cinelerra-5.1/plugins/loopaudio/loopaudio.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bcdisplayinfo.h"
  23 #include "clip.h"
  24 #include "bchash.h"
  25 #include "filexml.h"
  26 #include "guicast.h"
  27 #include "language.h"
  28 #include "pluginaclient.h"
  29 #include "samples.h"
  30 #include "transportque.h"
  31
  32 #include <string.h>
  33
  34 class LoopAudio;
  35
  36 class LoopAudioConfig
  37 {
  38 public:
  39         LoopAudioConfig();
  40         int64_t samples;
  41 };
  42
  43
  44 class LoopAudioSamples : public BC_TextBox
  45 {
  46 public:
  47         LoopAudioSamples(LoopAudio *plugin,
  48                 int x,
  49                 int y);
  50         int handle_event();
  51         LoopAudio *plugin;
  52 };
  53
  54 class LoopAudioWindow : public PluginClientWindow
  55 {
  56 public:
  57         LoopAudioWindow(LoopAudio *plugin);
  58         ~LoopAudioWindow();
  59         void create_objects();
  60         LoopAudio *plugin;
  61         LoopAudioSamples *samples;
  62 };
  63
  64
  65
  66 class LoopAudio : public PluginAClient
  67 {
  68 public:
  69         LoopAudio(PluginServer *server);
  70         ~LoopAudio();
  71
  72         PLUGIN_CLASS_MEMBERS(LoopAudioConfig)
  73
  74         void save_data(KeyFrame *keyframe);
  75         void read_data(KeyFrame *keyframe);
  76         void update_gui();
  77         int is_realtime();
  78         int is_synthesis();
  79         int process_buffer(int64_t size,
  80                 Samples *buffer,
  81                 int64_t start_position,
  82                 int sample_rate);
  83 };
  84
  85
  86
  87
  88
  89
  90
  91 REGISTER_PLUGIN(LoopAudio);
  92
  93
  94
  95 LoopAudioConfig::LoopAudioConfig()
  96 {
  97         samples = 48000;
  98 }
  99
 100
 101
 102
 103
 104 LoopAudioWindow::LoopAudioWindow(LoopAudio *plugin)
 105  : PluginClientWindow(plugin,
 106         xS(180),
 107         yS(65),
 108         xS(180),
 109         yS(65),
 110         0)
 111 {
 112         this->plugin = plugin;
 113 }
 114
 115 LoopAudioWindow::~LoopAudioWindow()
 116 {
 117 }
 118
 119 void LoopAudioWindow::create_objects()
 120 {
 121         int xs10 = xS(10);
 122         int ys10 = yS(10), ys20 = yS(20);
 123         int x = xs10, y = ys10;
 124
 125         add_subwindow(new BC_Title(x, y, _("Samples to loop:")));
 126         y += ys20;
 127         add_subwindow(samples = new LoopAudioSamples(plugin,
 128                 x,
 129                 y));
 130         show_window();
 131         flush();
 132 }
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142 LoopAudioSamples::LoopAudioSamples(LoopAudio *plugin,
 143         int x,
 144         int y)
 145  : BC_TextBox(x,
 146         y,
 147         xS(100),
 148         1,
 149         plugin->config.samples)
 150 {
 151         this->plugin = plugin;
 152         set_precision(2);
 153 }
 154
 155 int LoopAudioSamples::handle_event()
 156 {
 157         plugin->config.samples = atol(get_text());
 158         plugin->config.samples = MAX(1, plugin->config.samples);
 159         plugin->send_configure_change();
 160         return 1;
 161 }
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171 LoopAudio::LoopAudio(PluginServer *server)
 172  : PluginAClient(server)
 173 {
 174
 175 }
 176
 177
 178 LoopAudio::~LoopAudio()
 179 {
 180
 181 }
 182
 183 const char* LoopAudio::plugin_title() { return N_("Loop audio"); }
 184 int LoopAudio::is_realtime() { return 1; }
 185 int LoopAudio::is_synthesis() { return 1; }
 186
 187
 188
 189 NEW_WINDOW_MACRO(LoopAudio, LoopAudioWindow)
 190
 191
 192 int LoopAudio::process_buffer(int64_t size,
 193         Samples *buffer,
 194         int64_t start_position,
 195         int sample_rate)
 196 {
 197         int64_t current_position = start_position;
 198         int step = (get_direction() == PLAY_FORWARD) ? 1 : -1;
 199         int fragment_size;
 200         int64_t current_loop_end;
 201
 202 //printf("LoopAudio::process_buffer 1 %lld %d\n", start_position, size);
 203
 204         current_position = start_position;
 205
 206         for(int i = 0; i < size; i += fragment_size)
 207         {
 208 // Truncate to end of buffer
 209                 fragment_size = MIN(size - i, size);
 210
 211                 int64_t current_loop_position;
 212
 213 // Truncate to next keyframe
 214                 if(get_direction() == PLAY_FORWARD)
 215                 {
 216                         KeyFrame *next_keyframe = get_next_keyframe(current_position);
 217                         int64_t next_position = edl_to_local(next_keyframe->position);
 218                         if(next_position > current_position)
 219                                 fragment_size = MIN(fragment_size, next_position - current_position);
 220
 221 // Get start of current loop
 222                         KeyFrame *prev_keyframe = get_prev_keyframe(current_position);
 223                         int64_t prev_position = edl_to_local(prev_keyframe->position);
 224                         if(prev_position == 0)
 225                                 prev_position = get_source_start();
 226                         read_data(prev_keyframe);
 227
 228 // Get start of fragment in current loop
 229                         current_loop_position = prev_position +
 230                                 ((current_position - prev_position) %
 231                                         config.samples);
 232                         while(current_loop_position < prev_position) current_loop_position += config.samples;
 233                         while(current_loop_position >= prev_position + config.samples) current_loop_position -= config.samples;
 234
 235 // Truncate fragment to end of loop
 236                         current_loop_end = current_position -
 237                                 current_loop_position +
 238                                 prev_position +
 239                                 config.samples;
 240                         fragment_size = MIN(current_loop_end - current_position,
 241                                 fragment_size);
 242                 }
 243                 else
 244                 {
 245                         KeyFrame *next_keyframe = get_prev_keyframe(current_position);
 246                         int64_t next_position = edl_to_local(next_keyframe->position);
 247                         if(next_position < current_position)
 248                                 fragment_size = MIN(fragment_size, current_position - next_position);
 249
 250                         KeyFrame *prev_keyframe = get_next_keyframe(current_position);
 251                         int64_t prev_position = edl_to_local(prev_keyframe->position);
 252                         if(prev_position == 0)
 253                                 prev_position = get_source_start() + get_total_len();
 254                         read_data(prev_keyframe);
 255
 256                         current_loop_position = prev_position -
 257                                 ((prev_position - current_position) %
 258                                           config.samples);
 259                         while(current_loop_position <= prev_position - config.samples) current_loop_position += config.samples;
 260                         while(current_loop_position > prev_position) current_loop_position -= config.samples;
 261
 262 // Truncate fragment to end of loop
 263                         current_loop_end = current_position +
 264                                 prev_position -
 265                                 current_loop_position -
 266                                 config.samples;
 267                         fragment_size = MIN(current_position - current_loop_end,
 268                                 fragment_size);
 269                 }
 270
 271
 272 // printf("LoopAudio::process_buffer 100 %lld %lld %lld %d\n",
 273 // current_position, current_loop_position, current_loop_end, fragment_size);
 274                 int offset = buffer->get_offset();
 275                 buffer->set_offset(offset + i);
 276                 read_samples(buffer,
 277                         0,
 278                         sample_rate,
 279                         current_loop_position,
 280                         fragment_size);
 281                 buffer->set_offset(offset);
 282
 283
 284                 current_position += step * fragment_size;
 285         }
 286
 287
 288         return 0;
 289 }
 290
 291
 292
 293
 294 int LoopAudio::load_configuration()
 295 {
 296         KeyFrame *prev_keyframe;
 297         int64_t old_samples = config.samples;
 298         prev_keyframe = get_prev_keyframe(get_source_position());
 299         read_data(prev_keyframe);
 300         return old_samples != config.samples;
 301 }
 302
 303
 304 void LoopAudio::save_data(KeyFrame *keyframe)
 305 {
 306         FileXML output;
 307
 308 // cause data to be stored directly in text
 309         output.set_shared_output(keyframe->xbuf);
 310         output.tag.set_title("LOOPAUDIO");
 311         output.tag.set_property("SAMPLES", config.samples);
 312         output.append_tag();
 313         output.tag.set_title("/LOOPAUDIO");
 314         output.append_tag();
 315         output.append_newline();
 316         output.terminate_string();
 317 }
 318
 319 void LoopAudio::read_data(KeyFrame *keyframe)
 320 {
 321         FileXML input;
 322
 323         input.set_shared_input(keyframe->xbuf);
 324
 325         while(!input.read_tag())
 326         {
 327                 if(input.tag.title_is("LOOPAUDIO"))
 328                 {
 329                         config.samples = input.tag.get_property("SAMPLES", config.samples);
 330                 }
 331         }
 332 }
 333
 334 void LoopAudio::update_gui()
 335 {
 336         if(thread)
 337         {
 338                 load_configuration();
 339                 thread->window->lock_window();
 340                 ((LoopAudioWindow*)thread->window)->samples->update(config.samples);
 341                 thread->window->unlock_window();
 342         }
 343 }
 344
 345
 346
 347
 348