Merge "MidiFramer: Add support for SysEx messages" into mnc-dev (986da92b) · Commits · e / os / android_frameworks_base

core/java/com/android/internal/midi/MidiFramer.java

+39 −12

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		package com.android.internal.midi;

		import android.media.midi.MidiReceiver;
		import android.util.Log;

		import java.io.IOException;

		@@ -38,6 +39,7 @@ public class MidiFramer extends MidiReceiver {
		private int mCount;
		private int mRunningStatus;
		private int mNeeded;
		private boolean mInSysEx;

		public MidiFramer(MidiReceiver receiver) {
		mReceiver = receiver;
		@@ -52,12 +54,14 @@ public class MidiFramer extends MidiReceiver {
		}

		/*
		* @see android.midi.MidiReceiver#onPost(byte[], int, int, long)
		* @see android.midi.MidiReceiver#onReceive(byte[], int, int, long)
		*/
		@Override
		public void onReceive(byte[] data, int offset, int count, long timestamp)
		throws IOException {
		// Log.i(TAG, formatMidiData(data, offset, count));
		int sysExStartOffset = (mInSysEx ? offset : -1);

		for (int i = 0; i < count; i++) {
		int b = data[offset] & 0xFF;
		if (b >= 0x80) { // status byte?
		@@ -66,15 +70,31 @@ public class MidiFramer extends MidiReceiver {
		mCount = 1;
		mNeeded = MidiConstants.getBytesPerMessage(b) - 1;
		} else if (b < 0xF8) { // system common?
		if (b == 0xF0 /* SysEx Start */) {
		// Log.i(TAG, "SysEx Start");
		mInSysEx = true;
		sysExStartOffset = offset;
		} else if (b == 0xF7 /* SysEx End */) {
		// Log.i(TAG, "SysEx End");
		if (mInSysEx) {
		mReceiver.sendWithTimestamp(data, sysExStartOffset,
		offset - sysExStartOffset, timestamp);
		mInSysEx = false;
		sysExStartOffset = -1;
		}
		} else {
		mBuffer[0] = (byte) b;
		mRunningStatus = 0;
		mCount = 1;
		mNeeded = MidiConstants.getBytesPerMessage(b) - 1;
		}
		} else { // real-time?
		// Single byte message interleaved with other data.
		mReceiver.sendWithTimestamp(data, offset, 1, timestamp);
		}
		} else { // data byte
		// Save SysEx data for SysEx End marker or end of buffer.
		if (!mInSysEx) {
		mBuffer[mCount++] = (byte) b;
		if (--mNeeded == 0) {
		if (mRunningStatus != 0) {
		@@ -85,8 +105,15 @@ public class MidiFramer extends MidiReceiver {
		mCount = 1;
		}
		}
		}
		++offset;
		}

		// send any accumulatedSysEx data
		if (sysExStartOffset >= 0) {
		mReceiver.sendWithTimestamp(data, sysExStartOffset,
		offset - sysExStartOffset, timestamp);
		}
		}

		}