4  * \brief PCM Hook Interface
10  *  PCM - Hook functions
87 		snd_pcm_hook_t *hook = list_entry(pos, snd_pcm_hook_t, list);  in snd_pcm_hooks_close()  local
88 		err = hook->func(hook);  in snd_pcm_hooks_close()
95 			snd_pcm_hook_t *hook;  in snd_pcm_hooks_close()  local
97 			hook = list_entry(pos, snd_pcm_hook_t, list);  in snd_pcm_hooks_close()
98 			snd_pcm_hook_remove(hook);  in snd_pcm_hooks_close()
119 		snd_pcm_hook_t *hook = list_entry(pos, snd_pcm_hook_t, list);  in snd_pcm_hooks_hw_params()  local
120 		err = hook->func(hook);  in snd_pcm_hooks_hw_params()
135 		snd_pcm_hook_t *hook = list_entry(pos, snd_pcm_hook_t, list);  in snd_pcm_hooks_hw_free()  local
136 		err = hook->func(hook);  in snd_pcm_hooks_hw_free()
255 This plugin is used to call some 'hook' function when this plugin is opened,
261 # Hook arguments definition
266 # PCM hook type
272 # PCM hook definition
274 	type STR		# PCM Hook type (see pcm_hook_type)
280 # PCM hook plugin
291 		ID STR		# Hook name (see pcm_hook)
293 		ID { }		# Hook definition (see pcm_hook)
353 		SNDERR("Invalid hook definition");  in snd_pcm_hook_add_conf()
556  * \brief Get PCM handle for a PCM hook
557  * \param hook PCM hook handle
560 snd_pcm_t *snd_pcm_hook_get_pcm(snd_pcm_hook_t *hook)  in snd_pcm_hook_get_pcm()  argument
562 	assert(hook);  in snd_pcm_hook_get_pcm()
563 	return hook->pcm;  in snd_pcm_hook_get_pcm()
567  * \brief Get callback function private data for a PCM hook
568  * \param hook PCM hook handle
571 void *snd_pcm_hook_get_private(snd_pcm_hook_t *hook)  in snd_pcm_hook_get_private()  argument
573 	assert(hook);  in snd_pcm_hook_get_private()
574 	return hook->private_data;  in snd_pcm_hook_get_private()
578  * \brief Set callback function private data for a PCM hook
579  * \param hook PCM hook handle
582 void snd_pcm_hook_set_private(snd_pcm_hook_t *hook, void *private_data)  in snd_pcm_hook_set_private()  argument
584 	assert(hook);  in snd_pcm_hook_set_private()
585 	hook->private_data = private_data;  in snd_pcm_hook_set_private()
589  * \brief Add a PCM hook at end of hooks chain
590  * \param hookp Returned PCM hook handle
592  * \param type PCM hook type
593  * \param func PCM hook callback function
594  * \param private_data PCM hook private data
597  * Warning: an hook callback function cannot remove an hook of the same type
621  * \brief Remove a PCM hook
622  * \param hook PCM hook handle
625  * Warning: an hook callback cannot remove an hook of the same type
628 int snd_pcm_hook_remove(snd_pcm_hook_t *hook)  in snd_pcm_hook_remove()  argument
630 	assert(hook);  in snd_pcm_hook_remove()
631 	list_del(&hook->list);  in snd_pcm_hook_remove()
632 	free(hook);  in snd_pcm_hook_remove()
640 static int snd_pcm_hook_ctl_elems_hw_params(snd_pcm_hook_t *hook)  in snd_pcm_hook_ctl_elems_hw_params()  argument
642 	snd_sctl_t *h = snd_pcm_hook_get_private(hook);  in snd_pcm_hook_ctl_elems_hw_params()
646 static int snd_pcm_hook_ctl_elems_hw_free(snd_pcm_hook_t *hook)  in snd_pcm_hook_ctl_elems_hw_free()  argument
648 	snd_sctl_t *h = snd_pcm_hook_get_private(hook);  in snd_pcm_hook_ctl_elems_hw_free()
652 static int snd_pcm_hook_ctl_elems_close(snd_pcm_hook_t *hook)  in snd_pcm_hook_ctl_elems_close()  argument
654 	snd_sctl_t *h = snd_pcm_hook_get_private(hook);  in snd_pcm_hook_ctl_elems_close()
656 	snd_pcm_hook_set_private(hook, NULL);  in snd_pcm_hook_ctl_elems_close()