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FFmpeg/libavcodec/dovi_rpu.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* Dolby Vision RPU decoder
*
* Copyright (C) 2021 Jan Ekström
* Copyright (C) 2021 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/buffer.h"
#include "libavutil/mem.h"
#include "dovi_rpu.h"
#include "golomb.h"
#include "get_bits.h"
#include "refstruct.h"
enum {
RPU_COEFF_FIXED = 0,
RPU_COEFF_FLOAT = 1,
};
/**
* Private contents of vdr.
*/
typedef struct DOVIVdr {
AVDOVIDataMapping mapping;
AVDOVIColorMetadata color;
} DOVIVdr;
void ff_dovi_ctx_unref(DOVIContext *s)
{
for (int i = 0; i < FF_ARRAY_ELEMS(s->vdr); i++)
ff_refstruct_unref(&s->vdr[i]);
*s = (DOVIContext) {
.logctx = s->logctx,
};
}
void ff_dovi_ctx_flush(DOVIContext *s)
{
for (int i = 0; i < FF_ARRAY_ELEMS(s->vdr); i++)
ff_refstruct_unref(&s->vdr[i]);
*s = (DOVIContext) {
.logctx = s->logctx,
.dv_profile = s->dv_profile,
};
}
void ff_dovi_ctx_replace(DOVIContext *s, const DOVIContext *s0)
{
s->logctx = s0->logctx;
s->mapping = s0->mapping;
s->color = s0->color;
s->dv_profile = s0->dv_profile;
for (int i = 0; i <= DOVI_MAX_DM_ID; i++)
ff_refstruct_replace(&s->vdr[i], s0->vdr[i]);
}
void ff_dovi_update_cfg(DOVIContext *s, const AVDOVIDecoderConfigurationRecord *cfg)
{
if (!cfg)
return;
s->dv_profile = cfg->dv_profile;
}
int ff_dovi_attach_side_data(DOVIContext *s, AVFrame *frame)
{
AVFrameSideData *sd;
AVBufferRef *buf;
AVDOVIMetadata *dovi;
size_t dovi_size;
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, disable_residual_flag);
COPY(AVDOVIDataMapping, av_dovi_get_mapping(dovi), s->mapping, nlq[2].linear_deadzone_threshold);
COPY(AVDOVIColorMetadata, av_dovi_get_color(dovi), s->color, source_diagonal);
return 0;
}
static int guess_profile(const AVDOVIRpuDataHeader *hdr)
{
switch (hdr->vdr_rpu_profile) {
case 0:
if (hdr->bl_video_full_range_flag)
return 5;
break;
case 1:
if (hdr->el_spatial_resampling_filter_flag && !hdr->disable_residual_flag) {
if (hdr->vdr_bit_depth == 12) {
return 7;
} else {
return 4;
}
} else {
return 8;
}
}
return 0; /* unknown */
}
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); \
goto fail; \
} \
} while (0)
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 nal_prefix;
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 ((ret = init_get_bits8(gb, rpu, rpu_size)) < 0)
return ret;
/* Container header */
if (s->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 header, emdf_payload_size;
header = get_bits_long(gb, 27);
VALIDATE(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;
} else {
nal_prefix = get_bits(gb, 8);
VALIDATE(nal_prefix, 25, 25);
}
/* 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_31(gb);
int vdr_bit_depth_minus8 = get_ue_golomb_31(gb);
VALIDATE(bl_bit_depth_minus8, 0, 8);
VALIDATE(el_bit_depth_minus8, 0, 8);
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->vdr_bit_depth = vdr_bit_depth_minus8 + 8;
hdr->spatial_resampling_filter_flag = get_bits1(gb);
skip_bits(gb, 3); /* reserved_zero_3bits */
hdr->el_spatial_resampling_filter_flag = get_bits1(gb);
hdr->disable_residual_flag = get_bits1(gb);
}
}
if (!hdr->bl_bit_depth) {
av_log(s->logctx, AV_LOG_ERROR, "Missing RPU VDR sequence info?\n");
goto fail;
}
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->dv_profile ? s->dv_profile : guess_profile(hdr);
if (profile == 5 && use_nlq) {
av_log(s->logctx, AV_LOG_ERROR, "Profile 5 RPUs should not use NLQ\n");
goto fail;
}
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]) {
av_log(s->logctx, AV_LOG_ERROR, "Unknown previous RPU ID: %u\n",
prev_vdr_rpu_id);
goto fail;
}
vdr = s->vdr[prev_vdr_rpu_id];
s->mapping = &vdr->mapping;
} else {
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(DOVIVdr));
if (!s->vdr[vdr_rpu_id])
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);
for (int c = 0; c < 3; c++) {
AVDOVIReshapingCurve *curve = &vdr->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) {
vdr->mapping.nlq_method_idc = get_bits(gb, 3);
/**
* 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);
} else {
vdr->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;
/* End of rpu_data_header(), start of vdr_rpu_data_payload() */
for (int c = 0; c < 3; c++) {
AVDOVIReshapingCurve *curve = &vdr->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 = &vdr->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) {
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 (!s->vdr[affected_dm_id]) {
s->vdr[affected_dm_id] = ff_refstruct_allocz(sizeof(DOVIVdr));
if (!s->vdr[affected_dm_id])
return AVERROR(ENOMEM);
}
if (!s->vdr[current_dm_id]) {
av_log(s->logctx, AV_LOG_ERROR, "Unknown previous RPU DM ID: %u\n",
current_dm_id);
goto fail;
}
/* Update current pointer based on current_dm_id */
vdr = s->vdr[current_dm_id];
s->color = &vdr->color;
/* Update values of affected_dm_id */
vdr = s->vdr[affected_dm_id];
color = &vdr->color;
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);
}
/* FIXME: verify CRC32, requires implementation of AV_CRC_32_MPEG_2 */
return 0;
fail:
ff_dovi_ctx_unref(s); /* don't leak potentially invalid state */
return AVERROR(EINVAL);
}
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