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