mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
104 lines
2.8 KiB
104 lines
2.8 KiB
/* |
|
* Copyright (C) 2017 foo86 |
|
* |
|
* 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_DOLBY_E_H |
|
#define AVCODEC_DOLBY_E_H |
|
|
|
#include <stdint.h> |
|
#include "get_bits.h" |
|
|
|
#define FRAME_SAMPLES 1792 |
|
|
|
#define MAX_PROG_CONF 23 |
|
#define MAX_PROGRAMS 8 |
|
#define MAX_CHANNELS 8 |
|
|
|
/** |
|
* @struct DBEContext |
|
* Dolby E reading context used by decoder and parser. |
|
*/ |
|
typedef struct DBEContext { |
|
void *avctx; |
|
GetBitContext gb; |
|
|
|
const uint8_t *input; |
|
int input_size; |
|
|
|
int word_bits; |
|
int word_bytes; |
|
int key_present; |
|
|
|
uint8_t buffer[1024 * 3 + AV_INPUT_BUFFER_PADDING_SIZE]; |
|
} DBEContext; |
|
|
|
/** |
|
* @struct DolbyEHeaderInfo |
|
* Coded Dolby E header values up to end_gain element, plus derived values. |
|
*/ |
|
typedef struct DolbyEHeaderInfo { |
|
/** @name Coded elements |
|
* @{ |
|
*/ |
|
int prog_conf; |
|
int nb_channels; |
|
int nb_programs; |
|
|
|
int fr_code; |
|
int fr_code_orig; |
|
|
|
int ch_size[MAX_CHANNELS]; |
|
int mtd_ext_size; |
|
int meter_size; |
|
|
|
int rev_id[MAX_CHANNELS]; |
|
int begin_gain[MAX_CHANNELS]; |
|
int end_gain[MAX_CHANNELS]; |
|
/** @} */ |
|
|
|
/** @name Derived values |
|
* @{ |
|
*/ |
|
int multi_prog_warned; |
|
/** @} */ |
|
} DolbyEHeaderInfo; |
|
|
|
static const uint16_t sample_rate_tab[16] = { |
|
0, 42965, 43008, 44800, 53706, 53760 |
|
}; |
|
/** |
|
* Initialize DBEContext. |
|
* Set word_bits/word_bytes, input, input_size, key_present. |
|
* @param[out] s DBEContext. |
|
* @param[in] buf raw input buffer. |
|
* @param[in] buf_size must be 3 bytes at least. |
|
* @return Returns 0 on success, AVERROR_INVALIDDATA on error |
|
*/ |
|
int ff_dolby_e_parse_init(DBEContext *s, const uint8_t *buf, int buf_size); |
|
|
|
/** |
|
* Parse Dolby E metadata. |
|
* Parse the header up to the end_gain element. |
|
* @param[in] s DBEContext . |
|
* @param[out] hdr Pointer to struct where header info is written. |
|
* @return Returns 0 on success, AVERROR_INVALIDDATA on error |
|
*/ |
|
int ff_dolby_e_parse_header(DBEContext *s, DolbyEHeaderInfo *hdr); |
|
|
|
#endif
|
|
|