git.sesse.net Git - vlc/blob - modules/demux/au.c

   1 /*****************************************************************************
   2  * au.c : au file input module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2001-2003 VideoLAN
   5  * $Id: au.c,v 1.6 2003/09/07 22:48:29 fenrir Exp $
   6  *
   7  * Authors: Laurent Aimar <fenrir@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28
  29 #include <vlc/vlc.h>
  30 #include <vlc/input.h>
  31
  32 #include <codecs.h>
  33
  34 /*****************************************************************************
  35  * Module descriptor
  36  *****************************************************************************/
  37 static int  Open    ( vlc_object_t * );
  38 static void Close  ( vlc_object_t * );
  39
  40 vlc_module_begin();
  41     set_description( _("AU demuxer") );
  42     set_capability( "demux", 142 );
  43     set_callbacks( Open, Close );
  44 vlc_module_end();
  45
  46 /*
  47  * TODO:
  48  *  - all adpcm things (I _NEED_ samples)
  49  */
  50
  51 /*****************************************************************************
  52  * Local prototypes
  53  *****************************************************************************/
  54 static int    DemuxPCM   ( input_thread_t * );
  55 /* TODO static int    DemuxADPCM   ( input_thread_t * ); */
  56
  57 enum AuType_e
  58 {
  59     AU_UNKNOWN      =  0,
  60     AU_MULAW_8      =  1,  /* 8-bit ISDN u-law */
  61     AU_LINEAR_8     =  2,  /* 8-bit linear PCM */
  62     AU_LINEAR_16    =  3,  /* 16-bit linear PCM */
  63     AU_LINEAR_24    =  4,  /* 24-bit linear PCM */
  64     AU_LINEAR_32    =  5,  /* 32-bit linear PCM */
  65     AU_FLOAT        =  6,  /* 32-bit IEEE floating point */
  66     AU_DOUBLE       =  7,  /* 64-bit IEEE floating point */
  67     AU_ADPCM_G721   =  23, /* 4-bit CCITT g.721 ADPCM */
  68     AU_ADPCM_G722   =  24, /* CCITT g.722 ADPCM */
  69     AU_ADPCM_G723_3 =  25, /* CCITT g.723 3-bit ADPCM */
  70     AU_ADPCM_G723_5 =  26, /* CCITT g.723 5-bit ADPCM */
  71     AU_ALAW_8       =  27  /* 8-bit ISDN A-law */
  72 };
  73
  74 enum AuCat_e
  75 {
  76     AU_CAT_UNKNOWN  = 0,
  77     AU_CAT_PCM      = 1,
  78     AU_CAT_ADPCM    = 2
  79 };
  80
  81 typedef struct
  82 #ifdef HAVE_ATTRIBUTE_PACKED
  83     __attribute__((__packed__))
  84 #endif
  85 {
  86     uint32_t    i_header_size;
  87     uint32_t    i_data_size;
  88     uint32_t    i_encoding;
  89     uint32_t    i_sample_rate;
  90     uint32_t    i_channels;
  91 } au_t;
  92
  93 struct demux_sys_t
  94 {
  95     stream_t        *s;
  96
  97     au_t            au;
  98     WAVEFORMATEX    wf;
  99
 100     mtime_t         i_time;
 101
 102     es_descriptor_t *p_es;
 103
 104     int             i_frame_size;
 105     mtime_t         i_frame_length;
 106 };
 107
 108
 109 /*****************************************************************************
 110  * Open: check file and initializes structures
 111  *****************************************************************************/
 112 static int Open( vlc_object_t * p_this )
 113 {
 114     input_thread_t *p_input = (input_thread_t *)p_this;
 115     demux_sys_t    *p_sys;
 116
 117     uint8_t         *p_peek;
 118
 119     vlc_fourcc_t    i_fourcc;
 120
 121     int             i_cat;
 122
 123     /* a little test to see if it's a au file */
 124     if( input_Peek( p_input, &p_peek, 4 ) < 4 )
 125     {
 126         msg_Warn( p_input, "AU module discarded (cannot peek)" );
 127         return VLC_EGENERIC;
 128     }
 129     if( strncmp( p_peek, ".snd", 4 ) )
 130     {
 131         msg_Warn( p_input, "AU module discarded (not a valid file)" );
 132         return VLC_EGENERIC;
 133     }
 134
 135     p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
 136     p_sys->i_time = 0;
 137
 138
 139     if( ( p_sys->s = stream_OpenInput( p_input ) ) == NULL )
 140     {
 141         msg_Err( p_input, "cannot create stream" );
 142         goto error;
 143     }
 144
 145     /* skip signature */
 146     stream_Read( p_sys->s, NULL, 4 );   /* cannot fail */
 147
 148     /* read header */
 149     if( stream_Read( p_sys->s, &p_sys->au, sizeof( au_t ) ) < (int)sizeof( au_t ) )
 150     {
 151         msg_Err( p_input, "cannot load header" );
 152         goto error;
 153     }
 154     p_sys->au.i_header_size   = GetDWBE( &p_sys->au.i_header_size );
 155     p_sys->au.i_data_size     = GetDWBE( &p_sys->au.i_data_size );
 156     p_sys->au.i_encoding      = GetDWBE( &p_sys->au.i_encoding );
 157     p_sys->au.i_sample_rate   = GetDWBE( &p_sys->au.i_sample_rate );
 158     p_sys->au.i_channels      = GetDWBE( &p_sys->au.i_channels );
 159
 160     msg_Dbg( p_input,
 161              "au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
 162              p_sys->au.i_header_size,
 163              p_sys->au.i_data_size,
 164              p_sys->au.i_encoding,
 165              p_sys->au.i_sample_rate,
 166              p_sys->au.i_channels );
 167
 168     if( p_sys->au.i_header_size < 24 )
 169     {
 170         msg_Warn( p_input, "AU module discarded (not a valid file)" );
 171         goto error;
 172     }
 173
 174     /* skip extra header data */
 175     if( p_sys->au.i_header_size > 4 + sizeof( au_t ) )
 176     {
 177         stream_Read( p_sys->s, NULL, p_sys->au.i_header_size - 4 - sizeof( au_t ) );
 178     }
 179
 180     /* Create WAVEFORMATEX structure */
 181     p_sys->wf.nChannels     = p_sys->au.i_channels;
 182     p_sys->wf.nSamplesPerSec= p_sys->au.i_sample_rate;
 183     p_sys->wf.cbSize        = 0;
 184
 185     switch( p_sys->au.i_encoding )
 186     {
 187         case AU_ALAW_8:        /* 8-bit ISDN A-law */
 188             p_sys->wf.wFormatTag     = WAVE_FORMAT_ALAW;   // FIXME ??
 189             p_sys->wf.wBitsPerSample = 8;
 190             p_sys->wf.nBlockAlign    = 1 * p_sys->wf.nChannels;
 191             i_fourcc                 = VLC_FOURCC( 'a','l','a','w' );
 192             i_cat                    = AU_CAT_PCM;
 193             break;
 194
 195         case AU_MULAW_8:       /* 8-bit ISDN u-law */
 196             p_sys->wf.wFormatTag     = WAVE_FORMAT_MULAW;   // FIXME ??
 197             p_sys->wf.wBitsPerSample = 8;
 198             p_sys->wf.nBlockAlign    = 1 * p_sys->wf.nChannels;
 199             i_fourcc                 = VLC_FOURCC( 'u','l','a','w' );
 200             i_cat                    = AU_CAT_PCM;
 201             break;
 202
 203         case AU_LINEAR_8:      /* 8-bit linear PCM */
 204             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 205             p_sys->wf.wBitsPerSample = 8;
 206             p_sys->wf.nBlockAlign    = 1 * p_sys->wf.nChannels;
 207             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 208             i_cat                    = AU_CAT_PCM;
 209             break;
 210
 211         case AU_LINEAR_16:     /* 16-bit linear PCM */
 212             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 213             p_sys->wf.wBitsPerSample = 16;
 214             p_sys->wf.nBlockAlign    = 2 * p_sys->wf.nChannels;
 215             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 216             i_cat                    = AU_CAT_PCM;
 217             break;
 218
 219         case AU_LINEAR_24:     /* 24-bit linear PCM */
 220             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 221             p_sys->wf.wBitsPerSample = 24;
 222             p_sys->wf.nBlockAlign    = 3 * p_sys->wf.nChannels;
 223             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 224             i_cat                    = AU_CAT_PCM;
 225             break;
 226
 227         case AU_LINEAR_32:     /* 32-bit linear PCM */
 228             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 229             p_sys->wf.wBitsPerSample = 32;
 230             p_sys->wf.nBlockAlign    = 4 * p_sys->wf.nChannels;
 231             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 232             i_cat                    = AU_CAT_PCM;
 233             break;
 234
 235         case AU_FLOAT:         /* 32-bit IEEE floating point */
 236             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 237             p_sys->wf.wBitsPerSample = 32;
 238             p_sys->wf.nBlockAlign    = 4 * p_sys->wf.nChannels;
 239             i_fourcc                  = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
 240             i_cat                    = AU_CAT_PCM;
 241             break;
 242
 243         case AU_DOUBLE:        /* 64-bit IEEE floating point */
 244             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 245             p_sys->wf.wBitsPerSample = 64;
 246             p_sys->wf.nBlockAlign    = 8 * p_sys->wf.nChannels;
 247             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
 248             i_cat                    = AU_CAT_PCM;
 249             break;
 250
 251         case AU_ADPCM_G721:    /* 4-bit CCITT g.721 ADPCM */
 252             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 253             p_sys->wf.wBitsPerSample = 0;
 254             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 255             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
 256             i_cat                    = AU_CAT_ADPCM;
 257             break;
 258
 259         case AU_ADPCM_G722:    /* CCITT g.722 ADPCM */
 260             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 261             p_sys->wf.wBitsPerSample = 0;
 262             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 263             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
 264             i_cat                    = AU_CAT_ADPCM;
 265             break;
 266
 267         case AU_ADPCM_G723_3:  /* CCITT g.723 3-bit ADPCM */
 268             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 269             p_sys->wf.wBitsPerSample = 0;
 270             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 271             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
 272             i_cat                    = AU_CAT_ADPCM;
 273             break;
 274
 275         case AU_ADPCM_G723_5:  /* CCITT g.723 5-bit ADPCM */
 276             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 277             p_sys->wf.wBitsPerSample = 0;
 278             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 279             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
 280             i_cat                    = AU_CAT_ADPCM;
 281             break;
 282
 283         default:
 284             msg_Warn( p_input, "unknow encoding=0x%x", p_sys->au.i_encoding );
 285             i_cat                    = AU_CAT_UNKNOWN;
 286             goto error;
 287     }
 288     p_sys->wf.nAvgBytesPerSec        = p_sys->wf.nSamplesPerSec * p_sys->wf.nChannels * p_sys->wf.wBitsPerSample / 8;
 289
 290
 291
 292     if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
 293     {
 294         p_sys->i_frame_size = 0;
 295         p_sys->i_frame_length = 0;
 296
 297         msg_Err( p_input, "unsupported codec/type (Please report it)" );
 298         goto error;
 299     }
 300     else
 301     {
 302         int i_samples, i_modulo;
 303
 304         /* read samples for 50ms of */
 305         i_samples = __MAX( p_sys->wf.nSamplesPerSec / 20, 1 );
 306
 307         p_sys->i_frame_size = i_samples * p_sys->wf.nChannels * ( (p_sys->wf.wBitsPerSample + 7) / 8 );
 308
 309         if( p_sys->wf.nBlockAlign > 0 )
 310         {
 311             if( ( i_modulo = p_sys->i_frame_size % p_sys->wf.nBlockAlign ) != 0 )
 312             {
 313                 p_sys->i_frame_size += p_sys->wf.nBlockAlign - i_modulo;
 314             }
 315         }
 316
 317         p_sys->i_frame_length = (mtime_t)1000000 *
 318                                 (mtime_t)i_samples /
 319                                 (mtime_t)p_sys->wf.nSamplesPerSec;
 320
 321         p_input->pf_demux = DemuxPCM;
 322         p_input->pf_demux_control = demux_vaControlDefault;
 323     }
 324
 325     /*  create one program */
 326     vlc_mutex_lock( &p_input->stream.stream_lock );
 327     if( input_InitStream( p_input, 0 ) == -1)
 328     {
 329         vlc_mutex_unlock( &p_input->stream.stream_lock );
 330         msg_Err( p_input, "cannot init stream" );
 331         goto error;
 332     }
 333     if( input_AddProgram( p_input, 0, 0) == NULL )
 334     {
 335         vlc_mutex_unlock( &p_input->stream.stream_lock );
 336         msg_Err( p_input, "cannot add program" );
 337         goto error;
 338     }
 339
 340     p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
 341     p_input->stream.i_mux_rate =  p_sys->wf.nAvgBytesPerSec / 50;
 342
 343     p_sys->p_es = input_AddES( p_input, p_input->stream.p_selected_program,
 344                                0x01, AUDIO_ES, NULL, 0 );
 345
 346     p_sys->p_es->i_stream_id   = 0x01;
 347     p_sys->p_es->i_fourcc      = i_fourcc;
 348     p_sys->p_es->p_waveformatex= malloc( sizeof( WAVEFORMATEX ) );
 349     memcpy( p_sys->p_es->p_waveformatex, &p_sys->wf, sizeof( WAVEFORMATEX ) );
 350
 351     input_SelectES( p_input, p_sys->p_es );
 352
 353     p_input->stream.p_selected_program->b_is_ok = 1;
 354     vlc_mutex_unlock( &p_input->stream.stream_lock );
 355
 356     return VLC_SUCCESS;
 357
 358 error:
 359     if( p_sys->s )
 360     {
 361         stream_Release( p_sys->s );
 362     }
 363     free( p_sys );
 364     return VLC_EGENERIC;
 365 }
 366
 367 /*****************************************************************************
 368  * DemuxPCM: read packet and send them to decoders
 369  *****************************************************************************
 370  * Returns -1 in case of error, 0 in case of EOF, 1 otherwise
 371  *****************************************************************************/
 372 static int DemuxPCM( input_thread_t *p_input )
 373 {
 374     demux_sys_t  *p_sys = p_input->p_demux_data;
 375     pes_packet_t *p_pes;
 376
 377     if( p_input->stream.p_selected_program->i_synchro_state == SYNCHRO_REINIT )
 378     {
 379         int64_t i_pos = stream_Tell( p_sys->s );
 380
 381         if( p_sys->wf.nBlockAlign != 0 )
 382         {
 383             i_pos += p_sys->wf.nBlockAlign - i_pos % p_sys->wf.nBlockAlign;
 384             if( stream_Seek( p_sys->s, i_pos ) )
 385             {
 386                 msg_Err( p_input, "Seek failed(cannot resync)" );
 387             }
 388         }
 389     }
 390
 391     input_ClockManageRef( p_input,
 392                           p_input->stream.p_selected_program,
 393                           p_sys->i_time * 9 / 100 );
 394
 395     if( ( p_pes = stream_PesPacket( p_sys->s, p_sys->i_frame_size ) ) == NULL )
 396     {
 397         msg_Warn( p_input, "cannot read data" );
 398         return 0;
 399     }
 400     p_pes->i_dts =
 401     p_pes->i_pts = input_ClockGetTS( p_input,
 402                                      p_input->stream.p_selected_program,
 403                                      p_sys->i_time * 9 / 100 );
 404
 405     if( !p_sys->p_es->p_decoder_fifo )
 406     {
 407         msg_Err( p_input, "no audio decoder" );
 408         input_DeletePES( p_input->p_method_data, p_pes );
 409         return( -1 );
 410     }
 411
 412     input_DecodePES( p_sys->p_es->p_decoder_fifo, p_pes );
 413     p_sys->i_time += p_sys->i_frame_length;
 414     return( 1 );
 415 }
 416
 417 /*****************************************************************************
 418  * Close: frees unused data
 419  *****************************************************************************/
 420 static void Close( vlc_object_t * p_this )
 421 {
 422     input_thread_t *p_input = (input_thread_t *)p_this;
 423     demux_sys_t    *p_sys = p_input->p_demux_data;
 424
 425     stream_Release( p_sys->s );
 426     free( p_sys );
 427 }
 428