Add MidiReceiver.send() and MidiReceiver.getMaxMessageSize() (0c7342f0) · Commits · e / os / android_frameworks_base

media/java/android/media/midi/MidiDispatcher.java

+2 −2

Original line number	Diff line number	Diff line
		@@ -75,9 +75,9 @@ public final class MidiDispatcher extends MidiReceiver {
		public void receive(byte[] msg, int offset, int count, long timestamp) throws IOException {
		for (MidiReceiver receiver : mReceivers) {
		try {
		receiver.receive(msg, offset, count, timestamp);
		receiver.send(msg, offset, count, timestamp);
		} catch (IOException e) {
		// if the receiver fails we remove the receiver but do not propogate the exception
		// if the receiver fails we remove the receiver but do not propagate the exception
		mReceivers.remove(receiver);
		}
		}

+13 −10

Original line number	Diff line number	Diff line
		@@ -81,19 +81,22 @@ public final class MidiInputPort extends MidiReceiver implements Closeable {
		* {@link java.lang.System#nanoTime}
		*/
		public void receive(byte[] msg, int offset, int count, long timestamp) throws IOException {
		assert(offset >= 0 && count >= 0 && offset + count <= msg.length);
		if (offset < 0 \|\| count < 0 \|\| offset + count > msg.length) {
		throw new IllegalArgumentException("offset or count out of range");
		}
		if (count > MidiPortImpl.MAX_PACKET_DATA_SIZE) {
		throw new IllegalArgumentException("count exceeds max message size");
		}

		synchronized (mBuffer) {
		while (count > 0) {
		int length = MidiPortImpl.packMessage(msg, offset, count, timestamp, mBuffer);
		mOutputStream.write(mBuffer, 0, length);
		int sent = MidiPortImpl.getMessageSize(mBuffer, length);
		assert(sent >= 0 && sent <= length);

		offset += sent;
		count -= sent;
		}
		}

		@Override
		public int getMaxMessageSize() {
		return MidiPortImpl.MAX_PACKET_DATA_SIZE;
		}

		@Override

+1 −1

Original line number	Diff line number	Diff line
		@@ -68,7 +68,7 @@ public final class MidiOutputPort extends MidiSender implements Closeable {
		long timestamp = MidiPortImpl.getMessageTimeStamp(buffer, count);

		// dispatch to all our receivers
		mDispatcher.receive(buffer, offset, size, timestamp);
		mDispatcher.send(buffer, offset, size, timestamp);
		}
		} catch (IOException e) {
		// FIXME report I/O failure?

+31 −0

Original line number	Diff line number	Diff line
		@@ -27,6 +27,7 @@ import java.io.IOException;
		abstract public class MidiReceiver {
		/**
		* Called to pass MIDI data to the receiver.
		* May fail if count exceeds {@link getMaxMessageSize}.
		*
		* NOTE: the msg array parameter is only valid within the context of this call.
		* The msg bytes should be copied by the receiver rather than retaining a reference
		@@ -42,4 +43,34 @@ abstract public class MidiReceiver {
		*/
		abstract public void receive(byte[] msg, int offset, int count, long timestamp)
		throws IOException;

		/**
		* Returns the maximum size of a message this receiver can receive.
		* Defaults to {@link java.lang.Integer#MAX_VALUE} unless overridden.
		* @return maximum message size
		*/
		public int getMaxMessageSize() {
		return Integer.MAX_VALUE;
		}

		/**
		* Called to send MIDI data to the receiver
		* Data will get split into multiple calls to {@link receive} if count exceeds
		* {@link getMaxMessageSize}.
		*
		* @param msg a byte array containing the MIDI data
		* @param offset the offset of the first byte of the data in the byte array
		* @param count the number of bytes of MIDI data in the array
		* @param timestamp the timestamp of the message (based on {@link java.lang.System#nanoTime}
		* @throws IOException
		*/
		public void send(byte[] msg, int offset, int count, long timestamp) throws IOException {
		int messageSize = getMaxMessageSize();
		while (count > 0) {
		int length = (count > messageSize ? messageSize : count);
		receive(msg, offset, length, timestamp);
		offset += length;
		count -= length;
		}
		}
		}

+1 −1

Original line number	Diff line number	Diff line
		@@ -144,7 +144,7 @@ public final class UsbMidiDevice implements Closeable {

		int count = mInputStreams[index].read(buffer);
		long timestamp = System.nanoTime();
		outputReceivers[index].receive(buffer, 0, count, timestamp);
		outputReceivers[index].send(buffer, 0, count, timestamp);
		} else if ((pfd.revents & (OsConstants.POLLERR
		\| OsConstants.POLLHUP)) != 0) {
		done = true;