git.sesse.net Git - vlc/blob - src/control/audio_video.c

   1 /*****************************************************************************
   2  * audio_video.c: Audio/Video management : volume, snapshot, OSD
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id: vlc.c 10786 2005-04-23 23:19:17Z zorglub $
   6  *
   7  * Authors: Olivier Aubert <olivier.aubert@liris.univ-lyon1.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 #include <vlc/control.h>
  25
  26 #include <vlc/intf.h>
  27 #include <vlc/vout.h>
  28 #include <vlc/aout.h>
  29 #include <vlc_demux.h>
  30
  31 #include <osd.h>
  32
  33 #define HAS_SNAPSHOT 1
  34
  35 #ifdef HAS_SNAPSHOT
  36 #include <snapshot.h>
  37 #endif
  38
  39 #include <stdlib.h>                                      /* malloc(), free() */
  40 #include <string.h>
  41
  42 #include <errno.h>                                                 /* ENOMEM */
  43 #include <stdio.h>
  44 #include <ctype.h>
  45
  46 #ifdef HAVE_UNISTD_H
  47 #    include <unistd.h>
  48 #endif
  49
  50 #ifdef HAVE_SYS_TIME_H
  51 #    include <sys/time.h>
  52 #endif
  53 #include <sys/types.h>
  54
  55 #define RAISE( c, m )  exception->code = c; \
  56                        exception->message = strdup(m);
  57
  58 mediacontrol_RGBPicture *
  59 mediacontrol_snapshot( mediacontrol_Instance *self,
  60                        const mediacontrol_Position * a_position,
  61                        mediacontrol_Exception *exception )
  62 {
  63     mediacontrol_RGBPicture *retval = NULL;
  64     input_thread_t* p_input = self->p_playlist->p_input;
  65     vout_thread_t *p_vout = NULL;
  66     int i_datasize;
  67     snapshot_t **pointer;
  68     vlc_value_t val;
  69     int i_index;
  70     snapshot_t *p_best_snapshot;
  71     long searched_date;
  72 #ifdef HAS_SNAPSHOT
  73     int i_cachesize;
  74 #endif
  75
  76     exception=mediacontrol_exception_init( exception );
  77
  78     /*
  79        if( var_Get( self->p_vlc, "snapshot-id", &val ) == VLC_SUCCESS )
  80        p_vout = vlc_object_get( self->p_vlc, val.i_int );
  81     */
  82
  83     /* FIXME: if in p_libvlc, we cannot have multiple video outputs */
  84     /* Once corrected, search for snapshot-id to modify all instances */
  85     if( var_Get( p_input, "snapshot-id", &val ) != VLC_SUCCESS )
  86     {
  87         RAISE( mediacontrol_InternalException, "No snapshot-id in p_input" );
  88         return NULL;
  89     }
  90     p_vout = vlc_object_get( self->p_vlc, val.i_int );
  91
  92     if( ! p_vout )
  93     {
  94         RAISE( mediacontrol_InternalException, "No snapshot module" );
  95         return NULL;
  96     }
  97
  98 #ifdef HAS_SNAPSHOT
  99     /* We test if the vout is a snapshot module. We cannot test
 100        pvout_psz_object_name( which is NULL ). But we can check if
 101        there are snapshot-specific variables */
 102     if( var_Get( p_vout, "snapshot-datasize", &val ) != VLC_SUCCESS )
 103     {
 104         RAISE( mediacontrol_InternalException, "No snapshot module" );
 105         vlc_object_release( p_vout );
 106         return NULL;
 107     }
 108     i_datasize = val.i_int;
 109
 110     /* Handle the a_position parameter */
 111     if( ! ( a_position->origin == mediacontrol_RelativePosition
 112             && a_position->value == 0 ) )
 113     {
 114         /* The position is not the current one. Go to it. */
 115         mediacontrol_set_media_position( self,
 116                                          ( mediacontrol_Position* ) a_position,
 117                                          exception );
 118         if( exception->code )
 119         {
 120             vlc_object_release( p_vout );
 121             return NULL;
 122         }
 123     }
 124
 125     /* FIXME: We should not go further until we got past the position
 126        ( which means that we had the possibility to capture the right
 127        picture ). */
 128
 129     vlc_mutex_lock( &p_vout->picture_lock );
 130
 131     searched_date = mediacontrol_position2microsecond( p_input,
 132                                                        ( mediacontrol_Position * ) a_position );
 133
 134     var_Get( p_vout, "snapshot-cache-size", &val );
 135     i_cachesize = val.i_int  ;
 136
 137     var_Get( p_vout, "snapshot-list-pointer", &val );
 138     pointer = ( snapshot_t ** )val.p_address;
 139
 140     if( ! pointer )
 141     {
 142         RAISE( mediacontrol_InternalException, "No available snapshot" );
 143
 144         vlc_mutex_unlock( &p_vout->picture_lock );
 145         vlc_object_release( p_vout );
 146         return NULL;
 147     }
 148
 149     /* Find the more appropriate picture, based on date */
 150     p_best_snapshot = pointer[0];
 151
 152     for( i_index = 1 ; i_index < i_cachesize ; i_index++ )
 153     {
 154         long l_diff = pointer[i_index]->date - searched_date;
 155         if( l_diff > 0 && l_diff < abs( p_best_snapshot->date - searched_date ))
 156         {
 157             /* This one is closer, and _after_ the requested position */
 158             p_best_snapshot = pointer[i_index];
 159         }
 160     }
 161
 162     /* FIXME: add a test for the case that no picture matched the test
 163        ( we have p_best_snapshot == pointer[0] */
 164     retval = _mediacontrol_createRGBPicture( p_best_snapshot->i_width,
 165                                              p_best_snapshot->i_height,
 166                                              p_vout->output.i_chroma,
 167                                              p_best_snapshot->date,
 168                                              p_best_snapshot->p_data,
 169                                              i_datasize );
 170
 171     vlc_mutex_unlock( &p_vout->picture_lock );
 172     vlc_object_release( p_vout );
 173
 174 #endif
 175
 176     return retval;
 177 }
 178
 179 mediacontrol_RGBPicture **
 180 mediacontrol_all_snapshots( mediacontrol_Instance *self,
 181                             mediacontrol_Exception *exception )
 182 {
 183     mediacontrol_RGBPicture **retval = NULL;
 184     vout_thread_t *p_vout = NULL;
 185     int i_datasize;
 186     int i_cachesize;
 187     vlc_value_t val;
 188     int i_index;
 189 #ifdef HAS_SNAPSHOT
 190     snapshot_t **pointer;
 191 #endif
 192
 193     exception=mediacontrol_exception_init( exception );
 194
 195     if( var_Get( self->p_playlist->p_input, "snapshot-id", &val ) == VLC_SUCCESS )
 196         p_vout = vlc_object_get( self->p_vlc, val.i_int );
 197
 198     if( ! p_vout )
 199     {
 200         RAISE( mediacontrol_InternalException, "No snapshot module" );
 201         return NULL;
 202     }
 203 #ifdef HAS_SNAPSHOT
 204     /* We test if the vout is a snapshot module. We cannot test
 205        pvout_psz_object_name( which is NULL ). But we can check if
 206        there are snapshot-specific variables */
 207     if( var_Get( p_vout, "snapshot-datasize", &val ) != VLC_SUCCESS )
 208     {
 209         RAISE( mediacontrol_InternalException, "No snapshot module" );
 210         vlc_object_release( p_vout );
 211         return NULL;
 212     }
 213     i_datasize = val.i_int;
 214
 215     vlc_mutex_lock( &p_vout->picture_lock );
 216
 217     var_Get( p_vout, "snapshot-cache-size", &val );
 218     i_cachesize = val.i_int  ;
 219
 220     var_Get( p_vout, "snapshot-list-pointer", &val );
 221     pointer = ( snapshot_t ** )val.p_address;
 222
 223     if( ! pointer )
 224     {
 225         RAISE( mediacontrol_InternalException, "No available picture" );
 226
 227         vlc_mutex_unlock( &p_vout->picture_lock );
 228         vlc_object_release( p_vout );
 229         return NULL;
 230     }
 231
 232     retval = ( mediacontrol_RGBPicture** )malloc( (i_cachesize + 1 ) * sizeof( char* ));
 233
 234     for( i_index = 0 ; i_index < i_cachesize ; i_index++ )
 235     {
 236         snapshot_t *p_s = pointer[i_index];
 237         mediacontrol_RGBPicture *p_rgb;
 238
 239         p_rgb = _mediacontrol_createRGBPicture( p_s->i_width,
 240                                                 p_s->i_height,
 241                                                 p_vout->output.i_chroma,
 242                                                 p_s->date,
 243                                                 p_s->p_data,
 244                                                 i_datasize );
 245
 246         retval[i_index] = p_rgb;
 247     }
 248
 249     retval[i_cachesize] = NULL;
 250
 251     vlc_mutex_unlock( &p_vout->picture_lock );
 252     vlc_object_release( p_vout );
 253
 254 #endif
 255
 256     return retval;
 257 }
 258
 259 int mediacontrol_showtext( vout_thread_t *p_vout, int i_channel,
 260                            char *psz_string, text_style_t *p_style,
 261                            int i_flags, int i_hmargin, int i_vmargin,
 262                            mtime_t i_start, mtime_t i_stop )
 263 {
 264     subpicture_t *p_spu;
 265     video_format_t fmt;
 266
 267     if( !psz_string ) return VLC_EGENERIC;
 268
 269     p_spu = spu_CreateSubpicture( p_vout->p_spu );
 270     if( !p_spu ) return VLC_EGENERIC;
 271
 272     /* Create a new subpicture region */
 273     memset( &fmt, 0, sizeof(video_format_t) );
 274     fmt.i_chroma = VLC_FOURCC('T','E','X','T');
 275     fmt.i_aspect = 0;
 276     fmt.i_width = fmt.i_height = 0;
 277     fmt.i_x_offset = fmt.i_y_offset = 0;
 278     p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_vout), &fmt );
 279     if( !p_spu->p_region )
 280     {
 281         msg_Err( p_vout, "cannot allocate SPU region" );
 282         spu_DestroySubpicture( p_vout->p_spu, p_spu );
 283         return VLC_EGENERIC;
 284     }
 285
 286     p_spu->p_region->psz_text = strdup( psz_string );
 287     p_spu->i_start = i_start;
 288     p_spu->i_stop = i_stop;
 289     p_spu->b_ephemer = VLC_FALSE;
 290     p_spu->b_absolute = VLC_FALSE;
 291
 292     p_spu->i_x = i_hmargin;
 293     p_spu->i_y = i_vmargin;
 294     p_spu->i_flags = i_flags;
 295     p_spu->i_channel = i_channel;
 296
 297     spu_DisplaySubpicture( p_vout->p_spu, p_spu );
 298
 299     return VLC_SUCCESS;
 300 }
 301
 302
 303 void
 304 mediacontrol_display_text( mediacontrol_Instance *self,
 305                            const char * message,
 306                            const mediacontrol_Position * begin,
 307                            const mediacontrol_Position * end,
 308                            mediacontrol_Exception *exception )
 309 {
 310     input_thread_t *p_input = NULL;
 311     vout_thread_t *p_vout = NULL;
 312     char* psz_message;
 313
 314     psz_message = strdup( message );
 315     if( !psz_message )
 316     {
 317         RAISE( mediacontrol_InternalException, "No more memory" );
 318         return;
 319     }
 320
 321     p_vout = vlc_object_find( self->p_playlist, VLC_OBJECT_VOUT, FIND_CHILD );
 322     if( ! p_vout )
 323     {
 324         RAISE( mediacontrol_InternalException, "No video output" );
 325         return;
 326     }
 327
 328     if( begin->origin == mediacontrol_RelativePosition &&
 329         begin->value == 0 &&
 330         end->origin == mediacontrol_RelativePosition )
 331     {
 332         mtime_t i_duration = 0;
 333         mtime_t i_now = mdate();
 334
 335         i_duration = 1000 * mediacontrol_unit_convert( self->p_playlist->p_input,
 336                                                        end->key,
 337                                                        mediacontrol_MediaTime,
 338                                                        end->value );
 339
 340         mediacontrol_showtext( p_vout, DEFAULT_CHAN, psz_message, NULL,
 341                                OSD_ALIGN_BOTTOM | OSD_ALIGN_LEFT, 0, 0,
 342                                i_now, i_now + i_duration );
 343     }
 344     else
 345     {
 346         mtime_t i_debut, i_fin, i_now;
 347
 348         p_input = self->p_playlist->p_input;
 349         if( ! p_input )
 350         {
 351             RAISE( mediacontrol_InternalException, "No input" );
 352             vlc_object_release( p_vout );
 353             return;
 354         }
 355
 356         /* FIXME */
 357         /* i_now = input_ClockGetTS( p_input, NULL, 0 ); */
 358         i_now = mdate();
 359
 360         i_debut = mediacontrol_position2microsecond( p_input,
 361                                                      ( mediacontrol_Position* ) begin );
 362         i_debut += i_now;
 363
 364         i_fin = mediacontrol_position2microsecond( p_input,
 365                                                    ( mediacontrol_Position * ) end );
 366         i_fin += i_now;
 367
 368         vout_ShowTextAbsolute( p_vout, DEFAULT_CHAN, psz_message, NULL,
 369                                OSD_ALIGN_BOTTOM | OSD_ALIGN_LEFT, 0, 0,
 370                                i_debut, i_fin );
 371     }
 372
 373     vlc_object_release( p_vout );
 374 }
 375
 376 unsigned short
 377 mediacontrol_sound_get_volume( mediacontrol_Instance *self,
 378                                mediacontrol_Exception *exception )
 379 {
 380     short retval;
 381     audio_volume_t i_volume;
 382
 383     if( !self->p_intf )
 384     {
 385         RAISE( mediacontrol_InternalException, "No interface module" );
 386         return 0;
 387     }
 388     aout_VolumeGet( self->p_intf, &i_volume );
 389     retval = i_volume;
 390     return retval;
 391 }
 392
 393 void
 394 mediacontrol_sound_set_volume( mediacontrol_Instance *self,
 395                                const unsigned short volume,
 396                                mediacontrol_Exception *exception )
 397 {
 398     if( !self->p_intf )
 399     {
 400         RAISE( mediacontrol_InternalException, "No interface module" );
 401         return;
 402     }
 403     aout_VolumeSet( self->p_intf,( audio_volume_t )volume );
 404 }
 405
 406 bool mediacontrol_set_visual(mediacontrol_Instance* self,
 407                              WINDOWHANDLE visual_id,
 408                              mediacontrol_Exception *exception)
 409 {
 410     vlc_value_t value;
 411     int ret;
 412
 413     if( !self->p_vlc )
 414     {
 415         RAISE( mediacontrol_InternalException, "No vlc reference" );
 416         return 0;
 417     }
 418     value.i_int=visual_id;
 419     ret = var_Set(self->p_vlc, "drawable", value);
 420
 421     return (ret == VLC_SUCCESS);
 422 }