1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.cts.verifier.audio.audiolib; 18 19 /** 20 * An interface for objects which provide streamed audio data to a StreamPlayer instance. 21 */ 22 public interface AudioFiller { 23 /** 24 * Reset a stream to the beginning. 25 */ 26 public void reset(); 27 28 /** 29 * Process a request for audio data. 30 * @param buffer The buffer to be filled. 31 * @param numFrames The number of frames of audio to provide. 32 * @param numChans The number of channels (in the buffer) required by the player. 33 * @return The number of frames actually generated. If this value is less than that 34 * requested, it may be interpreted by the player as the end of playback. 35 */ 36 public int fill(float[] buffer, int numFrames, int numChans); 37 } 38