The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/content/media/gtest/TestTrackEncoder.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,85 @@
     1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +#include "gtest/gtest.h"
    1.10 +#include "OpusTrackEncoder.h"
    1.11 +
    1.12 +using namespace mozilla;
    1.13 +
    1.14 +class TestOpusTrackEncoder : public OpusTrackEncoder
    1.15 +{
    1.16 +public:
    1.17 +  // Return true if it has successfully initialized the Opus encoder.
    1.18 +  bool TestOpusCreation(int aChannels, int aSamplingRate)
    1.19 +  {
    1.20 +    if (Init(aChannels, aSamplingRate) == NS_OK) {
    1.21 +      if (GetPacketDuration()) {
    1.22 +        return true;
    1.23 +      }
    1.24 +    }
    1.25 +    return false;
    1.26 +  }
    1.27 +
    1.28 +  // Return the sample rate of data to be fed to the Opus encoder, could be
    1.29 +  // re-sampled if it was not one of the Opus supported sampling rates.
    1.30 +  // Init() is expected to be called first.
    1.31 +  int TestGetOutputSampleRate()
    1.32 +  {
    1.33 +    return mInitialized ? GetOutputSampleRate() : 0;
    1.34 +  }
    1.35 +};
    1.36 +
    1.37 +static bool
    1.38 +TestOpusInit(int aChannels, int aSamplingRate)
    1.39 +{
    1.40 +  TestOpusTrackEncoder encoder;
    1.41 +  return encoder.TestOpusCreation(aChannels, aSamplingRate);
    1.42 +}
    1.43 +
    1.44 +static int
    1.45 +TestOpusResampler(int aChannels, int aSamplingRate)
    1.46 +{
    1.47 +  TestOpusTrackEncoder encoder;
    1.48 +  EXPECT_TRUE(encoder.TestOpusCreation(aChannels, aSamplingRate));
    1.49 +  return encoder.TestGetOutputSampleRate();
    1.50 +}
    1.51 +
    1.52 +TEST(Media, OpusEncoder_Init)
    1.53 +{
    1.54 +  // Expect false with 0 or negative channels of input signal.
    1.55 +  EXPECT_FALSE(TestOpusInit(0, 16000));
    1.56 +  EXPECT_FALSE(TestOpusInit(-1, 16000));
    1.57 +
    1.58 +  // The Opus format supports up to 8 channels, and supports multitrack audio up
    1.59 +  // to 255 channels, but the current implementation supports only mono and
    1.60 +  // stereo, and downmixes any more than that.
    1.61 +  // Expect false with channels of input signal exceed the max supported number.
    1.62 +  EXPECT_FALSE(TestOpusInit(8 + 1, 16000));
    1.63 +
    1.64 +  // Should accept channels within valid range.
    1.65 +  for (int i = 1; i <= 8; i++) {
    1.66 +    EXPECT_TRUE(TestOpusInit(i, 16000));
    1.67 +  }
    1.68 +
    1.69 +  // Expect false with 0 or negative sampling rate of input signal.
    1.70 +  EXPECT_FALSE(TestOpusInit(1, 0));
    1.71 +  EXPECT_FALSE(TestOpusInit(1, -1));
    1.72 +}
    1.73 +
    1.74 +TEST(Media, OpusEncoder_Resample)
    1.75 +{
    1.76 +  // Sampling rates of data to be fed to Opus encoder, should remain unchanged
    1.77 +  // if it is one of Opus supported rates (8000, 12000, 16000, 24000 and 48000
    1.78 +  // (kHz)) at initialization.
    1.79 +  EXPECT_TRUE(TestOpusResampler(1, 8000) == 8000);
    1.80 +  EXPECT_TRUE(TestOpusResampler(1, 12000) == 12000);
    1.81 +  EXPECT_TRUE(TestOpusResampler(1, 16000) == 16000);
    1.82 +  EXPECT_TRUE(TestOpusResampler(1, 24000) == 24000);
    1.83 +  EXPECT_TRUE(TestOpusResampler(1, 48000) == 48000);
    1.84 +
    1.85 +  // Otherwise, it should be resampled to 48kHz by resampler.
    1.86 +  EXPECT_FALSE(TestOpusResampler(1, 9600) == 9600);
    1.87 +  EXPECT_FALSE(TestOpusResampler(1, 44100) == 44100);
    1.88 +}