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 1.7 2003/11/24 00:39:01 fenrir 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     set_capability( "access", 70 );
  94     add_integer( "cdda-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT, CACHING_LONGTEXT, VLC_TRUE );
  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     /* parse the options passed in command line : */
 121     psz_orig = psz_parser = psz_source = strdup( p_input->psz_name );
 122
 123     if( !psz_orig )
 124     {
 125         return( -1 );
 126     }
 127
 128     while( *psz_parser && *psz_parser != '@' )
 129     {
 130         psz_parser++;
 131     }
 132
 133     if( *psz_parser == '@' )
 134     {
 135         /* Found options */
 136         *psz_parser = '\0';
 137         ++psz_parser;
 138
 139         i_title = (int)strtol( psz_parser, NULL, 10 );
 140         i_title = i_title ? i_title : 1;
 141     }
 142
 143     if( !*psz_source )
 144     {
 145         if( !p_input->psz_access )
 146         {
 147             free( psz_orig );
 148             return -1;
 149         }
 150         psz_source = config_GetPsz( p_input, "vcd" );
 151         if( !psz_source ) return -1;
 152     }
 153
 154     /* Open CDDA */
 155     if( !(vcddev = ioctl_Open( p_this, psz_source )) )
 156     {
 157         msg_Warn( p_input, "could not open %s", psz_source );
 158         free( psz_source );
 159         return -1;
 160     }
 161     free( psz_source );
 162
 163     p_cdda = malloc( sizeof(cdda_data_t) );
 164     if( p_cdda == NULL )
 165     {
 166         msg_Err( p_input, "out of memory" );
 167         free( psz_source );
 168         return -1;
 169     }
 170
 171     p_cdda->vcddev = vcddev;
 172     p_input->p_access_data = (void *)p_cdda;
 173
 174     p_input->i_mtu = CDDA_DATA_ONCE;
 175
 176     /* We read the Table Of Content information */
 177     p_cdda->i_nb_tracks = ioctl_GetTracksMap( VLC_OBJECT(p_input),
 178                               p_cdda->vcddev, &p_cdda->p_sectors );
 179     if( p_cdda->i_nb_tracks < 0 )
 180         msg_Err( p_input, "unable to count tracks" );
 181     else if( p_cdda->i_nb_tracks <= 0 )
 182         msg_Err( p_input, "no audio tracks found" );
 183
 184     if( p_cdda->i_nb_tracks <= 1)
 185     {
 186         ioctl_Close( p_this, p_cdda->vcddev );
 187         free( p_cdda );
 188         return -1;
 189     }
 190
 191     if( i_title >= p_cdda->i_nb_tracks || i_title < 1 )
 192         i_title = 1;
 193
 194     /* Set stream and area data */
 195     vlc_mutex_lock( &p_input->stream.stream_lock );
 196
 197     /* Initialize ES structures */
 198     input_InitStream( p_input, 0 );
 199
 200     /* cdda input method */
 201     p_input->stream.i_method = INPUT_METHOD_CDDA;
 202
 203     p_input->stream.b_pace_control = 1;
 204     p_input->stream.b_seekable = 1;
 205     p_input->stream.i_mux_rate = 44100 * 4 / 50;
 206
 207 #define area p_input->stream.pp_areas
 208     for( i = 1 ; i <= p_cdda->i_nb_tracks ; i++ )
 209     {
 210         input_AddArea( p_input, i, 1 );
 211
 212         /* Absolute start offset and size */
 213         area[i]->i_start =
 214             (off_t)p_cdda->p_sectors[i-1] * (off_t)CDDA_DATA_SIZE;
 215         area[i]->i_size =
 216             (off_t)(p_cdda->p_sectors[i] - p_cdda->p_sectors[i-1])
 217             * (off_t)CDDA_DATA_SIZE;
 218     }
 219 #undef area
 220
 221     p_area = p_input->stream.pp_areas[i_title];
 222
 223     CDDASetArea( p_input, p_area );
 224
 225     vlc_mutex_unlock( &p_input->stream.stream_lock );
 226
 227     if( !p_input->psz_demux || !*p_input->psz_demux )
 228     {
 229         p_input->psz_demux = "cdda";
 230     }
 231
 232     p_input->pf_read = CDDARead;
 233     p_input->pf_seek = CDDASeek;
 234     p_input->pf_set_area = CDDASetArea;
 235     p_input->pf_set_program = CDDASetProgram;
 236
 237     /* Update default_pts to a suitable value for cdda access */
 238     p_input->i_pts_delay = config_GetInt( p_input, "cdda-caching" ) * 1000;
 239
 240     return 0;
 241 }
 242
 243 /*****************************************************************************
 244  * CDDAClose: closes cdda
 245  *****************************************************************************/
 246 static void CDDAClose( vlc_object_t *p_this )
 247 {
 248     input_thread_t *   p_input = (input_thread_t *)p_this;
 249     cdda_data_t *p_cdda = (cdda_data_t *)p_input->p_access_data;
 250
 251     ioctl_Close( p_this, p_cdda->vcddev );
 252     free( p_cdda );
 253 }
 254
 255 /*****************************************************************************
 256  * CDDARead: reads from the CDDA into PES packets.
 257  *****************************************************************************
 258  * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
 259  * bytes.
 260  *****************************************************************************/
 261 static int CDDARead( input_thread_t * p_input, byte_t * p_buffer,
 262                      size_t i_len )
 263 {
 264     cdda_data_t *           p_cdda;
 265     int                     i_blocks;
 266     int                     i_index;
 267     int                     i_read;
 268
 269     p_cdda = (cdda_data_t *)p_input->p_access_data;
 270
 271     i_read = 0;
 272
 273     /* Compute the number of blocks we have to read */
 274
 275     i_blocks = i_len / CDDA_DATA_SIZE;
 276
 277     if ( ioctl_ReadSectors( VLC_OBJECT(p_input), p_cdda->vcddev,
 278              p_cdda->i_sector, p_buffer, i_blocks, CDDA_TYPE ) < 0 )
 279     {
 280         msg_Err( p_input, "could not read sector %d", p_cdda->i_sector );
 281         return -1;
 282     }
 283
 284     for ( i_index = 0; i_index < i_blocks; i_index++ )
 285     {
 286         p_cdda->i_sector ++;
 287         if ( p_cdda->i_sector == p_cdda->p_sectors[p_cdda->i_track + 1] )
 288         {
 289             input_area_t *p_area;
 290
 291             if ( p_cdda->i_track >= p_cdda->i_nb_tracks - 1 )
 292                 return 0; /* EOF */
 293
 294             vlc_mutex_lock( &p_input->stream.stream_lock );
 295             p_area = p_input->stream.pp_areas[
 296                     p_input->stream.p_selected_area->i_id + 1 ];
 297
 298             msg_Dbg( p_input, "new title" );
 299
 300             p_area->i_part = 1;
 301             CDDASetArea( p_input, p_area );
 302             vlc_mutex_unlock( &p_input->stream.stream_lock );
 303         }
 304         i_read += CDDA_DATA_SIZE;
 305     }
 306
 307     if ( i_len % CDDA_DATA_SIZE ) /* this should not happen */
 308     {
 309         msg_Err( p_input, "must read full sectors" );
 310     }
 311
 312     return i_read;
 313 }
 314
 315
 316 /*****************************************************************************
 317  * CDDASetProgram: Does nothing since a CDDA is mono_program
 318  *****************************************************************************/
 319 static int CDDASetProgram( input_thread_t * p_input,
 320                            pgrm_descriptor_t * p_program)
 321 {
 322     return 0;
 323 }
 324
 325
 326 /*****************************************************************************
 327  * CDDASetArea: initialize input data for title x.
 328  * It should be called for each user navigation request.
 329  ****************************************************************************/
 330 static int CDDASetArea( input_thread_t * p_input, input_area_t * p_area )
 331 {
 332     cdda_data_t *p_cdda = (cdda_data_t*)p_input->p_access_data;
 333     vlc_value_t val;
 334
 335     /* we can't use the interface slider until initilization is complete */
 336     p_input->stream.b_seekable = 0;
 337
 338     if( p_area != p_input->stream.p_selected_area )
 339     {
 340         /* Change the default area */
 341         p_input->stream.p_selected_area = p_area;
 342
 343         /* Change the current track */
 344         p_cdda->i_track = p_area->i_id - 1;
 345         p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track];
 346
 347         /* Update the navigation variables without triggering a callback */
 348         val.i_int = p_area->i_id;
 349         var_Change( p_input, "title", VLC_VAR_SETVALUE, &val, NULL );
 350     }
 351
 352     p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track];
 353
 354     p_input->stream.p_selected_area->i_tell =
 355         (off_t)p_cdda->i_sector * (off_t)CDDA_DATA_SIZE
 356          - p_input->stream.p_selected_area->i_start;
 357
 358     /* warn interface that something has changed */
 359     p_input->stream.b_seekable = 1;
 360     p_input->stream.b_changed = 1;
 361
 362     return 0;
 363 }
 364
 365
 366 /****************************************************************************
 367  * CDDASeek
 368  ****************************************************************************/
 369 static void CDDASeek( input_thread_t * p_input, off_t i_off )
 370 {
 371     cdda_data_t * p_cdda;
 372
 373     p_cdda = (cdda_data_t *) p_input->p_access_data;
 374
 375     p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track]
 376                        + i_off / (off_t)CDDA_DATA_SIZE;
 377
 378     vlc_mutex_lock( &p_input->stream.stream_lock );
 379     p_input->stream.p_selected_area->i_tell =
 380         (off_t)p_cdda->i_sector * (off_t)CDDA_DATA_SIZE
 381          - p_input->stream.p_selected_area->i_start;
 382     vlc_mutex_unlock( &p_input->stream.stream_lock );
 383 }
 384
 385 /****************************************************************************
 386  * Demux Part
 387  ****************************************************************************/
 388 static int  CDDAOpenDemux    ( vlc_object_t * p_this)
 389 {
 390     input_thread_t *p_input = (input_thread_t *)p_this;
 391     demux_sys_t    *p_demux;
 392     WAVEFORMATEX   *p_wf;
 393
 394     if( p_input->stream.i_method != INPUT_METHOD_CDDA )
 395     {
 396         return VLC_EGENERIC;
 397     }
 398
 399     p_demux = malloc( sizeof( es_descriptor_t ) );
 400     p_demux->i_pts = 0;
 401     p_demux->p_es = NULL;
 402
 403     p_input->pf_demux  = CDDADemux;
 404     p_input->pf_demux_control = demux_vaControlDefault;
 405     p_input->pf_rewind = NULL;
 406     p_input->p_demux_data = p_demux;
 407
 408     vlc_mutex_lock( &p_input->stream.stream_lock );
 409     if( input_AddProgram( p_input, 0, 0) == NULL )
 410     {
 411         msg_Err( p_input, "cannot add program" );
 412         free( p_input->p_demux_data );
 413         return( -1 );
 414     }
 415     p_input->stream.pp_programs[0]->b_is_ok = 0;
 416     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 417
 418     /* create our ES */
 419     p_demux->p_es = input_AddES( p_input,
 420                                  p_input->stream.p_selected_program,
 421                                  1 /* id */, AUDIO_ES, NULL, 0 );
 422     if( !p_demux->p_es )
 423     {
 424         vlc_mutex_unlock( &p_input->stream.stream_lock );
 425         msg_Err( p_input, "out of memory" );
 426         free( p_input->p_demux_data );
 427         return( -1 );
 428     }
 429     p_demux->p_es->i_stream_id = 1;
 430     p_demux->p_es->i_fourcc = VLC_FOURCC('a','r','a','w');
 431
 432     p_demux->p_es->p_waveformatex = p_wf = malloc( sizeof( WAVEFORMATEX ) );
 433     p_wf->wFormatTag = WAVE_FORMAT_PCM;
 434     p_wf->nChannels = 2;
 435     p_wf->nSamplesPerSec = 44100;
 436     p_wf->nAvgBytesPerSec = 2 * 44100 * 2;
 437     p_wf->nBlockAlign = 4;
 438     p_wf->wBitsPerSample = 16;
 439     p_wf->cbSize = 0;
 440
 441     input_SelectES( p_input, p_demux->p_es );
 442
 443     p_input->stream.p_selected_program->b_is_ok = 1;
 444     vlc_mutex_unlock( &p_input->stream.stream_lock );
 445
 446     return VLC_SUCCESS;
 447 }
 448
 449 static void CDDACloseDemux( vlc_object_t * p_this)
 450 {
 451     input_thread_t *p_input = (input_thread_t*)p_this;
 452     demux_sys_t    *p_demux = (demux_sys_t*)p_input->p_demux_data;
 453
 454     free( p_demux );
 455     p_input->p_demux_data = NULL;
 456     return;
 457 }
 458
 459 static int  CDDADemux( input_thread_t * p_input )
 460 {
 461     demux_sys_t    *p_demux = (demux_sys_t*)p_input->p_demux_data;
 462     ssize_t         i_read;
 463     data_packet_t * p_data;
 464     pes_packet_t *  p_pes;
 465
 466     input_ClockManageRef( p_input,
 467                           p_input->stream.p_selected_program,
 468                           p_demux->i_pts );
 469
 470     if( ( i_read = input_SplitBuffer( p_input, &p_data, CDDA_DATA_SIZE ) )
 471         <= 0 )
 472     {
 473         return 0; // EOF
 474     }
 475
 476     p_pes = input_NewPES( p_input->p_method_data );
 477
 478     if( p_pes == NULL )
 479     {
 480         msg_Err( p_input, "out of memory" );
 481         input_DeletePacket( p_input->p_method_data, p_data );
 482         return -1;
 483     }
 484
 485     p_pes->i_rate = p_input->stream.control.i_rate;
 486     p_pes->p_first = p_pes->p_last = p_data;
 487     p_pes->i_nb_data = 1;
 488     p_pes->i_pes_size = i_read;
 489
 490     p_pes->i_dts =
 491         p_pes->i_pts = input_ClockGetTS( p_input,
 492                                          p_input->stream.p_selected_program,
 493                                          p_demux->i_pts );
 494
 495     if( p_demux->p_es->p_dec )
 496     {
 497         input_DecodePES( p_demux->p_es->p_dec, p_pes );
 498     }
 499     else
 500     {
 501         input_DeletePES( p_input->p_method_data, p_pes );
 502     }
 503
 504     p_demux->i_pts += ((mtime_t)90000) * i_read
 505                       / (mtime_t)44100 / 4 /* stereo 16 bits */;
 506     return 1;
 507 }