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Sanity checking on MIDI data format

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This commit is contained in:
Michael Becker 2014-06-09 11:14:51 -04:00
parent 7ea1f65cc8
commit c42f66db2d
1 changed files with 4 additions and 0 deletions
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4
CSharp/Plugins/UniversalEditor.Plugins.Multimedia/DataFormats/Multimedia/Audio/Synthesized/MIDI/MIDIDataFormat.cs
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@ -19,6 +19,8 @@ namespace UniversalEditor.DataFormats.Multimedia.Audio.Synthesized.MIDI
br.Endianness = Endianness.BigEndian;
SynthesizedAudioObjectModel syn = objectModel as SynthesizedAudioObjectModel;
string MThd = br.ReadFixedLengthString(4);
if (MThd != "MThd") throw new InvalidDataFormatException("File does not begin with \"MThd\"");
int headerSize = br.ReadInt32();
short fileFormat = br.ReadInt16();
short trackCount = br.ReadInt16();
@ -26,6 +28,8 @@ namespace UniversalEditor.DataFormats.Multimedia.Audio.Synthesized.MIDI
for (short i = 0; i < trackCount; i += 1)
{
string MTrk = br.ReadFixedLengthString(4);
if (MTrk != "MTrk") throw new InvalidDataFormatException("Could not read track " + (trackCount + 1).ToString() + " - does not begin with \"MTrk\"");
int trackLength = br.ReadInt32();
SynthesizedAudioTrack track = new SynthesizedAudioTrack();
long position = br.Accessor.Position;