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Commit 62a109d9 authored by Takashi Iwai's avatar Takashi Iwai
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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: default avatarChris Rorvick <chris@rorvick.com>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent c8491535

sound/usb/line6/playback.c

+3 −2
Original line number Diff line number Diff line
@@ -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,