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authorTorsten Schenk <torsten.schenk@zoho.com>2011-04-04 11:49:00 +0200
committerTakashi Iwai <tiwai@suse.de>2011-04-04 12:25:13 +0200
commit58c54fa47f5de976959767fa8d9bb857eee4c4e5 (patch)
tree4a1c0862e2f40ee569df857a73379be7bc1bb327 /sound/usb
parente220fa3bf503d63039fa8e0398a1c252d24663f9 (diff)
downloadlinux-linaro-precise-58c54fa47f5de976959767fa8d9bb857eee4c4e5.tar.gz
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>
Diffstat (limited to 'sound/usb')
-rw-r--r--sound/usb/6fire/pcm.c22
1 files changed, 18 insertions, 4 deletions
diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c
index 2110cbf3547..7ea698793d4 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 */