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samples-util: add padding to volume array

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Pad the volume array with a copy of the start. We'll need this later to be able
to write optimized functions.
This commit is contained in:
Wim Taymans 2009-08-12 17:03:30 +02:00
parent 3d008961c0
commit 2d73f13567
1 changed files with 17 additions and 5 deletions
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22
src/pulsecore/sample-util.c
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@ -103,24 +103,36 @@ void* pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec) {
return p;
}
#define VOLUME_PADDING 32
static void calc_linear_integer_volume(int32_t linear[], const pa_cvolume *volume) {
unsigned channel;
unsigned channel, nchannels, padding;
pa_assert(linear);
pa_assert(volume);
for (channel = 0; channel < volume->channels; channel++)
nchannels = volume->channels;
for (channel = 0; channel < nchannels; channel++)
linear[channel] = (int32_t) lrint(pa_sw_volume_to_linear(volume->values[channel]) * 0x10000);
for (padding = 0; padding < VOLUME_PADDING; padding++, channel++)
linear[channel] = linear[padding];
}
static void calc_linear_float_volume(float linear[], const pa_cvolume *volume) {
unsigned channel;
unsigned channel, nchannels, padding;
pa_assert(linear);
pa_assert(volume);
for (channel = 0; channel < volume->channels; channel++)
nchannels = volume->channels;
for (channel = 0; channel < nchannels; channel++)
linear[channel] = (float) pa_sw_volume_to_linear(volume->values[channel]);
for (padding = 0; padding < VOLUME_PADDING; padding++, channel++)
linear[channel] = linear[padding];
}
static void calc_linear_integer_stream_volumes(pa_mix_info streams[], unsigned nstreams, const pa_cvolume *volume, const pa_sample_spec *spec) {
@ -716,7 +728,7 @@ void pa_volume_memchunk(
const pa_cvolume *volume) {
void *ptr;
volume_val linear[PA_CHANNELS_MAX];
volume_val linear[PA_CHANNELS_MAX + VOLUME_PADDING];
pa_do_volume_func_t do_volume;
pa_assert(c);