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.
75 lines
1.5 KiB
75 lines
1.5 KiB
1 year ago
|
//
|
||
|
|
// amrFileCodec.h
|
||
|
|
// amrDemoForiOS
|
||
|
|
//
|
||
|
|
// Created by Tang Xiaoping on 9/27/11.
|
||
|
|
// Copyright 2011 test. All rights reserved.
|
||
|
|
//
|
||
|
|
#ifndef amrFileCodec_h
|
||
|
|
#define amrFileCodec_h
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include "interf_dec.h"
|
||
|
|
#include "interf_enc.h"
|
||
|
|
|
||
|
|
#define AMR_MAGIC_NUMBER "#!AMR\n"
|
||
|
|
|
||
|
|
#define PCM_FRAME_SIZE 160 // 8khz 8000*0.02=160
|
||
|
|
#define MAX_AMR_FRAME_SIZE 32
|
||
|
|
#define AMR_FRAME_COUNT_PER_SECOND 50
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
char chChunkID[4];
|
||
|
|
int nChunkSize;
|
||
|
|
}XCHUNKHEADER;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
short nFormatTag;
|
||
|
|
short nChannels;
|
||
|
|
int nSamplesPerSec;
|
||
|
|
int nAvgBytesPerSec;
|
||
|
|
short nBlockAlign;
|
||
|
|
short nBitsPerSample;
|
||
|
|
}WAVEFORMAT;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
short nFormatTag;
|
||
|
|
short nChannels;
|
||
|
|
int nSamplesPerSec;
|
||
|
|
int nAvgBytesPerSec;
|
||
|
|
short nBlockAlign;
|
||
|
|
short nBitsPerSample;
|
||
|
|
short nExSize;
|
||
|
|
}WAVEFORMATX;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
char chRiffID[4];
|
||
|
|
int nRiffSize;
|
||
|
|
char chRiffFormat[4];
|
||
|
|
}RIFFHEADER;
|
||
|
|
|
||
|
|
typedef struct
|
||
|
|
{
|
||
|
|
char chFmtID[4];
|
||
|
|
int nFmtSize;
|
||
|
|
WAVEFORMAT wf;
|
||
|
|
}FMTBLOCK;
|
||
|
|
|
||
|
|
// WAVE音频采样频率是8khz
|
||
|
|
// 音频样本单元数 = 8000*0.02 = 160 (由采样频率决定)
|
||
|
|
// 声道数 1 : 160
|
||
|
|
// 2 : 160*2 = 320
|
||
|
|
// bps决定样本(sample)大小
|
||
|
|
// bps = 8 --> 8位 unsigned char
|
||
|
|
// 16 --> 16位 unsigned short
|
||
|
|
int EncodeWAVEFileToAMRFile(const char* pchWAVEFilename, const char* pchAMRFileName, int nChannels, int nBitsPerSample);
|
||
|
|
|
||
|
|
// 将AMR文件解码成WAVE文件
|
||
|
|
int DecodeAMRFileToWAVEFile(const char* pchAMRFileName, const char* pchWAVEFilename);
|
||
|
|
|
||
|
|
#endif
|