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