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authorStas Sergeev <stsp@aknet.ru>2008-03-22 10:12:37 +0100
committerTakashi Iwai <tiwai@suse.de>2008-04-24 12:00:30 +0200
commitc81d80cbf6dfe4c061719cb146659677c3c36c8e (patch)
tree67c5cc2b0407c6217f61787879e9366d05d35894 /sound/drivers
parent95866d38028c98ea4d6df6947f6ea3fd77334382 (diff)
[ALSA] pcsp: remove downsampling
pcsp: remove S16->U8 downsampling as dmix now supports U8 natively. Signed-off-by: Stas Sergeev <stsp@aknet.ru> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/drivers')
-rw-r--r--sound/drivers/pcsp/pcsp_lib.c19
1 files changed, 5 insertions, 14 deletions
diff --git a/sound/drivers/pcsp/pcsp_lib.c b/sound/drivers/pcsp/pcsp_lib.c
index 54253e9b4b02..ac6238e93513 100644
--- a/sound/drivers/pcsp/pcsp_lib.c
+++ b/sound/drivers/pcsp/pcsp_lib.c
@@ -18,8 +18,6 @@ module_param(nforce_wa, bool, 0444);
MODULE_PARM_DESC(nforce_wa, "Apply NForce chipset workaround "
"(expect bad sound)");
-#define DMIX_WANTS_S16 1
-
static void pcsp_start_timer(unsigned long dummy)
{
hrtimer_start(&pcsp_chip.timer, ktime_set(0, 0), HRTIMER_MODE_REL);
@@ -49,7 +47,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
{
unsigned long flags;
unsigned char timer_cnt, val;
- int fmt_size, periods_elapsed;
+ int periods_elapsed;
u64 ns;
size_t period_bytes, buffer_bytes;
struct snd_pcm_substream *substream;
@@ -94,11 +92,8 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
goto exit_nr_unlock2;
runtime = substream->runtime;
- fmt_size = snd_pcm_format_physical_width(runtime->format) >> 3;
- /* assume it is mono! */
- val = runtime->dma_area[chip->playback_ptr + fmt_size - 1];
- if (snd_pcm_format_signed(runtime->format))
- val ^= 0x80;
+ /* assume it is u8 mono */
+ val = runtime->dma_area[chip->playback_ptr];
timer_cnt = val * CUR_DIV() / 256;
if (timer_cnt && chip->enable) {
@@ -116,7 +111,7 @@ enum hrtimer_restart pcsp_do_timer(struct hrtimer *handle)
period_bytes = snd_pcm_lib_period_bytes(substream);
buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
- chip->playback_ptr += PCSP_INDEX_INC() * fmt_size;
+ chip->playback_ptr += PCSP_INDEX_INC();
periods_elapsed = chip->playback_ptr - chip->period_ptr;
if (periods_elapsed < 0) {
printk(KERN_WARNING "PCSP: playback_ptr inconsistent "
@@ -275,11 +270,7 @@ static struct snd_pcm_hardware snd_pcsp_playback = {
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_HALF_DUPLEX |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
- .formats = (SNDRV_PCM_FMTBIT_U8
-#if DMIX_WANTS_S16
- | SNDRV_PCM_FMTBIT_S16_LE
-#endif
- ),
+ .formats = SNDRV_PCM_FMTBIT_U8,
.rates = SNDRV_PCM_RATE_KNOT,
.rate_min = PCSP_DEFAULT_SRATE,
.rate_max = PCSP_DEFAULT_SRATE,