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Diffstat (limited to 'media/jni/android_media_MediaDataSource.h')
-rw-r--r-- | media/jni/android_media_MediaDataSource.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/media/jni/android_media_MediaDataSource.h b/media/jni/android_media_MediaDataSource.h new file mode 100644 index 0000000..2bc237e --- /dev/null +++ b/media/jni/android_media_MediaDataSource.h @@ -0,0 +1,73 @@ +/* + * Copyright 2015, 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. + */ + +#ifndef _ANDROID_MEDIA_MEDIADATASOURCE_H_ +#define _ANDROID_MEDIA_MEDIADATASOURCE_H_ + +#include "jni.h" + +#include <media/IDataSource.h> +#include <media/stagefright/foundation/ABase.h> +#include <utils/Errors.h> +#include <utils/Mutex.h> + +namespace android { + +// The native counterpart to a Java android.media.MediaDataSource. It inherits from +// IDataSource so that it can be accessed remotely. +// +// If the java DataSource returns an error or throws an exception it +// will be considered to be in a broken state, and the only further call this +// will make is to close(). +class JMediaDataSource : public BnDataSource { +public: + enum { + kBufferSize = 64 * 1024, + }; + + JMediaDataSource(JNIEnv *env, jobject source); + virtual ~JMediaDataSource(); + + virtual sp<IMemory> getIMemory(); + virtual ssize_t readAt(off64_t offset, size_t size); + virtual status_t getSize(off64_t* size); + virtual void close(); + +private: + // Protect all member variables with mLock because this object will be + // accessed on different binder worker threads. + Mutex mLock; + + // The status of the java DataSource. Set to OK unless an error occurred or + // close() was called. + status_t mJavaObjStatus; + // Only call the java getSize() once so the app can't change the size on us. + bool mSizeIsCached; + off64_t mCachedSize; + sp<IMemory> mMemory; + + jobject mMediaDataSourceObj; + jmethodID mReadMethod; + jmethodID mGetSizeMethod; + jmethodID mCloseMethod; + jbyteArray mByteArrayObj; + + DISALLOW_EVIL_CONSTRUCTORS(JMediaDataSource); +}; + +} // namespace android + +#endif // _ANDROID_MEDIA_MEDIADATASOURCE_H_ |