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swscale/utils: read HDR mastering metadata from AVFrame

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This commit is contained in:
Niklas Haas 2024-11-30 14:50:07 +01:00
parent 5b21b7f52c
commit 7432fa19cd
1 changed files with 25 additions and 0 deletions
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25
libswscale/utils.c
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@ -46,6 +46,7 @@
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/libm.h"
#include "libavutil/mastering_display_metadata.h"
#include "libavutil/mathematics.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
@ -2655,6 +2656,7 @@ SwsFormat ff_fmt_from_frame(const AVFrame *frame, int field)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
const AVColorPrimariesDesc *primaries;
AVFrameSideData *sd;
SwsFormat fmt = {
.width = frame->width,
@ -2727,6 +2729,29 @@ SwsFormat ff_fmt_from_frame(const AVFrame *frame, int field)
if (primaries)
fmt.color.gamut = primaries->prim;
if ((sd = av_frame_get_side_data(frame, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA))) {
const AVMasteringDisplayMetadata *mdm = (const AVMasteringDisplayMetadata *) sd->data;
if (mdm->has_luminance) {
fmt.color.min_luma = mdm->min_luminance;
fmt.color.max_luma = mdm->max_luminance;
}
if (mdm->has_primaries) {
/* Ignore mastering display white point as it has no bearance on
* the underlying content */
fmt.color.gamut.r.x = mdm->display_primaries[0][0];
fmt.color.gamut.r.y = mdm->display_primaries[0][1];
fmt.color.gamut.g.x = mdm->display_primaries[1][0];
fmt.color.gamut.g.y = mdm->display_primaries[1][1];
fmt.color.gamut.b.x = mdm->display_primaries[2][0];
fmt.color.gamut.b.y = mdm->display_primaries[2][1];
}
}
/* PQ is always scaled down to absolute zero, so ignore mastering metadata */
if (fmt.color.trc == AVCOL_TRC_SMPTE2084)
fmt.color.min_luma = av_make_q(0, 1);
return fmt;
}