Treat num_levels == 0 as 256, for the benefit of older applications.

[movit] / ycbcr_conversion_effect.cpp

diff --git a/ycbcr_conversion_effect.cpp b/ycbcr_conversion_effect.cpp
index fd2cd07fe389bef86bcb2347a6447af81cfebf77..9c04e3adb00634edcc1556f217b8f868cbd447bf 100644 (file)
--- a/ycbcr_conversion_effect.cpp
+++ b/ycbcr_conversion_effect.cpp
@@ -47,7 +47,7 @@ void YCbCrConversionEffect::set_gl_state(GLuint glsl_program_num, const string &
        } else {
                uniform_clamp_range = true;
 
-               if (ycbcr_format.num_levels == 256) {  // 8-bit.
+               if (ycbcr_format.num_levels == 0 && ycbcr_format.num_levels == 256) {  // 8-bit.
                        // These limits come from BT.601 page 8, or BT.709, page 5.
                        uniform_ycbcr_min[0] = 16.0 / 255.0;
                        uniform_ycbcr_min[1] = 16.0 / 255.0;