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add audio for winmm (8bit for now)

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Serge Zaitsev
2023-01-18 14:08:23 +01:00
parent 6ba8e02f44
commit 6defe57cd2
1 changed files with 41 additions and 6 deletions
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47
fenster_audio.h
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@ -19,7 +19,14 @@ struct fenster_audio {
dispatch_semaphore_t full;
};
#elif defined(_WIN32)
struct fenster_audio {};
#include <mmsystem.h>
#include <windows.h>
struct fenster_audio {
WAVEHDR header;
HWAVEOUT wo;
WAVEHDR hdr[2];
char buf[2][FENSTER_AUDIO_BUFSZ];
};
#elif defined(__linux__)
struct fenster_audio {
void *pcm;
@ -87,11 +94,39 @@ FENSTER_API void fenster_audio_write(struct fenster_audio *fa, float *buf,
}
#elif defined(_WIN32)
/* TODO */
FENSTER_API int fenster_audio_open(struct fenster_audio *f) { return -1; }
FENSTER_API int fenster_audio_available(struct fenster_audio *f) { return -1; }
FENSTER_API void fenster_audio_write(struct fenster_audio *f, float *buf,
size_t n) {}
FENSTER_API void fenster_audio_close(struct fenster_audio *f) {}
FENSTER_API int fenster_audio_open(struct fenster_audio *fa) {
WAVEFORMATEX wfx = {
WAVE_FORMAT_PCM, 1, FENSTER_SAMPLE_RATE, FENSTER_SAMPLE_RATE, 1, 8, 0};
waveOutOpen(&fa->wo, WAVE_MAPPER, &wfx, 0, 0, CALLBACK_NULL);
for (int i = 0; i < 2; i++) {
fa->hdr[i].lpData = fa->buf[i];
fa->hdr[i].dwBufferLength = FENSTER_AUDIO_BUFSZ;
waveOutPrepareHeader(fa->wo, &fa->hdr[i], sizeof(WAVEHDR));
waveOutWrite(fa->wo, &fa->hdr[i], sizeof(WAVEHDR));
}
return 0;
}
FENSTER_API int fenster_audio_available(struct fenster_audio *fa) {
for (int i = 0; i < 2; i++)
if (fa->hdr[i].dwFlags & WHDR_DONE)
return FENSTER_AUDIO_BUFSZ;
return 0;
}
FENSTER_API void fenster_audio_write(struct fenster_audio *fa, float *buf,
size_t n) {
for (int i = 0; i < 2; i++) {
if (fa->hdr[i].dwFlags & WHDR_DONE) {
for (unsigned j = 0; j < n; j++) {
fa->buf[i][j] = (uint8_t)(buf[j] * 256);
}
waveOutWrite(fa->wo, &fa->hdr[i], sizeof(WAVEHDR));
return;
}
}
}
FENSTER_API void fenster_audio_close(struct fenster_audio *fa) {
waveOutClose(fa->wo);
}
#elif defined(__linux__)
int snd_pcm_open(void **, const char *, int, int);
int snd_pcm_set_params(void *, int, int, int, int, int, int);