Merge "CEC : Add validity check methods for some common operands" (75ec2dae) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/hdmi/HdmiCecMessageValidator.java

+72 −0

Original line number	Diff line number	Diff line
		@@ -343,6 +343,78 @@ public class HdmiCecMessageValidator {
		return true;
		}

		/**
		* Check if the given value is a valid day of month. A valid value is one which falls within the
		* range description defined in CEC 1.4 Specification : Operand Descriptions (Section 17)
		*
		* @param value day of month
		* @return true if the day of month is valid
		*/
		private boolean isValidDayOfMonth(int value) {
		return isWithinRange(value, 1, 31);
		}

		/**
		* Check if the given value is a valid month of year. A valid value is one which falls within
		* the range description defined in CEC 1.4 Specification : Operand Descriptions (Section 17)
		*
		* @param value month of year
		* @return true if the month of year is valid
		*/
		private boolean isValidMonthOfYear(int value) {
		return isWithinRange(value, 1, 12);
		}

		/**
		* Check if the given value is a valid hour. A valid value is one which falls within the range
		* description defined in CEC 1.4 Specification : Operand Descriptions (Section 17)
		*
		* @param value hour
		* @return true if the hour is valid
		*/
		private boolean isValidHour(int value) {
		return isWithinRange(value, 0, 23);
		}

		/**
		* Check if the given value is a valid minute. A valid value is one which falls within the range
		* description defined in CEC 1.4 Specification : Operand Descriptions (Section 17)
		*
		* @param value minute
		* @return true if the minute is valid
		*/
		private boolean isValidMinute(int value) {
		return isWithinRange(value, 0, 59);
		}

		/**
		* Check if the given value is a valid duration hours. A valid value is one which falls within
		* the range description defined in CEC 1.4 Specification : Operand Descriptions (Section 17)
		*
		* @param value duration hours
		* @return true if the duration hours is valid
		*/
		private boolean isValidDurationHours(int value) {
		return isWithinRange(value, 0, 99);
		}

		/**
		* Check if the given value is a valid recording sequence. A valid value is adheres to range
		* description defined in CEC 1.4 Specification : Operand Descriptions (Section 17)
		*
		* @param value recording sequence
		* @return true if the given recording sequence is valid
		*/
		private boolean isValidRecordingSequence(int value) {
		value = value & 0xFF;
		// Validate bit 7 is set to zero
		if ((value & 0x80) != 0x00) {
		return false;
		}
		// Validate than not more than one bit is set
		return (Integer.bitCount(value) <= 1);
		}

		private class PhysicalAddressValidator implements ParameterValidator {
		@Override
		public int isValid(byte[] params) {