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FFmpeg/libavcodec/dovi_rpudec.c
Niklas Haas e42a0763b7 avcodec/dovi_rpudec: clarify semantics 
ff_dovi_rpu_parse() and ff_dovi_rpu_generate() are a bit inconsistent in
that they expect different levels of encapsulation, due to the nature of
how this is handled in the context of different APIs. Clarify the status
quo. (And fix an incorrect reference to the RPU payload bytes as 'RBSP')
2024-07-28 12:20:07 +02:00

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/*
* Dolby Vision RPU decoder
*
* Copyright (C) 2021 Jan Ekström
* Copyright (C) 2021-2024 Niklas Haas
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/mem.h"
#include "libavutil/crc.h"
#include "avcodec.h"
#include "dovi_rpu.h"
#include "golomb.h"
#include "get_bits.h"
#include "refstruct.h"
int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame)
{
AVFrameSideData *sd;
AVBufferRef *buf;
AVDOVIMetadata *dovi;
size_t dovi_size, ext_sz;
if (!s->mapping || !s->color)
return 0; /* incomplete dovi metadata */
dovi = av_dovi_metadata_alloc(&dovi_size);
if (!dovi)
return AVERROR(ENOMEM);
buf = av_buffer_create((uint8_t *) dovi, dovi_size, NULL, NULL, 0);
if (!buf) {
av_free(dovi);
return AVERROR(ENOMEM);
}
sd = av_frame_new_side_data_from_buf(frame, AV_FRAME_DATA_DOVI_METADATA, buf);
if (!sd) {
av_buffer_unref(&buf);
return AVERROR(ENOMEM);
}
/* 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, ext_mapping_idc_5_7);
COPY(AVDOVIDataMapping, av_dovi_get_mapping(dovi), s->mapping, nlq_pivots);
COPY(AVDOVIColorMetadata, av_dovi_get_color(dovi), s->color, source_diagonal);
ext_sz = FFMIN(sizeof(AVDOVIDmData), dovi->ext_block_size);
for (int i = 0; i < s->num_ext_blocks; i++)
memcpy(av_dovi_get_ext(dovi, i), &s->ext_blocks[i], ext_sz);
dovi->num_ext_blocks = s->num_ext_blocks;
return 0;
}
static inline uint64_t get_ue_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *hdr)
{
uint64_t ipart;
union { uint32_t u32; float f32; } fpart;
switch (hdr->coef_data_type) {
case RPU_COEFF_FIXED:
ipart = get_ue_golomb_long(gb);
fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom);
return (ipart << hdr->coef_log2_denom) | fpart.u32;
case RPU_COEFF_FLOAT:
fpart.u32 = get_bits_long(gb, 32);
return fpart.f32 * (1LL << hdr->coef_log2_denom);
}
return 0; /* unreachable */
}
static inline int64_t get_se_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *hdr)
{
int64_t ipart;
union { uint32_t u32; float f32; } fpart;
switch (hdr->coef_data_type) {
case RPU_COEFF_FIXED:
ipart = get_se_golomb_long(gb);
fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom);
return ipart * (1LL << hdr->coef_log2_denom) | fpart.u32;
case RPU_COEFF_FLOAT:
fpart.u32 = get_bits_long(gb, 32);
return fpart.f32 * (1LL << hdr->coef_log2_denom);
}
return 0; /* unreachable */
}
static inline unsigned get_variable_bits(GetBitContext *gb, int n)
{
unsigned int value = get_bits(gb, n);
int read_more = get_bits1(gb);
while (read_more) {
value = (value + 1) << n;
value |= get_bits(gb, n);
read_more = get_bits1(gb);
}
return value;
}
#define VALIDATE(VAR, MIN, MAX) \
do { \
if (VAR < MIN || VAR > MAX) { \
av_log(s->logctx, AV_LOG_ERROR, "RPU validation failed: " \
#MIN" <= "#VAR" = %d <= "#MAX"\n", (int) VAR); \
ff_dovi_ctx_unref(s); \
return AVERROR_INVALIDDATA; \
} \
} while (0)
static int parse_ext_v1(DOVIContext *s, GetBitContext *gb, AVDOVIDmData *dm)
{
switch (dm->level) {
case 1:
dm->l1.min_pq = get_bits(gb, 12);
dm->l1.max_pq = get_bits(gb, 12);
dm->l1.avg_pq = get_bits(gb, 12);
break;
case 2:
dm->l2.target_max_pq = get_bits(gb, 12);
dm->l2.trim_slope = get_bits(gb, 12);
dm->l2.trim_offset = get_bits(gb, 12);
dm->l2.trim_power = get_bits(gb, 12);
dm->l2.trim_chroma_weight = get_bits(gb, 12);
dm->l2.trim_saturation_gain = get_bits(gb, 12);
dm->l2.ms_weight = get_sbits(gb, 13);
VALIDATE(dm->l2.ms_weight, -1, 4095);
break;
case 4:
dm->l4.anchor_pq = get_bits(gb, 12);
dm->l4.anchor_power = get_bits(gb, 12);
break;
case 5:
dm->l5.left_offset = get_bits(gb, 13);
dm->l5.right_offset = get_bits(gb, 13);
dm->l5.top_offset = get_bits(gb, 13);
dm->l5.bottom_offset = get_bits(gb, 13);
break;
case 6:
dm->l6.max_luminance = get_bits(gb, 16);
dm->l6.min_luminance = get_bits(gb, 16);
dm->l6.max_cll = get_bits(gb, 16);
dm->l6.max_fall = get_bits(gb, 16);
break;
case 255:
dm->l255.dm_run_mode = get_bits(gb, 8);
dm->l255.dm_run_version = get_bits(gb, 8);
for (int i = 0; i < 4; i++)
dm->l255.dm_debug[i] = get_bits(gb, 8);
break;
default:
av_log(s->logctx, AV_LOG_WARNING,
"Unknown Dolby Vision DM v1 level: %u\n", dm->level);
}
return 0;
}
static AVCIExy get_cie_xy(GetBitContext *gb)
{
AVCIExy xy;
const int denom = 32767;
xy.x = av_make_q(get_sbits(gb, 16), denom);
xy.y = av_make_q(get_sbits(gb, 16), denom);
return xy;
}
static int parse_ext_v2(DOVIContext *s, GetBitContext *gb, AVDOVIDmData *dm,
int ext_block_length)
{
switch (dm->level) {
case 3:
dm->l3.min_pq_offset = get_bits(gb, 12);
dm->l3.max_pq_offset = get_bits(gb, 12);
dm->l3.avg_pq_offset = get_bits(gb, 12);
break;
case 8:
dm->l8.target_display_index = get_bits(gb, 8);
dm->l8.trim_slope = get_bits(gb, 12);
dm->l8.trim_offset = get_bits(gb, 12);
dm->l8.trim_power = get_bits(gb, 12);
dm->l8.trim_chroma_weight = get_bits(gb, 12);
dm->l8.trim_saturation_gain = get_bits(gb, 12);
dm->l8.ms_weight = get_bits(gb, 12);
if (ext_block_length < 12)
break;
dm->l8.target_mid_contrast = get_bits(gb, 12);
if (ext_block_length < 13)
break;
dm->l8.clip_trim = get_bits(gb, 12);
if (ext_block_length < 19)
break;
for (int i = 0; i < 6; i++)
dm->l8.saturation_vector_field[i] = get_bits(gb, 8);
if (ext_block_length < 25)
break;
for (int i = 0; i < 6; i++)
dm->l8.hue_vector_field[i] = get_bits(gb, 8);
break;
case 9:
dm->l9.source_primary_index = get_bits(gb, 8);
if (ext_block_length < 17)
break;
dm->l9.source_display_primaries.prim.r = get_cie_xy(gb);
dm->l9.source_display_primaries.prim.g = get_cie_xy(gb);
dm->l9.source_display_primaries.prim.b = get_cie_xy(gb);
dm->l9.source_display_primaries.wp = get_cie_xy(gb);
break;
case 10:
dm->l10.target_display_index = get_bits(gb, 8);
dm->l10.target_max_pq = get_bits(gb, 12);
dm->l10.target_min_pq = get_bits(gb, 12);
dm->l10.target_primary_index = get_bits(gb, 8);
if (ext_block_length < 21)
break;
dm->l10.target_display_primaries.prim.r = get_cie_xy(gb);
dm->l10.target_display_primaries.prim.g = get_cie_xy(gb);
dm->l10.target_display_primaries.prim.b = get_cie_xy(gb);
dm->l10.target_display_primaries.wp = get_cie_xy(gb);
break;
case 11:
dm->l11.content_type = get_bits(gb, 8);
dm->l11.whitepoint = get_bits(gb, 4);
dm->l11.reference_mode_flag = get_bits1(gb);
skip_bits(gb, 3); /* reserved */
dm->l11.sharpness = get_bits(gb, 2);
dm->l11.noise_reduction = get_bits(gb, 2);
dm->l11.mpeg_noise_reduction = get_bits(gb, 2);
dm->l11.frame_rate_conversion = get_bits(gb, 2);
dm->l11.brightness = get_bits(gb, 2);
dm->l11.color = get_bits(gb, 2);
break;
case 254:
dm->l254.dm_mode = get_bits(gb, 8);
dm->l254.dm_version_index = get_bits(gb, 8);
break;
default:
av_log(s->logctx, AV_LOG_WARNING,
"Unknown Dolby Vision DM v2 level: %u\n", dm->level);
}
return 0;
}
static int parse_ext_blocks(DOVIContext *s, GetBitContext *gb, int ver)
{
int num_ext_blocks, ext_block_length, start_pos, parsed_bits, ret;
num_ext_blocks = get_ue_golomb_31(gb);
align_get_bits(gb);
if (s->num_ext_blocks + num_ext_blocks > AV_DOVI_MAX_EXT_BLOCKS)
return AVERROR_INVALIDDATA;
if (!s->ext_blocks) {
s->ext_blocks = ff_refstruct_allocz(sizeof(AVDOVIDmData) * AV_DOVI_MAX_EXT_BLOCKS);
if (!s->ext_blocks)
return AVERROR(ENOMEM);
}
while (num_ext_blocks--) {
AVDOVIDmData *dm = &s->ext_blocks[s->num_ext_blocks++];
ext_block_length = get_ue_golomb_31(gb);
dm->level = get_bits(gb, 8);
start_pos = get_bits_count(gb);
switch (ver) {
case 1: ret = parse_ext_v1(s, gb, dm); break;
case 2: ret = parse_ext_v2(s, gb, dm, ext_block_length); break;
default: return AVERROR_BUG;
}
if (ret < 0)
return ret;
parsed_bits = get_bits_count(gb) - start_pos;
if (parsed_bits > ext_block_length * 8)
return AVERROR_INVALIDDATA;
skip_bits(gb, ext_block_length * 8 - parsed_bits);
}
return 0;
}
int ff_dovi_rpu_parse(DOVIContext *s, const uint8_t *rpu, size_t rpu_size,
int err_recognition)
{
AVDOVIRpuDataHeader *hdr = &s->header;
GetBitContext *gb = &(GetBitContext){0};
int ret;
uint8_t rpu_type;
uint8_t vdr_seq_info_present;
uint8_t vdr_dm_metadata_present;
uint8_t use_prev_vdr_rpu;
uint8_t use_nlq;
uint8_t profile;
if (rpu_size < 5)
return AVERROR_INVALIDDATA;
/* Container */
if (s->cfg.dv_profile == 10 /* dav1.10 */) {
/* DV inside AV1 re-uses an EMDF container skeleton, but with fixed
* values - so we can effectively treat this as a magic byte sequence.
*
* The exact fields are, as follows:
* emdf_version : f(2) = 0
* key_id : f(3) = 6
* emdf_payload_id : f(5) = 31
* emdf_payload_id_ext : var(5) = 225
* smploffste : f(1) = 0
* duratione : f(1) = 0
* groupide : f(1) = 0
* codecdatae : f(1) = 0
* discard_unknown_payload : f(1) = 1
*/
const unsigned header_magic = 0x01be6841u;
unsigned emdf_header, emdf_payload_size, emdf_protection;
if ((ret = init_get_bits8(gb, rpu, rpu_size)) < 0)
return ret;
emdf_header = get_bits_long(gb, 27);
VALIDATE(emdf_header, header_magic, header_magic);
emdf_payload_size = get_variable_bits(gb, 8);
VALIDATE(emdf_payload_size, 6, 512);
if (emdf_payload_size * 8 > get_bits_left(gb))
return AVERROR_INVALIDDATA;
/* The payload is not byte-aligned (off by *one* bit, curse Dolby),
* so copy into a fresh buffer to preserve byte alignment of the
* RPU struct */
av_fast_padded_malloc(&s->rpu_buf, &s->rpu_buf_sz, emdf_payload_size);
if (!s->rpu_buf)
return AVERROR(ENOMEM);
for (int i = 0; i < emdf_payload_size; i++)
s->rpu_buf[i] = get_bits(gb, 8);
rpu = s->rpu_buf;
rpu_size = emdf_payload_size;
/* Validate EMDF footer */
emdf_protection = get_bits(gb, 5 + 12);
VALIDATE(emdf_protection, 0x400, 0x400);
} else {
/* NAL unit with prefix and trailing zeroes */
VALIDATE(rpu[0], 25, 25); /* NAL prefix */
rpu++;
rpu_size--;
/* Strip trailing padding bytes */
while (rpu_size && rpu[rpu_size - 1] == 0)
rpu_size--;
}
if (!rpu_size || rpu[rpu_size - 1] != 0x80)
return AVERROR_INVALIDDATA;
if (err_recognition & AV_EF_CRCCHECK) {
uint32_t crc = av_bswap32(av_crc(av_crc_get_table(AV_CRC_32_IEEE),
-1, rpu, rpu_size - 1)); /* exclude 0x80 */
if (crc) {
av_log(s->logctx, AV_LOG_ERROR, "RPU CRC mismatch: %X\n", crc);
if (err_recognition & AV_EF_EXPLODE)
return AVERROR_INVALIDDATA;
}
}
if ((ret = init_get_bits8(gb, rpu, rpu_size)) < 0)
return ret;
/* RPU header */
rpu_type = get_bits(gb, 6);
if (rpu_type != 2) {
av_log(s->logctx, AV_LOG_WARNING, "Unrecognized RPU type "
"%"PRIu8", ignoring\n", rpu_type);
return 0;
}
hdr->rpu_type = rpu_type;
hdr->rpu_format = get_bits(gb, 11);
/* Values specific to RPU type 2 */
hdr->vdr_rpu_profile = get_bits(gb, 4);
hdr->vdr_rpu_level = get_bits(gb, 4);
vdr_seq_info_present = get_bits1(gb);
if (vdr_seq_info_present) {
hdr->chroma_resampling_explicit_filter_flag = get_bits1(gb);
hdr->coef_data_type = get_bits(gb, 2);
VALIDATE(hdr->coef_data_type, RPU_COEFF_FIXED, RPU_COEFF_FLOAT);
switch (hdr->coef_data_type) {
case RPU_COEFF_FIXED:
hdr->coef_log2_denom = get_ue_golomb(gb);
VALIDATE(hdr->coef_log2_denom, 13, 32);
break;
case RPU_COEFF_FLOAT:
hdr->coef_log2_denom = 32; /* arbitrary, choose maximum precision */
break;
}
hdr->vdr_rpu_normalized_idc = get_bits(gb, 2);
hdr->bl_video_full_range_flag = get_bits1(gb);
if ((hdr->rpu_format & 0x700) == 0) {
int bl_bit_depth_minus8 = get_ue_golomb_31(gb);
int el_bit_depth_minus8 = get_ue_golomb_long(gb);
int vdr_bit_depth_minus8 = get_ue_golomb_31(gb);
int reserved_zero_3bits;
/* ext_mapping_idc is in the upper 8 bits of el_bit_depth_minus8 */
int ext_mapping_idc = el_bit_depth_minus8 >> 8;
el_bit_depth_minus8 = el_bit_depth_minus8 & 0xFF;
VALIDATE(bl_bit_depth_minus8, 0, 8);
VALIDATE(el_bit_depth_minus8, 0, 8);
VALIDATE(ext_mapping_idc, 0, 0xFF);
VALIDATE(vdr_bit_depth_minus8, 0, 8);
hdr->bl_bit_depth = bl_bit_depth_minus8 + 8;
hdr->el_bit_depth = el_bit_depth_minus8 + 8;
hdr->ext_mapping_idc_0_4 = ext_mapping_idc & 0x1f; /* 5 bits */
hdr->ext_mapping_idc_5_7 = ext_mapping_idc >> 5;
hdr->vdr_bit_depth = vdr_bit_depth_minus8 + 8;
hdr->spatial_resampling_filter_flag = get_bits1(gb);
reserved_zero_3bits = get_bits(gb, 3);
VALIDATE(reserved_zero_3bits, 0, 0);
hdr->el_spatial_resampling_filter_flag = get_bits1(gb);
hdr->disable_residual_flag = get_bits1(gb);
}
} else {
/* lack of documentation/samples */
avpriv_request_sample(s->logctx, "Missing RPU VDR sequence info\n");
ff_dovi_ctx_unref(s);
return AVERROR_PATCHWELCOME;
}
vdr_dm_metadata_present = get_bits1(gb);
use_prev_vdr_rpu = get_bits1(gb);
use_nlq = (hdr->rpu_format & 0x700) == 0 && !hdr->disable_residual_flag;
profile = s->cfg.dv_profile ? s->cfg.dv_profile : ff_dovi_guess_profile_hevc(hdr);
if (profile == 5 && use_nlq) {
av_log(s->logctx, AV_LOG_ERROR, "Profile 5 RPUs should not use NLQ\n");
ff_dovi_ctx_unref(s);
return AVERROR_INVALIDDATA;
}
if (use_prev_vdr_rpu) {
int prev_vdr_rpu_id = get_ue_golomb_31(gb);
VALIDATE(prev_vdr_rpu_id, 0, DOVI_MAX_DM_ID);
if (!s->vdr[prev_vdr_rpu_id])
prev_vdr_rpu_id = 0;
if (!s->vdr[prev_vdr_rpu_id]) {
/* FIXME: Technically, the spec says that in this case we should
* synthesize "neutral" vdr metadata, but easier to just error
* out as this corner case is not hit in practice */
av_log(s->logctx, AV_LOG_ERROR, "Unknown previous RPU ID: %u\n",
prev_vdr_rpu_id);
ff_dovi_ctx_unref(s);
return AVERROR_INVALIDDATA;
}
s->mapping = s->vdr[prev_vdr_rpu_id];
} 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]) {
s->vdr[vdr_rpu_id] = ff_refstruct_allocz(sizeof(AVDOVIDataMapping));
if (!s->vdr[vdr_rpu_id]) {
ff_dovi_ctx_unref(s);
return AVERROR(ENOMEM);
}
}
s->mapping = mapping = s->vdr[vdr_rpu_id];
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 = &mapping->curves[c];
int num_pivots_minus_2 = get_ue_golomb_31(gb);
int pivot = 0;
VALIDATE(num_pivots_minus_2, 0, AV_DOVI_MAX_PIECES - 1);
curve->num_pivots = num_pivots_minus_2 + 2;
for (int i = 0; i < curve->num_pivots; i++) {
pivot += get_bits(gb, hdr->bl_bit_depth);
curve->pivots[i] = av_clip_uint16(pivot);
}
}
if (use_nlq) {
int nlq_pivot = 0;
mapping->nlq_method_idc = get_bits(gb, 3);
for (int i = 0; i < 2; i++) {
nlq_pivot += get_bits(gb, hdr->bl_bit_depth);
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(mapping->nlq_method_idc, 0, AV_DOVI_NLQ_LINEAR_DZ);
} else {
mapping->nlq_method_idc = AV_DOVI_NLQ_NONE;
}
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 = &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);
curve->mapping_idc[i] = mapping_idc;
switch (mapping_idc) {
case AV_DOVI_MAPPING_POLYNOMIAL: {
int poly_order_minus1 = get_ue_golomb_31(gb);
VALIDATE(poly_order_minus1, 0, 1);
curve->poly_order[i] = poly_order_minus1 + 1;
if (poly_order_minus1 == 0) {
int linear_interp_flag = get_bits1(gb);
if (linear_interp_flag) {
/* lack of documentation/samples */
avpriv_request_sample(s->logctx, "Dolby Vision "
"linear interpolation");
ff_dovi_ctx_unref(s);
return AVERROR_PATCHWELCOME;
}
}
for (int k = 0; k <= curve->poly_order[i]; k++)
curve->poly_coef[i][k] = get_se_coef(gb, hdr);
break;
}
case AV_DOVI_MAPPING_MMR: {
int mmr_order_minus1 = get_bits(gb, 2);
VALIDATE(mmr_order_minus1, 0, 2);
curve->mmr_order[i] = mmr_order_minus1 + 1;
curve->mmr_constant[i] = get_se_coef(gb, hdr);
for (int j = 0; j < curve->mmr_order[i]; j++) {
for (int k = 0; k < 7; k++)
curve->mmr_coef[i][j][k] = get_se_coef(gb, hdr);
}
break;
}
}
}
}
if (use_nlq) {
for (int c = 0; c < 3; 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 (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);
break;
}
}
}
}
if (vdr_dm_metadata_present) {
AVDOVIColorMetadata *color;
int affected_dm_id = get_ue_golomb_31(gb);
int current_dm_id = get_ue_golomb_31(gb);
VALIDATE(affected_dm_id, 0, DOVI_MAX_DM_ID);
VALIDATE(current_dm_id, 0, DOVI_MAX_DM_ID);
if (affected_dm_id != current_dm_id) {
/* The spec does not explain these fields at all, and there is
* a lack of samples to understand how they're supposed to work,
* so just assert them being equal for now */
avpriv_request_sample(s->logctx, "affected/current_dm_metadata_id "
"mismatch? %u != %u\n", affected_dm_id, current_dm_id);
ff_dovi_ctx_unref(s);
return AVERROR_PATCHWELCOME;
}
if (!s->dm) {
s->dm = ff_refstruct_allocz(sizeof(AVDOVIColorMetadata));
if (!s->dm) {
ff_dovi_ctx_unref(s);
return AVERROR(ENOMEM);
}
}
s->color = color = s->dm;
color->dm_metadata_id = affected_dm_id;
color->scene_refresh_flag = get_ue_golomb_31(gb);
for (int i = 0; i < 9; i++)
color->ycc_to_rgb_matrix[i] = av_make_q(get_sbits(gb, 16), 1 << 13);
for (int i = 0; i < 3; i++) {
int denom = profile == 4 ? (1 << 30) : (1 << 28);
unsigned offset = get_bits_long(gb, 32);
if (offset > INT_MAX) {
/* Ensure the result fits inside AVRational */
offset >>= 1;
denom >>= 1;
}
color->ycc_to_rgb_offset[i] = av_make_q(offset, denom);
}
for (int i = 0; i < 9; i++)
color->rgb_to_lms_matrix[i] = av_make_q(get_sbits(gb, 16), 1 << 14);
color->signal_eotf = get_bits(gb, 16);
color->signal_eotf_param0 = get_bits(gb, 16);
color->signal_eotf_param1 = get_bits(gb, 16);
color->signal_eotf_param2 = get_bits_long(gb, 32);
color->signal_bit_depth = get_bits(gb, 5);
VALIDATE(color->signal_bit_depth, 8, 16);
color->signal_color_space = get_bits(gb, 2);
color->signal_chroma_format = get_bits(gb, 2);
color->signal_full_range_flag = get_bits(gb, 2);
color->source_min_pq = get_bits(gb, 12);
color->source_max_pq = get_bits(gb, 12);
color->source_diagonal = get_bits(gb, 10);
/* Parse extension blocks */
s->num_ext_blocks = 0;
if ((ret = parse_ext_blocks(s, gb, 1)) < 0) {
ff_dovi_ctx_unref(s);
return ret;
}
if (get_bits_left(gb) > 48 /* padding + CRC32 + terminator */) {
if ((ret = parse_ext_blocks(s, gb, 2)) < 0) {
ff_dovi_ctx_unref(s);
return ret;
}
}
} else {
s->color = &ff_dovi_color_default;
s->num_ext_blocks = 0;
}
return 0;
}
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