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volume: implement functions for multiplicating a cvolume with a scalar

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This commit is contained in:
Lennart Poettering 2009-06-17 03:04:21 +02:00
parent c6830bd9dc
commit 64b0f38b67
3 changed files with 47 additions and 3 deletions
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36
src/pulse/volume.c
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@ -344,7 +344,7 @@ pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const
pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
for (i = 0; i < a->channels && i < b->channels && i < PA_CHANNELS_MAX; i++)
for (i = 0; i < a->channels && i < b->channels; i++)
dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
dest->channels = (uint8_t) i;
@ -352,6 +352,22 @@ pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const
return dest;
}
pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
unsigned i;
pa_assert(dest);
pa_assert(a);
pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
for (i = 0; i < a->channels; i++)
dest->values[i] = pa_sw_volume_multiply(a->values[i], b);
dest->channels = (uint8_t) i;
return dest;
}
pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
unsigned i;
@ -362,7 +378,7 @@ pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa
pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
for (i = 0; i < a->channels && i < b->channels && i < PA_CHANNELS_MAX; i++)
for (i = 0; i < a->channels && i < b->channels; i++)
dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
dest->channels = (uint8_t) i;
@ -370,6 +386,22 @@ pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa
return dest;
}
pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
unsigned i;
pa_assert(dest);
pa_assert(a);
pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
for (i = 0; i < a->channels; i++)
dest->values[i] = pa_sw_volume_divide(a->values[i], b);
dest->channels = (uint8_t) i;
return dest;
}
int pa_cvolume_valid(const pa_cvolume *v) {
unsigned c;