mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
81d070dd09
Neither module should depend on the other. Move shared functions to its own file for this purpose, and ensure source files are compiled only when the required modules are enabled. Signed-off-by: James Almer <jamrial@gmail.com>
105 lines
2.8 KiB
C
105 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 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
|