media/jni/android_mtp_MtpServer.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2010 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_TAG "MtpServerJNI"
 #include "utils/Log.h"

 #include <stdio.h>
 #include <assert.h>
 #include <limits.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <utils/threads.h>

 #include "jni.h"
 #include "JNIHelp.h"
 #include "android_runtime/AndroidRuntime.h"
 #include "private/android_filesystem_config.h"

 #include "MtpServer.h"
 #include "MtpStorage.h"

 using namespace android;

 // MtpServer fields
 static jfieldID field_MtpServer_nativeContext;

 // MtpStorage fields
 static jfieldID field_MtpStorage_storageId;
 static jfieldID field_MtpStorage_path;
 static jfieldID field_MtpStorage_description;
 static jfieldID field_MtpStorage_reserveSpace;
 static jfieldID field_MtpStorage_removable;
 static jfieldID field_MtpStorage_maxFileSize;

 static Mutex sMutex;

 // ----------------------------------------------------------------------------

 // in android_mtp_MtpDatabase.cpp
 extern MtpDatabase* getMtpDatabase(JNIEnv *env, jobject database);

 static inline MtpServer* getMtpServer(JNIEnv *env, jobject thiz) {
     return (MtpServer*)env->GetLongField(thiz, field_MtpServer_nativeContext);
 }

 static void
 android_mtp_MtpServer_setup(JNIEnv *env, jobject thiz, jobject javaDatabase, jboolean usePtp)
 {
     int fd = open("/dev/mtp_usb", O_RDWR);
     if (fd >= 0) {
         MtpServer* server = new MtpServer(fd, getMtpDatabase(env, javaDatabase),
                 usePtp, AID_MEDIA_RW, 0664, 0775);
         env->SetLongField(thiz, field_MtpServer_nativeContext, (jlong)server);
     } else {
         ALOGE("could not open MTP driver, errno: %d", errno);
     }
 }

 static void
 android_mtp_MtpServer_run(JNIEnv *env, jobject thiz)
 {
     MtpServer* server = getMtpServer(env, thiz);
     if (server)
         server->run();
     else
         ALOGE("server is null in run");
 }

 static void
 android_mtp_MtpServer_cleanup(JNIEnv *env, jobject thiz)
 {
     Mutex::Autolock autoLock(sMutex);

     MtpServer* server = getMtpServer(env, thiz);
     if (server) {
         delete server;
         env->SetLongField(thiz, field_MtpServer_nativeContext, 0);
     } else {
         ALOGE("server is null in cleanup");
     }
 }

 static void
 android_mtp_MtpServer_send_object_added(JNIEnv *env, jobject thiz, jint handle)
 {
     Mutex::Autolock autoLock(sMutex);

     MtpServer* server = getMtpServer(env, thiz);
     if (server)
         server->sendObjectAdded(handle);
     else
         ALOGE("server is null in send_object_added");
 }

 static void
 android_mtp_MtpServer_send_object_removed(JNIEnv *env, jobject thiz, jint handle)
 {
     Mutex::Autolock autoLock(sMutex);

     MtpServer* server = getMtpServer(env, thiz);
     if (server)
         server->sendObjectRemoved(handle);
     else
         ALOGE("server is null in send_object_removed");
 }

 static void
 android_mtp_MtpServer_send_device_property_changed(JNIEnv *env, jobject thiz, jint property)
 {
     Mutex::Autolock autoLock(sMutex);

     MtpServer* server = getMtpServer(env, thiz);
     if (server)
         server->sendDevicePropertyChanged(property);
     else
         ALOGE("server is null in send_object_removed");
 }

 static void
 android_mtp_MtpServer_add_storage(JNIEnv *env, jobject thiz, jobject jstorage)
 {
     Mutex::Autolock autoLock(sMutex);

     MtpServer* server = getMtpServer(env, thiz);
     if (server) {
         jint storageID = env->GetIntField(jstorage, field_MtpStorage_storageId);
         jstring path = (jstring)env->GetObjectField(jstorage, field_MtpStorage_path);
         jstring description = (jstring)env->GetObjectField(jstorage, field_MtpStorage_description);
         jlong reserveSpace = env->GetLongField(jstorage, field_MtpStorage_reserveSpace);
         jboolean removable = env->GetBooleanField(jstorage, field_MtpStorage_removable);
         jlong maxFileSize = env->GetLongField(jstorage, field_MtpStorage_maxFileSize);

         const char *pathStr = env->GetStringUTFChars(path, NULL);
         if (pathStr != NULL) {
             const char *descriptionStr = env->GetStringUTFChars(description, NULL);
             if (descriptionStr != NULL) {
                 MtpStorage* storage = new MtpStorage(storageID, pathStr, descriptionStr,
                         reserveSpace, removable, maxFileSize);
                 server->addStorage(storage);
                 env->ReleaseStringUTFChars(path, pathStr);
                 env->ReleaseStringUTFChars(description, descriptionStr);
             } else {
                 env->ReleaseStringUTFChars(path, pathStr);
             }
         }
     } else {
         ALOGE("server is null in add_storage");
     }
 }

 static void
 android_mtp_MtpServer_remove_storage(JNIEnv *env, jobject thiz, jint storageId)
 {
     Mutex::Autolock autoLock(sMutex);

     MtpServer* server = getMtpServer(env, thiz);
     if (server) {
         MtpStorage* storage = server->getStorage(storageId);
         if (storage) {
             server->removeStorage(storage);
             delete storage;
         }
     } else
         ALOGE("server is null in remove_storage");
 }

 // ----------------------------------------------------------------------------

 static JNINativeMethod gMethods[] = {
     {"native_setup",                "(Landroid/mtp/MtpDatabase;Z)V",
                                             (void *)android_mtp_MtpServer_setup},
     {"native_run",                  "()V",  (void *)android_mtp_MtpServer_run},
     {"native_cleanup",              "()V",  (void *)android_mtp_MtpServer_cleanup},
     {"native_send_object_added",    "(I)V", (void *)android_mtp_MtpServer_send_object_added},
     {"native_send_object_removed",  "(I)V", (void *)android_mtp_MtpServer_send_object_removed},
     {"native_send_device_property_changed",  "(I)V",
                                     (void *)android_mtp_MtpServer_send_device_property_changed},
     {"native_add_storage",          "(Landroid/mtp/MtpStorage;)V",
                                             (void *)android_mtp_MtpServer_add_storage},
     {"native_remove_storage",       "(I)V", (void *)android_mtp_MtpServer_remove_storage},
 };

 static const char* const kClassPathName = "android/mtp/MtpServer";

 int register_android_mtp_MtpServer(JNIEnv *env)
 {
     jclass clazz;

     clazz = env->FindClass("android/mtp/MtpStorage");
     if (clazz == NULL) {
         ALOGE("Can't find android/mtp/MtpStorage");
         return -1;
     }
     field_MtpStorage_storageId = env->GetFieldID(clazz, "mStorageId", "I");
     if (field_MtpStorage_storageId == NULL) {
         ALOGE("Can't find MtpStorage.mStorageId");
         return -1;
     }
     field_MtpStorage_path = env->GetFieldID(clazz, "mPath", "Ljava/lang/String;");
     if (field_MtpStorage_path == NULL) {
         ALOGE("Can't find MtpStorage.mPath");
         return -1;
     }
     field_MtpStorage_description = env->GetFieldID(clazz, "mDescription", "Ljava/lang/String;");
     if (field_MtpStorage_description == NULL) {
         ALOGE("Can't find MtpStorage.mDescription");
         return -1;
     }
     field_MtpStorage_reserveSpace = env->GetFieldID(clazz, "mReserveSpace", "J");
     if (field_MtpStorage_reserveSpace == NULL) {
         ALOGE("Can't find MtpStorage.mReserveSpace");
         return -1;
     }
     field_MtpStorage_removable = env->GetFieldID(clazz, "mRemovable", "Z");
     if (field_MtpStorage_removable == NULL) {
         ALOGE("Can't find MtpStorage.mRemovable");
         return -1;
     }
     field_MtpStorage_maxFileSize = env->GetFieldID(clazz, "mMaxFileSize", "J");
     if (field_MtpStorage_maxFileSize == NULL) {
         ALOGE("Can't find MtpStorage.mMaxFileSize");
         return -1;
     }

     clazz = env->FindClass("android/mtp/MtpServer");
     if (clazz == NULL) {
         ALOGE("Can't find android/mtp/MtpServer");
         return -1;
     }
     field_MtpServer_nativeContext = env->GetFieldID(clazz, "mNativeContext", "J");
     if (field_MtpServer_nativeContext == NULL) {
         ALOGE("Can't find MtpServer.mNativeContext");
         return -1;
     }

     return AndroidRuntime::registerNativeMethods(env,
                 "android/mtp/MtpServer", gMethods, NELEM(gMethods));
 }
	/*
	* Copyright (C) 2010 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_TAG "MtpServerJNI"
	#include "utils/Log.h"

	#include <stdio.h>
	#include <assert.h>
	#include <limits.h>
	#include <unistd.h>
	#include <fcntl.h>
	#include <utils/threads.h>

	#include "jni.h"
	#include "JNIHelp.h"
	#include "android_runtime/AndroidRuntime.h"
	#include "private/android_filesystem_config.h"

	#include "MtpServer.h"
	#include "MtpStorage.h"

	using namespace android;

	// MtpServer fields
	static jfieldID field_MtpServer_nativeContext;

	// MtpStorage fields
	static jfieldID field_MtpStorage_storageId;
	static jfieldID field_MtpStorage_path;
	static jfieldID field_MtpStorage_description;
	static jfieldID field_MtpStorage_reserveSpace;
	static jfieldID field_MtpStorage_removable;
	static jfieldID field_MtpStorage_maxFileSize;

	static Mutex sMutex;

	// ----------------------------------------------------------------------------

	// in android_mtp_MtpDatabase.cpp
	extern MtpDatabase* getMtpDatabase(JNIEnv *env, jobject database);

	static inline MtpServer* getMtpServer(JNIEnv *env, jobject thiz) {
	return (MtpServer*)env->GetLongField(thiz, field_MtpServer_nativeContext);
	}

	static void
	android_mtp_MtpServer_setup(JNIEnv *env, jobject thiz, jobject javaDatabase, jboolean usePtp)
	{
	int fd = open("/dev/mtp_usb", O_RDWR);
	if (fd >= 0) {
	MtpServer* server = new MtpServer(fd, getMtpDatabase(env, javaDatabase),
	usePtp, AID_MEDIA_RW, 0664, 0775);
	env->SetLongField(thiz, field_MtpServer_nativeContext, (jlong)server);
	} else {
	ALOGE("could not open MTP driver, errno: %d", errno);
	}
	}

	static void
	android_mtp_MtpServer_run(JNIEnv *env, jobject thiz)
	{
	MtpServer* server = getMtpServer(env, thiz);
	if (server)
	server->run();
	else
	ALOGE("server is null in run");
	}

	static void
	android_mtp_MtpServer_cleanup(JNIEnv *env, jobject thiz)
	{
	Mutex::Autolock autoLock(sMutex);

	MtpServer* server = getMtpServer(env, thiz);
	if (server) {
	delete server;
	env->SetLongField(thiz, field_MtpServer_nativeContext, 0);
	} else {
	ALOGE("server is null in cleanup");
	}
	}

	static void
	android_mtp_MtpServer_send_object_added(JNIEnv *env, jobject thiz, jint handle)
	{
	Mutex::Autolock autoLock(sMutex);

	MtpServer* server = getMtpServer(env, thiz);
	if (server)
	server->sendObjectAdded(handle);
	else
	ALOGE("server is null in send_object_added");
	}

	static void
	android_mtp_MtpServer_send_object_removed(JNIEnv *env, jobject thiz, jint handle)
	{
	Mutex::Autolock autoLock(sMutex);

	MtpServer* server = getMtpServer(env, thiz);
	if (server)
	server->sendObjectRemoved(handle);
	else
	ALOGE("server is null in send_object_removed");
	}

	static void
	android_mtp_MtpServer_send_device_property_changed(JNIEnv *env, jobject thiz, jint property)
	{
	Mutex::Autolock autoLock(sMutex);

	MtpServer* server = getMtpServer(env, thiz);
	if (server)
	server->sendDevicePropertyChanged(property);
	else
	ALOGE("server is null in send_object_removed");
	}

	static void
	android_mtp_MtpServer_add_storage(JNIEnv *env, jobject thiz, jobject jstorage)
	{
	Mutex::Autolock autoLock(sMutex);

	MtpServer* server = getMtpServer(env, thiz);
	if (server) {
	jint storageID = env->GetIntField(jstorage, field_MtpStorage_storageId);
	jstring path = (jstring)env->GetObjectField(jstorage, field_MtpStorage_path);
	jstring description = (jstring)env->GetObjectField(jstorage, field_MtpStorage_description);
	jlong reserveSpace = env->GetLongField(jstorage, field_MtpStorage_reserveSpace);
	jboolean removable = env->GetBooleanField(jstorage, field_MtpStorage_removable);
	jlong maxFileSize = env->GetLongField(jstorage, field_MtpStorage_maxFileSize);

	const char *pathStr = env->GetStringUTFChars(path, NULL);
	if (pathStr != NULL) {
	const char *descriptionStr = env->GetStringUTFChars(description, NULL);
	if (descriptionStr != NULL) {
	MtpStorage* storage = new MtpStorage(storageID, pathStr, descriptionStr,
	reserveSpace, removable, maxFileSize);
	server->addStorage(storage);
	env->ReleaseStringUTFChars(path, pathStr);
	env->ReleaseStringUTFChars(description, descriptionStr);
	} else {
	env->ReleaseStringUTFChars(path, pathStr);
	}
	}
	} else {
	ALOGE("server is null in add_storage");
	}
	}

	static void
	android_mtp_MtpServer_remove_storage(JNIEnv *env, jobject thiz, jint storageId)
	{
	Mutex::Autolock autoLock(sMutex);

	MtpServer* server = getMtpServer(env, thiz);
	if (server) {
	MtpStorage* storage = server->getStorage(storageId);
	if (storage) {
	server->removeStorage(storage);
	delete storage;
	}
	} else
	ALOGE("server is null in remove_storage");
	}

	// ----------------------------------------------------------------------------

	static JNINativeMethod gMethods[] = {
	{"native_setup", "(Landroid/mtp/MtpDatabase;Z)V",
	(void *)android_mtp_MtpServer_setup},
	{"native_run", "()V", (void *)android_mtp_MtpServer_run},
	{"native_cleanup", "()V", (void *)android_mtp_MtpServer_cleanup},
	{"native_send_object_added", "(I)V", (void *)android_mtp_MtpServer_send_object_added},
	{"native_send_object_removed", "(I)V", (void *)android_mtp_MtpServer_send_object_removed},
	{"native_send_device_property_changed", "(I)V",
	(void *)android_mtp_MtpServer_send_device_property_changed},
	{"native_add_storage", "(Landroid/mtp/MtpStorage;)V",
	(void *)android_mtp_MtpServer_add_storage},
	{"native_remove_storage", "(I)V", (void *)android_mtp_MtpServer_remove_storage},
	};

	static const char* const kClassPathName = "android/mtp/MtpServer";

	int register_android_mtp_MtpServer(JNIEnv *env)
	{
	jclass clazz;

	clazz = env->FindClass("android/mtp/MtpStorage");
	if (clazz == NULL) {
	ALOGE("Can't find android/mtp/MtpStorage");
	return -1;
	}
	field_MtpStorage_storageId = env->GetFieldID(clazz, "mStorageId", "I");
	if (field_MtpStorage_storageId == NULL) {
	ALOGE("Can't find MtpStorage.mStorageId");
	return -1;
	}
	field_MtpStorage_path = env->GetFieldID(clazz, "mPath", "Ljava/lang/String;");
	if (field_MtpStorage_path == NULL) {
	ALOGE("Can't find MtpStorage.mPath");
	return -1;
	}
	field_MtpStorage_description = env->GetFieldID(clazz, "mDescription", "Ljava/lang/String;");
	if (field_MtpStorage_description == NULL) {
	ALOGE("Can't find MtpStorage.mDescription");
	return -1;
	}
	field_MtpStorage_reserveSpace = env->GetFieldID(clazz, "mReserveSpace", "J");
	if (field_MtpStorage_reserveSpace == NULL) {
	ALOGE("Can't find MtpStorage.mReserveSpace");
	return -1;
	}
	field_MtpStorage_removable = env->GetFieldID(clazz, "mRemovable", "Z");
	if (field_MtpStorage_removable == NULL) {
	ALOGE("Can't find MtpStorage.mRemovable");
	return -1;
	}
	field_MtpStorage_maxFileSize = env->GetFieldID(clazz, "mMaxFileSize", "J");
	if (field_MtpStorage_maxFileSize == NULL) {
	ALOGE("Can't find MtpStorage.mMaxFileSize");
	return -1;
	}

	clazz = env->FindClass("android/mtp/MtpServer");
	if (clazz == NULL) {
	ALOGE("Can't find android/mtp/MtpServer");
	return -1;
	}
	field_MtpServer_nativeContext = env->GetFieldID(clazz, "mNativeContext", "J");
	if (field_MtpServer_nativeContext == NULL) {
	ALOGE("Can't find MtpServer.mNativeContext");
	return -1;
	}

	return AndroidRuntime::registerNativeMethods(env,
	"android/mtp/MtpServer", gMethods, NELEM(gMethods));
	}