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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.media;
import android.os.Parcel;
import android.os.Parcelable;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.mozilla.gecko.annotation.WrapForJNI;
import org.mozilla.gecko.mozglue.SharedMemory;
public final class SampleBuffer implements Parcelable {
private SharedMemory mSharedMem;
/* package */
public SampleBuffer(final SharedMemory sharedMem) {
mSharedMem = sharedMem;
}
protected SampleBuffer(final Parcel in) {
mSharedMem = in.readParcelable(SampleBuffer.class.getClassLoader());
}
@Override
public void writeToParcel(final Parcel dest, final int flags) {
dest.writeParcelable(mSharedMem, flags);
}
@Override
public int describeContents() {
return 0;
}
public static final Creator<SampleBuffer> CREATOR =
new Creator<SampleBuffer>() {
@Override
public SampleBuffer createFromParcel(final Parcel in) {
return new SampleBuffer(in);
}
@Override
public SampleBuffer[] newArray(final int size) {
return new SampleBuffer[size];
}
};
public int capacity() {
return mSharedMem != null ? mSharedMem.getSize() : 0;
}
public void readFromByteBuffer(final ByteBuffer src, final int offset, final int size)
throws IOException {
if (!src.isDirect()) {
throw new IOException("SharedMemBuffer only support reading from direct byte buffer.");
}
try {
nativeReadFromDirectBuffer(src, mSharedMem.getPointer(), offset, size);
mSharedMem.flush();
} catch (final NullPointerException e) {
throw new IOException(e);
}
}
private static native void nativeReadFromDirectBuffer(
ByteBuffer src, long dest, int offset, int size);
@WrapForJNI
public void writeToByteBuffer(final ByteBuffer dest, final int offset, final int size)
throws IOException {
if (!dest.isDirect()) {
throw new IOException("SharedMemBuffer only support writing to direct byte buffer.");
}
try {
nativeWriteToDirectBuffer(mSharedMem.getPointer(), dest, offset, size);
} catch (final NullPointerException e) {
throw new IOException(e);
}
}
private static native void nativeWriteToDirectBuffer(
long src, ByteBuffer dest, int offset, int size);
public void dispose() {
if (mSharedMem != null) {
mSharedMem.dispose();
mSharedMem = null;
}
}
@WrapForJNI
public boolean isValid() {
return mSharedMem != null;
}
@Override
public String toString() {
return "Buffer: " + mSharedMem;
}
}
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