text: //
  // MidiSource.c - MrsWatson
  // Copyright (c) 2016 Teragon Audio. All rights reserved.
  //
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are met:
  //
  // * Redistributions of source code must retain the above copyright notice,
  //   this list of conditions and the following disclaimer.
  // * Redistributions in binary form must reproduce the above copyright notice,
  //   this list of conditions and the following disclaimer in the documentation
  //   and/or other materials provided with the distribution.
  //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  // ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  // LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  // CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  // SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  // CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  // POSSIBILITY OF SUCH DAMAGE.
  //
  
  #include "MidiSource.h"
  
  #include "base/File.h"
  #include "logging/EventLogger.h"
  #include "midi/MidiSourceFile.h"
  
  #include <stdio.h>
  #include <stdlib.h>
  
  MidiSourceType guessMidiSourceType(const CharString midiSourceTypeString) {
    if (!charStringIsEmpty(midiSourceTypeString)) {
      File midiSourceFile = newFileWithPath(midiSourceTypeString);
      CharString fileExtension = fileGetExtension(midiSourceFile);
      freeFile(midiSourceFile);
  
      if (fileExtension == NULL) {
        return MIDI_SOURCE_TYPE_INVALID;
      } else if (charStringIsEqualToCString(fileExtension, "mid", true) ||
                 charStringIsEqualToCString(fileExtension, "midi", true)) {
        freeCharString(fileExtension);
        return MIDI_SOURCE_TYPE_FILE;
      } else {
        logCritical("MIDI source '%s' does not match any supported type");
        freeCharString(fileExtension);
        return MIDI_SOURCE_TYPE_INVALID;
      }
    } else {
      logInternalError("MIDI source type was null");
      return MIDI_SOURCE_TYPE_INVALID;
    }
  }
  
  MidiSource newMidiSource(MidiSourceType midiSourceType,
                           const CharString midiSourceName) {
    switch (midiSourceType) {
    case MIDI_SOURCE_TYPE_FILE:
      return newMidiSourceFile(midiSourceName);
  
    default:
      return NULL;
    }
  }
  
  void freeMidiSource(MidiSource self) {
    if (self != NULL) {
      self->freeMidiSourceData(self->extraData);
      freeCharString(self->sourceName);
      free(self);
    }
  }
  