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     int i_parent_id;
  66 };
  67
  68 /*****************************************************************************
  69  * Local prototypes
  70  *****************************************************************************/
  71 static int Demux( demux_t *p_demux);
  72 static int Control( demux_t *p_demux, int i_query, va_list args );
  73
  74 /*****************************************************************************
  75  * Import_GVP: main import function
  76  *****************************************************************************/
  77 int E_(Import_GVP)( vlc_object_t *p_this )
  78 {
  79     demux_t *p_demux = (demux_t *)p_this;
  80     int i_peek, i, b_found = VLC_FALSE;
  81     byte_t *p_peek;
  82
  83     i_peek = stream_Peek( p_demux->s, &p_peek, MAX_LINE );
  84
  85     for( i = 0; i < i_peek - (int)sizeof("gvp_version:"); i++ )
  86     {
  87         if( p_peek[i] == 'g' && p_peek[i+1] == 'v' && p_peek[i+2] == 'p' &&
  88             !memcmp( p_peek, "gvp_version:", sizeof("gvp_version:") - 1 ) )
  89         {
  90             b_found = VLC_TRUE;
  91             break;
  92         }
  93     }
  94
  95     if( !b_found ) return VLC_EGENERIC;
  96
  97     STANDARD_DEMUX_INIT_MSG(  "using Google Video Playlist (gvp) import" )
  98     p_demux->pf_control = Control;
  99     p_demux->pf_demux = Demux;
 100     MALLOC_ERR( p_demux->p_sys, demux_sys_t );
 101     p_demux->p_sys->p_playlist = NULL;
 102
 103     return VLC_SUCCESS;
 104 }
 105
 106 /*****************************************************************************
 107  * Deactivate: frees unused data
 108  *****************************************************************************/
 109 void E_(Close_GVP)( vlc_object_t *p_this )
 110 {
 111     demux_t *p_demux = (demux_t *)p_this;
 112     demux_sys_t *p_sys = p_demux->p_sys;
 113
 114     if( p_sys->p_playlist )
 115         vlc_object_release( p_sys->p_playlist );
 116     free( p_sys );
 117 }
 118
 119 static int Demux( demux_t *p_demux )
 120 {
 121     demux_sys_t *p_sys = p_demux->p_sys;
 122
 123     char *psz_line;
 124     char *psz_attrvalue;
 125
 126     char *psz_version = NULL;
 127     char *psz_url = NULL;
 128     char *psz_docid = NULL;
 129     int i_duration = -1;
 130     char *psz_title = NULL;
 131     char *psz_description = NULL;
 132
 133     INIT_PLAYLIST_STUFF;
 134
 135     p_sys->p_playlist = p_playlist;
 136     p_sys->p_current = p_current;
 137     p_sys->i_parent_id = i_parent_id;
 138     p_sys->p_item_in_category = p_item_in_category;
 139
 140     while( ( psz_line = stream_ReadLine( p_demux->s ) ) )
 141     {
 142         if( *psz_line == '#' )
 143         {
 144             /* This is a comment */
 145             free( psz_line );
 146             continue;
 147         }
 148         psz_attrvalue = strchr( psz_line, ':' );
 149         if( !psz_attrvalue )
 150         {
 151             msg_Dbg( p_demux, "Unable to parse line (%s)", psz_line );
 152             free( psz_line );
 153             continue;
 154         }
 155         *psz_attrvalue = '\0';
 156         psz_attrvalue++;
 157         if( !strcmp( psz_line, "gvp_version" ) )
 158         {
 159             psz_version = strdup( psz_attrvalue );
 160         }
 161         else if( !strcmp( psz_line, "url" ) )
 162         {
 163             psz_url = strdup( psz_attrvalue );
 164         }
 165         else if( !strcmp( psz_line, "docid" ) )
 166         {
 167             psz_docid = strdup( psz_attrvalue );
 168         }
 169         else if( !strcmp( psz_line, "duration" ) )
 170         {
 171             i_duration = atoi( psz_attrvalue );
 172         }
 173         else if( !strcmp( psz_line, "title" ) )
 174         {
 175             psz_title = strdup( psz_attrvalue );
 176         }
 177         else if( !strcmp( psz_line, "description" ) )
 178         {
 179             char *buf;
 180             if( !psz_description )
 181             {
 182                 psz_description = strdup( psz_attrvalue );
 183             }
 184             else
 185             {
 186                 /* handle multi-line descriptions */
 187                 buf = malloc( strlen( psz_description )
 188                             + strlen( psz_attrvalue ) + 2 );
 189                 sprintf( buf, "%s\n%s", psz_description, psz_attrvalue );
 190                 free( psz_description );
 191                 psz_description = buf;
 192             }
 193             /* remove ^M char at the end of the line (if any) */
 194             buf = psz_description + strlen( psz_description );
 195             if( buf != psz_description )
 196             {
 197                 buf--;
 198                 if( *buf == '\r' ) *buf = '\0';
 199             }
 200         }
 201         free( psz_line );
 202     }
 203
 204     if( !psz_url )
 205     {
 206         msg_Err( p_demux, "URL not found" );
 207     }
 208     else
 209     {
 210         p_input = input_ItemNewExt( p_sys->p_playlist,
 211                                     psz_url, psz_title, 0, NULL, -1 );
 212 #define SADD_INFO( type, field ) if( field ) { input_ItemAddInfo( \
 213                     p_input, _("Google Video"), _(type), "%s", field ) ; }
 214         SADD_INFO( "gvp_version", psz_version );
 215         SADD_INFO( "docid", psz_docid );
 216         SADD_INFO( "description", psz_description );
 217         playlist_AddWhereverNeeded( p_sys->p_playlist, p_input,
 218                             p_sys->p_current, p_sys->p_item_in_category,
 219                             (p_sys->i_parent_id > 0 ) ? VLC_TRUE: VLC_FALSE,
 220                             PLAYLIST_APPEND );
 221     }
 222
 223     HANDLE_PLAY_AND_RELEASE;
 224
 225     free( psz_version );
 226     free( psz_url );
 227     free( psz_docid );
 228     free( psz_title );
 229     free( psz_description );
 230
 231     p_sys->p_playlist = NULL;
 232
 233     return VLC_SUCCESS;
 234 }
 235
 236 static int Control( demux_t *p_demux, int i_query, va_list args )
 237 {
 238     return VLC_EGENERIC;
 239 }