MtpDatabase: Implement getObjectProperty (b2cada90) · Commits · e / os / android_frameworks_base

media/java/android/media/MtpDatabase.java

+83 −2

Original line number	Diff line number	Diff line
		@@ -36,6 +36,9 @@ public class MtpDatabase {
		private final String mVolumeName;
		private final Uri mObjectsUri;

		// FIXME - this should be passed in via the constructor
		private final int mStorageID = 0x00010001;

		private static final String[] ID_PROJECTION = new String[] {
		MtpObjects.ObjectColumns._ID, // 0
		};
		@@ -60,6 +63,20 @@ public class MtpDatabase {

		private final MediaScanner mMediaScanner;

		// MTP property codes
		private static final int MTP_PROPERTY_STORAGE_ID = 0xDC01;
		private static final int MTP_PROPERTY_OBJECT_FORMAT = 0xDC02;
		private static final int MTP_PROPERTY_OBJECT_SIZE = 0xDC04;
		private static final int MTP_PROPERTY_OBJECT_FILE_NAME = 0xDC07;
		private static final int MTP_PROPERTY_DATE_MODIFIED = 0xDC09;
		private static final int MTP_PROPERTY_PARENT_OBJECT = 0xDC0B;

		// MTP response codes
		private static final int MTP_RESPONSE_OK = 0x2001;
		private static final int MTP_RESPONSE_GENERAL_ERROR = 0x2002;
		private static final int MTP_RESPONSE_INVALID_OBJECT_HANDLE = 0x2009;
		private static final int MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED = 0xA80A;

		static {
		System.loadLibrary("media_jni");
		}
		@@ -150,7 +167,71 @@ public class MtpDatabase {
		private int getObjectProperty(int handle, int property,
		long[] outIntValue, char[] outStringValue) {
		Log.d(TAG, "getObjectProperty: " + property);
		return 0;
		String column = null;
		boolean isString = false;

		switch (property) {
		case MTP_PROPERTY_STORAGE_ID:
		outIntValue[0] = mStorageID;
		return MTP_RESPONSE_OK;
		case MTP_PROPERTY_OBJECT_FORMAT:
		column = MtpObjects.ObjectColumns.FORMAT;
		break;
		case MTP_PROPERTY_OBJECT_SIZE:
		column = MtpObjects.ObjectColumns.SIZE;
		break;
		case MTP_PROPERTY_OBJECT_FILE_NAME:
		column = MtpObjects.ObjectColumns.DATA;
		isString = true;
		break;
		case MTP_PROPERTY_DATE_MODIFIED:
		column = MtpObjects.ObjectColumns.DATE_MODIFIED;
		break;
		case MTP_PROPERTY_PARENT_OBJECT:
		column = MtpObjects.ObjectColumns.PARENT;
		break;
		default:
		return MTP_RESPONSE_OBJECT_PROP_NOT_SUPPORTED;
		}

		Cursor c = null;
		try {
		// for now we are only reading properties from the "objects" table
		c = mMediaProvider.query(mObjectsUri,
		new String [] { MtpObjects.ObjectColumns._ID, column },
		ID_WHERE, new String[] { Integer.toString(handle) }, null);
		if (c != null && c.moveToNext()) {
		if (isString) {
		String value = c.getString(1);
		int start = 0;

		if (property == MTP_PROPERTY_OBJECT_FILE_NAME) {
		// extract name from full path
		int lastSlash = value.lastIndexOf('/');
		if (lastSlash >= 0) {
		start = lastSlash + 1;
		}
		}
		int end = value.length();
		if (end - start > 255) {
		end = start + 255;
		}
		value.getChars(start, end, outStringValue, 0);
		outStringValue[end - start] = 0;
		} else {
		outIntValue[0] = c.getLong(1);
		}
		return MTP_RESPONSE_OK;
		}
		} catch (Exception e) {
		return MTP_RESPONSE_GENERAL_ERROR;
		} finally {
		if (c != null) {
		c.close();
		}
		}
		// query failed if we get here
		return MTP_RESPONSE_INVALID_OBJECT_HANDLE;
		}

		private boolean getObjectInfo(int handle, int[] outStorageFormatParent,
		@@ -161,7 +242,7 @@ public class MtpDatabase {
		c = mMediaProvider.query(mObjectsUri, OBJECT_INFO_PROJECTION,
		ID_WHERE, new String[] { Integer.toString(handle) }, null);
		if (c != null && c.moveToNext()) {
		outStorageFormatParent[0] = 0x00010001;
		outStorageFormatParent[0] = mStorageID;
		outStorageFormatParent[1] = c.getInt(2);
		outStorageFormatParent[2] = c.getInt(3);