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| author | Jaroslav Kysela <perex@perex.cz> | 2010-10-20 09:33:03 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2010-10-20 09:35:43 +0200 |
| commit | 5de9e45fcfccdf8151a82fc1a521e7042cbe482a (patch) | |
| tree | 2b11c4589947b68575fdbffc0252bf52a21db03f /sound/drivers/aloop.c | |
| parent | ALSA: snd-aloop - fix locking issues (running flag updates) (diff) | |
| download | linux-5de9e45fcfccdf8151a82fc1a521e7042cbe482a.tar.xz linux-5de9e45fcfccdf8151a82fc1a521e7042cbe482a.zip | |
ALSA: snd-aloop - add pause support
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'sound/drivers/aloop.c')
| -rw-r--r-- | sound/drivers/aloop.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/sound/drivers/aloop.c b/sound/drivers/aloop.c index 38e8351e935d..12b44b0b6777 100644 --- a/sound/drivers/aloop.c +++ b/sound/drivers/aloop.c @@ -77,6 +77,7 @@ struct loopback_cable { /* flags */ unsigned int valid; unsigned int running; + unsigned int pause; }; struct loopback_setup { @@ -254,7 +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: @@ -264,7 +265,8 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd) dpcm->last_jiffies = jiffies; dpcm->pcm_rate_shift = 0; spin_lock(&cable->lock); - cable->running |= (1 << substream->stream); + cable->running |= stream; + cable->pause &= ~stream; spin_unlock(&cable->lock); loopback_timer_start(dpcm); if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) @@ -272,12 +274,26 @@ static int loopback_trigger(struct snd_pcm_substream *substream, int cmd) break; case SNDRV_PCM_TRIGGER_STOP: spin_lock(&cable->lock); - cable->running &= ~(1 << substream->stream); + 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; } @@ -468,7 +484,7 @@ static unsigned int loopback_pos_update(struct loopback_cable *cable) unsigned int running; spin_lock(&cable->lock); - running = cable->running; + 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; @@ -532,7 +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), @@ -1060,6 +1076,7 @@ static void print_substream_info(struct snd_info_buffer *buffer, } 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"); } |