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
// |
|
// 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 |