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authorAndrej Krutak <dev@andree.sk>2016-09-18 21:59:24 +0300
committerTakashi Iwai <tiwai@suse.de>2016-09-20 00:00:16 +0300
commit97d78acfb870a67339957e9c4d36dc03242df315 (patch)
treee50c02a117e5a8e9f1ddf6272be6e53989f5f789 /sound/usb/line6/playback.c
parent7a0f55aeeb8f1fa32a119d34ddfefc6100936692 (diff)
downloadlinux-97d78acfb870a67339957e9c4d36dc03242df315.tar.xz
ALSA: line6: Allow different channel numbers for in/out
Changes bytes_per_frame to bytes_per_channel. Signed-off-by: Andrej Krutak <dev@andree.sk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/usb/line6/playback.c')
-rw-r--r--sound/usb/line6/playback.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/sound/usb/line6/playback.c b/sound/usb/line6/playback.c
index 08bacf3b025e..812d18191e01 100644
--- a/sound/usb/line6/playback.c
+++ b/sound/usb/line6/playback.c
@@ -146,7 +146,9 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
int index;
int i, urb_size, urb_frames;
int ret;
- const int bytes_per_frame = line6pcm->properties->bytes_per_frame;
+ const int bytes_per_frame =
+ line6pcm->properties->bytes_per_channel *
+ line6pcm->properties->playback_hw.channels_max;
const int frame_increment =
line6pcm->properties->rates.rats[0].num_min;
const int frame_factor =
@@ -165,6 +167,7 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
urb_out = line6pcm->out.urbs[index];
urb_size = 0;
+ /* TODO: this may not work for LINE6_ISO_PACKETS != 1 */
for (i = 0; i < LINE6_ISO_PACKETS; ++i) {
/* compute frame size for given sampling rate */
int fsize = 0;
@@ -178,9 +181,11 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
line6pcm->out.count += frame_increment;
n = line6pcm->out.count / frame_factor;
line6pcm->out.count -= n * frame_factor;
- fsize = n * bytes_per_frame;
+ fsize = n;
}
+ fsize *= bytes_per_frame;
+
fout->offset = urb_size;
fout->length = fsize;
urb_size += fsize;
@@ -305,6 +310,9 @@ static void audio_out_callback(struct urb *urb)
struct snd_line6_pcm *line6pcm = (struct snd_line6_pcm *)urb->context;
struct snd_pcm_substream *substream =
get_substream(line6pcm, SNDRV_PCM_STREAM_PLAYBACK);
+ const int bytes_per_frame =
+ line6pcm->properties->bytes_per_channel *
+ line6pcm->properties->playback_hw.channels_max;
#if USE_CLEAR_BUFFER_WORKAROUND
memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
@@ -329,7 +337,7 @@ static void audio_out_callback(struct urb *urb)
struct snd_pcm_runtime *runtime = substream->runtime;
line6pcm->out.pos_done +=
- length / line6pcm->properties->bytes_per_frame;
+ length / bytes_per_frame;
if (line6pcm->out.pos_done >= runtime->buffer_size)
line6pcm->out.pos_done -= runtime->buffer_size;