omxVCCOMM_ExpandFrame_I.c revision 78e52bfac041d71ce53b5b13c2abf78af742b09d 
1/*
2 * Copyright (C) 2007-2008 ARM Limited
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 *
19 * File Name:  omxVCCOMM_ExpandFrame_I.c
20 * OpenMAX DL: v1.0.2
21 * Revision:   9641
22 * Date:       Thursday, February 7, 2008
23 *
24 *
25 *
26 * Description:
27 * This function will Expand Frame boundary pixels into Plane
28 *
29 */
30
31#include "omxtypes.h"
32#include "armOMX.h"
33#include "omxVC.h"
34
35#include "armCOMM.h"
36
37/**
38 * Function:  omxVCCOMM_ExpandFrame_I   (6.1.3.2.1)
39 *
40 * Description:
41 * This function expands a reconstructed frame in-place.  The unexpanded
42 * source frame should be stored in a plane buffer with sufficient space
43 * pre-allocated for edge expansion, and the input frame should be located in
44 * the plane buffer center.  This function executes the pixel expansion by
45 * replicating source frame edge pixel intensities in the empty pixel
46 * locations (expansion region) between the source frame edge and the plane
47 * buffer edge.  The width/height of the expansion regions on the
48 * horizontal/vertical edges is controlled by the parameter iExpandPels.
49 *
50 * Input Arguments:
51 *
52 *   pSrcDstPlane - pointer to the top-left corner of the frame to be
53 *            expanded; must be aligned on an 8-byte boundary.
54 *   iFrameWidth - frame width; must be a multiple of 8.
55 *   iFrameHeight -frame height; must be a multiple of 8.
56 *   iExpandPels - number of pixels to be expanded in the horizontal and
57 *            vertical directions; must be a multiple of 8.
58 *   iPlaneStep - distance, in bytes, between the start of consecutive lines
59 *            in the plane buffer; must be larger than or equal to
60 *            (iFrameWidth + 2 * iExpandPels).
61 *
62 * Output Arguments:
63 *
64 *   pSrcDstPlane -Pointer to the top-left corner of the frame (NOT the
65 *            top-left corner of the plane); must be aligned on an 8-byte
66 *            boundary.
67 *
68 * Return Value:
69 *
70 *    OMX_Sts_NoErr - no error
71 *    OMX_Sts_BadArgErr - bad arguments; returned under any of the following
72 *              conditions:
73 *    -    pSrcDstPlane is NULL.
74 *    -    pSrcDstPlane is not aligned on an 8-byte boundary.
75 *    -    one of the following parameters is either equal to zero or is a
76 *              non-multiple of 8: iFrameHeight, iFrameWidth, iPlaneStep, or
77 *              iExpandPels.
78 *    -    iPlaneStep < (iFrameWidth + 2 * iExpandPels).
79 *
80 */
81OMXResult omxVCCOMM_ExpandFrame_I(
82	OMX_U8*	pSrcDstPlane,
83	OMX_U32	iFrameWidth,
84	OMX_U32	iFrameHeight,
85	OMX_U32	iExpandPels,
86	OMX_U32	iPlaneStep
87)
88{
89    OMX_INT     x, y;
90    OMX_U8*     pLeft;
91    OMX_U8*     pRight;
92    OMX_U8*     pTop;
93    OMX_U8*     pBottom;
94
95    /* check for argument error */
96    armRetArgErrIf(pSrcDstPlane == NULL, OMX_Sts_BadArgErr)
97    armRetArgErrIf(armNot8ByteAligned(pSrcDstPlane), OMX_Sts_BadArgErr)
98    armRetArgErrIf(iFrameWidth == 0 || iFrameWidth & 7, OMX_Sts_BadArgErr)
99    armRetArgErrIf(iFrameHeight== 0 || iFrameHeight & 7, OMX_Sts_BadArgErr)
100    armRetArgErrIf(iExpandPels == 0 || iExpandPels & 7, OMX_Sts_BadArgErr)
101    armRetArgErrIf(iPlaneStep == 0 || iPlaneStep & 7, OMX_Sts_BadArgErr)
102    armRetArgErrIf(iPlaneStep < (iFrameWidth + 2 * iExpandPels),
103                   OMX_Sts_BadArgErr)
104
105    /* Top and Bottom */
106    pTop = pSrcDstPlane - (iExpandPels * iPlaneStep);
107    pBottom = pSrcDstPlane + (iFrameHeight * iPlaneStep);
108
109    for (y = 0; y < (OMX_INT)iExpandPels; y++)
110    {
111        for (x = 0; x < (OMX_INT)iFrameWidth; x++)
112        {
113            pTop [y * iPlaneStep + x] =
114                pSrcDstPlane [x];
115            pBottom [y * iPlaneStep + x] =
116                pSrcDstPlane [(iFrameHeight - 1) * iPlaneStep + x];
117        }
118    }
119
120    /* Left, Right and Corners */
121    pLeft = pSrcDstPlane - iExpandPels;
122    pRight = pSrcDstPlane + iFrameWidth;
123
124    for (y = -(OMX_INT)iExpandPels; y < (OMX_INT)(iFrameHeight + iExpandPels); y++)
125    {
126        for (x = 0; x < (OMX_INT)iExpandPels; x++)
127        {
128            pLeft [y * iPlaneStep + x] =
129                pSrcDstPlane [y * iPlaneStep + 0];
130            pRight [y * iPlaneStep + x] =
131                pSrcDstPlane [y * iPlaneStep + (iFrameWidth - 1)];
132        }
133    }
134
135    return OMX_Sts_NoErr;
136}
137
138/*****************************************************************************
139 *                              END OF FILE
140 *****************************************************************************/
141
142