50 lines
1.1 KiB
C++
50 lines
1.1 KiB
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include <malloc.h>
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#include <Windows.h>
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#include <MMSystem.h>
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void fill(char *data)
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{
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for (int i = 0; i < 4096; i++)
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{
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data[i] = (i & (i & 512 ? 7 : 3)) << 3;
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}
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}
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static const WAVEFORMATEX fmt = {
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WAVE_FORMAT_PCM, 1, 8000, 8000, 1, 8, 0
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};
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int main(int argc, char *argv[])
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{
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HWAVEOUT out;
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HRESULT rc = waveOutOpen(&out, WAVE_MAPPER, &fmt, NULL, NULL, CALLBACK_NULL);
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if (rc != MMSYSERR_NOERROR)
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{
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printf("error %d on open\n");
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exit(1);
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}
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WAVEHDR bufs[2] = {
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{ (char *)malloc(4096), 4096 },
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{ (char *)malloc(4096), 4096 },
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};
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int i = 0;
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fill(bufs[i].lpData);
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bufs[i].dwFlags = WHDR_PREPARED;
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waveOutPrepareHeader(out, bufs + i, sizeof(WAVEHDR));
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waveOutWrite(out, bufs + i, sizeof(WAVEHDR));
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i ^= 1;
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while (!(GetAsyncKeyState(VK_ESCAPE) & 1))
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{
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fill(bufs[i].lpData);
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bufs[i].dwFlags = WHDR_PREPARED;
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waveOutPrepareHeader(out, bufs + i, sizeof(WAVEHDR));
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waveOutWrite(out, bufs + i, sizeof(WAVEHDR));
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i ^= 1;
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while (waveOutUnprepareHeader(out, bufs + i, sizeof(WAVEHDR)) == WAVERR_STILLPLAYING);
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}
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}
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