The NLQ pivots are not documented but should be present
in the header for profile 7 RPU format.
It has been verified using Dolby's verification toolkit.
Signed-off-by: quietvoid <tcchlis...@gmail.com>
---
libavcodec/dovi_rpu.c | 9 ++++++++-
libavutil/dovi_meta.h | 1 +
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/libavcodec/dovi_rpu.c b/libavcodec/dovi_rpu.c
index a87562c8a3..31e87cfbcc 100644
--- a/libavcodec/dovi_rpu.c
+++ b/libavcodec/dovi_rpu.c
@@ -117,7 +117,7 @@ int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame)
/* Copy only the parts of these structs known to us at compiler-time. */
#define COPY(t, a, b, last) memcpy(a, b, offsetof(t, last) + sizeof((b)->last))
COPY(AVDOVIRpuDataHeader, av_dovi_get_header(dovi), &s->header,
disable_residual_flag);
- COPY(AVDOVIDataMapping, av_dovi_get_mapping(dovi), s->mapping,
nlq[2].linear_deadzone_threshold);
+ COPY(AVDOVIDataMapping, av_dovi_get_mapping(dovi), s->mapping,
nlq_pivots[1]);
COPY(AVDOVIColorMetadata, av_dovi_get_color(dovi), s->color,
source_diagonal);
return 0;
}
@@ -315,7 +315,14 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu,
size_t rpu_size)
}
if (use_nlq) {
+ int nlq_pivot = 0;
vdr->mapping.nlq_method_idc = get_bits(gb, 3);
+
+ for (int i = 0; i < 2; i++) {
+ nlq_pivot += get_bits(gb, hdr->bl_bit_depth);
+ vdr->mapping.nlq_pivots[i] = av_clip_uint16(nlq_pivot);
+ }
+
/**
* The patent mentions another legal value, NLQ_MU_LAW, but it's
* not documented anywhere how to parse or apply that type of NLQ.
diff --git a/libavutil/dovi_meta.h b/libavutil/dovi_meta.h
index 3d11e02bff..6afc7b055a 100644
--- a/libavutil/dovi_meta.h
+++ b/libavutil/dovi_meta.h
@@ -147,6 +147,7 @@ typedef struct AVDOVIDataMapping {
uint32_t num_x_partitions;
uint32_t num_y_partitions;
AVDOVINLQParams nlq[3]; /* per component */
+ uint16_t nlq_pivots[2]; /* nlq_pred_pivot_value */
} AVDOVIDataMapping;
/**
--
2.36.1
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