git.sesse.net Git - vlc/blob - src/input/demux.c

   1 /*****************************************************************************
   2  * demux.c
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VideoLAN
   5  * $Id: demux.c,v 1.13 2004/03/03 20:39:53 gbazin Exp $
   6  *
   7  * Author: 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 #include <stdlib.h>
  25 #include <vlc/vlc.h>
  26 #include <vlc/input.h>
  27
  28 #include "ninput.h"
  29
  30 int demux_vaControl( input_thread_t *p_input, int i_query, va_list args )
  31 {
  32     if( p_input->pf_demux_control )
  33     {
  34         return p_input->pf_demux_control( p_input, i_query, args );
  35     }
  36     return VLC_EGENERIC;
  37 }
  38
  39 int demux_Control( input_thread_t *p_input, int i_query, ...  )
  40 {
  41     va_list args;
  42     int     i_result;
  43
  44     va_start( args, i_query );
  45     i_result = demux_vaControl( p_input, i_query, args );
  46     va_end( args );
  47
  48     return i_result;
  49 }
  50
  51 static void SeekOffset( input_thread_t *p_input, int64_t i_pos );
  52
  53 int demux_vaControlDefault( input_thread_t *p_input, int i_query,
  54                             va_list args )
  55 {
  56     int     i_ret;
  57     double  f, *pf;
  58     int64_t i64, *pi64;
  59
  60     vlc_mutex_lock( &p_input->stream.stream_lock );
  61     switch( i_query )
  62     {
  63         case DEMUX_GET_POSITION:
  64             pf = (double*)va_arg( args, double * );
  65             if( p_input->stream.p_selected_area->i_size <= 0 )
  66             {
  67                 *pf = 0.0;
  68             }
  69             else
  70             {
  71                 *pf = (double)p_input->stream.p_selected_area->i_tell /
  72                       (double)p_input->stream.p_selected_area->i_size;
  73             }
  74             i_ret = VLC_SUCCESS;
  75             break;
  76
  77         case DEMUX_SET_POSITION:
  78             f = (double)va_arg( args, double );
  79             if( p_input->stream.b_seekable && p_input->pf_seek != NULL &&
  80                 f >= 0.0 && f <= 1.0 )
  81             {
  82                 SeekOffset( p_input, (int64_t)(f *
  83                             (double)p_input->stream.p_selected_area->i_size) );
  84                 i_ret = VLC_SUCCESS;
  85             }
  86             else
  87             {
  88                 i_ret = VLC_EGENERIC;
  89             }
  90             break;
  91
  92         case DEMUX_GET_TIME:
  93             pi64 = (int64_t*)va_arg( args, int64_t * );
  94             if( p_input->stream.i_mux_rate > 0 )
  95             {
  96                 *pi64 = (int64_t)1000000 *
  97                         ( p_input->stream.p_selected_area->i_tell / 50 ) /
  98                         p_input->stream.i_mux_rate;
  99                 i_ret = VLC_SUCCESS;
 100             }
 101             else
 102             {
 103                 *pi64 = 0;
 104                 i_ret = VLC_EGENERIC;
 105             }
 106             break;
 107
 108         case DEMUX_SET_TIME:
 109             i64 = (int64_t)va_arg( args, int64_t );
 110             if( p_input->stream.i_mux_rate > 0 &&
 111                 p_input->stream.b_seekable &&
 112                 p_input->pf_seek != NULL && i64 >= 0 )
 113             {
 114                 SeekOffset( p_input, i64 * 50 *
 115                                      (int64_t)p_input->stream.i_mux_rate /
 116                                      (int64_t)1000000 );
 117                 i_ret = VLC_SUCCESS;
 118             }
 119             else
 120             {
 121                 i_ret = VLC_EGENERIC;
 122             }
 123             break;
 124
 125         case DEMUX_GET_LENGTH:
 126             pi64 = (int64_t*)va_arg( args, int64_t * );
 127             if( p_input->stream.i_mux_rate > 0 )
 128             {
 129                 *pi64 = (int64_t)1000000 *
 130                         ( p_input->stream.p_selected_area->i_size / 50 ) /
 131                         p_input->stream.i_mux_rate;
 132                 i_ret = VLC_SUCCESS;
 133             }
 134             else
 135             {
 136                 *pi64 = 0;
 137                 i_ret = VLC_EGENERIC;
 138             }
 139             break;
 140         case DEMUX_GET_FPS:
 141             i_ret = VLC_EGENERIC;
 142             break;
 143         case DEMUX_GET_META:
 144             i_ret = VLC_EGENERIC;
 145             break;
 146
 147         default:
 148             msg_Err( p_input, "unknown query in demux_vaControlDefault" );
 149             i_ret = VLC_EGENERIC;
 150             break;
 151     }
 152     vlc_mutex_unlock( &p_input->stream.stream_lock );
 153
 154     return i_ret;
 155 }
 156
 157 static void SeekOffset( input_thread_t *p_input, int64_t i_pos )
 158 {
 159     /* Reinitialize buffer manager. */
 160     input_AccessReinit( p_input );
 161
 162     vlc_mutex_unlock( &p_input->stream.stream_lock );
 163     p_input->pf_seek( p_input, i_pos );
 164     vlc_mutex_lock( &p_input->stream.stream_lock );
 165 }
 166
 167
 168 /*****************************************************************************
 169  * demux2_New:
 170  *****************************************************************************/
 171 demux_t *__demux2_New( vlc_object_t *p_obj,
 172                        char *psz_mrl, stream_t *s, es_out_t *out )
 173 {
 174     demux_t *p_demux = vlc_object_create( p_obj, sizeof( demux_t ) );
 175
 176     char    *psz_dup = strdup( psz_mrl ? psz_mrl : "" );
 177     char    *psz = strchr( psz_dup, ':' );
 178
 179     if( p_demux == NULL )
 180     {
 181         free( psz_dup );
 182         return NULL;
 183     }
 184
 185     /* Parse URL */
 186     p_demux->psz_access = NULL;
 187     p_demux->psz_demux  = NULL;
 188     p_demux->psz_path   = NULL;
 189
 190     if( psz )
 191     {
 192         *psz++ = '\0';
 193
 194         if( psz[0] == '/' && psz[1] == '/' )
 195         {
 196             psz += 2;
 197         }
 198         p_demux->psz_path = strdup( psz );
 199
 200         psz = strchr( psz_dup, '/' );
 201         if( psz )
 202         {
 203             *psz++ = '\0';
 204             p_demux->psz_access = strdup( psz_dup );
 205             p_demux->psz_demux  = strdup( psz );
 206         }
 207     }
 208     else
 209     {
 210         p_demux->psz_path = strdup( psz_mrl );
 211     }
 212     free( psz_dup );
 213
 214
 215     if( p_demux->psz_access == NULL )
 216     {
 217         p_demux->psz_access = strdup( "" );
 218     }
 219     if( p_demux->psz_demux == NULL )
 220     {
 221         p_demux->psz_demux = strdup( "" );
 222     }
 223     if( p_demux->psz_path == NULL )
 224     {
 225         p_demux->psz_path = strdup( "" );
 226     }
 227     msg_Dbg( p_obj, "demux2_New: '%s' -> access='%s' demux='%s' path='%s'",
 228              psz_mrl,
 229              p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
 230
 231     p_demux->s          = s;
 232     p_demux->out        = out;
 233
 234     p_demux->pf_demux   = NULL;
 235     p_demux->pf_control = NULL;
 236     p_demux->p_sys      = NULL;
 237
 238     /* Before module_Need (for var_Create...) */
 239     vlc_object_attach( p_demux, p_obj );
 240
 241     p_demux->p_module =
 242         module_Need( p_demux, "demux2", p_demux->psz_demux, VLC_TRUE );
 243     if( p_demux->p_module == NULL )
 244     {
 245         vlc_object_detach( p_demux );
 246         free( p_demux->psz_path );
 247         free( p_demux->psz_demux );
 248         free( p_demux->psz_access );
 249         vlc_object_destroy( p_demux );
 250         return NULL;
 251     }
 252
 253     return p_demux;
 254 }
 255
 256 /*****************************************************************************
 257  * demux2_Delete:
 258  *****************************************************************************/
 259 void demux2_Delete( demux_t *p_demux )
 260 {
 261     module_Unneed( p_demux, p_demux->p_module );
 262     vlc_object_detach( p_demux );
 263
 264     free( p_demux->psz_path );
 265     free( p_demux->psz_demux );
 266     free( p_demux->psz_access );
 267
 268     vlc_object_destroy( p_demux );
 269 }
 270
 271 /*****************************************************************************
 272  * demux2_vaControlHelper:
 273  *****************************************************************************/
 274 int demux2_vaControlHelper( stream_t *s,
 275                             int64_t i_start, int64_t i_end,
 276                             int i_bitrate, int i_align,
 277                             int i_query, va_list args )
 278 {
 279     int64_t i_tell;
 280     double  f, *pf;
 281     int64_t i64, *pi64;
 282
 283     if( i_end < 0 )    i_end   = stream_Size( s );
 284     if( i_start < 0 )  i_start = 0;
 285     if( i_align <= 0 ) i_align = 1;
 286     i_tell = stream_Tell( s );
 287
 288     switch( i_query )
 289     {
 290         case DEMUX_GET_LENGTH:
 291             pi64 = (int64_t*)va_arg( args, int64_t * );
 292             if( i_bitrate > 0 && i_end > i_start )
 293             {
 294                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 295                 return VLC_SUCCESS;
 296             }
 297             return VLC_EGENERIC;
 298
 299         case DEMUX_GET_TIME:
 300             pi64 = (int64_t*)va_arg( args, int64_t * );
 301             if( i_bitrate > 0 && i_end > i_start )
 302             {
 303                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 304                 return VLC_SUCCESS;
 305             }
 306             return VLC_EGENERIC;
 307
 308         case DEMUX_GET_POSITION:
 309             pf = (double*)va_arg( args, double * );
 310             if( i_start < i_end )
 311             {
 312                 *pf = (double)( i_tell - i_start ) /
 313                       (double)( i_end  - i_start );
 314                 return VLC_SUCCESS;
 315             }
 316             return VLC_EGENERIC;
 317
 318
 319         case DEMUX_SET_POSITION:
 320             f = (double)va_arg( args, double );
 321             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 322             {
 323                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 324
 325                 if( stream_Seek( s, i_start + i_block * i_align ) )
 326                 {
 327                     return VLC_EGENERIC;
 328                 }
 329                 return VLC_SUCCESS;
 330             }
 331             return VLC_EGENERIC;
 332
 333         case DEMUX_SET_TIME:
 334             i64 = (int64_t)va_arg( args, int64_t );
 335             if( i_bitrate > 0 && i64 >= 0 )
 336             {
 337                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 338                 if( stream_Seek( s, i_start + i_block * i_align ) )
 339                 {
 340                     return VLC_EGENERIC;
 341                 }
 342                 return VLC_SUCCESS;
 343             }
 344             return VLC_EGENERIC;
 345
 346         case DEMUX_GET_FPS:
 347         case DEMUX_GET_META:
 348             return VLC_EGENERIC;
 349
 350         default:
 351             msg_Err( s, "unknown query in demux_vaControlDefault" );
 352             return VLC_EGENERIC;
 353     }
 354 }
 355