Implementing MediaDrm APIs

Change-Id: I9ff8eeb7d0c383b5c0c68cd54eb54ce7d2d22fe6

7 files changed, 619 insertions, 0 deletions

diff --git a/media/libmediaplayerservice/Android.mk b/media/libmediaplayerservice/Android.mk
index 48f48e4..2a6f3c7 100644
--- a/media/libmediaplayerservice/Android.mk
+++ b/media/libmediaplayerservice/Android.mk
@@ -9,6 +9,7 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES:=               \
     ActivityManager.cpp         \
     Crypto.cpp                  \
+    Drm.cpp                     \
     HDCP.cpp                    \
     MediaPlayerFactory.cpp      \
     MediaPlayerService.cpp      \
@@ -17,6 +18,7 @@ LOCAL_SRC_FILES:=               \
     MidiFile.cpp                \
     MidiMetadataRetriever.cpp   \
     RemoteDisplay.cpp           \
+    SharedLibrary.cpp           \
     StagefrightPlayer.cpp       \
     StagefrightRecorder.cpp     \
     TestPlayerStub.cpp          \
diff --git a/media/libmediaplayerservice/Drm.cpp b/media/libmediaplayerservice/Drm.cpp
new file mode 100644
index 0000000..6ac7530
--- /dev/null
+++ b/media/libmediaplayerservice/Drm.cpp
@@ -0,0 +1,423 @@
+/*
+ * Copyright (C) 2013 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 "Drm"
+#include <utils/Log.h>
+
+#include <dirent.h>
+#include <dlfcn.h>
+
+#include "Drm.h"
+
+#include <media/drm/DrmAPI.h>
+#include <media/stagefright/foundation/ADebug.h>
+#include <media/stagefright/foundation/AString.h>
+#include <media/stagefright/foundation/hexdump.h>
+#include <media/stagefright/MediaErrors.h>
+
+namespace android {
+
+KeyedVector<Vector<uint8_t>, String8> Drm::mUUIDToLibraryPathMap;
+KeyedVector<String8, wp<SharedLibrary> > Drm::mLibraryPathToOpenLibraryMap;
+Mutex Drm::mMapLock;
+
+static bool operator<(const Vector<uint8_t> &lhs, const Vector<uint8_t> &rhs) {
+    if (lhs.size() < rhs.size()) {
+        return true;
+    } else if (lhs.size() > rhs.size()) {
+        return false;
+    }
+
+    return memcmp((void *)lhs.array(), (void *)rhs.array(), rhs.size()) < 0;
+}
+
+Drm::Drm()
+    : mInitCheck(NO_INIT),
+      mFactory(NULL),
+      mPlugin(NULL) {
+}
+
+Drm::~Drm() {
+    delete mPlugin;
+    mPlugin = NULL;
+    closeFactory();
+}
+
+void Drm::closeFactory() {
+    delete mFactory;
+    mFactory = NULL;
+    mLibrary.clear();
+}
+
+status_t Drm::initCheck() const {
+    return mInitCheck;
+}
+
+
+/*
+ * Search the plugins directory for a plugin that supports the scheme
+ * specified by uuid
+ *
+ * If found:
+ *    mLibrary holds a strong pointer to the dlopen'd library
+ *    mFactory is set to the library's factory method
+ *    mInitCheck is set to OK
+ *
+ * If not found:
+ *    mLibrary is cleared and mFactory are set to NULL
+ *    mInitCheck is set to an error (!OK)
+ */
+void Drm::findFactoryForScheme(const uint8_t uuid[16]) {
+
+    closeFactory();
+
+    // lock static maps
+    Mutex::Autolock autoLock(mMapLock);
+
+    // first check cache
+    Vector<uint8_t> uuidVector;
+    uuidVector.appendArray(uuid, sizeof(uuid));
+    ssize_t index = mUUIDToLibraryPathMap.indexOfKey(uuidVector);
+    if (index >= 0) {
+        if (loadLibraryForScheme(mUUIDToLibraryPathMap[index], uuid)) {
+            mInitCheck = OK;
+            return;
+        } else {
+            ALOGE("Failed to load from cached library path!");
+            mInitCheck = ERROR_UNSUPPORTED;
+            return;
+        }
+    }
+
+    // no luck, have to search
+    String8 dirPath("/vendor/lib/mediadrm");
+    DIR* pDir = opendir(dirPath.string());
+
+    if (pDir == NULL) {
+        mInitCheck = ERROR_UNSUPPORTED;
+        ALOGE("Failed to open plugin directory %s", dirPath.string());
+        return;
+    }
+
+
+    struct dirent* pEntry;
+    while ((pEntry = readdir(pDir))) {
+
+        String8 pluginPath = dirPath + "/" + pEntry->d_name;
+
+        if (pluginPath.getPathExtension() == ".so") {
+
+            if (loadLibraryForScheme(pluginPath, uuid)) {
+                mUUIDToLibraryPathMap.add(uuidVector, pluginPath);
+                mInitCheck = OK;
+                closedir(pDir);
+                return;
+            }
+        }
+    }
+
+    closedir(pDir);
+
+    ALOGE("Failed to find drm plugin");
+    mInitCheck = ERROR_UNSUPPORTED;
+}
+
+bool Drm::loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]) {
+
+    // get strong pointer to open shared library
+    ssize_t index = mLibraryPathToOpenLibraryMap.indexOfKey(path);
+    if (index >= 0) {
+        mLibrary = mLibraryPathToOpenLibraryMap[index].promote();
+    } else {
+        index = mLibraryPathToOpenLibraryMap.add(path, NULL);
+    }
+
+    if (!mLibrary.get()) {
+        mLibrary = new SharedLibrary(path);
+        if (!*mLibrary) {
+            return false;
+        }
+
+        mLibraryPathToOpenLibraryMap.replaceValueAt(index, mLibrary);
+    }
+
+    typedef DrmFactory *(*CreateDrmFactoryFunc)();
+
+    CreateDrmFactoryFunc createDrmFactory =
+        (CreateDrmFactoryFunc)mLibrary->lookup("createDrmFactory");
+
+    if (createDrmFactory == NULL ||
+        (mFactory = createDrmFactory()) == NULL ||
+        !mFactory->isCryptoSchemeSupported(uuid)) {
+        closeFactory();
+        return false;
+    }
+    return true;
+}
+
+bool Drm::isCryptoSchemeSupported(const uint8_t uuid[16]) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mFactory && mFactory->isCryptoSchemeSupported(uuid)) {
+        return true;
+    }
+
+    findFactoryForScheme(uuid);
+    return (mInitCheck == OK);
+}
+
+status_t Drm::createPlugin(const uint8_t uuid[16]) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mPlugin != NULL) {
+        return -EINVAL;
+    }
+
+    if (!mFactory || !mFactory->isCryptoSchemeSupported(uuid)) {
+        findFactoryForScheme(uuid);
+    }
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    return mFactory->createDrmPlugin(uuid, &mPlugin);
+}
+
+status_t Drm::destroyPlugin() {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    delete mPlugin;
+    mPlugin = NULL;
+
+    return OK;
+}
+
+status_t Drm::openSession(Vector<uint8_t> &sessionId) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->openSession(sessionId);
+}
+
+status_t Drm::closeSession(Vector<uint8_t> const &sessionId) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->closeSession(sessionId);
+}
+
+status_t Drm::getLicenseRequest(Vector<uint8_t> const &sessionId,
+                                Vector<uint8_t> const &initData,
+                                String8 const &mimeType, DrmPlugin::LicenseType licenseType,
+                                KeyedVector<String8, String8> const &optionalParameters,
+                                Vector<uint8_t> &request, String8 &defaultUrl) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getLicenseRequest(sessionId, initData, mimeType, licenseType,
+                                      optionalParameters, request, defaultUrl);
+}
+
+status_t Drm::provideLicenseResponse(Vector<uint8_t> const &sessionId,
+                                     Vector<uint8_t> const &response) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->provideLicenseResponse(sessionId, response);
+}
+
+status_t Drm::removeLicense(Vector<uint8_t> const &sessionId) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->removeLicense(sessionId);
+}
+
+status_t Drm::queryLicenseStatus(Vector<uint8_t> const &sessionId,
+                                 KeyedVector<String8, String8> &infoMap) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->queryLicenseStatus(sessionId, infoMap);
+}
+
+status_t Drm::getProvisionRequest(Vector<uint8_t> &request, String8 &defaultUrl) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getProvisionRequest(request, defaultUrl);
+}
+
+status_t Drm::provideProvisionResponse(Vector<uint8_t> const &response) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->provideProvisionResponse(response);
+}
+
+
+status_t Drm::getSecureStops(List<Vector<uint8_t> > &secureStops) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getSecureStops(secureStops);
+}
+
+status_t Drm::releaseSecureStops(Vector<uint8_t> const &ssRelease) {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->releaseSecureStops(ssRelease);
+}
+
+status_t Drm::getPropertyString(String8 const &name, String8 &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getPropertyString(name, value);
+}
+
+status_t Drm::getPropertyByteArray(String8 const &name, Vector<uint8_t> &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->getPropertyByteArray(name, value);
+}
+
+status_t Drm::setPropertyString(String8 const &name, String8 const &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->setPropertyString(name, value);
+}
+
+status_t Drm::setPropertyByteArray(String8 const &name,
+                                   Vector<uint8_t> const &value ) const {
+    Mutex::Autolock autoLock(mLock);
+
+    if (mInitCheck != OK) {
+        return mInitCheck;
+    }
+
+    if (mPlugin == NULL) {
+        return -EINVAL;
+    }
+
+    return mPlugin->setPropertyByteArray(name, value);
+}
+
+}  // namespace android
diff --git a/media/libmediaplayerservice/Drm.h b/media/libmediaplayerservice/Drm.h
new file mode 100644
index 0000000..1b10958
--- /dev/null
+++ b/media/libmediaplayerservice/Drm.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2013 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 DRM_H_
+
+#define DRM_H_
+
+#include "SharedLibrary.h"
+
+#include <media/IDrm.h>
+#include <utils/threads.h>
+
+namespace android {
+
+struct DrmFactory;
+struct DrmPlugin;
+
+struct Drm : public BnDrm {
+    Drm();
+    virtual ~Drm();
+
+    virtual status_t initCheck() const;
+
+    virtual bool isCryptoSchemeSupported(const uint8_t uuid[16]);
+
+    virtual status_t createPlugin(const uint8_t uuid[16]);
+
+    virtual status_t destroyPlugin();
+
+    virtual status_t openSession(Vector<uint8_t> &sessionId);
+
+    virtual status_t closeSession(Vector<uint8_t> const &sessionId);
+
+    virtual status_t
+        getLicenseRequest(Vector<uint8_t> const &sessionId,
+                          Vector<uint8_t> const &initData,
+                          String8 const &mimeType, DrmPlugin::LicenseType licenseType,
+                          KeyedVector<String8, String8> const &optionalParameters,
+                          Vector<uint8_t> &request, String8 &defaultUrl);
+
+    virtual status_t provideLicenseResponse(Vector<uint8_t> const &sessionId,
+                                            Vector<uint8_t> const &response);
+
+    virtual status_t removeLicense(Vector<uint8_t> const &sessionId);
+
+    virtual status_t queryLicenseStatus(Vector<uint8_t> const &sessionId,
+                                        KeyedVector<String8, String8> &infoMap) const;
+
+    virtual status_t getProvisionRequest(Vector<uint8_t> &request,
+                                         String8 &defaulUrl);
+
+    virtual status_t provideProvisionResponse(Vector<uint8_t> const &response);
+
+    virtual status_t getSecureStops(List<Vector<uint8_t> > &secureStops);
+
+    virtual status_t releaseSecureStops(Vector<uint8_t> const &ssRelease);
+
+    virtual status_t getPropertyString(String8 const &name, String8 &value ) const;
+    virtual status_t getPropertyByteArray(String8 const &name,
+                                          Vector<uint8_t> &value ) const;
+    virtual status_t setPropertyString(String8 const &name, String8 const &value ) const;
+    virtual status_t setPropertyByteArray(String8 const &name,
+                                          Vector<uint8_t> const &value ) const;
+
+private:
+    mutable Mutex mLock;
+
+    status_t mInitCheck;
+    sp<SharedLibrary> mLibrary;
+    DrmFactory *mFactory;
+    DrmPlugin *mPlugin;
+
+    static KeyedVector<Vector<uint8_t>, String8> mUUIDToLibraryPathMap;
+    static KeyedVector<String8, wp<SharedLibrary> > mLibraryPathToOpenLibraryMap;
+    static Mutex mMapLock;
+
+    void findFactoryForScheme(const uint8_t uuid[16]);
+    bool loadLibraryForScheme(const String8 &path, const uint8_t uuid[16]);
+    void closeFactory();
+
+
+    DISALLOW_EVIL_CONSTRUCTORS(Drm);
+};
+
+}  // namespace android
+
+#endif  // CRYPTO_H_
diff --git a/media/libmediaplayerservice/MediaPlayerService.cpp b/media/libmediaplayerservice/MediaPlayerService.cpp
index 16f1317..ec6ace1 100644
--- a/media/libmediaplayerservice/MediaPlayerService.cpp
+++ b/media/libmediaplayerservice/MediaPlayerService.cpp
@@ -72,6 +72,7 @@
 #include <OMX.h>
 
 #include "Crypto.h"
+#include "Drm.h"
 #include "HDCP.h"
 #include "RemoteDisplay.h"
 
@@ -285,6 +286,10 @@ sp<ICrypto> MediaPlayerService::makeCrypto() {
     return new Crypto;
 }
 
+sp<IDrm> MediaPlayerService::makeDrm() {
+    return new Drm;
+}
+
 sp<IHDCP> MediaPlayerService::makeHDCP(bool createEncryptionModule) {
     return new HDCP(createEncryptionModule);
 }
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index 2d2a09d..82dc29b 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -249,6 +249,7 @@ public:
     virtual sp<IMemory>         decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat);
     virtual sp<IOMX>            getOMX();
     virtual sp<ICrypto>         makeCrypto();
+    virtual sp<IDrm>            makeDrm();
     virtual sp<IHDCP>           makeHDCP(bool createEncryptionModule);
 
     virtual sp<IRemoteDisplay> listenForRemoteDisplay(const sp<IRemoteDisplayClient>& client,
diff --git a/media/libmediaplayerservice/SharedLibrary.cpp b/media/libmediaplayerservice/SharedLibrary.cpp
new file mode 100644
index 0000000..178e15d
--- /dev/null
+++ b/media/libmediaplayerservice/SharedLibrary.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2013 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 "Drm"
+#include <utils/Log.h>
+#include <media/stagefright/foundation/ADebug.h>
+
+#include <dlfcn.h>
+
+#include "SharedLibrary.h"
+
+namespace android {
+
+    SharedLibrary::SharedLibrary(const String8 &path) {
+        mLibHandle = dlopen(path.string(), RTLD_NOW);
+    }
+
+    SharedLibrary::~SharedLibrary() {
+        if (mLibHandle != NULL) {
+            dlclose(mLibHandle);
+            mLibHandle = NULL;
+        }
+    }
+
+    bool SharedLibrary::operator!() const {
+        return mLibHandle == NULL;
+    }
+
+    void *SharedLibrary::lookup(const char *symbol) const {
+        if (!mLibHandle) {
+            return NULL;
+        }
+        return dlsym(mLibHandle, symbol);
+    }
+};
diff --git a/media/libmediaplayerservice/SharedLibrary.h b/media/libmediaplayerservice/SharedLibrary.h
new file mode 100644
index 0000000..5353642
--- /dev/null
+++ b/media/libmediaplayerservice/SharedLibrary.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2013 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 SHARED_LIBRARY_H_
+#define SHARED_LIBRARY_H_
+
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+#include <media/stagefright/foundation/ABase.h>
+
+namespace android {
+    class SharedLibrary : public RefBase {
+    public:
+        SharedLibrary(const String8 &path);
+        ~SharedLibrary();
+
+        bool operator!() const;
+        void *lookup(const char *symbol) const;
+
+    private:
+        void *mLibHandle;
+        DISALLOW_EVIL_CONSTRUCTORS(SharedLibrary);
+    };
+};
+
+#endif // SHARED_LIBRARY_H_