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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drrickorang.loopback;
/**
* This file stores constants that are used across multiple files.
*/
public class Constant {
public static final double TWO_PI = 2.0 * Math.PI;
public static final long NANOS_PER_MILLI = 1000000;
public static final int MILLIS_PER_SECOND = 1000;
public static final int SECONDS_PER_HOUR = 3600;
public static final int LOOPBACK_PLUG_AUDIO_THREAD_TEST_TYPE_LATENCY = 222;
public static final int LOOPBACK_PLUG_AUDIO_THREAD_TEST_TYPE_BUFFER_PERIOD = 223;
public static final int AUDIO_THREAD_TYPE_JAVA = 0;
public static final int AUDIO_THREAD_TYPE_NATIVE = 1;
public static final int BYTES_PER_SHORT = 2;
public static final int SHORTS_PER_INT = 2;
public static final int BYTES_PER_FRAME = 2; // bytes per sample
// prime numbers that don't overlap with FFT frequencies
public static final double PRIME_FREQUENCY_1 = 703.0;
public static final double PRIME_FREQUENCY_2 = 719.0;
// amplitude for ToneGeneration
public static final double SINE_WAVE_AMPLITUDE = 0.8;
public static final double TWO_SINE_WAVES_AMPLITUDE = 0.4;
// the number used to configured PipeShort/PipeByteBuffer
public static final int MAX_SHORTS = 65536;
// used to identify a variable is currently unknown
public static final int UNKNOWN = -1;
// used when joining a thread
public static final int JOIN_WAIT_TIME_MS = 1000;
// Loopback on Java thread test audio tone constants
public static final int LOOPBACK_SAMPLE_FRAMES = 300;
public static final double LOOPBACK_AMPLITUDE = 0.95;
public static final int LOOPBACK_FREQUENCY = 4000;
// Settings Activity and ADB constants
public static final int SAMPLING_RATE_MAX = 48000;
public static final int SAMPLING_RATE_MIN = 8000;
public static final int PLAYER_BUFFER_FRAMES_MAX = 8000;
public static final int PLAYER_BUFFER_FRAMES_MIN = 16;
public static final int RECORDER_BUFFER_FRAMES_MAX = 8000;
public static final int RECORDER_BUFFER_FRAMES_MIN = 16;
public static final int BUFFER_TEST_DURATION_SECONDS_MAX = 36000;
public static final int BUFFER_TEST_DURATION_SECONDS_MIN = 1;
public static final int BUFFER_TEST_WAVE_PLOT_DURATION_SECONDS_MAX = 120;
public static final int BUFFER_TEST_WAVE_PLOT_DURATION_SECONDS_MIN = 1;
public static final int MAX_NUM_LOAD_THREADS = 20;
public static final int MIN_NUM_LOAD_THREADS = 0;
}
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