mirror of
https://mirror.skon.top/https://github.com/FFmpeg/FFmpeg
synced 2026-04-20 21:00:41 +08:00
d1431d3f50
The specification for H.26{4,5,6} states that start codes may be three or four
bytes long long except for the first NALU in an AU, and for NALUs of parameter
set types, which must be four bytes long.
This is checked by ff_cbs_h2645_unit_requires_zero_byte(), which is made
available outside of CBS for this change.
Signed-off-by: James Almer <jamrial@gmail.com>
77 lines
3.2 KiB
C
77 lines
3.2 KiB
C
/*
|
|
* 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 AVCODEC_CBS_H2645_H
|
|
#define AVCODEC_CBS_H2645_H
|
|
|
|
#include "cbs.h"
|
|
#include "h2645_parse.h"
|
|
|
|
|
|
typedef struct CodedBitstreamH2645Context {
|
|
// If set, the stream being read is in MP4 (AVCC/HVCC) format. If not
|
|
// set, the stream is assumed to be in annex B format.
|
|
int mp4;
|
|
// Size in bytes of the NAL length field for MP4 format.
|
|
int nal_length_size;
|
|
// Packet reader.
|
|
H2645Packet read_packet;
|
|
} CodedBitstreamH2645Context;
|
|
|
|
struct GetBitContext;
|
|
struct PutBitContext;
|
|
|
|
int ff_cbs_read_ue_golomb(CodedBitstreamContext *ctx, struct GetBitContext *gbc,
|
|
const char *name, const int *subscripts,
|
|
uint32_t *write_to,
|
|
uint32_t range_min, uint32_t range_max);
|
|
int ff_cbs_read_se_golomb(CodedBitstreamContext *ctx, struct GetBitContext *gbc,
|
|
const char *name, const int *subscripts,
|
|
int32_t *write_to,
|
|
int32_t range_min, int32_t range_max);
|
|
int ff_cbs_write_ue_golomb(CodedBitstreamContext *ctx, struct PutBitContext *pbc,
|
|
const char *name, const int *subscripts,
|
|
uint32_t value,
|
|
uint32_t range_min, uint32_t range_max);
|
|
int ff_cbs_write_se_golomb(CodedBitstreamContext *ctx, struct PutBitContext *pbc,
|
|
const char *name, const int *subscripts,
|
|
int32_t value,
|
|
int32_t range_min, int32_t range_max);
|
|
|
|
int ff_cbs_h2645_read_more_rbsp_data(struct GetBitContext *gbc);
|
|
|
|
int ff_cbs_h2645_fragment_add_nals(CodedBitstreamContext *ctx,
|
|
CodedBitstreamFragment *frag,
|
|
const H2645Packet *packet);
|
|
|
|
int ff_cbs_h2645_write_slice_data(CodedBitstreamContext *ctx,
|
|
struct PutBitContext *pbc, const uint8_t *data,
|
|
size_t data_size, int data_bit_start);
|
|
|
|
int ff_cbs_h2645_assemble_fragment(CodedBitstreamContext *ctx,
|
|
CodedBitstreamFragment *frag);
|
|
|
|
/**
|
|
* payload_extension_present() - true if we are before the last 1-bit
|
|
* in the payload structure, which must be in the last byte.
|
|
*/
|
|
int ff_cbs_h2645_payload_extension_present(struct GetBitContext *gbc, uint32_t payload_size,
|
|
int cur_pos);
|
|
|
|
#endif /* AVCODEC_CBS_H2645_H */
|