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__
27 #include <boost/shared_ptr.hpp>
28 #include <boost/enable_shared_from_this.hpp>
32 #include <glibmm/thread.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&, string name);
53 AudioSource (Session&, const XMLNode&);
54 virtual ~AudioSource ();
56 /* one could argue that this should belong to Source, but other data types
57 generally do not come with a model of "offset along an audio timeline"
58 so its here in AudioSource for now.
61 virtual nframes_t natural_position() const { return 0; }
63 /* returns the number of items in this `audio_source' */
65 virtual nframes_t length() const {
69 virtual nframes_t available_peaks (double zoom) const;
71 virtual nframes_t read (Sample *dst, nframes_t start, nframes_t cnt) const;
72 virtual nframes_t write (Sample *src, nframes_t cnt);
74 virtual float sample_rate () const = 0;
76 virtual void mark_for_remove() = 0;
77 virtual void mark_streaming_write_completed () {}
79 virtual bool can_truncate_peaks() const { return true; }
81 void set_captured_for (string str) { _captured_for = str; }
82 string captured_for() const { return _captured_for; }
84 uint32_t read_data_count() const { return _read_data_count; }
85 uint32_t write_data_count() const { return _write_data_count; }
87 virtual int read_peaks (PeakData *peaks, nframes_t npeaks, nframes_t start, nframes_t cnt, double samples_per_unit) const;
89 bool peaks_ready (sigc::slot<void>, sigc::connection&) const;
91 mutable sigc::signal<void> PeaksReady;
92 mutable sigc::signal<void,nframes_t,nframes_t> PeakRangeReady;
94 XMLNode& get_state ();
95 int set_state (const XMLNode&);
97 int rename_peakfile (std::string newpath);
98 void touch_peakfile ();
100 static void set_build_missing_peakfiles (bool yn) {
101 _build_missing_peakfiles = yn;
104 static void set_build_peakfiles (bool yn) {
105 _build_peakfiles = yn;
108 virtual int setup_peakfile () { return 0; }
110 int prepare_for_peakfile_writes ();
111 void done_with_peakfile_writes ();
114 static bool _build_missing_peakfiles;
115 static bool _build_peakfiles;
118 mutable Glib::Mutex _lock;
121 string _captured_for;
123 mutable uint32_t _read_data_count; // modified in read()
124 mutable uint32_t _write_data_count; // modified in write()
126 int initialize_peakfile (bool newfile, string path);
127 int build_peaks_from_scratch ();
128 int compute_and_write_peaks (Sample* buf, nframes_t first_frame, nframes_t cnt, bool force);
129 void truncate_peakfile();
131 mutable off_t _peak_byte_max; // modified in compute_and_write_peak()
133 virtual nframes_t read_unlocked (Sample *dst, nframes_t start, nframes_t cnt) const = 0;
134 virtual nframes_t write_unlocked (Sample *dst, nframes_t cnt) = 0;
135 virtual string peak_path(string audio_path) = 0;
136 virtual string old_peak_path(string audio_path) = 0;
138 void update_length (nframes_t pos, nframes_t cnt);
142 nframes_t peak_leftover_cnt;
143 nframes_t peak_leftover_size;
144 Sample* peak_leftovers;
145 nframes_t peak_leftover_frame;
147 bool file_changed (string path);
152 #endif /* __ardour_audio_source_h__ */