ALSA: line6: Skip volume manipulation during silence copying

A minor optimization; while pausing, the driver just copies the zero that doesn't need any volume changes. Tested-by: Chris Rorvick <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
josf · Jan 28, 2015 · 62a109d · 62a109d
1 parent c849153
commit 62a109d
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/sound/usb/line6/playback.c b/sound/usb/line6/playback.c
@@ -234,13 +234,14 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
 		line6pcm->out.pos += urb_frames;
 		if (line6pcm->out.pos >= runtime->buffer_size)
 			line6pcm->out.pos -= runtime->buffer_size;
+
+		change_volume(urb_out, line6pcm->volume_playback,
+			      bytes_per_frame);
 	} else {
 		memset(urb_out->transfer_buffer, 0,
 		       urb_out->transfer_buffer_length);
 	}
 
-	change_volume(urb_out, line6pcm->volume_playback, bytes_per_frame);
-
 	if (line6pcm->prev_fbuf != NULL) {
 		if (line6pcm->flags & LINE6_BITS_PCM_IMPULSE) {
 			create_impulse_test_signal(line6pcm, urb_out,