cinelerra-5.1/cinelerra/iec61883input.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 "condition.h"
  23 #include "iec61883input.h"
  24 #include "language.h"
  25 #include "mutex.h"
  26 #include "vframe.h"
  27
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/mman.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <unistd.h>
  35
  36 #define INPUT_SAMPLES 131072
  37 #define BUFFER_TIMEOUT 500000
  38
  39
  40 IEC61883Input::IEC61883Input()
  41  : Thread(1, 1, 0)
  42 {
  43         frame = 0;
  44         handle = 0;
  45         fd = 0;
  46         buffer = 0;
  47         buffer_valid = 0;
  48         input_buffer = 0;
  49         done = 0;
  50         total_buffers = 0;
  51         current_inbuffer = 0;
  52         current_outbuffer = 0;
  53         buffer_size = 0;
  54         audio_buffer = 0;
  55         audio_samples = 0;
  56         video_lock = 0;
  57         audio_lock = 0;
  58         buffer_lock = 0;
  59         decoder = 0;
  60 }
  61
  62 IEC61883Input::~IEC61883Input()
  63 {
  64 // Driver crashes if it isn't stopped before cancelling the thread.
  65 // May still crash during the cancel though.
  66
  67         if(Thread::running())
  68         {
  69                 done = 1;
  70         }
  71         Thread::join();
  72
  73         if(buffer)
  74         {
  75                 for(int i = 0; i < total_buffers; i++)
  76                         delete [] buffer[i];
  77                 delete [] buffer;
  78                 delete [] buffer_valid;
  79         }
  80
  81         if(input_buffer)
  82                 munmap(input_buffer, total_buffers * buffer_size);
  83
  84         if(audio_buffer)
  85         {
  86                 delete [] audio_buffer;
  87         }
  88
  89         if(decoder)
  90         {
  91                 dv_delete(decoder);
  92         }
  93
  94         if(video_lock) delete video_lock;
  95         if(audio_lock) delete audio_lock;
  96         if(buffer_lock) delete buffer_lock;
  97         if(frame) iec61883_dv_fb_close(frame);
  98         if(handle) raw1394_destroy_handle(handle);
  99 }
 100
 101 static int write_frame_static(unsigned char *data, int len, int complete, void *ptr)
 102 {
 103         IEC61883Input *input = (IEC61883Input*)ptr;
 104         return input->write_frame(data, len, complete);
 105 }
 106
 107
 108
 109 int IEC61883Input::open(int port,
 110         int channel,
 111         int length,
 112         int channels,
 113         int samplerate,
 114         int bits,
 115         int w,
 116         int h)
 117 {
 118         this->port = port;
 119         this->channel = channel;
 120         this->length = length;
 121         this->channels = channels;
 122         this->samplerate = samplerate;
 123         this->bits = bits;
 124         this->w = w;
 125         this->h = h;
 126         is_pal = (h == 576);
 127         buffer_size = is_pal ? DV_PAL_SIZE : DV_NTSC_SIZE;
 128         total_buffers = length;
 129
 130
 131 // Initialize grabbing
 132         if(!handle)
 133         {
 134                 handle = raw1394_new_handle_on_port(port);
 135                 if(handle)
 136                 {
 137                         frame = iec61883_dv_fb_init(handle, write_frame_static, (void *)this);
 138                         if(frame)
 139                         {
 140                                 if(!iec61883_dv_fb_start(frame, channel))
 141                                 {
 142                                         fd = raw1394_get_fd(handle);
 143                                 }
 144                         }
 145                 }
 146
 147                 buffer = new char*[total_buffers];
 148                 buffer_valid = new int[total_buffers];
 149                 bzero(buffer_valid, sizeof(int) * total_buffers);
 150                 for(int i = 0; i < total_buffers; i++)
 151                 {
 152                         buffer[i] = new char[DV_PAL_SIZE];
 153                 }
 154
 155
 156                 audio_buffer = new char[INPUT_SAMPLES * 2 * channels];
 157
 158                 audio_lock = new Condition(0, "IEC61883Input::audio_lock");
 159                 video_lock = new Condition(0, "IEC61883Input::video_lock");
 160                 buffer_lock = new Mutex("IEC61883Input::buffer_lock");
 161
 162                 decoder = dv_new();
 163
 164                 Thread::start();
 165         }
 166
 167         if(!handle || !frame || !fd) return 1;
 168
 169         return 0;
 170 }
 171
 172
 173 void IEC61883Input::run()
 174 {
 175         while(!done && handle)
 176         {
 177                 struct timeval tv;
 178                 fd_set rfds;
 179                 FD_ZERO(&rfds);
 180                 FD_SET(fd, &rfds);
 181                 tv.tv_sec = 0;
 182                 tv.tv_usec = 20000;
 183                 if(select(fd + 1, &rfds, 0, 0, &tv) > 0)
 184                 {
 185                         raw1394_loop_iterate(handle);
 186                 }
 187         }
 188
 189 }
 190
 191
 192
 193
 194
 195
 196
 197
 198 int IEC61883Input::write_frame(unsigned char *data, int len, int complete)
 199 {
 200         if(!complete) printf(_("write_frame: incomplete frame received.\n"));
 201
 202         buffer_lock->lock("IEC61883Input write_frame 1");
 203
 204 // Get a buffer to transfer to
 205         char *dst = 0;
 206         int is_overflow = 0;
 207         if(!buffer_valid[current_inbuffer])
 208                 dst = buffer[current_inbuffer];
 209         else
 210                 is_overflow = 1;
 211
 212         char *src = (char*)(data);
 213 // static FILE *test = 0;
 214 // if(!test) test = fopen("/tmp/test", "w");
 215 // fwrite(src, buffer_size, 1, test);
 216
 217 // Export the video
 218         if(dst)
 219         {
 220                 memcpy(dst, src, len);
 221                 buffer_valid[current_inbuffer] = 1;
 222                 video_lock->unlock();
 223         }
 224
 225
 226 // Extract the audio
 227         if(audio_samples < INPUT_SAMPLES - 2048)
 228         {
 229                 int audio_result = dv_read_audio(decoder,
 230                         (unsigned char*)audio_buffer +
 231                                 audio_samples * 2 * 2,
 232                         (unsigned char*)src,
 233                         len,
 234                         channels,
 235                         bits);
 236                 int real_freq = decoder->decoder->audio->frequency;
 237                 if (real_freq == 32000)
 238                 {
 239 // do in-place _FAST_ && _SIMPLE_ upsampling to 48khz
 240 // i also think user should get a warning that his material is effectively 32khz
 241 // we take 16bit samples for both channels in one 32bit int
 242                         int *twosample = (int*) (audio_buffer + audio_samples * 2 * 2);
 243                         int from = audio_result - 1;
 244                         int new_result = audio_result * 48000 / real_freq;
 245                         for (int to = new_result - 1; to >=0; to--)
 246                         {
 247                                 if ((to % 3) == 0 || (to % 3) == 1) from --;
 248                                 twosample[to] = twosample[from];
 249                         }
 250                         audio_result = new_result;
 251                 }
 252
 253
 254                 audio_samples += audio_result;
 255
 256 // Export the audio
 257                 audio_lock->unlock();
 258         }
 259
 260 // Advance buffer
 261         if(!is_overflow)
 262                 increment_counter(&current_inbuffer);
 263
 264
 265         buffer_lock->unlock();
 266         return 0;
 267 }
 268
 269
 270
 271
 272
 273
 274
 275 void IEC61883Input::increment_counter(int *counter)
 276 {
 277         (*counter)++;
 278         if(*counter >= total_buffers) *counter = 0;
 279 }
 280
 281 void IEC61883Input::decrement_counter(int *counter)
 282 {
 283         (*counter)--;
 284         if(*counter < 0) *counter = total_buffers - 1;
 285 }
 286
 287
 288
 289 int IEC61883Input::read_video(VFrame *data)
 290 {
 291         int result = 0;
 292
 293 // Take over buffer table
 294         buffer_lock->lock("IEC61883Input::read_video 1");
 295 // Wait for buffer with timeout
 296         while(!buffer_valid[current_outbuffer] && !result)
 297         {
 298                 buffer_lock->unlock();
 299                 result = video_lock->timed_lock(BUFFER_TIMEOUT, "IEC61883Input::read_video 2");
 300                 buffer_lock->lock("IEC61883Input::read_video 3");
 301         }
 302
 303 // Copy frame
 304         if(buffer_valid[current_outbuffer])
 305         {
 306                 data->allocate_compressed_data(buffer_size);
 307                 data->set_compressed_size(buffer_size);
 308                 memcpy(data->get_data(), buffer[current_outbuffer], buffer_size);
 309                 buffer_valid[current_outbuffer] = 0;
 310                 increment_counter(&current_outbuffer);
 311         }
 312
 313         buffer_lock->unlock();
 314         return result;
 315 }
 316
 317
 318
 319
 320 int IEC61883Input::read_audio(char *data, int samples)
 321 {
 322         int result = 0;
 323         int timeout = (int64_t)samples * (int64_t)1000000 * (int64_t)2 / (int64_t)samplerate;
 324         if(timeout < 500000) timeout = 500000;
 325
 326 // Take over buffer table
 327         buffer_lock->lock("IEC61883Input::read_audio 1");
 328 // Wait for buffer with timeout
 329         while(audio_samples < samples && !result)
 330         {
 331                 buffer_lock->unlock();
 332                 result = audio_lock->timed_lock(timeout, "IEC61883Input::read_audio 2");
 333                 buffer_lock->lock("IEC61883Input::read_audio 3");
 334         }
 335
 336         if(audio_samples >= samples)
 337         {
 338                 memcpy(data, audio_buffer, samples * bits * channels / 8);
 339                 memcpy(audio_buffer,
 340                         audio_buffer + samples * bits * channels / 8,
 341                         (audio_samples - samples) * bits * channels / 8);
 342                 audio_samples -= samples;
 343         }
 344
 345         buffer_lock->unlock();
 346         return result;
 347 }
 348
 349
 350
 351
 352