diff options
| author | Ricard Wanderlof | 2015-10-19 08:52:49 +0200 |
|---|---|---|
| committer | Takashi Iwai | 2015-10-19 12:38:06 +0200 |
| commit | 07a40c2fc6f771a4abb2acc7e59434121e9ddf4e (patch) | |
| tree | 2956668fb810aeaea6ebcb7a85578d2513ee567e /sound/usb | |
| parent | 759a2f40c9fa3839c021f7cdc4ec19d10fd63b44 (diff) | |
ALSA: USB-audio: Break out copying to urb from prepare_playback_urb()
Refactoring in preparation for adding Zoom R16/24 quirk.
No functional change.
Signed-off-by: Ricard Wanderlof <ricardw@axis.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/pcm.c | 35 |
1 files changed, 21 insertions, 14 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index cdac5179db3f..4292bad9f320 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -1385,6 +1385,26 @@ static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, } } +static void copy_to_urb(struct snd_usb_substream *subs, + struct urb *urb, int stride, unsigned int bytes) +{ + struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; + + if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { + /* err, the transferred area goes over buffer boundary. */ + unsigned int bytes1 = + runtime->buffer_size * stride - subs->hwptr_done; + memcpy(urb->transfer_buffer, + runtime->dma_area + subs->hwptr_done, bytes1); + memcpy(urb->transfer_buffer + bytes1, + runtime->dma_area, bytes - bytes1); + } else { + memcpy(urb->transfer_buffer, + runtime->dma_area + subs->hwptr_done, bytes); + } + subs->hwptr_done += bytes; +} + static void prepare_playback_urb(struct snd_usb_substream *subs, struct urb *urb) { @@ -1462,20 +1482,7 @@ static void prepare_playback_urb(struct snd_usb_substream *subs, subs->hwptr_done += bytes; } else { /* usual PCM */ - if (subs->hwptr_done + bytes > runtime->buffer_size * stride) { - /* err, the transferred area goes over buffer boundary. */ - unsigned int bytes1 = - runtime->buffer_size * stride - subs->hwptr_done; - memcpy(urb->transfer_buffer, - runtime->dma_area + subs->hwptr_done, bytes1); - memcpy(urb->transfer_buffer + bytes1, - runtime->dma_area, bytes - bytes1); - } else { - memcpy(urb->transfer_buffer, - runtime->dma_area + subs->hwptr_done, bytes); - } - - subs->hwptr_done += bytes; + copy_to_urb(subs, urb, stride, bytes); } if (subs->hwptr_done >= runtime->buffer_size * stride) |