redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

Merge remote branch 'alsa/devel' into topic/misc

hifive-unleashed-5.1
Takashi Iwai 2010-10-20 12:22:11 +02:00
parent 83fc3bc095 5de9e45fcf
commit f3305da35a
1 changed files with 123 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

139
sound/drivers/aloop.c
View File

@ -39,6 +39,7 @@
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/info.h>
#include <sound/initval.h>
MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
@ -76,6 +77,7 @@ struct loopback_cable {
/* flags */
unsigned int valid;
unsigned int running;
unsigned int pause;
};
struct loopback_setup {
@ -184,6 +186,7 @@ static void loopback_timer_start(struct loopback_pcm *dpcm)
static inline void loopback_timer_stop(struct loopback_pcm *dpcm)
{
del_timer(&dpcm->timer);
dpcm->timer.expires = 0;
}
#define CABLE_VALID_PLAYBACK (1 << SNDRV_PCM_STREAM_PLAYBACK)
@ -252,7 +255,7 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
struct snd_pcm_runtime *runtime = substream->runtime;
struct loopback_pcm *dpcm = runtime->private_data;
struct loopback_cable *cable = dpcm->cable;
int err;
int err, stream = 1 << substream->stream;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
@ -261,17 +264,36 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd)
return err;
dpcm->last_jiffies = jiffies;
dpcm->pcm_rate_shift = 0;
spin_lock(&cable->lock);
cable->running |= stream;
cable->pause &= ~stream;
spin_unlock(&cable->lock);
loopback_timer_start(dpcm);
cable->running |= (1 << substream->stream);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
break;
case SNDRV_PCM_TRIGGER_STOP:
cable->running &= ~(1 << substream->stream);
spin_lock(&cable->lock);
cable->running &= ~stream;
cable->pause &= ~stream;
spin_unlock(&cable->lock);
loopback_timer_stop(dpcm);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
loopback_active_notify(dpcm);
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
spin_lock(&cable->lock);
cable->pause |= stream;
spin_unlock(&cable->lock);
loopback_timer_stop(dpcm);
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
spin_lock(&cable->lock);
dpcm->last_jiffies = jiffies;
cable->pause &= ~stream;
spin_unlock(&cable->lock);
loopback_timer_start(dpcm);
break;
default:
return -EINVAL;
}
@ -452,28 +474,30 @@ static void loopback_bytepos_update(struct loopback_pcm *dpcm,
}
}
static void loopback_pos_update(struct loopback_cable *cable)
static unsigned int loopback_pos_update(struct loopback_cable *cable)
{
struct loopback_pcm *dpcm_play =
cable->streams[SNDRV_PCM_STREAM_PLAYBACK];
struct loopback_pcm *dpcm_capt =
cable->streams[SNDRV_PCM_STREAM_CAPTURE];
unsigned long delta_play = 0, delta_capt = 0;
unsigned int running;
spin_lock(&cable->lock);
if (cable->running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) {
running = cable->running ^ cable->pause;
if (running & (1 << SNDRV_PCM_STREAM_PLAYBACK)) {
delta_play = jiffies - dpcm_play->last_jiffies;
dpcm_play->last_jiffies += delta_play;
}
if (cable->running & (1 << SNDRV_PCM_STREAM_CAPTURE)) {
if (running & (1 << SNDRV_PCM_STREAM_CAPTURE)) {
delta_capt = jiffies - dpcm_capt->last_jiffies;
dpcm_capt->last_jiffies += delta_capt;
}
if (delta_play == 0 && delta_capt == 0) {
spin_unlock(&cable->lock);
return;
return running;
}
if (delta_play > delta_capt) {
@ -488,27 +512,27 @@ static void loopback_pos_update(struct loopback_cable *cable)
if (delta_play == 0 && delta_capt == 0) {
spin_unlock(&cable->lock);
return;
return running;
}
/* note delta_capt == delta_play at this moment */
loopback_bytepos_update(dpcm_capt, delta_capt, BYTEPOS_UPDATE_COPY);
loopback_bytepos_update(dpcm_play, delta_play, BYTEPOS_UPDATE_POSONLY);
spin_unlock(&cable->lock);
return running;
}
static void loopback_timer_function(unsigned long data)
{
struct loopback_pcm *dpcm = (struct loopback_pcm *)data;
int stream;
unsigned int running;
loopback_pos_update(dpcm->cable);
stream = dpcm->substream->stream;
if (dpcm->cable->running & (1 << stream))
running = loopback_pos_update(dpcm->cable);
if (running & (1 << dpcm->substream->stream)) {
loopback_timer_start(dpcm);
if (dpcm->period_update_pending) {
dpcm->period_update_pending = 0;
if (dpcm->cable->running & (1 << stream))
if (dpcm->period_update_pending) {
dpcm->period_update_pending = 0;
snd_pcm_period_elapsed(dpcm->substream);
}
}
}
@ -524,7 +548,7 @@ static snd_pcm_uframes_t loopback_pointer(struct snd_pcm_substream *substream)
static struct snd_pcm_hardware loopback_pcm_hardware =
{
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP |
SNDRV_PCM_INFO_MMAP_VALID),
SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_PAUSE),
.formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE |
SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE),
@ -1011,6 +1035,87 @@ static int __devinit loopback_mixer_new(struct loopback *loopback, int notify)
return 0;
}
#ifdef CONFIG_PROC_FS
static void print_dpcm_info(struct snd_info_buffer *buffer,
struct loopback_pcm *dpcm,
const char *id)
{
snd_iprintf(buffer, " %s\n", id);
if (dpcm == NULL) {
snd_iprintf(buffer, " inactive\n");
return;
}
snd_iprintf(buffer, " buffer_size:\t%u\n", dpcm->pcm_buffer_size);
snd_iprintf(buffer, " buffer_pos:\t\t%u\n", dpcm->buf_pos);
snd_iprintf(buffer, " silent_size:\t%u\n", dpcm->silent_size);
snd_iprintf(buffer, " period_size:\t%u\n", dpcm->pcm_period_size);
snd_iprintf(buffer, " bytes_per_sec:\t%u\n", dpcm->pcm_bps);
snd_iprintf(buffer, " sample_align:\t%u\n", dpcm->pcm_salign);
snd_iprintf(buffer, " rate_shift:\t\t%u\n", dpcm->pcm_rate_shift);
snd_iprintf(buffer, " update_pending:\t%u\n",
dpcm->period_update_pending);
snd_iprintf(buffer, " irq_pos:\t\t%u\n", dpcm->irq_pos);
snd_iprintf(buffer, " period_frac:\t%u\n", dpcm->period_size_frac);
snd_iprintf(buffer, " last_jiffies:\t%lu (%lu)\n",
dpcm->last_jiffies, jiffies);
snd_iprintf(buffer, " timer_expires:\t%lu\n", dpcm->timer.expires);
}
static void print_substream_info(struct snd_info_buffer *buffer,
struct loopback *loopback,
int sub,
int num)
{
struct loopback_cable *cable = loopback->cables[sub][num];
snd_iprintf(buffer, "Cable %i substream %i:\n", num, sub);
if (cable == NULL) {
snd_iprintf(buffer, " inactive\n");
return;
}
snd_iprintf(buffer, " valid: %u\n", cable->valid);
snd_iprintf(buffer, " running: %u\n", cable->running);
snd_iprintf(buffer, " pause: %u\n", cable->pause);
print_dpcm_info(buffer, cable->streams[0], "Playback");
print_dpcm_info(buffer, cable->streams[1], "Capture");
}
static void print_cable_info(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
struct loopback *loopback = entry->private_data;
int sub, num;
mutex_lock(&loopback->cable_lock);
num = entry->name[strlen(entry->name)-1];
num = num == '0' ? 0 : 1;
for (sub = 0; sub < MAX_PCM_SUBSTREAMS; sub++)
print_substream_info(buffer, loopback, sub, num);
mutex_unlock(&loopback->cable_lock);
}
static int __devinit loopback_proc_new(struct loopback *loopback, int cidx)
{
char name[32];
struct snd_info_entry *entry;
int err;
snprintf(name, sizeof(name), "cable#%d", cidx);
err = snd_card_proc_new(loopback->card, name, &entry);
if (err < 0)
return err;
snd_info_set_text_ops(entry, loopback, print_cable_info);
return 0;
}
#else /* !CONFIG_PROC_FS */
#define loopback_proc_new(loopback, cidx) do { } while (0)
#endif
static int __devinit loopback_probe(struct platform_device *devptr)
{
struct snd_card *card;
@ -1041,6 +1146,8 @@ static int __devinit loopback_probe(struct platform_device *devptr)
err = loopback_mixer_new(loopback, pcm_notify[dev] ? 1 : 0);
if (err < 0)
goto __nodev;
loopback_proc_new(loopback, 0);
loopback_proc_new(loopback, 1);
strcpy(card->driver, "Loopback");
strcpy(card->shortname, "Loopback");
sprintf(card->longname, "Loopback %i", dev + 1);