| /* |
| * Copyright 2020 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. |
| */ |
| |
| #include <jni.h> |
| #include "AudioSource.h" |
| |
| //TODO - Probably wrap the JNI handling in a class with a pointer held in the Java Object |
| // so as to support multiple instances... maybe. |
| |
| // JNI Stuff |
| static float* sAudioBuffer; |
| |
| extern "C" { |
| |
| JNIEXPORT void JNICALL |
| Java_org_hyphonate_megaaudio_player_NativeAudioSource_initN( |
| JNIEnv *env, jobject thiz, jlong native_source_ptr, jint num_frames, jint num_chans) { |
| sAudioBuffer = new float[num_frames * num_chans]; |
| } |
| |
| JNIEXPORT void JNICALL |
| Java_org_hyphonate_megaaudio_player_NativeAudioSource_resetN( |
| JNIEnv *env, jobject thiz, jlong native_source_ptr) { |
| // TODO: implement reset() |
| } |
| |
| JNIEXPORT jint JNICALL |
| Java_org_hyphonate_megaaudio_player_NativeAudioSource_pullN( |
| JNIEnv *env, jobject thiz, jlong native_source_ptr, |
| jfloatArray audio_data, jint num_frames, jint num_chans) { |
| AudioSource* audioSource = (AudioSource*)native_source_ptr; |
| int numFrames = audioSource->pull(sAudioBuffer, num_frames, num_chans); |
| |
| // Convert to Java float[] |
| env->SetFloatArrayRegion(audio_data, 0, numFrames * num_chans, sAudioBuffer); |
| |
| return numFrames; |
| } |
| |
| } // extern "C" |