1 /* 2 * Copyright (C) 2010 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 android.media; 18 19 import java.util.List; 20 import java.util.ArrayList; 21 22 /** 23 * {@hide} 24 * 25 * The DecoderCapabilities class is used to retrieve the types of the 26 * video and audio decoder(s) supported on a specific Android platform. 27 */ 28 public class DecoderCapabilities 29 { 30 /** 31 * The VideoDecoder class represents the type of a video decoder 32 * 33 */ 34 public enum VideoDecoder { 35 VIDEO_DECODER_WMV, 36 }; 37 38 /** 39 * The AudioDecoder class represents the type of an audio decoder 40 */ 41 public enum AudioDecoder { 42 AUDIO_DECODER_WMA, 43 }; 44 45 static { 46 System.loadLibrary("media_jni"); 47 native_init(); 48 } 49 50 /** 51 * Returns the list of video decoder types 52 * @see android.media.DecoderCapabilities.VideoDecoder 53 */ 54 public static List<VideoDecoder> getVideoDecoders() { 55 List<VideoDecoder> decoderList = new ArrayList<VideoDecoder>(); 56 int nDecoders = native_get_num_video_decoders(); 57 for (int i = 0; i < nDecoders; ++i) { 58 decoderList.add(VideoDecoder.values()[native_get_video_decoder_type(i)]); 59 } 60 return decoderList; 61 } 62 63 /** 64 * Returns the list of audio decoder types 65 * @see android.media.DecoderCapabilities.AudioDecoder 66 */ 67 public static List<AudioDecoder> getAudioDecoders() { 68 List<AudioDecoder> decoderList = new ArrayList<AudioDecoder>(); 69 int nDecoders = native_get_num_audio_decoders(); 70 for (int i = 0; i < nDecoders; ++i) { 71 decoderList.add(AudioDecoder.values()[native_get_audio_decoder_type(i)]); 72 } 73 return decoderList; 74 } 75 76 private DecoderCapabilities() {} // Don't call me 77 78 // Implemented by JNI 79 private static native final void native_init(); 80 private static native final int native_get_num_video_decoders(); 81 private static native final int native_get_video_decoder_type(int index); 82 private static native final int native_get_num_audio_decoders(); 83 private static native final int native_get_audio_decoder_type(int index); 84 } 85
