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ALSA: 6fire - Add support for S32_LE format 

Added support for sample format s32_le.

Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Torsten Schenk 2011-04-04 11:49:00 +02:00 committed by Takashi Iwai
parent e220fa3bf5
commit 58c54fa47f
1 changed files with 18 additions and 4 deletions
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22
sound/usb/6fire/pcm.c
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@ -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 */