075e9a19ce
For storing pointers, long is used in media classes, as native pointers can be 64-bit. In addition, some minor changes have been done to conform with standard JNI practice (e.g. use of jint instead of int in JNI function prototypes) Change-Id: Idc4ca0124d03df7f9cef412488abafd020e5e774 Signed-off-by: Ashok Bhat <ashok.bhat@arm.com> Signed-off-by: Marcus Oakland <marcus.oakland@arm.com> Signed-off-by: Kévin PETIT <kevin.petit@arm.com>
93 lines
2.9 KiB
Java
93 lines
2.9 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.media;
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import android.media.MediaCryptoException;
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import java.util.UUID;
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/**
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* MediaCrypto class can be used in conjunction with {@link android.media.MediaCodec}
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* to decode encrypted media data.
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*
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* Crypto schemes are assigned 16 byte UUIDs,
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* the method {@link #isCryptoSchemeSupported} can be used to query if a given
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* scheme is supported on the device.
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*
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*/
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public final class MediaCrypto {
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/**
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* Query if the given scheme identified by its UUID is supported on
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* this device.
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* @param uuid The UUID of the crypto scheme.
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*/
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public static final boolean isCryptoSchemeSupported(UUID uuid) {
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return isCryptoSchemeSupportedNative(getByteArrayFromUUID(uuid));
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}
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private static final byte[] getByteArrayFromUUID(UUID uuid) {
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long msb = uuid.getMostSignificantBits();
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long lsb = uuid.getLeastSignificantBits();
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byte[] uuidBytes = new byte[16];
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for (int i = 0; i < 8; ++i) {
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uuidBytes[i] = (byte)(msb >>> (8 * (7 - i)));
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uuidBytes[8 + i] = (byte)(lsb >>> (8 * (7 - i)));
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}
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return uuidBytes;
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}
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private static final native boolean isCryptoSchemeSupportedNative(byte[] uuid);
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/**
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* Instantiate a MediaCrypto object using opaque, crypto scheme specific
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* data.
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* @param uuid The UUID of the crypto scheme.
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* @param initData Opaque initialization data specific to the crypto scheme.
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*/
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public MediaCrypto(UUID uuid, byte[] initData) throws MediaCryptoException {
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native_setup(getByteArrayFromUUID(uuid), initData);
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}
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/**
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* Query if the crypto scheme requires the use of a secure decoder
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* to decode data of the given mime type.
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* @param mime The mime type of the media data
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*/
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public final native boolean requiresSecureDecoderComponent(String mime);
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@Override
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protected void finalize() {
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native_finalize();
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}
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public native final void release();
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private static native final void native_init();
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private native final void native_setup(byte[] uuid, byte[] initData)
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throws MediaCryptoException;
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private native final void native_finalize();
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static {
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System.loadLibrary("media_jni");
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native_init();
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}
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private long mNativeContext;
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}
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