1 /* 2 * Copyright 2018 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 #ifndef ANDROID_JAUDIOATTRIBUTES_H 18 #define ANDROID_JAUDIOATTRIBUTES_H 19 20 #include <jni.h> 21 #include <system/audio.h> 22 23 namespace android { 24 25 class JAudioAttributes { 26 public: 27 /* Creates a Java AudioAttributes object. */ 28 static jobject createAudioAttributesObj(JNIEnv *env, 29 const audio_attributes_t* pAttributes, 30 audio_stream_type_t streamType) { 31 32 jclass jBuilderCls = env->FindClass("android/media/AudioAttributes$Builder"); 33 jmethodID jBuilderCtor = env->GetMethodID(jBuilderCls, "<init>", "()V"); 34 jobject jBuilderObj = env->NewObject(jBuilderCls, jBuilderCtor); 35 36 if (pAttributes != NULL) { 37 // If pAttributes is not null, streamType is ignored. 38 jmethodID jSetUsage = env->GetMethodID( 39 jBuilderCls, "setUsage", "(I)Landroid/media/AudioAttributes$Builder;"); 40 jBuilderObj = env->CallObjectMethod(jBuilderObj, jSetUsage, pAttributes->usage); 41 42 jmethodID jSetContentType = env->GetMethodID(jBuilderCls, "setContentType", 43 "(I)Landroid/media/AudioAttributes$Builder;"); 44 jBuilderObj = env->CallObjectMethod(jBuilderObj, jSetContentType, 45 pAttributes->content_type); 46 47 // TODO: Java AudioAttributes.Builder.setCapturePreset() is systemApi and hidden. 48 // Can we use this method? 49 // jmethodID jSetCapturePreset = env->GetMethodID(jBuilderCls, "setCapturePreset", 50 // "(I)Landroid/media/AudioAttributes$Builder;"); 51 // jBuilderObj = env->CallObjectMethod(jBuilderObj, jSetCapturePreset, 52 // pAttributes->source); 53 54 jmethodID jSetFlags = env->GetMethodID(jBuilderCls, "setFlags", 55 "(I)Landroid/media/AudioAttributes$Builder;"); 56 jBuilderObj = env->CallObjectMethod(jBuilderObj, jSetFlags, pAttributes->flags); 57 58 // TODO: Handle the 'tags' (char[] to HashSet<String>). 59 // How to parse the char[]? Is there any example of it? 60 // Also, the addTags() method is hidden. 61 } else { 62 // Call AudioAttributes.Builder.setLegacyStreamType().build() 63 jmethodID jSetLegacyStreamType = env->GetMethodID(jBuilderCls, "setLegacyStreamType", 64 "(I)Landroid/media/AudioAttributes$Builder;"); 65 jBuilderObj = env->CallObjectMethod(jBuilderObj, jSetLegacyStreamType, streamType); 66 } 67 68 jmethodID jBuild = env->GetMethodID(jBuilderCls, "build", 69 "()Landroid/media/AudioAttributes;"); 70 return env->CallObjectMethod(jBuilderObj, jBuild); 71 } 72 73 }; 74 75 } // namespace android 76 77 #endif // ANDROID_JAUDIOATTRIBUTES_H 78