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) 1998-2004 VideoLAN
   5  * $Id: input_ext-intf.c,v 1.56 2004/01/25 17:16:05 zorglub 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     p_input->stream.i_new_status = FORWARD_S;
 168     p_input->stream.i_new_rate = i_rate;
 169
 170     if ( p_input->stream.i_new_rate < DEFAULT_RATE )
 171     {
 172         msg_Dbg( p_input, "playing at %i:1 fast forward",
 173              DEFAULT_RATE / p_input->stream.i_new_rate );
 174     }
 175     else if ( p_input->stream.i_new_rate > DEFAULT_RATE )
 176     {
 177         msg_Dbg( p_input, "playing at 1:%i slow motion",
 178               p_input->stream.i_new_rate / DEFAULT_RATE );
 179     }
 180     else if ( p_input->stream.i_new_rate == DEFAULT_RATE )
 181     {
 182         p_input->stream.i_new_status = PLAYING_S;
 183         msg_Dbg( p_input, "playing at normal rate" );
 184     }
 185
 186     vlc_cond_signal( &p_input->stream.stream_wait );
 187     vlc_mutex_unlock( &p_input->stream.stream_lock );
 188
 189     vlc_object_release( p_input );
 190 }
 191
 192 /*****************************************************************************
 193  * input_Seek: changes the stream postion
 194  *****************************************************************************/
 195 void __input_Seek( vlc_object_t * p_this, off_t i_position, int i_whence )
 196 {
 197     input_thread_t *p_input;
 198
 199     char psz_time1[MSTRTIME_MAX_SIZE];
 200     char psz_time2[MSTRTIME_MAX_SIZE];
 201
 202     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 203
 204     if( p_input == NULL )
 205     {
 206         msg_Err( p_this, "no input found" );
 207         return;
 208     }
 209
 210     vlc_mutex_lock( &p_input->stream.stream_lock );
 211
 212 #define A p_input->stream.p_selected_area
 213     switch( i_whence & 0x30 )
 214     {
 215         case INPUT_SEEK_SECONDS:
 216             i_position *= (off_t)50 * p_input->stream.i_mux_rate;
 217             break;
 218
 219         case INPUT_SEEK_PERCENT:
 220             i_position = A->i_size * i_position / (off_t)100;
 221             break;
 222
 223         case INPUT_SEEK_BYTES:
 224         default:
 225             break;
 226     }
 227
 228     switch( i_whence & 0x03 )
 229     {
 230         case INPUT_SEEK_CUR:
 231             A->i_seek = A->i_tell + i_position;
 232             break;
 233
 234         case INPUT_SEEK_END:
 235             A->i_seek = A->i_size + i_position;
 236             break;
 237
 238         case INPUT_SEEK_SET:
 239         default:
 240             A->i_seek = i_position;
 241             break;
 242     }
 243
 244     if( A->i_seek < 0 )
 245     {
 246         A->i_seek = 0;
 247     }
 248     else if( A->i_seek > A->i_size )
 249     {
 250         A->i_seek = A->i_size;
 251     }
 252
 253     msg_Dbg( p_input, "seeking position "I64Fd"/"I64Fd" (%s/%s)",
 254              A->i_seek, A->i_size,
 255              input_OffsetToTime( p_input, psz_time1, i_position ),
 256              input_OffsetToTime( p_input, psz_time2, A->i_size ) );
 257 #undef A
 258
 259     vlc_cond_signal( &p_input->stream.stream_wait );
 260     vlc_mutex_unlock( &p_input->stream.stream_lock );
 261
 262     vlc_object_release( p_input );
 263 }
 264
 265 /*****************************************************************************
 266  * input_Tell: requests the stream postion
 267  *****************************************************************************/
 268 void __input_Tell( vlc_object_t * p_this, stream_position_t * p_position )
 269 {
 270     input_thread_t *p_input;
 271
 272     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 273
 274     if( p_input == NULL )
 275     {
 276         p_position->i_tell = 0;
 277         p_position->i_size = 0;
 278         p_position->i_mux_rate = 0;
 279         msg_Err( p_this, "no input found" );
 280         return;
 281     }
 282
 283     vlc_mutex_lock( &p_input->stream.stream_lock );
 284
 285 #define A p_input->stream.p_selected_area
 286     p_position->i_tell = A->i_tell;
 287     p_position->i_size = A->i_size;
 288     p_position->i_mux_rate = p_input->stream.i_mux_rate;
 289 #undef A
 290
 291     vlc_mutex_unlock( &p_input->stream.stream_lock );
 292     vlc_object_release( p_input );
 293 }
 294
 295 /*****************************************************************************
 296  * input_OffsetToTime : converts an off_t value to a time indicator, using
 297  *                      mux_rate
 298  *****************************************************************************
 299  * BEWARE : this function assumes that you already own the lock on
 300  * p_input->stream.stream_lock
 301  *****************************************************************************/
 302 char * input_OffsetToTime( input_thread_t * p_input, char * psz_buffer,
 303                            off_t i_offset )
 304 {
 305     mtime_t         i_seconds;
 306
 307     if( p_input->stream.i_mux_rate )
 308     {
 309         i_seconds = i_offset / 50 / p_input->stream.i_mux_rate;
 310         return secstotimestr( psz_buffer, i_seconds );
 311     }
 312     else
 313     {
 314         /* Divide by zero is not my friend. */
 315         sprintf( psz_buffer, "-:--:--" );
 316         return( psz_buffer );
 317     }
 318 }
 319
 320 /*****************************************************************************
 321  * input_DumpStream: dumps the contents of a stream descriptor
 322  *****************************************************************************
 323  * BEWARE : this function assumes that you already own the lock on
 324  * p_input->stream.stream_lock
 325  *****************************************************************************/
 326 void input_DumpStream( input_thread_t * p_input )
 327 {
 328     char psz_time1[MSTRTIME_MAX_SIZE];
 329     char psz_time2[MSTRTIME_MAX_SIZE];
 330     unsigned int i, j;
 331
 332 #define S   p_input->stream
 333     msg_Dbg( p_input, "dumping stream ID 0x%x [OK:%ld/D:%ld]", S.i_stream_id,
 334              S.c_packets_read, S.c_packets_trashed );
 335     if( S.b_seekable )
 336         msg_Dbg( p_input, "seekable stream, position: "I64Fd"/"I64Fd" (%s/%s)",
 337                  S.p_selected_area->i_tell, S.p_selected_area->i_size,
 338                  input_OffsetToTime( p_input, psz_time1,
 339                                      S.p_selected_area->i_tell ),
 340                  input_OffsetToTime( p_input, psz_time2,
 341                                      S.p_selected_area->i_size ) );
 342     else
 343         msg_Dbg( p_input, "pace %scontrolled", S.b_pace_control ? "" : "un-" );
 344 #undef S
 345     for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
 346     {
 347 #define P   p_input->stream.pp_programs[i]
 348         msg_Dbg( p_input, "dumping program 0x%x, version %d (%s)",
 349                  P->i_number, P->i_version,
 350                  P->b_is_ok ? "complete" : "partial" );
 351 #undef P
 352         for( j = 0; j < p_input->stream.pp_programs[i]->i_es_number; j++ )
 353         {
 354 #define ES  p_input->stream.pp_programs[i]->pp_es[j]
 355             msg_Dbg( p_input, "ES 0x%x, "
 356                      "stream 0x%x, fourcc `%4.4s', %s [OK:%ld/ERR:%ld]",
 357                      ES->i_id, ES->i_stream_id, (char*)&ES->i_fourcc,
 358                      ES->p_dec != NULL ? "selected" : "not selected",
 359                      ES->c_packets, ES->c_invalid_packets );
 360 #undef ES
 361         }
 362     }
 363 }
 364
 365 /*****************************************************************************
 366  * input_ToggleES: answers to a user request with calls to (Un)SelectES
 367  *****************************************************************************
 368  * Useful since the interface plugins know p_es.
 369  * It only works for audio & spu ( to be sure nothing nasty is being done ).
 370  * b_select is a boolean to know if we have to select or unselect ES
 371  *****************************************************************************/
 372 int input_ToggleES( input_thread_t * p_input, es_descriptor_t * p_es,
 373                     vlc_bool_t b_select )
 374 {
 375     vlc_mutex_lock( &p_input->stream.stream_lock );
 376
 377     if( p_es != NULL )
 378     {
 379         if( b_select )
 380         {
 381             p_input->stream.p_newly_selected_es = p_es;
 382         }
 383         else
 384         {
 385             p_input->stream.p_removed_es = p_es;
 386         }
 387     }
 388
 389     vlc_mutex_unlock( &p_input->stream.stream_lock );
 390
 391     return 0;
 392 }
 393
 394 /****************************************************************************
 395  * input_ChangeArea: interface request an area change
 396  ****************************************************************************/
 397 int input_ChangeArea( input_thread_t * p_input, input_area_t * p_area )
 398 {
 399     vlc_mutex_lock( &p_input->stream.stream_lock );
 400
 401     p_input->stream.p_new_area = p_area;
 402
 403     vlc_mutex_unlock( &p_input->stream.stream_lock );
 404
 405     return 0;
 406 }
 407
 408 /****************************************************************************
 409  * input_ChangeProgram: interface request a program change
 410  ****************************************************************************/
 411 int input_ChangeProgram( input_thread_t * p_input, uint16_t i_program_number )
 412 {
 413     pgrm_descriptor_t *       p_program;
 414     vlc_value_t val;
 415
 416     vlc_mutex_lock( &p_input->stream.stream_lock );
 417
 418     p_program = input_FindProgram( p_input, i_program_number );
 419
 420     if ( p_program == NULL )
 421     {
 422         msg_Err( p_input, "could not find selected program" );
 423         return -1;
 424     }
 425
 426     p_input->stream.p_new_program = p_program;
 427
 428     vlc_mutex_unlock( &p_input->stream.stream_lock );
 429
 430     /* Update the navigation variables without triggering a callback */
 431     val.i_int = i_program_number;
 432     var_Change( p_input, "program", VLC_VAR_SETVALUE, &val, NULL );
 433
 434     return 0;
 435 }
 436
 437 /****************************************************************************
 438  * input_ToggleGrayscale: change to grayscale or color output
 439  ****************************************************************************/
 440 int input_ToggleGrayscale( input_thread_t * p_input )
 441 {
 442     /* No need to warn the input thread since only the decoders and outputs
 443      * worry about it. */
 444     vlc_mutex_lock( &p_input->stream.control.control_lock );
 445     p_input->stream.control.b_grayscale =
 446                     !p_input->stream.control.b_grayscale;
 447
 448     msg_Dbg( p_input, "changing to %s output",
 449              p_input->stream.control.b_grayscale ? "grayscale" : "color" );
 450
 451     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 452
 453     return 0;
 454 }
 455
 456 /****************************************************************************
 457  * input_ToggleMute: activate/deactivate mute mode
 458  ****************************************************************************/
 459 int input_ToggleMute( input_thread_t * p_input )
 460 {
 461     /* We need to feed the decoders with 0, and only input can do that, so
 462      * pass the message to the input thread. */
 463     vlc_mutex_lock( &p_input->stream.stream_lock );
 464     p_input->stream.b_new_mute = !p_input->stream.control.b_mute;
 465
 466     msg_Dbg( p_input, "%s mute mode",
 467              p_input->stream.control.b_mute ? "activating" : "deactivating" );
 468
 469     vlc_mutex_unlock( &p_input->stream.stream_lock );
 470
 471     return 0;
 472 }
 473