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authorTakashi Iwai <tiwai@suse.de>2010-10-20 12:22:11 +0200
committerTakashi Iwai <tiwai@suse.de>2010-10-20 12:22:11 +0200
commitf3305da35a26def93b476051f4d7b6bc791e561e (patch)
tree98dd3c78737a6cee8613b79772c000f0098e4f4a /sound/drivers
parent83fc3bc09518d42e8f5073e2a65884701dfadf19 (diff)
parent5de9e45fcfccdf8151a82fc1a521e7042cbe482a (diff)
downloadvexpress-lsk-f3305da35a26def93b476051f4d7b6bc791e561e.tar.gz
Merge remote branch 'alsa/devel' into topic/misc
Diffstat (limited to 'sound/drivers')
-rw-r--r--sound/drivers/aloop.c139
1 files changed, 123 insertions, 16 deletions
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c
index 838ad86311b..12b44b0b677 100644
--- a/sound/drivers/aloop.c
+++ b/sound/drivers/aloop.c
@@ -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);