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Check timer protocol number for direct plugins

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Check timer protocol number before enabling TREAD mode for direct plugins.
This commit is contained in:
Takashi Iwai 2005-04-14 15:29:06 +00:00
parent ca67f32848
commit bdabcb9679
1 changed files with 30 additions and 10 deletions
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40
src/pcm/pcm_direct.c
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@ -849,6 +849,7 @@ int snd_pcm_direct_initialize_poll_fd(snd_pcm_direct_t *dmix)
snd_pcm_info_t *info;
snd_timer_params_t *params;
char name[128];
int tread = 0;
struct pollfd fd;
int capture = dmix->type == SND_PCM_TYPE_DSNOOP ? 1 : 0;
@ -864,26 +865,45 @@ int snd_pcm_direct_initialize_poll_fd(snd_pcm_direct_t *dmix)
snd_pcm_info_get_card(info),
snd_pcm_info_get_device(info),
snd_pcm_info_get_subdevice(info) * 2 + capture);
ret = snd_timer_open(&dmix->timer, name, SND_TIMER_OPEN_NONBLOCK | SND_TIMER_OPEN_TREAD);
ret = snd_timer_open(&dmix->timer, name, SND_TIMER_OPEN_NONBLOCK
/*| SND_TIMER_OPEN_TREAD*/); /* XXX: TREAD is set later */
if (ret < 0) {
SNDERR("unable to open timer '%s'", name);
return ret;
}
snd_timer_params_set_auto_start(params, 1);
snd_timer_params_set_early_event(params, 1);
snd_timer_params_set_ticks(params, 1);
snd_timer_params_set_filter(params, (1<<SND_TIMER_EVENT_TICK)|(1<<SND_TIMER_EVENT_MPAUSE));
ret = snd_timer_params(dmix->timer, params);
if (ret < 0) {
SNDERR("unable to set timer parameters", name);
return ret;
}
if (snd_timer_poll_descriptors_count(dmix->timer) != 1) {
SNDERR("unable to use timer with fd more than one!!!", name);
return ret;
}
snd_timer_poll_descriptors(dmix->timer, &fd, 1);
dmix->poll_fd = fd.fd;
/*
* A hack to avoid Oops in the older kernel
*
* Enable TREAD mode only when protocl is newer than 2.0.2.
*/
{
int ver = 0;
ioctl(dmix->poll_fd, SNDRV_TIMER_IOCTL_PVERSION, &ver);
if (ver >= SNDRV_PROTOCOL_VERSION(2, 0, 3)) {
tread = 1;
if (ioctl(dmix->poll_fd, SNDRV_TIMER_IOCTL_TREAD, &tread) < 0)
tread = 0;
}
}
snd_timer_params_set_auto_start(params, 1);
snd_timer_params_set_early_event(params, 1);
snd_timer_params_set_ticks(params, 1);
if (tread)
snd_timer_params_set_filter(params, (1<<SND_TIMER_EVENT_TICK)|(1<<SND_TIMER_EVENT_MPAUSE));
ret = snd_timer_params(dmix->timer, params);
if (ret < 0) {
SNDERR("unable to set timer parameters", name);
return ret;
}
return 0;
}