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 1.5 2003/08/22 20:32:27 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 #include <ninput.h>
  34
  35 /*****************************************************************************
  36  * Module descriptor
  37  *****************************************************************************/
  38 static int  Open    ( vlc_object_t * );
  39 static void Close  ( vlc_object_t * );
  40
  41 vlc_module_begin();
  42     set_description( _("AU demuxer") );
  43     set_capability( "demux", 142 );
  44     set_callbacks( Open, Close );
  45 vlc_module_end();
  46
  47 /*
  48  * TODO:
  49  *  - all adpcm things (I _NEED_ samples)
  50  */
  51
  52 /*****************************************************************************
  53  * Local prototypes
  54  *****************************************************************************/
  55 static int    DemuxPCM   ( input_thread_t * );
  56 /* TODO static int    DemuxADPCM   ( input_thread_t * ); */
  57
  58 enum AuType_e
  59 {
  60     AU_UNKNOWN      =  0,
  61     AU_MULAW_8      =  1,  /* 8-bit ISDN u-law */
  62     AU_LINEAR_8     =  2,  /* 8-bit linear PCM */
  63     AU_LINEAR_16    =  3,  /* 16-bit linear PCM */
  64     AU_LINEAR_24    =  4,  /* 24-bit linear PCM */
  65     AU_LINEAR_32    =  5,  /* 32-bit linear PCM */
  66     AU_FLOAT        =  6,  /* 32-bit IEEE floating point */
  67     AU_DOUBLE       =  7,  /* 64-bit IEEE floating point */
  68     AU_ADPCM_G721   =  23, /* 4-bit CCITT g.721 ADPCM */
  69     AU_ADPCM_G722   =  24, /* CCITT g.722 ADPCM */
  70     AU_ADPCM_G723_3 =  25, /* CCITT g.723 3-bit ADPCM */
  71     AU_ADPCM_G723_5 =  26, /* CCITT g.723 5-bit ADPCM */
  72     AU_ALAW_8       =  27  /* 8-bit ISDN A-law */
  73 };
  74
  75 enum AuCat_e
  76 {
  77     AU_CAT_UNKNOWN  = 0,
  78     AU_CAT_PCM      = 1,
  79     AU_CAT_ADPCM    = 2
  80 };
  81
  82 typedef struct
  83 #ifdef HAVE_ATTRIBUTE_PACKED
  84     __attribute__((__packed__))
  85 #endif
  86 {
  87     uint32_t    i_header_size;
  88     uint32_t    i_data_size;
  89     uint32_t    i_encoding;
  90     uint32_t    i_sample_rate;
  91     uint32_t    i_channels;
  92 } au_t;
  93
  94 struct demux_sys_t
  95 {
  96     stream_t        *s;
  97
  98     au_t            au;
  99     WAVEFORMATEX    wf;
 100
 101     mtime_t         i_time;
 102
 103     es_descriptor_t *p_es;
 104
 105     int             i_frame_size;
 106     mtime_t         i_frame_length;
 107 };
 108
 109
 110 /*****************************************************************************
 111  * Open: check file and initializes structures
 112  *****************************************************************************/
 113 static int Open( vlc_object_t * p_this )
 114 {
 115     input_thread_t *p_input = (input_thread_t *)p_this;
 116     demux_sys_t    *p_sys;
 117
 118     uint8_t         *p_peek;
 119
 120     vlc_fourcc_t    i_fourcc;
 121
 122     int             i_cat;
 123
 124     /* a little test to see if it's a au file */
 125     if( input_Peek( p_input, &p_peek, 4 ) < 4 )
 126     {
 127         msg_Warn( p_input, "AU module discarded (cannot peek)" );
 128         return VLC_EGENERIC;
 129     }
 130     if( strncmp( p_peek, ".snd", 4 ) )
 131     {
 132         msg_Warn( p_input, "AU module discarded (not a valid file)" );
 133         return VLC_EGENERIC;
 134     }
 135
 136     p_input->p_demux_data = p_sys = malloc( sizeof( demux_sys_t ) );
 137     p_sys->i_time = 0;
 138
 139
 140     if( ( p_sys->s = stream_OpenInput( p_input ) ) == NULL )
 141     {
 142         msg_Err( p_input, "cannot create stream" );
 143         goto error;
 144     }
 145
 146     /* skip signature */
 147     stream_Read( p_sys->s, NULL, 4 );   /* cannot fail */
 148
 149     /* read header */
 150     if( stream_Read( p_sys->s, &p_sys->au, sizeof( au_t ) ) < (int)sizeof( au_t ) )
 151     {
 152         msg_Err( p_input, "cannot load header" );
 153         goto error;
 154     }
 155     p_sys->au.i_header_size   = GetDWBE( &p_sys->au.i_header_size );
 156     p_sys->au.i_data_size     = GetDWBE( &p_sys->au.i_data_size );
 157     p_sys->au.i_encoding      = GetDWBE( &p_sys->au.i_encoding );
 158     p_sys->au.i_sample_rate   = GetDWBE( &p_sys->au.i_sample_rate );
 159     p_sys->au.i_channels      = GetDWBE( &p_sys->au.i_channels );
 160
 161     msg_Dbg( p_input,
 162              "au file: header_size=%d data_size=%d encoding=0x%x sample_rate=%d channels=%d",
 163              p_sys->au.i_header_size,
 164              p_sys->au.i_data_size,
 165              p_sys->au.i_encoding,
 166              p_sys->au.i_sample_rate,
 167              p_sys->au.i_channels );
 168
 169     if( p_sys->au.i_header_size < 24 )
 170     {
 171         msg_Warn( p_input, "AU module discarded (not a valid file)" );
 172         goto error;
 173     }
 174
 175     /* skip extra header data */
 176     if( p_sys->au.i_header_size > 4 + sizeof( au_t ) )
 177     {
 178         stream_Read( p_sys->s, NULL, p_sys->au.i_header_size - 4 - sizeof( au_t ) );
 179     }
 180
 181     /* Create WAVEFORMATEX structure */
 182     p_sys->wf.nChannels     = p_sys->au.i_channels;
 183     p_sys->wf.nSamplesPerSec= p_sys->au.i_sample_rate;
 184     p_sys->wf.cbSize        = 0;
 185
 186     switch( p_sys->au.i_encoding )
 187     {
 188         case AU_ALAW_8:        /* 8-bit ISDN A-law */
 189             p_sys->wf.wFormatTag     = WAVE_FORMAT_ALAW;   // FIXME ??
 190             p_sys->wf.wBitsPerSample = 8;
 191             p_sys->wf.nBlockAlign    = 1 * p_sys->wf.nChannels;
 192             i_fourcc                 = VLC_FOURCC( 'a','l','a','w' );
 193             i_cat                    = AU_CAT_PCM;
 194             break;
 195
 196         case AU_MULAW_8:       /* 8-bit ISDN u-law */
 197             p_sys->wf.wFormatTag     = WAVE_FORMAT_MULAW;   // FIXME ??
 198             p_sys->wf.wBitsPerSample = 8;
 199             p_sys->wf.nBlockAlign    = 1 * p_sys->wf.nChannels;
 200             i_fourcc                 = VLC_FOURCC( 'u','l','a','w' );
 201             i_cat                    = AU_CAT_PCM;
 202             break;
 203
 204         case AU_LINEAR_8:      /* 8-bit linear PCM */
 205             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 206             p_sys->wf.wBitsPerSample = 8;
 207             p_sys->wf.nBlockAlign    = 1 * p_sys->wf.nChannels;
 208             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 209             i_cat                    = AU_CAT_PCM;
 210             break;
 211
 212         case AU_LINEAR_16:     /* 16-bit linear PCM */
 213             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 214             p_sys->wf.wBitsPerSample = 16;
 215             p_sys->wf.nBlockAlign    = 2 * p_sys->wf.nChannels;
 216             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 217             i_cat                    = AU_CAT_PCM;
 218             break;
 219
 220         case AU_LINEAR_24:     /* 24-bit linear PCM */
 221             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 222             p_sys->wf.wBitsPerSample = 24;
 223             p_sys->wf.nBlockAlign    = 3 * p_sys->wf.nChannels;
 224             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 225             i_cat                    = AU_CAT_PCM;
 226             break;
 227
 228         case AU_LINEAR_32:     /* 32-bit linear PCM */
 229             p_sys->wf.wFormatTag     = WAVE_FORMAT_PCM;
 230             p_sys->wf.wBitsPerSample = 32;
 231             p_sys->wf.nBlockAlign    = 4 * p_sys->wf.nChannels;
 232             i_fourcc                 = VLC_FOURCC( 't','w','o','s' );
 233             i_cat                    = AU_CAT_PCM;
 234             break;
 235
 236         case AU_FLOAT:         /* 32-bit IEEE floating point */
 237             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 238             p_sys->wf.wBitsPerSample = 32;
 239             p_sys->wf.nBlockAlign    = 4 * p_sys->wf.nChannels;
 240             i_fourcc                  = VLC_FOURCC( 'a', 'u', 0, AU_FLOAT );
 241             i_cat                    = AU_CAT_PCM;
 242             break;
 243
 244         case AU_DOUBLE:        /* 64-bit IEEE floating point */
 245             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 246             p_sys->wf.wBitsPerSample = 64;
 247             p_sys->wf.nBlockAlign    = 8 * p_sys->wf.nChannels;
 248             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_DOUBLE );
 249             i_cat                    = AU_CAT_PCM;
 250             break;
 251
 252         case AU_ADPCM_G721:    /* 4-bit CCITT g.721 ADPCM */
 253             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 254             p_sys->wf.wBitsPerSample = 0;
 255             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 256             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G721 );
 257             i_cat                    = AU_CAT_ADPCM;
 258             break;
 259
 260         case AU_ADPCM_G722:    /* CCITT g.722 ADPCM */
 261             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 262             p_sys->wf.wBitsPerSample = 0;
 263             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 264             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G722 );
 265             i_cat                    = AU_CAT_ADPCM;
 266             break;
 267
 268         case AU_ADPCM_G723_3:  /* CCITT g.723 3-bit ADPCM */
 269             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 270             p_sys->wf.wBitsPerSample = 0;
 271             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 272             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_3 );
 273             i_cat                    = AU_CAT_ADPCM;
 274             break;
 275
 276         case AU_ADPCM_G723_5:  /* CCITT g.723 5-bit ADPCM */
 277             p_sys->wf.wFormatTag     = WAVE_FORMAT_UNKNOWN;
 278             p_sys->wf.wBitsPerSample = 0;
 279             p_sys->wf.nBlockAlign    = 0 * p_sys->wf.nChannels;
 280             i_fourcc                 = VLC_FOURCC( 'a', 'u', 0, AU_ADPCM_G723_5 );
 281             i_cat                    = AU_CAT_ADPCM;
 282             break;
 283
 284         default:
 285             msg_Warn( p_input, "unknow encoding=0x%x", p_sys->au.i_encoding );
 286             i_cat                    = AU_CAT_UNKNOWN;
 287             goto error;
 288     }
 289     p_sys->wf.nAvgBytesPerSec        = p_sys->wf.nSamplesPerSec * p_sys->wf.nChannels * p_sys->wf.wBitsPerSample / 8;
 290
 291
 292
 293     if( i_cat == AU_CAT_UNKNOWN || i_cat == AU_CAT_ADPCM )
 294     {
 295         p_sys->i_frame_size = 0;
 296         p_sys->i_frame_length = 0;
 297
 298         msg_Err( p_input, "unsupported codec/type (Please report it)" );
 299         goto error;
 300     }
 301     else
 302     {
 303         int i_samples, i_modulo;
 304
 305         /* read samples for 50ms of */
 306         i_samples = __MAX( p_sys->wf.nSamplesPerSec / 20, 1 );
 307
 308         p_sys->i_frame_size = i_samples * p_sys->wf.nChannels * ( (p_sys->wf.wBitsPerSample + 7) / 8 );
 309
 310         if( p_sys->wf.nBlockAlign > 0 )
 311         {
 312             if( ( i_modulo = p_sys->i_frame_size % p_sys->wf.nBlockAlign ) != 0 )
 313             {
 314                 p_sys->i_frame_size += p_sys->wf.nBlockAlign - i_modulo;
 315             }
 316         }
 317
 318         p_sys->i_frame_length = (mtime_t)1000000 *
 319                                 (mtime_t)i_samples /
 320                                 (mtime_t)p_sys->wf.nSamplesPerSec;
 321
 322         p_input->pf_demux = DemuxPCM;
 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