diff options
Diffstat (limited to 'sound/usb')
| -rw-r--r-- | sound/usb/6fire/pcm.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c index 2110cbf35474..7ea698793d43 100644 --- a/sound/usb/6fire/pcm.c +++ b/sound/usb/6fire/pcm.c @@ -64,7 +64,7 @@ static const struct snd_pcm_hardware pcm_hw = { SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH, - .formats = SNDRV_PCM_FMTBIT_S24_LE, + .formats = SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE, .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | @@ -228,7 +228,7 @@ static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb) unsigned int total_length = 0; struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance); struct snd_pcm_runtime *alsa_rt = sub->instance->runtime; - u32 *src = (u32 *) urb->buffer; + u32 *src = NULL; u32 *dest = (u32 *) (alsa_rt->dma_area + sub->dma_off * (alsa_rt->frame_bits >> 3)); u32 *dest_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size @@ -244,7 +244,12 @@ static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb) else frame_count = 0; - src = (u32 *) (urb->buffer + total_length); + if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE) + src = (u32 *) (urb->buffer + total_length); + else if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE) + src = (u32 *) (urb->buffer - 1 + total_length); + else + return; src++; /* skip leading 4 bytes of every packet */ total_length += urb->packets[i].length; for (frame = 0; frame < frame_count; frame++) { @@ -274,9 +279,18 @@ static void usb6fire_pcm_playback(struct pcm_substream *sub, * (alsa_rt->frame_bits >> 3)); u32 *src_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size * (alsa_rt->frame_bits >> 3)); - u32 *dest = (u32 *) urb->buffer; + u32 *dest; int bytes_per_frame = alsa_rt->channels << 2; + if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE) + dest = (u32 *) (urb->buffer - 1); + else if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE) + dest = (u32 *) (urb->buffer); + else { + snd_printk(KERN_ERR PREFIX "Unknown sample format."); + return; + } + for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) { /* at least 4 header bytes for valid packet. * after that: 32 bits per sample for analog channels */ |
