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ALSA: usb-audio: parse more format descriptors with structs 

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Daniel Mack 2010-05-26 18:11:36 +02:00 committed by Takashi Iwai
parent 1efddcc981
commit 74754f974b
3 changed files with 21 additions and 17 deletions
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11
sound/usb/endpoint.c
View File

@ -158,8 +158,9 @@ int snd_usb_parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
int i, altno, err, stream;
int format = 0, num_channels = 0;
struct audioformat *fp = NULL;
unsigned char *fmt, *csep;
unsigned char *csep;
int num, protocol;
struct uac_format_type_i_continuous_descriptor *fmt;
dev = chip->dev;
@ -256,8 +257,8 @@ int snd_usb_parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
dev->devnum, iface_no, altno);
continue;
}
if (((protocol == UAC_VERSION_1) && (fmt[0] < 8)) ||
((protocol == UAC_VERSION_2) && (fmt[0] != 6))) {
if (((protocol == UAC_VERSION_1) && (fmt->bLength < 8)) ||
((protocol == UAC_VERSION_2) && (fmt->bLength != 6))) {
snd_printk(KERN_ERR "%d:%u:%d : invalid UAC_FORMAT_TYPE desc\n",
dev->devnum, iface_no, altno);
continue;
@ -268,7 +269,9 @@ int snd_usb_parse_audio_endpoints(struct snd_usb_audio *chip, int iface_no)
* with the previous one, except for a larger packet size, but
* is actually a mislabeled two-channel setting; ignore it.
*/
if (fmt[4] == 1 && fmt[5] == 2 && altno == 2 && num == 3 &&
if (fmt->bNrChannels == 1 &&
fmt->bSubframeSize == 2 &&
altno == 2 && num == 3 &&
fp && fp->altsetting == 1 && fp->channels == 1 &&
fp->formats == SNDRV_PCM_FMTBIT_S16_LE &&
protocol == UAC_VERSION_1 &&

20
sound/usb/format.c
View File

@ -278,12 +278,11 @@ err:
* parse the format type I and III descriptors
*/
static int parse_audio_format_i(struct snd_usb_audio *chip,
struct audioformat *fp,
int format, void *_fmt,
struct audioformat *fp, int format,
struct uac_format_type_i_continuous_descriptor *fmt,
struct usb_host_interface *iface)
{
struct usb_interface_descriptor *altsd = get_iface_desc(iface);
struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
int protocol = altsd->bInterfaceProtocol;
int pcm_format, ret;
@ -320,7 +319,7 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
switch (protocol) {
case UAC_VERSION_1:
fp->channels = fmt->bNrChannels;
ret = parse_audio_format_rates_v1(chip, fp, _fmt, 7);
ret = parse_audio_format_rates_v1(chip, fp, (unsigned char *) fmt, 7);
break;
case UAC_VERSION_2:
/* fp->channels is already set in this case */
@ -392,12 +391,12 @@ static int parse_audio_format_ii(struct snd_usb_audio *chip,
}
int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
int format, unsigned char *fmt, int stream,
struct usb_host_interface *iface)
int format, struct uac_format_type_i_continuous_descriptor *fmt,
int stream, struct usb_host_interface *iface)
{
int err;
switch (fmt[3]) {
switch (fmt->bFormatType) {
case UAC_FORMAT_TYPE_I:
case UAC_FORMAT_TYPE_III:
err = parse_audio_format_i(chip, fp, format, fmt, iface);
@ -407,10 +406,11 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *f
break;
default:
snd_printd(KERN_INFO "%d:%u:%d : format type %d is not supported yet\n",
chip->dev->devnum, fp->iface, fp->altsetting, fmt[3]);
chip->dev->devnum, fp->iface, fp->altsetting,
fmt->bFormatType);
return -1;
}
fp->fmt_type = fmt[3];
fp->fmt_type = fmt->bFormatType;
if (err < 0)
return err;
#if 1
@ -421,7 +421,7 @@ int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *f
if (chip->usb_id == USB_ID(0x041e, 0x3000) ||
chip->usb_id == USB_ID(0x041e, 0x3020) ||
chip->usb_id == USB_ID(0x041e, 0x3061)) {
if (fmt[3] == UAC_FORMAT_TYPE_I &&
if (fmt->bFormatType == UAC_FORMAT_TYPE_I &&
fp->rates != SNDRV_PCM_RATE_48000 &&
fp->rates != SNDRV_PCM_RATE_96000)
return -1;

7
sound/usb/format.h
View File

@ -1,8 +1,9 @@
#ifndef __USBAUDIO_FORMAT_H
#define __USBAUDIO_FORMAT_H
int snd_usb_parse_audio_format(struct snd_usb_audio *chip, struct audioformat *fp,
int format, unsigned char *fmt, int stream,
struct usb_host_interface *iface);
int snd_usb_parse_audio_format(struct snd_usb_audio *chip,
struct audioformat *fp, int format,
struct uac_format_type_i_continuous_descriptor *fmt,
int stream, struct usb_host_interface *iface);
#endif /* __USBAUDIO_FORMAT_H */