26  *  struct plugin    struct instance
40  * That is, A connects to B, and B connects to C. If the plugin B is
49 	struct plugin *plugin;  /* the plugin corresponds to the instance */  member
50 	int original_index;  /* the port index in the plugin */
57 	struct plugin *plugin;  /* the plugin corresponds to the instance */  member
58 	int original_index;  /* the port index in the plugin */
65 /* An instance is a dynamic representation of a plugin. We only create
66  * an instance when a plugin is needed (data actually flows through it
68  * struct dsp_module, which is the implementation of the plugin */
70 	/* The plugin this instance corresponds to */
71 	struct plugin *plugin;  member
74 	 * between this and the port array in a struct plugin is that
83 	/* The implementation of the plugin */
148 						struct plugin *plugin)  in find_instance_by_plugin()  argument
154 		if (instance->plugin == plugin)  in find_instance_by_plugin()
161 /* Finds out where the data sent to plugin:index come from. The issue
162  * we need to handle here is the previous plugin may be disabled, so
165 			    struct plugin *plugin, int index,  in find_origin_port()  argument
166 			    struct plugin **origin, int *origin_index)  in find_origin_port()
175 	port = ARRAY_ELEMENT(&plugin->ports, index);  in find_origin_port()
182 	/* move to the previous plugin */  in find_origin_port()
183 	plugin = flow->from;  in find_origin_port()
186 	/* if the plugin is not disabled, it will be pointed by some instance */  in find_origin_port()
187 	if (find_instance_by_plugin(instances, plugin)) {  in find_origin_port()
188 		*origin = plugin;  in find_origin_port()
193 	/* Now we know the previous plugin is disabled, we need to go  in find_origin_port()
194 	 * upstream. We assume the k-th output port of the plugin  in find_origin_port()
195 	 * corresponds to the k-th input port of the plugin (with the  in find_origin_port()
200 	FOR_ARRAY_ELEMENT(&plugin->ports, i, port) {  in find_origin_port()
212 	FOR_ARRAY_ELEMENT(&plugin->ports, i, port) {  in find_origin_port()
224 	return find_origin_port(ini, instances, plugin, index, origin,  in find_origin_port()
229 						 struct plugin *plugin,  in find_output_audio_port()  argument
236 	instance = find_instance_by_plugin(instances, plugin);  in find_output_audio_port()
249 						     struct plugin *plugin,  in find_output_control_port()  argument
256 	instance = find_instance_by_plugin(instances, plugin);  in find_output_control_port()
268 static char is_disabled(struct plugin *plugin, struct cras_expr_env *env)  in is_disabled()  argument
271 	return (plugin->disable_expr &&  in is_disabled()
273 			plugin->disable_expr, env, &disabled) == 0 &&  in is_disabled()
279 			    struct plugin *plugin, char* visited)  in topological_sort()  argument
289 	index = ARRAY_INDEX(&ini->plugins, plugin);  in topological_sort()
294 	FOR_ARRAY_ELEMENT(&plugin->ports, i, port) {  in topological_sort()
300 			syslog(LOG_ERR, "no plugin flows to %s:%d",  in topological_sort()
301 			       plugin->title, i);  in topological_sort()
308 	/* if the plugin is disabled, we don't construct an instance for it */  in topological_sort()
309 	if (is_disabled(plugin, env))  in topological_sort()
313 	instance->plugin = plugin;  in topological_sort()
316 	FOR_ARRAY_ELEMENT(&plugin->ports, i, port) {  in topological_sort()
319                 struct plugin *origin = NULL;  in topological_sort()
323 			if (find_origin_port(ini, &pipeline->instances, plugin,  in topological_sort()
335 			audio_port->plugin = plugin;  in topological_sort()
354 			control_port->plugin = plugin;  in topological_sort()
373 static struct plugin *find_enabled_builtin_plugin(struct ini *ini,  in find_enabled_builtin_plugin()
379 	struct plugin *plugin, *found = NULL;  in find_enabled_builtin_plugin()  local
381 	FOR_ARRAY_ELEMENT(&ini->plugins, i, plugin) {  in find_enabled_builtin_plugin()
382 		if (strcmp(plugin->library, "builtin") != 0)  in find_enabled_builtin_plugin()
384 		if (strcmp(plugin->label, label) != 0)  in find_enabled_builtin_plugin()
386 		if (!plugin->purpose || strcmp(plugin->purpose, purpose) != 0)  in find_enabled_builtin_plugin()
388 		if (is_disabled(plugin, env))  in find_enabled_builtin_plugin()
392 			       label, found->title, plugin->title);  in find_enabled_builtin_plugin()
395 		found = plugin;  in find_enabled_builtin_plugin()
409 	struct plugin *source = find_enabled_builtin_plugin(  in cras_dsp_pipeline_create()
411 	struct plugin *sink = find_enabled_builtin_plugin(  in cras_dsp_pipeline_create()
466 static int load_module(struct plugin *plugin, struct instance *instance)  in load_module()  argument
469 	module = cras_dsp_module_load_builtin(plugin);  in load_module()
471 		module = cras_dsp_module_load_ladspa(plugin);  in load_module()
574 		 * plugin B has the MODULE_INPLACE_BROKEN flag, then  in allocate_buffers()
575 		 * peak_buf is 5 because plugin B cannot output to the  in allocate_buffers()
602 		struct plugin *plugin = instance->plugin;  in cras_dsp_pipeline_load()  local
603 		if (load_module(plugin, instance) != 0)  in cras_dsp_pipeline_load()
630 				&pipeline->instances, audio_port->peer->plugin);  in calculate_audio_delay()
648 		syslog(LOG_DEBUG, "instantiate %s", instance->plugin->label);  in cras_dsp_pipeline_instantiate()
670 			       audio_port->buf_index, instance->plugin->title,  in cras_dsp_pipeline_instantiate()
679 			       audio_port->buf_index, instance->plugin->title,  in cras_dsp_pipeline_instantiate()
697 			       control_port->value, instance->plugin->title,  in cras_dsp_pipeline_instantiate()
706 			       control_port->value, instance->plugin->title,  in cras_dsp_pipeline_instantiate()
887 		instance->plugin = NULL;  in cras_dsp_pipeline_free()
979 		      i, instance->plugin->title, module,  in cras_dsp_pipeline_dump()