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ALSA: usb: stream: move audioformat alloc/init into separate function

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Offload snd_usb_parse_audio_interface() function which
became quite long after adding UAC3 spec support.

Move audioformat allocation and initialization
into separate function, this will make easier
future refactoring.
Attributes left in the original func because it'll
be used for UAC3 BADD profiles suport in the future

There is no functional change.

Signed-off-by: Ruslan Bilovol <ruslan.bilovol@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Ruslan Bilovol 2018-05-04 04:23:58 +03:00 committed by Takashi Iwai
parent 8c558076c7
commit 4d47fa8447
1 changed files with 36 additions and 16 deletions
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52
sound/usb/stream.c
View file

@ -626,6 +626,37 @@ snd_usb_find_output_terminal_descriptor(struct usb_host_interface *ctrl_iface,
return NULL;
}
static struct audioformat *
audio_format_alloc_init(struct snd_usb_audio *chip,
struct usb_host_interface *alts,
int protocol, int iface_no, int altset_idx,
int altno, int num_channels, int clock)
{
struct audioformat *fp;
fp = kzalloc(sizeof(*fp), GFP_KERNEL);
if (!fp)
return NULL;
fp->iface = iface_no;
fp->altsetting = altno;
fp->altset_idx = altset_idx;
fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
fp->datainterval = snd_usb_parse_datainterval(chip, alts);
fp->protocol = protocol;
fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
fp->channels = num_channels;
if (snd_usb_get_speed(chip->dev) == USB_SPEED_HIGH)
fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
* (fp->maxpacksize & 0x7ff);
fp->clock = clock;
INIT_LIST_HEAD(&fp->list);
return fp;
}
int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
{
struct usb_device *dev;
@ -928,25 +959,14 @@ int snd_usb_parse_audio_interface(struct snd_usb_audio *chip, int iface_no)
continue;
}
fp = kzalloc(sizeof(*fp), GFP_KERNEL);
fp = audio_format_alloc_init(chip, alts, protocol, iface_no, i,
altno, num_channels, clock);
if (!fp)
return -ENOMEM;
fp->iface = iface_no;
fp->altsetting = altno;
fp->altset_idx = i;
fp->endpoint = get_endpoint(alts, 0)->bEndpointAddress;
fp->ep_attr = get_endpoint(alts, 0)->bmAttributes;
fp->datainterval = snd_usb_parse_datainterval(chip, alts);
fp->protocol = protocol;
fp->maxpacksize = le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize);
fp->channels = num_channels;
if (snd_usb_get_speed(dev) == USB_SPEED_HIGH)
fp->maxpacksize = (((fp->maxpacksize >> 11) & 3) + 1)
* (fp->maxpacksize & 0x7ff);
fp->attributes = parse_uac_endpoint_attributes(chip, alts, protocol, iface_no);
fp->clock = clock;
INIT_LIST_HEAD(&fp->list);
fp->attributes = parse_uac_endpoint_attributes(chip, alts,
protocol,
iface_no);
/* some quirks for attributes here */
snd_usb_audioformat_attributes_quirk(chip, fp, stream);