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