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/*
Copyright (C) 2000 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 __ardour_audio_source_h__
#define __ardour_audio_source_h__
#include <boost/shared_ptr.hpp>
#include <boost/shared_array.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <time.h>
#include <glibmm/threads.h>
#include <boost/function.hpp>
#include <boost/scoped_array.hpp>
#include "ardour/source.h"
#include "ardour/ardour.h"
#include "ardour/readable.h"
#include "pbd/stateful.h"
#include "pbd/xml++.h"
namespace ARDOUR {
class LIBARDOUR_API AudioSource : virtual public Source,
public ARDOUR::Readable,
public boost::enable_shared_from_this<ARDOUR::AudioSource>
{
public:
AudioSource (Session&, const std::string& name);
AudioSource (Session&, const XMLNode&);
virtual ~AudioSource ();
samplecnt_t readable_length() const { return _length; }
virtual uint32_t n_channels() const { return 1; }
virtual bool empty() const;
samplecnt_t length (samplepos_t pos) const;
void update_length (samplecnt_t cnt);
virtual samplecnt_t available_peaks (double zoom) const;
virtual samplecnt_t read (Sample *dst, samplepos_t start, samplecnt_t cnt, int channel=0) const;
virtual samplecnt_t write (Sample *src, samplecnt_t cnt);
virtual float sample_rate () const = 0;
virtual void mark_streaming_write_completed (const Lock& lock);
virtual bool can_truncate_peaks() const { return true; }
void set_captured_for (std::string str) { _captured_for = str; }
std::string captured_for() const { return _captured_for; }
int read_peaks (PeakData *peaks, samplecnt_t npeaks,
samplepos_t start, samplecnt_t cnt, double samples_per_visual_peak) const;
int build_peaks ();
bool peaks_ready (boost::function<void()> callWhenReady, PBD::ScopedConnection** connection_created_if_not_ready, PBD::EventLoop* event_loop) const;
mutable PBD::Signal0<void> PeaksReady;
mutable PBD::Signal2<void,samplepos_t,samplepos_t> PeakRangeReady;
XMLNode& get_state ();
int set_state (const XMLNode&, int version);
int rename_peakfile (std::string newpath);
void touch_peakfile ();
static void set_build_missing_peakfiles (bool yn) {
_build_missing_peakfiles = yn;
}
static void set_build_peakfiles (bool yn) {
_build_peakfiles = yn;
}
static bool get_build_peakfiles () {
return _build_peakfiles;
}
virtual int setup_peakfile () { return 0; }
int close_peakfile ();
int prepare_for_peakfile_writes ();
void done_with_peakfile_writes (bool done = true);
/** @return true if the each source sample s must be clamped to -1 < s < 1 */
virtual bool clamped_at_unity () const = 0;
static void allocate_working_buffers (samplecnt_t framerate);
protected:
static bool _build_missing_peakfiles;
static bool _build_peakfiles;
/* these collections of working buffers for supporting
playlist's reading from potentially nested/recursive
sources assume SINGLE THREADED reads by the butler
thread, or a lock around calls that use them.
*/
static std::vector<boost::shared_array<Sample> > _mixdown_buffers;
static std::vector<boost::shared_array<gain_t> > _gain_buffers;
static Glib::Threads::Mutex _level_buffer_lock;
static void ensure_buffers_for_level (uint32_t, samplecnt_t);
static void ensure_buffers_for_level_locked (uint32_t, samplecnt_t);
samplecnt_t _length;
std::string _peakpath;
std::string _captured_for;
int initialize_peakfile (const std::string& path, const bool in_session = false);
int build_peaks_from_scratch ();
int compute_and_write_peaks (Sample* buf, samplecnt_t first_sample, samplecnt_t cnt,
bool force, bool intermediate_peaks_ready_signal);
void truncate_peakfile();
mutable off_t _peak_byte_max; // modified in compute_and_write_peak()
virtual samplecnt_t read_unlocked (Sample *dst, samplepos_t start, samplecnt_t cnt) const = 0;
virtual samplecnt_t write_unlocked (Sample *dst, samplecnt_t cnt) = 0;
virtual std::string construct_peak_filepath (const std::string& audio_path, const bool in_session = false, const bool old_peak_name = false) const = 0;
virtual int read_peaks_with_fpp (PeakData *peaks,
samplecnt_t npeaks, samplepos_t start, samplecnt_t cnt,
double samples_per_visual_peak, samplecnt_t fpp) const;
int compute_and_write_peaks (Sample* buf, samplecnt_t first_sample, samplecnt_t cnt,
bool force, bool intermediate_peaks_ready_signal,
samplecnt_t samples_per_peak);
private:
bool _peaks_built;
/** This mutex is used to protect both the _peaks_built
* variable and also the emission (and handling) of the
* PeaksReady signal. Holding the lock when emitting
* PeaksReady means that _peaks_built cannot be changed
* during the handling of the signal.
*/
mutable Glib::Threads::Mutex _peaks_ready_lock;
Glib::Threads::Mutex _initialize_peaks_lock;
int _peakfile_fd;
samplecnt_t peak_leftover_cnt;
samplecnt_t peak_leftover_size;
Sample* peak_leftovers;
samplepos_t peak_leftover_sample;
mutable bool _first_run;
mutable double _last_scale;
mutable off_t _last_map_off;
mutable size_t _last_raw_map_length;
mutable boost::scoped_array<PeakData> peak_cache;
};
}
#endif /* __ardour_audio_source_h__ */
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