static int vlclua_stream_add_filter( lua_State *L )
{
vlc_object_t *p_this = vlclua_get_this( L );
/* Make sure that we have 1 argument (+ 1 object) */
lua_settop( L, 2 );
stream_t **pp_stream = (stream_t **)luaL_checkudata( L, 1, "stream" );
if( !*pp_stream ) return vlclua_error( L );
const char *psz_filter = NULL;
if( lua_isstring( L, 2 ) )
psz_filter = lua_tostring( L, 2 );
if( !psz_filter || !*psz_filter )
{
msg_Dbg( p_this, "adding all automatic stream filters" );
while( true )
{
/* Add next automatic stream */
stream_t *p_filtered = stream_FilterNew( *pp_stream, NULL );
if( !p_filtered )
break;
else
{
msg_Dbg( p_this, "inserted an automatic stream filter" );
*pp_stream = p_filtered;
}
}
luaL_getmetatable( L, "stream" );
lua_setmetatable( L, 1 );
}
else
{
/* Add a named filter */
stream_t *p_filter = stream_FilterNew( *pp_stream, psz_filter );
if( !p_filter )
msg_Dbg( p_this, "Unable to open requested stream filter '%s'",
psz_filter );
else
{
*pp_stream = p_filter;
luaL_getmetatable( L, "stream" );
lua_setmetatable( L, 1 );
}
}
return 1;
}
/* Add automatic stream filter */
stream_t *stream_FilterAutoNew( stream_t *p_source )
{
for( ;; )
{
stream_t *p_filter = stream_FilterNew( p_source, NULL );
if( p_filter == NULL )
break;
msg_Dbg( p_filter, "stream filter added to %p", (void *)p_source );
p_source = p_filter;
}
return p_source;
}
/* Add specified stream filter(s) */
stream_t *stream_FilterChainNew( stream_t *p_source, const char *psz_chain )
{
/* Add user stream filter */
char *chain = strdup( psz_chain );
if( unlikely(chain == NULL) )
return p_source;
char *buf;
for( const char *name = strtok_r( chain, ":", &buf );
name != NULL;
name = strtok_r( NULL, ":", &buf ) )
{
stream_t *p_filter = stream_FilterNew( p_source, name );
if( p_filter != NULL )
p_source = p_filter;
else
msg_Warn( p_source, "cannot insert stream filter %s", name );
}
free( chain );
return p_source;
}
