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ALSA: usb-audio: support multiple formats with audio class v2 devices

Browse source 
Change the parser to correctly handle v2 descriptors with multiple
format bits set.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch 2010-03-04 19:46:16 +01:00 committed by Takashi Iwai
parent 015eb0b081
commit 29088fef3e
2 changed files with 40 additions and 57 deletions
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95
sound/usb/format.c
View file

@ -37,19 +37,20 @@
* @format: the format tag (wFormatTag)
* @fmt: the format type descriptor
*/
static int parse_audio_format_i_type(struct snd_usb_audio *chip,
static u64 parse_audio_format_i_type(struct snd_usb_audio *chip,
struct audioformat *fp,
int format, void *_fmt,
int protocol)
{
int pcm_format, i;
int sample_width, sample_bytes;
u64 pcm_formats;
switch (protocol) {
case UAC_VERSION_1: {
struct uac_format_type_i_discrete_descriptor *fmt = _fmt;
sample_width = fmt->bBitResolution;
sample_bytes = fmt->bSubframeSize;
format = 1 << format;
break;
}
@ -57,24 +58,7 @@ static int parse_audio_format_i_type(struct snd_usb_audio *chip,
struct uac_format_type_i_ext_descriptor *fmt = _fmt;
sample_width = fmt->bBitResolution;
sample_bytes = fmt->bSubslotSize;
/*
* FIXME
* USB audio class v2 devices specify a bitmap of possible
* audio formats rather than one fix value. For now, we just
* pick one of them and report that as the only possible
* value for this setting.
* The bit allocation map is in fact compatible to the
* wFormatTag of the v1 AS streaming descriptors, which is why
* we can simply map the matrix.
*/
for (i = 0; i < 5; i++)
if (format & (1UL << i)) {
format = i + 1;
break;
}
format <<= 1;
break;
}
@ -82,15 +66,15 @@ static int parse_audio_format_i_type(struct snd_usb_audio *chip,
return -EINVAL;
}
/* FIXME: correct endianess and sign? */
pcm_format = -1;
pcm_formats = 0;
switch (format) {
case UAC_FORMAT_TYPE_I_UNDEFINED: /* some devices don't define this correctly... */
if (format == 0 || format == (1 << UAC_FORMAT_TYPE_I_UNDEFINED)) {
/* some devices don't define this correctly... */
snd_printdd(KERN_INFO "%d:%u:%d : format type 0 is detected, processed as PCM\n",
chip->dev->devnum, fp->iface, fp->altsetting);
/* fall-through */
case UAC_FORMAT_TYPE_I_PCM:
format = 1 << UAC_FORMAT_TYPE_I_PCM;
}
if (format & (1 << UAC_FORMAT_TYPE_I_PCM)) {
if (sample_width > sample_bytes * 8) {
snd_printk(KERN_INFO "%d:%u:%d : sample bitwidth %d in over sample bytes %d\n",
chip->dev->devnum, fp->iface, fp->altsetting,
@ -99,22 +83,22 @@ static int parse_audio_format_i_type(struct snd_usb_audio *chip,
/* check the format byte size */
switch (sample_bytes) {
case 1:
pcm_format = SNDRV_PCM_FORMAT_S8;
pcm_formats |= SNDRV_PCM_FMTBIT_S8;
break;
case 2:
if (snd_usb_is_big_endian_format(chip, fp))
pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big endian!! */
pcm_formats |= SNDRV_PCM_FMTBIT_S16_BE; /* grrr, big endian!! */
else
pcm_format = SNDRV_PCM_FORMAT_S16_LE;
pcm_formats |= SNDRV_PCM_FMTBIT_S16_LE;
break;
case 3:
if (snd_usb_is_big_endian_format(chip, fp))
pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big endian!! */
pcm_formats |= SNDRV_PCM_FMTBIT_S24_3BE; /* grrr, big endian!! */
else
pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
pcm_formats |= SNDRV_PCM_FMTBIT_S24_3LE;
break;
case 4:
pcm_format = SNDRV_PCM_FORMAT_S32_LE;
pcm_formats |= SNDRV_PCM_FMTBIT_S32_LE;
break;
default:
snd_printk(KERN_INFO "%d:%u:%d : unsupported sample bitwidth %d in %d bytes\n",
@ -122,30 +106,29 @@ static int parse_audio_format_i_type(struct snd_usb_audio *chip,
sample_width, sample_bytes);
break;
}
break;
case UAC_FORMAT_TYPE_I_PCM8:
pcm_format = SNDRV_PCM_FORMAT_U8;
}
if (format & (1 << UAC_FORMAT_TYPE_I_PCM8)) {
/* Dallas DS4201 workaround: it advertises U8 format, but really
supports S8. */
if (chip->usb_id == USB_ID(0x04fa, 0x4201))
pcm_format = SNDRV_PCM_FORMAT_S8;
break;
case UAC_FORMAT_TYPE_I_IEEE_FLOAT:
pcm_format = SNDRV_PCM_FORMAT_FLOAT_LE;
break;
case UAC_FORMAT_TYPE_I_ALAW:
pcm_format = SNDRV_PCM_FORMAT_A_LAW;
break;
case UAC_FORMAT_TYPE_I_MULAW:
pcm_format = SNDRV_PCM_FORMAT_MU_LAW;
break;
default:
snd_printk(KERN_INFO "%d:%u:%d : unsupported format type %d\n",
chip->dev->devnum, fp->iface, fp->altsetting, format);
break;
pcm_formats |= SNDRV_PCM_FMTBIT_S8;
else
pcm_formats |= SNDRV_PCM_FMTBIT_U8;
}
return pcm_format;
if (format & (1 << UAC_FORMAT_TYPE_I_IEEE_FLOAT)) {
pcm_formats |= SNDRV_PCM_FMTBIT_FLOAT_LE;
}
if (format & (1 << UAC_FORMAT_TYPE_I_ALAW)) {
pcm_formats |= SNDRV_PCM_FMTBIT_A_LAW;
}
if (format & (1 << UAC_FORMAT_TYPE_I_MULAW)) {
pcm_formats |= SNDRV_PCM_FMTBIT_MU_LAW;
}
if (format & ~0x3f) {
snd_printk(KERN_INFO "%d:%u:%d : unsupported format bits %#x\n",
chip->dev->devnum, fp->iface, fp->altsetting, format);
}
return pcm_formats;
}
@ -317,14 +300,14 @@ static int parse_audio_format_i(struct snd_usb_audio *chip,
default:
pcm_format = SNDRV_PCM_FORMAT_S16_LE;
}
fp->formats = 1uLL << pcm_format;
} else {
pcm_format = parse_audio_format_i_type(chip, fp, format, fmt, protocol);
if (pcm_format < 0)
fp->formats = parse_audio_format_i_type(chip, fp, format,
fmt, protocol);
if (!fp->formats)
return -1;
}
fp->formats = 1uLL << pcm_format;
/* gather possible sample rates */
/* audio class v1 reports possible sample rates as part of the
* proprietary class specific descriptor.

2
sound/usb/quirks-table.h
View file

@ -2203,7 +2203,7 @@ YAMAHA_DEVICE(0x7010, "UB99"),
.ifnum = 1,
.type = QUIRK_AUDIO_FIXED_ENDPOINT,
.data = &(const struct audioformat) {
.format = SNDRV_PCM_FORMAT_S24_3BE,
.formats = SNDRV_PCM_FMTBIT_S24_3BE,
.channels = 2,
.iface = 1,
.altsetting = 1,