Home | History | Annotate | Download | only in media 
      1 /*
      2  * Copyright (C) 2012 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 <binder/IInterface.h>
     18 #include <cutils/native_handle.h>
     19 #include <media/hardware/CryptoAPI.h>
     20 #include <media/stagefright/foundation/ABase.h>
     21 
     22 #ifndef ANDROID_ICRYPTO_H_
     23 
     24 #define ANDROID_ICRYPTO_H_
     25 
     26 namespace android {
     27 
     28 struct AString;
     29 class IMemory;
     30 class IMemoryHeap;
     31 
     32 struct ICrypto : public IInterface {
     33     DECLARE_META_INTERFACE(Crypto);
     34 
     35     virtual status_t initCheck() const = 0;
     36 
     37     virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]) = 0;
     38 
     39     virtual status_t createPlugin(
     40             const uint8_t uuid[16], const void *data, size_t size) = 0;
     41 
     42     virtual status_t destroyPlugin() = 0;
     43 
     44     virtual bool requiresSecureDecoderComponent(
     45             const char *mime) const = 0;
     46 
     47     virtual void notifyResolution(uint32_t width, uint32_t height) = 0;
     48 
     49     virtual status_t setMediaDrmSession(const Vector<uint8_t> &sessionId) = 0;
     50 
     51     struct SourceBuffer {
     52         sp<IMemory> mSharedMemory;
     53         int32_t mHeapSeqNum;
     54     };
     55 
     56     enum DestinationType {
     57         kDestinationTypeSharedMemory, // non-secure
     58         kDestinationTypeNativeHandle  // secure
     59     };
     60 
     61     struct DestinationBuffer {
     62         DestinationType mType;
     63         native_handle_t *mHandle;
     64         sp<IMemory> mSharedMemory;
     65     };
     66 
     67     virtual ssize_t decrypt(const uint8_t key[16], const uint8_t iv[16],
     68             CryptoPlugin::Mode mode, const CryptoPlugin::Pattern &pattern,
     69             const SourceBuffer &source, size_t offset,
     70             const CryptoPlugin::SubSample *subSamples, size_t numSubSamples,
     71             const DestinationBuffer &destination, AString *errorDetailMsg) = 0;
     72 
     73     /**
     74      * Declare the heap that the shared memory source buffers passed
     75      * to decrypt will be allocated from. Returns a sequence number
     76      * that subsequent decrypt calls can use to refer to the heap,
     77      * with -1 indicating failure.
     78      */
     79     virtual int32_t setHeap(const sp<IMemoryHeap>& heap) = 0;
     80     virtual void unsetHeap(int32_t seqNum) = 0;
     81 
     82 private:
     83     DISALLOW_EVIL_CONSTRUCTORS(ICrypto);
     84 };
     85 
     86 struct BnCrypto : public BnInterface<ICrypto> {
     87     virtual status_t onTransact(
     88             uint32_t code, const Parcel &data, Parcel *reply,
     89             uint32_t flags = 0);
     90 private:
     91     void readVector(const Parcel &data, Vector<uint8_t> &vector) const;
     92     void writeVector(Parcel *reply, Vector<uint8_t> const &vector) const;
     93 };
     94 
     95 }  // namespace android
     96 
     97 #endif // ANDROID_ICRYPTO_H_
     98