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/*
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"
#include "ardour/broadcast_info.h"
#include "ardour/progress.h"
namespace ARDOUR {
class LIBARDOUR_API SndFileSource : public AudioFileSource {
public:
/** Constructor to be called for existing external-to-session files */
SndFileSource (Session&, const std::string& path, int chn, Flag flags);
/* Constructor to be called for new in-session files */
SndFileSource (Session&, const std::string& path, const std::string& origin,
SampleFormat samp_format, HeaderFormat hdr_format, framecnt_t rate,
Flag flags = SndFileSource::default_writable_flags);
/* Constructor to be called for recovering files being used for
* capture. They are in-session, they already exist, they should not
* be writable. They are an odd hybrid (from a constructor point of
* view) of the previous two constructors.
*/
SndFileSource (Session&, const std::string& path, int chn);
/** Constructor to be called for existing in-session files during
* session loading
*/
SndFileSource (Session&, const XMLNode&);
/** Constructor to losslessly compress existing source */
SndFileSource (Session& s, const AudioFileSource& other, const std::string& path, bool use16bits = false, Progress* p = NULL);
~SndFileSource ();
float sample_rate () const;
int update_header (framepos_t when, struct tm&, time_t);
int flush_header ();
void flush ();
framepos_t natural_position () const;
framepos_t last_capture_start_frame() const;
void mark_capture_start (framepos_t);
void mark_capture_end ();
void clear_capture_marks();
bool set_destructive (bool yn);
bool one_of_several_channels () const;
uint32_t channel_count () const { return _info.channels; }
bool clamped_at_unity () const;
static void setup_standard_crossfades (Session const &, framecnt_t sample_rate);
static const Source::Flag default_writable_flags;
static int get_soundfile_info (const std::string& path, SoundFileInfo& _info, std::string& error_msg);
protected:
void close ();
void set_path (const std::string& p);
void set_header_timeline_position ();
framecnt_t read_unlocked (Sample *dst, framepos_t start, framecnt_t cnt) const;
framecnt_t write_unlocked (Sample *dst, framecnt_t cnt);
framecnt_t write_float (Sample* data, framepos_t pos, framecnt_t cnt);
private:
SNDFILE* _sndfile;
SF_INFO _info;
BroadcastInfo *_broadcast_info;
void init_sndfile ();
int open();
int setup_broadcast_info (framepos_t when, struct tm&, time_t);
void file_closed ();
/* destructive */
static framecnt_t xfade_frames;
static gain_t* out_coefficient;
static gain_t* in_coefficient;
bool _capture_start;
bool _capture_end;
framepos_t capture_start_frame;
framepos_t file_pos; // unit is frames
Sample* xfade_buf;
framecnt_t crossfade (Sample* data, framecnt_t cnt, int dir);
void set_timeline_position (framepos_t);
framecnt_t destructive_write_unlocked (Sample *dst, framecnt_t cnt);
framecnt_t nondestructive_write_unlocked (Sample *dst, framecnt_t cnt);
void handle_header_position_change ();
PBD::ScopedConnection header_position_connection;
};
} // namespace ARDOUR
#endif /* __sndfile_source_h__ */
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