libs/ardour/session_click.cc

   1 /*
   2     Copyright (C) 2002 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
  20 #include <list>
  21 #include <cerrno>
  22
  23 #include "ardour/ardour.h"
  24 #include "ardour/session.h"
  25 #include "ardour/tempo.h"
  26 #include "ardour/io.h"
  27 #include "ardour/buffer_set.h"
  28 #include "ardour/audio_buffer.h"
  29
  30 #include <sndfile.h>
  31
  32 #include "i18n.h"
  33
  34 using namespace std;
  35 using namespace ARDOUR;
  36 using namespace PBD;
  37
  38 Pool Click::pool ("click", sizeof (Click), 128);
  39
  40 void
  41 Session::click (nframes_t start, nframes_t nframes)
  42 {
  43         TempoMap::BBTPointList *points;
  44         Sample *buf;
  45
  46         if (_click_io == 0) {
  47                 return;
  48         }
  49
  50         Glib::RWLock::WriterLock clickm (click_lock, Glib::TRY_LOCK);
  51
  52         if (!clickm.locked() || _transport_speed != 1.0 || !_clicking || click_data == 0) {
  53                 _click_io->silence (nframes);
  54                 return;
  55         }
  56
  57         const nframes_t end = start + nframes;
  58
  59         BufferSet& bufs = get_scratch_buffers(ChanCount(DataType::AUDIO, 1));
  60         buf = bufs.get_audio(0).data();
  61         points = _tempo_map->get_points (start, end);
  62
  63         if (points == 0) {
  64                 goto run_clicks;
  65         }
  66
  67         if (points->empty()) {
  68                 delete points;
  69                 goto run_clicks;
  70         }
  71
  72         for (TempoMap::BBTPointList::iterator i = points->begin(); i != points->end(); ++i) {
  73                 switch ((*i).type) {
  74                 case TempoMap::Beat:
  75                         if (click_emphasis_data == 0 || (click_emphasis_data && (*i).beat != 1)) {
  76                                 clicks.push_back (new Click ((*i).frame, click_length, click_data));
  77                         }
  78                         break;
  79
  80                 case TempoMap::Bar:
  81                         if (click_emphasis_data) {
  82                                 clicks.push_back (new Click ((*i).frame, click_emphasis_length, click_emphasis_data));
  83                         }
  84                         break;
  85                 }
  86         }
  87
  88   run_clicks:
  89         memset (buf, 0, sizeof (Sample) * nframes);
  90
  91         for (list<Click*>::iterator i = clicks.begin(); i != clicks.end(); ) {
  92
  93                 nframes_t copy;
  94                 nframes_t internal_offset;
  95                 Click *clk;
  96                 list<Click*>::iterator next;
  97
  98                 clk = *i;
  99                 next = i;
 100                 ++next;
 101
 102                 if (clk->start < start) {
 103                         internal_offset = 0;
 104                 } else {
 105                         internal_offset = clk->start - start;
 106                 }
 107
 108                 if (nframes < internal_offset) {
 109                          /* we've just located or something..
 110                             effectively going backwards.
 111                             lets get the flock out of here */
 112                         break;
 113                 }
 114
 115                 copy = min (clk->duration - clk->offset, nframes - internal_offset);
 116
 117                 memcpy (buf + internal_offset, &clk->data[clk->offset], copy * sizeof (Sample));
 118
 119                 clk->offset += copy;
 120
 121                 if (clk->offset >= clk->duration) {
 122                         delete clk;
 123                         clicks.erase (i);
 124                 }
 125
 126
 127                 i = next;
 128         }
 129
 130         _click_io->copy_to_outputs (bufs, DataType::AUDIO, nframes, 0);
 131 }
 132
 133 void
 134 Session::setup_click_sounds (int which)
 135 {
 136         SNDFILE *sndfile;
 137         SF_INFO info;
 138
 139         clear_clicks();
 140
 141         if ((which == 0 || which == 1)) {
 142
 143                 if (click_data != default_click) {
 144                         delete [] click_data;
 145                         click_data = 0;
 146                 }
 147
 148                 string path = Config->get_click_sound();
 149
 150                 if (path.empty()) {
 151
 152                         click_data = const_cast<Sample*> (default_click);
 153                         click_length = default_click_length;
 154
 155                 } else {
 156
 157                         info.format = 0;
 158                         if ((sndfile = sf_open (path.c_str(), SFM_READ, &info)) == 0) {
 159                                 char errbuf[256];
 160                                 sf_error_str (0, errbuf, sizeof (errbuf) - 1);
 161                                 warning << string_compose (_("cannot open click soundfile %1 (%2)"), path, errbuf) << endmsg;
 162                                 _clicking = false;
 163                                 return;
 164                         }
 165
 166                         click_data = new Sample[info.frames];
 167                         click_length = info.frames;
 168
 169                         if (sf_read_float (sndfile, click_data, info.frames) != info.frames) {
 170                                 warning << _("cannot read data from click soundfile") << endmsg;
 171                                 delete click_data;
 172                                 click_data = 0;
 173                                 _clicking = false;
 174                         }
 175
 176                         sf_close (sndfile);
 177
 178                 }
 179         }
 180
 181         if ((which == 0 || which == -1)) {
 182
 183                 if (click_emphasis_data != default_click_emphasis) {
 184                         delete [] click_emphasis_data;
 185                         click_emphasis_data = 0;
 186                 }
 187
 188                 string path = Config->get_click_emphasis_sound();
 189
 190                 if (path.empty()) {
 191                         click_emphasis_data = const_cast<Sample*> (default_click_emphasis);
 192                         click_emphasis_length = default_click_emphasis_length;
 193                 } else {
 194                         info.format = 0;
 195                         if ((sndfile = sf_open (path.c_str(), SFM_READ, &info)) == 0) {
 196                                 char errbuf[256];
 197                                 sf_error_str (0, errbuf, sizeof (errbuf) - 1);
 198                                 warning << string_compose (_("cannot open click emphasis soundfile %1 (%2)"), path, errbuf) << endmsg;
 199                                 return;
 200                         }
 201
 202                         click_emphasis_data = new Sample[info.frames];
 203                         click_emphasis_length = info.frames;
 204
 205                         if (sf_read_float (sndfile, click_emphasis_data, info.frames) != info.frames) {
 206                                 warning << _("cannot read data from click emphasis soundfile") << endmsg;
 207                                 delete click_emphasis_data;
 208                                 click_emphasis_data = 0;
 209                         }
 210
 211                         sf_close (sndfile);
 212                 }
 213         }
 214 }
 215
 216 void
 217 Session::clear_clicks ()
 218 {
 219         Glib::RWLock::WriterLock lm (click_lock);
 220
 221         for (Clicks::iterator i = clicks.begin(); i != clicks.end(); ++i) {
 222                 delete *i;
 223         }
 224
 225         clicks.clear ();
 226 }