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ggwave : more resampling fixes

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This time the sound cracking should be fixed for real.

Also adding option to generate noise in the cpp tests
This commit is contained in:
Georgi Gerganov
2021-02-21 10:30:43 +02:00
parent 311442f01c
commit 553b414929
6 changed files with 179 additions and 56 deletions
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42
tests/test-ggwave.cpp
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@@ -8,6 +8,8 @@
#include <vector>
#include <set>
float frand() { return float(rand()%RAND_MAX)/RAND_MAX; }
#define CHECK(cond) \
if (!(cond)) { \
fprintf(stderr, "[%s:%d] Check failed: %s\n", __FILE__, __LINE__, #cond); \
@@ -145,7 +147,42 @@ int main(int argc, char ** argv) {
};
} break;
};
};
auto addNoiseHelper = [&](float level, GGWave::SampleFormat format) {
switch (format) {
case GGWAVE_SAMPLE_FORMAT_UNDEFINED: CHECK(false); break;
case GGWAVE_SAMPLE_FORMAT_U8:
{
for (auto & s : bufferU8) {
s = std::max(0.0f, std::min(255.0f, (float) s + (frand() - 0.5f)*(level*256)));
}
} break;
case GGWAVE_SAMPLE_FORMAT_I8:
{
for (auto & s : bufferI8) {
s = std::max(-128.0f, std::min(127.0f, (float) s + (frand() - 0.5f)*(level*256)));
}
} break;
case GGWAVE_SAMPLE_FORMAT_U16:
{
for (auto & s : bufferU16) {
s = std::max(0.0f, std::min(65535.0f, (float) s + (frand() - 0.5f)*(level*65536)));
}
} break;
case GGWAVE_SAMPLE_FORMAT_I16:
{
for (auto & s : bufferI16) {
s = std::max(-32768.0f, std::min(32767.0f, (float) s + (frand() - 0.5f)*(level*65536)));
}
} break;
case GGWAVE_SAMPLE_FORMAT_F32:
{
for (auto & s : bufferF32) {
s = std::max(-1.0f, std::min(1.0f, (float) s + (frand() - 0.5f)*(level)));
}
} break;
};
};
uint32_t nSamples = 0;
@@ -194,7 +231,7 @@ int main(int argc, char ** argv) {
printf("Testing: sample rate = %d\n", srInp);
auto parameters = GGWave::getDefaultParameters();
parameters.soundMarkerThreshold = 1.1f;
parameters.soundMarkerThreshold = 3.0f;
std::string payload = "hello123";
@@ -207,7 +244,8 @@ int main(int argc, char ** argv) {
auto expectedSize = instanceOut.encodeSize_samples();
instanceOut.encode(kCBWaveformOut.at(parameters.sampleFormatOut));
printf("Expected = %d, actual = %d\n", expectedSize, nSamples);
CHECK(expectedSize == nSamples);
CHECK(expectedSize >= nSamples);
addNoiseHelper(0.01, parameters.sampleFormatOut); // add some artificial noise
convertHelper(parameters.sampleFormatOut, parameters.sampleFormatInp);
}