2 * Copyright (C) 2016-2018 Paul Davis <paul@linuxaudiosystems.com>
3 * Copyright (C) 2017-2019 Robin Gareus <robin@gareus.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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"
34 template<class T> class PlaybackBuffer;
39 class AudioFileSource;
48 template<typename T> class MidiRingBuffer;
50 class LIBARDOUR_API DiskIOProcessor : public Processor
57 NonLayered = 0x8 // deprecated (kept only for enum compat)
60 static const std::string state_node_name;
62 DiskIOProcessor (Session&, const std::string& name, Flag f);
63 virtual ~DiskIOProcessor ();
65 void set_route (boost::shared_ptr<Route>);
68 static void set_buffering_parameters (BufferingPreset bp);
70 int set_block_size (pframes_t);
71 bool configure_io (ChanCount in, ChanCount out);
72 bool can_support_io_configuration (const ChanCount& in, ChanCount& out);
74 /** @return A number between 0 and 1, where 0 indicates that the playback/capture buffer
75 * is dry (ie the disk subsystem could not keep up) and 1 indicates that the
78 virtual float buffer_load() const = 0;
80 void set_flag (Flag f) { _flags = Flag (_flags | f); }
81 void unset_flag (Flag f) { _flags = Flag (_flags & ~f); }
83 bool hidden() const { return _flags & Hidden; }
84 bool recordable() const { return _flags & Recordable; }
86 virtual void non_realtime_locate (samplepos_t);
88 virtual void punch_in() {}
89 virtual void punch_out() {}
91 bool slaved() const { return _slaved; }
92 void set_slaved(bool yn) { _slaved = yn; }
94 PBD::Signal0<void> SpeedChanged;
95 PBD::Signal0<void> ReverseChanged;
97 int set_state (const XMLNode&, int version);
99 int add_channel (uint32_t how_many);
100 int remove_channel (uint32_t how_many);
102 bool need_butler() const { return _need_butler; }
104 boost::shared_ptr<Playlist> get_playlist (DataType dt) const { return _playlists[dt]; }
105 boost::shared_ptr<MidiPlaylist> midi_playlist() const;
106 boost::shared_ptr<AudioPlaylist> audio_playlist() const;
108 virtual void playlist_modified () {}
109 virtual int use_playlist (DataType, boost::shared_ptr<Playlist>);
111 virtual void adjust_buffering() = 0;
114 friend class Auditioner;
115 virtual int seek (samplepos_t which_sample, bool complete_refill = false) = 0;
119 uint32_t i_am_the_modifier;
122 samplepos_t playback_sample;
124 boost::shared_ptr<Route> _route;
128 Glib::Threads::Mutex state_lock;
130 static bool get_buffering_presets (BufferingPreset bp,
131 samplecnt_t& read_chunk_size,
132 samplecnt_t& read_buffer_size,
133 samplecnt_t& write_chunk_size,
134 samplecnt_t& write_buffer_size);
136 enum TransitionType {
141 struct CaptureTransition {
143 samplepos_t capture_val; ///< The start or end file sample position
146 /** Information about one audio channel, playback or capture
147 * (depending on the derived class)
149 struct ChannelInfo : public boost::noncopyable {
151 ChannelInfo (samplecnt_t buffer_size);
152 virtual ~ChannelInfo ();
154 /** A random-access ringbuffer for data to be played back.
155 * written to in the butler thread, read from in the process thread.
157 PBD::PlaybackBuffer<Sample>* rbuf;
159 /** A ringbuffer for data to be recorded back, written to in the
160 * process thread, read from in the butler thread.
162 PBD::RingBufferNPT<Sample>* wbuf;
163 PBD::RingBufferNPT<Sample>::rw_vector rw_vector;
165 /* used only by capture */
166 boost::shared_ptr<AudioFileSource> write_source;
167 PBD::RingBufferNPT<CaptureTransition>* capture_transition_buf;
169 /* used in the butler thread only */
170 samplecnt_t curr_capture_cnt;
172 virtual void resize (samplecnt_t) = 0;
175 typedef std::vector<ChannelInfo*> ChannelList;
176 SerializedRCUManager<ChannelList> channels;
178 virtual int add_channel_to (boost::shared_ptr<ChannelList>, uint32_t how_many) = 0;
179 int remove_channel_from (boost::shared_ptr<ChannelList>, uint32_t how_many);
181 boost::shared_ptr<Playlist> _playlists[DataType::num_types];
182 PBD::ScopedConnectionList playlist_connections;
184 virtual void playlist_changed (const PBD::PropertyChange&) {}
185 virtual void playlist_deleted (boost::weak_ptr<Playlist>);
186 virtual void playlist_ranges_moved (std::list< Evoral::RangeMove<samplepos_t> > const &, bool) {}
190 MidiRingBuffer<samplepos_t>* _midi_buf;
191 gint _samples_written_to_ringbuffer;
192 gint _samples_read_from_ringbuffer;
194 static void get_location_times (const Location* location, samplepos_t* start, samplepos_t* end, samplepos_t* length);
197 } // namespace ARDOUR
199 #endif /* __ardour_disk_io_h__ */