RCU-ification of AudioEngine port list, and DiskStreams. not well tested, but basical...
[ardour.git] / libs / ardour / ardour / audio_diskstream.h
1 /*
2     Copyright (C) 2000-2006 Paul Davis 
3
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.
8
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.
13
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.
17 */
18
19 #ifndef __ardour_audio_diskstream_h__
20 #define __ardour_audio_diskstream_h__
21
22 #include <sigc++/signal.h>
23
24 #include <cmath>
25 #include <string>
26 #include <queue>
27 #include <map>
28 #include <vector>
29
30 #include <time.h>
31
32 #include <pbd/fastlog.h>
33 #include <pbd/ringbufferNPT.h>
34 #include <pbd/stateful.h> 
35
36 #include <ardour/ardour.h>
37 #include <ardour/configuration.h>
38 #include <ardour/session.h>
39 #include <ardour/route_group.h>
40 #include <ardour/route.h>
41 #include <ardour/port.h>
42 #include <ardour/utils.h>
43 #include <ardour/diskstream.h>
44 #include <ardour/audioplaylist.h>
45
46 struct tm;
47
48 namespace ARDOUR {
49
50 class AudioEngine;
51 class Send;
52 class Session;
53 class AudioPlaylist;
54 class AudioFileSource;
55 class IO;
56
57 class AudioDiskstream : public Diskstream
58 {       
59   public:
60         AudioDiskstream (Session &, const string& name, Diskstream::Flag f = Recordable);
61         AudioDiskstream (Session &, const XMLNode&);
62         ~AudioDiskstream();
63
64         const PBD::ID& id() const { return _id; }
65
66         float playback_buffer_load() const;
67         float capture_buffer_load() const;
68
69         string input_source (uint32_t n=0) const {
70                 if (n < channels.size()) {
71                         return channels[n].source ? channels[n].source->name() : "";
72                 } else {
73                         return ""; 
74                 }
75         }
76
77         Port *input_source_port (uint32_t n=0) const { 
78                 if (n < channels.size()) return channels[n].source; return 0; 
79         }
80
81         void set_record_enabled (bool yn);
82
83         float peak_power(uint32_t n=0) { 
84                 float x = channels[n].peak_power;
85                 channels[n].peak_power = 0.0f;
86                 if (x > 0.0f) {
87                         return 20.0f * fast_log10(x);
88                 } else {
89                         return minus_infinity();
90                 }
91         }
92         
93         AudioPlaylist* audio_playlist () { return dynamic_cast<AudioPlaylist*>(_playlist); }
94
95         int use_playlist (Playlist *);
96         int use_new_playlist ();
97         int use_copy_playlist ();
98
99         Sample *playback_buffer (uint32_t n=0) {
100                 if (n < channels.size())
101                         return channels[n].current_playback_buffer;
102                 return 0;
103         }
104         
105         Sample *capture_buffer (uint32_t n=0) {
106                 if (n < channels.size())
107                         return channels[n].current_capture_buffer;
108                 return 0;
109         }
110
111         AudioFileSource *write_source (uint32_t n=0) {
112                 if (n < channels.size())
113                         return channels[n].write_source;
114                 return 0;
115         }
116
117         int add_channel ();
118         int remove_channel ();
119         
120         
121         /* stateful */
122
123         XMLNode& get_state(void);
124         int      set_state(const XMLNode& node);
125
126         void monitor_input (bool);
127
128         static void swap_by_ptr (Sample *first, Sample *last) {
129                 while (first < last) {
130                         Sample tmp = *first;
131                         *first++ = *last;
132                         *last-- = tmp;
133                 }
134         }
135
136         static void swap_by_ptr (Sample *first, Sample *last, jack_nframes_t n) {
137                 while (n--) {
138                         Sample tmp = *first;
139                         *first++ = *last;
140                         *last-- = tmp;
141                 }
142         }
143
144         std::list<Region*>& last_capture_regions () { return _last_capture_regions; }
145
146         XMLNode* deprecated_io_node;
147
148   protected:
149         friend class Session;
150
151         /* the Session is the only point of access for these
152            because they require that the Session is "inactive"
153            while they are called.
154         */
155
156         void set_pending_overwrite(bool);
157         int  overwrite_existing_buffers ();
158         void set_block_size (jack_nframes_t);
159         int  internal_playback_seek (jack_nframes_t distance);
160         int  can_internal_playback_seek (jack_nframes_t distance);
161         int  rename_write_sources ();
162         void reset_write_sources (bool, bool force = false);
163         void non_realtime_input_change ();
164
165   protected:
166         friend class Auditioner;
167         int  seek (jack_nframes_t which_sample, bool complete_refill = false);
168
169   protected:
170         friend class AudioTrack;
171
172         int  process (jack_nframes_t transport_frame, jack_nframes_t nframes, jack_nframes_t offset, bool can_record, bool rec_monitors_input);
173         bool commit  (jack_nframes_t nframes);
174
175   private:
176
177         struct ChannelInfo {
178
179                 Sample     *playback_wrap_buffer;
180                 Sample     *capture_wrap_buffer;
181                 Sample     *speed_buffer;
182
183                 float       peak_power;
184
185                 AudioFileSource   *fades_source;
186                 AudioFileSource   *write_source;
187
188                 Port         *source;
189                 Sample       *current_capture_buffer;
190                 Sample       *current_playback_buffer;
191
192                 RingBufferNPT<Sample> *playback_buf;
193                 RingBufferNPT<Sample> *capture_buf;
194
195                 Sample* scrub_buffer;
196                 Sample* scrub_forward_buffer;
197                 Sample* scrub_reverse_buffer;
198
199                 RingBufferNPT<Sample>::rw_vector playback_vector;
200                 RingBufferNPT<Sample>::rw_vector capture_vector;
201
202                 RingBufferNPT<CaptureTransition> * capture_transition_buf;
203                 // the following are used in the butler thread only
204                 jack_nframes_t                     curr_capture_cnt;
205         };
206
207         /* The two central butler operations */
208         int do_flush (Session::RunContext context, bool force = false);
209         int do_refill () { return _do_refill(_mixdown_buffer, _gain_buffer); }
210         
211         int do_refill_with_alloc();
212
213         int read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer,
214                 jack_nframes_t& start, jack_nframes_t cnt, 
215                 ChannelInfo& channel_info, int channel, bool reversed);
216
217         void finish_capture (bool rec_monitors_input);
218         void transport_stopped (struct tm&, time_t, bool abort);
219
220         void init (Diskstream::Flag);
221
222         void init_channel (ChannelInfo &chan);
223         void destroy_channel (ChannelInfo &chan);
224         
225         int use_new_write_source (uint32_t n=0);
226
227         int find_and_use_playlist (const string&);
228
229         void allocate_temporary_buffers ();
230
231         int use_pending_capture_data (XMLNode& node);
232
233         void get_input_sources ();
234         void check_record_status (jack_nframes_t transport_frame, jack_nframes_t nframes, bool can_record);
235         void set_align_style_from_io();
236         void setup_destructive_playlist ();
237         void use_destructive_playlist ();
238
239         void engage_record_enable ();
240         void disengage_record_enable ();
241
242         // Working buffers for do_refill (butler thread)
243         static void allocate_working_buffers();
244         static void free_working_buffers();
245
246         static size_t  _working_buffers_size;
247         static Sample* _mixdown_buffer;
248         static gain_t* _gain_buffer;
249
250         // Uh, /really/ private? (there should probably be less friends of Diskstream)
251         int _do_refill (Sample *mixdown_buffer, float *gain_buffer);
252         
253         
254         std::vector<AudioFileSource*> capturing_sources;
255         
256         typedef vector<ChannelInfo> ChannelList;
257         ChannelList channels;
258 };
259
260 } // namespace ARDOUR
261
262 #endif /* __ardour_audio_diskstream_h__ */