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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "MediaData.h"
#include "gtest/gtest.h"
using mozilla::AlignedFloatBuffer;
using mozilla::AudioDataValue;
using mozilla::FloatToAudioSample;
using mozilla::InflatableShortBuffer;
void FillSine(InflatableShortBuffer& aBuf, AlignedFloatBuffer& aFloatBuf) {
// Write a constant-pitch sine wave in both the integer and float buffers.
float phase = 0;
float phaseIncrement = 2 * M_PI * 440. / 44100.f;
for (uint32_t i = 0; i < aBuf.Length(); i++) {
aBuf.get()[i] = FloatToAudioSample<int16_t>(sin(phase));
aFloatBuf.get()[i] = sin(phase);
phase += phaseIncrement;
if (phase >= 2 * M_PI) {
phase -= 2 * M_PI;
}
}
}
TEST(InflatableAudioBuffer, Test)
{
for (uint32_t i = 1; i < 10000; i++) {
InflatableShortBuffer buf(i);
AlignedFloatBuffer bufFloat(i);
FillSine(buf, bufFloat);
AlignedFloatBuffer inflated = buf.Inflate();
for (uint32_t j = 0; j < buf.Length(); j++) {
// Accept a very small difference because floats are floored in the
// conversion to integer.
if (std::abs(bufFloat.get()[j] - inflated.get()[j]) * 32767. > 1.0) {
fprintf(stderr, "%f != %f (size: %u, index: %u)\n", bufFloat.get()[j],
inflated.get()[j], i, j);
ASSERT_TRUE(false);
}
}
}
} // namespace audio_mixer
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