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 1.42 2002/11/10 18:04:23 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
  29 #include <vlc/vlc.h>
  30
  31 #ifdef HAVE_SYS_TYPES_H
  32 #   include <sys/types.h>                                           /* off_t */
  33 #endif
  34
  35 #include "stream_control.h"
  36 #include "input_ext-dec.h"
  37 #include "input_ext-intf.h"
  38 #include "input_ext-plugins.h"
  39
  40 /*****************************************************************************
  41  * input_SetStatus: change the reading status
  42  *****************************************************************************/
  43 void __input_SetStatus( vlc_object_t * p_this, int i_mode )
  44 {
  45     input_thread_t *p_input;
  46
  47     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
  48
  49     if( p_input == NULL )
  50     {
  51         msg_Err( p_this, "no input found" );
  52         return;
  53     }
  54
  55     vlc_mutex_lock( &p_input->stream.stream_lock );
  56
  57     switch( i_mode )
  58     {
  59     case INPUT_STATUS_END:
  60         p_input->stream.i_new_status = PLAYING_S;
  61         p_input->b_eof = 1;
  62         msg_Dbg( p_input, "end of stream" );
  63         break;
  64
  65     case INPUT_STATUS_PLAY:
  66         p_input->stream.i_new_status = PLAYING_S;
  67         msg_Dbg( p_input, "playing at normal rate" );
  68         break;
  69
  70     case INPUT_STATUS_PAUSE:
  71         /* XXX: we don't need to check i_status, because input_clock.c
  72          * does it for us */
  73         p_input->stream.i_new_status = PAUSE_S;
  74         msg_Dbg( p_input, "toggling pause" );
  75         break;
  76
  77     case INPUT_STATUS_FASTER:
  78         /* If we are already going too fast, go back to default rate */
  79         if( p_input->stream.control.i_rate * 8 <= DEFAULT_RATE )
  80         {
  81             p_input->stream.i_new_status = PLAYING_S;
  82             msg_Dbg( p_input, "playing at normal rate" );
  83         }
  84         else
  85         {
  86             p_input->stream.i_new_status = FORWARD_S;
  87
  88             if( p_input->stream.control.i_rate < DEFAULT_RATE
  89                     && p_input->stream.control.i_status == FORWARD_S )
  90             {
  91                 p_input->stream.i_new_rate =
  92                                     p_input->stream.control.i_rate / 2;
  93             }
  94             else
  95             {
  96                 p_input->stream.i_new_rate = DEFAULT_RATE / 2;
  97             }
  98             msg_Dbg( p_input, "playing at %i:1 fast forward",
  99                      DEFAULT_RATE / p_input->stream.i_new_rate );
 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             p_input->stream.i_new_status = PLAYING_S;
 108             msg_Dbg( p_input, "playing at normal rate" );
 109         }
 110         else
 111         {
 112             p_input->stream.i_new_status = FORWARD_S;
 113
 114             if( p_input->stream.control.i_rate > DEFAULT_RATE
 115                     && p_input->stream.control.i_status == FORWARD_S )
 116             {
 117                 p_input->stream.i_new_rate =
 118                                     p_input->stream.control.i_rate * 2;
 119             }
 120             else
 121             {
 122                 p_input->stream.i_new_rate = DEFAULT_RATE * 2;
 123             }
 124             msg_Dbg( p_input, "playing at 1:%i slow motion",
 125                       p_input->stream.i_new_rate / DEFAULT_RATE );
 126         }
 127         break;
 128
 129     default:
 130         break;
 131     }
 132
 133     vlc_cond_signal( &p_input->stream.stream_wait );
 134     vlc_mutex_unlock( &p_input->stream.stream_lock );
 135
 136     vlc_object_release( p_input );
 137 }
 138
 139 /*****************************************************************************
 140  * input_Seek: changes the stream postion
 141  *****************************************************************************/
 142 void __input_Seek( vlc_object_t * p_this, off_t i_position, int i_whence )
 143 {
 144     input_thread_t *p_input;
 145
 146     char psz_time1[OFFSETTOTIME_MAX_SIZE];
 147     char psz_time2[OFFSETTOTIME_MAX_SIZE];
 148
 149     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 150
 151     if( p_input == NULL )
 152     {
 153         msg_Err( p_this, "no input found" );
 154         return;
 155     }
 156
 157     vlc_mutex_lock( &p_input->stream.stream_lock );
 158
 159 #define A p_input->stream.p_selected_area
 160     switch( i_whence & 0x30 )
 161     {
 162         case INPUT_SEEK_SECONDS:
 163             i_position *= (off_t)50 * p_input->stream.i_mux_rate;
 164             break;
 165
 166         case INPUT_SEEK_PERCENT:
 167             i_position = A->i_size * i_position / (off_t)100;
 168             break;
 169
 170         case INPUT_SEEK_BYTES:
 171         default:
 172             break;
 173     }
 174
 175     switch( i_whence & 0x03 )
 176     {
 177         case INPUT_SEEK_CUR:
 178             A->i_seek = A->i_tell + i_position;
 179             break;
 180
 181         case INPUT_SEEK_END:
 182             A->i_seek = A->i_size + i_position;
 183             break;
 184
 185         case INPUT_SEEK_SET:
 186         default:
 187             A->i_seek = i_position;
 188             break;
 189     }
 190
 191     if( A->i_seek < 0 )
 192     {
 193         A->i_seek = 0;
 194     }
 195     else if( A->i_seek > A->i_size )
 196     {
 197         A->i_seek = A->i_size;
 198     }
 199
 200     msg_Dbg( p_input, "seeking position "I64Fd"/"I64Fd" (%s/%s)",
 201              A->i_seek, A->i_size,
 202              input_OffsetToTime( p_input, psz_time1, i_position ),
 203              input_OffsetToTime( p_input, psz_time2, A->i_size ) );
 204 #undef A
 205
 206     vlc_cond_signal( &p_input->stream.stream_wait );
 207     vlc_mutex_unlock( &p_input->stream.stream_lock );
 208
 209     vlc_object_release( p_input );
 210 }
 211
 212 /*****************************************************************************
 213  * input_Tell: requests the stream postion
 214  *****************************************************************************/
 215 void __input_Tell( vlc_object_t * p_this, stream_position_t * p_position )
 216 {
 217     input_thread_t *p_input;
 218
 219     p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
 220
 221     if( p_input == NULL )
 222     {
 223         p_position->i_tell = 0;
 224         p_position->i_size = 0;
 225         p_position->i_mux_rate = 0;
 226         msg_Err( p_this, "no input found" );
 227         return;
 228     }
 229
 230     vlc_mutex_lock( &p_input->stream.stream_lock );
 231
 232 #define A p_input->stream.p_selected_area
 233     p_position->i_tell = A->i_tell;
 234     p_position->i_size = A->i_size;
 235     p_position->i_mux_rate = p_input->stream.i_mux_rate;
 236 #undef A
 237
 238     vlc_mutex_unlock( &p_input->stream.stream_lock );
 239     vlc_object_release( p_input );
 240 }
 241
 242 /*****************************************************************************
 243  * input_OffsetToTime : converts an off_t value to a time indicator, using
 244  *                      mux_rate
 245  *****************************************************************************
 246  * BEWARE : this function assumes that you already own the lock on
 247  * p_input->stream.stream_lock
 248  *****************************************************************************/
 249 char * input_OffsetToTime( input_thread_t * p_input, char * psz_buffer,
 250                            off_t i_offset )
 251 {
 252     mtime_t         i_seconds;
 253
 254     if( p_input->stream.i_mux_rate )
 255     {
 256         i_seconds = i_offset / 50 / p_input->stream.i_mux_rate;
 257         snprintf( psz_buffer, OFFSETTOTIME_MAX_SIZE, "%d:%02d:%02d",
 258                  (int) (i_seconds / (60 * 60)),
 259                  (int) (i_seconds / 60 % 60),
 260                  (int) (i_seconds % 60) );
 261         return( psz_buffer );
 262     }
 263     else
 264     {
 265         /* Divide by zero is not my friend. */
 266         sprintf( psz_buffer, "-:--:--" );
 267         return( psz_buffer );
 268     }
 269 }
 270
 271 /*****************************************************************************
 272  * input_DumpStream: dumps the contents of a stream descriptor
 273  *****************************************************************************
 274  * BEWARE : this function assumes that you already own the lock on
 275  * p_input->stream.stream_lock
 276  *****************************************************************************/
 277 void input_DumpStream( input_thread_t * p_input )
 278 {
 279     int         i, j;
 280     char        psz_time1[OFFSETTOTIME_MAX_SIZE];
 281     char        psz_time2[OFFSETTOTIME_MAX_SIZE];
 282
 283 #define S   p_input->stream
 284     msg_Dbg( p_input, "dumping stream ID 0x%x [OK:%d/D:%d]", S.i_stream_id,
 285              S.c_packets_read, S.c_packets_trashed );
 286     if( S.b_seekable )
 287         msg_Dbg( p_input, "seekable stream, position: "I64Fd"/"I64Fd" (%s/%s)",
 288                  S.p_selected_area->i_tell, S.p_selected_area->i_size,
 289                  input_OffsetToTime( p_input, psz_time1,
 290                                      S.p_selected_area->i_tell ),
 291                  input_OffsetToTime( p_input, psz_time2,
 292                                      S.p_selected_area->i_size ) );
 293     else
 294         msg_Dbg( p_input, "pace %scontrolled", S.b_pace_control ? "" : "un-" );
 295 #undef S
 296     for( i = 0; i < p_input->stream.i_pgrm_number; i++ )
 297     {
 298 #define P   p_input->stream.pp_programs[i]
 299         msg_Dbg( p_input, "dumping program 0x%x, version %d (%s)",
 300                  P->i_number, P->i_version,
 301                  P->b_is_ok ? "complete" : "partial" );
 302 #undef P
 303         for( j = 0; j < p_input->stream.pp_programs[i]->i_es_number; j++ )
 304         {
 305 #define ES  p_input->stream.pp_programs[i]->pp_es[j]
 306             msg_Dbg( p_input,
 307                      "ES 0x%x, stream 0x%x, fourcc `%4.4s', %s [OK:%d/ERR:%d]",
 308                      ES->i_id, ES->i_stream_id, (char*)&ES->i_fourcc,
 309                      ES->p_decoder_fifo != NULL ? "selected" : "not selected",
 310                      ES->c_packets, ES->c_invalid_packets );
 311 #undef ES
 312         }
 313     }
 314 }
 315
 316 /*****************************************************************************
 317  * input_ToggleES: answers to a user request with calls to (Un)SelectES
 318  *****************************************************************************
 319  * Useful since the interface plugins know p_es.
 320  * It only works for audio & spu ( to be sure nothing nasty is being done ).
 321  * b_select is a boolean to know if we have to select or unselect ES
 322  *****************************************************************************/
 323 int input_ToggleES( input_thread_t * p_input, es_descriptor_t * p_es,
 324                     vlc_bool_t b_select )
 325 {
 326     vlc_mutex_lock( &p_input->stream.stream_lock );
 327
 328     if( p_es != NULL )
 329     {
 330         if( b_select )
 331         {
 332             p_input->stream.p_newly_selected_es = p_es;
 333         }
 334         else
 335         {
 336             p_input->stream.p_removed_es = p_es;
 337         }
 338     }
 339
 340     vlc_mutex_unlock( &p_input->stream.stream_lock );
 341
 342     return 0;
 343 }
 344
 345 /****************************************************************************
 346  * input_ChangeArea: interface request an area change
 347  ****************************************************************************/
 348 int input_ChangeArea( input_thread_t * p_input, input_area_t * p_area )
 349 {
 350     vlc_mutex_lock( &p_input->stream.stream_lock );
 351
 352     p_input->stream.p_new_area = p_area;
 353
 354     vlc_mutex_unlock( &p_input->stream.stream_lock );
 355
 356     return 0;
 357 }
 358
 359 /****************************************************************************
 360  * input_ChangeProgram: interface request a program change
 361  ****************************************************************************/
 362 int input_ChangeProgram( input_thread_t * p_input, u16 i_program_number )
 363 {
 364     pgrm_descriptor_t *       p_program;
 365
 366     vlc_mutex_lock( &p_input->stream.stream_lock );
 367
 368     p_program = input_FindProgram( p_input, i_program_number );
 369
 370     if ( p_program == NULL )
 371     {
 372         msg_Err( p_input, "could not find selected program" );
 373         return -1;
 374     }
 375
 376     p_input->stream.p_new_program = p_program;
 377
 378     vlc_mutex_unlock( &p_input->stream.stream_lock );
 379
 380     return 0;
 381 }
 382
 383 /****************************************************************************
 384  * input_ToggleGrayscale: change to grayscale or color output
 385  ****************************************************************************/
 386 int input_ToggleGrayscale( input_thread_t * p_input )
 387 {
 388     /* No need to warn the input thread since only the decoders and outputs
 389      * worry about it. */
 390     vlc_mutex_lock( &p_input->stream.control.control_lock );
 391     p_input->stream.control.b_grayscale =
 392                     !p_input->stream.control.b_grayscale;
 393
 394     msg_Dbg( p_input, "changing to %s output",
 395              p_input->stream.control.b_grayscale ? "grayscale" : "color" );
 396
 397     vlc_mutex_unlock( &p_input->stream.control.control_lock );
 398
 399     return 0;
 400 }
 401
 402 /****************************************************************************
 403  * input_ToggleMute: activate/deactivate mute mode
 404  ****************************************************************************/
 405 int input_ToggleMute( input_thread_t * p_input )
 406 {
 407     /* We need to feed the decoders with 0, and only input can do that, so
 408      * pass the message to the input thread. */
 409     vlc_mutex_lock( &p_input->stream.stream_lock );
 410     p_input->stream.b_new_mute = !p_input->stream.control.b_mute;
 411
 412     msg_Dbg( p_input, "%s mute mode",
 413              p_input->stream.control.b_mute ? "activating" : "deactivating" );
 414
 415     vlc_mutex_unlock( &p_input->stream.stream_lock );
 416
 417     return 0;
 418 }
 419