prepare LTC File Reader

1 files changed, 72 insertions, 0 deletions

diff --git a/libs/ardour/ardour/ltc_file_reader.h b/libs/ardour/ardour/ltc_file_reader.h
new file mode 100644
index 0000000000..92ea07f87f
--- /dev/null
+++ b/libs/ardour/ardour/ltc_file_reader.h
@@ -0,0 +1,72 @@
+/*
+    Copyright (C) 2015 Robin Gareus <robin@gareus.org>
+
+    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 __libardour_ltc_file_reader_h__
+#define __libardour_ltc_file_reader_h__
+
+#include <vector>
+#include <sndfile.h>
+
+#include <ltc.h>
+
+#include "ardour/libardour_visibility.h"
+#include "ardour/types.h"
+
+namespace ARDOUR {
+
+class LIBARDOUR_API LTCFileReader
+{
+public:
+	struct LTCMap {
+		double framepos_sec; // relative to start of file
+		double timecode_sec; // timecode
+
+		LTCMap (double p, double t) {
+			framepos_sec = p;
+			timecode_sec = t;
+		}
+	};
+
+	LTCFileReader (std::string path, double expected_fps, LTC_TV_STANDARD tv_standard = LTC_TV_FILM_24);
+	~LTCFileReader ();
+
+	uint32_t channels () const { return _info.channels; }
+	std::vector<LTCMap> read_ltc (uint32_t channel, uint32_t max_frames = 1);
+
+private:
+	int open();
+	void close ();
+
+	std::string _path;
+
+	double          _expected_fps;
+	LTC_TV_STANDARD _ltc_tv_standard;
+
+	SNDFILE* _sndfile;
+	SF_INFO  _info;
+
+	LTCDecoder*  decoder;
+	float*      _interleaved_audio_buffer;
+	uint32_t    _frames_decoded;
+	framecnt_t  _samples_read;
+
+};
+
+} // namespace ARDOUR
+
+#endif /* __libardour_ltc_file_reader_h__ */