1 files changed, 87 insertions, 0 deletions
diff --git a/libs/ardour/ardour/smf_reader.h b/libs/ardour/ardour/smf_reader.h
new file mode 100644
index 0000000000..e41dcc3bc4
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+++ b/libs/ardour/ardour/smf_reader.h
@@ -0,0 +1,87 @@
+/*
+    Copyright (C) 2008 Paul Davis 
+    Written by Dave Robillard
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __ardour_smf_reader_h__ 
+#define __ardour_smf_reader_h__
+
+#include <exception>
+#include <stdexcept>
+#include <string>
+#include <inttypes.h>
+
+namespace ARDOUR {
+
+
+/** Standard MIDI File (Type 0) Reader
+ *
+ * Currently this only reads SMF files with tempo-based timing.
+ */
+class SMFReader {
+public:
+	class PrematureEOF : public std::exception {
+		const char* what() const throw() { return "Unexpected end of file"; }
+	};
+	class CorruptFile : public std::exception {
+		const char* what() const throw() { return "Corrupted file"; }
+	};
+	class UnsupportedTime : public std::exception {
+		const char* what() const throw() { return "Unsupported time stamp type (SMPTE)"; }
+	};
+
+	SMFReader(const std::string filename="");
+	~SMFReader();
+
+	bool open(const std::string& filename) throw (std::logic_error, UnsupportedTime);
+
+	bool seek_to_track(unsigned track) throw (std::logic_error);
+	
+	const std::string& filename() const { return _filename; };
+
+	uint16_t type()       const { return _type; }
+	uint16_t ppqn()       const { return _ppqn; }
+	uint16_t num_tracks() const { return _num_tracks; }
+	
+	int read_event(size_t    buf_len,
+	               uint8_t*  buf,
+	               uint32_t* ev_size,
+	               uint32_t* ev_delta_time)
+		throw (std::logic_error, PrematureEOF, CorruptFile);
+	
+	void close();
+	
+	static uint32_t read_var_len(FILE* fd) throw (PrematureEOF);
+
+protected:
+	/** size of SMF header, including MTrk chunk header */
+	static const uint32_t HEADER_SIZE = 22;
+
+	std::string _filename;
+	FILE*       _fd;
+	uint16_t    _type;
+	uint16_t    _ppqn;
+	uint16_t    _num_tracks;
+	uint32_t    _track;
+	uint32_t    _track_size;
+};
+
+
+} // namespace ARDOUR
+
+#endif /* __ardour_smf_reader_h__ */
+