1 files changed, 144 insertions, 0 deletions
diff --git a/libs/ardour/ardour/export_file_io.h b/libs/ardour/ardour/export_file_io.h
new file mode 100644
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+++ b/libs/ardour/ardour/export_file_io.h
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+/*
+    Copyright (C) 2008 Paul Davis
+    Author: Sakari Bergen
+
+    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_export_file_io_h__
+#define __ardour_export_file_io_h__
+
+#include <sndfile.h>
+
+#include <ardour/graph.h>
+#include <ardour/types.h>
+#include <ardour/ardour.h>
+
+namespace ARDOUR
+{
+
+/// Common part for all export file writers
+class ExportFileWriter
+{
+  public:
+	ExportFileWriter (string filename) : _filename (filename) {}
+	virtual ~ExportFileWriter () {}
+	
+	string filename () const { return _filename; }
+	nframes_t position () const { return _position; }
+	
+	void set_position (nframes_t position) { _position = position; }
+	
+  protected:
+	string _filename;
+	nframes_t _position;
+};
+
+/// Common interface for templated libsndfile writers
+class SndfileWriterBase : public ExportFileWriter
+{
+  public:
+	SndfileWriterBase (int channels, nframes_t samplerate, int format, string const & path);
+	virtual ~SndfileWriterBase ();
+
+	SNDFILE * get_sndfile () const { return sndfile; }
+
+  protected:
+	SF_INFO        sf_info;
+	SNDFILE *      sndfile;
+};
+
+
+/// Template parameter specific parts of sndfile writer
+template <typename T>
+class SndfileWriter : public SndfileWriterBase, public GraphSink<T>
+{
+  public:
+	SndfileWriter (int channels, nframes_t samplerate, int format, string const & path);
+	virtual ~SndfileWriter () {}
+	
+	nframes_t write (T * data, nframes_t frames);
+	
+  protected:
+	sf_count_t (*write_func)(SNDFILE *, const T *, sf_count_t);
+
+  private:
+	void init (); // Inits write function
+};
+
+/// Writes and reads a RAW tempfile (file aquired with tmpfile())
+class ExportTempFile : public SndfileWriter<float>, public GraphSource<float>
+{
+  public:
+	ExportTempFile (uint32_t channels, nframes_t samplerate);
+	~ExportTempFile () {}
+	
+	/// Causes the file to be read from the beginning again
+	void reset_read () { reading = false; }
+	nframes_t read (float * data, nframes_t frames);
+	
+	/* Silence management */
+	
+	nframes_t trim_beginning (bool yn = true);
+	nframes_t trim_end (bool yn = true);
+	
+	void set_silence_beginning (nframes_t frames);
+	void set_silence_end (nframes_t frames);
+
+  private:
+	/* File access */
+	
+	sf_count_t get_length ();
+	sf_count_t get_position ();
+	sf_count_t get_read_position (); // get position seems to default to the write pointer
+	sf_count_t locate_to (nframes_t frames);
+	sf_count_t _read (float * data, nframes_t frames);
+	
+	uint32_t channels;
+	bool reading;
+	
+	/* Silence related */
+	
+	/* start and end are used by read() */
+	
+	nframes_t start;
+	nframes_t end;
+	
+	/* these are the silence processing results and state */
+	
+	void process_beginning ();
+	void process_end ();
+	
+	bool beginning_processed;
+	bool end_processed;
+	
+	nframes_t silent_frames_beginning;
+	nframes_t silent_frames_end;
+	
+	/* Silence to add to start and end */
+	
+	nframes_t silence_beginning;
+	nframes_t silence_end;
+	
+	/* Takes care that the end postion gets set at some stage */
+	
+	bool end_set;
+	
+};
+
+} // namespace ARDOUR
+
+#endif /* __ardour_export_file_io_h__ */