diff options
| author | Ricard Wanderlof <ricard.wanderlof@axis.com> | 2015-10-19 08:52:52 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2015-10-19 12:38:08 +0200 |
| commit | b97a936910c8d668d25d60acbf62aea0d2ff587e (patch) | |
| tree | 912b8e329ad1f078d82610a99092ca3e3d4c6191 /sound/usb/pcm.c | |
| parent | 5cf310e976659caeaae350258940b73daaa0d478 (diff) | |
| download | linux-b97a936910c8d668d25d60acbf62aea0d2ff587e.tar.bz2 | |
ALSA: USB-audio: Add offset parameter to copy_to_urb()
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/pcm.c')
| -rw-r--r-- | sound/usb/pcm.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index ee8dd9efb3ef..e3c5bc0df69d 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -1387,8 +1387,8 @@ static inline void fill_playback_urb_dsd_dop(struct snd_usb_substream *subs, subs->hwptr_done -= runtime->buffer_size * stride; } -static void copy_to_urb(struct snd_usb_substream *subs, - struct urb *urb, int stride, unsigned int bytes) +static void copy_to_urb(struct snd_usb_substream *subs, struct urb *urb, + int offset, int stride, unsigned int bytes) { struct snd_pcm_runtime *runtime = subs->pcm_substream->runtime; @@ -1396,12 +1396,12 @@ static void copy_to_urb(struct snd_usb_substream *subs, /* err, the transferred area goes over buffer boundary. */ unsigned int bytes1 = runtime->buffer_size * stride - subs->hwptr_done; - memcpy(urb->transfer_buffer, + memcpy(urb->transfer_buffer + offset, runtime->dma_area + subs->hwptr_done, bytes1); - memcpy(urb->transfer_buffer + bytes1, + memcpy(urb->transfer_buffer + offset + bytes1, runtime->dma_area, bytes - bytes1); } else { - memcpy(urb->transfer_buffer, + memcpy(urb->transfer_buffer + offset, runtime->dma_area + subs->hwptr_done, bytes); } subs->hwptr_done += bytes; @@ -1488,7 +1488,7 @@ static void prepare_playback_urb(struct snd_usb_substream *subs, subs->hwptr_done -= runtime->buffer_size * stride; } else { /* usual PCM */ - copy_to_urb(subs, urb, stride, bytes); + copy_to_urb(subs, urb, 0, stride, bytes); } /* update delay with exact number of samples queued */ |