modules/access/pvr.c

   1 /*****************************************************************************
   2  * pvr.c
   3  *****************************************************************************
   4  * Copyright (C) 2001, 2002 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Eric Petit <titer@videolan.org>
   8  *          Paul Corke <paulc@datatote.co.uk>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_access.h>
  35 #include <vlc_fs.h>
  36 #include <vlc_url.h>
  37 #include <vlc_network.h>
  38
  39 #include <sys/types.h>
  40 #include <fcntl.h>
  41 #include <unistd.h>
  42 #include <linux/types.h>
  43 #include <sys/ioctl.h>
  44 #if defined(HAVE_LINUX_VIDEODEV2_H)
  45 #   include <linux/videodev2.h>
  46 #elif defined(HAVE_SYS_VIDEOIO_H)
  47 #   include <sys/videoio.h>
  48 #else
  49 #   error "No Video4Linux2 headers found."
  50 #endif
  51
  52 /*****************************************************************************
  53  * Module descriptor
  54  *****************************************************************************/
  55 static int  Open ( vlc_object_t * );
  56 static void Close( vlc_object_t * );
  57
  58 #define DEVICE_TEXT N_( "Device" )
  59 #define DEVICE_LONGTEXT N_( "PVR video device" )
  60
  61 #define RADIO_DEVICE_TEXT N_( "Radio device" )
  62 #define RADIO_DEVICE_LONGTEXT N_( "PVR radio device" )
  63
  64 #define NORM_TEXT N_( "Norm" )
  65 #define NORM_LONGTEXT N_( "Norm of the stream " \
  66     "(Automatic, SECAM, PAL, or NTSC)." )
  67
  68 #define WIDTH_TEXT N_( "Width" )
  69 #define WIDTH_LONGTEXT N_( "Width of the stream to capture " \
  70     "(-1 for autodetection)." )
  71
  72 #define HEIGHT_TEXT N_( "Height" )
  73 #define HEIGHT_LONGTEXT N_( "Height of the stream to capture " \
  74     "(-1 for autodetection)." )
  75
  76 #define FREQUENCY_TEXT N_( "Frequency" )
  77 #define FREQUENCY_LONGTEXT N_( "Frequency to capture (in kHz), if applicable." )
  78
  79 #define FRAMERATE_TEXT N_( "Framerate" )
  80 #define FRAMERATE_LONGTEXT N_( "Framerate to capture, if applicable " \
  81     "(-1 for autodetect)." )
  82
  83 #define KEYINT_TEXT N_( "Key interval" )
  84 #define KEYINT_LONGTEXT N_( "Interval between keyframes (-1 for autodetect)." )
  85
  86 #define BFRAMES_TEXT N_( "B Frames" )
  87 #define BFRAMES_LONGTEXT N_("If this option is set, B-Frames will be used. " \
  88     "Use this option to set the number of B-Frames.")
  89
  90 #define BITRATE_TEXT N_( "Bitrate" )
  91 #define BITRATE_LONGTEXT N_( "Bitrate to use (-1 for default)." )
  92
  93 #define BITRATE_PEAK_TEXT N_( "Bitrate peak" )
  94 #define BITRATE_PEAK_LONGTEXT N_( "Peak bitrate in VBR mode." )
  95
  96 #define BITRATE_MODE_TEXT N_( "Bitrate mode" )
  97 #define BITRATE_MODE_LONGTEXT N_( "Bitrate mode to use (VBR or CBR)." )
  98
  99 #define BITMASK_TEXT N_( "Audio bitmask" )
 100 #define BITMASK_LONGTEXT N_("Bitmask that will "\
 101     "get used by the audio part of the card." )
 102
 103 #define VOLUME_TEXT N_( "Volume" )
 104 #define VOLUME_LONGTEXT N_("Audio volume (0-65535)." )
 105
 106 #define CHAN_TEXT N_( "Channel" )
 107 #define CHAN_LONGTEXT N_( "Channel of the card to use (Usually, 0 = tuner, " \
 108     "1 = composite, 2 = svideo)" )
 109
 110 static const int i_norm_list[] =
 111     { V4L2_STD_UNKNOWN, V4L2_STD_SECAM, V4L2_STD_PAL, V4L2_STD_NTSC };
 112 static const char *const psz_norm_list_text[] =
 113     { N_("Automatic"), N_("SECAM"), N_("PAL"),  N_("NTSC") };
 114
 115 static const int i_bitrates[] = { 0, 1 };
 116 static const char *const psz_bitrates_list_text[] = { N_("vbr"), N_("cbr") };
 117
 118 static const int pi_radio_range[2] = { 65000, 108000 };
 119
 120 vlc_module_begin ()
 121     set_shortname( N_("PVR") )
 122     set_description( N_("IVTV MPEG Encoding cards input") )
 123     set_category( CAT_INPUT )
 124     set_subcategory( SUBCAT_INPUT_ACCESS )
 125     set_capability( "access", 0 )
 126     add_shortcut( "pvr" )
 127
 128     add_string( "pvr-device", "/dev/video0", DEVICE_TEXT,
 129                  DEVICE_LONGTEXT, false )
 130     add_string( "pvr-radio-device", "/dev/radio0", RADIO_DEVICE_TEXT,
 131                  RADIO_DEVICE_LONGTEXT, false )
 132     add_integer( "pvr-norm", V4L2_STD_UNKNOWN , NORM_TEXT,
 133                  NORM_LONGTEXT, false )
 134        change_integer_list( i_norm_list, psz_norm_list_text )
 135     add_integer( "pvr-width", -1, WIDTH_TEXT, WIDTH_LONGTEXT, true )
 136     add_integer( "pvr-height", -1, HEIGHT_TEXT, HEIGHT_LONGTEXT,
 137                  true )
 138     add_integer( "pvr-frequency", -1, FREQUENCY_TEXT, FREQUENCY_LONGTEXT,
 139                  false )
 140     add_integer( "pvr-framerate", -1, FRAMERATE_TEXT, FRAMERATE_LONGTEXT,
 141                  true )
 142     add_integer( "pvr-keyint", -1, KEYINT_TEXT, KEYINT_LONGTEXT,
 143                  true )
 144     add_integer( "pvr-bframes", -1, FRAMERATE_TEXT, FRAMERATE_LONGTEXT,
 145                  true )
 146     add_integer( "pvr-bitrate", -1, BITRATE_TEXT, BITRATE_LONGTEXT,
 147                  false )
 148     add_integer( "pvr-bitrate-peak", -1, BITRATE_PEAK_TEXT,
 149                  BITRATE_PEAK_LONGTEXT, true )
 150     add_integer( "pvr-bitrate-mode", -1, BITRATE_MODE_TEXT,
 151                  BITRATE_MODE_LONGTEXT, true )
 152         change_integer_list( i_bitrates, psz_bitrates_list_text )
 153     add_integer( "pvr-audio-bitmask", -1, BITMASK_TEXT,
 154                  BITMASK_LONGTEXT, true )
 155     add_integer( "pvr-audio-volume", -1, VOLUME_TEXT,
 156                  VOLUME_LONGTEXT, true )
 157     add_integer( "pvr-channel", -1, CHAN_TEXT, CHAN_LONGTEXT, true )
 158
 159     set_callbacks( Open, Close )
 160 vlc_module_end ()
 161
 162 /*****************************************************************************
 163  * Prototypes
 164  *****************************************************************************/
 165 static ssize_t Read   ( access_t *, uint8_t *, size_t );
 166 static int Control( access_t *, int, va_list );
 167
 168 struct access_sys_t
 169 {
 170     /* file descriptor */
 171     int i_fd;
 172     int i_radio_fd;
 173
 174     char *psz_videodev;
 175     char *psz_radiodev;
 176
 177     /* options */
 178     int i_standard;
 179     int i_width;
 180     int i_height;
 181     int i_frequency;
 182     int i_framerate;
 183     int i_keyint;
 184     int i_bframes;
 185     int i_bitrate;
 186     int i_bitrate_peak;
 187     int i_bitrate_mode;
 188     int i_audio_bitmask;
 189     int i_input;
 190     int i_volume;
 191 };
 192
 193
 194 #define MAX_V4L2_CTRLS (6)
 195 /*****************************************************************************
 196  * AddV4L2Ctrl: adds a control to the v4l2 controls list
 197  *****************************************************************************/
 198 static void AddV4L2Ctrl( access_t * p_access,
 199                          struct v4l2_ext_controls * p_controls,
 200                          uint32_t i_id, uint32_t i_value )
 201 {
 202     if( p_controls->count >= MAX_V4L2_CTRLS )
 203     {
 204         msg_Err( p_access, "Tried to set too many v4l2 controls at once." );
 205         return;
 206     }
 207
 208     p_controls->controls[p_controls->count].id    = i_id;
 209     p_controls->controls[p_controls->count].value = i_value;
 210     p_controls->count++;
 211 }
 212
 213 /*****************************************************************************
 214  * V4L2SampleRate: calculate v4l2 sample rate from pvr-audio-bitmask
 215  *****************************************************************************/
 216 static uint32_t V4L2SampleRate( uint32_t i_bitmask )
 217 {
 218     switch( i_bitmask & 0x0003 )
 219     {
 220         case 0x0001: return V4L2_MPEG_AUDIO_SAMPLING_FREQ_48000;
 221         case 0x0002: return V4L2_MPEG_AUDIO_SAMPLING_FREQ_32000;
 222     }
 223     return V4L2_MPEG_AUDIO_SAMPLING_FREQ_44100;
 224 }
 225
 226 /*****************************************************************************
 227  * V4L2AudioEncoding: calculate v4l2 audio encoding level from pvr-audio-bitmask
 228  *****************************************************************************/
 229 static uint32_t V4L2AudioEncoding( uint32_t i_bitmask )
 230 {
 231     switch( i_bitmask & 0x000c )
 232     {
 233         case 0x0004: return V4L2_MPEG_AUDIO_ENCODING_LAYER_1;
 234         case 0x0008: return V4L2_MPEG_AUDIO_ENCODING_LAYER_2;
 235     }
 236     return 0xffffffff;
 237 }
 238
 239 /*****************************************************************************
 240  * V4L2AudioL1Bitrate: calculate v4l2 audio bitrate for layer-1 audio from pvr-audio-bitmask
 241  *****************************************************************************/
 242 static uint32_t V4L2AudioL1Bitrate( uint32_t i_bitmask )
 243 {
 244     switch( i_bitmask & 0x00f0 )
 245     {
 246         case 0x0010: return V4L2_MPEG_AUDIO_L1_BITRATE_32K;
 247         case 0x0020: return V4L2_MPEG_AUDIO_L1_BITRATE_64K;
 248         case 0x0030: return V4L2_MPEG_AUDIO_L1_BITRATE_96K;
 249         case 0x0040: return V4L2_MPEG_AUDIO_L1_BITRATE_128K;
 250         case 0x0050: return V4L2_MPEG_AUDIO_L1_BITRATE_160K;
 251         case 0x0060: return V4L2_MPEG_AUDIO_L1_BITRATE_192K;
 252         case 0x0070: return V4L2_MPEG_AUDIO_L1_BITRATE_224K;
 253         case 0x0080: return V4L2_MPEG_AUDIO_L1_BITRATE_256K;
 254         case 0x0090: return V4L2_MPEG_AUDIO_L1_BITRATE_288K;
 255         case 0x00a0: return V4L2_MPEG_AUDIO_L1_BITRATE_320K;
 256         case 0x00b0: return V4L2_MPEG_AUDIO_L1_BITRATE_352K;
 257         case 0x00c0: return V4L2_MPEG_AUDIO_L1_BITRATE_384K;
 258         case 0x00d0: return V4L2_MPEG_AUDIO_L1_BITRATE_416K;
 259         case 0x00e0: return V4L2_MPEG_AUDIO_L1_BITRATE_448K;
 260     }
 261     return V4L2_MPEG_AUDIO_L1_BITRATE_320K;
 262 }
 263
 264 /*****************************************************************************
 265  * V4L2AudioL2Bitrate: calculate v4l2 audio bitrate for layer-1 audio from pvr-audio-bitmask
 266  *****************************************************************************/
 267 static uint32_t V4L2AudioL2Bitrate( uint32_t i_bitmask )
 268 {
 269     switch( i_bitmask & 0x00f0 )
 270     {
 271         case 0x0010: return V4L2_MPEG_AUDIO_L2_BITRATE_32K;
 272         case 0x0020: return V4L2_MPEG_AUDIO_L2_BITRATE_48K;
 273         case 0x0030: return V4L2_MPEG_AUDIO_L2_BITRATE_56K;
 274         case 0x0040: return V4L2_MPEG_AUDIO_L2_BITRATE_64K;
 275         case 0x0050: return V4L2_MPEG_AUDIO_L2_BITRATE_80K;
 276         case 0x0060: return V4L2_MPEG_AUDIO_L2_BITRATE_96K;
 277         case 0x0070: return V4L2_MPEG_AUDIO_L2_BITRATE_112K;
 278         case 0x0080: return V4L2_MPEG_AUDIO_L2_BITRATE_128K;
 279         case 0x0090: return V4L2_MPEG_AUDIO_L2_BITRATE_160K;
 280         case 0x00a0: return V4L2_MPEG_AUDIO_L2_BITRATE_192K;
 281         case 0x00b0: return V4L2_MPEG_AUDIO_L2_BITRATE_224K;
 282         case 0x00c0: return V4L2_MPEG_AUDIO_L2_BITRATE_256K;
 283         case 0x00d0: return V4L2_MPEG_AUDIO_L2_BITRATE_320K;
 284         case 0x00e0: return V4L2_MPEG_AUDIO_L2_BITRATE_384K;
 285     }
 286     return V4L2_MPEG_AUDIO_L2_BITRATE_192K;
 287 }
 288
 289 /*****************************************************************************
 290  * V4L2AudioMode: calculate v4l2 audio mode from pvr-audio-bitmask
 291  *****************************************************************************/
 292 static uint32_t V4L2AudioMode( uint32_t i_bitmask )
 293 {
 294     switch( i_bitmask & 0x0300 )
 295     {
 296         case 0x0100: return V4L2_MPEG_AUDIO_MODE_JOINT_STEREO;
 297         case 0x0200: return V4L2_MPEG_AUDIO_MODE_DUAL;
 298         case 0x0300: return V4L2_MPEG_AUDIO_MODE_MONO;
 299     }
 300     return V4L2_MPEG_AUDIO_MODE_STEREO;
 301 }
 302
 303 /*****************************************************************************
 304  * ConfigureV4L2: set up codec parameters using the new v4l2 api
 305  *****************************************************************************/
 306 static int ConfigureV4L2( access_t * p_access )
 307 {
 308     access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
 309     struct v4l2_ext_controls controls;
 310     int result;
 311
 312     memset( &controls, 0, sizeof(struct v4l2_ext_controls) );
 313     controls.ctrl_class  = V4L2_CTRL_CLASS_MPEG;
 314     controls.error_idx   = 0;
 315     controls.reserved[0] = 0;
 316     controls.reserved[1] = 0;
 317     controls.count       = 0;
 318     controls.controls    = calloc( MAX_V4L2_CTRLS,
 319                                    sizeof( struct v4l2_ext_control ) );
 320
 321     if( controls.controls == NULL )
 322         return VLC_ENOMEM;
 323
 324     /* Note: Ignore frame rate.  Doesn't look like it can be changed. */
 325     if( p_sys->i_bitrate != -1 )
 326     {
 327         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE,
 328                      p_sys->i_bitrate );
 329         msg_Dbg( p_access, "Setting [%u] bitrate = %u",
 330                  controls.count - 1, p_sys->i_bitrate );
 331     }
 332
 333     if( p_sys->i_bitrate_peak != -1 )
 334     {
 335         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE_PEAK,
 336                      p_sys->i_bitrate_peak );
 337         msg_Dbg( p_access, "Setting [%u] bitrate_peak = %u",
 338                  controls.count - 1, p_sys->i_bitrate_peak );
 339     }
 340
 341     if( p_sys->i_bitrate_mode != -1 )
 342     {
 343         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_BITRATE_MODE,
 344                      p_sys->i_bitrate_mode );
 345         msg_Dbg( p_access, "Setting [%u] bitrate_mode = %u",
 346                  controls.count - 1, p_sys->i_bitrate_mode );
 347     }
 348
 349     if( p_sys->i_audio_bitmask != -1 )
 350     {
 351         /* Sample rate */
 352         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 353                     V4L2SampleRate( p_sys->i_audio_bitmask ) );
 354
 355         /* Encoding layer and bitrate */
 356         switch( V4L2AudioEncoding( p_sys->i_audio_bitmask ) )
 357         {
 358             case V4L2_MPEG_AUDIO_ENCODING_LAYER_1:
 359                  AddV4L2Ctrl( p_access, &controls,
 360                               V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 361                               V4L2_MPEG_AUDIO_ENCODING_LAYER_1 );
 362                  AddV4L2Ctrl( p_access, &controls,
 363                               V4L2_CID_MPEG_AUDIO_L1_BITRATE,
 364                               V4L2AudioL1Bitrate( p_sys->i_audio_bitmask ) );
 365                  break;
 366
 367             case V4L2_MPEG_AUDIO_ENCODING_LAYER_2:
 368                  AddV4L2Ctrl( p_access, &controls,
 369                               V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ,
 370                               V4L2_MPEG_AUDIO_ENCODING_LAYER_2 );
 371                  AddV4L2Ctrl( p_access, &controls,
 372                               V4L2_CID_MPEG_AUDIO_L2_BITRATE,
 373                               V4L2AudioL2Bitrate( p_sys->i_audio_bitmask ) );
 374                  break;
 375         }
 376
 377         /* Audio mode - stereo or mono */
 378         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_AUDIO_MODE,
 379                      V4L2AudioMode( p_sys->i_audio_bitmask ) );
 380
 381         /* See if the user wants any other audio feature */
 382         if( ( p_sys->i_audio_bitmask & 0x1ff00 ) != 0 )
 383         {
 384             /* It would be possible to support the bits that represent:
 385              *   V4L2_CID_MPEG_AUDIO_MODE_EXTENSION
 386              *   V4L2_CID_MPEG_AUDIO_EMPHASIS
 387              *   V4L2_CID_MPEG_AUDIO_CRC
 388              * but they are not currently used.  Tell the user.
 389              */
 390             msg_Err( p_access, "There were bits in pvr-audio-bitmask that were not used.");
 391         }
 392         msg_Dbg( p_access, "Setting audio controls");
 393     }
 394
 395     if( p_sys->i_keyint != -1 )
 396     {
 397         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_GOP_SIZE,
 398                      p_sys->i_keyint );
 399         msg_Dbg( p_access, "Setting [%u] keyint = %u",
 400                  controls.count - 1, p_sys->i_keyint );
 401     }
 402
 403     if( p_sys->i_bframes != -1 )
 404     {
 405         AddV4L2Ctrl( p_access, &controls, V4L2_CID_MPEG_VIDEO_B_FRAMES,
 406                      p_sys->i_bframes );
 407         msg_Dbg( p_access, "Setting [%u] bframes = %u",
 408                  controls.count - 1, p_sys->i_bframes );
 409     }
 410
 411     result = ioctl( p_sys->i_fd, VIDIOC_S_EXT_CTRLS, &controls );
 412     if( result < 0 )
 413     {
 414         msg_Err( p_access, "Failed to write %u new capture card settings.",
 415                             controls.error_idx );
 416     }
 417     free( controls.controls );
 418     return VLC_SUCCESS;
 419 }
 420
 421 /*****************************************************************************
 422  * Open: open the device
 423  *****************************************************************************/
 424 static int Open( vlc_object_t * p_this )
 425 {
 426     access_t *p_access = (access_t*) p_this;
 427     access_sys_t * p_sys;
 428     char * psz_tofree;
 429     char * psz_parser;
 430     struct v4l2_capability device_capability;
 431     int result;
 432
 433     memset( &device_capability, 0, sizeof(struct v4l2_capability) );
 434
 435     access_InitFields( p_access );
 436     ACCESS_SET_CALLBACKS( Read, NULL, Control, NULL );
 437     p_sys = p_access->p_sys = calloc( 1, sizeof( access_sys_t ));
 438     if( !p_sys ) return VLC_ENOMEM;
 439
 440     /* defaults values */
 441     p_sys->psz_videodev = var_InheritString( p_access, "pvr-device" );
 442     p_sys->psz_radiodev = var_InheritString( p_access, "pvr-radio-device" );
 443     p_sys->i_standard   = var_InheritInteger( p_access, "pvr-norm" );
 444     p_sys->i_width      = var_InheritInteger( p_access, "pvr-width" );
 445     p_sys->i_height     = var_InheritInteger( p_access, "pvr-height" );
 446     p_sys->i_frequency  = var_InheritInteger( p_access, "pvr-frequency" );
 447     p_sys->i_framerate  = var_InheritInteger( p_access, "pvr-framerate" );
 448     p_sys->i_keyint     = var_InheritInteger( p_access, "pvr-keyint" );
 449     p_sys->i_bframes    = var_InheritInteger( p_access, "pvr-bframes" );
 450     p_sys->i_bitrate    = var_InheritInteger( p_access, "pvr-bitrate" );
 451     p_sys->i_bitrate_peak  = var_InheritInteger( p_access, "pvr-bitrate-peak" );
 452     p_sys->i_bitrate_mode  = var_InheritInteger( p_access, "pvr-bitrate-mode" );
 453     p_sys->i_audio_bitmask = var_InheritInteger( p_access, "pvr-audio-bitmask" );
 454     p_sys->i_volume     = var_InheritInteger( p_access, "pvr-audio-volume" );
 455     p_sys->i_input      = var_InheritInteger( p_access, "pvr-channel" );
 456
 457     /* parse command line options */
 458     psz_tofree = strdup( p_access->psz_location );
 459     if( !psz_tofree )
 460     {
 461         free( p_sys->psz_radiodev );
 462         free( p_sys->psz_videodev );
 463         free( p_sys );
 464         return VLC_ENOMEM;
 465     }
 466
 467     psz_parser = psz_tofree;
 468     while( *psz_parser )
 469     {
 470         /* Leading slash -> device path */
 471         if( *psz_parser == '/' )
 472         {
 473             free( p_sys->psz_videodev );
 474             p_sys->psz_videodev = decode_URI_duplicate( psz_parser );
 475             break;
 476         }
 477
 478         /* Extract option name */
 479         const char *optname = psz_parser;
 480         psz_parser = strchr( psz_parser, '=' );
 481         if( psz_parser == NULL )
 482             break;
 483         *psz_parser++ = '\0';
 484
 485         /* Extract option value */
 486         char *optval = psz_parser;
 487         while( memchr( ":,", *psz_parser, 3 /* includes \0 */ ) == NULL )
 488             psz_parser++;
 489         if( *psz_parser ) /* more options to come */
 490             *psz_parser++ = '\0'; /* skip , or : */
 491
 492         if ( !strcmp( optname, "norm" ) )
 493         {
 494             if ( !strcmp( optval, "secam" ) )
 495                 p_sys->i_standard = V4L2_STD_SECAM;
 496             else if ( !strcmp( optval, "pal" ) )
 497                 p_sys->i_standard = V4L2_STD_PAL;
 498             else if ( !strcmp( optval, "ntsc" ) )
 499                 p_sys->i_standard = V4L2_STD_NTSC;
 500             else
 501                 p_sys->i_standard = atoi( optval );
 502         }
 503         else if( !strcmp( optname, "channel" ) )
 504             p_sys->i_input = atoi( optval );
 505         else if( !strcmp( optname, "device" ) )
 506         {
 507             free( p_sys->psz_videodev );
 508             if( asprintf( &p_sys->psz_videodev, "/dev/video%s", optval ) == -1)
 509                 p_sys->psz_videodev = NULL;
 510         }
 511         else if( !strcmp( optname, "frequency" ) )
 512             p_sys->i_frequency = atoi( optval );
 513         else if( !strcmp( optname, "framerate" ) )
 514             p_sys->i_framerate = atoi( optval );
 515         else if( !strcmp( optname, "keyint" ) )
 516             p_sys->i_keyint = atoi( optval );
 517         else if( !strcmp( optname, "bframes" ) )
 518             p_sys->i_bframes = atoi( optval );
 519         else if( !strcmp( optname, "width" ) )
 520             p_sys->i_width = atoi( optval );
 521         else if( !strcmp( optname, "height" ) )
 522             p_sys->i_height = atoi( optval );
 523         else if( !strcmp( optname, "audio" ) )
 524             p_sys->i_audio_bitmask = atoi( optval );
 525         else if( !strcmp( optname, "bitrate" ) )
 526             p_sys->i_bitrate = atoi( optval );
 527         else if( !strcmp( optname, "maxbitrate" ) )
 528             p_sys->i_bitrate_peak = atoi( optval );
 529         else if( !strcmp( optname, "bitratemode" ) )
 530         {
 531             if( !strcmp( optval, "vbr" ) )
 532                 p_sys->i_bitrate_mode = 0;
 533             else if( !strcmp( optval, "cbr" ) )
 534                 p_sys->i_bitrate_mode = 1;
 535         }
 536         else if( !strcmp( optname, "size" ) )
 537         {
 538             p_sys->i_width = strtol( optval, &optval, 0 );
 539             p_sys->i_height = atoi( optval );
 540         }
 541     }
 542     free( psz_tofree );
 543
 544     /* open the device */
 545     p_sys->i_fd = vlc_open( p_sys->psz_videodev, O_RDWR );
 546     if( p_sys->i_fd < 0 )
 547     {
 548         msg_Err( p_access, "Cannot open device %s (%m).",
 549                  p_sys->psz_videodev );
 550         Close( VLC_OBJECT(p_access) );
 551         return VLC_EGENERIC;
 552     }
 553     msg_Dbg( p_access, "Using video device: %s.", p_sys->psz_videodev);
 554
 555     /* See what version of ivtvdriver is running */
 556     result = ioctl( p_sys->i_fd, VIDIOC_QUERYCAP, &device_capability );
 557     if( result < 0 )
 558     {
 559         msg_Err( p_access, "unknown ivtv/pvr driver version in use" );
 560         Close( VLC_OBJECT(p_access) );
 561         return VLC_EGENERIC;
 562     }
 563
 564     msg_Dbg( p_access, "%s driver (%s on %s) version %02x.%02x.%02x",
 565               device_capability.driver,
 566               device_capability.card,
 567               device_capability.bus_info,
 568             ( device_capability.version >> 16 ) & 0xff,
 569             ( device_capability.version >>  8 ) & 0xff,
 570             ( device_capability.version       ) & 0xff);
 571
 572     /* set the input */
 573     if ( p_sys->i_input != -1 )
 574     {
 575         result = ioctl( p_sys->i_fd, VIDIOC_S_INPUT, &p_sys->i_input );
 576         if ( result < 0 )
 577             msg_Warn( p_access, "Failed to select the requested input pin." );
 578         else
 579             msg_Dbg( p_access, "input set to: %d", p_sys->i_input );
 580     }
 581
 582     /* set the video standard */
 583     if ( p_sys->i_standard != V4L2_STD_UNKNOWN )
 584     {
 585         result = ioctl( p_sys->i_fd, VIDIOC_S_STD, &p_sys->i_standard );
 586         if ( result  < 0 )
 587             msg_Warn( p_access, "Failed to set the requested video standard." );
 588         else
 589             msg_Dbg( p_access, "video standard set to: %x",
 590                      p_sys->i_standard);
 591     }
 592
 593     /* set the picture size */
 594     if ( (p_sys->i_width != -1) || (p_sys->i_height != -1) )
 595     {
 596         struct v4l2_format vfmt;
 597
 598         memset( &vfmt, 0, sizeof(struct v4l2_format) );
 599         vfmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 600
 601         result = ioctl( p_sys->i_fd, VIDIOC_G_FMT, &vfmt );
 602         if ( result < 0 )
 603         {
 604             msg_Warn( p_access, "Failed to read current picture size." );
 605         }
 606         else
 607         {
 608             if ( p_sys->i_width != -1 )
 609             {
 610                 vfmt.fmt.pix.width = p_sys->i_width;
 611             }
 612
 613             if ( p_sys->i_height != -1 )
 614             {
 615                 vfmt.fmt.pix.height = p_sys->i_height;
 616             }
 617
 618             result = ioctl( p_sys->i_fd, VIDIOC_S_FMT, &vfmt );
 619             if ( result < 0 )
 620             {
 621                 msg_Warn( p_access, "Failed to set requested picture size." );
 622             }
 623             else
 624             {
 625                 msg_Dbg( p_access, "picture size set to: %dx%d",
 626                          vfmt.fmt.pix.width, vfmt.fmt.pix.height );
 627             }
 628         }
 629     }
 630
 631     /* set the frequency */
 632     if ( p_sys->i_frequency != -1 )
 633     {
 634         int i_fd;
 635         struct v4l2_tuner vt;
 636
 637          /* TODO: let the user choose the tuner */
 638         memset( &vt, 0, sizeof(struct v4l2_tuner) );
 639
 640         if ( (p_sys->i_frequency >= pi_radio_range[0])
 641               && (p_sys->i_frequency <= pi_radio_range[1]) )
 642         {
 643             p_sys->i_radio_fd = vlc_open( p_sys->psz_radiodev, O_RDWR );
 644             if( p_sys->i_radio_fd < 0 )
 645             {
 646                 msg_Err( p_access, "Cannot open radio device (%m)." );
 647                 Close( VLC_OBJECT(p_access) );
 648                 return VLC_EGENERIC;
 649             }
 650             msg_Dbg( p_access, "using radio device: %s",
 651                      p_sys->psz_radiodev );
 652             i_fd = p_sys->i_radio_fd;
 653         }
 654         else
 655         {
 656             i_fd = p_sys->i_fd;
 657             p_sys->i_radio_fd = -1;
 658         }
 659
 660         result = ioctl( i_fd, VIDIOC_G_TUNER, &vt );
 661         if ( result < 0 )
 662         {
 663             msg_Warn( p_access, "Failed to read tuner information (%m)." );
 664         }
 665         else
 666         {
 667             struct v4l2_frequency vf;
 668
 669             memset( &vf, 0, sizeof(struct v4l2_frequency) );
 670             vf.tuner = vt.index;
 671
 672             result = ioctl( i_fd, VIDIOC_G_FREQUENCY, &vf );
 673             if ( result < 0 )
 674             {
 675                 msg_Warn( p_access, "Failed to read tuner frequency (%m)." );
 676             }
 677             else
 678             {
 679                 if( vt.capability & V4L2_TUNER_CAP_LOW )
 680                     vf.frequency = p_sys->i_frequency * 16;
 681                 else
 682                     vf.frequency = (p_sys->i_frequency * 16 + 500) / 1000;
 683
 684                 result = ioctl( i_fd, VIDIOC_S_FREQUENCY, &vf );
 685                 if( result < 0 )
 686                 {
 687                     msg_Warn( p_access, "Failed to set tuner frequency (%m)." );
 688                 }
 689                 else
 690                 {
 691                     msg_Dbg( p_access, "tuner frequency set to: %d",
 692                              p_sys->i_frequency );
 693                 }
 694             }
 695         }
 696     }
 697
 698     /* control parameters */
 699     if ( p_sys->i_volume != -1 )
 700     {
 701         struct v4l2_control ctrl;
 702
 703         memset( &ctrl, 0, sizeof(struct v4l2_control) );
 704         ctrl.id = V4L2_CID_AUDIO_VOLUME;
 705         ctrl.value = p_sys->i_volume;
 706
 707         result = ioctl( p_sys->i_fd, VIDIOC_S_CTRL, &ctrl );
 708         if ( result < 0 )
 709         {
 710             msg_Warn( p_access, "Failed to set the volume." );
 711         }
 712     }
 713
 714     /* codec parameters */
 715     if ( (p_sys->i_framerate != -1)
 716             || (p_sys->i_bitrate_mode != -1)
 717             || (p_sys->i_bitrate_peak != -1)
 718             || (p_sys->i_keyint != -1)
 719             || (p_sys->i_bframes != -1)
 720             || (p_sys->i_bitrate != -1)
 721             || (p_sys->i_audio_bitmask != -1) )
 722     {
 723         result = ConfigureV4L2( p_access );
 724         if( result != VLC_SUCCESS )
 725         {
 726             Close( VLC_OBJECT(p_access) );
 727             return result;
 728         }
 729     }
 730
 731     return VLC_SUCCESS;
 732 }
 733
 734 /*****************************************************************************
 735  * Close: close the device
 736  *****************************************************************************/
 737 static void Close( vlc_object_t * p_this )
 738 {
 739     access_t *p_access = (access_t*) p_this;
 740     access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
 741
 742     if ( p_sys->i_fd != -1 )
 743         close( p_sys->i_fd );
 744     if ( p_sys->i_radio_fd != -1 )
 745         close( p_sys->i_radio_fd );
 746     free( p_sys->psz_videodev );
 747     free( p_sys->psz_radiodev );
 748     free( p_sys );
 749 }
 750
 751 /*****************************************************************************
 752  * Read
 753  *****************************************************************************/
 754 static ssize_t Read( access_t * p_access, uint8_t * p_buffer, size_t i_len )
 755 {
 756     access_sys_t *p_sys = (access_sys_t *) p_access->p_sys;
 757     ssize_t i_ret;
 758
 759     if( p_access->info.b_eof )
 760         return 0;
 761
 762     i_ret = net_Read( p_access, p_sys->i_fd, NULL, p_buffer, i_len, false );
 763     if( i_ret == 0 )
 764     {
 765         p_access->info.b_eof = true;
 766     }
 767     else if( i_ret > 0 )
 768     {
 769         p_access->info.i_pos += i_ret;
 770     }
 771
 772     return i_ret;
 773 }
 774
 775 /*****************************************************************************
 776  * Control
 777  *****************************************************************************/
 778 static int Control( access_t *p_access, int i_query, va_list args )
 779 {
 780     bool   *pb_bool;
 781     int64_t      *pi_64;
 782
 783     switch( i_query )
 784     {
 785         /* */
 786         case ACCESS_CAN_SEEK:
 787         case ACCESS_CAN_FASTSEEK:
 788             pb_bool = (bool*)va_arg( args, bool* );
 789             *pb_bool = false;
 790             break;
 791         case ACCESS_CAN_PAUSE:
 792             pb_bool = (bool*)va_arg( args, bool* );
 793             *pb_bool = false;
 794             break;
 795         case ACCESS_CAN_CONTROL_PACE:
 796             pb_bool = (bool*)va_arg( args, bool* );
 797             *pb_bool = false;
 798             break;
 799
 800         /* */
 801         case ACCESS_GET_PTS_DELAY:
 802             pi_64 = (int64_t*)va_arg( args, int64_t * );
 803             *pi_64 = INT64_C(1000)
 804                    * var_InheritInteger( p_access, "live-caching" );
 805             break;
 806
 807         /* */
 808         case ACCESS_SET_PAUSE_STATE:
 809             /* Nothing to do */
 810             break;
 811
 812         case ACCESS_GET_TITLE_INFO:
 813         case ACCESS_SET_TITLE:
 814         case ACCESS_SET_SEEKPOINT:
 815         case ACCESS_SET_PRIVATE_ID_STATE:
 816         case ACCESS_GET_CONTENT_TYPE:
 817             return VLC_EGENERIC;
 818
 819         default:
 820             msg_Warn( p_access, "Unimplemented query in control." );
 821             return VLC_EGENERIC;
 822
 823     }
 824     return VLC_SUCCESS;
 825 }