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| author | Clemens Ladisch <clemens@ladisch.de> | 2006-10-04 13:42:57 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2007-02-09 09:00:02 +0100 |
| commit | e4f8e656d8c152c08cd44d0e3c21f009fab09952 (patch) | |
| tree | 09985324ca92cf1e4889fe2626833d4aae1e1ca5 /sound/usb | |
| parent | 1700f3080d98323e91864d67cb9f6d46f818ccf0 (diff) | |
| download | linux-3.10-e4f8e656d8c152c08cd44d0e3c21f009fab09952.tar.gz linux-3.10-e4f8e656d8c152c08cd44d0e3c21f009fab09952.tar.bz2 linux-3.10-e4f8e656d8c152c08cd44d0e3c21f009fab09952.zip | |
[ALSA] usb-audio: allow pausing
Add pause capabilities for both USB playback and capture streams.
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/usbaudio.c | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c index 478e504f702..d2e066dc5d8 100644 --- a/sound/usb/usbaudio.c +++ b/sound/usb/usbaudio.c @@ -391,6 +391,16 @@ static int retire_capture_urb(struct snd_usb_substream *subs, return 0; } +/* + * Process after capture complete when paused. Nothing to do. + */ +static int retire_paused_capture_urb(struct snd_usb_substream *subs, + struct snd_pcm_runtime *runtime, + struct urb *urb) +{ + return 0; +} + /* * prepare urb for full speed playback sync pipe @@ -493,13 +503,13 @@ static int snd_usb_audio_next_packet_size(struct snd_usb_substream *subs) } /* - * Prepare urb for streaming before playback starts. + * Prepare urb for streaming before playback starts or when paused. * - * We don't yet have data, so we send a frame of silence. + * We don't have any data, so we send a frame of silence. */ -static int prepare_startup_playback_urb(struct snd_usb_substream *subs, - struct snd_pcm_runtime *runtime, - struct urb *urb) +static int prepare_nodata_playback_urb(struct snd_usb_substream *subs, + struct snd_pcm_runtime *runtime, + struct urb *urb) { unsigned int i, offs, counts; struct snd_urb_ctx *ctx = urb->context; @@ -622,7 +632,7 @@ static int retire_playback_urb(struct snd_usb_substream *subs, */ static struct snd_urb_ops audio_urb_ops[2] = { { - .prepare = prepare_startup_playback_urb, + .prepare = prepare_nodata_playback_urb, .retire = retire_playback_urb, .prepare_sync = prepare_playback_sync_urb, .retire_sync = retire_playback_sync_urb, @@ -637,7 +647,7 @@ static struct snd_urb_ops audio_urb_ops[2] = { static struct snd_urb_ops audio_urb_ops_high_speed[2] = { { - .prepare = prepare_startup_playback_urb, + .prepare = prepare_nodata_playback_urb, .retire = retire_playback_urb, .prepare_sync = prepare_playback_sync_urb_hs, .retire_sync = retire_playback_sync_urb_hs, @@ -925,10 +935,14 @@ static int snd_usb_pcm_playback_trigger(struct snd_pcm_substream *substream, switch (cmd) { case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: subs->ops.prepare = prepare_playback_urb; return 0; case SNDRV_PCM_TRIGGER_STOP: return deactivate_urbs(subs, 0, 0); + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + subs->ops.prepare = prepare_nodata_playback_urb; + return 0; default: return -EINVAL; } @@ -944,9 +958,16 @@ static int snd_usb_pcm_capture_trigger(struct snd_pcm_substream *substream, switch (cmd) { case SNDRV_PCM_TRIGGER_START: + subs->ops.retire = retire_capture_urb; return start_urbs(subs, substream->runtime); case SNDRV_PCM_TRIGGER_STOP: return deactivate_urbs(subs, 0, 0); + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + subs->ops.retire = retire_paused_capture_urb; + return 0; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + subs->ops.retire = retire_capture_urb; + return 0; default: return -EINVAL; } @@ -1505,7 +1526,7 @@ static int snd_usb_pcm_prepare(struct snd_pcm_substream *substream) /* for playback, submit the URBs now; otherwise, the first hwptr_done * updates for all URBs would happen at the same time when starting */ if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) { - subs->ops.prepare = prepare_startup_playback_urb; + subs->ops.prepare = prepare_nodata_playback_urb; return start_urbs(subs, runtime); } else return 0; @@ -1517,7 +1538,8 @@ static struct snd_pcm_hardware snd_usb_hardware = SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH | SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_BLOCK_TRANSFER, + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_PAUSE, .buffer_bytes_max = 1024 * 1024, .period_bytes_min = 64, .period_bytes_max = 512 * 1024, |