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ALSA: usb-audio: use a format bitmask per alternate setting

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In preparation for USB audio 2.0 support, change the audioformat
structure so that it uses a bitmask to specify possible formats.

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 19:46:15 +01:00
committed by Takashi Iwai
parent e11b4e0e4f
commit 015eb0b081
8 changed files with 34 additions and 22 deletions
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4
sound/usb/urb.c
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@@ -662,7 +662,7 @@ static int prepare_nodata_playback_urb(struct snd_usb_substream *subs,
urb->number_of_packets = ctx->packets;
urb->transfer_buffer_length = offs * stride;
memset(urb->transfer_buffer,
subs->cur_audiofmt->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
runtime->format == SNDRV_PCM_FORMAT_U8 ? 0x80 : 0,
offs * stride);
return 0;
}
@@ -924,7 +924,7 @@ void snd_usb_init_substream(struct snd_usb_stream *as,
snd_usb_set_pcm_ops(as->pcm, stream);
list_add_tail(&fp->list, &subs->fmt_list);
subs->formats |= 1ULL << fp->format;
subs->formats |= fp->formats;
subs->endpoint = fp->endpoint;
subs->num_formats++;
subs->fmt_type = fp->fmt_type;