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authorRicard Wanderlof <ricard.wanderlof@axis.com>2015-10-19 08:52:52 +0200
committerTakashi Iwai <tiwai@suse.de>2015-10-19 12:38:08 +0200
commitb97a936910c8d668d25d60acbf62aea0d2ff587e (patch)
tree912b8e329ad1f078d82610a99092ca3e3d4c6191 /sound
parent5cf310e976659caeaae350258940b73daaa0d478 (diff)
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')
-rw-r--r--sound/usb/pcm.c12
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 */