git.sesse.net Git - vlc/blob - modules/access/cdda.c

   1 /*****************************************************************************
   2  * cdda.c : CD digital audio input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000 VideoLAN
   5  * $Id: cdda.c,v 1.3 2003/05/19 20:47:16 gbazin Exp $
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/input.h>
  33 #include <sys/types.h>
  34
  35 #include "codecs.h"
  36
  37 #ifdef HAVE_UNISTD_H
  38 #   include <unistd.h>
  39 #endif
  40
  41 #include <string.h>
  42
  43 #include "vcd/cdrom.h"
  44
  45 /* how many blocks VCDRead will read in each loop */
  46 #define CDDA_BLOCKS_ONCE 20
  47 #define CDDA_DATA_ONCE   (CDDA_BLOCKS_ONCE * CDDA_DATA_SIZE)
  48
  49 /*****************************************************************************
  50  * cdda_data_t: CD audio information
  51  *****************************************************************************/
  52 typedef struct cdda_data_s
  53 {
  54     vcddev_t    *vcddev;                            /* vcd device descriptor */
  55     int         i_nb_tracks;                        /* Nb of tracks (titles) */
  56     int         i_track;                                    /* Current track */
  57     int         i_sector;                                  /* Current Sector */
  58     int *       p_sectors;                                  /* Track sectors */
  59     vlc_bool_t  b_end_of_track;           /* If the end of track was reached */
  60
  61 } cdda_data_t;
  62
  63 struct demux_sys_t
  64 {
  65     es_descriptor_t *p_es;
  66     mtime_t         i_pts;
  67 };
  68
  69 /*****************************************************************************
  70  * Local prototypes
  71  *****************************************************************************/
  72 static int  CDDAOpen         ( vlc_object_t * );
  73 static void CDDAClose        ( vlc_object_t * );
  74 static int  CDDARead         ( input_thread_t *, byte_t *, size_t );
  75 static void CDDASeek         ( input_thread_t *, off_t );
  76 static int  CDDASetArea      ( input_thread_t *, input_area_t * );
  77 static int  CDDASetProgram   ( input_thread_t *, pgrm_descriptor_t * );
  78
  79 static int  CDDAOpenDemux    ( vlc_object_t * );
  80 static void CDDACloseDemux   ( vlc_object_t * );
  81 static int  CDDADemux        ( input_thread_t * p_input );
  82
  83 /*****************************************************************************
  84  * Module descriptior
  85  *****************************************************************************/
  86 #define CACHING_TEXT N_("Caching value in ms")
  87 #define CACHING_LONGTEXT N_( \
  88     "Allows you to modify the default caching value for cdda streams. This " \
  89     "value should be set in miliseconds units." )
  90
  91 vlc_module_begin();
  92     set_description( _("CD Audio input") );
  93     add_integer( "cdda-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
  94     set_capability( "access", 70 );
  95     set_callbacks( CDDAOpen, CDDAClose );
  96     add_shortcut( "cdda" );
  97
  98     add_submodule();
  99         set_description( _("CD Audio demux") );
 100         set_capability( "demux", 0 );
 101         set_callbacks( CDDAOpenDemux, CDDACloseDemux );
 102         add_shortcut( "cdda" );
 103 vlc_module_end();
 104
 105 /*****************************************************************************
 106  * CDDAOpen: open cdda
 107  *****************************************************************************/
 108 static int CDDAOpen( vlc_object_t *p_this )
 109 {
 110     input_thread_t *        p_input = (input_thread_t *)p_this;
 111     char *                  psz_orig;
 112     char *                  psz_parser;
 113     char *                  psz_source;
 114     cdda_data_t *           p_cdda;
 115     int                     i;
 116     input_area_t *          p_area;
 117     int                     i_title = 1;
 118     vcddev_t                *vcddev;
 119
 120 #ifdef WIN32
 121     /* On Win32 we want the CDDA access plugin to be explicitly requested,
 122      * we end up with lots of problems otherwise */
 123     if( !p_input->psz_access || !*p_input->psz_access ) return( -1 );
 124 #endif
 125
 126     /* parse the options passed in command line : */
 127     psz_orig = psz_parser = psz_source = strdup( p_input->psz_name );
 128
 129     if( !psz_orig )
 130     {
 131         return( -1 );
 132     }
 133
 134     while( *psz_parser && *psz_parser != '@' )
 135     {
 136         psz_parser++;
 137     }
 138
 139     if( *psz_parser == '@' )
 140     {
 141         /* Found options */
 142         *psz_parser = '\0';
 143         ++psz_parser;
 144
 145         i_title = (int)strtol( psz_parser, NULL, 10 );
 146         i_title = i_title ? i_title : 1;
 147     }
 148
 149     if( !*psz_source )
 150     {
 151         if( !p_input->psz_access )
 152         {
 153             free( psz_orig );
 154             return -1;
 155         }
 156         psz_source = config_GetPsz( p_input, "vcd" );
 157         if( !psz_source ) return -1;
 158     }
 159
 160     /* Open CDDA */
 161     if( !(vcddev = ioctl_Open( p_this, psz_source )) )
 162     {
 163         msg_Warn( p_input, "could not open %s", psz_source );
 164         free( psz_source );
 165         return -1;
 166     }
 167     free( psz_source );
 168
 169     p_cdda = malloc( sizeof(cdda_data_t) );
 170     if( p_cdda == NULL )
 171     {
 172         msg_Err( p_input, "out of memory" );
 173         free( psz_source );
 174         return -1;
 175     }
 176
 177     p_cdda->vcddev = vcddev;
 178     p_input->p_access_data = (void *)p_cdda;
 179
 180     p_input->i_mtu = CDDA_DATA_ONCE;
 181
 182     /* We read the Table Of Content information */
 183     p_cdda->i_nb_tracks = ioctl_GetTracksMap( VLC_OBJECT(p_input),
 184                               p_cdda->vcddev, &p_cdda->p_sectors );
 185     if( p_cdda->i_nb_tracks < 0 )
 186         msg_Err( p_input, "unable to count tracks" );
 187     else if( p_cdda->i_nb_tracks <= 0 )
 188         msg_Err( p_input, "no audio tracks found" );
 189
 190     if( p_cdda->i_nb_tracks <= 1)
 191     {
 192         ioctl_Close( p_this, p_cdda->vcddev );
 193         free( p_cdda );
 194         return -1;
 195     }
 196
 197     if( i_title >= p_cdda->i_nb_tracks || i_title < 1 )
 198         i_title = 1;
 199
 200     /* Set stream and area data */
 201     vlc_mutex_lock( &p_input->stream.stream_lock );
 202
 203     /* Initialize ES structures */
 204     input_InitStream( p_input, 0 );
 205
 206     /* cdda input method */
 207     p_input->stream.i_method = INPUT_METHOD_CDDA;
 208
 209     p_input->stream.b_pace_control = 1;
 210     p_input->stream.b_seekable = 1;
 211     p_input->stream.i_mux_rate = 44100 * 4 / 50;
 212
 213 #define area p_input->stream.pp_areas
 214     for( i = 1 ; i <= p_cdda->i_nb_tracks ; i++ )
 215     {
 216         input_AddArea( p_input, i, 1 );
 217
 218         /* Absolute start offset and size */
 219         area[i]->i_start =
 220             (off_t)p_cdda->p_sectors[i-1] * (off_t)CDDA_DATA_SIZE;
 221         area[i]->i_size =
 222             (off_t)(p_cdda->p_sectors[i] - p_cdda->p_sectors[i-1])
 223             * (off_t)CDDA_DATA_SIZE;
 224     }
 225 #undef area
 226
 227     p_area = p_input->stream.pp_areas[i_title];
 228
 229     CDDASetArea( p_input, p_area );
 230
 231     vlc_mutex_unlock( &p_input->stream.stream_lock );
 232
 233     if( !p_input->psz_demux || !*p_input->psz_demux )
 234     {
 235         p_input->psz_demux = "cdda";
 236     }
 237
 238     p_input->pf_read = CDDARead;
 239     p_input->pf_seek = CDDASeek;
 240     p_input->pf_set_area = CDDASetArea;
 241     p_input->pf_set_program = CDDASetProgram;
 242
 243     /* Update default_pts to a suitable value for cdda access */
 244     p_input->i_pts_delay = config_GetInt( p_input, "cdda-caching" ) * 1000;
 245
 246     return 0;
 247 }
 248
 249 /*****************************************************************************
 250  * CDDAClose: closes cdda
 251  *****************************************************************************/
 252 static void CDDAClose( vlc_object_t *p_this )
 253 {
 254     input_thread_t *   p_input = (input_thread_t *)p_this;
 255     cdda_data_t *p_cdda = (cdda_data_t *)p_input->p_access_data;
 256
 257     ioctl_Close( p_this, p_cdda->vcddev );
 258     free( p_cdda );
 259 }
 260
 261 /*****************************************************************************
 262  * CDDARead: reads from the CDDA into PES packets.
 263  *****************************************************************************
 264  * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
 265  * bytes.
 266  *****************************************************************************/
 267 static int CDDARead( input_thread_t * p_input, byte_t * p_buffer,
 268                      size_t i_len )
 269 {
 270     cdda_data_t *           p_cdda;
 271     int                     i_blocks;
 272     int                     i_index;
 273     int                     i_read;
 274
 275     p_cdda = (cdda_data_t *)p_input->p_access_data;
 276
 277     i_read = 0;
 278
 279     /* Compute the number of blocks we have to read */
 280
 281     i_blocks = i_len / CDDA_DATA_SIZE;
 282
 283     if ( ioctl_ReadSectors( VLC_OBJECT(p_input), p_cdda->vcddev,
 284              p_cdda->i_sector, p_buffer, i_blocks, CDDA_TYPE ) < 0 )
 285     {
 286         msg_Err( p_input, "could not read sector %d", p_cdda->i_sector );
 287         return -1;
 288     }
 289
 290     for ( i_index = 0; i_index < i_blocks; i_index++ )
 291     {
 292         p_cdda->i_sector ++;
 293         if ( p_cdda->i_sector == p_cdda->p_sectors[p_cdda->i_track + 1] )
 294         {
 295             input_area_t *p_area;
 296
 297             if ( p_cdda->i_track >= p_cdda->i_nb_tracks - 1 )
 298                 return 0; /* EOF */
 299
 300             vlc_mutex_lock( &p_input->stream.stream_lock );
 301             p_area = p_input->stream.pp_areas[
 302                     p_input->stream.p_selected_area->i_id + 1 ];
 303
 304             msg_Dbg( p_input, "new title" );
 305
 306             p_area->i_part = 1;
 307             CDDASetArea( p_input, p_area );
 308             vlc_mutex_unlock( &p_input->stream.stream_lock );
 309         }
 310         i_read += CDDA_DATA_SIZE;
 311     }
 312
 313     if ( i_len % CDDA_DATA_SIZE ) /* this should not happen */
 314     {
 315         msg_Err( p_input, "must read full sectors" );
 316     }
 317
 318     return i_read;
 319 }
 320
 321
 322 /*****************************************************************************
 323  * CDDASetProgram: Does nothing since a CDDA is mono_program
 324  *****************************************************************************/
 325 static int CDDASetProgram( input_thread_t * p_input,
 326                            pgrm_descriptor_t * p_program)
 327 {
 328     return 0;
 329 }
 330
 331
 332 /*****************************************************************************
 333  * CDDASetArea: initialize input data for title x.
 334  * It should be called for each user navigation request.
 335  ****************************************************************************/
 336 static int CDDASetArea( input_thread_t * p_input, input_area_t * p_area )
 337 {
 338     cdda_data_t *p_cdda = (cdda_data_t*)p_input->p_access_data;
 339     vlc_value_t val;
 340
 341     /* we can't use the interface slider until initilization is complete */
 342     p_input->stream.b_seekable = 0;
 343
 344     if( p_area != p_input->stream.p_selected_area )
 345     {
 346         /* Change the default area */
 347         p_input->stream.p_selected_area = p_area;
 348
 349         /* Change the current track */
 350         p_cdda->i_track = p_area->i_id - 1;
 351         p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track];
 352
 353         /* Update the navigation variables without triggering a callback */
 354         val.i_int = p_area->i_id;
 355         var_Change( p_input, "title", VLC_VAR_SETVALUE, &val, NULL );
 356     }
 357
 358     p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track];
 359
 360     p_input->stream.p_selected_area->i_tell =
 361         (off_t)p_cdda->i_sector * (off_t)CDDA_DATA_SIZE
 362          - p_input->stream.p_selected_area->i_start;
 363
 364     /* warn interface that something has changed */
 365     p_input->stream.b_seekable = 1;
 366     p_input->stream.b_changed = 1;
 367
 368     return 0;
 369 }
 370
 371
 372 /****************************************************************************
 373  * CDDASeek
 374  ****************************************************************************/
 375 static void CDDASeek( input_thread_t * p_input, off_t i_off )
 376 {
 377     cdda_data_t * p_cdda;
 378
 379     p_cdda = (cdda_data_t *) p_input->p_access_data;
 380
 381     p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track]
 382                        + i_off / (off_t)CDDA_DATA_SIZE;
 383
 384     vlc_mutex_lock( &p_input->stream.stream_lock );
 385     p_input->stream.p_selected_area->i_tell =
 386         (off_t)p_cdda->i_sector * (off_t)CDDA_DATA_SIZE
 387          - p_input->stream.p_selected_area->i_start;
 388     vlc_mutex_unlock( &p_input->stream.stream_lock );
 389 }
 390
 391 /****************************************************************************
 392  * Demux Part
 393  ****************************************************************************/
 394 static int  CDDAOpenDemux    ( vlc_object_t * p_this)
 395 {
 396     input_thread_t *p_input = (input_thread_t *)p_this;
 397     demux_sys_t    *p_demux;
 398     WAVEFORMATEX   *p_wf;
 399
 400     if( p_input->stream.i_method != INPUT_METHOD_CDDA )
 401     {
 402         return VLC_EGENERIC;
 403     }
 404
 405     p_demux = malloc( sizeof( es_descriptor_t ) );
 406     p_demux->i_pts = 0;
 407     p_demux->p_es = NULL;
 408
 409     p_input->pf_demux  = CDDADemux;
 410     p_input->pf_rewind = NULL;
 411     p_input->p_demux_data = p_demux;
 412
 413     vlc_mutex_lock( &p_input->stream.stream_lock );
 414     if( input_AddProgram( p_input, 0, 0) == NULL )
 415     {
 416         msg_Err( p_input, "cannot add program" );
 417         free( p_input->p_demux_data );
 418         return( -1 );
 419     }
 420     p_input->stream.pp_programs[0]->b_is_ok = 0;
 421     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 422
 423     /* create our ES */
 424     p_demux->p_es = input_AddES( p_input,
 425                                  p_input->stream.p_selected_program,
 426                                  1 /* id */, AUDIO_ES, NULL, 0 );
 427     if( !p_demux->p_es )
 428     {
 429         vlc_mutex_unlock( &p_input->stream.stream_lock );
 430         msg_Err( p_input, "out of memory" );
 431         free( p_input->p_demux_data );
 432         return( -1 );
 433     }
 434     p_demux->p_es->i_stream_id = 1;
 435     p_demux->p_es->i_fourcc = VLC_FOURCC('a','r','a','w');
 436
 437     p_demux->p_es->p_waveformatex = p_wf = malloc( sizeof( WAVEFORMATEX ) );
 438     p_wf->wFormatTag = WAVE_FORMAT_PCM;
 439     p_wf->nChannels = 2;
 440     p_wf->nSamplesPerSec = 44100;
 441     p_wf->nAvgBytesPerSec = 2 * 44100 * 2;
 442     p_wf->nBlockAlign = 4;
 443     p_wf->wBitsPerSample = 16;
 444     p_wf->cbSize = 0;
 445
 446     input_SelectES( p_input, p_demux->p_es );
 447
 448     p_input->stream.p_selected_program->b_is_ok = 1;
 449     vlc_mutex_unlock( &p_input->stream.stream_lock );
 450
 451     return VLC_SUCCESS;
 452 }
 453
 454 static void CDDACloseDemux( vlc_object_t * p_this)
 455 {
 456     input_thread_t *p_input = (input_thread_t*)p_this;
 457     demux_sys_t    *p_demux = (demux_sys_t*)p_input->p_demux_data;
 458
 459     free( p_demux );
 460     p_input->p_demux_data = NULL;
 461     return;
 462 }
 463
 464 static int  CDDADemux( input_thread_t * p_input )
 465 {
 466     demux_sys_t    *p_demux = (demux_sys_t*)p_input->p_demux_data;
 467     ssize_t         i_read;
 468     data_packet_t * p_data;
 469     pes_packet_t *  p_pes;
 470
 471     input_ClockManageRef( p_input,
 472                           p_input->stream.p_selected_program,
 473                           p_demux->i_pts );
 474
 475     if( ( i_read = input_SplitBuffer( p_input, &p_data, CDDA_DATA_SIZE ) )
 476         <= 0 )
 477     {
 478         return 0; // EOF
 479     }
 480
 481     p_pes = input_NewPES( p_input->p_method_data );
 482
 483     if( p_pes == NULL )
 484     {
 485         msg_Err( p_input, "out of memory" );
 486         input_DeletePacket( p_input->p_method_data, p_data );
 487         return -1;
 488     }
 489
 490     p_pes->i_rate = p_input->stream.control.i_rate;
 491     p_pes->p_first = p_pes->p_last = p_data;
 492     p_pes->i_nb_data = 1;
 493     p_pes->i_pes_size = i_read;
 494
 495     p_pes->i_dts =
 496         p_pes->i_pts = input_ClockGetTS( p_input,
 497                                          p_input->stream.p_selected_program,
 498                                          p_demux->i_pts );
 499
 500     if( p_demux->p_es->p_decoder_fifo )
 501     {
 502         input_DecodePES( p_demux->p_es->p_decoder_fifo, p_pes );
 503     }
 504     else
 505     {
 506         input_DeletePES( p_input->p_method_data, p_pes );
 507     }
 508
 509     p_demux->i_pts += ((mtime_t)90000) * i_read
 510                       / (mtime_t)44100 / 4 /* stereo 16 bits */;
 511     return 1;
 512 }