git.sesse.net Git - vlc/blob - modules/demux/playlist/gvp.c

   1 /*****************************************************************************
   2  * gvp.c: Google Video Playlist demuxer
   3  *****************************************************************************
   4  * Copyright (C) 2006 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Antoine Cellerier <dionoea @t videolan d.t org>
   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 /**
  25  * Format seems to be:
  26  * gvp_version:<version> (1.1)
  27  * url:<the media's url>
  28  * docid:<integer>
  29  * duration:<integer ms ?>
  30  * title:<the title>
  31  * description:<desc line1>^M
  32  * description:<desc linei>^M
  33  * description:<desc final line (no ^M)>
  34  * lines starting with # are comments
  35  *
  36  * Example:
  37
  38 # download the free Google Video Player from http://video.google.com/
  39 gvp_version:1.1
  40 url:http://vp.video.google.com/videodownload?version=0&secureurl=uAAAAMVHt_Q99OwfGxlWVWH7jd6AA_3n4TboaxIELD_kCg3KcBPSxExZFvQv5DGAxrahVg57KZNZvd0EORPBM3xrxTJ3FdLEWBYiduklpviqjE1Q5zLAkiEZaUsUSFtmbBZDTUUBuN9moYY59eK8lpWXsgTbYB1tLVtaxNBpAMRMyVeHoiJ7BzYdENk-PqJeBbr50QbQ83WK87yJAbN2pSRnF-ucCuNMSLBV7wBL4IcxFpYb1WOK-YXkyxY0NtWlPBufTA&sigh=matNCEVSOR8c-3zN9Gtx0zGinwU&begin=0&len=59749&docid=-715862862672743260
  41 docid:-715862862672743260
  42 duration:59749
  43 title:Apple Macintosh 1984 Superbowl Commercial
  44 description:The now infamous Apple Macintosh commercial aired during the 1984 SuperBowl.
  45
  46  */
  47
  48 /*****************************************************************************
  49  * Preamble
  50  *****************************************************************************/
  51 #include <vlc/vlc.h>
  52 #include <vlc/input.h>
  53 #include <vlc/intf.h>
  54
  55 #include <errno.h>                                                 /* ENOMEM */
  56 #include "playlist.h"
  57
  58 #define MAX_LINE 1024
  59
  60 struct demux_sys_t
  61 {
  62     playlist_t *p_playlist;
  63     playlist_item_t *p_current;
  64     playlist_item_t *p_item_in_category;
  65 };
  66
  67 /*****************************************************************************
  68  * Local prototypes
  69  *****************************************************************************/
  70 static int Demux( demux_t *p_demux);
  71 static int Control( demux_t *p_demux, int i_query, va_list args );
  72
  73 /*****************************************************************************
  74  * Import_GVP: main import function
  75  *****************************************************************************/
  76 int E_(Import_GVP)( vlc_object_t *p_this )
  77 {
  78     demux_t *p_demux = (demux_t *)p_this;
  79     int i_peek, i, b_found = VLC_FALSE;
  80     byte_t *p_peek;
  81
  82     i_peek = stream_Peek( p_demux->s, &p_peek, MAX_LINE );
  83
  84     for( i = 0; i < i_peek - (int)sizeof("gvp_version:"); i++ )
  85     {
  86         if( p_peek[i] == 'g' && p_peek[i+1] == 'v' && p_peek[i+2] == 'p' &&
  87             !memcmp( p_peek, "gvp_version:", sizeof("gvp_version:") - 1 ) )
  88         {
  89             b_found = VLC_TRUE;
  90             break;
  91         }
  92     }
  93
  94     if( !b_found ) return VLC_EGENERIC;
  95
  96     STANDARD_DEMUX_INIT_MSG(  "using Google Video Playlist (gvp) import" )
  97     p_demux->pf_control = Control;
  98     p_demux->pf_demux = Demux;
  99     MALLOC_ERR( p_demux->p_sys, demux_sys_t );
 100     p_demux->p_sys->p_playlist = NULL;
 101
 102     return VLC_SUCCESS;
 103 }
 104
 105 /*****************************************************************************
 106  * Deactivate: frees unused data
 107  *****************************************************************************/
 108 void E_(Close_GVP)( vlc_object_t *p_this )
 109 {
 110     demux_t *p_demux = (demux_t *)p_this;
 111     demux_sys_t *p_sys = p_demux->p_sys;
 112
 113     if( p_sys->p_playlist )
 114         vlc_object_release( p_sys->p_playlist );
 115     free( p_sys );
 116 }
 117
 118 static int Demux( demux_t *p_demux )
 119 {
 120     demux_sys_t *p_sys = p_demux->p_sys;
 121
 122     char *psz_line;
 123     char *psz_attrvalue;
 124
 125     char *psz_version = NULL;
 126     char *psz_url = NULL;
 127     char *psz_docid = NULL;
 128     int i_duration = -1;
 129     char *psz_title = NULL;
 130     char *psz_description = NULL;
 131     input_item_t *p_input;
 132
 133     INIT_PLAYLIST_STUFF;
 134
 135     p_sys->p_playlist = p_playlist;
 136     p_sys->p_current = p_current;
 137     p_sys->p_item_in_category = p_item_in_category;
 138
 139     while( ( psz_line = stream_ReadLine( p_demux->s ) ) )
 140     {
 141         if( *psz_line == '#' )
 142         {
 143             /* This is a comment */
 144             free( psz_line );
 145             continue;
 146         }
 147         psz_attrvalue = strchr( psz_line, ':' );
 148         if( !psz_attrvalue )
 149         {
 150             msg_Dbg( p_demux, "Unable to parse line (%s)", psz_line );
 151             free( psz_line );
 152             continue;
 153         }
 154         *psz_attrvalue = '\0';
 155         psz_attrvalue++;
 156         if( !strcmp( psz_line, "gvp_version" ) )
 157         {
 158             psz_version = strdup( psz_attrvalue );
 159         }
 160         else if( !strcmp( psz_line, "url" ) )
 161         {
 162             psz_url = strdup( psz_attrvalue );
 163         }
 164         else if( !strcmp( psz_line, "docid" ) )
 165         {
 166             psz_docid = strdup( psz_attrvalue );
 167         }
 168         else if( !strcmp( psz_line, "duration" ) )
 169         {
 170             i_duration = atoi( psz_attrvalue );
 171         }
 172         else if( !strcmp( psz_line, "title" ) )
 173         {
 174             psz_title = strdup( psz_attrvalue );
 175         }
 176         else if( !strcmp( psz_line, "description" ) )
 177         {
 178             char *buf;
 179             if( !psz_description )
 180             {
 181                 psz_description = strdup( psz_attrvalue );
 182             }
 183             else
 184             {
 185                 /* handle multi-line descriptions */
 186                 buf = malloc( strlen( psz_description )
 187                             + strlen( psz_attrvalue ) + 2 );
 188                 sprintf( buf, "%s\n%s", psz_description, psz_attrvalue );
 189                 free( psz_description );
 190                 psz_description = buf;
 191             }
 192             /* remove ^M char at the end of the line (if any) */
 193             buf = psz_description + strlen( psz_description );
 194             if( buf != psz_description )
 195             {
 196                 buf--;
 197                 if( *buf == '\r' ) *buf = '\0';
 198             }
 199         }
 200         free( psz_line );
 201     }
 202
 203     if( !psz_url )
 204     {
 205         msg_Err( p_demux, "URL not found" );
 206     }
 207     else
 208     {
 209         p_input = input_ItemNewExt( p_sys->p_playlist,
 210                                     psz_url, psz_title, 0, NULL, -1 );
 211 #define SADD_INFO( type, field ) if( field ) { input_ItemAddInfo( \
 212                     p_input, _("Google Video"), _(type), "%s", field ) ; }
 213         SADD_INFO( "gvp_version", psz_version );
 214         SADD_INFO( "docid", psz_docid );
 215         SADD_INFO( "description", psz_description );
 216         playlist_BothAddInput( p_sys->p_playlist, p_input,
 217                                p_sys->p_item_in_category,
 218                                PLAYLIST_APPEND | PLAYLIST_SPREPARSE,
 219                                PLAYLIST_END );
 220     }
 221
 222     HANDLE_PLAY_AND_RELEASE;
 223
 224     free( psz_version );
 225     free( psz_url );
 226     free( psz_docid );
 227     free( psz_title );
 228     free( psz_description );
 229
 230     p_sys->p_playlist = NULL;
 231
 232     return -1; /* Needed for correct operation of go back */
 233 }
 234
 235 static int Control( demux_t *p_demux, int i_query, va_list args )
 236 {
 237     return VLC_EGENERIC;
 238 }