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Use signed int, since all the samples are in that form.

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This will help future implementation of soft amplifier
with variable/relative 0db.
This commit is contained in:
Ariff Abdullah 2007-06-16 20:36:39 +00:00
parent 48c513e07f
commit c17bfa7714
1 changed files with 4 additions and 4 deletions
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8
sys/dev/sound/pcm/feeder_volume.c
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@ -36,14 +36,14 @@ SND_DECLARE_FILE("$FreeBSD$");
#define FVOL_CLAMP(val) (((val) << FVOL_RESOLUTION) / FVOL_OSS_SCALE)
#define FVOL_LEFT(val) FVOL_CLAMP((val) & 0x7f)
#define FVOL_RIGHT(val) FVOL_LEFT((val) >> 8)
#define FVOL_MAX (1U << FVOL_RESOLUTION)
#define FVOL_MAX (1 << FVOL_RESOLUTION)
#define FVOL_CALC(sval, vval) (((sval) * (vval)) >> FVOL_RESOLUTION)
typedef uint32_t (*feed_volume_filter)(uint8_t *, uint32_t *, uint32_t);
typedef uint32_t (*feed_volume_filter)(uint8_t *, int *, uint32_t);
#define FEEDER_VOLUME_FILTER(FMTBIT, VOL_INTCAST, SIGN, SIGNS, ENDIAN, ENDIANS) \
static uint32_t \
feed_volume_filter_##SIGNS##FMTBIT##ENDIANS(uint8_t *b, uint32_t *vol, \
feed_volume_filter_##SIGNS##FMTBIT##ENDIANS(uint8_t *b, int *vol, \
uint32_t count) \
{ \
int32_t j; \
@ -137,7 +137,7 @@ feed_volume(struct pcm_feeder *f, struct pcm_channel *c, uint8_t *b,
uint32_t count, void *source)
{
struct feed_volume_info *info;
uint32_t vol[2];
int vol[2];
int k, smpsz;
vol[0] = FVOL_LEFT(c->volume);