freebsd-skq/sys/dev/sound/usb/uaudio_pcm.c
Hans Petter Selasky 85bad58226 The synchronisation value returned by the so-called feedback endpoint
appears to be too inaccurate that it can be used to synchronize the
playback data stream. If there is a recording endpoint associated with
the playback endpoint, use that instead. That means if the isochronous
OUT endpoint is asynchronus the USB audio driver will automatically
start recording, if possible, to get exact information about the
needed sample rate adjustments. In no recording endpoint is present,
no rate adaption will be done.

While at it fix an issue where the hardware buffer pointers don't get
reset at the first device PCM trigger.

Make some variables 32-bit to avoid problems with multithreading.

MFC after:	3 days
PR: 		198444
2015-03-21 09:45:45 +00:00

243 lines
5.9 KiB
C

/* $FreeBSD$ */
/*-
* Copyright (c) 2000-2002 Hiroyuki Aizu <aizu@navi.org>
* Copyright (c) 2006 Hans Petter Selasky
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_snd.h"
#endif
#include <dev/sound/pcm/sound.h>
#include <dev/sound/chip.h>
#include <dev/sound/usb/uaudio.h>
#include "mixer_if.h"
/************************************************************/
static void *
ua_chan_init(kobj_t obj, void *devinfo, struct snd_dbuf *b, struct pcm_channel *c, int dir)
{
return (uaudio_chan_init(devinfo, b, c, dir));
}
static int
ua_chan_free(kobj_t obj, void *data)
{
return (uaudio_chan_free(data));
}
static int
ua_chan_setformat(kobj_t obj, void *data, uint32_t format)
{
/*
* At this point, no need to query as we
* shouldn't select an unsorted format
*/
return (uaudio_chan_set_param_format(data, format));
}
static uint32_t
ua_chan_setspeed(kobj_t obj, void *data, uint32_t speed)
{
return (uaudio_chan_set_param_speed(data, speed));
}
static uint32_t
ua_chan_setblocksize(kobj_t obj, void *data, uint32_t blocksize)
{
return (uaudio_chan_set_param_blocksize(data, blocksize));
}
static int
ua_chan_setfragments(kobj_t obj, void *data, uint32_t blocksize, uint32_t blockcount)
{
return (uaudio_chan_set_param_fragments(data, blocksize, blockcount));
}
static int
ua_chan_trigger(kobj_t obj, void *data, int go)
{
if (PCMTRIG_COMMON(go)) {
if (go == PCMTRIG_START) {
uaudio_chan_start(data);
} else {
uaudio_chan_stop(data);
}
}
return (0);
}
static uint32_t
ua_chan_getptr(kobj_t obj, void *data)
{
return (uaudio_chan_getptr(data));
}
static struct pcmchan_caps *
ua_chan_getcaps(kobj_t obj, void *data)
{
return (uaudio_chan_getcaps(data));
}
static struct pcmchan_matrix *
ua_chan_getmatrix(kobj_t obj, void *data, uint32_t format)
{
return (uaudio_chan_getmatrix(data, format));
}
static kobj_method_t ua_chan_methods[] = {
KOBJMETHOD(channel_init, ua_chan_init),
KOBJMETHOD(channel_free, ua_chan_free),
KOBJMETHOD(channel_setformat, ua_chan_setformat),
KOBJMETHOD(channel_setspeed, ua_chan_setspeed),
KOBJMETHOD(channel_setblocksize, ua_chan_setblocksize),
KOBJMETHOD(channel_setfragments, ua_chan_setfragments),
KOBJMETHOD(channel_trigger, ua_chan_trigger),
KOBJMETHOD(channel_getptr, ua_chan_getptr),
KOBJMETHOD(channel_getcaps, ua_chan_getcaps),
KOBJMETHOD(channel_getmatrix, ua_chan_getmatrix),
KOBJMETHOD_END
};
CHANNEL_DECLARE(ua_chan);
/************************************************************/
static int
ua_mixer_init(struct snd_mixer *m)
{
return (uaudio_mixer_init_sub(mix_getdevinfo(m), m));
}
static int
ua_mixer_set(struct snd_mixer *m, unsigned type, unsigned left, unsigned right)
{
struct mtx *mtx = mixer_get_lock(m);
uint8_t do_unlock;
if (mtx_owned(mtx)) {
do_unlock = 0;
} else {
do_unlock = 1;
mtx_lock(mtx);
}
uaudio_mixer_set(mix_getdevinfo(m), type, left, right);
if (do_unlock) {
mtx_unlock(mtx);
}
return (left | (right << 8));
}
static uint32_t
ua_mixer_setrecsrc(struct snd_mixer *m, uint32_t src)
{
struct mtx *mtx = mixer_get_lock(m);
int retval;
uint8_t do_unlock;
if (mtx_owned(mtx)) {
do_unlock = 0;
} else {
do_unlock = 1;
mtx_lock(mtx);
}
retval = uaudio_mixer_setrecsrc(mix_getdevinfo(m), src);
if (do_unlock) {
mtx_unlock(mtx);
}
return (retval);
}
static int
ua_mixer_uninit(struct snd_mixer *m)
{
return (uaudio_mixer_uninit_sub(mix_getdevinfo(m)));
}
static kobj_method_t ua_mixer_methods[] = {
KOBJMETHOD(mixer_init, ua_mixer_init),
KOBJMETHOD(mixer_uninit, ua_mixer_uninit),
KOBJMETHOD(mixer_set, ua_mixer_set),
KOBJMETHOD(mixer_setrecsrc, ua_mixer_setrecsrc),
KOBJMETHOD_END
};
MIXER_DECLARE(ua_mixer);
/************************************************************/
static int
ua_probe(device_t dev)
{
struct sndcard_func *func;
/* the parent device has already been probed */
func = device_get_ivars(dev);
if ((func == NULL) ||
(func->func != SCF_PCM)) {
return (ENXIO);
}
device_set_desc(dev, "USB audio");
return (BUS_PROBE_DEFAULT);
}
static int
ua_attach(device_t dev)
{
return (uaudio_attach_sub(dev, &ua_mixer_class, &ua_chan_class));
}
static int
ua_detach(device_t dev)
{
return (uaudio_detach_sub(dev));
}
/************************************************************/
static device_method_t ua_pcm_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ua_probe),
DEVMETHOD(device_attach, ua_attach),
DEVMETHOD(device_detach, ua_detach),
DEVMETHOD_END
};
static driver_t ua_pcm_driver = {
"pcm",
ua_pcm_methods,
PCM_SOFTC_SIZE,
};
DRIVER_MODULE(ua_pcm, uaudio, ua_pcm_driver, pcm_devclass, 0, 0);
MODULE_DEPEND(ua_pcm, uaudio, 1, 1, 1);
MODULE_DEPEND(ua_pcm, sound, SOUND_MINVER, SOUND_PREFVER, SOUND_MAXVER);
MODULE_VERSION(ua_pcm, 1);