1 /*
2 * Copyright (C) 2011 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 #include <stdlib.h>
18 #include <assert.h>
19
20 #include <jni.h>
21 #include <variablespeed.h>
22
23 // Quick #define to make sure I get all the JNI method calls right.
24 #define JNI_METHOD(x, y) \
25 JNIEXPORT y JNICALL \
26 Java_com_android_ex_variablespeed_VariableSpeedNative_##x
27
28 class MethodLog {
29 public:
MethodLog(const char * name)30 explicit MethodLog(const char* name) : name_(name) {
31 LOGV("+ %s", name);
32 }
~MethodLog()33 virtual ~MethodLog() {
34 LOGV("- %s", name_);
35 }
36
37 private:
38 const char* name_;
39 };
40
41 extern "C" {
JNI_METHOD(playFileDescriptor,void)42 JNI_METHOD(playFileDescriptor, void) (JNIEnv*, jclass, jint fd, jlong offset,
43 jlong length) {
44 MethodLog _("playFileDescriptor");
45 AudioEngine::GetEngine()->PlayFileDescriptor(fd, offset, length);
46 }
47
JNI_METHOD(playUri,void)48 JNI_METHOD(playUri, void) (JNIEnv* env, jclass, jstring uri) {
49 MethodLog _("playUri");
50 const char* utf8 = env->GetStringUTFChars(uri, NULL);
51 CHECK(NULL != utf8);
52 AudioEngine::GetEngine()->PlayUri(utf8);
53 }
54
JNI_METHOD(setVariableSpeed,void)55 JNI_METHOD(setVariableSpeed, void) (JNIEnv*, jclass, jfloat speed) {
56 MethodLog _("setVariableSpeed");
57 AudioEngine::GetEngine()->SetVariableSpeed(speed);
58 }
59
JNI_METHOD(startPlayback,void)60 JNI_METHOD(startPlayback, void) (JNIEnv*, jclass) {
61 MethodLog _("startPlayback");
62 AudioEngine::GetEngine()->RequestStart();
63 }
64
JNI_METHOD(stopPlayback,void)65 JNI_METHOD(stopPlayback, void) (JNIEnv*, jclass) {
66 MethodLog _("stopPlayback");
67 AudioEngine::GetEngine()->RequestStop();
68 }
69
JNI_METHOD(getCurrentPosition,jint)70 JNI_METHOD(getCurrentPosition, jint) (JNIEnv*, jclass) {
71 return AudioEngine::GetEngine()->GetCurrentPosition();
72 }
73
JNI_METHOD(getTotalDuration,jint)74 JNI_METHOD(getTotalDuration, jint) (JNIEnv*, jclass) {
75 return AudioEngine::GetEngine()->GetTotalDuration();
76 }
77
JNI_METHOD(initializeEngine,void)78 JNI_METHOD(initializeEngine, void) (JNIEnv*, jclass,
79 jint targetFrames, jfloat windowDuration,
80 jfloat windowOverlapDuration, jint maxPlayBufferCount,
81 jfloat initialRate, jint decodeInitialSize, jint decodeMaxSize,
82 jint startPositionMillis, jint audioStreamType) {
83 MethodLog _("initializeEngine");
84 AudioEngine *engine = new AudioEngine(targetFrames,
85 windowDuration, windowOverlapDuration, maxPlayBufferCount, initialRate,
86 decodeInitialSize, decodeMaxSize, startPositionMillis, audioStreamType);
87 if (!AudioEngine::CompareAndSetEngine(NULL, engine)) {
88 delete engine;
89 }
90 }
91
JNI_METHOD(shutdownEngine,void)92 JNI_METHOD(shutdownEngine, void) (JNIEnv*, jclass) {
93 MethodLog _("shutdownEngine");
94 AudioEngine::DeleteEngine();
95 }
96 } // extern "C"
97