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ALSA: line6: Support assymetrical in/out configurations

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Splits max_packet_size to max_packet_size_in/out (e.g. for
different channel counts).

Signed-off-by: Andrej Krutak <dev@andree.sk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Andrej Krutak 2016-09-18 20:59:23 +02:00 committed by Takashi Iwai
parent 79faa2b048
commit 7a0f55aeeb
4 changed files with 28 additions and 22 deletions
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10
sound/usb/line6/capture.c
View File

@ -44,13 +44,13 @@ static int submit_audio_in_urb(struct snd_line6_pcm *line6pcm)
struct usb_iso_packet_descriptor *fin =
&urb_in->iso_frame_desc[i];
fin->offset = urb_size;
fin->length = line6pcm->max_packet_size;
urb_size += line6pcm->max_packet_size;
fin->length = line6pcm->max_packet_size_in;
urb_size += line6pcm->max_packet_size_in;
}
urb_in->transfer_buffer =
line6pcm->in.buffer +
index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
index * LINE6_ISO_PACKETS * line6pcm->max_packet_size_in;
urb_in->transfer_buffer_length = urb_size;
urb_in->context = line6pcm;
@ -173,10 +173,10 @@ static void audio_in_callback(struct urb *urb)
fbuf = urb->transfer_buffer + fin->offset;
fsize = fin->actual_length;
if (fsize > line6pcm->max_packet_size) {
if (fsize > line6pcm->max_packet_size_in) {
dev_err(line6pcm->line6->ifcdev,
"driver and/or device bug: packet too large (%d > %d)\n",
fsize, line6pcm->max_packet_size);
fsize, line6pcm->max_packet_size_in);
}
length += fsize;

33
sound/usb/line6/pcm.c
View File

@ -146,16 +146,20 @@ get_stream(struct snd_line6_pcm *line6pcm, int direction)
}
/* allocate a buffer if not opened yet;
* call this in line6pcm.state_change mutex
* call this in line6pcm.state_mutex
*/
static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm,
struct line6_pcm_stream *pstr, int type)
struct line6_pcm_stream *pstr, int direction, int type)
{
const int pkt_size =
(direction == SNDRV_PCM_STREAM_PLAYBACK) ?
line6pcm->max_packet_size_out :
line6pcm->max_packet_size_in;
/* Invoked multiple times in a row so allocate once only */
if (!test_and_set_bit(type, &pstr->opened) && !pstr->buffer) {
pstr->buffer = kmalloc(line6pcm->line6->iso_buffers *
LINE6_ISO_PACKETS *
line6pcm->max_packet_size, GFP_KERNEL);
LINE6_ISO_PACKETS * pkt_size, GFP_KERNEL);
if (!pstr->buffer)
return -ENOMEM;
}
@ -163,12 +167,11 @@ static int line6_buffer_acquire(struct snd_line6_pcm *line6pcm,
}
/* free a buffer if all streams are closed;
* call this in line6pcm.state_change mutex
* call this in line6pcm.state_mutex
*/
static void line6_buffer_release(struct snd_line6_pcm *line6pcm,
struct line6_pcm_stream *pstr, int type)
{
clear_bit(type, &pstr->opened);
if (!pstr->opened) {
line6_wait_clear_audio_urbs(line6pcm, pstr);
@ -195,6 +198,7 @@ static int line6_stream_start(struct snd_line6_pcm *line6pcm, int direction,
else
ret = line6_submit_audio_in_all_urbs(line6pcm);
}
if (ret < 0)
clear_bit(type, &pstr->running);
spin_unlock_irqrestore(&pstr->lock, flags);
@ -290,7 +294,7 @@ int line6_pcm_acquire(struct snd_line6_pcm *line6pcm, int type)
mutex_lock(&line6pcm->state_mutex);
for (dir = 0; dir < 2; dir++) {
pstr = get_stream(line6pcm, dir);
ret = line6_buffer_acquire(line6pcm, pstr, type);
ret = line6_buffer_acquire(line6pcm, pstr, dir, type);
if (ret < 0)
goto error;
if (!pstr->running)
@ -335,7 +339,8 @@ int snd_line6_hw_params(struct snd_pcm_substream *substream,
struct line6_pcm_stream *pstr = get_stream(line6pcm, substream->stream);
mutex_lock(&line6pcm->state_mutex);
ret = line6_buffer_acquire(line6pcm, pstr, LINE6_STREAM_PCM);
ret = line6_buffer_acquire(line6pcm, pstr, substream->stream,
LINE6_STREAM_PCM);
if (ret < 0)
goto error;
@ -530,12 +535,12 @@ int line6_init_pcm(struct usb_line6 *line6,
line6pcm->volume_monitor = 255;
line6pcm->line6 = line6;
/* Read and write buffers are sized identically, so choose minimum */
line6pcm->max_packet_size = min(
usb_maxpacket(line6->usbdev,
usb_rcvisocpipe(line6->usbdev, ep_read), 0),
usb_maxpacket(line6->usbdev,
usb_sndisocpipe(line6->usbdev, ep_write), 1));
line6pcm->max_packet_size_in =
usb_maxpacket(line6->usbdev,
usb_rcvisocpipe(line6->usbdev, ep_read), 0);
line6pcm->max_packet_size_out =
usb_maxpacket(line6->usbdev,
usb_sndisocpipe(line6->usbdev, ep_write), 1);
spin_lock_init(&line6pcm->out.lock);
spin_lock_init(&line6pcm->in.lock);

5
sound/usb/line6/pcm.h
View File

@ -156,11 +156,12 @@ struct snd_line6_pcm {
/* Previously captured frame (for software monitoring) */
unsigned char *prev_fbuf;
/* Size of previously captured frame (for software monitoring) */
/* Size of previously captured frame (for software monitoring/sync) */
int prev_fsize;
/* Maximum size of USB packet */
int max_packet_size;
int max_packet_size_in;
int max_packet_size_out;
/* PCM playback volume (left and right) */
int volume_playback[2];

2
sound/usb/line6/playback.c
View File

@ -195,7 +195,7 @@ static int submit_audio_out_urb(struct snd_line6_pcm *line6pcm)
urb_frames = urb_size / bytes_per_frame;
urb_out->transfer_buffer =
line6pcm->out.buffer +
index * LINE6_ISO_PACKETS * line6pcm->max_packet_size;
index * LINE6_ISO_PACKETS * line6pcm->max_packet_size_out;
urb_out->transfer_buffer_length = urb_size;
urb_out->context = line6pcm;