mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
6e5e74c55b
In particular, don't include avcodec.h in evc_frame_merge_bsf.c. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
106 lines
4.6 KiB
C
106 lines
4.6 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* EVC decoder/parser shared code
|
|
*/
|
|
|
|
#ifndef AVCODEC_EVC_PARSE_H
|
|
#define AVCODEC_EVC_PARSE_H
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/intreadwrite.h"
|
|
#include "libavutil/log.h"
|
|
#include "evc.h"
|
|
#include "evc_ps.h"
|
|
|
|
// The sturcture reflects Slice Header RBSP(raw byte sequence payload) layout
|
|
// @see ISO_IEC_23094-1 section 7.3.2.6
|
|
//
|
|
// The following descriptors specify the parsing process of each element
|
|
// u(n) - unsigned integer using n bits
|
|
// ue(v) - unsigned integer 0-th order Exp_Golomb-coded syntax element with the left bit first
|
|
// u(n) - unsigned integer using n bits.
|
|
// When n is "v" in the syntax table, the number of bits varies in a manner dependent on the value of other syntax elements.
|
|
typedef struct EVCParserSliceHeader {
|
|
uint8_t slice_pic_parameter_set_id; // ue(v)
|
|
uint8_t single_tile_in_slice_flag; // u(1)
|
|
uint8_t first_tile_id; // u(v)
|
|
uint8_t arbitrary_slice_flag; // u(1)
|
|
uint8_t last_tile_id; // u(v)
|
|
uint32_t num_remaining_tiles_in_slice_minus1; // ue(v)
|
|
uint16_t delta_tile_id_minus1[EVC_MAX_TILE_ROWS * EVC_MAX_TILE_COLUMNS]; // ue(v)
|
|
|
|
uint8_t slice_type; // ue(v)
|
|
uint8_t no_output_of_prior_pics_flag; // u(1)
|
|
uint8_t mmvd_group_enable_flag; // u(1)
|
|
uint8_t slice_alf_enabled_flag; // u(1)
|
|
|
|
uint8_t slice_alf_luma_aps_id; // u(5)
|
|
uint8_t slice_alf_map_flag; // u(1)
|
|
uint8_t slice_alf_chroma_idc; // u(2)
|
|
uint8_t slice_alf_chroma_aps_id; // u(5)
|
|
uint8_t slice_alf_chroma_map_flag; // u(1)
|
|
uint8_t slice_alf_chroma2_aps_id; // u(5)
|
|
uint8_t slice_alf_chroma2_map_flag; // u(1)
|
|
uint16_t slice_pic_order_cnt_lsb; // u(v)
|
|
|
|
// @note
|
|
// Currently the structure does not reflect the entire Slice Header RBSP layout.
|
|
// It contains only the fields that are necessary to read from the NAL unit all the values
|
|
// necessary for the correct initialization of the AVCodecContext structure.
|
|
|
|
// @note
|
|
// If necessary, add the missing fields to the structure to reflect
|
|
// the contents of the entire NAL unit of the SPS type
|
|
|
|
} EVCParserSliceHeader;
|
|
|
|
// picture order count of the current picture
|
|
typedef struct EVCParserPoc {
|
|
int PicOrderCntVal; // current picture order count value
|
|
int prevPicOrderCntVal; // the picture order count of the previous Tid0 picture
|
|
int DocOffset; // the decoding order count of the previous picture
|
|
} EVCParserPoc;
|
|
|
|
static inline uint32_t evc_read_nal_unit_length(const uint8_t *bits, int bits_size, void *logctx)
|
|
{
|
|
uint32_t nalu_len = 0;
|
|
|
|
if (bits_size < EVC_NALU_LENGTH_PREFIX_SIZE) {
|
|
av_log(logctx, AV_LOG_ERROR, "Can't read NAL unit length\n");
|
|
return 0;
|
|
}
|
|
|
|
nalu_len = AV_RB32(bits);
|
|
|
|
return nalu_len;
|
|
}
|
|
|
|
int ff_evc_parse_slice_header(GetBitContext *gb, EVCParserSliceHeader *sh,
|
|
const EVCParamSets *ps, enum EVCNALUnitType nalu_type);
|
|
|
|
// POC (picture order count of the current picture) derivation
|
|
// @see ISO/IEC 23094-1:2020(E) 8.3.1 Decoding process for picture order count
|
|
int ff_evc_derive_poc(const EVCParamSets *ps, const EVCParserSliceHeader *sh,
|
|
EVCParserPoc *poc, enum EVCNALUnitType nalu_type, int tid);
|
|
|
|
#endif /* AVCODEC_EVC_PARSE_H */
|