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avcodec/dovi_rpudec: simplify vdr handling (cosmetic)

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Move `vdr` into local scope and point only to the field we actually care
about.
This commit is contained in:
Niklas Haas 2024-06-09 15:13:01 +02:00
parent 7ee64631f6
commit ae7bff55df
1 changed files with 16 additions and 19 deletions
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35
libavcodec/dovi_rpudec.c
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@ -308,7 +308,6 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
{
AVDOVIRpuDataHeader *hdr = &s->header;
GetBitContext *gb = &(GetBitContext){0};
DOVIVdr *vdr;
int ret;
uint8_t rpu_type;
@ -466,9 +465,9 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
prev_vdr_rpu_id);
goto fail;
}
vdr = s->vdr[prev_vdr_rpu_id];
s->mapping = &vdr->mapping;
s->mapping = &s->vdr[prev_vdr_rpu_id]->mapping;
} else {
AVDOVIDataMapping *mapping;
int vdr_rpu_id = get_ue_golomb_31(gb);
VALIDATE(vdr_rpu_id, 0, DOVI_MAX_DM_ID);
if (!s->vdr[vdr_rpu_id]) {
@ -477,15 +476,13 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
return AVERROR(ENOMEM);
}
vdr = s->vdr[vdr_rpu_id];
s->mapping = &vdr->mapping;
vdr->mapping.vdr_rpu_id = vdr_rpu_id;
vdr->mapping.mapping_color_space = get_ue_golomb_31(gb);
vdr->mapping.mapping_chroma_format_idc = get_ue_golomb_31(gb);
s->mapping = mapping = &s->vdr[vdr_rpu_id]->mapping;
mapping->vdr_rpu_id = vdr_rpu_id;
mapping->mapping_color_space = get_ue_golomb_31(gb);
mapping->mapping_chroma_format_idc = get_ue_golomb_31(gb);
for (int c = 0; c < 3; c++) {
AVDOVIReshapingCurve *curve = &vdr->mapping.curves[c];
AVDOVIReshapingCurve *curve = &mapping->curves[c];
int num_pivots_minus_2 = get_ue_golomb_31(gb);
int pivot = 0;
@ -499,28 +496,28 @@ 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);
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);
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.
*/
VALIDATE(vdr->mapping.nlq_method_idc, 0, AV_DOVI_NLQ_LINEAR_DZ);
VALIDATE(mapping->nlq_method_idc, 0, AV_DOVI_NLQ_LINEAR_DZ);
} else {
vdr->mapping.nlq_method_idc = AV_DOVI_NLQ_NONE;
mapping->nlq_method_idc = AV_DOVI_NLQ_NONE;
}
vdr->mapping.num_x_partitions = get_ue_golomb_long(gb) + 1;
vdr->mapping.num_y_partitions = get_ue_golomb_long(gb) + 1;
mapping->num_x_partitions = get_ue_golomb_long(gb) + 1;
mapping->num_y_partitions = get_ue_golomb_long(gb) + 1;
/* End of rpu_data_header(), start of vdr_rpu_data_payload() */
for (int c = 0; c < 3; c++) {
AVDOVIReshapingCurve *curve = &vdr->mapping.curves[c];
AVDOVIReshapingCurve *curve = &mapping->curves[c];
for (int i = 0; i < curve->num_pivots - 1; i++) {
int mapping_idc = get_ue_golomb_31(gb);
VALIDATE(mapping_idc, 0, 1);
@ -561,10 +558,10 @@ int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
if (use_nlq) {
for (int c = 0; c < 3; c++) {
AVDOVINLQParams *nlq = &vdr->mapping.nlq[c];
AVDOVINLQParams *nlq = &mapping->nlq[c];
nlq->nlq_offset = get_bits(gb, hdr->el_bit_depth);
nlq->vdr_in_max = get_ue_coef(gb, hdr);
switch (vdr->mapping.nlq_method_idc) {
switch (mapping->nlq_method_idc) {
case AV_DOVI_NLQ_LINEAR_DZ:
nlq->linear_deadzone_slope = get_ue_coef(gb, hdr);
nlq->linear_deadzone_threshold = get_ue_coef(gb, hdr);