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) \
25JNIEXPORT y JNICALL \
26Java_com_android_ex_variablespeed_VariableSpeedNative_##x
27
28class MethodLog {
29 public:
30  explicit MethodLog(const char* name) : name_(name) {
31    LOGV("+ %s", name);
32  }
33  virtual ~MethodLog() {
34    LOGV("- %s", name_);
35  }
36
37 private:
38  const char* name_;
39};
40
41extern "C" {
42JNI_METHOD(playFileDescriptor, void) (JNIEnv*, jclass, jint fd, jlong offset,
43    jlong length) {
44  MethodLog _("playFileDescriptor");
45  AudioEngine::GetEngine()->PlayFileDescriptor(fd, offset, length);
46}
47
48JNI_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
55JNI_METHOD(setVariableSpeed, void) (JNIEnv*, jclass, jfloat speed) {
56  MethodLog _("setVariableSpeed");
57  AudioEngine::GetEngine()->SetVariableSpeed(speed);
58}
59
60JNI_METHOD(startPlayback, void) (JNIEnv*, jclass) {
61  MethodLog _("startPlayback");
62  AudioEngine::GetEngine()->RequestStart();
63}
64
65JNI_METHOD(stopPlayback, void) (JNIEnv*, jclass) {
66  MethodLog _("stopPlayback");
67  AudioEngine::GetEngine()->RequestStop();
68}
69
70JNI_METHOD(getCurrentPosition, jint) (JNIEnv*, jclass) {
71  return AudioEngine::GetEngine()->GetCurrentPosition();
72}
73
74JNI_METHOD(getTotalDuration, jint) (JNIEnv*, jclass) {
75  return AudioEngine::GetEngine()->GetTotalDuration();
76}
77
78JNI_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
92JNI_METHOD(shutdownEngine, void) (JNIEnv*, jclass) {
93  MethodLog _("shutdownEngine");
94  AudioEngine::DeleteEngine();
95}
96}  // extern "C"
97