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Calculate ALSA buffer length with the other values

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This commit is contained in:
Chris Robinson
2010-11-23 07:24:27 -08:00
parent c58469e234
commit 13ba253aec
1 changed files with 6 additions and 2 deletions
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Alc/alsa.c
+6 -2
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@@ -562,6 +562,7 @@ static ALCboolean alsa_reset_playback(ALCdevice *device)
allowmmap = GetConfigValueBool("alsa", "mmap", 1);
periods = device->NumUpdates;
periodLen = (ALuint64)device->UpdateSize * 1000000 / device->Frequency;
bufferLen = periodLen * periods;
rate = device->Frequency;
err = NULL;
@@ -572,7 +573,11 @@ static ALCboolean alsa_reset_playback(ALCdevice *device)
/* set interleaved access */
if(i >= 0 && (!allowmmap || (i=psnd_pcm_hw_params_set_access(data->pcmHandle, p, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0))
{
if(periods > 2) periods--;
if(periods > 2)
{
periods--;
bufferLen = periodLen * periods;
}
if((i=psnd_pcm_hw_params_set_access(data->pcmHandle, p, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
err = "set access";
}
@@ -648,7 +653,6 @@ static ALCboolean alsa_reset_playback(ALCdevice *device)
if(i >= 0 && (i=psnd_pcm_hw_params_set_rate_near(data->pcmHandle, p, &rate, NULL)) < 0)
err = "set rate near";
/* set buffer time (implicitly constrains period/buffer parameters) */
bufferLen = periodLen * periods;
if(i >= 0 && (i=psnd_pcm_hw_params_set_buffer_time_near(data->pcmHandle, p, &bufferLen, NULL)) < 0)
err = "set buffer time near";
/* set period time in frame units (implicitly sets buffer size/bytes/time and period size/bytes) */