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avcodec/avs2: add AVS2 related definitions

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Replace magic numbers by enum values.

Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili 2022-06-13 11:36:32 +08:00 committed by Zhao Zhili
parent 2e6e28ebc1
commit 592a9e57d9
2 changed files with 42 additions and 5 deletions
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41
libavcodec/avs2.h Normal file
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@ -0,0 +1,41 @@
/*
* AVS2 related definitions
*
* Copyright (C) 2022 Zhao Zhili, <zhilizhao@tencent.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 AVCODEC_AVS2_H
#define AVCODEC_AVS2_H
#define AVS2_SLICE_MAX_START_CODE 0x000001AF
enum {
AVS2_SEQ_START_CODE = 0xB0,
AVS2_SEQ_END_CODE = 0xB1,
AVS2_USER_DATA_START_CODE = 0xB2,
AVS2_INTRA_PIC_START_CODE = 0xB3,
// reserved = 0xB4,
AVS2_EXTENSION_START_CODE = 0xB5,
AVS2_INTER_PIC_START_CODE = 0xB6,
};
#define AVS2_ISPIC(x) ((x) == AVS2_INTRA_PIC_START_CODE || (x) == AVS2_INTER_PIC_START_CODE)
#define AVS2_ISUNIT(x) ((x) == AVS2_SEQ_START_CODE || (x) == AVS2_SEQ_END_CODE || (x) == AVS2_USER_DATA_START_CODE || AVS2_ISPIC(x))
#endif

6
libavcodec/avs2_parser.c
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@ -19,13 +19,9 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avs2.h"
#include "parser.h"
#define AVS2_SLICE_MAX_START_CODE 0x000001AF
#define AVS2_ISPIC(x) ((x) == 0xB3 || (x) == 0xB6)
#define AVS2_ISUNIT(x) ((x) == 0xB0 || (x) == 0xB1 || (x) == 0xB2 || AVS2_ISPIC(x))
static int avs2_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
{
int pic_found = pc->frame_start_found;