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This commit is contained in:
Gerolf Ziegenhain 2016-10-04 16:59:41 +02:00
parent 0d9924f9e6
commit ae5dffa383
1 changed files with 8 additions and 5 deletions
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13
src/beep.c
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@ -215,13 +215,16 @@ int beep(double freq_hz, double duration_sec)
double p1,p2,f1,f2; double p1,p2,f1,f2;
unsigned int i,j; unsigned int i,j;
snd_pcm_sframes_t frames; snd_pcm_sframes_t frames;
int up_count = SAMPLE_RATE * msecs / 1000;
f1 = 0.02; f1 = 0.02;
f2 = 0.02; f2 = 0.02;
p1 = p2 = 0.0; p1 = p2 = 0.0;
for (i = 0; i < 3; i++) { //for (i = 0; i < 3; i++) {
for (j = 0; j < FRAMES*2; j+=2) //for (j = 0; j < FRAMES*2; j+=2)
for (j = 0; j < up_count*2; j+=2)
{ {
buffer[j] = freq_hz*100.0 * sin(p1); buffer[j] = freq_hz*100.0 * sin(p1);
buffer[j+1] = freq_hz*100.0 * sin(p2); buffer[j+1] = freq_hz*100.0 * sin(p2);
@ -238,7 +241,7 @@ int beep(double freq_hz, double duration_sec)
} }
if (frames > 0 && frames < FRAMES) if (frames > 0 && frames < FRAMES)
printf("Short write (expected %li, wrote %li)\n", FRAMES, (long)frames); printf("Short write (expected %li, wrote %li)\n", FRAMES, (long)frames);
} //}
return 0; return 0;
} }
@ -254,7 +257,7 @@ int beep_init()
SND_PCM_FORMAT_S16_LE, SND_PCM_FORMAT_S16_LE,
SND_PCM_ACCESS_RW_INTERLEAVED, SND_PCM_ACCESS_RW_INTERLEAVED,
2, 2,
48000, SAMPLE_RATE,
1, 1,
500000)) < 0) { /* 0.5sec */ 500000)) < 0) { /* 0.5sec */
printf("Playback open error: %s\n", snd_strerror(err)); printf("Playback open error: %s\n", snd_strerror(err));