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 1.39 2002/07/23 00:39:17 sam 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 #include <sys/types.h>                                              /* off_t */
  29
  30 #include <vlc/vlc.h>
  31
  32 #include "stream_control.h"
  33 #include "input_ext-dec.h"
  34 #include "input_ext-intf.h"
  35 #include "input_ext-plugins.h"
  36
  37 /*****************************************************************************
  38  * input_SetStatus: change the reading status
  39  *****************************************************************************/
  40 void __input_SetStatus( vlc_object_t * p_this, int i_mode )
  41 {
  42     input_thread_t *p_input;
  43
  44     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
  45
  46     if( p_input == NULL )
  47     {
  48         msg_Err( p_this, "no input found" );
  49         return;
  50     }
  51
  52     vlc_mutex_lock( &p_input->stream.stream_lock );
  53
  54     switch( i_mode )
  55     {
  56     case INPUT_STATUS_END:
  57         p_input->stream.i_new_status = PLAYING_S;
  58         p_input->b_eof = 1;
  59         msg_Dbg( p_input, "end of stream" );
  60         break;
  61
  62     case INPUT_STATUS_PLAY:
  63         p_input->stream.i_new_status = PLAYING_S;
  64         msg_Dbg( p_input, "playing at normal rate" );
  65         break;
  66
  67     case INPUT_STATUS_PAUSE:
  68         /* XXX: we don't need to check i_status, because input_clock.c
  69          * does it for us */
  70         p_input->stream.i_new_status = PAUSE_S;
  71         msg_Dbg( p_input, "toggling pause" );
  72         break;
  73
  74     case INPUT_STATUS_FASTER:
  75         /* If we are already going too fast, go back to default rate */
  76         if( p_input->stream.control.i_rate * 8 <= DEFAULT_RATE )
  77         {
  78             p_input->stream.i_new_status = PLAYING_S;
  79             msg_Dbg( p_input, "playing at normal rate" );
  80         }
  81         else
  82         {
  83             p_input->stream.i_new_status = FORWARD_S;
  84
  85             if( p_input->stream.control.i_rate < DEFAULT_RATE
  86                     && p_input->stream.control.i_status == FORWARD_S )
  87             {
  88                 p_input->stream.i_new_rate =
  89                                     p_input->stream.control.i_rate / 2;
  90             }
  91             else
  92             {
  93                 p_input->stream.i_new_rate = DEFAULT_RATE / 2;
  94             }
  95             msg_Dbg( p_input, "playing at %i:1 fast forward",
  96                      DEFAULT_RATE / p_input->stream.i_new_rate );
  97         }
  98         break;
  99
 100     case INPUT_STATUS_SLOWER:
 101         /* If we are already going too slow, go back to default rate */
 102         if( p_input->stream.control.i_rate >= 8 * DEFAULT_RATE )
 103         {
 104             p_input->stream.i_new_status = PLAYING_S;
 105             msg_Dbg( p_input, "playing at normal rate" );
 106         }
 107         else
 108         {
 109             p_input->stream.i_new_status = FORWARD_S;
 110
 111             if( p_input->stream.control.i_rate > DEFAULT_RATE
 112                     && p_input->stream.control.i_status == FORWARD_S )
 113             {
 114                 p_input->stream.i_new_rate =
 115                                     p_input->stream.control.i_rate * 2;
 116             }
 117             else
 118             {
 119                 p_input->stream.i_new_rate = DEFAULT_RATE * 2;
 120             }
 121             msg_Dbg( p_input, "playing at 1:%i slow motion",
 122                       p_input->stream.i_new_rate / DEFAULT_RATE );
 123         }
 124         break;
 125
 126     default:
 127         break;
 128     }
 129
 130     vlc_cond_signal( &p_input->stream.stream_wait );
 131     vlc_mutex_unlock( &p_input->stream.stream_lock );
 132
 133     vlc_object_release( p_input );
 134 }
 135
 136 /*****************************************************************************
 137  * input_Seek: changes the stream postion
 138  *****************************************************************************/
 139 void __input_Seek( vlc_object_t * p_this, off_t i_position, int i_whence )
 140 {
 141     input_thread_t *p_input;
 142
 143     char psz_time1[OFFSETTOTIME_MAX_SIZE];
 144     char psz_time2[OFFSETTOTIME_MAX_SIZE];
 145
 146     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 147
 148     if( p_input == NULL )
 149     {
 150         msg_Err( p_this, "no input found" );
 151         return;
 152     }
 153
 154     vlc_mutex_lock( &p_input->stream.stream_lock );
 155
 156 #define A p_input->stream.p_selected_area
 157     switch( i_whence & 0x30 )
 158     {
 159         case INPUT_SEEK_SECONDS:
 160             i_position *= (off_t)50 * p_input->stream.i_mux_rate;
 161             break;
 162
 163         case INPUT_SEEK_PERCENT:
 164             i_position = A->i_size * i_position / (off_t)100;
 165             break;
 166
 167         case INPUT_SEEK_BYTES:
 168         default:
 169             break;
 170     }
 171
 172     switch( i_whence & 0x03 )
 173     {
 174         case INPUT_SEEK_CUR:
 175             A->i_seek = A->i_tell + i_position;
 176             break;
 177
 178         case INPUT_SEEK_END:
 179             A->i_seek = A->i_size + i_position;
 180             break;
 181
 182         case INPUT_SEEK_SET:
 183         default:
 184             A->i_seek = i_position;
 185             break;
 186     }
 187
 188     if( A->i_seek < 0 )
 189     {
 190         A->i_seek = 0;
 191     }
 192     else if( A->i_seek > A->i_size )
 193     {
 194         A->i_seek = A->i_size;
 195     }
 196
 197     msg_Dbg( p_input, "seeking position %lld/%lld (%s/%s)",
 198              A->i_seek, A->i_size,
 199              input_OffsetToTime( p_input, psz_time1, i_position ),
 200              input_OffsetToTime( p_input, psz_time2, A->i_size ) );
 201 #undef A
 202
 203     vlc_cond_signal( &p_input->stream.stream_wait );
 204     vlc_mutex_unlock( &p_input->stream.stream_lock );
 205
 206     vlc_object_release( p_input );
 207 }
 208
 209 /*****************************************************************************
 210  * input_Tell: requests the stream postion
 211  *****************************************************************************/
 212 void __input_Tell( vlc_object_t * p_this, stream_position_t * p_position )
 213 {
 214     input_thread_t *p_input;
 215
 216     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 217
 218     if( p_input == NULL )
 219     {
 220         p_position->i_tell = 0;
 221         p_position->i_size = 0;
 222         p_position->i_mux_rate = 0;
 223         msg_Err( p_this, "no input found" );
 224         return;
 225     }
 226
 227     vlc_mutex_lock( &p_input->stream.stream_lock );
 228
 229 #define A p_input->stream.p_selected_area
 230     p_position->i_tell = A->i_tell;
 231     p_position->i_size = A->i_size;
 232     p_position->i_mux_rate = p_input->stream.i_mux_rate;
 233 #undef A
 234
 235     vlc_mutex_unlock( &p_input->stream.stream_lock );
 236     vlc_object_release( p_input );
 237 }
 238
 239 /*****************************************************************************
 240  * input_OffsetToTime : converts an off_t value to a time indicator, using
 241  *                      mux_rate
 242  *****************************************************************************
 243  * BEWARE : this function assumes that you already own the lock on
 244  * p_input->stream.stream_lock
 245  *****************************************************************************/
 246 char * input_OffsetToTime( input_thread_t * p_input, char * psz_buffer,
 247                            off_t i_offset )
 248 {
 249     mtime_t         i_seconds;
 250
 251     if( p_input->stream.i_mux_rate )
 252     {
 253         i_seconds = i_offset / 50 / p_input->stream.i_mux_rate;
 254         snprintf( psz_buffer, OFFSETTOTIME_MAX_SIZE, "%d:%02d:%02d",
 255                  (int) (i_seconds / (60 * 60)),
 256                  (int) (i_seconds / 60 % 60),
 257                  (int) (i_seconds % 60) );
 258         return( psz_buffer );
 259     }
 260     else
 261     {
 262         /* Divide by zero is not my friend. */
 263         sprintf( psz_buffer, "-:--:--" );
 264         return( psz_buffer );
 265     }
 266 }
 267
 268 /*****************************************************************************
 269  * input_DumpStream: dumps the contents of a stream descriptor
 270  *****************************************************************************
 271  * BEWARE : this function assumes that you already own the lock on
 272  * p_input->stream.stream_lock
 273  *****************************************************************************/
 274 void input_DumpStream( input_thread_t * p_input )
 275 {
 276     int         i, j;
 277     char        psz_time1[OFFSETTOTIME_MAX_SIZE];
 278     char        psz_time2[OFFSETTOTIME_MAX_SIZE];
 279
 280 #define S   p_input->stream
 281     msg_Dbg( p_input, "dumping stream ID 0x%x [OK:%d/D:%d]", S.i_stream_id,
 282              S.c_packets_read, S.c_packets_trashed );
 283     if( S.b_seekable )
 284         msg_Dbg( p_input, "seekable stream, position: %lld/%lld (%s/%s)",
 285                  S.p_selected_area->i_tell, S.p_selected_area->i_size,
 286                  input_OffsetToTime( p_input, psz_time1,
 287                                      S.p_selected_area->i_tell ),
 288                  input_OffsetToTime( p_input, psz_time2,
 289                                      S.p_selected_area->i_size ) );
 290     else
 291         msg_Dbg( p_input, "pace %scontrolled", S.b_pace_control ? "" : "un-" );
 292 #undef S
 293     for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
 294     {
 295 #define P   p_input->stream.pp_programs[i]
 296         msg_Dbg( p_input, "dumping program 0x%x, version %d (%s)",
 297                  P->i_number, P->i_version,
 298                  P->b_is_ok ? "complete" : "partial" );
 299 #undef P
 300         for( j = 0; j < p_input->stream.pp_programs[i]->i_es_number; j++ )
 301         {
 302 #define ES  p_input->stream.pp_programs[i]->pp_es[j]
 303             msg_Dbg( p_input,
 304                      "ES 0x%x, stream 0x%x, fourcc `%4.4s', %s [OK:%d/ERR:%d]",
 305                      ES->i_id, ES->i_stream_id, (char*)&ES->i_fourcc,
 306                      ES->p_decoder_fifo != NULL ? "selected" : "not selected",
 307                      ES->c_packets, ES->c_invalid_packets );
 308 #undef ES
 309         }
 310     }
 311 }
 312
 313 /*****************************************************************************
 314  * input_ToggleES: answers to a user request with calls to (Un)SelectES
 315  *****************************************************************************
 316  * Useful since the interface plugins know p_es.
 317  * It only works for audio & spu ( to be sure nothing nasty is being done ).
 318  * b_select is a boolean to know if we have to select or unselect ES
 319  *****************************************************************************/
 320 int input_ToggleES( input_thread_t * p_input, es_descriptor_t * p_es,
 321                     vlc_bool_t b_select )
 322 {
 323     vlc_mutex_lock( &p_input->stream.stream_lock );
 324
 325     if( p_es != NULL )
 326     {
 327         if( b_select )
 328         {
 329             p_input->stream.p_newly_selected_es = p_es;
 330         }
 331         else
 332         {
 333             p_input->stream.p_removed_es = p_es;
 334         }
 335     }
 336
 337     vlc_mutex_unlock( &p_input->stream.stream_lock );
 338
 339     return 0;
 340 }
 341
 342 /****************************************************************************
 343  * input_ChangeArea: interface request an area change
 344  ****************************************************************************/
 345 int input_ChangeArea( input_thread_t * p_input, input_area_t * p_area )
 346 {
 347     vlc_mutex_lock( &p_input->stream.stream_lock );
 348
 349     p_input->stream.p_new_area = p_area;
 350
 351     vlc_mutex_unlock( &p_input->stream.stream_lock );
 352
 353     return 0;
 354 }
 355
 356 /****************************************************************************
 357  * input_ChangeProgram: interface request a program change
 358  ****************************************************************************/
 359 int input_ChangeProgram( input_thread_t * p_input, u16 i_program_number )
 360 {
 361     pgrm_descriptor_t *       p_program;
 362
 363     vlc_mutex_lock( &p_input->stream.stream_lock );
 364
 365     p_program = input_FindProgram( p_input, i_program_number );
 366
 367     if ( p_program == NULL )
 368     {
 369         msg_Err( p_input, "could not find selected program" );
 370         return -1;
 371     }
 372
 373     p_input->stream.p_new_program = p_program;
 374
 375     vlc_mutex_unlock( &p_input->stream.stream_lock );
 376
 377     return 0;
 378 }
 379
 380 /****************************************************************************
 381  * input_ToggleGrayscale: change to grayscale or color output
 382  ****************************************************************************/
 383 int input_ToggleGrayscale( input_thread_t * p_input )
 384 {
 385     /* No need to warn the input thread since only the decoders and outputs
 386      * worry about it. */
 387     vlc_mutex_lock( &p_input->stream.control.control_lock );
 388     p_input->stream.control.b_grayscale =
 389                     !p_input->stream.control.b_grayscale;
 390
 391     msg_Dbg( p_input, "changing to %s output",
 392              p_input->stream.control.b_grayscale ? "grayscale" : "color" );
 393
 394     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 395
 396     return 0;
 397 }
 398
 399 /****************************************************************************
 400  * input_ToggleMute: activate/deactivate mute mode
 401  ****************************************************************************/
 402 int input_ToggleMute( input_thread_t * p_input )
 403 {
 404     /* We need to feed the decoders with 0, and only input can do that, so
 405      * pass the message to the input thread. */
 406     vlc_mutex_lock( &p_input->stream.stream_lock );
 407     p_input->stream.b_new_mute = !p_input->stream.control.b_mute;
 408
 409     msg_Dbg( p_input, "%s mute mode",
 410              p_input->stream.control.b_mute ? "activating" : "deactivating" );
 411
 412     vlc_mutex_unlock( &p_input->stream.stream_lock );
 413
 414     return 0;
 415 }
 416
 417 /****************************************************************************
 418  * input_SetSMP: change the number of video decoder threads
 419  ****************************************************************************/
 420 int input_SetSMP( input_thread_t * p_input, int i_smp )
 421 {
 422     /* No need to warn the input thread since only the decoders
 423      * worry about it. */
 424     vlc_mutex_lock( &p_input->stream.control.control_lock );
 425     p_input->stream.control.i_smp = i_smp;
 426     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 427
 428     return 0;
 429 }
 430