1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/compiledtest/TestAudioMixer.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,156 @@
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 file,
1.7 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "AudioMixer.h"
1.10 +#include <assert.h>
1.11 +
1.12 +using mozilla::AudioDataValue;
1.13 +using mozilla::AudioSampleFormat;
1.14 +
1.15 +/* In this test, the different audio stream and channels are always created to
1.16 + * cancel each other. */
1.17 +void MixingDone(AudioDataValue* aData, AudioSampleFormat aFormat, uint32_t aChannels, uint32_t aFrames, uint32_t aSampleRate)
1.18 +{
1.19 + bool silent = true;
1.20 + for (uint32_t i = 0; i < aChannels * aFrames; i++) {
1.21 + if (aData[i] != 0.0) {
1.22 + if (aFormat == mozilla::AUDIO_FORMAT_S16) {
1.23 + fprintf(stderr, "Sample at %d is not silent: %d\n", i, (short)aData[i]);
1.24 + } else {
1.25 + fprintf(stderr, "Sample at %d is not silent: %f\n", i, (float)aData[i]);
1.26 + }
1.27 + silent = false;
1.28 + }
1.29 + }
1.30 + if (!silent) {
1.31 + MOZ_CRASH();
1.32 + }
1.33 +}
1.34 +
1.35 +/* Helper function to give us the maximum and minimum value that don't clip,
1.36 + * for a given sample format (integer or floating-point). */
1.37 +template<typename T>
1.38 +T GetLowValue();
1.39 +
1.40 +template<typename T>
1.41 +T GetHighValue();
1.42 +
1.43 +template<>
1.44 +float GetLowValue<float>() {
1.45 + return -1.0;
1.46 +}
1.47 +
1.48 +template<>
1.49 +short GetLowValue<short>() {
1.50 + return -INT16_MAX;
1.51 +}
1.52 +
1.53 +template<>
1.54 +float GetHighValue<float>() {
1.55 + return 1.0;
1.56 +}
1.57 +
1.58 +template<>
1.59 +short GetHighValue<short>() {
1.60 + return INT16_MAX;
1.61 +}
1.62 +
1.63 +void FillBuffer(AudioDataValue* aBuffer, uint32_t aLength, AudioDataValue aValue)
1.64 +{
1.65 + AudioDataValue* end = aBuffer + aLength;
1.66 + while (aBuffer != end) {
1.67 + *aBuffer++ = aValue;
1.68 + }
1.69 +}
1.70 +
1.71 +int main(int argc, char* argv[]) {
1.72 + const uint32_t CHANNEL_LENGTH = 256;
1.73 + const uint32_t AUDIO_RATE = 44100;
1.74 + AudioDataValue a[CHANNEL_LENGTH * 2];
1.75 + AudioDataValue b[CHANNEL_LENGTH * 2];
1.76 + FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
1.77 + FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
1.78 + FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
1.79 + FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
1.80 +
1.81 + {
1.82 + int iterations = 2;
1.83 + mozilla::AudioMixer mixer(MixingDone);
1.84 +
1.85 + fprintf(stderr, "Test AudioMixer constant buffer length.\n");
1.86 +
1.87 + while (iterations--) {
1.88 + mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.89 + mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.90 + mixer.FinishMixing();
1.91 + }
1.92 + }
1.93 +
1.94 + {
1.95 + mozilla::AudioMixer mixer(MixingDone);
1.96 +
1.97 + fprintf(stderr, "Test AudioMixer variable buffer length.\n");
1.98 +
1.99 + FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
1.100 + FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
1.101 + FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
1.102 + FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
1.103 + mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
1.104 + mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
1.105 + mixer.FinishMixing();
1.106 + FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
1.107 + FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
1.108 + FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
1.109 + FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
1.110 + mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.111 + mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.112 + mixer.FinishMixing();
1.113 + FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
1.114 + FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
1.115 + FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
1.116 + FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
1.117 + mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
1.118 + mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
1.119 + mixer.FinishMixing();
1.120 + }
1.121 +
1.122 + FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
1.123 + FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
1.124 +
1.125 + {
1.126 + mozilla::AudioMixer mixer(MixingDone);
1.127 + fprintf(stderr, "Test AudioMixer variable channel count.\n");
1.128 +
1.129 + mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
1.130 + mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
1.131 + mixer.FinishMixing();
1.132 + mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
1.133 + mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
1.134 + mixer.FinishMixing();
1.135 + mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
1.136 + mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
1.137 + mixer.FinishMixing();
1.138 + }
1.139 +
1.140 + {
1.141 + mozilla::AudioMixer mixer(MixingDone);
1.142 + fprintf(stderr, "Test AudioMixer variable stream count.\n");
1.143 +
1.144 + mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.145 + mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.146 + mixer.FinishMixing();
1.147 + mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.148 + mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.149 + mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.150 + mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.151 + mixer.FinishMixing();
1.152 + mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.153 + mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
1.154 + mixer.FinishMixing();
1.155 + }
1.156 +
1.157 + return 0;
1.158 +}
1.159 +
