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FFmpeg/libavformat/evc.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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/*
* EVC helper functions for muxers
* Copyright (c) 2022 Dawid Kozinski <d.kozinski@samsung.com>
*
* 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 "libavcodec/get_bits.h"
#include "libavcodec/golomb.h"
#include "libavcodec/evc.h"
#include "avio.h"
#include "evc.h"
// @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.1
enum {
SPS_INDEX,
PPS_INDEX,
APS_INDEX,
SEI_INDEX,
NB_ARRAYS
};
// @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.3
typedef struct EVCNALUnitArray {
uint8_t array_completeness; // when equal to 1 indicates that all NAL units of the given type are in the following array
uint8_t NAL_unit_type; // indicates the type of the NAL units in the following array
uint16_t numNalus; // indicates the number of NAL units of the indicated type
uint16_t *nalUnitLength; // indicates the length in bytes of the NAL unit
uint8_t **nalUnit; // contains an SPS, PPS, APS or a SEI NAL unit, as specified in ISO/IEC 23094-1
} EVCNALUnitArray;
/**
* @brief Specifies the decoder configuration information for ISO/IEC 23094-1 video content.
* @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.2
* Carriage of network abstraction layer (NAL) unit structured video in the ISO base media file format
*/
typedef struct EVCDecoderConfigurationRecord {
uint8_t configurationVersion; // 8 bits
uint8_t profile_idc; // 8 bits
uint8_t level_idc; // 8 bits
uint32_t toolset_idc_h; // 32 bits
uint32_t toolset_idc_l; // 32 bits
uint8_t chroma_format_idc; // 2 bits
uint8_t bit_depth_luma_minus8; // 3 bits
uint8_t bit_depth_chroma_minus8; // 3 bits
uint16_t pic_width_in_luma_samples; // 16 bits
uint16_t pic_height_in_luma_samples; // 16 bits
uint8_t reserved; // 6 bits '000000'b
uint8_t lengthSizeMinusOne; // 2 bits
uint8_t num_of_arrays; // 8 bits
EVCNALUnitArray arrays[NB_ARRAYS];
} EVCDecoderConfigurationRecord;
typedef struct NALU {
int offset;
uint32_t size;
} NALU;
typedef struct NALUList {
NALU *nalus;
unsigned nalus_array_size;
unsigned nb_nalus; ///< valid entries in nalus
} NALUList;
// @see ISO_IEC_23094-1 (7.3.2.1 SPS RBSP syntax)
static int evcc_parse_sps(const uint8_t *bs, int bs_size, EVCDecoderConfigurationRecord *evcc)
{
GetBitContext gb;
unsigned sps_seq_parameter_set_id;
int ret;
bs += EVC_NALU_HEADER_SIZE;
bs_size -= EVC_NALU_HEADER_SIZE;
ret = init_get_bits8(&gb, bs, bs_size);
if (ret < 0)
return ret;
sps_seq_parameter_set_id = get_ue_golomb_long(&gb);
if (sps_seq_parameter_set_id >= EVC_MAX_SPS_COUNT)
return AVERROR_INVALIDDATA;
// the Baseline profile is indicated by profile_idc eqal to 0
// the Main profile is indicated by profile_idc eqal to 1
evcc->profile_idc = get_bits(&gb, 8);
evcc->level_idc = get_bits(&gb, 8);
evcc->toolset_idc_h = get_bits_long(&gb, 32);
evcc->toolset_idc_l = get_bits_long(&gb, 32);
// 0 - monochrome
// 1 - 4:2:0
// 2 - 4:2:2
// 3 - 4:4:4
evcc->chroma_format_idc = get_ue_golomb_long(&gb);
if (evcc->chroma_format_idc > 3)
return AVERROR_INVALIDDATA;
evcc->pic_width_in_luma_samples = get_ue_golomb_long(&gb);
evcc->pic_height_in_luma_samples = get_ue_golomb_long(&gb);
evcc->bit_depth_luma_minus8 = get_ue_golomb_long(&gb);
evcc->bit_depth_chroma_minus8 = get_ue_golomb_long(&gb);
// EVCDecoderConfigurationRecord can't store values > 7. Limit it to bit depth 14.
if (evcc->bit_depth_luma_minus8 > 6 || evcc->bit_depth_chroma_minus8 > 6)
return AVERROR_INVALIDDATA;
return 0;
}
// @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.3
static int evcc_array_add_nal_unit(const uint8_t *nal_buf, uint32_t nal_size,
uint8_t nal_type, int ps_array_completeness,
EVCNALUnitArray *array)
{
int ret;
uint16_t numNalus = array->numNalus;
ret = av_reallocp_array(&array->nalUnit, numNalus + 1, sizeof(uint8_t *));
if (ret < 0)
return ret;
ret = av_reallocp_array(&array->nalUnitLength, numNalus + 1, sizeof(uint16_t));
if (ret < 0)
return ret;
array->nalUnit [numNalus] = (uint8_t *)nal_buf;
array->nalUnitLength[numNalus] = nal_size;
array->NAL_unit_type = nal_type;
array->numNalus++;
/*
* When the sample entry name is 'evc1', the default and mandatory value of
* array_completeness is 1 for arrays of all types of parameter sets, and 0
* for all other arrays.
*/
if (nal_type == EVC_SPS_NUT || nal_type == EVC_PPS_NUT || nal_type == EVC_APS_NUT)
array->array_completeness = ps_array_completeness;
return 0;
}
static void evcc_init(EVCDecoderConfigurationRecord *evcc)
{
memset(evcc, 0, sizeof(EVCDecoderConfigurationRecord));
evcc->configurationVersion = 1;
evcc->lengthSizeMinusOne = 3; // 4 bytes
}
static void evcc_close(EVCDecoderConfigurationRecord *evcc)
{
for (unsigned i = 0; i < FF_ARRAY_ELEMS(evcc->arrays); i++) {
EVCNALUnitArray *const array = &evcc->arrays[i];
array->numNalus = 0;
av_freep(&array->nalUnit);
av_freep(&array->nalUnitLength);
}
}
static int evcc_write(AVIOContext *pb, EVCDecoderConfigurationRecord *evcc)
{
uint16_t sps_count;
av_log(NULL, AV_LOG_TRACE, "configurationVersion: %"PRIu8"\n",
evcc->configurationVersion);
av_log(NULL, AV_LOG_TRACE, "profile_idc: %"PRIu8"\n",
evcc->profile_idc);
av_log(NULL, AV_LOG_TRACE, "level_idc: %"PRIu8"\n",
evcc->level_idc);
av_log(NULL, AV_LOG_TRACE, "toolset_idc_h: %"PRIu32"\n",
evcc->toolset_idc_h);
av_log(NULL, AV_LOG_TRACE, "toolset_idc_l: %"PRIu32"\n",
evcc->toolset_idc_l);
av_log(NULL, AV_LOG_TRACE, "chroma_format_idc: %"PRIu8"\n",
evcc->chroma_format_idc);
av_log(NULL, AV_LOG_TRACE, "bit_depth_luma_minus8: %"PRIu8"\n",
evcc->bit_depth_luma_minus8);
av_log(NULL, AV_LOG_TRACE, "bit_depth_chroma_minus8: %"PRIu8"\n",
evcc->bit_depth_chroma_minus8);
av_log(NULL, AV_LOG_TRACE, "pic_width_in_luma_samples: %"PRIu16"\n",
evcc->pic_width_in_luma_samples);
av_log(NULL, AV_LOG_TRACE, "pic_height_in_luma_samples: %"PRIu16"\n",
evcc->pic_height_in_luma_samples);
av_log(NULL, AV_LOG_TRACE, "lengthSizeMinusOne: %"PRIu8"\n",
evcc->lengthSizeMinusOne);
av_log(NULL, AV_LOG_TRACE, "num_of_arrays: %"PRIu8"\n",
evcc->num_of_arrays);
for (unsigned i = 0; i < FF_ARRAY_ELEMS(evcc->arrays); i++) {
const EVCNALUnitArray *const array = &evcc->arrays[i];
if(array->numNalus == 0)
continue;
av_log(NULL, AV_LOG_TRACE, "array_completeness[%"PRIu8"]: %"PRIu8"\n",
i, array->array_completeness);
av_log(NULL, AV_LOG_TRACE, "NAL_unit_type[%"PRIu8"]: %"PRIu8"\n",
i, array->NAL_unit_type);
av_log(NULL, AV_LOG_TRACE, "numNalus[%"PRIu8"]: %"PRIu16"\n",
i, array->numNalus);
for ( unsigned j = 0; j < array->numNalus; j++)
av_log(NULL, AV_LOG_TRACE,
"nalUnitLength[%"PRIu8"][%"PRIu16"]: %"PRIu16"\n",
i, j, array->nalUnitLength[j]);
}
/*
* We need at least one SPS.
*/
sps_count = evcc->arrays[SPS_INDEX].numNalus;
if (!sps_count || sps_count > EVC_MAX_SPS_COUNT)
return AVERROR_INVALIDDATA;
/* unsigned int(8) configurationVersion = 1; */
avio_w8(pb, evcc->configurationVersion);
/* unsigned int(8) profile_idc */
avio_w8(pb, evcc->profile_idc);
/* unsigned int(8) profile_idc */
avio_w8(pb, evcc->level_idc);
/* unsigned int(32) toolset_idc_h */
avio_wb32(pb, evcc->toolset_idc_h);
/* unsigned int(32) toolset_idc_l */
avio_wb32(pb, evcc->toolset_idc_l);
/*
* unsigned int(2) chroma_format_idc;
* unsigned int(3) bit_depth_luma_minus8;
* unsigned int(3) bit_depth_chroma_minus8;
*/
avio_w8(pb, evcc->chroma_format_idc << 6 |
evcc->bit_depth_luma_minus8 << 3 |
evcc->bit_depth_chroma_minus8);
/* unsigned int(16) pic_width_in_luma_samples; */
avio_wb16(pb, evcc->pic_width_in_luma_samples);
/* unsigned int(16) pic_width_in_luma_samples; */
avio_wb16(pb, evcc->pic_height_in_luma_samples);
/*
* bit(6) reserved = '111111'b;
* unsigned int(2) chromaFormat;
*/
avio_w8(pb, evcc->lengthSizeMinusOne | 0xfc);
/* unsigned int(8) numOfArrays; */
avio_w8(pb, evcc->num_of_arrays);
for (unsigned i = 0; i < FF_ARRAY_ELEMS(evcc->arrays); i++) {
const EVCNALUnitArray *const array = &evcc->arrays[i];
if (!array->numNalus)
continue;
/*
* bit(1) array_completeness;
* unsigned int(1) reserved = 0;
* unsigned int(6) NAL_unit_type;
*/
avio_w8(pb, array->array_completeness << 7 |
array->NAL_unit_type & 0x3f);
/* unsigned int(16) numNalus; */
avio_wb16(pb, array->numNalus);
for (unsigned j = 0; j < array->numNalus; j++) {
/* unsigned int(16) nalUnitLength; */
avio_wb16(pb, array->nalUnitLength[j]);
/* bit(8*nalUnitLength) nalUnit; */
avio_write(pb, array->nalUnit[j],
array->nalUnitLength[j]);
}
}
return 0;
}
int ff_isom_write_evcc(AVIOContext *pb, const uint8_t *data,
int size, int ps_array_completeness)
{
EVCDecoderConfigurationRecord evcc;
int nalu_type;
size_t nalu_size;
int bytes_to_read = size;
unsigned array_index;
int ret = 0;
if (size < 8) {
/* We can't write a valid evcC from the provided data */
return AVERROR_INVALIDDATA;
} else if (*data == 1) {
/* Data is already evcC-formatted */
avio_write(pb, data, size);
return 0;
}
evcc_init(&evcc);
while (bytes_to_read > EVC_NALU_LENGTH_PREFIX_SIZE) {
nalu_size = evc_read_nal_unit_length(data, EVC_NALU_LENGTH_PREFIX_SIZE);
if (nalu_size == 0) break;
data += EVC_NALU_LENGTH_PREFIX_SIZE;
bytes_to_read -= EVC_NALU_LENGTH_PREFIX_SIZE;
if (bytes_to_read < nalu_size) break;
nalu_type = evc_get_nalu_type(data, bytes_to_read);
if (nalu_type < EVC_NOIDR_NUT || nalu_type > EVC_UNSPEC_NUT62) {
ret = AVERROR_INVALIDDATA;
goto end;
}
// @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.3
// NAL_unit_type indicates the type of the NAL units in the following array (which shall be all of that type);
// - it takes a value as defined in ISO/IEC 23094-1;
// - it is restricted to take one of the values indicating a SPS, PPS, APS, or SEI NAL unit.
switch (nalu_type) {
case EVC_SPS_NUT:
array_index = SPS_INDEX;
break;
case EVC_PPS_NUT:
array_index = PPS_INDEX;
break;
case EVC_APS_NUT:
array_index = APS_INDEX;
break;
case EVC_SEI_NUT:
array_index = SEI_INDEX;
break;
default:
array_index = -1;
break;
}
if( (array_index == SPS_INDEX) ||
(array_index == PPS_INDEX) ||
(array_index == APS_INDEX) ||
(array_index == SEI_INDEX) ) {
ret = evcc_array_add_nal_unit(data, nalu_size, nalu_type, ps_array_completeness, &(evcc.arrays[array_index]));
if (ret < 0)
goto end;
if (evcc.arrays[array_index].numNalus == 1)
evcc.num_of_arrays++;
if(nalu_type == EVC_SPS_NUT) {
ret = evcc_parse_sps(data, nalu_size, &evcc);
if (ret < 0)
goto end;
}
}
data += nalu_size;
bytes_to_read -= nalu_size;
}
ret = evcc_write(pb, &evcc);
end:
evcc_close(&evcc);
return ret;
}
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