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 1.1 2003/05/17 20:30:31 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", 80 );
  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     return 0;
 244 }
 245
 246 /*****************************************************************************
 247  * CDDAClose: closes cdda
 248  *****************************************************************************/
 249 static void CDDAClose( vlc_object_t *p_this )
 250 {
 251     input_thread_t *   p_input = (input_thread_t *)p_this;
 252     cdda_data_t *p_cdda = (cdda_data_t *)p_input->p_access_data;
 253
 254     ioctl_Close( p_this, p_cdda->vcddev );
 255     free( p_cdda );
 256 }
 257
 258 /*****************************************************************************
 259  * CDDARead: reads from the CDDA into PES packets.
 260  *****************************************************************************
 261  * Returns -1 in case of error, 0 in case of EOF, otherwise the number of
 262  * bytes.
 263  *****************************************************************************/
 264 static int CDDARead( input_thread_t * p_input, byte_t * p_buffer,
 265                      size_t i_len )
 266 {
 267     cdda_data_t *           p_cdda;
 268     int                     i_blocks;
 269     int                     i_index;
 270     int                     i_read;
 271
 272     p_cdda = (cdda_data_t *)p_input->p_access_data;
 273
 274     i_read = 0;
 275
 276     /* Compute the number of blocks we have to read */
 277
 278     i_blocks = i_len / CDDA_DATA_SIZE;
 279
 280     for ( i_index = 0; i_index < i_blocks; i_index++ )
 281     {
 282         if ( ioctl_ReadSector( VLC_OBJECT(p_input), p_cdda->vcddev,
 283                  p_cdda->i_sector, p_buffer + i_index * CDDA_DATA_SIZE,
 284                  CDDA_DATA_START, CDDA_DATA_SIZE ) < 0 )
 285         {
 286             msg_Err( p_input, "could not read sector %d", p_cdda->i_sector );
 287             return -1;
 288         }
 289
 290         p_cdda->i_sector ++;
 291         if ( p_cdda->i_sector == p_cdda->p_sectors[p_cdda->i_track + 1] )
 292         {
 293             input_area_t *p_area;
 294
 295             if ( p_cdda->i_track >= p_cdda->i_nb_tracks - 1 )
 296                 return 0; /* EOF */
 297
 298             vlc_mutex_lock( &p_input->stream.stream_lock );
 299             p_area = p_input->stream.pp_areas[
 300                     p_input->stream.p_selected_area->i_id + 1 ];
 301
 302             msg_Dbg( p_input, "new title" );
 303
 304             p_area->i_part = 1;
 305             CDDASetArea( p_input, p_area );
 306             vlc_mutex_unlock( &p_input->stream.stream_lock );
 307         }
 308         i_read += CDDA_DATA_SIZE;
 309     }
 310
 311     if ( i_len % CDDA_DATA_SIZE ) /* this should not happen */
 312     {
 313         msg_Err( p_input, "must read full sectors" );
 314     }
 315
 316     return i_read;
 317 }
 318
 319
 320 /*****************************************************************************
 321  * CDDASetProgram: Does nothing since a CDDA is mono_program
 322  *****************************************************************************/
 323 static int CDDASetProgram( input_thread_t * p_input,
 324                            pgrm_descriptor_t * p_program)
 325 {
 326     return 0;
 327 }
 328
 329
 330 /*****************************************************************************
 331  * CDDASetArea: initialize input data for title x.
 332  * It should be called for each user navigation request.
 333  ****************************************************************************/
 334 static int CDDASetArea( input_thread_t * p_input, input_area_t * p_area )
 335 {
 336     cdda_data_t *p_cdda = (cdda_data_t*)p_input->p_access_data;
 337     vlc_value_t val;
 338
 339     /* we can't use the interface slider until initilization is complete */
 340     p_input->stream.b_seekable = 0;
 341
 342     if( p_area != p_input->stream.p_selected_area )
 343     {
 344         /* Change the default area */
 345         p_input->stream.p_selected_area = p_area;
 346
 347         /* Change the current track */
 348         p_cdda->i_track = p_area->i_id - 1;
 349         p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track];
 350
 351         /* Update the navigation variables without triggering a callback */
 352         val.i_int = p_area->i_id;
 353         var_Change( p_input, "title", VLC_VAR_SETVALUE, &val, NULL );
 354     }
 355
 356     p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track];
 357
 358     p_input->stream.p_selected_area->i_tell =
 359         (off_t)p_cdda->i_sector * (off_t)CDDA_DATA_SIZE
 360          - p_input->stream.p_selected_area->i_start;
 361
 362     /* warn interface that something has changed */
 363     p_input->stream.b_seekable = 1;
 364     p_input->stream.b_changed = 1;
 365
 366     return 0;
 367 }
 368
 369
 370 /****************************************************************************
 371  * CDDASeek
 372  ****************************************************************************/
 373 static void CDDASeek( input_thread_t * p_input, off_t i_off )
 374 {
 375     cdda_data_t * p_cdda;
 376
 377     p_cdda = (cdda_data_t *) p_input->p_access_data;
 378
 379     p_cdda->i_sector = p_cdda->p_sectors[p_cdda->i_track]
 380                        + i_off / (off_t)CDDA_DATA_SIZE;
 381
 382     vlc_mutex_lock( &p_input->stream.stream_lock );
 383     p_input->stream.p_selected_area->i_tell =
 384         (off_t)p_cdda->i_sector * (off_t)CDDA_DATA_SIZE
 385          - p_input->stream.p_selected_area->i_start;
 386     vlc_mutex_unlock( &p_input->stream.stream_lock );
 387 }
 388
 389 /****************************************************************************
 390  * Demux Part
 391  ****************************************************************************/
 392 static int  CDDAOpenDemux    ( vlc_object_t * p_this)
 393 {
 394     input_thread_t *p_input = (input_thread_t *)p_this;
 395     demux_sys_t    *p_demux;
 396     WAVEFORMATEX   *p_wf;
 397
 398     if( p_input->stream.i_method != INPUT_METHOD_CDDA )
 399     {
 400         return VLC_EGENERIC;
 401     }
 402
 403     p_demux = malloc( sizeof( es_descriptor_t ) );
 404     p_demux->i_pts = 0;
 405     p_demux->p_es = NULL;
 406
 407     p_input->pf_demux  = CDDADemux;
 408     p_input->pf_rewind = NULL;
 409     p_input->p_demux_data = p_demux;
 410
 411     vlc_mutex_lock( &p_input->stream.stream_lock );
 412     if( input_AddProgram( p_input, 0, 0) == NULL )
 413     {
 414         msg_Err( p_input, "cannot add program" );
 415         free( p_input->p_demux_data );
 416         return( -1 );
 417     }
 418     p_input->stream.pp_programs[0]->b_is_ok = 0;
 419     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 420
 421     /* create our ES */
 422     p_demux->p_es = input_AddES( p_input,
 423                                  p_input->stream.p_selected_program,
 424                                  1 /* id */, AUDIO_ES, NULL, 0 );
 425     if( !p_demux->p_es )
 426     {
 427         vlc_mutex_unlock( &p_input->stream.stream_lock );
 428         msg_Err( p_input, "out of memory" );
 429         free( p_input->p_demux_data );
 430         return( -1 );
 431     }
 432     p_demux->p_es->i_stream_id = 1;
 433     p_demux->p_es->i_fourcc = VLC_FOURCC('a','r','a','w');
 434
 435     p_demux->p_es->p_waveformatex = p_wf = malloc( sizeof( WAVEFORMATEX ) );
 436     p_wf->wFormatTag = WAVE_FORMAT_PCM;
 437     p_wf->nChannels = 2;
 438     p_wf->nSamplesPerSec = 44100;
 439     p_wf->nAvgBytesPerSec = 2 * 44100 * 2;
 440     p_wf->nBlockAlign = 4;
 441     p_wf->wBitsPerSample = 16;
 442     p_wf->cbSize = 0;
 443
 444     input_SelectES( p_input, p_demux->p_es );
 445
 446     p_input->stream.p_selected_program->b_is_ok = 1;
 447     vlc_mutex_unlock( &p_input->stream.stream_lock );
 448
 449     return VLC_SUCCESS;
 450 }
 451
 452 static void CDDACloseDemux( vlc_object_t * p_this)
 453 {
 454     input_thread_t *p_input = (input_thread_t*)p_this;
 455     demux_sys_t    *p_demux = (demux_sys_t*)p_input->p_demux_data;
 456
 457     free( p_demux );
 458     p_input->p_demux_data = NULL;
 459     return;
 460 }
 461
 462 static int  CDDADemux( input_thread_t * p_input )
 463 {
 464     demux_sys_t    *p_demux = (demux_sys_t*)p_input->p_demux_data;
 465     ssize_t         i_read;
 466     data_packet_t * p_data;
 467     pes_packet_t *  p_pes;
 468
 469     input_ClockManageRef( p_input,
 470                           p_input->stream.p_selected_program,
 471                           p_demux->i_pts );
 472
 473     if( ( i_read = input_SplitBuffer( p_input, &p_data, CDDA_DATA_SIZE ) )
 474         <= 0 )
 475     {
 476         return 0; // EOF
 477     }
 478
 479     p_pes = input_NewPES( p_input->p_method_data );
 480
 481     if( p_pes == NULL )
 482     {
 483         msg_Err( p_input, "out of memory" );
 484         input_DeletePacket( p_input->p_method_data, p_data );
 485         return -1;
 486     }
 487
 488     p_pes->i_rate = p_input->stream.control.i_rate;
 489     p_pes->p_first = p_pes->p_last = p_data;
 490     p_pes->i_nb_data = 1;
 491     p_pes->i_pes_size = i_read;
 492
 493     p_pes->i_dts =
 494         p_pes->i_pts = input_ClockGetTS( p_input,
 495                                          p_input->stream.p_selected_program,
 496                                          p_demux->i_pts );
 497
 498     if( p_demux->p_es->p_decoder_fifo )
 499     {
 500         input_DecodePES( p_demux->p_es->p_decoder_fifo, p_pes );
 501     }
 502     else
 503     {
 504         input_DeletePES( p_input->p_method_data, p_pes );
 505     }
 506
 507     p_demux->i_pts += ((mtime_t)90000) * i_read
 508                       / (mtime_t)44100 / 4 /* stereo 16 bits */;
 509     return 1;
 510 }