media/java/android/media/AudioFormat.java

/*
 * Copyright (C) 2008 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 android.media;

/**
 * The AudioFormat class is used to access a number of audio format and
 * channel configuration constants. They are for instance used
 * in {@link AudioTrack} and {@link AudioRecord}.
 * 
 */
public class AudioFormat {
    
    //---------------------------------------------------------
    // Constants
    //--------------------
    /** Invalid audio data format */
    public static final int ENCODING_INVALID = 0;
    /** Default audio data format */
    public static final int ENCODING_DEFAULT = 1;
    /** Audio data format: PCM 16 bit per sample */
    public static final int ENCODING_PCM_16BIT = 2; // accessed by native code
    /** Audio data format: PCM 8 bit per sample */
    public static final int ENCODING_PCM_8BIT = 3;  // accessed by native code

    /** Invalid audio channel configuration */
    /** @deprecated use CHANNEL_INVALID instead  */
    @Deprecated    public static final int CHANNEL_CONFIGURATION_INVALID   = 0;
    /** Default audio channel configuration */
    /** @deprecated use CHANNEL_OUT_DEFAULT or CHANNEL_IN_DEFAULT instead  */
    @Deprecated    public static final int CHANNEL_CONFIGURATION_DEFAULT   = 1;
    /** Mono audio configuration */
    /** @deprecated use CHANNEL_OUT_MONO or CHANNEL_IN_MONO instead  */
    @Deprecated    public static final int CHANNEL_CONFIGURATION_MONO      = 2;
    /** Stereo (2 channel) audio configuration */
    /** @deprecated use CHANNEL_OUT_STEREO or CHANNEL_IN_STEREO instead  */
    @Deprecated    public static final int CHANNEL_CONFIGURATION_STEREO    = 3;

    /** Invalid audio channel mask */
    public static final int CHANNEL_INVALID = 0;
    /** Default audio channel mask */
    public static final int CHANNEL_OUT_DEFAULT = 1;

    // Channel mask definitions must be kept in sync with native values in include/media/AudioSystem.h
    public static final int CHANNEL_OUT_FRONT_LEFT = 0x4;
    public static final int CHANNEL_OUT_FRONT_RIGHT = 0x8;
    public static final int CHANNEL_OUT_FRONT_CENTER = 0x10;
    public static final int CHANNEL_OUT_LOW_FREQUENCY = 0x20;
    public static final int CHANNEL_OUT_BACK_LEFT = 0x40;
    public static final int CHANNEL_OUT_BACK_RIGHT = 0x80;
    public static final int CHANNEL_OUT_FRONT_LEFT_OF_CENTER = 0x100;
    public static final int CHANNEL_OUT_FRONT_RIGHT_OF_CENTER = 0x200;
    public static final int CHANNEL_OUT_BACK_CENTER = 0x400;
    public static final int CHANNEL_OUT_MONO = CHANNEL_OUT_FRONT_LEFT;
    public static final int CHANNEL_OUT_STEREO = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT);
    public static final int CHANNEL_OUT_QUAD = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
            CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT);
    public static final int CHANNEL_OUT_SURROUND = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
            CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_BACK_CENTER);
    public static final int CHANNEL_OUT_5POINT1 = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
            CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT);
    public static final int CHANNEL_OUT_7POINT1 = (CHANNEL_OUT_FRONT_LEFT | CHANNEL_OUT_FRONT_RIGHT |
            CHANNEL_OUT_FRONT_CENTER | CHANNEL_OUT_LOW_FREQUENCY | CHANNEL_OUT_BACK_LEFT | CHANNEL_OUT_BACK_RIGHT |
            CHANNEL_OUT_FRONT_LEFT_OF_CENTER | CHANNEL_OUT_FRONT_RIGHT_OF_CENTER);

    public static final int CHANNEL_IN_DEFAULT = 1;
    public static final int CHANNEL_IN_LEFT = 0x4;
    public static final int CHANNEL_IN_RIGHT = 0x8;
    public static final int CHANNEL_IN_FRONT = 0x10;
    public static final int CHANNEL_IN_BACK = 0x20;
    public static final int CHANNEL_IN_LEFT_PROCESSED = 0x40;
    public static final int CHANNEL_IN_RIGHT_PROCESSED = 0x80;
    public static final int CHANNEL_IN_FRONT_PROCESSED = 0x100;
    public static final int CHANNEL_IN_BACK_PROCESSED = 0x200;
    public static final int CHANNEL_IN_PRESSURE = 0x400;
    public static final int CHANNEL_IN_X_AXIS = 0x800;
    public static final int CHANNEL_IN_Y_AXIS = 0x1000;
    public static final int CHANNEL_IN_Z_AXIS = 0x2000;
    public static final int CHANNEL_IN_VOICE_UPLINK = 0x4000;
    public static final int CHANNEL_IN_VOICE_DNLINK = 0x8000;
    public static final int CHANNEL_IN_MONO = CHANNEL_IN_FRONT;
    public static final int CHANNEL_IN_STEREO = (CHANNEL_IN_LEFT | CHANNEL_IN_RIGHT);

}