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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__ */
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