Preliminary support for HDCP as a binder service for wifi display support.

Change-Id: Ie0de1c086c629a668d1c7863992eef56fb94157c

5 files changed, 434 insertions, 0 deletions

diff --git a/include/media/IHDCP.h b/include/media/IHDCP.h
new file mode 100644
index 0000000..a0613c7
--- /dev/null
+++ b/include/media/IHDCP.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+#include <binder/IInterface.h>
+#include <media/hardware/HDCPAPI.h>
+#include <media/stagefright/foundation/ABase.h>
+
+namespace android {
+
+struct IHDCPObserver : public IInterface {
+    DECLARE_META_INTERFACE(HDCPObserver);
+
+    virtual void notify(
+            int msg, int ext1, int ext2, const Parcel *obj) = 0;
+
+private:
+    DISALLOW_EVIL_CONSTRUCTORS(IHDCPObserver);
+};
+
+struct IHDCP : public IInterface {
+    DECLARE_META_INTERFACE(HDCP);
+
+    // Called to specify the observer that receives asynchronous notifications
+    // from the HDCP implementation to signal completion/failure of asynchronous
+    // operations (such as initialization) or out of band events.
+    virtual status_t setObserver(const sp<IHDCPObserver> &observer) = 0;
+
+    // Request to setup an HDCP session with the specified host listening
+    // on the specified port.
+    virtual status_t initAsync(const char *host, unsigned port) = 0;
+
+    // Request to shutdown the active HDCP session.
+    virtual status_t shutdownAsync() = 0;
+
+    // Encrypt a data according to the HDCP spec. The data is to be
+    // encrypted in-place, only size bytes of data should be read/write,
+    // even if the size is not a multiple of 128 bit (16 bytes).
+    // This operation is to be synchronous, i.e. this call does not return
+    // until outData contains size bytes of encrypted data.
+    // streamCTR will be assigned by the caller (to 0 for the first PES stream,
+    // 1 for the second and so on)
+    // inputCTR will be maintained by the callee for each PES stream.
+    virtual status_t encrypt(
+            const void *inData, size_t size, uint32_t streamCTR,
+            uint64_t *outInputCTR, void *outData) = 0;
+
+private:
+    DISALLOW_EVIL_CONSTRUCTORS(IHDCP);
+};
+
+struct BnHDCPObserver : public BnInterface<IHDCPObserver> {
+    virtual status_t onTransact(
+            uint32_t code, const Parcel &data, Parcel *reply,
+            uint32_t flags = 0);
+};
+
+struct BnHDCP : public BnInterface<IHDCP> {
+    virtual status_t onTransact(
+            uint32_t code, const Parcel &data, Parcel *reply,
+            uint32_t flags = 0);
+};
+
+}  // namespace android
+
+
diff --git a/media/libmedia/Android.mk b/media/libmedia/Android.mk
index c8e1dc7..bcce063 100644
--- a/media/libmedia/Android.mk
+++ b/media/libmedia/Android.mk
@@ -18,6 +18,7 @@ LOCAL_SRC_FILES:= \
     IAudioTrack.cpp \
     IAudioRecord.cpp \
     ICrypto.cpp \
+    IHDCP.cpp \
     AudioRecord.cpp \
     AudioSystem.cpp \
     mediaplayer.cpp \
diff --git a/media/libmedia/IHDCP.cpp b/media/libmedia/IHDCP.cpp
new file mode 100644
index 0000000..493f5a4
--- /dev/null
+++ b/media/libmedia/IHDCP.cpp
@@ -0,0 +1,206 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "IHDCP"
+#include <utils/Log.h>
+
+#include <binder/Parcel.h>
+#include <media/IHDCP.h>
+#include <media/stagefright/MediaErrors.h>
+#include <media/stagefright/foundation/ADebug.h>
+
+namespace android {
+
+enum {
+    OBSERVER_NOTIFY = IBinder::FIRST_CALL_TRANSACTION,
+    HDCP_SET_OBSERVER,
+    HDCP_INIT_ASYNC,
+    HDCP_SHUTDOWN_ASYNC,
+    HDCP_ENCRYPT,
+};
+
+struct BpHDCPObserver : public BpInterface<IHDCPObserver> {
+    BpHDCPObserver(const sp<IBinder> &impl)
+        : BpInterface<IHDCPObserver>(impl) {
+    }
+
+    virtual void notify(
+            int msg, int ext1, int ext2, const Parcel *obj) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IHDCPObserver::getInterfaceDescriptor());
+        data.writeInt32(msg);
+        data.writeInt32(ext1);
+        data.writeInt32(ext2);
+        if (obj && obj->dataSize() > 0) {
+            data.appendFrom(const_cast<Parcel *>(obj), 0, obj->dataSize());
+        }
+        remote()->transact(OBSERVER_NOTIFY, data, &reply, IBinder::FLAG_ONEWAY);
+    }
+};
+
+IMPLEMENT_META_INTERFACE(HDCPObserver, "android.hardware.IHDCPObserver");
+
+struct BpHDCP : public BpInterface<IHDCP> {
+    BpHDCP(const sp<IBinder> &impl)
+        : BpInterface<IHDCP>(impl) {
+    }
+
+    virtual status_t setObserver(const sp<IHDCPObserver> &observer) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IHDCP::getInterfaceDescriptor());
+        data.writeStrongBinder(observer->asBinder());
+        remote()->transact(HDCP_SET_OBSERVER, data, &reply);
+        return reply.readInt32();
+    }
+
+    virtual status_t initAsync(const char *host, unsigned port) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IHDCP::getInterfaceDescriptor());
+        data.writeCString(host);
+        data.writeInt32(port);
+        remote()->transact(HDCP_INIT_ASYNC, data, &reply);
+        return reply.readInt32();
+    }
+
+    virtual status_t shutdownAsync() {
+        Parcel data, reply;
+        data.writeInterfaceToken(IHDCP::getInterfaceDescriptor());
+        remote()->transact(HDCP_SHUTDOWN_ASYNC, data, &reply);
+        return reply.readInt32();
+    }
+
+    virtual status_t encrypt(
+            const void *inData, size_t size, uint32_t streamCTR,
+            uint64_t *outInputCTR, void *outData) {
+        Parcel data, reply;
+        data.writeInterfaceToken(IHDCP::getInterfaceDescriptor());
+        data.writeInt32(size);
+        data.write(inData, size);
+        data.writeInt32(streamCTR);
+        remote()->transact(HDCP_ENCRYPT, data, &reply);
+
+        status_t err = reply.readInt32();
+
+        if (err != OK) {
+            *outInputCTR = 0;
+
+            return err;
+        }
+
+        *outInputCTR = reply.readInt64();
+        reply.read(outData, size);
+
+        return err;
+    }
+};
+
+IMPLEMENT_META_INTERFACE(HDCP, "android.hardware.IHDCP");
+
+status_t BnHDCPObserver::onTransact(
+        uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags) {
+    switch (code) {
+        case OBSERVER_NOTIFY:
+        {
+            CHECK_INTERFACE(IHDCPObserver, data, reply);
+
+            int msg = data.readInt32();
+            int ext1 = data.readInt32();
+            int ext2 = data.readInt32();
+
+            Parcel obj;
+            if (data.dataAvail() > 0) {
+                obj.appendFrom(
+                        const_cast<Parcel *>(&data),
+                        data.dataPosition(),
+                        data.dataAvail());
+            }
+
+            notify(msg, ext1, ext2, &obj);
+
+            return OK;
+        }
+
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+status_t BnHDCP::onTransact(
+        uint32_t code, const Parcel &data, Parcel *reply, uint32_t flags) {
+    switch (code) {
+        case HDCP_SET_OBSERVER:
+        {
+            CHECK_INTERFACE(IHDCP, data, reply);
+
+            sp<IHDCPObserver> observer =
+                interface_cast<IHDCPObserver>(data.readStrongBinder());
+
+            reply->writeInt32(setObserver(observer));
+            return OK;
+        }
+
+        case HDCP_INIT_ASYNC:
+        {
+            CHECK_INTERFACE(IHDCP, data, reply);
+
+            const char *host = data.readCString();
+            unsigned port = data.readInt32();
+
+            reply->writeInt32(initAsync(host, port));
+            return OK;
+        }
+
+        case HDCP_SHUTDOWN_ASYNC:
+        {
+            CHECK_INTERFACE(IHDCP, data, reply);
+
+            reply->writeInt32(shutdownAsync());
+            return OK;
+        }
+
+        case HDCP_ENCRYPT:
+        {
+            size_t size = data.readInt32();
+
+            void *inData = malloc(2 * size);
+            void *outData = (uint8_t *)inData + size;
+
+            data.read(inData, size);
+
+            uint32_t streamCTR = data.readInt32();
+            uint64_t inputCTR;
+            status_t err = encrypt(inData, size, streamCTR, &inputCTR, outData);
+
+            reply->writeInt32(err);
+
+            if (err == OK) {
+                reply->writeInt64(inputCTR);
+                reply->write(outData, size);
+            }
+
+            free(inData);
+            inData = outData = NULL;
+
+            return OK;
+        }
+
+        default:
+            return BBinder::onTransact(code, data, reply, flags);
+    }
+}
+
+}  // namespace android
diff --git a/media/libmediaplayerservice/HDCP.cpp b/media/libmediaplayerservice/HDCP.cpp
new file mode 100644
index 0000000..6f8a465
--- /dev/null
+++ b/media/libmediaplayerservice/HDCP.cpp
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2012 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "HDCP"
+#include <utils/Log.h>
+
+#include "HDCP.h"
+
+#include <media/stagefright/foundation/ADebug.h>
+
+#include <dlfcn.h>
+
+namespace android {
+
+HDCP::HDCP()
+    : mLibHandle(NULL),
+      mHDCPModule(NULL) {
+    mLibHandle = dlopen("libstagefright_hdcp.so", RTLD_NOW);
+
+    if (mLibHandle == NULL) {
+        ALOGE("Unable to locate libstagefright_hdcp.so");
+        return;
+    }
+
+    typedef HDCPModule *(*CreateHDCPModuleFunc)();
+    CreateHDCPModuleFunc createHDCPModule =
+        (CreateHDCPModuleFunc)dlsym(mLibHandle, "createHDCPModule");
+
+    if (createHDCPModule == NULL) {
+        ALOGE("Unable to find symbol 'createHDCPModule'.");
+    } else if ((mHDCPModule = createHDCPModule()) == NULL) {
+        ALOGE("createHDCPModule failed.");
+    }
+}
+
+HDCP::~HDCP() {
+    if (mHDCPModule != NULL) {
+        delete mHDCPModule;
+        mHDCPModule = NULL;
+    }
+
+    if (mLibHandle != NULL) {
+        dlclose(mLibHandle);
+        mLibHandle = NULL;
+    }
+}
+
+status_t HDCP::setObserver(const sp<IHDCPObserver> &observer) {
+    if (mHDCPModule == NULL) {
+        return NO_INIT;
+    }
+
+    mObserver = observer;
+
+    return OK;
+}
+
+status_t HDCP::initAsync(const char *host, unsigned port) {
+    if (mHDCPModule == NULL) {
+        return NO_INIT;
+    }
+
+    return mHDCPModule->initAsync(host, port);
+}
+
+status_t HDCP::shutdownAsync() {
+    if (mHDCPModule == NULL) {
+        return NO_INIT;
+    }
+
+    return mHDCPModule->shutdownAsync();
+}
+
+status_t HDCP::encrypt(
+        const void *inData, size_t size, uint32_t streamCTR,
+        uint64_t *outInputCTR, void *outData) {
+    if (mHDCPModule == NULL) {
+        *outInputCTR = 0;
+
+        return NO_INIT;
+    }
+
+    return mHDCPModule->encrypt(inData, size, streamCTR, outInputCTR, outData);
+}
+
+}  // namespace android
+
diff --git a/media/libmediaplayerservice/HDCP.h b/media/libmediaplayerservice/HDCP.h
new file mode 100644
index 0000000..2e27689
--- /dev/null
+++ b/media/libmediaplayerservice/HDCP.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2012 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 HDCP_H_
+
+#define HDCP_H_
+
+#include <media/IHDCP.h>
+
+namespace android {
+
+struct HDCP : public BnHDCP {
+    HDCP();
+    virtual ~HDCP();
+
+    virtual status_t setObserver(const sp<IHDCPObserver> &observer);
+    virtual status_t initAsync(const char *host, unsigned port);
+    virtual status_t shutdownAsync();
+
+    virtual status_t encrypt(
+            const void *inData, size_t size, uint32_t streamCTR,
+            uint64_t *outInputCTR, void *outData);
+
+private:
+    void *mLibHandle;
+    HDCPModule *mHDCPModule;
+    sp<IHDCPObserver> mObserver;
+
+    DISALLOW_EVIL_CONSTRUCTORS(HDCP);
+};
+
+}  // namespace android
+
+#endif  // HDCP_H_
+