diff options
| -rw-r--r-- | sound/drivers/aloop.c | 139 |
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); |