mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-11-01 22:58:49 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

A try to fix one rouding problem in refine

Browse source
This commit is contained in:
Jaroslav Kysela 2004-02-07 15:01:31 +00:00
parent 9505cbe5d8
commit 37728639ae
1 changed files with 45 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

46
src/pcm/pcm_rate.c
View file

@ -34,6 +34,10 @@
#include "pcm_plugin.h"
#include "iatomic.h"
#if 0
#define DEBUG_REFINE
#endif
#ifndef PIC
/* entry for static linking */
const char *_snd_module_pcm_rate = "";
@ -341,7 +345,10 @@ static int snd_pcm_rate_hw_refine_cchange(snd_pcm_t *pcm, snd_pcm_hw_params_t *p
{
snd_pcm_rate_t *rate = pcm->private_data;
snd_interval_t t;
const snd_interval_t *sbuffer_size;
#ifdef DEBUG_REFINE
snd_output_t *out;
#endif
const snd_interval_t *sbuffer_size, *buffer_size;
const snd_interval_t *srate, *crate;
int err;
unsigned int links = (SND_PCM_HW_PARBIT_CHANNELS |
@ -360,7 +367,44 @@ static int snd_pcm_rate_hw_refine_cchange(snd_pcm_t *pcm, snd_pcm_hw_params_t *p
err = _snd_pcm_hw_param_set_interval(params, SND_PCM_HW_PARAM_BUFFER_SIZE, &t);
if (err < 0)
return err;
buffer_size = snd_pcm_hw_param_get_interval(params, SND_PCM_HW_PARAM_BUFFER_SIZE);
/*
* this condition probably needs more work:
* in case when the buffer_size is known and we are looking
* for best period_size, we should prefer situation when
* (buffer_size / period_size) * period_size == buffer_size
*/
if (snd_interval_single(buffer_size) && buffer_size->integer) {
snd_interval_t *period_size;
period_size = (snd_interval_t *)snd_pcm_hw_param_get_interval(params, SND_PCM_HW_PARAM_PERIOD_SIZE);
if (!snd_interval_checkempty(period_size) &&
period_size->openmin && period_size->openmax &&
period_size->min + 1 == period_size->max) {
if ((buffer_size->min / period_size->min) * period_size->min == buffer_size->min) {
snd_interval_set_value(period_size, period_size->min);
} else if ((buffer_size->max / period_size->max) * period_size->max == buffer_size->max) {
snd_interval_set_value(period_size, period_size->max);
}
}
}
#ifdef DEBUG_REFINE
snd_output_stdio_attach(&out, stderr, 0);
snd_output_printf(out, "REFINE (params):\n");
snd_pcm_hw_params_dump(params, out);
snd_output_printf(out, "REFINE (slave params):\n");
snd_pcm_hw_params_dump(sparams, out);
snd_output_close(out);
#endif
err = _snd_pcm_hw_params_refine(params, links, sparams);
#ifdef DEBUG_REFINE
snd_output_stdio_attach(&out, stderr, 0);
snd_output_printf(out, "********************\n");
snd_output_printf(out, "REFINE (params) (%i):\n", err);
snd_pcm_hw_params_dump(params, out);
snd_output_printf(out, "REFINE (slave params):\n");
snd_pcm_hw_params_dump(sparams, out);
snd_output_close(out);
#endif
if (err < 0)
return err;
return 0;