1/*
2 ** Copyright 2003-2010, VisualOn, Inc.
3 **
4 ** Licensed under the Apache License, Version 2.0 (the "License");
5 ** you may not use this file except in compliance with the License.
6 ** You may obtain a copy of the License at
7 **
8 **     http://www.apache.org/licenses/LICENSE-2.0
9 **
10 ** Unless required by applicable law or agreed to in writing, software
11 ** distributed under the License is distributed on an "AS IS" BASIS,
12 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 ** See the License for the specific language governing permissions and
14 ** limitations under the License.
15 */
16
17/***********************************************************************
18*       File: homing.c                                                 *
19*                                                                      *
20*       Description:Performs the homing routines                       *
21*                                                                      *
22************************************************************************/
23
24#include "typedef.h"
25#include "cnst.h"
26#include "basic_op.h"
27#include "bits.h"
28#include "homing.tab"
29
30Word16 encoder_homing_frame_test(Word16 input_frame[])
31{
32	Word32 i;
33	Word16 j = 0;
34
35	/* check 320 input samples for matching EHF_MASK: defined in e_homing.h */
36	for (i = 0; i < L_FRAME16k; i++)
37	{
38		j = (Word16) (input_frame[i] ^ EHF_MASK);
39
40		if (j)
41			break;
42	}
43
44	return (Word16) (!j);
45}
46
47