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comparison: content/media/compiledtest/TestAudioMixer.cpp
content/media/compiledtest/TestAudioMixer.cpp
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 4 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "AudioMixer.h" | |
| 7 #include <assert.h> | |
| 8 | |
| 9 using mozilla::AudioDataValue; | |
| 10 using mozilla::AudioSampleFormat; | |
| 11 | |
| 12 /* In this test, the different audio stream and channels are always created to | |
| 13 * cancel each other. */ | |
| 14 void MixingDone(AudioDataValue* aData, AudioSampleFormat aFormat, uint32_t aChannels, uint32_t aFrames, uint32_t aSampleRate) | |
| 15 { | |
| 16 bool silent = true; | |
| 17 for (uint32_t i = 0; i < aChannels * aFrames; i++) { | |
| 18 if (aData[i] != 0.0) { | |
| 19 if (aFormat == mozilla::AUDIO_FORMAT_S16) { | |
| 20 fprintf(stderr, "Sample at %d is not silent: %d\n", i, (short)aData[i]); | |
| 21 } else { | |
| 22 fprintf(stderr, "Sample at %d is not silent: %f\n", i, (float)aData[i]); | |
| 23 } | |
| 24 silent = false; | |
| 25 } | |
| 26 } | |
| 27 if (!silent) { | |
| 28 MOZ_CRASH(); | |
| 29 } | |
| 30 } | |
| 31 | |
| 32 /* Helper function to give us the maximum and minimum value that don't clip, | |
| 33 * for a given sample format (integer or floating-point). */ | |
| 34 template<typename T> | |
| 35 T GetLowValue(); | |
| 36 | |
| 37 template<typename T> | |
| 38 T GetHighValue(); | |
| 39 | |
| 40 template<> | |
| 41 float GetLowValue<float>() { | |
| 42 return -1.0; | |
| 43 } | |
| 44 | |
| 45 template<> | |
| 46 short GetLowValue<short>() { | |
| 47 return -INT16_MAX; | |
| 48 } | |
| 49 | |
| 50 template<> | |
| 51 float GetHighValue<float>() { | |
| 52 return 1.0; | |
| 53 } | |
| 54 | |
| 55 template<> | |
| 56 short GetHighValue<short>() { | |
| 57 return INT16_MAX; | |
| 58 } | |
| 59 | |
| 60 void FillBuffer(AudioDataValue* aBuffer, uint32_t aLength, AudioDataValue aValue) | |
| 61 { | |
| 62 AudioDataValue* end = aBuffer + aLength; | |
| 63 while (aBuffer != end) { | |
| 64 *aBuffer++ = aValue; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 int main(int argc, char* argv[]) { | |
| 69 const uint32_t CHANNEL_LENGTH = 256; | |
| 70 const uint32_t AUDIO_RATE = 44100; | |
| 71 AudioDataValue a[CHANNEL_LENGTH * 2]; | |
| 72 AudioDataValue b[CHANNEL_LENGTH * 2]; | |
| 73 FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>()); | |
| 74 FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>()); | |
| 75 FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>()); | |
| 76 FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>()); | |
| 77 | |
| 78 { | |
| 79 int iterations = 2; | |
| 80 mozilla::AudioMixer mixer(MixingDone); | |
| 81 | |
| 82 fprintf(stderr, "Test AudioMixer constant buffer length.\n"); | |
| 83 | |
| 84 while (iterations--) { | |
| 85 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 86 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 87 mixer.FinishMixing(); | |
| 88 } | |
| 89 } | |
| 90 | |
| 91 { | |
| 92 mozilla::AudioMixer mixer(MixingDone); | |
| 93 | |
| 94 fprintf(stderr, "Test AudioMixer variable buffer length.\n"); | |
| 95 | |
| 96 FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>()); | |
| 97 FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>()); | |
| 98 FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>()); | |
| 99 FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>()); | |
| 100 mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE); | |
| 101 mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE); | |
| 102 mixer.FinishMixing(); | |
| 103 FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>()); | |
| 104 FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>()); | |
| 105 FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>()); | |
| 106 FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>()); | |
| 107 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 108 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 109 mixer.FinishMixing(); | |
| 110 FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>()); | |
| 111 FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>()); | |
| 112 FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>()); | |
| 113 FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>()); | |
| 114 mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE); | |
| 115 mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE); | |
| 116 mixer.FinishMixing(); | |
| 117 } | |
| 118 | |
| 119 FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>()); | |
| 120 FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>()); | |
| 121 | |
| 122 { | |
| 123 mozilla::AudioMixer mixer(MixingDone); | |
| 124 fprintf(stderr, "Test AudioMixer variable channel count.\n"); | |
| 125 | |
| 126 mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE); | |
| 127 mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE); | |
| 128 mixer.FinishMixing(); | |
| 129 mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE); | |
| 130 mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE); | |
| 131 mixer.FinishMixing(); | |
| 132 mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE); | |
| 133 mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE); | |
| 134 mixer.FinishMixing(); | |
| 135 } | |
| 136 | |
| 137 { | |
| 138 mozilla::AudioMixer mixer(MixingDone); | |
| 139 fprintf(stderr, "Test AudioMixer variable stream count.\n"); | |
| 140 | |
| 141 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 142 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 143 mixer.FinishMixing(); | |
| 144 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 145 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 146 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 147 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 148 mixer.FinishMixing(); | |
| 149 mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 150 mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE); | |
| 151 mixer.FinishMixing(); | |
| 152 } | |
| 153 | |
| 154 return 0; | |
| 155 } | |
| 156 |
