1 /*****************************************************************************
2 * stream.c: stream functions
3 *****************************************************************************
4 * Copyright (C) 2007-2008 the VideoLAN team
7 * Authors: Antoine Cellerier <dionoea at videolan tod org>
8 * Pierre d'Herbemont <pdherbemont # videolan.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
36 #include <vlc_common.h>
37 #include <vlc_plugin.h>
44 /*****************************************************************************
46 *****************************************************************************/
47 static int vlclua_stream_read( lua_State * );
48 static int vlclua_stream_readline( lua_State * );
49 static int vlclua_stream_delete( lua_State * );
50 static int vlclua_stream_add_filter( lua_State *L );
52 static const luaL_Reg vlclua_stream_reg[] = {
53 { "read", vlclua_stream_read },
54 { "readline", vlclua_stream_readline },
55 { "addfilter", vlclua_stream_add_filter },
59 static int vlclua_stream_new_inner( lua_State *L, stream_t *p_stream )
64 lua_pushliteral( L, "Error when opening stream" );
68 stream_t **pp_stream = lua_newuserdata( L, sizeof( stream_t * ) );
69 *pp_stream = p_stream;
71 if( luaL_newmetatable( L, "stream" ) )
74 luaL_register( L, NULL, vlclua_stream_reg );
75 lua_setfield( L, -2, "__index" );
76 lua_pushcfunction( L, vlclua_stream_delete );
77 lua_setfield( L, -2, "__gc" );
80 lua_setmetatable( L, -2 );
84 static int vlclua_stream_new( lua_State *L )
86 vlc_object_t * p_this = vlclua_get_this( L );
87 const char * psz_url = luaL_checkstring( L, 1 );
88 stream_t *p_stream = stream_UrlNew( p_this, psz_url );
89 return vlclua_stream_new_inner( L, p_stream );
92 static int vlclua_memory_stream_new( lua_State *L )
94 vlc_object_t * p_this = vlclua_get_this( L );
95 /* FIXME: duplicating the whole buffer is suboptimal. Keeping a reference to the string so that it doesn't get garbage collected would be better */
96 char * psz_content = strdup( luaL_checkstring( L, 1 ) );
97 stream_t *p_stream = stream_MemoryNew( p_this, (uint8_t *)psz_content, strlen( psz_content ), false );
98 return vlclua_stream_new_inner( L, p_stream );
101 static int vlclua_stream_read( lua_State *L )
104 stream_t **pp_stream = (stream_t **)luaL_checkudata( L, 1, "stream" );
105 int n = luaL_checkint( L, 2 );
106 uint8_t *p_read = malloc( n );
107 if( !p_read ) return vlclua_error( L );
109 i_read = stream_Read( *pp_stream, p_read, n );
111 lua_pushlstring( L, (const char *)p_read, i_read );
118 static int vlclua_stream_readline( lua_State *L )
120 stream_t **pp_stream = (stream_t **)luaL_checkudata( L, 1, "stream" );
121 char *psz_line = stream_ReadLine( *pp_stream );
124 lua_pushstring( L, psz_line );
132 static int vlclua_stream_add_filter( lua_State *L )
134 vlc_object_t *p_this = vlclua_get_this( L );
136 /* Make sure that we have 1 argument (+ 1 object) */
139 stream_t **pp_stream = (stream_t **)luaL_checkudata( L, 1, "stream" );
140 if( !*pp_stream ) return vlclua_error( L );
141 const char *psz_filter = NULL;
143 if( lua_isstring( L, 2 ) )
144 psz_filter = lua_tostring( L, 2 );
146 if( !psz_filter || !*psz_filter )
148 msg_Dbg( p_this, "adding all automatic stream filters" );
151 /* Add next automatic stream */
152 stream_t *p_filtered = stream_FilterNew( *pp_stream, NULL );
157 msg_Dbg( p_this, "inserted an automatic stream filter" );
158 *pp_stream = p_filtered;
161 luaL_getmetatable( L, "stream" );
162 lua_setmetatable( L, 1 );
166 /* Add a named filter */
167 stream_t *p_filter = stream_FilterNew( *pp_stream, psz_filter );
169 msg_Dbg( p_this, "Unable to open requested stream filter '%s'",
173 *pp_stream = p_filter;
174 luaL_getmetatable( L, "stream" );
175 lua_setmetatable( L, 1 );
182 static int vlclua_stream_delete( lua_State *L )
184 stream_t **pp_stream = (stream_t **)luaL_checkudata( L, 1, "stream" );
185 stream_Delete( *pp_stream );
189 /*****************************************************************************
191 *****************************************************************************/
192 void luaopen_stream( lua_State *L )
194 lua_pushcfunction( L, vlclua_stream_new );
195 lua_setfield( L, -2, "stream" );
196 lua_pushcfunction( L, vlclua_memory_stream_new );
197 lua_setfield( L, -2, "memory_stream" );