cinelerra-5.0/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 "mutex.h"
  25 #include "vframe.h"
  26
  27 #include <errno.h>
  28 #include <fcntl.h>
  29 #include <sys/ioctl.h>
  30 #include <sys/mman.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33 #include <unistd.h>
  34
  35 #define INPUT_SAMPLES 131072
  36 #define BUFFER_TIMEOUT 500000
  37
  38
  39 IEC61883Input::IEC61883Input()
  40  : Thread(1, 1, 0)
  41 {
  42         frame = 0;
  43         handle = 0;
  44         fd = 0;
  45         buffer = 0;
  46         buffer_valid = 0;
  47         input_buffer = 0;
  48         done = 0;
  49         total_buffers = 0;
  50         current_inbuffer = 0;
  51         current_outbuffer = 0;
  52         buffer_size = 0;
  53         audio_buffer = 0;
  54         audio_samples = 0;
  55         video_lock = 0;
  56         audio_lock = 0;
  57         buffer_lock = 0;
  58         decoder = 0;
  59 }
  60
  61 IEC61883Input::~IEC61883Input()
  62 {
  63 // Driver crashes if it isn't stopped before cancelling the thread.
  64 // May still crash during the cancel though.
  65
  66         if(Thread::running())
  67         {
  68                 done = 1;
  69                 Thread::join();
  70         }
  71
  72         if(buffer)
  73         {
  74                 for(int i = 0; i < total_buffers; i++)
  75                         delete [] buffer[i];
  76                 delete [] buffer;
  77                 delete [] buffer_valid;
  78         }
  79
  80         if(input_buffer)
  81                 munmap(input_buffer, total_buffers * buffer_size);
  82
  83         if(audio_buffer)
  84         {
  85                 delete [] audio_buffer;
  86         }
  87
  88         if(decoder)
  89         {
  90                 dv_delete(decoder);
  91         }
  92
  93         if(video_lock) delete video_lock;
  94         if(audio_lock) delete audio_lock;
  95         if(buffer_lock) delete buffer_lock;
  96         if(frame) iec61883_dv_fb_close(frame);
  97         if(handle) raw1394_destroy_handle(handle);
  98 }
  99
 100 static int write_frame_static(unsigned char *data, int len, int complete, void *ptr)
 101 {
 102         IEC61883Input *input = (IEC61883Input*)ptr;
 103         return input->write_frame(data, len, complete);
 104 }
 105
 106
 107
 108 int IEC61883Input::open(int port,
 109         int channel,
 110         int length,
 111         int channels,
 112         int samplerate,
 113         int bits,
 114         int w,
 115         int h)
 116 {
 117         this->port = port;
 118         this->channel = channel;
 119         this->length = length;
 120         this->channels = channels;
 121         this->samplerate = samplerate;
 122         this->bits = bits;
 123         this->w = w;
 124         this->h = h;
 125         is_pal = (h == 576);
 126         buffer_size = is_pal ? DV_PAL_SIZE : DV_NTSC_SIZE;
 127         total_buffers = length;
 128
 129
 130 // Initialize grabbing
 131         if(!handle)
 132         {
 133                 handle = raw1394_new_handle_on_port(port);
 134                 if(handle)
 135                 {
 136                         frame = iec61883_dv_fb_init(handle, write_frame_static, (void *)this);
 137                         if(frame)
 138                         {
 139                                 if(!iec61883_dv_fb_start(frame, channel))
 140                                 {
 141                                         fd = raw1394_get_fd(handle);
 142                                 }
 143                         }
 144                 }
 145
 146                 buffer = new char*[total_buffers];
 147                 buffer_valid = new int[total_buffers];
 148                 bzero(buffer_valid, sizeof(int) * total_buffers);
 149                 for(int i = 0; i < total_buffers; i++)
 150                 {
 151                         buffer[i] = new char[DV_PAL_SIZE];
 152                 }
 153
 154
 155                 audio_buffer = new char[INPUT_SAMPLES * 2 * channels];
 156
 157                 audio_lock = new Condition(0, "IEC61883Input::audio_lock");
 158                 video_lock = new Condition(0, "IEC61883Input::video_lock");
 159                 buffer_lock = new Mutex("IEC61883Input::buffer_lock");
 160
 161                 decoder = dv_new();
 162
 163                 Thread::start();
 164         }
 165
 166         if(!handle || !frame || !fd) return 1;
 167
 168         return 0;
 169 }
 170
 171
 172 void IEC61883Input::run()
 173 {
 174         while(!done && handle)
 175         {
 176                 struct timeval tv;
 177                 fd_set rfds;
 178                 FD_ZERO(&rfds);
 179                 FD_SET(fd, &rfds);
 180                 tv.tv_sec = 0;
 181                 tv.tv_usec = 20000;
 182                 if(select(fd + 1, &rfds, 0, 0, &tv) > 0)
 183                 {
 184                         raw1394_loop_iterate(handle);
 185                 }
 186         }
 187
 188 }
 189
 190
 191
 192
 193
 194
 195
 196
 197 int IEC61883Input::write_frame(unsigned char *data, int len, int complete)
 198 {
 199         if(!complete) printf("write_frame: incomplete frame received.\n");
 200
 201         buffer_lock->lock("IEC61883Input write_frame 1");
 202
 203 // Get a buffer to transfer to
 204         char *dst = 0;
 205         int is_overflow = 0;
 206         if(!buffer_valid[current_inbuffer])
 207                 dst = buffer[current_inbuffer];
 208         else
 209                 is_overflow = 1;
 210
 211         char *src = (char*)(data);
 212 // static FILE *test = 0;
 213 // if(!test) test = fopen("/tmp/test", "w");
 214 // fwrite(src, buffer_size, 1, test);
 215
 216 // Export the video
 217         if(dst)
 218         {
 219                 memcpy(dst, src, len);
 220                 buffer_valid[current_inbuffer] = 1;
 221                 video_lock->unlock();
 222         }
 223
 224
 225 // Extract the audio
 226         if(audio_samples < INPUT_SAMPLES - 2048)
 227         {
 228                 int audio_result = dv_read_audio(decoder,
 229                         (unsigned char*)audio_buffer +
 230                                 audio_samples * 2 * 2,
 231                         (unsigned char*)src,
 232                         len,
 233                         channels,
 234                         bits);
 235                 int real_freq = decoder->decoder->audio->frequency;
 236                 if (real_freq == 32000)
 237                 {
 238 // do in-place _FAST_ && _SIMPLE_ upsampling to 48khz
 239 // i also think user should get a warning that his material is effectively 32khz
 240 // we take 16bit samples for both channels in one 32bit int
 241                         int *twosample = (int*) (audio_buffer + audio_samples * 2 * 2);
 242                         int from = audio_result - 1;
 243                         int new_result = audio_result * 48000 / real_freq;
 244                         for (int to = new_result - 1; to >=0; to--)
 245                         {
 246                                 if ((to % 3) == 0 || (to % 3) == 1) from --;
 247                                 twosample[to] = twosample[from];
 248                         }
 249                         audio_result = new_result;
 250                 }
 251
 252
 253                 audio_samples += audio_result;
 254
 255 // Export the audio
 256                 audio_lock->unlock();
 257         }
 258
 259 // Advance buffer
 260         if(!is_overflow)
 261                 increment_counter(&current_inbuffer);
 262
 263
 264         buffer_lock->unlock();
 265         return 0;
 266 }
 267
 268
 269
 270
 271
 272
 273
 274 void IEC61883Input::increment_counter(int *counter)
 275 {
 276         (*counter)++;
 277         if(*counter >= total_buffers) *counter = 0;
 278 }
 279
 280 void IEC61883Input::decrement_counter(int *counter)
 281 {
 282         (*counter)--;
 283         if(*counter < 0) *counter = total_buffers - 1;
 284 }
 285
 286
 287
 288 int IEC61883Input::read_video(VFrame *data)
 289 {
 290         int result = 0;
 291
 292 // Take over buffer table
 293         buffer_lock->lock("IEC61883Input::read_video 1");
 294 // Wait for buffer with timeout
 295         while(!buffer_valid[current_outbuffer] && !result)
 296         {
 297                 buffer_lock->unlock();
 298                 result = video_lock->timed_lock(BUFFER_TIMEOUT, "IEC61883Input::read_video 2");
 299                 buffer_lock->lock("IEC61883Input::read_video 3");
 300         }
 301
 302 // Copy frame
 303         if(buffer_valid[current_outbuffer])
 304         {
 305                 data->allocate_compressed_data(buffer_size);
 306                 data->set_compressed_size(buffer_size);
 307                 memcpy(data->get_data(), buffer[current_outbuffer], buffer_size);
 308                 buffer_valid[current_outbuffer] = 0;
 309                 increment_counter(&current_outbuffer);
 310         }
 311
 312         buffer_lock->unlock();
 313         return result;
 314 }
 315
 316
 317
 318
 319 int IEC61883Input::read_audio(char *data, int samples)
 320 {
 321         int result = 0;
 322         int timeout = (int64_t)samples * (int64_t)1000000 * (int64_t)2 / (int64_t)samplerate;
 323         if(timeout < 500000) timeout = 500000;
 324
 325 // Take over buffer table
 326         buffer_lock->lock("IEC61883Input::read_audio 1");
 327 // Wait for buffer with timeout
 328         while(audio_samples < samples && !result)
 329         {
 330                 buffer_lock->unlock();
 331                 result = audio_lock->timed_lock(timeout, "IEC61883Input::read_audio 2");
 332                 buffer_lock->lock("IEC61883Input::read_audio 3");
 333         }
 334
 335         if(audio_samples >= samples)
 336         {
 337                 memcpy(data, audio_buffer, samples * bits * channels / 8);
 338                 memcpy(audio_buffer,
 339                         audio_buffer + samples * bits * channels / 8,
 340                         (audio_samples - samples) * bits * channels / 8);
 341                 audio_samples -= samples;
 342         }
 343
 344         buffer_lock->unlock();
 345         return result;
 346 }
 347
 348
 349
 350
 351