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Changed stuff

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This commit is contained in:
Themaister 2010-05-28 15:59:49 +02:00
parent ffb92a5a29
commit 1c33a2d790
1 changed files with 19 additions and 5 deletions
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24
alsa.c
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@ -24,6 +24,8 @@ static void* __alsa_init(const char* device, int rate, int latency)
if ( device != NULL )
alsa_dev = device;
//fprintf(stderr, "Opening device: %s\n", alsa_dev);
TRY_ALSA(snd_pcm_open(&alsa->pcm, alsa_dev, SND_PCM_STREAM_PLAYBACK, 0));
unsigned int latency_usec = latency * 1000;
@ -38,17 +40,29 @@ static void* __alsa_init(const char* device, int rate, int latency)
TRY_ALSA(snd_pcm_hw_params_set_format(alsa->pcm, params, format));
TRY_ALSA(snd_pcm_hw_params_set_channels(alsa->pcm, params, channels));
TRY_ALSA(snd_pcm_hw_params_set_rate(alsa->pcm, params, rate, 0));
TRY_ALSA(snd_pcm_hw_params_set_buffer_time_near(alsa->pcm, params, &latency_usec, NULL));
latency_usec = latency * 250;
TRY_ALSA(snd_pcm_hw_params_set_period_time_near(alsa->pcm, params, &latency_usec, NULL));
// We test if we can run the latencies we are allowed, if not, fallback to *_near.
if ( snd_pcm_hw_params_set_buffer_time_max(alsa->pcm, params, &latency_usec, NULL) < 0)
{
latency_usec = latency * 1000;
TRY_ALSA(snd_pcm_hw_params_set_buffer_time_near(alsa->pcm, params, &latency_usec, NULL))
}
latency_usec = (latency < 32) ? 10000 : latency * 250;
if ( snd_pcm_hw_params_set_period_time_max(alsa->pcm, params, &latency_usec, NULL) )
{
latency_usec = (latency < 32) ? 10000 : latency * 250;
TRY_ALSA(snd_pcm_hw_params_set_period_time_near(alsa->pcm, params, &latency_usec, NULL));
}
TRY_ALSA(snd_pcm_hw_params(alsa->pcm, params));
snd_pcm_uframes_t alsa_sizes;
snd_pcm_hw_params_get_period_size(params, &alsa_sizes, NULL);
fprintf(stderr, "Period size: %d\n", (int)alsa_sizes);
//fprintf(stderr, "ALSA Period size: %d frames\n", (int)alsa_sizes);
snd_pcm_hw_params_get_buffer_size(params, &alsa_sizes);
fprintf(stderr, "Buffer size: %d\n", (int)alsa_sizes);
//fprintf(stderr, "Buffer size: %d frames\n", (int)alsa_sizes);
if (snd_pcm_sw_params_malloc(&sw_params) < 0)
goto error;