87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
#include "sumsamples.h"
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#include <QDebug>
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const int SampleSummer::kSumSampleRate = 200;
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QVector<SampleSummer::Sum> SampleSummer::SumSamples(const float *samples, int nb_samples, int nb_channels)
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{
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return SumSamplesInternal<float>(samples, nb_samples, nb_channels);
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}
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QVector<SampleSummer::Sum> SampleSummer::SumSamples(const qfloat16 *samples, int nb_samples, int nb_channels)
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{
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return SumSamplesInternal<qfloat16>(samples, nb_samples, nb_channels);
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}
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QVector<SampleSummer::Sum> SampleSummer::SumSamples(SampleBufferPtr samples, int start_index, int length)
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{
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QVector<SampleSummer::Sum> summed_samples(samples->audio_params().channel_count());
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int end_index = start_index + length;
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for (int i=start_index;i<end_index;i++) {
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for (int channel=0;channel<samples->audio_params().channel_count();channel++) {
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ClampMinMax<float>(summed_samples[channel], samples->data()[channel][i]);
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}
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}
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return summed_samples;
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}
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QVector<SampleSummer::Sum> SampleSummer::ReSumSamples(const SampleSummer::Sum *samples, int nb_samples, int nb_channels)
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{
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QVector<SampleSummer::Sum> summed_samples(nb_channels);
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for (int i=0;i<nb_samples;i++) {
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int channel = i%nb_channels;
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const SampleSummer::Sum& sample = samples[i];
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if (sample.min < summed_samples[channel].min) {
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summed_samples[channel].min = sample.min;
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}
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if (sample.max > summed_samples[channel].max) {
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summed_samples[channel].max = sample.max;
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}
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}
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return summed_samples;
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}
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SampleSummer::Sum::Sum()
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{
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min = 0;
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max = 0;
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}
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template<typename T>
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QVector<SampleSummer::Sum> SampleSummer::SumSamplesInternal(const T *samples, int nb_samples, int nb_channels)
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{
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QVector<SampleSummer::Sum> summed_samples(nb_channels);
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for (int i=0;i<nb_samples;i++) {
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ClampMinMax<T>(summed_samples[i%nb_channels], samples[i]);
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}
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return summed_samples;
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}
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template<typename T>
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void SampleSummer::ClampMinMax(SampleSummer::Sum &sum, T value)
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{
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if (value < sum.min) {
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sum.min = value;
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}
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if (value > sum.max) {
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sum.max = value;
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}
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}
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SampleSummer::Info::Info()
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{
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channels = 0;
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}
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