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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 "gtest/gtest.h"
#include "OpusTrackEncoder.h"
using namespace mozilla;
class TestOpusTrackEncoder : public OpusTrackEncoder
{
public:
// Return true if it has successfully initialized the Opus encoder.
bool TestOpusCreation(int aChannels, int aSamplingRate)
{
if (Init(aChannels, aSamplingRate) == NS_OK) {
if (GetPacketDuration()) {
return true;
}
}
return false;
}
// Return the sample rate of data to be fed to the Opus encoder, could be
// re-sampled if it was not one of the Opus supported sampling rates.
// Init() is expected to be called first.
int TestGetOutputSampleRate()
{
return mInitialized ? GetOutputSampleRate() : 0;
}
};
static bool
TestOpusInit(int aChannels, int aSamplingRate)
{
TestOpusTrackEncoder encoder;
return encoder.TestOpusCreation(aChannels, aSamplingRate);
}
static int
TestOpusResampler(int aChannels, int aSamplingRate)
{
TestOpusTrackEncoder encoder;
EXPECT_TRUE(encoder.TestOpusCreation(aChannels, aSamplingRate));
return encoder.TestGetOutputSampleRate();
}
TEST(Media, OpusEncoder_Init)
{
// Expect false with 0 or negative channels of input signal.
EXPECT_FALSE(TestOpusInit(0, 16000));
EXPECT_FALSE(TestOpusInit(-1, 16000));
// The Opus format supports up to 8 channels, and supports multitrack audio up
// to 255 channels, but the current implementation supports only mono and
// stereo, and downmixes any more than that.
// Expect false with channels of input signal exceed the max supported number.
EXPECT_FALSE(TestOpusInit(8 + 1, 16000));
// Should accept channels within valid range.
for (int i = 1; i <= 8; i++) {
EXPECT_TRUE(TestOpusInit(i, 16000));
}
// Expect false with 0 or negative sampling rate of input signal.
EXPECT_FALSE(TestOpusInit(1, 0));
EXPECT_FALSE(TestOpusInit(1, -1));
// Verify sample rate bounds checking.
EXPECT_FALSE(TestOpusInit(2, 2000));
EXPECT_FALSE(TestOpusInit(2, 4000));
EXPECT_FALSE(TestOpusInit(2, 7999));
EXPECT_TRUE(TestOpusInit(2, 8000));
EXPECT_TRUE(TestOpusInit(2, 192000));
EXPECT_FALSE(TestOpusInit(2, 192001));
EXPECT_FALSE(TestOpusInit(2, 200000));
}
TEST(Media, OpusEncoder_Resample)
{
// Sampling rates of data to be fed to Opus encoder, should remain unchanged
// if it is one of Opus supported rates (8000, 12000, 16000, 24000 and 48000
// (kHz)) at initialization.
EXPECT_TRUE(TestOpusResampler(1, 8000) == 8000);
EXPECT_TRUE(TestOpusResampler(1, 12000) == 12000);
EXPECT_TRUE(TestOpusResampler(1, 16000) == 16000);
EXPECT_TRUE(TestOpusResampler(1, 24000) == 24000);
EXPECT_TRUE(TestOpusResampler(1, 48000) == 48000);
// Otherwise, it should be resampled to 48kHz by resampler.
EXPECT_FALSE(TestOpusResampler(1, 9600) == 9600);
EXPECT_FALSE(TestOpusResampler(1, 44100) == 44100);
}
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