mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-25 16:52:31 +00:00
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef AVFORMAT_EVC_H
|
|
#define AVFORMAT_EVC_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/rational.h"
|
|
#include "libavcodec/evc.h"
|
|
#include "avio.h"
|
|
|
|
static inline int evc_get_nalu_type(const uint8_t *p, int bits_size)
|
|
{
|
|
int unit_type_plus1 = 0;
|
|
|
|
if (bits_size >= EVC_NALU_HEADER_SIZE) {
|
|
// forbidden_zero_bit
|
|
if ((p[0] & 0x80) != 0) // Cannot get bitstream information. Malformed bitstream.
|
|
return -1;
|
|
|
|
// nal_unit_type
|
|
unit_type_plus1 = (p[0] >> 1) & 0x3F;
|
|
}
|
|
|
|
return unit_type_plus1 - 1;
|
|
}
|
|
|
|
static inline uint32_t evc_read_nal_unit_length(const uint8_t *bits, int bits_size)
|
|
{
|
|
if (bits_size >= EVC_NALU_LENGTH_PREFIX_SIZE)
|
|
return AV_RB32(bits);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Writes EVC sample metadata to the provided AVIOContext.
|
|
*
|
|
* @param pb pointer to the AVIOContext where the evc sample metadata shall be written
|
|
* @param buf input data buffer
|
|
* @param size size in bytes of the input data buffer
|
|
* @param ps_array_completeness @see ISO/IEC 14496-15:2021 Coding of audio-visual objects - Part 15: section 12.3.3.3
|
|
*
|
|
* @return 0 in case of success, a negative error code in case of failure
|
|
*/
|
|
int ff_isom_write_evcc(AVIOContext *pb, const uint8_t *data,
|
|
int size, int ps_array_completeness);
|
|
|
|
#endif // AVFORMAT_EVC_H
|