2 Copyright (C) 2009-2016 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_disk_io_h__
21 #define __ardour_disk_io_h__
27 #include "pbd/ringbufferNPT.h"
30 #include "ardour/interpolation.h"
31 #include "ardour/processor.h"
35 class AudioFileSource;
44 template<typename T> class MidiRingBuffer;
46 class LIBARDOUR_API DiskIOProcessor : public Processor
53 NonLayered = 0x8 // deprecated (kept only for enum compat)
56 static const std::string state_node_name;
58 DiskIOProcessor (Session&, const std::string& name, Flag f);
59 virtual ~DiskIOProcessor ();
61 void set_route (boost::shared_ptr<Route>);
64 static void set_buffering_parameters (BufferingPreset bp);
66 int set_block_size (pframes_t);
67 bool configure_io (ChanCount in, ChanCount out);
68 bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
70 /** @return A number between 0 and 1, where 0 indicates that the playback/capture buffer
71 * is dry (ie the disk subsystem could not keep up) and 1 indicates that the
74 virtual float buffer_load() const = 0;
76 void set_flag (Flag f) { _flags = Flag (_flags | f); }
77 void unset_flag (Flag f) { _flags = Flag (_flags & ~f); }
79 bool hidden() const { return _flags & Hidden; }
80 bool recordable() const { return _flags & Recordable; }
82 virtual void non_realtime_locate (samplepos_t);
84 virtual void punch_in() {}
85 virtual void punch_out() {}
87 bool slaved() const { return _slaved; }
88 void set_slaved(bool yn) { _slaved = yn; }
90 PBD::Signal0<void> SpeedChanged;
91 PBD::Signal0<void> ReverseChanged;
93 int set_state (const XMLNode&, int version);
95 int add_channel (uint32_t how_many);
96 int remove_channel (uint32_t how_many);
98 bool need_butler() const { return _need_butler; }
100 boost::shared_ptr<Playlist> get_playlist (DataType dt) const { return _playlists[dt]; }
101 boost::shared_ptr<MidiPlaylist> midi_playlist() const;
102 boost::shared_ptr<AudioPlaylist> audio_playlist() const;
104 virtual void playlist_modified () {}
105 virtual int use_playlist (DataType, boost::shared_ptr<Playlist>);
107 virtual void adjust_buffering() = 0;
110 friend class Auditioner;
111 virtual int seek (samplepos_t which_sample, bool complete_refill = false) = 0;
115 uint32_t i_am_the_modifier;
116 double _actual_speed;
117 double _target_speed;
120 samplepos_t playback_sample;
122 boost::shared_ptr<Route> _route;
126 Glib::Threads::Mutex state_lock;
128 static bool get_buffering_presets (BufferingPreset bp,
129 samplecnt_t& read_chunk_size,
130 samplecnt_t& read_buffer_size,
131 samplecnt_t& write_chunk_size,
132 samplecnt_t& write_buffer_size);
134 enum TransitionType {
139 struct CaptureTransition {
141 samplepos_t capture_val; ///< The start or end file sample position
144 /** Information about one audio channel, playback or capture
145 * (depending on the derived class)
147 struct ChannelInfo : public boost::noncopyable {
149 ChannelInfo (samplecnt_t buffer_size);
150 virtual ~ChannelInfo ();
152 /** Ringbuffer for data to be played back.
153 * written to in the butler thread, read from in the process thread.
155 PBD::RingBufferNPT<Sample>* rbuf;
157 /** A ringbuffer for data to be recorded back, written to in the
158 * process thread, read from in the butler thread.
160 PBD::RingBufferNPT<Sample>* wbuf;
161 PBD::RingBufferNPT<Sample>::rw_vector rw_vector;
163 /* used only by capture */
164 boost::shared_ptr<AudioFileSource> write_source;
165 PBD::RingBufferNPT<CaptureTransition>* capture_transition_buf;
167 /* used in the butler thread only */
168 samplecnt_t curr_capture_cnt;
170 virtual void resize (samplecnt_t) = 0;
173 typedef std::vector<ChannelInfo*> ChannelList;
174 SerializedRCUManager<ChannelList> channels;
176 virtual int add_channel_to (boost::shared_ptr<ChannelList>, uint32_t how_many) = 0;
177 int remove_channel_from (boost::shared_ptr<ChannelList>, uint32_t how_many);
179 boost::shared_ptr<Playlist> _playlists[DataType::num_types];
180 PBD::ScopedConnectionList playlist_connections;
182 virtual void playlist_changed (const PBD::PropertyChange&) {}
183 virtual void playlist_deleted (boost::weak_ptr<Playlist>);
184 virtual void playlist_ranges_moved (std::list< Evoral::RangeMove<samplepos_t> > const &, bool) {}
188 MidiRingBuffer<samplepos_t>* _midi_buf;
189 gint _samples_written_to_ringbuffer;
190 gint _samples_read_from_ringbuffer;
192 static void get_location_times (const Location* location, samplepos_t* start, samplepos_t* end, samplepos_t* length);
195 } // namespace ARDOUR
197 #endif /* __ardour_disk_io_h__ */