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/**
* @file
* @brief Unit tests for openshot::AudioWaveformer
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
// Copyright (c) 2008-2022 OpenShot Studios, LLC
//
// SPDX-License-Identifier: LGPL-3.0-or-later
#include "openshot_catch.h"
#include "AudioWaveformer.h"
#include "FFmpegReader.h"
using namespace openshot;
TEST_CASE( "Extract waveform data piano.wav", "[libopenshot][audiowaveformer]" )
{
// Create a reader
std::stringstream path;
path << TEST_MEDIA_PATH << "piano.wav";
FFmpegReader r(path.str());
r.Open();
// Create AudioWaveformer and extract a smaller "average" sample set of audio data
AudioWaveformer waveformer(&r);
for (auto channel = 0; channel < r.info.channels; channel++) {
AudioWaveformData waveform = waveformer.ExtractSamples(channel, 20, false);
if (channel == 0) {
CHECK(waveform.rms_samples.size() == 107);
CHECK(waveform.rms_samples[0] == Approx(0.04879f).margin(0.00001));
CHECK(waveform.rms_samples[86] == Approx(0.13578f).margin(0.00001));
CHECK(waveform.rms_samples[87] == Approx(0.0f).margin(0.00001));
} else if (channel == 1) {
CHECK(waveform.rms_samples.size() == 107);
CHECK(waveform.rms_samples[0] == Approx(0.04879f).margin(0.00001));
CHECK(waveform.rms_samples[86] == Approx(0.13578f).margin(0.00001));
CHECK(waveform.rms_samples[87] == Approx(0.0f).margin(0.00001));
}
waveform.clear();
}
// Clean up
r.Close();
}
TEST_CASE( "Extract waveform data sintel", "[libopenshot][audiowaveformer]" )
{
// Create a reader
std::stringstream path;
path << TEST_MEDIA_PATH << "sintel_trailer-720p.mp4";
FFmpegReader r(path.str());
// Create AudioWaveformer and extract a smaller "average" sample set of audio data
AudioWaveformer waveformer(&r);
for (auto channel = 0; channel < r.info.channels; channel++) {
AudioWaveformData waveform = waveformer.ExtractSamples(channel, 20, false);
if (channel == 0) {
CHECK(waveform.rms_samples.size() == 1058);
CHECK(waveform.rms_samples[0] == Approx(0.00001f).margin(0.00001));
CHECK(waveform.rms_samples[1037] == Approx(0.00003f).margin(0.00001));
CHECK(waveform.rms_samples[1038] == Approx(0.0f).margin(0.00001));
} else if (channel == 1) {
CHECK(waveform.rms_samples.size() == 1058);
CHECK(waveform.rms_samples[0] == Approx(0.00001f ).margin(0.00001));
CHECK(waveform.rms_samples[1037] == Approx(0.00003f).margin(0.00001));
CHECK(waveform.rms_samples[1038] == Approx(0.0f).margin(0.00001));
}
waveform.clear();
}
// Clean up
r.Close();
}
TEST_CASE( "Extract waveform data sintel (all channels)", "[libopenshot][audiowaveformer]" )
{
// Create a reader
std::stringstream path;
path << TEST_MEDIA_PATH << "sintel_trailer-720p.mp4";
FFmpegReader r(path.str());
// Create AudioWaveformer and extract a smaller "average" sample set of audio data
AudioWaveformer waveformer(&r);
AudioWaveformData waveform = waveformer.ExtractSamples(-1, 20, false);
CHECK(waveform.rms_samples.size() == 1058);
CHECK(waveform.rms_samples[0] == Approx(0.00001f).margin(0.00001));
CHECK(waveform.rms_samples[1037] == Approx(0.00003f).margin(0.00001));
CHECK(waveform.rms_samples[1038] == Approx(0.0f).margin(0.00001));
waveform.clear();
// Clean up
r.Close();
}
TEST_CASE( "Normalize & scale waveform data piano.wav", "[libopenshot][audiowaveformer]" )
{
// Create a reader
std::stringstream path;
path << TEST_MEDIA_PATH << "piano.wav";
FFmpegReader r(path.str());
// Create AudioWaveformer and extract a smaller "average" sample set of audio data
AudioWaveformer waveformer(&r);
for (auto channel = 0; channel < r.info.channels; channel++) {
// Normalize values and scale them between -1 and +1
AudioWaveformData waveform = waveformer.ExtractSamples(channel, 20, true);
if (channel == 0) {
CHECK(waveform.rms_samples.size() == 107);
CHECK(waveform.rms_samples[0] == Approx(0.07524f).margin(0.00001));
CHECK(waveform.rms_samples[35] == Approx(0.20063f).margin(0.00001));
CHECK(waveform.rms_samples[86] == Approx(0.2094f).margin(0.00001));
CHECK(waveform.rms_samples[87] == Approx(0.0f).margin(0.00001));
}
waveform.clear();
}
// Clean up
r.Close();
}
TEST_CASE( "Extract waveform from image (no audio)", "[libopenshot][audiowaveformer]" )
{
// Create a reader
std::stringstream path;
path << TEST_MEDIA_PATH << "front.png";
FFmpegReader r(path.str());
// Create AudioWaveformer and extract a smaller "average" sample set of audio data
AudioWaveformer waveformer(&r);
AudioWaveformData waveform = waveformer.ExtractSamples(-1, 20, false);
CHECK(waveform.rms_samples.size() == 0);
CHECK(waveform.max_samples.size() == 0);
// Clean up
r.Close();
}
TEST_CASE( "AudioWaveformData struct methods", "[libopenshot][audiowaveformer]" )
{
// Create a reader
AudioWaveformData waveform;
// Resize data to 10 elements
waveform.resize(10);
CHECK(waveform.rms_samples.size() == 10);
CHECK(waveform.max_samples.size() == 10);
// Set all values = 1.0
for (auto s = 0; s < waveform.rms_samples.size(); s++) {
waveform.rms_samples[s] = 1.0;
waveform.max_samples[s] = 1.0;
}
CHECK(waveform.rms_samples[0] == Approx(1.0f).margin(0.00001));
CHECK(waveform.rms_samples[9] == Approx(1.0f).margin(0.00001));
CHECK(waveform.max_samples[0] == Approx(1.0f).margin(0.00001));
CHECK(waveform.max_samples[9] == Approx(1.0f).margin(0.00001));
// Scale all values by 2
waveform.scale(10, 2.0);
CHECK(waveform.rms_samples.size() == 10);
CHECK(waveform.max_samples.size() == 10);
CHECK(waveform.rms_samples[0] == Approx(2.0f).margin(0.00001));
CHECK(waveform.rms_samples[9] == Approx(2.0f).margin(0.00001));
CHECK(waveform.max_samples[0] == Approx(2.0f).margin(0.00001));
CHECK(waveform.max_samples[9] == Approx(2.0f).margin(0.00001));
// Zero out all values
waveform.zero(10);
CHECK(waveform.rms_samples.size() == 10);
CHECK(waveform.max_samples.size() == 10);
CHECK(waveform.rms_samples[0] == Approx(0.0f).margin(0.00001));
CHECK(waveform.rms_samples[9] == Approx(0.0f).margin(0.00001));
CHECK(waveform.max_samples[0] == Approx(0.0f).margin(0.00001));
CHECK(waveform.max_samples[9] == Approx(0.0f).margin(0.00001));
// Access vectors and verify size
std::vector<std::vector<float>> vectors = waveform.vectors();
CHECK(vectors.size() == 2);
CHECK(vectors[0].size() == 10);
CHECK(vectors[0].size() == 10);
// Clear and verify internal data is empty
waveform.clear();
CHECK(waveform.rms_samples.size() == 0);
CHECK(waveform.max_samples.size() == 0);
vectors = waveform.vectors();
CHECK(vectors.size() == 2);
CHECK(vectors[0].size() == 0);
CHECK(vectors[0].size() == 0);
}
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