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) 1998-2001,2003 VideoLAN
   5  * $Id: input_ext-intf.c,v 1.54 2003/12/22 14:32:56 sam Exp $
   6  *
   7  * Author: 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( p_input->stream.control.i_rate * 4 <= DEFAULT_RATE )
  75         {
  76             msg_Dbg( p_input, "can not play any faster" );
  77         }
  78         else
  79         {
  80             p_input->stream.i_new_status = FORWARD_S;
  81             p_input->stream.i_new_rate =
  82                                     p_input->stream.control.i_rate / 2;
  83
  84             if ( p_input->stream.i_new_rate < DEFAULT_RATE )
  85             {
  86                 msg_Dbg( p_input, "playing at %i:1 fast forward",
  87                      DEFAULT_RATE / p_input->stream.i_new_rate );
  88             }
  89             else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
  90             {
  91                 msg_Dbg( p_input, "playing at 1:%i slow motion",
  92                       p_input->stream.i_new_rate / DEFAULT_RATE );
  93             }
  94             else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
  95             {
  96                 p_input->stream.i_new_status = PLAYING_S;
  97                 msg_Dbg( p_input, "playing at normal rate" );
  98             }
  99         }
 100         break;
 101
 102     case INPUT_STATUS_SLOWER:
 103         if( p_input->stream.control.i_rate >= 8 * DEFAULT_RATE )
 104         {
 105             msg_Dbg( p_input, "can not play any slower" );
 106         }
 107         else
 108         {
 109             p_input->stream.i_new_status = FORWARD_S;
 110             p_input->stream.i_new_rate =
 111                                     p_input->stream.control.i_rate * 2;
 112
 113             if ( p_input->stream.i_new_rate < DEFAULT_RATE )
 114             {
 115                 msg_Dbg( p_input, "playing at %i:1 fast forward",
 116                      DEFAULT_RATE / p_input->stream.i_new_rate );
 117             }
 118             else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
 119             {
 120                 msg_Dbg( p_input, "playing at 1:%i slow motion",
 121                       p_input->stream.i_new_rate / DEFAULT_RATE );
 122             }
 123             else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
 124             {
 125                 p_input->stream.i_new_status = PLAYING_S;
 126                 msg_Dbg( p_input, "playing at normal rate" );
 127             }
 128         }
 129         break;
 130
 131     default:
 132         break;
 133     }
 134
 135     vlc_cond_signal( &p_input->stream.stream_wait );
 136     vlc_mutex_unlock( &p_input->stream.stream_lock );
 137
 138     vlc_object_release( p_input );
 139 }
 140
 141 void __input_SetRate( vlc_object_t * p_this, int i_rate )
 142 {
 143     input_thread_t *p_input;
 144
 145     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 146
 147     if( p_input == NULL )
 148     {
 149         msg_Err( p_this, "no input found" );
 150         return;
 151     }
 152
 153     vlc_mutex_lock( &p_input->stream.stream_lock );
 154
 155     if( i_rate * 8 < DEFAULT_RATE )
 156     {
 157         msg_Dbg( p_input, "can not play faster than 8x" );
 158         vlc_mutex_unlock( &p_input->stream.stream_lock );
 159         return;
 160     }
 161     if( i_rate > DEFAULT_RATE * 8 )
 162     {
 163         msg_Dbg( p_input, "can not play slower than 1/8x" );
 164         vlc_mutex_unlock( &p_input->stream.stream_lock );
 165         return;
 166     }
 167
 168     p_input->stream.i_new_status = FORWARD_S;
 169     p_input->stream.i_new_rate = i_rate;
 170
 171     if ( p_input->stream.i_new_rate < DEFAULT_RATE )
 172     {
 173         msg_Dbg( p_input, "playing at %i:1 fast forward",
 174              DEFAULT_RATE / p_input->stream.i_new_rate );
 175     }
 176     else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
 177     {
 178         msg_Dbg( p_input, "playing at 1:%i slow motion",
 179               p_input->stream.i_new_rate / DEFAULT_RATE );
 180     }
 181     else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
 182     {
 183         p_input->stream.i_new_status = PLAYING_S;
 184         msg_Dbg( p_input, "playing at normal rate" );
 185     }
 186
 187     vlc_cond_signal( &p_input->stream.stream_wait );
 188     vlc_mutex_unlock( &p_input->stream.stream_lock );
 189
 190     vlc_object_release( p_input );
 191 }
 192
 193 /*****************************************************************************
 194  * input_Seek: changes the stream postion
 195  *****************************************************************************/
 196 void __input_Seek( vlc_object_t * p_this, off_t i_position, int i_whence )
 197 {
 198     input_thread_t *p_input;
 199
 200     char psz_time1[MSTRTIME_MAX_SIZE];
 201     char psz_time2[MSTRTIME_MAX_SIZE];
 202
 203     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 204
 205     if( p_input == NULL )
 206     {
 207         msg_Err( p_this, "no input found" );
 208         return;
 209     }
 210
 211     vlc_mutex_lock( &p_input->stream.stream_lock );
 212
 213 #define A p_input->stream.p_selected_area
 214     switch( i_whence & 0x30 )
 215     {
 216         case INPUT_SEEK_SECONDS:
 217             i_position *= (off_t)50 * p_input->stream.i_mux_rate;
 218             break;
 219
 220         case INPUT_SEEK_PERCENT:
 221             i_position = A->i_size * i_position / (off_t)100;
 222             break;
 223
 224         case INPUT_SEEK_BYTES:
 225         default:
 226             break;
 227     }
 228
 229     switch( i_whence & 0x03 )
 230     {
 231         case INPUT_SEEK_CUR:
 232             A->i_seek = A->i_tell + i_position;
 233             break;
 234
 235         case INPUT_SEEK_END:
 236             A->i_seek = A->i_size + i_position;
 237             break;
 238
 239         case INPUT_SEEK_SET:
 240         default:
 241             A->i_seek = i_position;
 242             break;
 243     }
 244
 245     if( A->i_seek < 0 )
 246     {
 247         A->i_seek = 0;
 248     }
 249     else if( A->i_seek > A->i_size )
 250     {
 251         A->i_seek = A->i_size;
 252     }
 253
 254     msg_Dbg( p_input, "seeking position "I64Fd"/"I64Fd" (%s/%s)",
 255              A->i_seek, A->i_size,
 256              input_OffsetToTime( p_input, psz_time1, i_position ),
 257              input_OffsetToTime( p_input, psz_time2, A->i_size ) );
 258 #undef A
 259
 260     vlc_cond_signal( &p_input->stream.stream_wait );
 261     vlc_mutex_unlock( &p_input->stream.stream_lock );
 262
 263     vlc_object_release( p_input );
 264 }
 265
 266 /*****************************************************************************
 267  * input_Tell: requests the stream postion
 268  *****************************************************************************/
 269 void __input_Tell( vlc_object_t * p_this, stream_position_t * p_position )
 270 {
 271     input_thread_t *p_input;
 272
 273     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 274
 275     if( p_input == NULL )
 276     {
 277         p_position->i_tell = 0;
 278         p_position->i_size = 0;
 279         p_position->i_mux_rate = 0;
 280         msg_Err( p_this, "no input found" );
 281         return;
 282     }
 283
 284     vlc_mutex_lock( &p_input->stream.stream_lock );
 285
 286 #define A p_input->stream.p_selected_area
 287     p_position->i_tell = A->i_tell;
 288     p_position->i_size = A->i_size;
 289     p_position->i_mux_rate = p_input->stream.i_mux_rate;
 290 #undef A
 291
 292     vlc_mutex_unlock( &p_input->stream.stream_lock );
 293     vlc_object_release( p_input );
 294 }
 295
 296 /*****************************************************************************
 297  * input_OffsetToTime : converts an off_t value to a time indicator, using
 298  *                      mux_rate
 299  *****************************************************************************
 300  * BEWARE : this function assumes that you already own the lock on
 301  * p_input->stream.stream_lock
 302  *****************************************************************************/
 303 char * input_OffsetToTime( input_thread_t * p_input, char * psz_buffer,
 304                            off_t i_offset )
 305 {
 306     mtime_t         i_seconds;
 307
 308     if( p_input->stream.i_mux_rate )
 309     {
 310         i_seconds = i_offset / 50 / p_input->stream.i_mux_rate;
 311         return secstotimestr( psz_buffer, i_seconds );
 312     }
 313     else
 314     {
 315         /* Divide by zero is not my friend. */
 316         sprintf( psz_buffer, "-:--:--" );
 317         return( psz_buffer );
 318     }
 319 }
 320
 321 /*****************************************************************************
 322  * input_DumpStream: dumps the contents of a stream descriptor
 323  *****************************************************************************
 324  * BEWARE : this function assumes that you already own the lock on
 325  * p_input->stream.stream_lock
 326  *****************************************************************************/
 327 void input_DumpStream( input_thread_t * p_input )
 328 {
 329     char psz_time1[MSTRTIME_MAX_SIZE];
 330     char psz_time2[MSTRTIME_MAX_SIZE];
 331     unsigned int i, j;
 332
 333 #define S   p_input->stream
 334     msg_Dbg( p_input, "dumping stream ID 0x%x [OK:%ld/D:%ld]", S.i_stream_id,
 335              S.c_packets_read, S.c_packets_trashed );
 336     if( S.b_seekable )
 337         msg_Dbg( p_input, "seekable stream, position: "I64Fd"/"I64Fd" (%s/%s)",
 338                  S.p_selected_area->i_tell, S.p_selected_area->i_size,
 339                  input_OffsetToTime( p_input, psz_time1,
 340                                      S.p_selected_area->i_tell ),
 341                  input_OffsetToTime( p_input, psz_time2,
 342                                      S.p_selected_area->i_size ) );
 343     else
 344         msg_Dbg( p_input, "pace %scontrolled", S.b_pace_control ? "" : "un-" );
 345 #undef S
 346     for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
 347     {
 348 #define P   p_input->stream.pp_programs[i]
 349         msg_Dbg( p_input, "dumping program 0x%x, version %d (%s)",
 350                  P->i_number, P->i_version,
 351                  P->b_is_ok ? "complete" : "partial" );
 352 #undef P
 353         for( j = 0; j < p_input->stream.pp_programs[i]->i_es_number; j++ )
 354         {
 355 #define ES  p_input->stream.pp_programs[i]->pp_es[j]
 356             msg_Dbg( p_input, "ES 0x%x, "
 357                      "stream 0x%x, fourcc `%4.4s', %s [OK:%ld/ERR:%ld]",
 358                      ES->i_id, ES->i_stream_id, (char*)&ES->i_fourcc,
 359                      ES->p_dec != NULL ? "selected" : "not selected",
 360                      ES->c_packets, ES->c_invalid_packets );
 361 #undef ES
 362         }
 363     }
 364 }
 365
 366 /*****************************************************************************
 367  * input_ToggleES: answers to a user request with calls to (Un)SelectES
 368  *****************************************************************************
 369  * Useful since the interface plugins know p_es.
 370  * It only works for audio & spu ( to be sure nothing nasty is being done ).
 371  * b_select is a boolean to know if we have to select or unselect ES
 372  *****************************************************************************/
 373 int input_ToggleES( input_thread_t * p_input, es_descriptor_t * p_es,
 374                     vlc_bool_t b_select )
 375 {
 376     vlc_mutex_lock( &p_input->stream.stream_lock );
 377
 378     if( p_es != NULL )
 379     {
 380         if( b_select )
 381         {
 382             p_input->stream.p_newly_selected_es = p_es;
 383         }
 384         else
 385         {
 386             p_input->stream.p_removed_es = p_es;
 387         }
 388     }
 389
 390     vlc_mutex_unlock( &p_input->stream.stream_lock );
 391
 392     return 0;
 393 }
 394
 395 /****************************************************************************
 396  * input_ChangeArea: interface request an area change
 397  ****************************************************************************/
 398 int input_ChangeArea( input_thread_t * p_input, input_area_t * p_area )
 399 {
 400     vlc_mutex_lock( &p_input->stream.stream_lock );
 401
 402     p_input->stream.p_new_area = p_area;
 403
 404     vlc_mutex_unlock( &p_input->stream.stream_lock );
 405
 406     return 0;
 407 }
 408
 409 /****************************************************************************
 410  * input_ChangeProgram: interface request a program change
 411  ****************************************************************************/
 412 int input_ChangeProgram( input_thread_t * p_input, uint16_t i_program_number )
 413 {
 414     pgrm_descriptor_t *       p_program;
 415     vlc_value_t val;
 416
 417     vlc_mutex_lock( &p_input->stream.stream_lock );
 418
 419     p_program = input_FindProgram( p_input, i_program_number );
 420
 421     if ( p_program == NULL )
 422     {
 423         msg_Err( p_input, "could not find selected program" );
 424         return -1;
 425     }
 426
 427     p_input->stream.p_new_program = p_program;
 428
 429     vlc_mutex_unlock( &p_input->stream.stream_lock );
 430
 431     /* Update the navigation variables without triggering a callback */
 432     val.i_int = i_program_number;
 433     var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );
 434
 435     return 0;
 436 }
 437
 438 /****************************************************************************
 439  * input_ToggleGrayscale: change to grayscale or color output
 440  ****************************************************************************/
 441 int input_ToggleGrayscale( input_thread_t * p_input )
 442 {
 443     /* No need to warn the input thread since only the decoders and outputs
 444      * worry about it. */
 445     vlc_mutex_lock( &p_input->stream.control.control_lock );
 446     p_input->stream.control.b_grayscale =
 447                     !p_input->stream.control.b_grayscale;
 448
 449     msg_Dbg( p_input, "changing to %s output",
 450              p_input->stream.control.b_grayscale ? "grayscale" : "color" );
 451
 452     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 453
 454     return 0;
 455 }
 456
 457 /****************************************************************************
 458  * input_ToggleMute: activate/deactivate mute mode
 459  ****************************************************************************/
 460 int input_ToggleMute( input_thread_t * p_input )
 461 {
 462     /* We need to feed the decoders with 0, and only input can do that, so
 463      * pass the message to the input thread. */
 464     vlc_mutex_lock( &p_input->stream.stream_lock );
 465     p_input->stream.b_new_mute = !p_input->stream.control.b_mute;
 466
 467     msg_Dbg( p_input, "%s mute mode",
 468              p_input->stream.control.b_mute ? "activating" : "deactivating" );
 469
 470     vlc_mutex_unlock( &p_input->stream.stream_lock );
 471
 472     return 0;
 473 }
 474