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| #include <iostream.h>
#include <windows.h>
#include <mmsystem.h>
#include <stdio.h>
#define BLOCK_SIZE 1024*4
#define BLOCK_COUNT 6
WAVEHDR* waveBlocks;
int waveFreeBlockCount;
int waveCurrentBlock;
void CALLBACK waveOutProc(HWAVEOUT hWaveOut,UINT uMsg,DWORD dwInstance,DWORD dwParam1,DWORD dwParam2){
int *freeBlockCounter = (int*)dwInstance;
if(uMsg!=WOM_DONE) return;
(*freeBlockCounter)++;
return;
}
WAVEHDR* allocateBlocks(int size,int count){
char* buffer;
int i;
WAVEHDR* blocks;
DWORD totalBufferSize = size*count;
if((buffer = (unsigned char*) HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY, totalBufferSize)) == NULL)
{
printf("Ошибка при выделение памяти\n");
getchar();
ExitProcess(1);
}
blocks = (WAVEHDR*)buffer;
buffer += sizeof(WAVEHDR)*count;
for(i=0; i < count; i++)
{
blocks[i].dwBufferLength = size;
blocks[i].lpData = buffer;
buffer += size;
}
return blocks;
}
void freeBlocks(WAVEHDR* blockArray){
HeapFree(GetProcessHeap(),0,blockArray);
return;
}
void writeAudio(HWAVEOUT hWaveOut,char *data,int size){
WAVEHDR* current;
int remain;
current = &waveBlocks[waveCurrentBlock];
while(size>0){
if(size < (int)(BLOCK_SIZE - current->dwUser)){
memcpy(current->lpData + current->dwUser,data,size);
current->dwUser += size;
break;
}
remain = BLOCK_SIZE-current->dwUser;
memcpy(current->lpData+current->dwUser,data,remain);
size -= remain;
data += remain;
current->dwBufferLength = BLOCK_SIZE;
waveOutPrepareHeader(hWaveOut,current,sizeof(WAVEHDR));
waveOutWrite(hWaveOut,current,sizeof(WAVEHDR));
waveFreeBlockCount--;
while(!waveFreeBlockCount) Sleep(5);
waveCurrentBlock++;
waveCurrentBlock %= BLOCK_COUNT;
cout << "" << waveCurrentBlock;
current = &waveBlocks[waveCurrentBlock];
current->dwUser = 0;
}
return;
}
int main()
{
HWAVEOUT hWaveOut;
HANDLE hFile;
WAVEFORMATEX wfx;
char buffer[1024]; /* промежуточный буфер чтения */
int i;
waveBlocks = allocateBlocks(BLOCK_SIZE, BLOCK_COUNT);
waveFreeBlockCount = BLOCK_COUNT;
waveCurrentBlock= 0;
if((hFile = CreateFile(
"D:\\b.wav",
GENERIC_READ,
FILE_SHARE_READ,
NULL,
OPEN_EXISTING,
0,
NULL
)) == INVALID_HANDLE_VALUE) {
printf("неудается открыть файл\n");
getchar();
}
wfx.nSamplesPerSec = 44100;
wfx.wBitsPerSample = 16;
wfx.nChannels= 2; wfx.wFormatTag = WAVE_FORMAT_PCM;
wfx.nBlockAlign = (wfx.wBitsPerSample * wfx.nChannels) / 8 ;
wfx.nAvgBytesPerSec = wfx.nBlockAlign * wfx.nSamplesPerSec;
if(waveOutOpen(
&hWaveOut,
WAVE_MAPPER,
&wfx,
(DWORD_PTR)waveOutProc,
(DWORD_PTR)&waveFreeBlockCount,
CALLBACK_FUNCTION
) != MMSYSERR_NOERROR) {
printf("не удалось открыть устройство");
getchar();
ExitProcess(1);
}
while(1) {
DWORD readBytes;
if(!ReadFile(hFile, buffer, sizeof(buffer), &readBytes, NULL))
break;
writeAudio(hWaveOut, buffer, sizeof(buffer));
}
waveOutUnprepareHeader(hWaveOut, &waveBlocks[i], sizeof(WAVEHDR));
freeBlocks(waveBlocks);
waveOutClose(hWaveOut);
CloseHandle(hFile);
return 0;
} |
(
