * 25 + video_offset/2));
+       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, cbcr_width, HEIGHT, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(cbcr_offset + cbcr_width * skipped_lines * sizeof(uint16_t)));
        check_error();
-       glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr);
+       glBindTexture(GL_TEXTURE_2D, userdata->tex_y);
        check_error();
-       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH/2, HEIGHT, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(WIDTH * 25 + video_offset/2));
+       glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH, HEIGHT, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(y_offset + WIDTH * skipped_lines));
        check_error();
        glBindTexture(GL_TEXTURE_2D, 0);
        check_error();