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-rw-r--r--src/pcm_utils.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/src/pcm_utils.c b/src/pcm_utils.c
index c06c7e1ab..a68542f4a 100644
--- a/src/pcm_utils.c
+++ b/src/pcm_utils.c
@@ -53,7 +53,8 @@ pcm_volume_change_8(int8_t *buffer, unsigned num_samples, int volume)
while (num_samples > 0) {
int32_t sample = *buffer;
- sample = (sample * volume + pcm_dither() + 500) / 1000;
+ sample = (sample * volume + pcm_dither() + PCM_VOLUME_1 / 2)
+ / PCM_VOLUME_1;
*buffer++ = pcm_range(sample, 8);
--num_samples;
@@ -66,7 +67,8 @@ pcm_volume_change_16(int16_t *buffer, unsigned num_samples, int volume)
while (num_samples > 0) {
int32_t sample = *buffer;
- sample = (sample * volume + pcm_dither() + 500) / 1000;
+ sample = (sample * volume + pcm_dither() + PCM_VOLUME_1 / 2)
+ / PCM_VOLUME_1;
*buffer++ = pcm_range(sample, 16);
--num_samples;
@@ -79,7 +81,8 @@ pcm_volume_change_24(int32_t *buffer, unsigned num_samples, int volume)
while (num_samples > 0) {
int64_t sample = *buffer;
- sample = (sample * volume + pcm_dither() + 500) / 1000;
+ sample = (sample * volume + pcm_dither() + PCM_VOLUME_1 / 2)
+ / PCM_VOLUME_1;
*buffer++ = pcm_range(sample, 24);
--num_samples;
@@ -90,7 +93,7 @@ void pcm_volume(char *buffer, int bufferSize,
const struct audio_format *format,
int volume)
{
- if (volume >= 1000)
+ if (volume >= PCM_VOLUME_1)
return;
if (volume <= 0) {
@@ -128,7 +131,7 @@ pcm_add_8(int8_t *buffer1, const int8_t *buffer2,
int32_t sample2 = *buffer2++;
sample1 = ((sample1 * volume1 + sample2 * volume2) +
- pcm_dither() + 500) / 1000;
+ pcm_dither() + PCM_VOLUME_1 / 2) / PCM_VOLUME_1;
*buffer1++ = pcm_range(sample1, 8);
--num_samples;
@@ -144,7 +147,7 @@ pcm_add_16(int16_t *buffer1, const int16_t *buffer2,
int32_t sample2 = *buffer2++;
sample1 = ((sample1 * volume1 + sample2 * volume2) +
- pcm_dither() + 500) / 1000;
+ pcm_dither() + PCM_VOLUME_1 / 2) / PCM_VOLUME_1;
*buffer1++ = pcm_range(sample1, 16);
--num_samples;
@@ -160,7 +163,7 @@ pcm_add_24(int32_t *buffer1, const int32_t *buffer2,
int64_t sample2 = *buffer2++;
sample1 = ((sample1 * volume1 + sample2 * volume2) +
- pcm_dither() + 500) / 1000;
+ pcm_dither() + PCM_VOLUME_1 / 2) / PCM_VOLUME_1;
*buffer1++ = pcm_range(sample1, 24);
--num_samples;
@@ -200,10 +203,10 @@ void pcm_mix(char *buffer1, const char *buffer2, size_t size,
float s = sin(M_PI_2 * portion1);
s *= s;
- vol1 = s * 1000 + 0.5;
- vol1 = vol1 > 1000 ? 1000 : (vol1 < 0 ? 0 : vol1);
+ vol1 = s * PCM_VOLUME_1 + 0.5;
+ vol1 = vol1 > PCM_VOLUME_1 ? PCM_VOLUME_1 : (vol1 < 0 ? 0 : vol1);
- pcm_add(buffer1, buffer2, size, vol1, 1000 - vol1, format);
+ pcm_add(buffer1, buffer2, size, vol1, PCM_VOLUME_1 - vol1, format);
}
void pcm_convert_init(struct pcm_convert_state *state)