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Guess frame color metadata if left unspecified

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Some decoders don't populate metadata, but the renderer may need it
to determine which shader or EGL import parameters to use.
This commit is contained in:
Cameron Gutman
2026-08-05 22:56:34 -05:00
parent fcba7df82c
commit 2bea406f67
1 changed files with 68 additions and 0 deletions
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app/streaming/video/ffmpeg.cpp
+68
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@@ -1946,6 +1946,74 @@ void FFmpegVideoDecoder::decoderThreadProc()
}
}
// Some decoders don't propagate color metadata from the bitstream,
// so we will try to guess it here if it was unset.
if (frame->color_range == AVCOL_RANGE_UNSPECIFIED) {
switch (getDecoderColorRange()) {
case COLOR_RANGE_LIMITED:
frame->color_range = AVCOL_RANGE_MPEG;
break;
case COLOR_RANGE_FULL:
frame->color_range = AVCOL_RANGE_JPEG;
break;
}
}
if (frame->colorspace == AVCOL_SPC_UNSPECIFIED) {
switch (getDecoderColorspace()) {
case COLORSPACE_REC_601:
frame->colorspace = AVCOL_SPC_SMPTE170M;
break;
case COLORSPACE_REC_709:
frame->colorspace = AVCOL_SPC_BT709;
break;
case COLORSPACE_REC_2020:
frame->colorspace = AVCOL_SPC_BT2020_NCL;
break;
}
// HDR forces BT.2020 regardless of decoder preference
if (LiGetCurrentHostDisplayHdrMode()) {
frame->colorspace = AVCOL_SPC_BT2020_NCL;
}
}
if (frame->color_primaries == AVCOL_PRI_UNSPECIFIED) {
switch (frame->colorspace) {
case AVCOL_SPC_BT709:
frame->color_primaries = AVCOL_PRI_BT709;
break;
case AVCOL_SPC_SMPTE170M:
frame->color_primaries = AVCOL_PRI_SMPTE170M;
break;
case AVCOL_SPC_BT2020_NCL:
case AVCOL_SPC_BT2020_CL:
frame->color_primaries = AVCOL_PRI_BT2020;
break;
default:
break;
}
}
if (frame->color_trc == AVCOL_TRC_UNSPECIFIED) {
switch (frame->colorspace) {
case AVCOL_SPC_BT709:
frame->color_trc = AVCOL_TRC_BT709;
break;
case AVCOL_SPC_SMPTE170M:
frame->color_trc = AVCOL_TRC_SMPTE170M;
break;
case AVCOL_SPC_BT2020_NCL:
case AVCOL_SPC_BT2020_CL:
frame->color_trc = AVCOL_TRC_BT2020_10;
break;
default:
break;
}
// HDR forces SMPTE 2084 PQ regardless of decoder preference
if (LiGetCurrentHostDisplayHdrMode()) {
frame->color_trc = AVCOL_TRC_SMPTE2084;
}
}
// Reset failed decodes count if we reached this far
m_ConsecutiveFailedDecodes = 0;