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Issue #2357 - VPXDecoder does not decode alpha frames.

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Another requirement to have transparency in videos. Straight port of Firefox 53 implementation, save for some oddities relating to needing to put uint8_t instead of uint8 in yuv_convert to get this to compile.

Ref: BZ 1321076, 1329104
This commit is contained in:
Jeremy Andrews 2023-10-23 22:20:36 -05:00 • committed by roytam1
commit c0ba3a8d2e
9 changed files with 315 additions and 65 deletions
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21
gfx/ycbcr/yuv_convert.cpp
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@ -550,6 +550,27 @@ void ScaleYCbCrToRGB32_deprecated(const uint8_t* y_buf,
if (has_mmx)
EMMS();
}
void ConvertYCbCrAToARGB32(const uint8_t* y_buf,
const uint8_t* u_buf,
const uint8_t* v_buf,
const uint8_t* a_buf,
uint8_t* argb_buf,
int pic_width,
int pic_height,
int ya_pitch,
int uv_pitch,
int argb_pitch) {
// The downstream graphics stack expects an attenuated input, hence why the
// attenuation parameter is set.
DebugOnly<int> err = libyuv::I420AlphaToARGB(y_buf, ya_pitch,
u_buf, uv_pitch,
v_buf, uv_pitch,
a_buf, ya_pitch,
argb_buf, argb_pitch,
pic_width, pic_height, 1);
MOZ_ASSERT(!err);
}
} // namespace gfx
} // namespace mozilla