michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "AudioMixer.h"
michael@0: #include <assert.h>
michael@0: 
michael@0: using mozilla::AudioDataValue;
michael@0: using mozilla::AudioSampleFormat;
michael@0: 
michael@0: /* In this test, the different audio stream and channels are always created to
michael@0:  * cancel each other. */
michael@0: void MixingDone(AudioDataValue* aData, AudioSampleFormat aFormat, uint32_t aChannels, uint32_t aFrames, uint32_t aSampleRate)
michael@0: {
michael@0:   bool silent = true;
michael@0:   for (uint32_t i = 0; i < aChannels * aFrames; i++) {
michael@0:     if (aData[i] != 0.0) {
michael@0:       if (aFormat == mozilla::AUDIO_FORMAT_S16) {
michael@0:         fprintf(stderr, "Sample at %d is not silent: %d\n", i, (short)aData[i]);
michael@0:       } else {
michael@0:         fprintf(stderr, "Sample at %d is not silent: %f\n", i, (float)aData[i]);
michael@0:       }
michael@0:       silent = false;
michael@0:     }
michael@0:   }
michael@0:   if (!silent) {
michael@0:     MOZ_CRASH();
michael@0:   }
michael@0: }
michael@0: 
michael@0: /* Helper function to give us the maximum and minimum value that don't clip,
michael@0:  * for a given sample format (integer or floating-point). */
michael@0: template<typename T>
michael@0: T GetLowValue();
michael@0: 
michael@0: template<typename T>
michael@0: T GetHighValue();
michael@0: 
michael@0: template<>
michael@0: float GetLowValue<float>() {
michael@0:   return -1.0;
michael@0: }
michael@0: 
michael@0: template<>
michael@0: short GetLowValue<short>() {
michael@0:   return -INT16_MAX;
michael@0: }
michael@0: 
michael@0: template<>
michael@0: float GetHighValue<float>() {
michael@0:   return 1.0;
michael@0: }
michael@0: 
michael@0: template<>
michael@0: short GetHighValue<short>() {
michael@0:   return INT16_MAX;
michael@0: }
michael@0: 
michael@0: void FillBuffer(AudioDataValue* aBuffer, uint32_t aLength, AudioDataValue aValue)
michael@0: {
michael@0:   AudioDataValue* end = aBuffer + aLength;
michael@0:   while (aBuffer != end) {
michael@0:     *aBuffer++ = aValue;
michael@0:   }
michael@0: }
michael@0: 
michael@0: int main(int argc, char* argv[]) {
michael@0:   const uint32_t CHANNEL_LENGTH = 256;
michael@0:   const uint32_t AUDIO_RATE = 44100;
michael@0:   AudioDataValue a[CHANNEL_LENGTH * 2];
michael@0:   AudioDataValue b[CHANNEL_LENGTH * 2];
michael@0:   FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
michael@0:   FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
michael@0:   FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
michael@0:   FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
michael@0: 
michael@0:   {
michael@0:     int iterations = 2;
michael@0:     mozilla::AudioMixer mixer(MixingDone);
michael@0: 
michael@0:     fprintf(stderr, "Test AudioMixer constant buffer length.\n");
michael@0: 
michael@0:     while (iterations--) {
michael@0:       mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:       mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:       mixer.FinishMixing();
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   {
michael@0:     mozilla::AudioMixer mixer(MixingDone);
michael@0: 
michael@0:     fprintf(stderr, "Test AudioMixer variable buffer length.\n");
michael@0: 
michael@0:     FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
michael@0:     FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
michael@0:     FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
michael@0:     FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:     FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
michael@0:     FillBuffer(a + CHANNEL_LENGTH, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
michael@0:     FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
michael@0:     FillBuffer(b + CHANNEL_LENGTH, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:     FillBuffer(a, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
michael@0:     FillBuffer(a + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetLowValue<AudioDataValue>());
michael@0:     FillBuffer(b, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
michael@0:     FillBuffer(b + CHANNEL_LENGTH / 2, CHANNEL_LENGTH / 2, GetHighValue<AudioDataValue>());
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH / 2, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:   }
michael@0: 
michael@0:   FillBuffer(a, CHANNEL_LENGTH, GetLowValue<AudioDataValue>());
michael@0:   FillBuffer(b, CHANNEL_LENGTH, GetHighValue<AudioDataValue>());
michael@0: 
michael@0:   {
michael@0:     mozilla::AudioMixer mixer(MixingDone);
michael@0:     fprintf(stderr, "Test AudioMixer variable channel count.\n");
michael@0: 
michael@0:     mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:     mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:     mixer.Mix(a, 1, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 1, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:   }
michael@0: 
michael@0:   {
michael@0:     mozilla::AudioMixer mixer(MixingDone);
michael@0:     fprintf(stderr, "Test AudioMixer variable stream count.\n");
michael@0: 
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:     mixer.Mix(a, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.Mix(b, 2, CHANNEL_LENGTH, AUDIO_RATE);
michael@0:     mixer.FinishMixing();
michael@0:   }
michael@0: 
michael@0:   return 0;
michael@0: }
michael@0: