content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.example.android.midiscope;
  
  import android.media.midi.MidiDeviceInfo;
  import android.media.midi.MidiDeviceInfo.PortInfo;
  import android.os.Bundle;
  
  import com.example.android.common.midi.MidiConstants;
  
  /**
   * Format a MIDI message for printing.
   */
  public class MidiPrinter {
  
      public static final String[] CHANNEL_COMMAND_NAMES = { "NoteOff", "NoteOn",
              "PolyTouch", "Control", "Program", "Pressure", "Bend" };
      public static final String[] SYSTEM_COMMAND_NAMES = { "SysEx", // F0
              "TimeCode",    // F1
              "SongPos",     // F2
              "SongSel",     // F3
              "F4",          // F4
              "F5",          // F5
              "TuneReq",     // F6
              "EndSysex",    // F7
              "TimingClock", // F8
              "F9",          // F9
              "Start",       // FA
              "Continue",    // FB
              "Stop",        // FC
              "FD",          // FD
              "ActiveSensing", // FE
              "Reset"        // FF
      };
  
      public static String getName(int status) {
          if (status >= 0xF0) {
              int index = status & 0x0F;
              return SYSTEM_COMMAND_NAMES[index];
          } else if (status >= 0x80) {
              int index = (status >> 4) & 0x07;
              return CHANNEL_COMMAND_NAMES[index];
          } else {
              return "data";
          }
      }
  
      public static String formatBytes(byte[] data, int offset, int count) {
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < count; i++) {
              sb.append(String.format(" %02X", data[offset + i]));
          }
          return sb.toString();
      }
  
      public static String formatMessage(byte[] data, int offset) {
          StringBuilder sb = new StringBuilder();
          byte statusByte = data[offset++];
          int status = statusByte & 0xFF;
          sb.append(getName(status)).append("(");
          int numData = MidiConstants.getBytesPerMessage(statusByte) - 1;
          if ((status >= 0x80) && (status < 0xF0)) { // channel message
              int channel = status & 0x0F;
              // Add 1 for humans who think channels are numbered 1-16.
              sb.append((channel + 1)).append(", ");
          }
          for (int i = 0; i < numData; i++) {
              if (i > 0) {
                  sb.append(", ");
              }
              sb.append(data[offset++]);
          }
          sb.append(")");
          return sb.toString();
      }
  
      public static String formatDeviceInfo(MidiDeviceInfo info) {
          StringBuilder sb = new StringBuilder();
          if (info != null) {
              Bundle properties = info.getProperties();
              for (String key : properties.keySet()) {
                  Object value = properties.get(key);
                  sb.append(key).append(" = ").append(value).append('\n');
              }
              for (PortInfo port : info.getPorts()) {
                  sb.append((port.getType() == PortInfo.TYPE_INPUT) ? "input" : "output")
                          .append("[")
                          .append(port.getPortNumber())
                          .append("] = \"")
                          .append(port.getName()).append("\"\n");
              }
          }
          return sb.toString();
      }
  }
  