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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.
$Id: audio_source.h 486 2006-04-27 09:04:24Z pauld $
*/
#ifndef __ardour_audio_source_h__
#define __ardour_audio_source_h__
#include <list>
#include <vector>
#include <string>
#include <boost/shared_ptr.hpp>
#include <boost/enable_shared_from_this.hpp>
#include <time.h>
#include <glibmm/thread.h>
#include <sigc++/signal.h>
#include <ardour/source.h>
#include <ardour/ardour.h>
#include <pbd/stateful.h>
#include <pbd/xml++.h>
using std::list;
using std::vector;
using std::string;
namespace ARDOUR {
const nframes_t frames_per_peak = 256;
class AudioSource : public Source, public boost::enable_shared_from_this<ARDOUR::AudioSource>
{
public:
AudioSource (Session&, string name);
AudioSource (Session&, const XMLNode&);
virtual ~AudioSource ();
virtual nframes_t available_peaks (double zoom) const;
virtual nframes_t read (Sample *dst, nframes_t start, nframes_t cnt) const;
virtual nframes_t write (Sample *src, nframes_t cnt);
virtual float sample_rate () const = 0;
virtual void mark_for_remove() = 0;
virtual void mark_streaming_write_completed () {}
void set_captured_for (string str) { _captured_for = str; }
string captured_for() const { return _captured_for; }
uint32_t read_data_count() const { return _read_data_count; }
uint32_t write_data_count() const { return _write_data_count; }
int read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_unit) const;
int build_peaks ();
bool peaks_ready (sigc::slot<void>, sigc::connection&) const;
mutable sigc::signal<void> PeaksReady;
mutable sigc::signal<void,nframes_t,nframes_t> PeakRangeReady;
XMLNode& get_state ();
int set_state (const XMLNode&);
static int start_peak_thread ();
static void stop_peak_thread ();
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;
}
virtual int setup_peakfile () { return 0; }
protected:
static bool _build_missing_peakfiles;
static bool _build_peakfiles;
bool _peaks_built;
mutable Glib::Mutex _lock;
bool next_peak_clear_should_notify;
string peakpath;
string _captured_for;
mutable uint32_t _read_data_count; // modified in read()
mutable uint32_t _write_data_count; // modified in write()
int initialize_peakfile (bool newfile, string path);
void build_peaks_from_scratch ();
int do_build_peak (nframes_t, nframes_t);
virtual nframes_t read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const = 0;
virtual nframes_t write_unlocked (Sample *dst, nframes_t cnt) = 0;
virtual string peak_path(string audio_path) = 0;
virtual string old_peak_path(string audio_path) = 0;
static pthread_t peak_thread;
static bool have_peak_thread;
static void* peak_thread_work(void*);
static int peak_request_pipe[2];
struct PeakRequest {
enum Type {
Build,
Quit
};
};
static vector<boost::shared_ptr<AudioSource> > pending_peak_sources;
static Glib::Mutex* pending_peak_sources_lock;
static void queue_for_peaks (boost::shared_ptr<AudioSource>);
static void clear_queue_for_peaks ();
struct PeakBuildRecord {
nframes_t frame;
nframes_t cnt;
PeakBuildRecord (nframes_t f, nframes_t c)
: frame (f), cnt (c) {}
PeakBuildRecord (const PeakBuildRecord& other) {
frame = other.frame;
cnt = other.cnt;
}
};
list<AudioSource::PeakBuildRecord *> pending_peak_builds;
private:
bool file_changed (string path);
};
}
#endif /* __ardour_audio_source_h__ */
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