Merge "Add getObjectSizeLong hidden API to MtpDevice class." into nyc-dev (135c9eec) · Commits · e / os / android_frameworks_base

media/java/android/mtp/MtpDevice.java

+13 −0

Original line number	Diff line number	Diff line
		@@ -355,6 +355,18 @@ public final class MtpDevice {
		}
		}

		/**
		* Returns object size in 64-bit integer.
		*
		* The object size stored in MtpObjectInfo is unsigned 32-bit integer.
		* The methods reads 64-bit object size from the object property so that it can fetch 4GB+
		* object size correctly.
		* @hide
		*/
		public long getObjectSizeLong(int handle, int format) throws IOException {
		return native_get_object_size_long(handle, format);
		}

		// used by the JNI code
		private long mNativeContext;

		@@ -381,4 +393,5 @@ public final class MtpDevice {
		private native int native_submit_event_request();
		private native MtpEvent native_reap_event_request(int handle);
		private native void native_discard_event_request(int handle);
		private native long native_get_object_size_long(int handle, int format) throws IOException;
		}

media/jni/android_mtp_MtpDevice.cpp

+37 −0

Original line number	Diff line number	Diff line
		@@ -42,6 +42,7 @@
		#include "MtpDeviceInfo.h"
		#include "MtpStorageInfo.h"
		#include "MtpObjectInfo.h"
		#include "MtpProperty.h"

		using namespace android;

		@@ -700,6 +701,40 @@ static void android_mtp_MtpDevice_discard_event_request(JNIEnv *env, jobject thi
		device->discardEventRequest(seq);
		}

		static jlong android_mtp_MtpDevice_get_object_size_long(
		JNIEnv *env, jobject thiz, jint handle, jint format) {
		MtpDevice* const device = get_device_from_object(env, thiz);
		if (!device) {
		env->ThrowNew(clazz_io_exception, "Failed to obtain MtpDevice.");
		return 0;
		}

		std::unique_ptr<MtpProperty> property(
		device->getObjectPropDesc(MTP_PROPERTY_OBJECT_SIZE, format));
		if (!property) {
		env->ThrowNew(clazz_io_exception, "Failed to obtain property desc.");
		return 0;
		}

		if (property->getDataType() != MTP_TYPE_UINT64) {
		env->ThrowNew(clazz_io_exception, "Unexpected property data type.");
		return 0;
		}

		if (!device->getObjectPropValue(handle, property.get())) {
		env->ThrowNew(clazz_io_exception, "Failed to obtain property value.");
		return 0;
		}

		const jlong object_size = static_cast<jlong>(property->getCurrentValue().u.u64);
		if (object_size < 0) {
		env->ThrowNew(clazz_io_exception, "Object size is too large to express as jlong.");
		return 0;
		}

		return object_size;
		}

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

		static const JNINativeMethod gMethods[] = {
		@@ -733,6 +768,8 @@ static const JNINativeMethod gMethods[] = {
		{"native_reap_event_request", "(I)Landroid/mtp/MtpEvent;",
		(void *)android_mtp_MtpDevice_reap_event_request},
		{"native_discard_event_request", "(I)V", (void *)android_mtp_MtpDevice_discard_event_request},

		{"native_get_object_size_long", "(II)J", (void *)android_mtp_MtpDevice_get_object_size_long},
		};

		int register_android_mtp_MtpDevice(JNIEnv *env)