rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 109 insertions, 0 deletions

diff --git a/libs/ardour/ardour/sndfilesource.h b/libs/ardour/ardour/sndfilesource.h
new file mode 100644
index 0000000000..4ad967c132
--- /dev/null
+++ b/libs/ardour/ardour/sndfilesource.h
@@ -0,0 +1,109 @@
+/*
+    Copyright (C) 2006 Paul Davis 
+
+    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 __sndfile_source_h__ 
+#define __sndfile_source_h__
+
+#include <sndfile.h>
+
+#include <ardour/audiofilesource.h>
+
+namespace ARDOUR {
+
+class SndFileSource : public AudioFileSource {
+  public:
+	/* constructor to be called for existing external-to-session files */
+
+        SndFileSource (Session&, Glib::ustring path, int chn, Flag flags);
+
+	/* constructor to be called for new in-session files */
+
+	SndFileSource (Session&, Glib::ustring path, SampleFormat samp_format, HeaderFormat hdr_format, nframes_t rate, 
+		       Flag flags = SndFileSource::default_writable_flags);
+		       
+	/* constructor to be called for existing in-session files */
+	
+	SndFileSource (Session&, const XMLNode&);
+
+	~SndFileSource ();
+
+	float sample_rate () const;
+	int update_header (nframes_t when, struct tm&, time_t);
+	int flush_header ();
+
+	nframes_t natural_position () const;
+
+	nframes_t last_capture_start_frame() const;
+	void mark_capture_start (nframes_t);
+	void mark_capture_end ();
+	void clear_capture_marks();
+
+	bool set_destructive (bool yn);
+
+	bool one_of_several_channels () const;
+
+	static void setup_standard_crossfades (nframes_t sample_rate);
+	static const AudioFileSource::Flag default_writable_flags;
+
+	static int get_soundfile_info (const Glib::ustring& path, SoundFileInfo& _info, string& error_msg);
+
+  protected:
+	void set_header_timeline_position ();
+
+	nframes_t read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const;
+	nframes_t write_unlocked (Sample *dst, nframes_t cnt);
+
+	nframes_t write_float (Sample* data, nframes_t pos, nframes_t cnt);
+
+  private:
+	SNDFILE *sf;
+	SF_INFO _info;
+	SF_BROADCAST_INFO *_broadcast_info;
+
+	void init ();
+	int open();
+	int setup_broadcast_info (nframes_t when, struct tm&, time_t);
+
+	/* destructive */
+
+	static nframes_t xfade_frames;
+	static gain_t* out_coefficient;
+	static gain_t* in_coefficient;
+
+	bool          _capture_start;
+	bool          _capture_end;
+	nframes_t      capture_start_frame;
+	nframes_t      file_pos; // unit is frames
+	nframes_t      xfade_out_count;
+	nframes_t      xfade_in_count;
+	Sample*        xfade_buf;
+
+	nframes_t crossfade (Sample* data, nframes_t cnt, int dir);
+	void set_timeline_position (int64_t);
+	nframes_t destructive_write_unlocked (Sample *dst, nframes_t cnt);
+	nframes_t nondestructive_write_unlocked (Sample *dst, nframes_t cnt);
+	void handle_header_position_change ();
+
+	static int64_t get_timecode_info (SNDFILE* sf, SF_BROADCAST_INFO* binfo, bool& exists);
+};
+
+} // namespace ARDOUR
+
+#endif /* __sndfile_source_h__ */
+