#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>");
/* flags */
unsigned int valid;
unsigned int running;
+ unsigned int pause;
};
struct loopback_setup {
dpcm->pcm_rate_shift = rate_shift;
dpcm->period_size_frac = frac_pos(dpcm, dpcm->pcm_period_size);
}
+ if (dpcm->period_size_frac <= dpcm->irq_pos) {
+ dpcm->irq_pos %= dpcm->period_size_frac;
+ dpcm->period_update_pending = 1;
+ }
tick = dpcm->period_size_frac - dpcm->irq_pos;
tick = (tick + dpcm->pcm_bps - 1) / dpcm->pcm_bps;
dpcm->timer.expires = jiffies + tick;
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)
static int loopback_check_format(struct loopback_cable *cable, int stream)
{
- struct snd_pcm_runtime *runtime;
+ struct snd_pcm_runtime *runtime, *cruntime;
struct loopback_setup *setup;
struct snd_card *card;
int check;
}
runtime = cable->streams[SNDRV_PCM_STREAM_PLAYBACK]->
substream->runtime;
- check = cable->hw.formats != (1ULL << runtime->format) ||
- cable->hw.rate_min != runtime->rate ||
- cable->hw.rate_max != runtime->rate ||
- cable->hw.channels_min != runtime->channels ||
- cable->hw.channels_max != runtime->channels;
+ cruntime = cable->streams[SNDRV_PCM_STREAM_CAPTURE]->
+ substream->runtime;
+ check = runtime->format != cruntime->format ||
+ runtime->rate != cruntime->rate ||
+ runtime->channels != cruntime->channels;
if (!check)
return 0;
if (stream == SNDRV_PCM_STREAM_CAPTURE) {
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:
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;
}
return 0;
}
+static void params_change_substream(struct loopback_pcm *dpcm,
+ struct snd_pcm_runtime *runtime)
+{
+ struct snd_pcm_runtime *dst_runtime;
+
+ if (dpcm == NULL || dpcm->substream == NULL)
+ return;
+ dst_runtime = dpcm->substream->runtime;
+ if (dst_runtime == NULL)
+ return;
+ dst_runtime->hw = dpcm->cable->hw;
+}
+
+static void params_change(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct loopback_pcm *dpcm = runtime->private_data;
+ struct loopback_cable *cable = dpcm->cable;
+
+ cable->hw.formats = (1ULL << runtime->format);
+ cable->hw.rate_min = runtime->rate;
+ cable->hw.rate_max = runtime->rate;
+ cable->hw.channels_min = runtime->channels;
+ cable->hw.channels_max = runtime->channels;
+ params_change_substream(cable->streams[SNDRV_PCM_STREAM_PLAYBACK],
+ runtime);
+ params_change_substream(cable->streams[SNDRV_PCM_STREAM_CAPTURE],
+ runtime);
+}
+
static int loopback_prepare(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct loopback_pcm *dpcm = runtime->private_data;
struct loopback_cable *cable = dpcm->cable;
- unsigned int bps, salign;
+ int bps, salign;
salign = (snd_pcm_format_width(runtime->format) *
runtime->channels) / 8;
dpcm->pcm_period_size = frames_to_bytes(runtime, runtime->period_size);
mutex_lock(&dpcm->loopback->cable_lock);
- if (!(cable->valid & ~(1 << substream->stream))) {
- cable->hw.formats = (1ULL << runtime->format);
- cable->hw.rate_min = runtime->rate;
- cable->hw.rate_max = runtime->rate;
- cable->hw.channels_min = runtime->channels;
- cable->hw.channels_max = runtime->channels;
- }
+ if (!(cable->valid & ~(1 << substream->stream)) ||
+ (get_setup(dpcm)->notify &&
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK))
+ params_change(substream);
cable->valid |= 1 << substream->stream;
mutex_unlock(&dpcm->loopback->cable_lock);
unsigned int bytes)
{
struct snd_pcm_runtime *runtime = play->substream->runtime;
- char *src = play->substream->runtime->dma_area;
+ char *src = runtime->dma_area;
char *dst = capt->substream->runtime->dma_area;
unsigned int src_off = play->buf_pos;
unsigned int dst_off = capt->buf_pos;
dst_off = (dst_off + size) % capt->pcm_buffer_size;
}
- if (clear_bytes > 0)
+ if (clear_bytes > 0) {
clear_capture_buf(capt, clear_bytes);
+ capt->silent_size = 0;
+ }
}
#define BYTEPOS_UPDATE_POSONLY 0
}
}
-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) {
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);
+ }
}
}
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),
.channels_max = 32,
.buffer_bytes_max = 2 * 1024 * 1024,
.period_bytes_min = 64,
- .period_bytes_max = 2 * 1024 * 1024,
+ /* note check overflow in frac_pos() using pcm_rate_shift before
+ changing period_bytes_max value */
+ .period_bytes_max = 1024 * 1024,
.periods_min = 1,
.periods_max = 1024,
.fifo_size = 0,
return !substream->stream;
}
+static int rule_format(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+
+ struct snd_pcm_hardware *hw = rule->private;
+ struct snd_mask *maskp = hw_param_mask(params, rule->var);
+
+ maskp->bits[0] &= (u_int32_t)hw->formats;
+ maskp->bits[1] &= (u_int32_t)(hw->formats >> 32);
+ memset(maskp->bits + 2, 0, (SNDRV_MASK_MAX-64) / 8); /* clear rest */
+ if (! maskp->bits[0] && ! maskp->bits[1])
+ return -EINVAL;
+ return 0;
+}
+
+static int rule_rate(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_pcm_hardware *hw = rule->private;
+ struct snd_interval t;
+
+ t.min = hw->rate_min;
+ t.max = hw->rate_max;
+ t.openmin = t.openmax = 0;
+ t.integer = 0;
+ return snd_interval_refine(hw_param_interval(params, rule->var), &t);
+}
+
+static int rule_channels(struct snd_pcm_hw_params *params,
+ struct snd_pcm_hw_rule *rule)
+{
+ struct snd_pcm_hardware *hw = rule->private;
+ struct snd_interval t;
+
+ t.min = hw->channels_min;
+ t.max = hw->channels_max;
+ t.openmin = t.openmax = 0;
+ t.integer = 0;
+ return snd_interval_refine(hw_param_interval(params, rule->var), &t);
+}
+
static int loopback_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
+ /* use dynamic rules based on actual runtime->hw values */
+ /* note that the default rules created in the PCM midlevel code */
+ /* are cached -> they do not reflect the actual state */
+ err = snd_pcm_hw_rule_add(runtime, 0,
+ SNDRV_PCM_HW_PARAM_FORMAT,
+ rule_format, &runtime->hw,
+ SNDRV_PCM_HW_PARAM_FORMAT, -1);
+ if (err < 0)
+ goto unlock;
+ err = snd_pcm_hw_rule_add(runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ rule_rate, &runtime->hw,
+ SNDRV_PCM_HW_PARAM_RATE, -1);
+ if (err < 0)
+ goto unlock;
+ err = snd_pcm_hw_rule_add(runtime, 0,
+ SNDRV_PCM_HW_PARAM_CHANNELS,
+ rule_channels, &runtime->hw,
+ SNDRV_PCM_HW_PARAM_CHANNELS, -1);
+ if (err < 0)
+ goto unlock;
+
runtime->private_data = dpcm;
runtime->private_free = loopback_runtime_free;
- if (get_notify(dpcm) &&
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ if (get_notify(dpcm))
runtime->hw = loopback_pcm_hardware;
- } else {
+ else
runtime->hw = cable->hw;
- }
unlock:
mutex_unlock(&loopback->cable_lock);
return err;
{
struct loopback *loopback = snd_kcontrol_chip(kcontrol);
struct loopback_cable *cable = loopback->cables
- [kcontrol->id.subdevice][kcontrol->id.device];
+ [kcontrol->id.subdevice][kcontrol->id.device ^ 1];
unsigned int val = 0;
if (cable != NULL)
ucontrol->value.integer.value[0] =
loopback->setup[kcontrol->id.subdevice]
- [kcontrol->id.device].rate;
+ [kcontrol->id.device].channels;
return 0;
}
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;
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);
git://bbs.cooldavid.org / net-next-2.6.git / blobdiff