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dmix - Enable auto format detection as default

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The direct plugins have the automatic format-detection feature but it
wasn't enabled properly in the interface.  Now you can pass the format
"unchanged" to make the plugin detect a proper format.

This will change the default format of some drivers, such as, HD-audio.
This commit is contained in:
Takashi Iwai 2008-01-18 13:42:51 +01:00
parent 91fc64cefb
commit 35d4f9b8d7
3 changed files with 11 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/conf/alsa.conf
View file

@ -68,7 +68,7 @@ defaults.pcm.ipc_gid audio
defaults.pcm.ipc_perm 0660
defaults.pcm.dmix.max_periods 0
defaults.pcm.dmix.rate 48000
defaults.pcm.dmix.format S16_LE
defaults.pcm.dmix.format "unchanged"
defaults.pcm.dmix.card defaults.pcm.card
defaults.pcm.dmix.device defaults.pcm.device
defaults.pcm.dsnoop.card defaults.pcm.card

6
src/pcm/pcm_direct.c
View file

@ -874,7 +874,11 @@ int snd_pcm_direct_initialize_slave(snd_pcm_direct_t *dmix, snd_pcm_t *spcm, str
return ret;
}
}
ret = snd_pcm_hw_params_set_format(spcm, hw_params, params->format);
if (params->format == SND_PCM_FORMAT_UNKNOWN)
ret = -EINVAL;
else
ret = snd_pcm_hw_params_set_format(spcm, hw_params,
params->format);
if (ret < 0) {
static const snd_pcm_format_t dmix_formats[] = {
SND_PCM_FORMAT_S32,

8
src/pcm/pcm_dmix.c
View file

@ -1267,7 +1267,7 @@ int _snd_pcm_dmix_open(snd_pcm_t **pcmp, const char *name,
params.periods = 3;
err = snd_pcm_slave_conf(root, dopen.slave, &sconf, 8,
SND_PCM_HW_PARAM_FORMAT, 0, &params.format,
SND_PCM_HW_PARAM_FORMAT, SCONF_UNCHANGED, &params.format,
SND_PCM_HW_PARAM_RATE, 0, &params.rate,
SND_PCM_HW_PARAM_CHANNELS, 0, &params.channels,
SND_PCM_HW_PARAM_PERIOD_TIME, 0, &params.period_time,
@ -1282,8 +1282,10 @@ int _snd_pcm_dmix_open(snd_pcm_t **pcmp, const char *name,
if (psize == -1 && params.period_time == -1)
params.period_time = 125000; /* 0.125 seconds */
/* sorry, limited features */
if (! (dmix_supported_format & (1ULL << params.format))) {
if (params.format == -2)
params.format = SND_PCM_FORMAT_UNKNOWN;
else if (!(dmix_supported_format & (1ULL << params.format))) {
/* sorry, limited features */
SNDERR("Unsupported format");
snd_config_delete(sconf);
return -EINVAL;