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.
18 $Id: audio_source.h 486 2006-04-27 09:04:24Z pauld $
21 #ifndef __ardour_audio_source_h__
22 #define __ardour_audio_source_h__
30 #include <glibmm/thread.h>
32 #include <sigc++/signal.h>
34 #include <ardour/source.h>
35 #include <ardour/ardour.h>
36 #include <ardour/stateful.h>
37 #include <pbd/xml++.h>
45 const jack_nframes_t frames_per_peak = 256;
47 class AudioSource : public Source
50 AudioSource (string name);
51 AudioSource (const XMLNode&);
52 virtual ~AudioSource ();
54 /* returns the number of items in this `audio_source' */
56 virtual jack_nframes_t length() const {
60 virtual jack_nframes_t available_peaks (double zoom) const;
62 virtual jack_nframes_t read (Sample *dst, jack_nframes_t start, jack_nframes_t cnt, char * workbuf) const;
63 virtual jack_nframes_t write (Sample *src, jack_nframes_t cnt, char * workbuf);
65 virtual float sample_rate () const = 0;
67 virtual void mark_for_remove() = 0;
68 virtual void mark_streaming_write_completed () {}
70 void set_captured_for (string str) { _captured_for = str; }
71 string captured_for() const { return _captured_for; }
73 uint32_t read_data_count() const { return _read_data_count; }
74 uint32_t write_data_count() const { return _write_data_count; }
76 int read_peaks (PeakData *peaks, jack_nframes_t npeaks, jack_nframes_t start, jack_nframes_t cnt, double samples_per_unit) const;
78 bool peaks_ready (sigc::slot<void>, sigc::connection&) const;
80 static sigc::signal<void,AudioSource*> AudioSourceCreated;
82 mutable sigc::signal<void> PeaksReady;
83 mutable sigc::signal<void,jack_nframes_t,jack_nframes_t> PeakRangeReady;
85 XMLNode& get_state ();
86 int set_state (const XMLNode&);
88 static int start_peak_thread ();
89 static void stop_peak_thread ();
91 int rename_peakfile (std::string newpath);
93 static void set_build_missing_peakfiles (bool yn) {
94 _build_missing_peakfiles = yn;
97 static void set_build_peakfiles (bool yn) {
98 _build_peakfiles = yn;
102 static bool _build_missing_peakfiles;
103 static bool _build_peakfiles;
106 mutable Glib::Mutex _lock;
107 jack_nframes_t _length;
108 bool next_peak_clear_should_notify;
110 string _captured_for;
112 mutable uint32_t _read_data_count; // modified in read()
113 mutable uint32_t _write_data_count; // modified in write()
115 int initialize_peakfile (bool newfile, string path);
116 void build_peaks_from_scratch ();
118 int do_build_peak (jack_nframes_t, jack_nframes_t);
120 virtual jack_nframes_t read_unlocked (Sample *dst, jack_nframes_t start, jack_nframes_t cnt, char * workbuf) const = 0;
121 virtual jack_nframes_t write_unlocked (Sample *dst, jack_nframes_t cnt, char * workbuf) = 0;
122 virtual string peak_path(string audio_path) = 0;
123 virtual string old_peak_path(string audio_path) = 0;
125 void update_length (jack_nframes_t pos, jack_nframes_t cnt);
127 static pthread_t peak_thread;
128 static bool have_peak_thread;
129 static void* peak_thread_work(void*);
131 static int peak_request_pipe[2];
140 static vector<AudioSource*> pending_peak_sources;
141 static Glib::Mutex* pending_peak_sources_lock;
143 static void queue_for_peaks (AudioSource&);
144 static void clear_queue_for_peaks ();
146 struct PeakBuildRecord {
147 jack_nframes_t frame;
150 PeakBuildRecord (jack_nframes_t f, jack_nframes_t c)
151 : frame (f), cnt (c) {}
152 PeakBuildRecord (const PeakBuildRecord& other) {
158 list<AudioSource::PeakBuildRecord *> pending_peak_builds;
161 bool file_changed (string path);
166 #endif /* __ardour_audio_source_h__ */