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
  23 #include <cmath>
  24 #include <string>
  25 #include <queue>
  26 #include <map>
  27 #include <vector>
  28
  29 #include <time.h>
  30
  31 #include <boost/utility.hpp>
  32
  33 #include "pbd/fastlog.h"
  34 #include "pbd/ringbufferNPT.h"
  35 #include "pbd/stateful.h"
  36 #include "pbd/rcu.h"
  37
  38 #include "ardour/ardour.h"
  39 #include "ardour/utils.h"
  40 #include "ardour/diskstream.h"
  41 #include "ardour/audioplaylist.h"
  42 #include "ardour/port.h"
  43 #include "ardour/interpolation.h"
  44
  45 struct tm;
  46
  47 namespace ARDOUR {
  48
  49 class AudioEngine;
  50 class Send;
  51 class Session;
  52 class AudioPlaylist;
  53 class AudioFileSource;
  54 class IO;
  55
  56 class AudioDiskstream : public Diskstream
  57 {
  58   public:
  59         AudioDiskstream (Session &, const std::string& name, Diskstream::Flag f = Recordable);
  60         AudioDiskstream (Session &, const XMLNode&);
  61         ~AudioDiskstream();
  62
  63         float playback_buffer_load() const;
  64         float capture_buffer_load() const;
  65
  66         std::string input_source (uint32_t n=0) const {
  67                 boost::shared_ptr<ChannelList> c = channels.reader();
  68                 if (n < c->size()) {
  69                         return (*c)[n]->source.name;
  70                 } else {
  71                         return "";
  72                 }
  73         }
  74
  75         void set_record_enabled (bool yn);
  76         int set_destructive (bool yn);
  77         int set_non_layered (bool yn);
  78         bool can_become_destructive (bool& requires_bounce) const;
  79
  80         float peak_power(uint32_t n = 0) {
  81                 boost::shared_ptr<ChannelList> c = channels.reader();
  82                 ChannelInfo* chaninfo = (*c)[n];
  83                 float x = chaninfo->peak_power;
  84                 chaninfo->peak_power = 0.0f;
  85                 if (x > 0.0f) {
  86                         return 20.0f * fast_log10(x);
  87                 } else {
  88                         return minus_infinity();
  89                 }
  90         }
  91
  92         boost::shared_ptr<AudioPlaylist> audio_playlist () { return boost::dynamic_pointer_cast<AudioPlaylist>(_playlist); }
  93
  94         int use_playlist (boost::shared_ptr<Playlist>);
  95         int use_new_playlist ();
  96         int use_copy_playlist ();
  97
  98         Sample *playback_buffer (uint32_t n = 0) {
  99                 boost::shared_ptr<ChannelList> c = channels.reader();
 100                 if (n < c->size())
 101                         return (*c)[n]->current_playback_buffer;
 102                 return 0;
 103         }
 104
 105         Sample *capture_buffer (uint32_t n = 0) {
 106                 boost::shared_ptr<ChannelList> c = channels.reader();
 107                 if (n < c->size())
 108                         return (*c)[n]->current_capture_buffer;
 109                 return 0;
 110         }
 111
 112         boost::shared_ptr<AudioFileSource> write_source (uint32_t n=0) {
 113                 boost::shared_ptr<ChannelList> c = channels.reader();
 114                 if (n < c->size())
 115                         return (*c)[n]->write_source;
 116                 return boost::shared_ptr<AudioFileSource>();
 117         }
 118
 119         int add_channel (uint32_t how_many);
 120         int remove_channel (uint32_t how_many);
 121
 122         /* stateful */
 123
 124         XMLNode& get_state(void);
 125         int      set_state(const XMLNode& node, int version);
 126
 127         void monitor_input (bool);
 128
 129         static void swap_by_ptr (Sample *first, Sample *last) {
 130                 while (first < last) {
 131                         Sample tmp = *first;
 132                         *first++ = *last;
 133                         *last-- = tmp;
 134                 }
 135         }
 136
 137         static void swap_by_ptr (Sample *first, Sample *last, framecnt_t n) {
 138                 while (n--) {
 139                         Sample tmp = *first;
 140                         *first++ = *last;
 141                         *last-- = tmp;
 142                 }
 143         }
 144
 145         CubicInterpolation interpolation;
 146
 147   protected:
 148         friend class Session;
 149
 150         /* the Session is the only point of access for these
 151            because they require that the Session is "inactive"
 152            while they are called.
 153         */
 154
 155         void set_pending_overwrite(bool);
 156         int  overwrite_existing_buffers ();
 157         void set_block_size (pframes_t);
 158         int  internal_playback_seek (framecnt_t distance);
 159         int  can_internal_playback_seek (framecnt_t distance);
 160         std::list<boost::shared_ptr<Source> > steal_write_sources();
 161         void reset_write_sources (bool, bool force = false);
 162         void non_realtime_input_change ();
 163         void non_realtime_locate (framepos_t location);
 164
 165   protected:
 166         friend class Auditioner;
 167         int  seek (framepos_t which_sample, bool complete_refill = false);
 168
 169   protected:
 170         friend class AudioTrack;
 171
 172         int  process (framepos_t transport_frame, pframes_t nframes, bool can_record, bool rec_monitors_input, bool& need_butler);
 173         bool commit  (framecnt_t nframes);
 174
 175   private:
 176         struct ChannelSource {
 177             std::string name;
 178
 179             bool is_physical () const;
 180             void ensure_monitor_input (bool) const;
 181         };
 182
 183         struct ChannelInfo : public boost::noncopyable {
 184
 185                 ChannelInfo (framecnt_t playback_buffer_size,
 186                              framecnt_t capture_buffer_size,
 187                              framecnt_t speed_buffer_size,
 188                              framecnt_t wrap_buffer_size);
 189                 ~ChannelInfo ();
 190
 191                 Sample     *playback_wrap_buffer;
 192                 Sample     *capture_wrap_buffer;
 193                 Sample     *speed_buffer;
 194
 195                 float       peak_power;
 196
 197                 boost::shared_ptr<AudioFileSource> fades_source;
 198                 boost::shared_ptr<AudioFileSource> write_source;
 199
 200                 /// information the Port that our audio data comes from
 201
 202                 ChannelSource source;
 203
 204                 Sample       *current_capture_buffer;
 205                 Sample       *current_playback_buffer;
 206
 207                 PBD::RingBufferNPT<Sample> *playback_buf;
 208                 PBD::RingBufferNPT<Sample> *capture_buf;
 209
 210                 Sample* scrub_buffer;
 211                 Sample* scrub_forward_buffer;
 212                 Sample* scrub_reverse_buffer;
 213
 214                 PBD::RingBufferNPT<Sample>::rw_vector playback_vector;
 215                 PBD::RingBufferNPT<Sample>::rw_vector capture_vector;
 216
 217                 PBD::RingBufferNPT<CaptureTransition> * capture_transition_buf;
 218                 // the following are used in the butler thread only
 219                 framecnt_t                     curr_capture_cnt;
 220
 221                 void resize_playback (framecnt_t);
 222                 void resize_capture (framecnt_t);
 223         };
 224
 225         typedef std::vector<ChannelInfo*> ChannelList;
 226
 227         void process_varispeed_playback (pframes_t nframes, boost::shared_ptr<ChannelList> c);
 228
 229         /* The two central butler operations */
 230         int do_flush (RunContext context, bool force = false);
 231         int do_refill () { return _do_refill(_mixdown_buffer, _gain_buffer); }
 232
 233         int do_refill_with_alloc ();
 234
 235         int read (Sample* buf, Sample* mixdown_buffer, float* gain_buffer,
 236                   framepos_t& start, framecnt_t cnt,
 237                   ChannelInfo* channel_info, int channel, bool reversed);
 238
 239         void finish_capture (bool rec_monitors_input, boost::shared_ptr<ChannelList>);
 240         void transport_stopped_wallclock (struct tm&, time_t, bool abort);
 241         void transport_looped (framepos_t transport_frame);
 242
 243         void init ();
 244
 245         void init_channel (ChannelInfo &chan);
 246         void destroy_channel (ChannelInfo &chan);
 247
 248         int use_new_write_source (uint32_t n=0);
 249
 250         int find_and_use_playlist (const std::string &);
 251
 252         void allocate_temporary_buffers ();
 253
 254         int use_pending_capture_data (XMLNode& node);
 255
 256         void get_input_sources ();
 257         void prepare_record_status(framepos_t capture_start_frame);
 258         void set_align_style_from_io();
 259         void setup_destructive_playlist ();
 260         void use_destructive_playlist ();
 261
 262         void adjust_playback_buffering ();
 263         void adjust_capture_buffering ();
 264
 265         void engage_record_enable ();
 266         void disengage_record_enable ();
 267
 268         // Working buffers for do_refill (butler thread)
 269         static void allocate_working_buffers();
 270         static void free_working_buffers();
 271
 272         static size_t  _working_buffers_size;
 273         static Sample* _mixdown_buffer;
 274         static gain_t* _gain_buffer;
 275
 276         std::vector<boost::shared_ptr<AudioFileSource> > capturing_sources;
 277
 278         SerializedRCUManager<ChannelList> channels;
 279
 280  /* really */
 281   private:
 282         int _do_refill (Sample *mixdown_buffer, float *gain_buffer);
 283
 284         int add_channel_to (boost::shared_ptr<ChannelList>, uint32_t how_many);
 285         int remove_channel_from (boost::shared_ptr<ChannelList>, uint32_t how_many);
 286
 287 };
 288
 289 } // namespace ARDOUR
 290
 291 #endif /* __ardour_audio_diskstream_h__ */