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This commit is contained in:
Serge Zaitsev
2023-01-18 13:17:12 +01:00
parent 01b96eac45
commit 6ba8e02f44
2 changed files with 28 additions and 22 deletions
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33
examples/sound-c/main.c
View File

@ -20,25 +20,26 @@ static int run() {
.height = H, .height = H,
.buf = buf, .buf = buf,
}; };
struct fenster_audio fa = {0}; struct fenster_audio fa = {0};
fenster_open(&f); fenster_open(&f);
fenster_audio_open(&fa); fenster_audio_open(&fa);
uint32_t t, u = 0; uint32_t t, u = 0;
float audio[FENSTER_AUDIO_BUFSZ]; float audio[FENSTER_AUDIO_BUFSZ];
int64_t now = fenster_time(); int64_t now = fenster_time();
while (fenster_loop(&f) == 0) { while (fenster_loop(&f) == 0) {
t++; t++;
int n = fenster_audio_available(&fa); int n = fenster_audio_available(&fa);
if (n > 0) { if (n > 0) {
for (int i = 0; i < n; i++) { for (int i = 0; i < n; i++) {
u++; u++;
/*audio[i] = (rand() & 0xff)/256.f;*/ /*audio[i] = (rand() & 0xff)/256.f;*/
int x = u * 80/441; int x = u * 80 / 441;
audio[i] = ((((x >> 10) & 42) * x)&0xff)/256.f; audio[i] = ((((x >> 10) & 42) * x) & 0xff) / 256.f;
} }
fenster_audio_write(&fa, audio, n); fenster_audio_write(&fa, audio, n);
} }
if (f.keys[27]) break; if (f.keys[27])
break;
for (int i = 0; i < 320; i++) { for (int i = 0; i < 320; i++) {
for (int j = 0; j < 240; j++) { for (int j = 0; j < 240; j++) {
@ -54,11 +55,11 @@ static int run() {
} }
int64_t time = fenster_time(); int64_t time = fenster_time();
if (time - now < 1000 / 60) { if (time - now < 1000 / 60) {
fenster_sleep(time - now); fenster_sleep(time - now);
} }
now = time; now = time;
} }
fenster_audio_close(&fa); fenster_audio_close(&fa);
fenster_close(&f); fenster_close(&f);
return 0; return 0;
} }

15
fenster_audio.h
View File

@ -100,21 +100,26 @@ int snd_pcm_writei(void *, const void *, unsigned long);
int snd_pcm_recover(void *, int, int); int snd_pcm_recover(void *, int, int);
int snd_pcm_close(void *); int snd_pcm_close(void *);
FENSTER_API int fenster_audio_open(struct fenster_audio *fa) { FENSTER_API int fenster_audio_open(struct fenster_audio *fa) {
if (snd_pcm_open(&fa->pcm, "default", 0, 0)) return -1; if (snd_pcm_open(&fa->pcm, "default", 0, 0))
int fmt = (*(unsigned char *)(&(uint16_t){1}))?14:15; return -1;
int fmt = (*(unsigned char *)(&(uint16_t){1})) ? 14 : 15;
return snd_pcm_set_params(fa->pcm, fmt, 3, 1, FENSTER_SAMPLE_RATE, 1, 100000); return snd_pcm_set_params(fa->pcm, fmt, 3, 1, FENSTER_SAMPLE_RATE, 1, 100000);
} }
FENSTER_API int fenster_audio_available(struct fenster_audio *fa) { FENSTER_API int fenster_audio_available(struct fenster_audio *fa) {
int n = snd_pcm_avail(fa->pcm); int n = snd_pcm_avail(fa->pcm);
if (n < 0) snd_pcm_recover(fa->pcm, n, 0); if (n < 0)
snd_pcm_recover(fa->pcm, n, 0);
return n; return n;
} }
FENSTER_API void fenster_audio_write(struct fenster_audio *fa, float *buf, FENSTER_API void fenster_audio_write(struct fenster_audio *fa, float *buf,
size_t n) { size_t n) {
int r = snd_pcm_writei(fa->pcm, buf, n); int r = snd_pcm_writei(fa->pcm, buf, n);
if (r < 0) snd_pcm_recover(fa->pcm, r, 0); if (r < 0)
snd_pcm_recover(fa->pcm, r, 0);
}
FENSTER_API void fenster_audio_close(struct fenster_audio *fa) {
snd_pcm_close(fa->pcm);
} }
FENSTER_API void fenster_audio_close(struct fenster_audio *fa) { snd_pcm_close(fa->pcm); }
#endif #endif
#endif /* FENSTER_HEADER */ #endif /* FENSTER_HEADER */