great, ,just great.
on which kernel-version should this patch be applied on?
it would be great if it would run with 2.6.4 standart, because
this kernel seems to be quite stable and works with my nvidia nicely.
thanks a lot.
marc
Patrick Shirkey wrote:
> metafor@xxxxxxx wrote:
>
>> hi alan
>>
>> if i manage to get the card working i will write a howto, that's for
>> sure, because
>> it seems that i am definetly not the only one who has problems to
>> setup up the
>> card properly. i let you know.
>>
>
> First good news for a while with this device.
>
> Clemens made a patch last week which I finally tested tonight. It
> allowed me to record crystal clear cd quality and 24 bit audio.
>
> Took us two years to figure out that the mAudio team had made it use
> big endian format for input and little endian for output.
>
> What a bunch of #@$X!!##
>
> Here's the patch which I'm sure will be committed to cvs in the next
> few days.
>
> --------------------------
>
> Index: alsa-kernel/usb/usbaudio.c
> ===================================================================
> RCS file: /cvsroot/alsa/alsa-kernel/usb/usbaudio.c,v
> retrieving revision 1.100
> diff -u -r1.100 usbaudio.c
> --- alsa-kernel/usb/usbaudio.c 5 May 2004 08:50:45 -0000 1.100
> +++ alsa-kernel/usb/usbaudio.c 10 Jun 2004 17:00:40 -0000
> @@ -2182,6 +2182,24 @@
>
>
> /*
> + * check if the device uses big-endian samples
> + */
> +static int is_big_endian_format(struct usb_device *dev, struct
> audioformat *fp)
> +{
> + /* M-Audio */
> + if (dev->descriptor.idVendor == 0x0763) {
> + /* Quattro: captured data only */
> + if (dev->descriptor.idProduct == 0x2001 &&
> + fp->endpoint & USB_DIR_IN)
> + return 1;
> + /* Audiophile USB */
> + if (dev->descriptor.idProduct == 0x2003)
> + return 1;
> + }
> + return 0;
> +}
> +
> +/*
> * parse the audio format type I descriptor
> * and returns the corresponding pcm format
> *
> @@ -2217,17 +2235,13 @@
> pcm_format = SNDRV_PCM_FORMAT_S8;
> break;
> case 2:
> - /* M-Audio audiophile USB workaround */
> - if (dev->descriptor.idVendor == 0x0763 &&
> - dev->descriptor.idProduct == 0x2003)
> + if (is_big_endian_format(dev, fp))
> pcm_format = SNDRV_PCM_FORMAT_S16_BE; /* grrr, big
> endian!! */
> else
> pcm_format = SNDRV_PCM_FORMAT_S16_LE;
> break;
> case 3:
> - /* M-Audio audiophile USB workaround */
> - if (dev->descriptor.idVendor == 0x0763 &&
> - dev->descriptor.idProduct == 0x2003)
> + if (is_big_endian_format(dev, fp))
> pcm_format = SNDRV_PCM_FORMAT_S24_3BE; /* grrr, big
> endian!! */
> else
> pcm_format = SNDRV_PCM_FORMAT_S24_3LE;
> Index: alsa-kernel/usb/usbquirks.h
> ===================================================================
> RCS file: /cvsroot/alsa/alsa-kernel/usb/usbquirks.h,v
> retrieving revision 1.33
> diff -u -r1.33 usbquirks.h
> --- alsa-kernel/usb/usbquirks.h 12 May 2004 06:29:22 -0000 1.33
> +++ alsa-kernel/usb/usbquirks.h 10 Jun 2004 17:00:40 -0000
> @@ -830,11 +830,42 @@
> .driver_info = (unsigned long) & (const snd_usb_audio_quirk_t) {
> .vendor_name = "M-Audio",
> .product_name = "Quattro",
> - .ifnum = 9,
> - .type = QUIRK_MIDI_MIDIMAN,
> - .data = & (const snd_usb_midi_endpoint_info_t) {
> - .out_cables = 0x0001,
> - .in_cables = 0x0001
> + .ifnum = QUIRK_ANY_INTERFACE,
> + .type = QUIRK_COMPOSITE,
> + .data = & (const snd_usb_audio_quirk_t[]) {
> + /*
> + * Interfaces 0-2 are "Windows-compatible", 16-bit only,
> + * and share endpoints with the other interfaces.
> + * Ignore them. The other interfaces can do 24 bits,
> + * but captured samples are big-endian (see usbaudio.c).
> + */
> + {
> + .ifnum = 4,
> + .type = QUIRK_AUDIO_STANDARD_INTERFACE
> + },
> + {
> + .ifnum = 5,
> + .type = QUIRK_AUDIO_STANDARD_INTERFACE
> + },
> + {
> + .ifnum = 7,
> + .type = QUIRK_AUDIO_STANDARD_INTERFACE
> + },
> + {
> + .ifnum = 8,
> + .type = QUIRK_AUDIO_STANDARD_INTERFACE
> + },
> + {
> + .ifnum = 9,
> + .type = QUIRK_MIDI_MIDIMAN,
> + .data = & (const snd_usb_midi_endpoint_info_t) {
> + .out_cables = 0x0001,
> + .in_cables = 0x0001
> + }
> + },
> + {
> + .ifnum = -1
> + }
> }
> }
> },
>
>
>
>
>
>
>
> -------------------
>
