2 Copyright (C) 2000 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_audio_source_h__
21 #define __ardour_audio_source_h__
26 #include <boost/shared_ptr.hpp>
27 #include <boost/enable_shared_from_this.hpp>
31 #include <glibmm/thread.h>
32 #include <glibmm/ustring.h>
34 #include <sigc++/signal.h>
36 #include <ardour/source.h>
37 #include <ardour/ardour.h>
38 #include <pbd/stateful.h>
39 #include <pbd/xml++.h>
47 const nframes_t frames_per_peak = 256;
49 class AudioSource : public Source, public boost::enable_shared_from_this<ARDOUR::AudioSource>
52 AudioSource (Session&, ustring name);
53 AudioSource (Session&, const XMLNode&);
54 virtual ~AudioSource ();
56 virtual nframes_t available_peaks (double zoom) const;
58 virtual nframes_t read (Sample *dst, nframes_t start, nframes_t cnt) const;
59 virtual nframes_t write (Sample *src, nframes_t cnt);
61 virtual float sample_rate () const = 0;
63 virtual void mark_for_remove() = 0;
64 virtual void mark_streaming_write_completed () {}
66 virtual bool can_truncate_peaks() const { return true; }
68 void set_captured_for (ustring str) { _captured_for = str; }
69 ustring captured_for() const { return _captured_for; }
71 uint32_t read_data_count() const { return _read_data_count; }
72 uint32_t write_data_count() const { return _write_data_count; }
74 virtual int read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_unit) const;
76 bool peaks_ready (sigc::slot<void>, sigc::connection&) const;
78 mutable sigc::signal<void> PeaksReady;
79 mutable sigc::signal<void,nframes_t,nframes_t> PeakRangeReady;
81 XMLNode& get_state ();
82 int set_state (const XMLNode&);
84 int rename_peakfile (ustring newpath);
85 void touch_peakfile ();
87 static void set_build_missing_peakfiles (bool yn) {
88 _build_missing_peakfiles = yn;
91 static void set_build_peakfiles (bool yn) {
92 _build_peakfiles = yn;
95 virtual int setup_peakfile () { return 0; }
97 int prepare_for_peakfile_writes ();
98 void done_with_peakfile_writes ();
101 static bool _build_missing_peakfiles;
102 static bool _build_peakfiles;
105 mutable Glib::Mutex _lock;
107 ustring _captured_for;
109 mutable uint32_t _read_data_count; // modified in read()
110 mutable uint32_t _write_data_count; // modified in write()
112 int initialize_peakfile (bool newfile, ustring path);
113 int build_peaks_from_scratch ();
114 int compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force);
115 void truncate_peakfile();
117 mutable off_t _peak_byte_max; // modified in compute_and_write_peak()
119 virtual nframes_t read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const = 0;
120 virtual nframes_t write_unlocked (Sample *dst, nframes_t cnt) = 0;
121 virtual ustring peak_path(ustring audio_path) = 0;
122 virtual ustring old_peak_path(ustring audio_path) = 0;
126 nframes_t peak_leftover_cnt;
127 nframes_t peak_leftover_size;
128 Sample* peak_leftovers;
129 nframes_t peak_leftover_frame;
131 bool file_changed (ustring path);
136 #endif /* __ardour_audio_source_h__ */