2016-01-24 05:03:01 chip
Page 1535
📢 PUBLIC
From Jay Tennant.
Wave.h:
//wave.h
//by Jay Tennant 3/4/12
//Wave helper class, to load simple wave files
//win32developer.com
//this code provided free, as in public domain; score!
#ifndef __WAVE_H__
#define __WAVE_H__
#include <windows.h>
#include <xaudio2.h>
#include <fstream>
class Wave {
private:
WAVEFORMATEX m_wf;
XAUDIO2_BUFFER m_xa;
BYTE* m_waveData;
public:
Wave(const char* szFile = NULL): m_waveData(NULL) {
ZeroMemory(&m_wf,sizeof(m_wf));
ZeroMemory(&m_xa,sizeof(m_xa));
load(szFile);
}
Wave(const Wave& c): m_waveData(NULL) {
m_wf = c.m_wf;
m_xa = c.m_xa;
if(c.m_waveData) {
m_waveData = new BYTE[m_xa.AudioBytes];
memcpy(m_waveData,c.m_waveData,m_xa.AudioBytes);
m_xa.pAudioData = m_waveData;
}
}
~Wave() {
if(m_waveData)
delete[] m_waveData;
m_waveData = NULL;
}
const XAUDIO2_BUFFER* xaBuffer() const {
return &m_xa;
}
const WAVEFORMATEX* wf() const {
return &m_wf;
}
bool load(const char* szFile) {
if(szFile == NULL)
return false;
std::ifstream inFile(szFile,std::ios::binary | std::ios::in);
if(inFile.bad())
return false;
DWORD dwChunkId = 0,dwFileSize = 0,dwChunkSize = 0,dwExtra = 0;
//look for 'RIFF' chunk identifier
inFile.seekg(0,std::ios::beg);
inFile.read(reinterpret_cast<char*>(&dwChunkId),sizeof(dwChunkId));
if(dwChunkId != 'FFIR') {
inFile.close();
return false;
}
inFile.seekg(4,std::ios::beg); //get file size
inFile.read(reinterpret_cast<char*>(&dwFileSize),sizeof(dwFileSize));
if(dwFileSize <= 16) {
inFile.close();
return false;
}
inFile.seekg(8,std::ios::beg); //get file format
inFile.read(reinterpret_cast<char*>(&dwExtra),sizeof(dwExtra));
if(dwExtra != 'EVAW') {
inFile.close();
return false;
}
//look for 'fmt ' chunk id
bool bFilledFormat = false;
for(unsigned int i = 12; i < dwFileSize; ) {
inFile.seekg(i,std::ios::beg);
inFile.read(reinterpret_cast<char*>(&dwChunkId),sizeof(dwChunkId));
inFile.seekg(i + 4,std::ios::beg);
inFile.read(reinterpret_cast<char*>(&dwChunkSize),sizeof(dwChunkSize));
if(dwChunkId == ' tmf') {
inFile.seekg(i + 8,std::ios::beg);
inFile.read(reinterpret_cast<char*>(&m_wf),sizeof(m_wf));
bFilledFormat = true;
break;
}
dwChunkSize += 8; //add offsets of the chunk id, and chunk size data entries
dwChunkSize += 1;
dwChunkSize &= 0xfffffffe; //guarantees WORD padding alignment
i += dwChunkSize;
}
if(!bFilledFormat) {
inFile.close();
return false;
}
//look for 'data' chunk id
bool bFilledData = false;
for(unsigned int i = 12; i < dwFileSize; ) {
inFile.seekg(i,std::ios::beg);
inFile.read(reinterpret_cast<char*>(&dwChunkId),sizeof(dwChunkId));
inFile.seekg(i + 4,std::ios::beg);
inFile.read(reinterpret_cast<char*>(&dwChunkSize),sizeof(dwChunkSize));
if(dwChunkId == 'atad') {
m_waveData = new BYTE[dwChunkSize];
inFile.seekg(i + 8,std::ios::beg);
inFile.read(reinterpret_cast<char*>(m_waveData),dwChunkSize);
m_xa.AudioBytes = dwChunkSize;
m_xa.pAudioData = m_waveData;
m_xa.PlayBegin = 0;
m_xa.PlayLength = 0;
bFilledData = true;
break;
}
dwChunkSize += 8; //add offsets of the chunk id, and chunk size data entries
dwChunkSize += 1;
dwChunkSize &= 0xfffffffe; //guarantees WORD padding alignment
i += dwChunkSize;
}
if(!bFilledData) {
inFile.close();
return false;
}
inFile.close();
return true;
}
};
#endif
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