1/*
2 * Copyright 2017, 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_MEDIA_MEDIA2DATASOURCE_H_
18#define _ANDROID_MEDIA_MEDIA2DATASOURCE_H_
19
20#include "jni.h"
21
22#include <media/DataSource.h>
23#include <media/stagefright/foundation/ABase.h>
24#include <utils/Errors.h>
25#include <utils/Mutex.h>
26
27namespace android {
28
29// The native counterpart to a Java android.media.Media2DataSource. It inherits from
30// DataSource.
31//
32// If the java DataSource returns an error or throws an exception it
33// will be considered to be in a broken state, and the only further call this
34// will make is to close().
35class JMedia2DataSource : public DataSource {
36public:
37    JMedia2DataSource(JNIEnv *env, jobject source);
38    virtual ~JMedia2DataSource();
39
40    virtual status_t initCheck() const override;
41    virtual ssize_t readAt(off64_t offset, void *data, size_t size) override;
42    virtual status_t getSize(off64_t *size) override;
43
44    virtual String8 toString() override;
45    virtual String8 getMIMEType() const override;
46    virtual void close() override;
47private:
48    // Protect all member variables with mLock because this object will be
49    // accessed on different threads.
50    Mutex mLock;
51
52    // The status of the java DataSource. Set to OK unless an error occurred or
53    // close() was called.
54    status_t mJavaObjStatus;
55    // Only call the java getSize() once so the app can't change the size on us.
56    bool mSizeIsCached;
57    off64_t mCachedSize;
58
59    jobject mMedia2DataSourceObj;
60    jmethodID mReadAtMethod;
61    jmethodID mGetSizeMethod;
62    jmethodID mCloseMethod;
63    jbyteArray mByteArrayObj;
64
65    DISALLOW_EVIL_CONSTRUCTORS(JMedia2DataSource);
66};
67
68}  // namespace android
69
70#endif  // _ANDROID_MEDIA_MEDIA2DATASOURCE_H_
71