//
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// amrFileCodec.h
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// amrDemoForiOS
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//
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// Created by Tang Xiaoping on 9/27/11.
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// Copyright 2011 test. All rights reserved.
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//
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#ifndef amrFileCodec_h
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#define amrFileCodec_h
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include "interf_dec.h"
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#include "interf_enc.h"
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#define AMR_MAGIC_NUMBER "#!AMR\n"
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#define MP3_MAGIC_NUMBER "ID3"
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#define PCM_FRAME_SIZE 160 // 8khz 8000*0.02=160
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#define MAX_AMR_FRAME_SIZE 32
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#define AMR_FRAME_COUNT_PER_SECOND 50
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typedef struct
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{
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char chChunkID[4];
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int nChunkSize;
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}EM_XCHUNKHEADER;
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typedef struct
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{
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short nFormatTag;
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short nChannels;
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int nSamplesPerSec;
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int nAvgBytesPerSec;
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short nBlockAlign;
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short nBitsPerSample;
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}EM_WAVEFORMAT;
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typedef struct
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{
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short nFormatTag;
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short nChannels;
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int nSamplesPerSec;
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int nAvgBytesPerSec;
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short nBlockAlign;
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short nBitsPerSample;
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short nExSize;
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}EM_WAVEFORMATX;
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typedef struct
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{
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char chRiffID[4];
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int nRiffSize;
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char chRiffFormat[4];
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}EM_RIFFHEADER;
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typedef struct
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{
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char chFmtID[4];
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int nFmtSize;
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EM_WAVEFORMAT wf;
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}EM_FMTBLOCK;
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// WAVE audio processing frequency is 8khz
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// audio processing unit = 8000*0.02 = 160 (decided by audio processing frequency)
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// audio channels 1 : 160
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// 2 : 160*2 = 320
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// bps decides the size of processing sample
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// bps = 8 --> 8 bits
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// 16 --> 16 bit
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int EM_EncodeWAVEFileToAMRFile(const char* pchWAVEFilename, const char* pchAMRFileName, int nChannels, int nBitsPerSample);
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int EM_DecodeAMRFileToWAVEFile(const char* pchAMRFileName, const char* pchWAVEFilename);
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int isMP3File(const char *filePath);
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int isAMRFile(const char *filePath);
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#endif
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