cinelerra-5.1/cinelerra/devicev4l2base.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
  23 #ifdef HAVE_VIDEO4LINUX2
  24
  25 #include "bctimer.h"
  26 #include "channel.h"
  27 #include "chantables.h"
  28 #include "clip.h"
  29 #include "condition.h"
  30 #include "devicev4l2base.h"
  31 #include "mutex.h"
  32 #include "picture.h"
  33 #include "preferences.h"
  34 #include "recordconfig.h"
  35 #include "videodevice.h"
  36
  37 #include <stdio.h>
  38 #include <stdlib.h>
  39 #include <stdint.h>
  40 #include <unistd.h>
  41 #include <string.h>
  42 #include <errno.h>
  43 #include <fcntl.h>
  44
  45 #include <linux/videodev2.h>
  46 #include <sys/ioctl.h>
  47 #include <sys/mman.h>
  48
  49
  50 DeviceV4L2BufferQ::
  51 DeviceV4L2BufferQ(int qsize)
  52 {
  53         reset();
  54         bfr_lock = new Mutex("DeviceV4L2BufferQ::bfr_lock");
  55         buffers = new int[limit=qsize];
  56 }
  57
  58 DeviceV4L2BufferQ::
  59 ~DeviceV4L2BufferQ()
  60 {
  61         delete [] buffers;
  62         delete bfr_lock;
  63 }
  64
  65 int DeviceV4L2BufferQ::q(int bfr)
  66 {
  67         int result = 0;
  68         bfr_lock->lock("DeviceV4L2Buffer::q");
  69         int in1 = in+1;
  70         if( in1 >= limit ) in1 = 0;
  71         if( in1 != out )
  72         {
  73                 buffers[in] = bfr;
  74                 in = in1;
  75         }
  76         else
  77                 result = -1;
  78         bfr_lock->unlock();
  79         return result;
  80 }
  81
  82 int DeviceV4L2BufferQ::dq(Condition *time_lock, int time_out)
  83 {
  84         int result = -1;
  85         bfr_lock->lock(" DeviceV4L2Buffer::dq 0");
  86         time_lock->reset();
  87         if( in == out )
  88         {
  89                 bfr_lock->unlock();
  90                 if( time_lock->timed_lock(time_out, "DeviceV4L2Buffer::dq 1") )
  91                         printf("DeviceV4L2Buffer::wait time_out\n");
  92                 bfr_lock->lock(" DeviceV4L2Buffer::dq 2");
  93         }
  94         if( in != out )
  95         {
  96                 result = buffers[out];
  97                 int out1 = out+1;
  98                 if( out1 >= limit ) out1 = 0;
  99                 out = out1;
 100         }
 101         bfr_lock->unlock();
 102         return result;
 103 }
 104
 105 int DeviceV4L2BufferQ::dq()
 106 {
 107         int result = -1;
 108         bfr_lock->lock(" DeviceV4L2Buffer::dq");
 109         if( in != out )
 110         {
 111                 result = buffers[out];
 112                 int out1 = out+1;
 113                 if( out1 >= limit ) out1 = 0;
 114                 out = out1;
 115         }
 116         bfr_lock->unlock();
 117         return result;
 118 }
 119
 120
 121
 122 DeviceV4L2Base::DeviceV4L2Base()
 123  : Thread(1, 0, 0)
 124 {
 125         v4l2_lock = new Mutex("DeviceV4L2Input::v4l2_lock", 0);
 126         qbfrs_lock = new Mutex("DeviceV4L2Base::qbfrs_lock");
 127         video_lock = new Condition(0, "DeviceV4L2Base::video_lock", 1);
 128         dev_fd = -1;
 129         iwidth = 0;
 130         iheight = 0;
 131         color_model = -1;
 132         device_buffers = 0;
 133         device_channel = 0;
 134         total_buffers = 0;
 135         streamon = 0;
 136         dev_status = 0;
 137         opened = 0;
 138         q_bfrs = 0;
 139         done = 0;
 140         put_thread = 0;
 141 }
 142
 143 DeviceV4L2Base::~DeviceV4L2Base()
 144 {
 145         close_dev();
 146         delete video_lock;
 147         delete qbfrs_lock;
 148         delete v4l2_lock;
 149 }
 150
 151
 152
 153 DeviceV4L2Put::DeviceV4L2Put(DeviceV4L2Base *v4l2)
 154  : Thread(1, 0, 0)
 155 {
 156         this->v4l2 = v4l2;
 157         done = 0;
 158         putq = new DeviceV4L2BufferQ(256);
 159         buffer_lock = new Condition(0, "DeviceV4L2Put::buffer_lock");
 160 }
 161
 162 DeviceV4L2Put::~DeviceV4L2Put()
 163 {
 164         if(Thread::running())
 165         {
 166                 done = 1;
 167                 buffer_lock->unlock();
 168                 Thread::cancel();
 169         }
 170         Thread::join();
 171         delete buffer_lock;
 172         delete putq;
 173 }
 174
 175
 176 void DeviceV4L2Put::run()
 177 {
 178         while(!done)
 179         {
 180                 buffer_lock->lock("DeviceV4L2Put::run");
 181                 if(done) break;
 182                 int bfr = putq->dq();
 183                 if( bfr < 0 ) continue;
 184                 struct v4l2_buffer arg;
 185                 memset(&arg, 0, sizeof(arg));
 186                 arg.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 187                 arg.index = bfr;
 188                 arg.memory = V4L2_MEMORY_MMAP;
 189
 190                 Thread::enable_cancel();
 191                 v4l2->qbfrs_lock->lock("DeviceV4L2Put::run");
 192 // This locks up if there's no signal.
 193                 if( v4l2->vioctl(VIDIOC_QBUF, &arg) < 0 )
 194                         perror("DeviceV4L2Put::run 1 VIDIOC_QBUF");
 195                 else
 196                         ++v4l2->q_bfrs;
 197                 v4l2->qbfrs_lock->unlock();
 198                 Thread::disable_cancel();
 199         }
 200 }
 201
 202
 203
 204
 205 int DeviceV4L2Base::get_sources()
 206 {
 207         v4l2_lock->lock("DeviceV4L2Base::get_sources");
 208         VideoDevice *video_device = v4l2_device();
 209         if( !video_device ) return 1;
 210         const char *dev_path = video_device->in_config->get_path();
 211         int vfd = open(dev_path, O_RDWR+O_CLOEXEC);
 212         if(vfd < 0)
 213         {
 214                 perror("DeviceV4L2Base::get_sources open failed");
 215                 printf("DeviceV4L2Base::get_sources path: %s\n", dev_path);
 216                 return 1;
 217         }
 218
 219 // Get the Inputs
 220
 221         for(int i = 0; i < 20; ++i)
 222         {
 223                 struct v4l2_input arg;
 224                 memset(&arg, 0, sizeof(arg));
 225                 arg.index = i;
 226
 227                 if(ioctl(vfd, VIDIOC_ENUMINPUT, &arg) < 0) break;
 228                 Channel *channel = video_device->new_input_source((char*)arg.name);
 229                 channel->device_index = i;
 230                 channel->tuner = arg.type == V4L2_INPUT_TYPE_TUNER ? arg.tuner : -1;
 231         }
 232
 233 // Get the picture controls
 234         for(int i = V4L2_CID_BASE; i < V4L2_CID_LASTP1; i++)
 235         {
 236                 struct v4l2_queryctrl arg;
 237                 memset(&arg, 0, sizeof(arg));
 238                 arg.id = i;
 239 // This returns errors for unsupported controls which is what we want.
 240                 if(!ioctl(vfd, VIDIOC_QUERYCTRL, &arg))
 241                 {
 242 // Test if control exists already
 243                         if(!video_device->picture->get_item((const char*)arg.name, arg.id))
 244                         {
 245 // Add control
 246                                 PictureItem *item = video_device->picture->new_item((const char*)arg.name);
 247                                 item->device_id = arg.id;
 248                                 item->min = arg.minimum;
 249                                 item->max = arg.maximum;
 250                                 item->step = arg.step;
 251                                 item->default_ = arg.default_value;
 252                                 item->type = arg.type;
 253                                 item->value = arg.default_value;
 254                         }
 255                 }
 256         }
 257
 258 // Load defaults for picture controls
 259         video_device->picture->load_defaults();
 260
 261         close(vfd);
 262         v4l2_lock->unlock();
 263         return 0;
 264 }
 265
 266 int DeviceV4L2Base::vioctl(unsigned long int req, void *arg)
 267 {
 268         int result = ioctl(dev_fd, req, arg);
 269         return result;
 270 }
 271
 272 int DeviceV4L2Base::v4l2_open(int color_model)
 273 {
 274         VideoDevice *video_device = v4l2_device();
 275         if( !video_device ) return 1;
 276
 277         struct v4l2_capability cap;
 278         memset(&cap, 0, sizeof(cap));
 279         if(vioctl(VIDIOC_QUERYCAP, &cap))
 280                 perror("DeviceV4L2Base::v4l2_open VIDIOC_QUERYCAP");
 281
 282 // printf("DeviceV4L2Base::v4l2_open dev_fd=%d driver=%s card=%s bus_info=%s version=%d\n",
 283 // dev_fd(), cap.driver, cap.card, cap.bus_info, cap.version);
 284 // printf("    ");
 285 // if( (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE) ) printf("VIDEO_CAPTURE ");
 286 // if( (cap.capabilities & V4L2_CAP_VIDEO_OUTPUT)  ) printf("VIDEO_OUTPUT ");
 287 // if( (cap.capabilities & V4L2_CAP_VIDEO_OVERLAY) ) printf("VIDEO_OVERLAY ");
 288 // if( (cap.capabilities & V4L2_CAP_VBI_CAPTURE)   ) printf("VBI_CAPTURE ");
 289 // if( (cap.capabilities & V4L2_CAP_VBI_OUTPUT)    ) printf("VBI_OUTPUT ");
 290 // if( (cap.capabilities & V4L2_CAP_RDS_CAPTURE)   ) printf("RDS_CAPTURE ");
 291 // if( (cap.capabilities & V4L2_CAP_TUNER)         ) printf("TUNER ");
 292 // if( (cap.capabilities & V4L2_CAP_AUDIO)         ) printf("AUDIO ");
 293 // if( (cap.capabilities & V4L2_CAP_RADIO)         ) printf("RADIO ");
 294 // if( (cap.capabilities & V4L2_CAP_READWRITE)     ) printf("READWRITE ");
 295 // if( (cap.capabilities & V4L2_CAP_ASYNCIO)       ) printf("ASYNCIO ");
 296 // if( (cap.capabilities & V4L2_CAP_STREAMING)     ) printf("STREAMING ");
 297 // printf("\n");
 298
 299         int config_width = video_device->in_config->w;
 300         int config_height = video_device->in_config->h;
 301         int config_area = config_width * config_height;
 302         int best_width = config_width;
 303         int best_height = config_height;
 304         unsigned int best_format = 0;
 305         int best_merit = 0;
 306         int best_color_model = -1;
 307         int best_area = INT_MAX;
 308         int driver = video_device->in_config->driver;
 309
 310         for( int i=0; i<20; ++i ) {
 311                 struct v4l2_fmtdesc fmt;
 312                 memset(&fmt,0,sizeof(fmt));
 313                 fmt.index = i;
 314                 fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 315                 if( vioctl(VIDIOC_ENUM_FMT,&fmt) != 0 ) break;
 316                 printf("DeviceV4L2Base::v4l2_open");
 317                 // printf("format=\"%s\";",&fmt.description[0]);
 318                 printf(" pixels=\"%4.4s\"; res=\"",(char*)&fmt.pixelformat);
 319
 320                 int merit = 0;
 321                 int cmodel = -1;
 322                 switch(fmt.pixelformat)
 323                 {
 324                 case V4L2_PIX_FMT_YUYV:    cmodel = BC_YUV422;  merit = 4;  break;
 325                 case V4L2_PIX_FMT_UYVY:    cmodel = BC_UVY422;  merit = 4;  break;
 326                 case V4L2_PIX_FMT_Y41P:    cmodel = BC_YUV411P; merit = 1;  break;
 327                 case V4L2_PIX_FMT_YVU420:  cmodel = BC_YUV420P; merit = 3;  break;
 328                 case V4L2_PIX_FMT_YUV422P: cmodel = BC_YUV422P; merit = 4;  break;
 329                 case V4L2_PIX_FMT_RGB24:   cmodel = BC_RGB888;  merit = 6;  break;
 330                 case V4L2_PIX_FMT_MJPEG:
 331                         cmodel = BC_COMPRESSED;
 332                         merit = driver == VIDEO4LINUX2JPEG ||
 333                                 driver == CAPTURE_JPEG_WEBCAM ? 7 : 0;
 334                         break;
 335                 case V4L2_PIX_FMT_MPEG:
 336                         cmodel = BC_YUV420P;
 337                         merit = driver == VIDEO4LINUX2MPEG ? 7 : 2;
 338                         break;
 339                 }
 340                 if( cmodel >= 0 && merit > best_merit )
 341                 {
 342                         best_merit = merit;
 343                         best_format = fmt.pixelformat;
 344                         best_color_model = cmodel;
 345                 }
 346
 347                 for( int n=0; n<20; ++n ) {
 348                         struct v4l2_frmsizeenum fsz;
 349                         memset(&fsz,0,sizeof(fsz));
 350                         fsz.index = n;
 351                         fsz.pixel_format = fmt.pixelformat;
 352                         if( vioctl(VIDIOC_ENUM_FRAMESIZES,&fsz) != 0 ) break;
 353                         int w = fsz.discrete.width, h = fsz.discrete.height;
 354                         if( n > 0 ) printf(" ");
 355                         printf("%dx%d",w,h);
 356                         int area = w * h;
 357                         if( area > config_area ) continue;
 358                         int diff = abs(area-config_area);
 359                         if( diff < best_area ) {
 360                                 best_area = diff;
 361                                 best_width = w;
 362                                 best_height = h;
 363                         }
 364                 }
 365                 printf("\"\n");
 366         }
 367
 368         if( !best_format )
 369         {
 370                 printf("DeviceV4L2Base::v4l2_open cant determine best_format\n");
 371                 switch(driver)
 372                 {
 373                 case VIDEO4LINUX2JPEG:
 374                         best_format = V4L2_PIX_FMT_MJPEG;
 375                         break;
 376                 case VIDEO4LINUX2MPEG:
 377                         best_format = V4L2_PIX_FMT_MPEG;
 378                         break;
 379                 default:
 380                         best_color_model = color_model;
 381                         best_format = cmodel_to_device(color_model);
 382                         break;
 383                 }
 384                 printf("DeviceV4L2Base::v4l2_open ");
 385                 printf(_(" attempting format %4.4s\n"),
 386                         (char *)&best_format);
 387         }
 388         if(driver == VIDEO4LINUX2JPEG && best_format != V4L2_PIX_FMT_MJPEG)
 389         {
 390                 printf("DeviceV4L2Base::v4l2_open ");
 391                 printf(_("jpeg driver and best_format not mjpeg (%4.4s)\n"),
 392                         (char *)&best_format);
 393                 return 1;
 394         }
 395         if(driver == VIDEO4LINUX2MPEG && best_format != V4L2_PIX_FMT_MPEG)
 396         {
 397                 printf("DeviceV4L2Base::v4l2_open ");
 398                 printf(_("mpeg driver and best_format not mpeg (%4.4s)\n"),
 399                         (char *)&best_format);
 400                 return 1;
 401         }
 402         if(config_width != best_width || config_height != best_height)
 403         {
 404                 printf("DeviceV4L2Base::v4l2_open ");
 405                 printf(_("config geom %dx%d != %dx%d best_geom\n"),
 406                         config_width, config_height, best_width, best_height);
 407         }
 408
 409 // Set up frame rate
 410         struct v4l2_streamparm v4l2_parm;
 411         memset(&v4l2_parm, 0, sizeof(v4l2_parm));
 412         v4l2_parm.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 413         if(vioctl(VIDIOC_G_PARM, &v4l2_parm) < 0)
 414                 perror("DeviceV4L2Base::v4l2_open VIDIOC_G_PARM");
 415         if(v4l2_parm.parm.capture.capability & V4L2_CAP_TIMEPERFRAME)
 416         {
 417                 v4l2_parm.parm.capture.capturemode |= V4L2_CAP_TIMEPERFRAME;
 418                 v4l2_parm.parm.capture.timeperframe.numerator = 1;
 419                 v4l2_parm.parm.capture.timeperframe.denominator =
 420                         (unsigned long)((float)1 /
 421                         video_device->frame_rate * 10000000);
 422                 if(vioctl(VIDIOC_S_PARM, &v4l2_parm) < 0)
 423                         perror("DeviceV4L2Base::v4l2_open VIDIOC_S_PARM");
 424
 425                 if(vioctl(VIDIOC_G_PARM, &v4l2_parm) < 0)
 426                         perror("DeviceV4L2Base::v4l2_open VIDIOC_G_PARM");
 427         }
 428
 429         printf("v4l2 s_fmt %dx%d %4.4s\n", best_width, best_height, (char*)&best_format);
 430 // Set up data format
 431         struct v4l2_format v4l2_params;
 432         memset(&v4l2_params, 0, sizeof(v4l2_params));
 433         v4l2_params.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 434         if(vioctl(VIDIOC_G_FMT, &v4l2_params) < 0)
 435                 perror("DeviceV4L2Base::v4l2_open VIDIOC_G_FMT 1");
 436         v4l2_params.fmt.pix.width = best_width;
 437         v4l2_params.fmt.pix.height = best_height;
 438         v4l2_params.fmt.pix.pixelformat = best_format;
 439         if(vioctl(VIDIOC_S_FMT, &v4l2_params) < 0)
 440                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_FMT");
 441         memset(&v4l2_params, 0, sizeof(v4l2_params));
 442         v4l2_params.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 443         if(vioctl(VIDIOC_G_FMT, &v4l2_params) < 0)
 444                 perror("DeviceV4L2Base::v4l2_open VIDIOC_G_FMT 2");
 445         if( v4l2_params.fmt.pix.pixelformat != best_format )
 446         {
 447                 printf("DeviceV4L2Base::v4l2_open  set format %4.4s != %4.4s best_format\n",
 448                          (char*)&v4l2_params.fmt.pix.pixelformat, (char*)&best_format);
 449                 return 1;
 450         }
 451         iwidth = v4l2_params.fmt.pix.width;
 452         iheight = v4l2_params.fmt.pix.height;
 453         if( iwidth != best_width || iheight != best_height )
 454         {
 455                 printf("DeviceV4L2Base::v4l2_open  set geom %dx%d != %dx%d best_geom\n",
 456                         iwidth, iheight, best_width, best_height);
 457                 return 1;
 458         }
 459
 460 // Set picture controls.  This driver requires the values to be set once to default
 461 // values and then again to different values before it takes up the values.
 462 // Unfortunately VIDIOC_S_CTRL resets the audio to mono in 2.6.7.
 463         PictureConfig *picture = video_device->picture;
 464         for(int i = 0; i < picture->controls.total; i++)
 465         {
 466                 struct v4l2_queryctrl arg;
 467                 memset(&arg, 0, sizeof(arg));
 468                 PictureItem *item = picture->controls.values[i];
 469                 arg.id = item->device_id;
 470                 if(!vioctl(VIDIOC_QUERYCTRL, &arg))
 471                 {
 472                         struct v4l2_control ctrl_arg;
 473                         memset(&ctrl_arg, 0, sizeof(ctrl_arg));
 474                         ctrl_arg.id = item->device_id;
 475                         ctrl_arg.value = 0;
 476                         if(vioctl(VIDIOC_S_CTRL, &ctrl_arg) < 0)
 477                                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_CTRL");
 478                 }
 479                 else
 480                 {
 481                         printf("DeviceV4L2Base::v4l2_open VIDIOC_S_CTRL 1 %s/id %08x failed\n",
 482                                 item->name, item->device_id);
 483                 }
 484         }
 485
 486
 487         for(int i = 0; i < picture->controls.total; i++)
 488         {
 489                 struct v4l2_queryctrl arg;
 490                 memset(&arg, 0, sizeof(arg));
 491                 PictureItem *item = picture->controls.values[i];
 492                 arg.id = item->device_id;
 493
 494                 if(!vioctl(VIDIOC_QUERYCTRL, &arg))
 495                 {
 496                         struct v4l2_control ctrl_arg;
 497                         memset(&ctrl_arg, 0, sizeof(ctrl_arg));
 498                         ctrl_arg.id = item->device_id;
 499                         ctrl_arg.value = item->value;
 500                         if(vioctl(VIDIOC_S_CTRL, &ctrl_arg) < 0)
 501                                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_CTRL");
 502                 }
 503                 else
 504                 {
 505                         printf("DeviceV4L2Base::v4l2_open VIDIOC_S_CTRL 2 %s/id %08x failed\n",
 506                                 item->name, item->device_id);
 507                 }
 508         }
 509
 510
 511 // Set input
 512         Channel *video_channel = video_device->channel;
 513         ArrayList<Channel*> *inputs = video_device->get_inputs();
 514         int input = video_channel->input;
 515         device_channel = input >= 0 && input < inputs->total ?
 516                 inputs->values[input] : 0;
 517         if(!device_channel)
 518         {
 519 // Try first input
 520                 if(inputs->total)
 521                 {
 522                         device_channel = inputs->values[0];
 523                         printf("DeviceV4L2Base::v4l2_open user channel not found.  Using %s\n",
 524                                 device_channel->device_name);
 525                 }
 526                 else
 527                 {
 528                         printf("DeviceV4L2Base::v4l2_open channel \"%s\" not found.\n",
 529                                 video_channel->title);
 530                 }
 531         }
 532
 533 // Translate input to API structures
 534         input = device_channel ? device_channel->device_index : 0;
 535         if(vioctl(VIDIOC_S_INPUT, &input) < 0)
 536                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_INPUT");
 537
 538 // Set norm
 539         v4l2_std_id std_id = 0;
 540         switch(video_channel->norm)
 541         {
 542                 case NTSC: std_id = V4L2_STD_NTSC; break;
 543                 case PAL: std_id = V4L2_STD_PAL; break;
 544                 case SECAM: std_id = V4L2_STD_SECAM; break;
 545                 default: std_id = V4L2_STD_NTSC_M; break;
 546         }
 547         if(vioctl(VIDIOC_S_STD, &std_id))
 548                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_STD");
 549
 550         int dev_tuner = device_channel ? device_channel->tuner : -1;
 551         if( (cap.capabilities & V4L2_CAP_TUNER) && dev_tuner >= 0 )
 552         {
 553                 struct v4l2_tuner tuner;
 554                 memset(&tuner, 0, sizeof(tuner));
 555                 tuner.index = dev_tuner;
 556                 if(!vioctl(VIDIOC_G_TUNER, &tuner))
 557                 {
 558 // printf("DeviceV4L2Base::v4l2_open audmode=%d rxsubchans=%d\n",
 559 //   tuner.audmode, tuner.rxsubchans);
 560                         tuner.index = dev_tuner;
 561                         tuner.type = V4L2_TUNER_ANALOG_TV;
 562                         tuner.audmode = V4L2_TUNER_MODE_STEREO;
 563                         tuner.rxsubchans = V4L2_TUNER_SUB_STEREO;
 564                         if(vioctl(VIDIOC_S_TUNER, &tuner) < 0)
 565                                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_TUNER");
 566 // Set frequency
 567                         struct v4l2_frequency frequency;
 568                         memset(&frequency, 0, sizeof(frequency));
 569                         frequency.tuner = video_channel->tuner;
 570                         frequency.type = V4L2_TUNER_ANALOG_TV;
 571                         int table = video_channel->freqtable;
 572                         int entry = video_channel->entry;
 573                         frequency.frequency = (int)(chanlists[table].list[entry].freq * 0.016);
 574 // printf("DeviceV4L2Base::v4l2_open tuner=%d freq=%d norm=%d\n",
 575 //   video_channel->tuner, frequency.frequency, video_channel->norm);
 576                         if(vioctl(VIDIOC_S_FREQUENCY, &frequency) < 0)
 577                                 perror("DeviceV4L2Base::v4l2_open VIDIOC_S_FREQUENCY");
 578                 }
 579                 else
 580                         perror("DeviceV4L2Base::v4l2_open VIDIOC_G_TUNER");
 581         }
 582
 583 // Set compression
 584         if(color_model == BC_COMPRESSED)
 585         {
 586                 struct v4l2_jpegcompression jpeg_arg;
 587                 memset(&jpeg_arg, 0, sizeof(jpeg_arg));
 588                 if(vioctl(VIDIOC_G_JPEGCOMP, &jpeg_arg) < 0)
 589                         perror("DeviceV4L2Base::v4l2_open VIDIOC_G_JPEGCOMP");
 590                 jpeg_arg.quality = video_device->quality / 2;
 591                 if(vioctl(VIDIOC_S_JPEGCOMP, &jpeg_arg) < 0)
 592                         perror("DeviceV4L2Base::v4l2_open VIDIOC_S_JPEGCOMP");
 593         }
 594
 595         this->color_model = best_color_model;
 596         return 0;
 597 }
 598
 599 int DeviceV4L2Base::v4l2_status()
 600 {
 601         int result = 1;
 602         Channel *channel = device_channel;
 603         if( !channel )
 604         {
 605                 dev_status = 0;
 606         }
 607         else if( channel->tuner >= 0 )
 608         {
 609                 struct v4l2_tuner tuner;
 610                 memset(&tuner,0,sizeof(tuner));
 611                 tuner.index = channel->tuner;
 612                 if( !vioctl(VIDIOC_G_TUNER, &tuner) )
 613                 {
 614                         dev_status = tuner.signal ? 1 : 0;
 615                         result = 0;
 616                 }
 617                 else
 618                         perror("DeviceV4L2Base::v4l2_status VIDIOC_S_TUNER");
 619         }
 620         else
 621         {
 622                 struct v4l2_input arg;
 623                 memset(&arg, 0, sizeof(arg));
 624                 arg.index = channel->device_index;
 625                 if( !vioctl(VIDIOC_ENUMINPUT, &arg) )
 626                 {
 627                         dev_status = (arg.status &
 628                         (V4L2_IN_ST_NO_POWER | V4L2_IN_ST_NO_SIGNAL)) ? 0 : 1;
 629                         result = 0;
 630                 }
 631                 else
 632                         perror("DeviceV4L2Base::v4l2_status VIDIOC_ENUMINPUT");
 633         }
 634         return result;
 635 }
 636
 637 void DeviceV4L2Base::dev_close()
 638 {
 639         if( dev_fd >= 0 )
 640         {
 641                 ::close(dev_fd);
 642                 dev_fd = -1;
 643         }
 644 }
 645
 646 int DeviceV4L2Base::dev_open()
 647 {
 648         if( dev_fd < 0 )
 649         {
 650                 VideoDevice *video_device = v4l2_device();
 651                 if( !video_device )
 652                 {
 653                         printf("DeviceV4L2Base::dev_open: video_device not available\n");
 654                         Timer::delay(250);
 655                         return -1;
 656                 }
 657                 const char *dev_path = video_device->in_config->get_path();
 658                 dev_fd = open(dev_path, O_RDWR);
 659                 if( dev_fd < 0 )
 660                 {
 661                         perror("DeviceV4L2Base::dev_open: open_failed");
 662                         printf("DeviceV4L2Base::dev_open: dev_path %s\n", dev_path);
 663                         return 1;
 664                 }
 665                 video_device->set_cloexec_flag(dev_fd, 1);
 666         }
 667         return 0;
 668 }
 669
 670
 671 int DeviceV4L2Base::open_dev(int color_model)
 672 {
 673         v4l2_lock->lock("DeviceV4L2Base::open_dev");
 674         int result = 0;
 675         if( !opened )
 676         {
 677                 result = dev_open();
 678                 if( !result )
 679                         result = v4l2_open(color_model);
 680                 if( !result )
 681                         result = start_dev();
 682                 if( !result )
 683                 {
 684                         qbfrs_lock->reset();
 685                         video_lock->reset();
 686                         getq = new DeviceV4L2BufferQ(total_buffers+1);
 687                         put_thread = new DeviceV4L2Put(this);
 688                         put_thread->start();
 689                         done = 0;
 690                         Thread::start();
 691                 }
 692                 else
 693                         printf("DeviceV4L2Base::open_dev failed\n");
 694         }
 695         if( result )
 696         {
 697                 printf("DeviceV4L2Base::open_dev: adaptor open failed\n");
 698                 stop_dev();
 699                 dev_close();
 700         }
 701         else
 702                 opened = 1;
 703         v4l2_lock->unlock();
 704         return result;
 705 }
 706
 707 void DeviceV4L2Base::close_dev()
 708 {
 709         v4l2_lock->lock("DeviceV4L2Base::close_dev");
 710         if( opened )
 711         {
 712                 if(Thread::running())
 713                 {
 714                         done = 1;
 715                         Thread::cancel();
 716                 }
 717                 Thread::join();
 718                 if(put_thread)
 719                 {
 720                         delete put_thread;
 721                         put_thread = 0;
 722                 }
 723                 stop_dev();
 724                 dev_close();
 725                 delete getq;
 726                 getq = 0;
 727                 opened = 0;
 728         }
 729         v4l2_lock->unlock();
 730 }
 731
 732 int DeviceV4L2Base::status_dev()
 733 {
 734         v4l2_lock->lock("DeviceV4L2Base::status_dev");
 735         int result = dev_fd >= 0 ? v4l2_status() : 1;
 736         v4l2_lock->unlock();
 737         return result;
 738 }
 739
 740 unsigned int DeviceV4L2Base::cmodel_to_device(int color_model)
 741 {
 742         switch(color_model)
 743         {
 744         case BC_COMPRESSED:     return V4L2_PIX_FMT_MJPEG;
 745         case BC_YUV422:         return V4L2_PIX_FMT_YUYV;
 746         case BC_UVY422:         return V4L2_PIX_FMT_UYVY;
 747         case BC_YUV411P:        return V4L2_PIX_FMT_Y41P;
 748         case BC_YUV420P:        return V4L2_PIX_FMT_YVU420;
 749         case BC_YUV422P:        return V4L2_PIX_FMT_YUV422P;
 750         case BC_RGB888:         return V4L2_PIX_FMT_RGB24;
 751         }
 752         return 0;
 753 }
 754
 755 DeviceV4L2VFrame::DeviceV4L2VFrame(int dev_fd, unsigned long ofs, unsigned long sz)
 756 {
 757         dev_data = (unsigned char*)mmap(NULL, dev_size=sz,
 758                 PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, ofs);
 759         if(dev_data == MAP_FAILED) {
 760                 perror("DeviceV4L2VFrame::DeviceV4L2VFrame: mmap");
 761                 dev_data = 0;
 762         }
 763 }
 764
 765
 766 DeviceV4L2VFrame::~DeviceV4L2VFrame()
 767 {
 768         munmap(dev_data, dev_size);
 769 }
 770
 771 int DeviceV4L2Base::start_dev()
 772 {
 773         VideoDevice *video_device = v4l2_device();
 774         if( !video_device ) return 1;
 775
 776 // Errors here are fatal.
 777         int req_buffers = video_device->in_config->capture_length;
 778         req_buffers = MAX(req_buffers, 2);
 779         req_buffers = MIN(req_buffers, 0xff);
 780
 781         struct v4l2_requestbuffers requestbuffers;
 782         memset(&requestbuffers, 0, sizeof(requestbuffers));
 783 //printf("DeviceV4L2Base::start_dev requested %d buffers\n", req_buffers);
 784         requestbuffers.count = req_buffers;
 785         requestbuffers.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 786         requestbuffers.memory = V4L2_MEMORY_MMAP;
 787         if(vioctl(VIDIOC_REQBUFS, &requestbuffers) < 0)
 788         {
 789                 perror("DeviceV4L2Base::start_dev VIDIOC_REQBUFS");
 790                 return 1;
 791         }
 792         int bfr_count = requestbuffers.count;
 793 //printf("DeviceV4L2Base::start_dev got %d buffers\n", bfr_count);
 794         device_buffers = new DeviceV4L2VFrame *[bfr_count];
 795         memset(device_buffers, 0, bfr_count*sizeof(device_buffers[0]));
 796
 797 //printf("DeviceV4L2Base::start_dev color_model=%d\n", color_model);
 798         int y_offset = 0, line_size = -1;
 799         int u_offset = 0, v_offset = 0;
 800
 801         if(color_model != BC_COMPRESSED)
 802         {
 803                 switch(color_model)
 804                 {
 805                 case BC_YUV422P:
 806                         u_offset = iwidth * iheight;
 807                         v_offset = u_offset + u_offset / 2;
 808                         break;
 809                 case BC_YUV420P:
 810                 case BC_YUV411P:
 811 // In 2.6.7, the v and u are inverted for 420 but not 422
 812                         v_offset = iwidth * iheight;
 813                         u_offset = v_offset + v_offset / 4;
 814                         break;
 815                 }
 816         }
 817
 818         total_buffers = 0;
 819         for(int i = 0; i < bfr_count; i++)
 820         {
 821                 struct v4l2_buffer buffer;
 822                 memset(&buffer, 0, sizeof(buffer));
 823                 buffer.type = requestbuffers.type;
 824                 buffer.index = i;
 825                 if(vioctl(VIDIOC_QUERYBUF, &buffer) < 0)
 826                 {
 827                         perror("DeviceV4L2Base::start_dev VIDIOC_QUERYBUF");
 828                         continue;
 829                 }
 830
 831                 DeviceV4L2VFrame *dframe =
 832                         new DeviceV4L2VFrame(dev_fd, buffer.m.offset, buffer.length);
 833                 unsigned char *data = dframe->get_dev_data();
 834                 if( !data ) continue;
 835                 device_buffers[total_buffers++] = dframe;
 836                 if(color_model != BC_COMPRESSED)
 837                         dframe->reallocate(data, 0, y_offset, u_offset, v_offset,
 838                                 iwidth, iheight, color_model, line_size);
 839                 else
 840                         dframe->set_compressed_memory(data, 0, 0, dframe->get_dev_size());
 841         }
 842
 843         q_bfrs = 0;
 844         for(int i = 0; i < total_buffers; i++)
 845         {
 846                 struct v4l2_buffer buffer;
 847                 memset(&buffer, 0, sizeof(buffer));
 848                 buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 849                 buffer.memory = V4L2_MEMORY_MMAP;
 850                 buffer.index = i;
 851
 852                 if(vioctl(VIDIOC_QBUF, &buffer) < 0)
 853                 {
 854                         perror("DeviceV4L2Base::start_dev VIDIOC_QBUF");
 855                         continue;
 856                 }
 857                 ++q_bfrs;
 858         }
 859
 860         int streamon_arg = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 861         if(vioctl(VIDIOC_STREAMON, &streamon_arg) < 0)
 862         {
 863                 perror("DeviceV4L2Base::start_dev VIDIOC_STREAMON");
 864                 return 1;
 865         }
 866
 867         streamon = 1;
 868         return 0;
 869 }
 870
 871 int DeviceV4L2Base::stop_dev()
 872 {
 873         if( streamon )
 874         {
 875                 int streamoff_arg = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 876                 if(vioctl(VIDIOC_STREAMOFF, &streamoff_arg) < 0)
 877                         perror("DeviceV4L2Base::stop_stream_capture VIDIOC_STREAMOFF");
 878                 streamon = 0;
 879         }
 880
 881         for( int i = 0; i < total_buffers; i++ )
 882         {
 883                 delete device_buffers[i];
 884         }
 885
 886         struct v4l2_requestbuffers requestbuffers;
 887         memset(&requestbuffers, 0, sizeof(requestbuffers));
 888         requestbuffers.count = 0;
 889         requestbuffers.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 890         requestbuffers.memory = V4L2_MEMORY_MMAP;
 891         vioctl(VIDIOC_REQBUFS, &requestbuffers);
 892
 893         delete [] device_buffers;
 894         device_buffers = 0;
 895         total_buffers = 0;
 896         return 0;
 897 }
 898
 899
 900 void DeviceV4L2Base::run()
 901 {
 902         Thread::disable_cancel();
 903         int min_buffers = total_buffers / 2;
 904         if( min_buffers > 3 ) min_buffers = 3;
 905
 906 // Read buffers continuously
 907         while( !done )
 908         {
 909                 int retry = 0;
 910                 int qbfrs = q_bfrs;
 911                 while( !done && (!qbfrs || (!retry && qbfrs < min_buffers)) )
 912                 {
 913                         Thread::enable_cancel();
 914                         Timer::delay(10);
 915                         Thread::disable_cancel();
 916                         ++retry;  qbfrs = q_bfrs;
 917                 }
 918                 if( done ) break;
 919                 struct v4l2_buffer buffer;
 920                 memset(&buffer, 0, sizeof(buffer));
 921                 buffer.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 922                 buffer.memory = V4L2_MEMORY_MMAP;
 923
 924 // The driver returns the first buffer not queued, so only one buffer
 925 // can be unqueued at a time.
 926                 Thread::enable_cancel();
 927                 qbfrs_lock->lock("DeviceV4L2Base::run");
 928                 int result = vioctl(VIDIOC_DQBUF, &buffer);
 929                 if( !result ) --q_bfrs;
 930                 qbfrs_lock->unlock();
 931                 Thread::disable_cancel();
 932                 if(result < 0)
 933                 {
 934                         perror("DeviceV4L2Base::run VIDIOC_DQBUF");
 935                         Thread::enable_cancel();
 936                         Timer::delay(10);
 937                         Thread::disable_cancel();
 938                         continue;
 939                 }
 940
 941 // Get output frame
 942                 int bfr = buffer.index;
 943 // Set output frame data size/time, queue video
 944                 VFrame *frame = device_buffers[bfr];
 945                 if(color_model == BC_COMPRESSED)
 946                         frame->set_compressed_size(buffer.bytesused);
 947                 struct timeval *tv = &buffer.timestamp;
 948                 double bfr_time = tv->tv_sec + tv->tv_usec / 1000000.;
 949                 frame->set_timestamp(bfr_time);
 950                 if( !getq->q(bfr) ) video_lock->unlock();
 951         }
 952 }
 953
 954 #endif