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

   1 /*****************************************************************************
   2  * input_ext-intf.c: services to the interface
   3  *****************************************************************************
   4  * Copyright (C) 1998-2001 VideoLAN
   5  * $Id: input_ext-intf.c,v 1.49 2003/05/04 22:42:17 gbazin Exp $
   6  *
   7  * Authors: Christophe Massiot <massiot@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 <string.h>                                    /* memcpy(), memset() */
  28
  29 #include <vlc/vlc.h>
  30
  31 #include "stream_control.h"
  32 #include "input_ext-dec.h"
  33 #include "input_ext-intf.h"
  34 #include "input_ext-plugins.h"
  35
  36 /*****************************************************************************
  37  * input_SetStatus: change the reading status
  38  *****************************************************************************/
  39 void __input_SetStatus( vlc_object_t * p_this, int i_mode )
  40 {
  41     input_thread_t *p_input;
  42
  43     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
  44
  45     if( p_input == NULL )
  46     {
  47         msg_Err( p_this, "no input found" );
  48         return;
  49     }
  50
  51     vlc_mutex_lock( &p_input->stream.stream_lock );
  52
  53     switch( i_mode )
  54     {
  55     case INPUT_STATUS_END:
  56         p_input->stream.i_new_status = PLAYING_S;
  57         p_input->b_eof = 1;
  58         msg_Dbg( p_input, "end of stream" );
  59         break;
  60
  61     case INPUT_STATUS_PLAY:
  62         p_input->stream.i_new_status = PLAYING_S;
  63         msg_Dbg( p_input, "playing at normal rate" );
  64         break;
  65
  66     case INPUT_STATUS_PAUSE:
  67         /* XXX: we don't need to check i_status, because input_clock.c
  68          * does it for us */
  69         p_input->stream.i_new_status = PAUSE_S;
  70         msg_Dbg( p_input, "toggling pause" );
  71         break;
  72
  73     case INPUT_STATUS_FASTER:
  74         /* If we are already going too fast, go back to default rate */
  75         if( p_input->stream.control.i_rate * 8 <= DEFAULT_RATE )
  76         {
  77             msg_Dbg( p_input, "can not play any faster" );
  78         }
  79         else
  80         {
  81             p_input->stream.i_new_status = FORWARD_S;
  82             p_input->stream.i_new_rate =
  83                                     p_input->stream.control.i_rate / 2;
  84
  85             if ( p_input->stream.i_new_rate < DEFAULT_RATE )
  86             {
  87                 msg_Dbg( p_input, "playing at %i:1 fast forward",
  88                      DEFAULT_RATE / p_input->stream.i_new_rate );
  89             }
  90             else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
  91             {
  92                 msg_Dbg( p_input, "playing at 1:%i slow motion",
  93                       p_input->stream.i_new_rate / DEFAULT_RATE );
  94             }
  95             else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
  96             {
  97                 p_input->stream.i_new_status = PLAYING_S;
  98                 msg_Dbg( p_input, "playing at normal rate" );
  99             }
 100         }
 101         break;
 102
 103     case INPUT_STATUS_SLOWER:
 104         /* If we are already going too slow, go back to default rate */
 105         if( p_input->stream.control.i_rate >= 8 * DEFAULT_RATE )
 106         {
 107             msg_Dbg( p_input, "can not play any slower" );
 108         }
 109         else
 110         {
 111             p_input->stream.i_new_status = FORWARD_S;
 112             p_input->stream.i_new_rate =
 113                                     p_input->stream.control.i_rate * 2;
 114
 115             if ( p_input->stream.i_new_rate < DEFAULT_RATE )
 116             {
 117                 msg_Dbg( p_input, "playing at %i:1 fast forward",
 118                      DEFAULT_RATE / p_input->stream.i_new_rate );
 119             }
 120             else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
 121             {
 122                 msg_Dbg( p_input, "playing at 1:%i slow motion",
 123                       p_input->stream.i_new_rate / DEFAULT_RATE );
 124             }
 125             else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
 126             {
 127                 p_input->stream.i_new_status = PLAYING_S;
 128                 msg_Dbg( p_input, "playing at normal rate" );
 129             }
 130         }
 131         break;
 132
 133     default:
 134         break;
 135     }
 136
 137     vlc_cond_signal( &p_input->stream.stream_wait );
 138     vlc_mutex_unlock( &p_input->stream.stream_lock );
 139
 140     vlc_object_release( p_input );
 141 }
 142
 143 /*****************************************************************************
 144  * input_Seek: changes the stream postion
 145  *****************************************************************************/
 146 void __input_Seek( vlc_object_t * p_this, off_t i_position, int i_whence )
 147 {
 148     input_thread_t *p_input;
 149
 150     char psz_time1[OFFSETTOTIME_MAX_SIZE];
 151     char psz_time2[OFFSETTOTIME_MAX_SIZE];
 152
 153     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 154
 155     if( p_input == NULL )
 156     {
 157         msg_Err( p_this, "no input found" );
 158         return;
 159     }
 160
 161     vlc_mutex_lock( &p_input->stream.stream_lock );
 162
 163 #define A p_input->stream.p_selected_area
 164     switch( i_whence & 0x30 )
 165     {
 166         case INPUT_SEEK_SECONDS:
 167             i_position *= (off_t)50 * p_input->stream.i_mux_rate;
 168             break;
 169
 170         case INPUT_SEEK_PERCENT:
 171             i_position = A->i_size * i_position / (off_t)100;
 172             break;
 173
 174         case INPUT_SEEK_BYTES:
 175         default:
 176             break;
 177     }
 178
 179     switch( i_whence & 0x03 )
 180     {
 181         case INPUT_SEEK_CUR:
 182             A->i_seek = A->i_tell + i_position;
 183             break;
 184
 185         case INPUT_SEEK_END:
 186             A->i_seek = A->i_size + i_position;
 187             break;
 188
 189         case INPUT_SEEK_SET:
 190         default:
 191             A->i_seek = i_position;
 192             break;
 193     }
 194
 195     if( A->i_seek < 0 )
 196     {
 197         A->i_seek = 0;
 198     }
 199     else if( A->i_seek > A->i_size )
 200     {
 201         A->i_seek = A->i_size;
 202     }
 203
 204     msg_Dbg( p_input, "seeking position "I64Fd"/"I64Fd" (%s/%s)",
 205              A->i_seek, A->i_size,
 206              input_OffsetToTime( p_input, psz_time1, i_position ),
 207              input_OffsetToTime( p_input, psz_time2, A->i_size ) );
 208 #undef A
 209
 210     vlc_cond_signal( &p_input->stream.stream_wait );
 211     vlc_mutex_unlock( &p_input->stream.stream_lock );
 212
 213     vlc_object_release( p_input );
 214 }
 215
 216 /*****************************************************************************
 217  * input_Tell: requests the stream postion
 218  *****************************************************************************/
 219 void __input_Tell( vlc_object_t * p_this, stream_position_t * p_position )
 220 {
 221     input_thread_t *p_input;
 222
 223     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 224
 225     if( p_input == NULL )
 226     {
 227         p_position->i_tell = 0;
 228         p_position->i_size = 0;
 229         p_position->i_mux_rate = 0;
 230         msg_Err( p_this, "no input found" );
 231         return;
 232     }
 233
 234     vlc_mutex_lock( &p_input->stream.stream_lock );
 235
 236 #define A p_input->stream.p_selected_area
 237     p_position->i_tell = A->i_tell;
 238     p_position->i_size = A->i_size;
 239     p_position->i_mux_rate = p_input->stream.i_mux_rate;
 240 #undef A
 241
 242     vlc_mutex_unlock( &p_input->stream.stream_lock );
 243     vlc_object_release( p_input );
 244 }
 245
 246 /*****************************************************************************
 247  * input_OffsetToTime : converts an off_t value to a time indicator, using
 248  *                      mux_rate
 249  *****************************************************************************
 250  * BEWARE : this function assumes that you already own the lock on
 251  * p_input->stream.stream_lock
 252  *****************************************************************************/
 253 char * input_OffsetToTime( input_thread_t * p_input, char * psz_buffer,
 254                            off_t i_offset )
 255 {
 256     mtime_t         i_seconds;
 257
 258     if( p_input->stream.i_mux_rate )
 259     {
 260         i_seconds = i_offset / 50 / p_input->stream.i_mux_rate;
 261         snprintf( psz_buffer, OFFSETTOTIME_MAX_SIZE, "%d:%02d:%02d",
 262                  (int) (i_seconds / (60 * 60)),
 263                  (int) (i_seconds / 60 % 60),
 264                  (int) (i_seconds % 60) );
 265         return( psz_buffer );
 266     }
 267     else
 268     {
 269         /* Divide by zero is not my friend. */
 270         sprintf( psz_buffer, "-:--:--" );
 271         return( psz_buffer );
 272     }
 273 }
 274
 275 /*****************************************************************************
 276  * input_DumpStream: dumps the contents of a stream descriptor
 277  *****************************************************************************
 278  * BEWARE : this function assumes that you already own the lock on
 279  * p_input->stream.stream_lock
 280  *****************************************************************************/
 281 void input_DumpStream( input_thread_t * p_input )
 282 {
 283     char psz_time1[OFFSETTOTIME_MAX_SIZE];
 284     char psz_time2[OFFSETTOTIME_MAX_SIZE];
 285     unsigned int i, j;
 286
 287 #define S   p_input->stream
 288     msg_Dbg( p_input, "dumping stream ID 0x%x [OK:%ld/D:%ld]", S.i_stream_id,
 289              S.c_packets_read, S.c_packets_trashed );
 290     if( S.b_seekable )
 291         msg_Dbg( p_input, "seekable stream, position: "I64Fd"/"I64Fd" (%s/%s)",
 292                  S.p_selected_area->i_tell, S.p_selected_area->i_size,
 293                  input_OffsetToTime( p_input, psz_time1,
 294                                      S.p_selected_area->i_tell ),
 295                  input_OffsetToTime( p_input, psz_time2,
 296                                      S.p_selected_area->i_size ) );
 297     else
 298         msg_Dbg( p_input, "pace %scontrolled", S.b_pace_control ? "" : "un-" );
 299 #undef S
 300     for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
 301     {
 302 #define P   p_input->stream.pp_programs[i]
 303         msg_Dbg( p_input, "dumping program 0x%x, version %d (%s)",
 304                  P->i_number, P->i_version,
 305                  P->b_is_ok ? "complete" : "partial" );
 306 #undef P
 307         for( j = 0; j < p_input->stream.pp_programs[i]->i_es_number; j++ )
 308         {
 309 #define ES  p_input->stream.pp_programs[i]->pp_es[j]
 310             msg_Dbg( p_input, "ES 0x%x, "
 311                      "stream 0x%x, fourcc `%4.4s', %s [OK:%ld/ERR:%ld]",
 312                      ES->i_id, ES->i_stream_id, (char*)&ES->i_fourcc,
 313                      ES->p_decoder_fifo != NULL ? "selected" : "not selected",
 314                      ES->c_packets, ES->c_invalid_packets );
 315 #undef ES
 316         }
 317     }
 318 }
 319
 320 /*****************************************************************************
 321  * input_ToggleES: answers to a user request with calls to (Un)SelectES
 322  *****************************************************************************
 323  * Useful since the interface plugins know p_es.
 324  * It only works for audio & spu ( to be sure nothing nasty is being done ).
 325  * b_select is a boolean to know if we have to select or unselect ES
 326  *****************************************************************************/
 327 int input_ToggleES( input_thread_t * p_input, es_descriptor_t * p_es,
 328                     vlc_bool_t b_select )
 329 {
 330     vlc_mutex_lock( &p_input->stream.stream_lock );
 331
 332     if( p_es != NULL )
 333     {
 334         if( b_select )
 335         {
 336             p_input->stream.p_newly_selected_es = p_es;
 337         }
 338         else
 339         {
 340             p_input->stream.p_removed_es = p_es;
 341         }
 342     }
 343
 344     vlc_mutex_unlock( &p_input->stream.stream_lock );
 345
 346     return 0;
 347 }
 348
 349 /****************************************************************************
 350  * input_ChangeArea: interface request an area change
 351  ****************************************************************************/
 352 int input_ChangeArea( input_thread_t * p_input, input_area_t * p_area )
 353 {
 354     vlc_mutex_lock( &p_input->stream.stream_lock );
 355
 356     p_input->stream.p_new_area = p_area;
 357
 358     vlc_mutex_unlock( &p_input->stream.stream_lock );
 359
 360     return 0;
 361 }
 362
 363 /****************************************************************************
 364  * input_ChangeProgram: interface request a program change
 365  ****************************************************************************/
 366 int input_ChangeProgram( input_thread_t * p_input, uint16_t i_program_number )
 367 {
 368     pgrm_descriptor_t *       p_program;
 369     vlc_value_t val;
 370
 371     vlc_mutex_lock( &p_input->stream.stream_lock );
 372
 373     p_program = input_FindProgram( p_input, i_program_number );
 374
 375     if ( p_program == NULL )
 376     {
 377         msg_Err( p_input, "could not find selected program" );
 378         return -1;
 379     }
 380
 381     p_input->stream.p_new_program = p_program;
 382
 383     vlc_mutex_unlock( &p_input->stream.stream_lock );
 384
 385     /* Update the navigation variables without triggering a callback */
 386     val.i_int = i_program_number;
 387     var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );
 388
 389     return 0;
 390 }
 391
 392 /****************************************************************************
 393  * input_ToggleGrayscale: change to grayscale or color output
 394  ****************************************************************************/
 395 int input_ToggleGrayscale( input_thread_t * p_input )
 396 {
 397     /* No need to warn the input thread since only the decoders and outputs
 398      * worry about it. */
 399     vlc_mutex_lock( &p_input->stream.control.control_lock );
 400     p_input->stream.control.b_grayscale =
 401                     !p_input->stream.control.b_grayscale;
 402
 403     msg_Dbg( p_input, "changing to %s output",
 404              p_input->stream.control.b_grayscale ? "grayscale" : "color" );
 405
 406     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 407
 408     return 0;
 409 }
 410
 411 /****************************************************************************
 412  * input_ToggleMute: activate/deactivate mute mode
 413  ****************************************************************************/
 414 int input_ToggleMute( input_thread_t * p_input )
 415 {
 416     /* We need to feed the decoders with 0, and only input can do that, so
 417      * pass the message to the input thread. */
 418     vlc_mutex_lock( &p_input->stream.stream_lock );
 419     p_input->stream.b_new_mute = !p_input->stream.control.b_mute;
 420
 421     msg_Dbg( p_input, "%s mute mode",
 422              p_input->stream.control.b_mute ? "activating" : "deactivating" );
 423
 424     vlc_mutex_unlock( &p_input->stream.stream_lock );
 425
 426     return 0;
 427 }
 428