channel.c

void ast_install_music_functions(int (*start_ptr)(struct ast_channel *, char *),
								 void (*stop_ptr)(struct ast_channel *),
								 void (*cleanup_ptr)(struct ast_channel *)
								 ) 
{
	ast_moh_start_ptr = start_ptr;
	ast_moh_stop_ptr = stop_ptr;
	ast_moh_cleanup_ptr = cleanup_ptr;
}

void ast_uninstall_music_functions(void) 
{
	ast_moh_start_ptr = NULL;
	ast_moh_stop_ptr = NULL;
	ast_moh_cleanup_ptr = NULL;
}

/*! Turn on/off music on hold on a given channel */

int ast_moh_start(struct ast_channel *chan, char *mclass) 
{
	if(ast_moh_start_ptr)
		return ast_moh_start_ptr(chan, mclass);

	if (option_verbose > 2)
		ast_verbose(VERBOSE_PREFIX_3 "Music class %s requested but no musiconhold loaded.\n", mclass ? mclass : "default");
	
	return 0;
}

void ast_moh_stop(struct ast_channel *chan) 
{
	if(ast_moh_stop_ptr)
		ast_moh_stop_ptr(chan);
}

void ast_moh_cleanup(struct ast_channel *chan) 
{
	if(ast_moh_cleanup_ptr)
        ast_moh_cleanup_ptr(chan);
}

void ast_channels_init(void)
{
	ast_cli_register(&cli_show_channeltypes);
}