mirror of https://git.ffmpeg.org/ffmpeg.git
106 lines
2.8 KiB
C
106 lines
2.8 KiB
C
/*
|
|
* 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 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;
|
|
|
|
int output_channel_order;
|
|
|
|
int sample_rate;
|
|
/** @} */
|
|
} DolbyEHeaderInfo;
|
|
|
|
/**
|
|
* @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;
|
|
|
|
DolbyEHeaderInfo metadata;
|
|
|
|
uint8_t buffer[1024 * 3 + AV_INPUT_BUFFER_PADDING_SIZE];
|
|
} DBEContext;
|
|
|
|
/**
|
|
* Use the provided key to transform the input into data (put into s->buffer)
|
|
* suitable for further processing and initialize s->gb to read said data.
|
|
*/
|
|
int ff_dolby_e_convert_input(DBEContext *s, int nb_words, int key);
|
|
|
|
/**
|
|
* Initialize DBEContext and parse Dolby E metadata.
|
|
* Set word_bits/word_bytes, input, input_size, key_present
|
|
* and parse the header up to the end_gain element.
|
|
* @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_header(DBEContext *s, const uint8_t *buf, int buf_size);
|
|
|
|
#endif
|