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

   1 /*****************************************************************************
   2  * audio_video.c: Audio/Video management : volume, snapshot, OSD
   3  *****************************************************************************
   4  * Copyright (C) 2005 the VideoLAN team
   5  * $Id$
   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 <mediacontrol_internal.h>
  25
  26 #include <vlc/mediacontrol.h>
  27
  28 #include <vlc/intf.h>
  29 #include <vlc/vout.h>
  30 #include <vlc/aout.h>
  31 #include <vlc_demux.h>
  32
  33 #include <vlc_osd.h>
  34
  35 #define HAS_SNAPSHOT 1
  36
  37 #ifdef HAS_SNAPSHOT
  38 #include <snapshot.h>
  39 #endif
  40
  41 #include <stdlib.h>                                      /* malloc(), free() */
  42 #include <string.h>
  43
  44 #include <errno.h>                                                 /* ENOMEM */
  45 #include <stdio.h>
  46 #include <ctype.h>
  47
  48 #ifdef HAVE_UNISTD_H
  49 #    include <unistd.h>
  50 #endif
  51 #ifdef HAVE_SYS_TIME_H
  52 #    include <sys/time.h>
  53 #endif
  54 #ifdef HAVE_SYS_TYPES_H
  55 #    include <sys/types.h>
  56 #endif
  57
  58 #define RAISE( c, m )  exception->code = c; \
  59                        exception->message = strdup(m);
  60
  61 mediacontrol_RGBPicture *
  62 mediacontrol_snapshot( mediacontrol_Instance *self,
  63                        const mediacontrol_Position * a_position,
  64                        mediacontrol_Exception *exception )
  65 {
  66     mediacontrol_RGBPicture *retval = NULL;
  67     input_thread_t* p_input = self->p_playlist->p_input;
  68     vout_thread_t *p_vout = NULL;
  69     int i_datasize;
  70     snapshot_t **pointer;
  71     vlc_value_t val;
  72     int i_index;
  73     snapshot_t *p_best_snapshot;
  74     long searched_date;
  75 #ifdef HAS_SNAPSHOT
  76     int i_cachesize;
  77 #endif
  78
  79     exception=mediacontrol_exception_init( exception );
  80
  81     /*
  82        if( var_Get( self->p_vlc, "snapshot-id", &val ) == VLC_SUCCESS )
  83        p_vout = vlc_object_get( self->p_vlc, val.i_int );
  84     */
  85
  86     /* FIXME: if in p_libvlc, we cannot have multiple video outputs */
  87     /* Once corrected, search for snapshot-id to modify all instances */
  88     if( var_Get( p_input, "snapshot-id", &val ) != VLC_SUCCESS )
  89     {
  90         RAISE( mediacontrol_InternalException, "No snapshot-id in p_input" );
  91         return NULL;
  92     }
  93     p_vout = vlc_object_get( self->p_vlc, val.i_int );
  94
  95     if( ! p_vout )
  96     {
  97         RAISE( mediacontrol_InternalException, "No snapshot module" );
  98         return NULL;
  99     }
 100
 101 #ifdef HAS_SNAPSHOT
 102     /* We test if the vout is a snapshot module. We cannot test
 103        pvout_psz_object_name( which is NULL ). But we can check if
 104        there are snapshot-specific variables */
 105     if( var_Get( p_vout, "snapshot-datasize", &val ) != VLC_SUCCESS )
 106     {
 107         RAISE( mediacontrol_InternalException, "No snapshot module" );
 108         vlc_object_release( p_vout );
 109         return NULL;
 110     }
 111     i_datasize = val.i_int;
 112
 113     /* Handle the a_position parameter */
 114     if( ! ( a_position->origin == mediacontrol_RelativePosition
 115             && a_position->value == 0 ) )
 116     {
 117         /* The position is not the current one. Go to it. */
 118         mediacontrol_set_media_position( self,
 119                                          ( mediacontrol_Position* ) a_position,
 120                                          exception );
 121         if( exception->code )
 122         {
 123             vlc_object_release( p_vout );
 124             return NULL;
 125         }
 126     }
 127
 128     /* FIXME: We should not go further until we got past the position
 129        ( which means that we had the possibility to capture the right
 130        picture ). */
 131
 132     vlc_mutex_lock( &p_vout->picture_lock );
 133
 134     searched_date = mediacontrol_position2microsecond( p_input,
 135                                                        ( mediacontrol_Position * ) a_position );
 136
 137     var_Get( p_vout, "snapshot-cache-size", &val );
 138     i_cachesize = val.i_int  ;
 139
 140     var_Get( p_vout, "snapshot-list-pointer", &val );
 141     pointer = ( snapshot_t ** )val.p_address;
 142
 143     if( ! pointer )
 144     {
 145         RAISE( mediacontrol_InternalException, "No available snapshot" );
 146
 147         vlc_mutex_unlock( &p_vout->picture_lock );
 148         vlc_object_release( p_vout );
 149         return NULL;
 150     }
 151
 152     /* Find the more appropriate picture, based on date */
 153     p_best_snapshot = pointer[0];
 154
 155     for( i_index = 1 ; i_index < i_cachesize ; i_index++ )
 156     {
 157         long l_diff = pointer[i_index]->date - searched_date;
 158         if( l_diff > 0 && l_diff < abs( p_best_snapshot->date - searched_date ))
 159         {
 160             /* This one is closer, and _after_ the requested position */
 161             p_best_snapshot = pointer[i_index];
 162         }
 163     }
 164
 165     /* FIXME: add a test for the case that no picture matched the test
 166        ( we have p_best_snapshot == pointer[0] */
 167     retval = _mediacontrol_createRGBPicture( p_best_snapshot->i_width,
 168                                              p_best_snapshot->i_height,
 169                                              p_vout->output.i_chroma,
 170                                              p_best_snapshot->date,
 171                                              p_best_snapshot->p_data,
 172                                              i_datasize );
 173
 174     vlc_mutex_unlock( &p_vout->picture_lock );
 175     vlc_object_release( p_vout );
 176
 177 #endif
 178
 179     return retval;
 180 }
 181
 182 mediacontrol_RGBPicture **
 183 mediacontrol_all_snapshots( mediacontrol_Instance *self,
 184                             mediacontrol_Exception *exception )
 185 {
 186     mediacontrol_RGBPicture **retval = NULL;
 187     vout_thread_t *p_vout = NULL;
 188     int i_datasize;
 189     int i_cachesize;
 190     vlc_value_t val;
 191     int i_index;
 192 #ifdef HAS_SNAPSHOT
 193     snapshot_t **pointer;
 194 #endif
 195
 196     exception=mediacontrol_exception_init( exception );
 197
 198     if( var_Get( self->p_playlist->p_input, "snapshot-id", &val ) == VLC_SUCCESS )
 199         p_vout = vlc_object_get( self->p_vlc, val.i_int );
 200
 201     if( ! p_vout )
 202     {
 203         RAISE( mediacontrol_InternalException, "No snapshot module" );
 204         return NULL;
 205     }
 206 #ifdef HAS_SNAPSHOT
 207     /* We test if the vout is a snapshot module. We cannot test
 208        pvout_psz_object_name( which is NULL ). But we can check if
 209        there are snapshot-specific variables */
 210     if( var_Get( p_vout, "snapshot-datasize", &val ) != VLC_SUCCESS )
 211     {
 212         RAISE( mediacontrol_InternalException, "No snapshot module" );
 213         vlc_object_release( p_vout );
 214         return NULL;
 215     }
 216     i_datasize = val.i_int;
 217
 218     vlc_mutex_lock( &p_vout->picture_lock );
 219
 220     var_Get( p_vout, "snapshot-cache-size", &val );
 221     i_cachesize = val.i_int  ;
 222
 223     var_Get( p_vout, "snapshot-list-pointer", &val );
 224     pointer = ( snapshot_t ** )val.p_address;
 225
 226     if( ! pointer )
 227     {
 228         RAISE( mediacontrol_InternalException, "No available picture" );
 229
 230         vlc_mutex_unlock( &p_vout->picture_lock );
 231         vlc_object_release( p_vout );
 232         return NULL;
 233     }
 234
 235     retval = ( mediacontrol_RGBPicture** )malloc( (i_cachesize + 1 ) * sizeof( char* ));
 236
 237     for( i_index = 0 ; i_index < i_cachesize ; i_index++ )
 238     {
 239         snapshot_t *p_s = pointer[i_index];
 240         mediacontrol_RGBPicture *p_rgb;
 241
 242         p_rgb = _mediacontrol_createRGBPicture( p_s->i_width,
 243                                                 p_s->i_height,
 244                                                 p_vout->output.i_chroma,
 245                                                 p_s->date,
 246                                                 p_s->p_data,
 247                                                 i_datasize );
 248
 249         retval[i_index] = p_rgb;
 250     }
 251
 252     retval[i_cachesize] = NULL;
 253
 254     vlc_mutex_unlock( &p_vout->picture_lock );
 255     vlc_object_release( p_vout );
 256
 257 #endif
 258
 259     return retval;
 260 }
 261
 262 int mediacontrol_showtext( vout_thread_t *p_vout, int i_channel,
 263                            char *psz_string, text_style_t *p_style,
 264                            int i_flags, int i_hmargin, int i_vmargin,
 265                            mtime_t i_start, mtime_t i_stop )
 266 {
 267     subpicture_t *p_spu;
 268     video_format_t fmt;
 269
 270     if( !psz_string ) return VLC_EGENERIC;
 271
 272     p_spu = spu_CreateSubpicture( p_vout->p_spu );
 273     if( !p_spu ) return VLC_EGENERIC;
 274
 275     /* Create a new subpicture region */
 276     memset( &fmt, 0, sizeof(video_format_t) );
 277     fmt.i_chroma = VLC_FOURCC('T','E','X','T');
 278     fmt.i_aspect = 0;
 279     fmt.i_width = fmt.i_height = 0;
 280     fmt.i_x_offset = fmt.i_y_offset = 0;
 281     p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_vout), &fmt );
 282     if( !p_spu->p_region )
 283     {
 284         msg_Err( p_vout, "cannot allocate SPU region" );
 285         spu_DestroySubpicture( p_vout->p_spu, p_spu );
 286         return VLC_EGENERIC;
 287     }
 288
 289     p_spu->p_region->psz_text = strdup( psz_string );
 290     p_spu->i_start = i_start;
 291     p_spu->i_stop = i_stop;
 292     p_spu->b_ephemer = VLC_FALSE;
 293     p_spu->b_absolute = VLC_FALSE;
 294
 295     p_spu->i_x = i_hmargin;
 296     p_spu->i_y = i_vmargin;
 297     p_spu->i_flags = i_flags;
 298     p_spu->i_channel = i_channel;
 299
 300     spu_DisplaySubpicture( p_vout->p_spu, p_spu );
 301
 302     return VLC_SUCCESS;
 303 }
 304
 305
 306 void
 307 mediacontrol_display_text( mediacontrol_Instance *self,
 308                            const char * message,
 309                            const mediacontrol_Position * begin,
 310                            const mediacontrol_Position * end,
 311                            mediacontrol_Exception *exception )
 312 {
 313     input_thread_t *p_input = NULL;
 314     vout_thread_t *p_vout = NULL;
 315     char* psz_message;
 316
 317     psz_message = strdup( message );
 318     if( !psz_message )
 319     {
 320         RAISE( mediacontrol_InternalException, "No more memory" );
 321         return;
 322     }
 323
 324     p_vout = vlc_object_find( self->p_playlist, VLC_OBJECT_VOUT, FIND_CHILD );
 325     if( ! p_vout )
 326     {
 327         RAISE( mediacontrol_InternalException, "No video output" );
 328         return;
 329     }
 330
 331     if( begin->origin == mediacontrol_RelativePosition &&
 332         begin->value == 0 &&
 333         end->origin == mediacontrol_RelativePosition )
 334     {
 335         mtime_t i_duration = 0;
 336         mtime_t i_now = mdate();
 337
 338         i_duration = 1000 * mediacontrol_unit_convert( self->p_playlist->p_input,
 339                                                        end->key,
 340                                                        mediacontrol_MediaTime,
 341                                                        end->value );
 342
 343         mediacontrol_showtext( p_vout, DEFAULT_CHAN, psz_message, NULL,
 344                                OSD_ALIGN_BOTTOM | OSD_ALIGN_LEFT, 0, 0,
 345                                i_now, i_now + i_duration );
 346     }
 347     else
 348     {
 349         mtime_t i_debut, i_fin, i_now;
 350
 351         p_input = self->p_playlist->p_input;
 352         if( ! p_input )
 353         {
 354             RAISE( mediacontrol_InternalException, "No input" );
 355             vlc_object_release( p_vout );
 356             return;
 357         }
 358
 359         /* FIXME */
 360         /* i_now = input_ClockGetTS( p_input, NULL, 0 ); */
 361         i_now = mdate();
 362
 363         i_debut = mediacontrol_position2microsecond( p_input,
 364                                                      ( mediacontrol_Position* ) begin );
 365         i_debut += i_now;
 366
 367         i_fin = mediacontrol_position2microsecond( p_input,
 368                                                    ( mediacontrol_Position * ) end );
 369         i_fin += i_now;
 370
 371         vout_ShowTextAbsolute( p_vout, DEFAULT_CHAN, psz_message, NULL,
 372                                OSD_ALIGN_BOTTOM | OSD_ALIGN_LEFT, 0, 0,
 373                                i_debut, i_fin );
 374     }
 375
 376     vlc_object_release( p_vout );
 377 }
 378
 379 unsigned short
 380 mediacontrol_sound_get_volume( mediacontrol_Instance *self,
 381                                mediacontrol_Exception *exception )
 382 {
 383     short retval;
 384     audio_volume_t i_volume;
 385
 386     if( !self->p_intf )
 387     {
 388         RAISE( mediacontrol_InternalException, "No interface module" );
 389         return 0;
 390     }
 391     aout_VolumeGet( self->p_intf, &i_volume );
 392     retval = i_volume;
 393     return retval;
 394 }
 395
 396 void
 397 mediacontrol_sound_set_volume( mediacontrol_Instance *self,
 398                                const unsigned short volume,
 399                                mediacontrol_Exception *exception )
 400 {
 401     if( !self->p_intf )
 402     {
 403         RAISE( mediacontrol_InternalException, "No interface module" );
 404         return;
 405     }
 406     aout_VolumeSet( self->p_intf,( audio_volume_t )volume );
 407 }
 408
 409 vlc_bool_t mediacontrol_set_visual( mediacontrol_Instance *self,
 410                                     WINDOWHANDLE visual_id,
 411                                     mediacontrol_Exception *exception )
 412 {
 413     vlc_value_t value;
 414     int ret;
 415
 416     if( !self->p_vlc )
 417     {
 418         RAISE( mediacontrol_InternalException, "No vlc reference" );
 419         return 0;
 420     }
 421     value.i_int=visual_id;
 422     ret = var_Set(self->p_vlc, "drawable", value);
 423
 424     return (ret == VLC_SUCCESS);
 425 }