src/control/mediacontrol_util.c

   1 /*****************************************************************************
   2  * util.c: Utility functions and exceptions management
   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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include "mediacontrol_internal.h"
  29 #include <vlc/mediacontrol.h>
  30
  31 #include <vlc_common.h>
  32 #include <vlc_vout.h>
  33 #include <vlc_osd.h>
  34
  35 #include <stdlib.h>                                      /* malloc(), free() */
  36 #include <string.h>
  37
  38 #include <errno.h>                                                 /* ENOMEM */
  39 #include <stdio.h>
  40 #include <ctype.h>
  41
  42 #ifdef HAVE_UNISTD_H
  43 #    include <unistd.h>
  44 #endif
  45 #ifdef HAVE_SYS_TIME_H
  46 #    include <sys/time.h>
  47 #endif
  48 #ifdef HAVE_SYS_TYPES_H
  49 #    include <sys/types.h>
  50 #endif
  51
  52 libvlc_time_t private_mediacontrol_unit_convert( libvlc_media_player_t *p_media_player,
  53                                                  mediacontrol_PositionKey from,
  54                                                  mediacontrol_PositionKey to,
  55                                                  int64_t value )
  56 {
  57     if( to == from )
  58         return value;
  59
  60     if( !p_media_player )
  61         return 0;
  62
  63     switch( from )
  64     {
  65     case mediacontrol_MediaTime:
  66         if( to == mediacontrol_ByteCount )
  67         {
  68             /* FIXME Unsupported */
  69             /* vlc < 0.8 API */
  70             /* return value * 50 * p_input->stream.i_mux_rate / 1000; */
  71             return 0;
  72         }
  73         if( to == mediacontrol_SampleCount )
  74         {
  75             double f_fps;
  76             libvlc_exception_t ex;
  77             libvlc_exception_init( &ex );
  78
  79             f_fps = libvlc_media_player_get_rate( p_media_player, &ex );
  80             if( f_fps < 0 )
  81                 return 0;
  82             else
  83                 return( value * f_fps / 1000.0 );
  84         }
  85         /* Cannot happen */
  86         /* See http://catb.org/~esr/jargon/html/entry/can-t-happen.html */
  87         break;
  88
  89     case mediacontrol_SampleCount:
  90     {
  91         double f_fps;
  92         libvlc_exception_t ex;
  93         libvlc_exception_init( &ex );
  94
  95         f_fps = libvlc_media_player_get_rate( p_media_player, &ex );
  96         if( f_fps < 0 )
  97             return 0;
  98
  99         if( to == mediacontrol_ByteCount )
 100         {
 101             /* FIXME */
 102             /* vlc < 0.8 API */
 103 /*             return ( int64_t )( value * 50 * p_input->stream.i_mux_rate / f_fps ); */
 104             return 0;
 105         }
 106
 107         if( to == mediacontrol_MediaTime )
 108             return( int64_t )( value * 1000.0 / ( double )f_fps );
 109
 110         /* Cannot happen */
 111         break;
 112     }
 113     case mediacontrol_ByteCount:
 114         /* FIXME */
 115         return 0;
 116     }
 117     /* Cannot happen */
 118     return 0;
 119 }
 120
 121 /* Converts a mediacontrol_Position into a time in microseconds in
 122    movie clock time */
 123 libvlc_time_t
 124 private_mediacontrol_position2microsecond( libvlc_media_player_t * p_media_player,
 125                                            const mediacontrol_Position * pos )
 126 {
 127     switch( pos->origin )
 128     {
 129     case mediacontrol_AbsolutePosition:
 130         return ( 1000 * private_mediacontrol_unit_convert( p_media_player,
 131                                                    pos->key, /* from */
 132                                                    mediacontrol_MediaTime,  /* to */
 133                                                    pos->value ) );
 134         break;
 135     case mediacontrol_RelativePosition:
 136     {
 137         libvlc_time_t l_time = 0;
 138         libvlc_time_t l_pos = 0;
 139         libvlc_exception_t ex;
 140         libvlc_exception_init( &ex );
 141
 142         l_time = libvlc_media_player_get_time( p_media_player, &ex );
 143         /* Ignore exception, we will assume a 0 time value */
 144
 145         l_pos = private_mediacontrol_unit_convert( p_media_player,
 146                                                    pos->key,
 147                                                    mediacontrol_MediaTime,
 148                                                    pos->value );
 149         return 1000 * ( l_time + l_pos );
 150         break;
 151     }
 152     case mediacontrol_ModuloPosition:
 153     {
 154         libvlc_time_t l_time = 0;
 155         libvlc_time_t l_length = 0;
 156         libvlc_time_t l_pos = 0;
 157         libvlc_exception_t ex;
 158         libvlc_exception_init( &ex );
 159
 160         l_length = libvlc_media_player_get_length( p_media_player, &ex );
 161         if( l_length <= 0 )
 162             return 0;
 163
 164         l_time = libvlc_media_player_get_time( p_media_player, &ex );
 165         /* Ignore exception, we will assume a 0 time value */
 166
 167         l_pos = private_mediacontrol_unit_convert( p_media_player,
 168                                                    pos->key,
 169                                                    mediacontrol_MediaTime,
 170                                                    pos->value );
 171
 172         return 1000 * ( ( l_time + l_pos ) % l_length );
 173         break;
 174     }
 175     }
 176     return 0;
 177 }
 178
 179 void
 180 mediacontrol_RGBPicture__free( mediacontrol_RGBPicture* pic )
 181 {
 182     if( pic )
 183     {
 184         free( pic->data );
 185         free( pic );
 186     }
 187 }
 188
 189 void
 190 mediacontrol_StreamInformation__free( mediacontrol_StreamInformation* p_si )
 191 {
 192   if( p_si )
 193   {
 194       free( p_si->url );
 195       free( p_si );
 196   }
 197 }
 198
 199
 200 mediacontrol_Exception*
 201 mediacontrol_exception_create( void )
 202 {
 203     mediacontrol_Exception* exception;
 204
 205     exception = ( mediacontrol_Exception* )malloc( sizeof( mediacontrol_Exception ) );
 206     mediacontrol_exception_init( exception );
 207     return exception;
 208 }
 209
 210 void
 211 mediacontrol_exception_init( mediacontrol_Exception *exception )
 212 {
 213     if( exception )
 214     {
 215         exception->code = 0;
 216         exception->message = NULL;
 217     }
 218 }
 219
 220 void
 221 mediacontrol_exception_cleanup( mediacontrol_Exception *exception )
 222 {
 223     if( exception )
 224         free( exception->message );
 225 }
 226
 227 void
 228 mediacontrol_exception_free( mediacontrol_Exception *exception )
 229 {
 230     mediacontrol_exception_cleanup( exception );
 231     free( exception );
 232 }
 233
 234 /**
 235  * Allocates and initializes a mediacontrol_RGBPicture object.
 236  *
 237  * @param i_width: picture width
 238  * @param i_height: picture width
 239  * @param i_chroma: picture chroma
 240  * @param l_date: picture timestamp
 241  * @param p_data: pointer to the data. The data will be directly used, not copied.
 242  * @param i_datasize: data size in bytes
 243  *
 244  * @return the new object, or NULL on error.
 245  */
 246 mediacontrol_RGBPicture*
 247 private_mediacontrol_createRGBPicture( int i_width, int i_height, long i_chroma, int64_t l_date,
 248                                        char* p_data, int i_datasize )
 249 {
 250     mediacontrol_RGBPicture *retval;
 251
 252     retval = ( mediacontrol_RGBPicture * )malloc( sizeof( mediacontrol_RGBPicture ) );
 253     if( retval )
 254     {
 255         retval->width  = i_width;
 256         retval->height = i_height;
 257         retval->type   = i_chroma;
 258         retval->date   = l_date;
 259         retval->size   = i_datasize;
 260         retval->data   = p_data;
 261     }
 262     return retval;
 263 }