mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 21:29:49 +07:00
09e56df8b3
Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: Takashi Iwai <tiwai@suse.de>
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*
|
|
* Digital Audio (PCM) abstract layer
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
|
|
*
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
#include <linux/time.h>
|
|
#include <linux/gcd.h>
|
|
#include <sound/core.h>
|
|
#include <sound/pcm.h>
|
|
#include <sound/timer.h>
|
|
|
|
/*
|
|
* Timer functions
|
|
*/
|
|
|
|
void snd_pcm_timer_resolution_change(struct snd_pcm_substream *substream)
|
|
{
|
|
unsigned long rate, mult, fsize, l, post;
|
|
struct snd_pcm_runtime *runtime = substream->runtime;
|
|
|
|
mult = 1000000000;
|
|
rate = runtime->rate;
|
|
if (snd_BUG_ON(!rate))
|
|
return;
|
|
l = gcd(mult, rate);
|
|
mult /= l;
|
|
rate /= l;
|
|
fsize = runtime->period_size;
|
|
if (snd_BUG_ON(!fsize))
|
|
return;
|
|
l = gcd(rate, fsize);
|
|
rate /= l;
|
|
fsize /= l;
|
|
post = 1;
|
|
while ((mult * fsize) / fsize != mult) {
|
|
mult /= 2;
|
|
post *= 2;
|
|
}
|
|
if (rate == 0) {
|
|
pcm_err(substream->pcm,
|
|
"pcm timer resolution out of range (rate = %u, period_size = %lu)\n",
|
|
runtime->rate, runtime->period_size);
|
|
runtime->timer_resolution = -1;
|
|
return;
|
|
}
|
|
runtime->timer_resolution = (mult * fsize / rate) * post;
|
|
}
|
|
|
|
static unsigned long snd_pcm_timer_resolution(struct snd_timer * timer)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
|
|
substream = timer->private_data;
|
|
return substream->runtime ? substream->runtime->timer_resolution : 0;
|
|
}
|
|
|
|
static int snd_pcm_timer_start(struct snd_timer * timer)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
|
|
substream = snd_timer_chip(timer);
|
|
substream->timer_running = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int snd_pcm_timer_stop(struct snd_timer * timer)
|
|
{
|
|
struct snd_pcm_substream *substream;
|
|
|
|
substream = snd_timer_chip(timer);
|
|
substream->timer_running = 0;
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_timer_hardware snd_pcm_timer =
|
|
{
|
|
.flags = SNDRV_TIMER_HW_AUTO | SNDRV_TIMER_HW_SLAVE,
|
|
.resolution = 0,
|
|
.ticks = 1,
|
|
.c_resolution = snd_pcm_timer_resolution,
|
|
.start = snd_pcm_timer_start,
|
|
.stop = snd_pcm_timer_stop,
|
|
};
|
|
|
|
/*
|
|
* Init functions
|
|
*/
|
|
|
|
static void snd_pcm_timer_free(struct snd_timer *timer)
|
|
{
|
|
struct snd_pcm_substream *substream = timer->private_data;
|
|
substream->timer = NULL;
|
|
}
|
|
|
|
void snd_pcm_timer_init(struct snd_pcm_substream *substream)
|
|
{
|
|
struct snd_timer_id tid;
|
|
struct snd_timer *timer;
|
|
|
|
tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
|
|
tid.dev_class = SNDRV_TIMER_CLASS_PCM;
|
|
tid.card = substream->pcm->card->number;
|
|
tid.device = substream->pcm->device;
|
|
tid.subdevice = (substream->number << 1) | (substream->stream & 1);
|
|
if (snd_timer_new(substream->pcm->card, "PCM", &tid, &timer) < 0)
|
|
return;
|
|
sprintf(timer->name, "PCM %s %i-%i-%i",
|
|
substream->stream == SNDRV_PCM_STREAM_CAPTURE ?
|
|
"capture" : "playback",
|
|
tid.card, tid.device, tid.subdevice);
|
|
timer->hw = snd_pcm_timer;
|
|
if (snd_device_register(timer->card, timer) < 0) {
|
|
snd_device_free(timer->card, timer);
|
|
return;
|
|
}
|
|
timer->private_data = substream;
|
|
timer->private_free = snd_pcm_timer_free;
|
|
substream->timer = timer;
|
|
}
|
|
|
|
void snd_pcm_timer_done(struct snd_pcm_substream *substream)
|
|
{
|
|
if (substream->timer) {
|
|
snd_device_free(substream->pcm->card, substream->timer);
|
|
substream->timer = NULL;
|
|
}
|
|
}
|