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 android.compat.annotation.UnsupportedAppUsage; 20 21 import java.util.ArrayList; 22 import java.util.List; 23 24 /** 25 * {@hide} 26 * 27 * The DecoderCapabilities class is used to retrieve the types of the 28 * video and audio decoder(s) supported on a specific Android platform. 29 */ 30 public class DecoderCapabilities 31 { 32 /** 33 * The VideoDecoder class represents the type of a video decoder 34 * 35 */ 36 public enum VideoDecoder { 37 @UnsupportedAppUsage 38 VIDEO_DECODER_WMV, 39 }; 40 41 /** 42 * The AudioDecoder class represents the type of an audio decoder 43 */ 44 public enum AudioDecoder { 45 @UnsupportedAppUsage 46 AUDIO_DECODER_WMA, 47 }; 48 49 static { 50 System.loadLibrary("media_jni"); native_init()51 native_init(); 52 } 53 54 /** 55 * Returns the list of video decoder types 56 * @see android.media.DecoderCapabilities.VideoDecoder 57 */ 58 @UnsupportedAppUsage getVideoDecoders()59 public static List<VideoDecoder> getVideoDecoders() { 60 List<VideoDecoder> decoderList = new ArrayList<VideoDecoder>(); 61 int nDecoders = native_get_num_video_decoders(); 62 for (int i = 0; i < nDecoders; ++i) { 63 decoderList.add(VideoDecoder.values()[native_get_video_decoder_type(i)]); 64 } 65 return decoderList; 66 } 67 68 /** 69 * Returns the list of audio decoder types 70 * @see android.media.DecoderCapabilities.AudioDecoder 71 */ 72 @UnsupportedAppUsage getAudioDecoders()73 public static List<AudioDecoder> getAudioDecoders() { 74 List<AudioDecoder> decoderList = new ArrayList<AudioDecoder>(); 75 int nDecoders = native_get_num_audio_decoders(); 76 for (int i = 0; i < nDecoders; ++i) { 77 decoderList.add(AudioDecoder.values()[native_get_audio_decoder_type(i)]); 78 } 79 return decoderList; 80 } 81 DecoderCapabilities()82 private DecoderCapabilities() {} // Don't call me 83 84 // Implemented by JNI native_init()85 private static native final void native_init(); native_get_num_video_decoders()86 private static native final int native_get_num_video_decoders(); native_get_video_decoder_type(int index)87 private static native final int native_get_video_decoder_type(int index); native_get_num_audio_decoders()88 private static native final int native_get_num_audio_decoders(); native_get_audio_decoder_type(int index)89 private static native final int native_get_audio_decoder_type(int index); 90 } 91