alsa: poll mode handling
Signed-off-by: malc <av1474@comtv.ru>
This commit is contained in:
malc
parent
dd8a56494d
commit
8b438ba3f5
@ -23,6 +23,7 @@
|
||||
*/
|
||||
#include <alsa/asoundlib.h>
|
||||
#include "qemu-common.h"
|
||||
#include "qemu-char.h"
|
||||
#include "audio.h"
|
||||
|
||||
#if QEMU_GNUC_PREREQ(4, 3)
|
||||
@ -32,16 +33,24 @@
|
||||
#define AUDIO_CAP "alsa"
|
||||
#include "audio_int.h"
|
||||
|
||||
struct pollhlp {
|
||||
snd_pcm_t *handle;
|
||||
struct pollfd *pfds;
|
||||
int count;
|
||||
};
|
||||
|
||||
typedef struct ALSAVoiceOut {
|
||||
HWVoiceOut hw;
|
||||
void *pcm_buf;
|
||||
snd_pcm_t *handle;
|
||||
struct pollhlp pollhlp;
|
||||
} ALSAVoiceOut;
|
||||
|
||||
typedef struct ALSAVoiceIn {
|
||||
HWVoiceIn hw;
|
||||
snd_pcm_t *handle;
|
||||
void *pcm_buf;
|
||||
struct pollhlp pollhlp;
|
||||
} ALSAVoiceIn;
|
||||
|
||||
static struct {
|
||||
@ -123,6 +132,156 @@ static void alsa_anal_close (snd_pcm_t **handlep)
|
||||
*handlep = NULL;
|
||||
}
|
||||
|
||||
static int alsa_recover (snd_pcm_t *handle)
|
||||
{
|
||||
int err = snd_pcm_prepare (handle);
|
||||
if (err < 0) {
|
||||
alsa_logerr (err, "Failed to prepare handle %p\n", handle);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int alsa_resume (snd_pcm_t *handle)
|
||||
{
|
||||
int err = snd_pcm_resume (handle);
|
||||
if (err < 0) {
|
||||
alsa_logerr (err, "Failed to resume handle %p\n", handle);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void alsa_poll_handler (void *opaque)
|
||||
{
|
||||
int err, count;
|
||||
snd_pcm_state_t state;
|
||||
struct pollhlp *hlp = opaque;
|
||||
unsigned short revents;
|
||||
|
||||
count = poll (hlp->pfds, hlp->count, 0);
|
||||
if (count < 0) {
|
||||
dolog ("alsa_poll_handler: poll %s\n", strerror (errno));
|
||||
return;
|
||||
}
|
||||
|
||||
if (!count) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* XXX: ALSA example uses initial count, not the one returned by
|
||||
poll, correct? */
|
||||
err = snd_pcm_poll_descriptors_revents (hlp->handle, hlp->pfds,
|
||||
hlp->count, &revents);
|
||||
if (err < 0) {
|
||||
alsa_logerr (err, "snd_pcm_poll_descriptors_revents");
|
||||
return;
|
||||
}
|
||||
|
||||
if (!(revents & POLLOUT)) {
|
||||
if (conf.verbose) {
|
||||
dolog ("revents = %d\n", revents);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
state = snd_pcm_state (hlp->handle);
|
||||
switch (state) {
|
||||
case SND_PCM_STATE_XRUN:
|
||||
alsa_recover (hlp->handle);
|
||||
break;
|
||||
|
||||
case SND_PCM_STATE_SUSPENDED:
|
||||
alsa_resume (hlp->handle);
|
||||
break;
|
||||
|
||||
case SND_PCM_STATE_PREPARED:
|
||||
audio_run ("alsa run (prepared)");
|
||||
break;
|
||||
|
||||
case SND_PCM_STATE_RUNNING:
|
||||
audio_run ("alsa run (running)");
|
||||
break;
|
||||
|
||||
default:
|
||||
dolog ("Unexpected state %d\n", state);
|
||||
}
|
||||
}
|
||||
|
||||
static int alsa_poll_helper (snd_pcm_t *handle, struct pollhlp *hlp)
|
||||
{
|
||||
int i, count, err;
|
||||
struct pollfd *pfds;
|
||||
|
||||
count = snd_pcm_poll_descriptors_count (handle);
|
||||
if (count <= 0) {
|
||||
dolog ("Could not initialize poll mode\n"
|
||||
"Invalid number of poll descriptors %d\n", count);
|
||||
return -1;
|
||||
}
|
||||
|
||||
pfds = audio_calloc ("alsa_poll_helper", count, sizeof (*pfds));
|
||||
if (!pfds) {
|
||||
dolog ("Could not initialize poll mode\n");
|
||||
return -1;
|
||||
}
|
||||
|
||||
err = snd_pcm_poll_descriptors (handle, pfds, count);
|
||||
if (err < 0) {
|
||||
alsa_logerr (err, "Could not initialize poll mode\n"
|
||||
"Could not obtain poll descriptors\n");
|
||||
qemu_free (pfds);
|
||||
return -1;
|
||||
}
|
||||
|
||||
for (i = 0; i < count; ++i) {
|
||||
if (pfds[i].events & POLLIN) {
|
||||
err = qemu_set_fd_handler (pfds[i].fd, alsa_poll_handler,
|
||||
NULL, hlp);
|
||||
}
|
||||
if (pfds[i].events & POLLOUT) {
|
||||
if (conf.verbose) {
|
||||
dolog ("POLLOUT %d %d\n", i, pfds[i].fd);
|
||||
}
|
||||
err = qemu_set_fd_handler (pfds[i].fd, NULL,
|
||||
alsa_poll_handler, hlp);
|
||||
}
|
||||
if (conf.verbose) {
|
||||
dolog ("Set handler events=%#x index=%d fd=%d err=%d\n",
|
||||
pfds[i].events, i, pfds[i].fd, err);
|
||||
}
|
||||
|
||||
if (err) {
|
||||
dolog ("Failed to set handler events=%#x index=%d fd=%d err=%d\n",
|
||||
pfds[i].events, i, pfds[i].fd, err);
|
||||
|
||||
while (i--) {
|
||||
qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL);
|
||||
}
|
||||
qemu_free (pfds);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
hlp->pfds = pfds;
|
||||
hlp->count = count;
|
||||
hlp->handle = handle;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int alsa_poll_out (HWVoiceOut *hw)
|
||||
{
|
||||
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
|
||||
|
||||
return alsa_poll_helper (alsa->handle, &alsa->pollhlp);
|
||||
}
|
||||
|
||||
static int alsa_poll_in (HWVoiceIn *hw)
|
||||
{
|
||||
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
|
||||
|
||||
return alsa_poll_helper (alsa->handle, &alsa->pollhlp);
|
||||
}
|
||||
|
||||
static int alsa_write (SWVoiceOut *sw, void *buf, int len)
|
||||
{
|
||||
return audio_pcm_sw_write (sw, buf, len);
|
||||
@ -493,26 +652,6 @@ static int alsa_open (int in, struct alsa_params_req *req,
|
||||
return -1;
|
||||
}
|
||||
|
||||
static int alsa_recover (snd_pcm_t *handle)
|
||||
{
|
||||
int err = snd_pcm_prepare (handle);
|
||||
if (err < 0) {
|
||||
alsa_logerr (err, "Failed to prepare handle %p\n", handle);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int alsa_resume (snd_pcm_t *handle)
|
||||
{
|
||||
int err = snd_pcm_resume (handle);
|
||||
if (err < 0) {
|
||||
alsa_logerr (err, "Failed to resume handle %p\n", handle);
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static snd_pcm_sframes_t alsa_get_avail (snd_pcm_t *handle)
|
||||
{
|
||||
snd_pcm_sframes_t avail;
|
||||
@ -626,6 +765,22 @@ static int alsa_run_out (HWVoiceOut *hw)
|
||||
return decr;
|
||||
}
|
||||
|
||||
static void alsa_fini_poll (struct pollhlp *hlp)
|
||||
{
|
||||
int i;
|
||||
struct pollfd *pfds = hlp->pfds;
|
||||
|
||||
if (pfds) {
|
||||
for (i = 0; i < hlp->count; ++i) {
|
||||
qemu_set_fd_handler (pfds[i].fd, NULL, NULL, NULL);
|
||||
}
|
||||
qemu_free (pfds);
|
||||
}
|
||||
hlp->pfds = NULL;
|
||||
hlp->count = 0;
|
||||
hlp->handle = NULL;
|
||||
}
|
||||
|
||||
static void alsa_fini_out (HWVoiceOut *hw)
|
||||
{
|
||||
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
|
||||
@ -637,6 +792,8 @@ static void alsa_fini_out (HWVoiceOut *hw)
|
||||
qemu_free (alsa->pcm_buf);
|
||||
alsa->pcm_buf = NULL;
|
||||
}
|
||||
|
||||
alsa_fini_poll (&alsa->pollhlp);
|
||||
}
|
||||
|
||||
static int alsa_init_out (HWVoiceOut *hw, struct audsettings *as)
|
||||
@ -705,11 +862,21 @@ static int alsa_voice_ctl (snd_pcm_t *handle, const char *typ, int pause)
|
||||
|
||||
static int alsa_ctl_out (HWVoiceOut *hw, int cmd, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int poll_mode;
|
||||
ALSAVoiceOut *alsa = (ALSAVoiceOut *) hw;
|
||||
|
||||
va_start (ap, cmd);
|
||||
poll_mode = va_arg (ap, int);
|
||||
va_end (ap);
|
||||
|
||||
switch (cmd) {
|
||||
case VOICE_ENABLE:
|
||||
ldebug ("enabling voice\n");
|
||||
if (poll_mode && alsa_poll_out (hw)) {
|
||||
poll_mode = 0;
|
||||
}
|
||||
hw->poll_mode = poll_mode;
|
||||
return alsa_voice_ctl (alsa->handle, "playback", 0);
|
||||
|
||||
case VOICE_DISABLE:
|
||||
@ -772,6 +939,7 @@ static void alsa_fini_in (HWVoiceIn *hw)
|
||||
qemu_free (alsa->pcm_buf);
|
||||
alsa->pcm_buf = NULL;
|
||||
}
|
||||
alsa_fini_poll (&alsa->pollhlp);
|
||||
}
|
||||
|
||||
static int alsa_run_in (HWVoiceIn *hw)
|
||||
@ -909,15 +1077,30 @@ static int alsa_read (SWVoiceIn *sw, void *buf, int size)
|
||||
|
||||
static int alsa_ctl_in (HWVoiceIn *hw, int cmd, ...)
|
||||
{
|
||||
va_list ap;
|
||||
int poll_mode;
|
||||
ALSAVoiceIn *alsa = (ALSAVoiceIn *) hw;
|
||||
|
||||
va_start (ap, cmd);
|
||||
poll_mode = va_arg (ap, int);
|
||||
va_end (ap);
|
||||
|
||||
switch (cmd) {
|
||||
case VOICE_ENABLE:
|
||||
ldebug ("enabling voice\n");
|
||||
if (poll_mode && alsa_poll_in (hw)) {
|
||||
poll_mode = 0;
|
||||
}
|
||||
hw->poll_mode = poll_mode;
|
||||
|
||||
return alsa_voice_ctl (alsa->handle, "capture", 0);
|
||||
|
||||
case VOICE_DISABLE:
|
||||
ldebug ("disabling voice\n");
|
||||
if (hw->poll_mode) {
|
||||
hw->poll_mode = 0;
|
||||
alsa_fini_poll (&alsa->pollhlp);
|
||||
}
|
||||
return alsa_voice_ctl (alsa->handle, "capture", 1);
|
||||
}
|
||||
|
||||
@ -1014,7 +1197,7 @@ static struct audio_pcm_ops alsa_pcm_ops = {
|
||||
.fini_in = alsa_fini_in,
|
||||
.run_in = alsa_run_in,
|
||||
.read = alsa_read,
|
||||
.ctl_in = alsa_ctl_in
|
||||
.ctl_in = alsa_ctl_in,
|
||||
};
|
||||
|
||||
struct audio_driver alsa_audio_driver = {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user