/**
 * @file vidfilt.c Video Filter
 *
 * Copyright (C) 2010 Creytiv.com
 */
#include <re.h>
#include <baresip.h>
#include "core.h"


static struct list vfl;


/**
 * Register a new Video Filter
 *
 * @param vf Video Filter to register
 */
void vidfilt_register(struct vidfilt *vf)
{
	if (!vf)
		return;

	list_append(&vfl, &vf->le, vf);

	info("vidfilt: %s\n", vf->name);
}


/**
 * Unregister a Video Filter
 *
 * @param vf Video Filter to unregister
 */
void vidfilt_unregister(struct vidfilt *vf)
{
	if (!vf)
		return;

	list_unlink(&vf->le);
}


/**
 * Get the list of registered Video Filters
 *
 * @return List of Video Filters
 */
struct list *vidfilt_list(void)
{
	return &vfl;
}


static void vidfilt_enc_destructor(void *arg)
{
	struct vidfilt_enc_st *st = arg;

	list_unlink(&st->le);
}


int vidfilt_enc_append(struct list *filtl, void **ctx,
		       const struct vidfilt *vf)
{
	struct vidfilt_enc_st *st = NULL;
	int err;

	if (vf->encupdh) {
		err = vf->encupdh(&st, ctx, vf);
		if (err)
			return err;
	}
	else {
		st = mem_zalloc(sizeof(*st), vidfilt_enc_destructor);
		if (!st)
			return ENOMEM;
	}

	st->vf = vf;
	list_append(filtl, &st->le, st);

	return 0;
}


static void vidfilt_dec_destructor(void *arg)
{
	struct vidfilt_dec_st *st = arg;

	list_unlink(&st->le);
}


int vidfilt_dec_append(struct list *filtl, void **ctx,
		       const struct vidfilt *vf)
{
	struct vidfilt_dec_st *st = NULL;
	int err;

	if (vf->decupdh) {
		err = vf->decupdh(&st, ctx, vf);
		if (err)
			return err;
	}
	else {
		st = mem_zalloc(sizeof(*st), vidfilt_dec_destructor);
		if (!st)
			return ENOMEM;
	}

	st->vf = vf;
	list_append(filtl, &st->le, st);

	return 0;
}