swscale_bfin.c
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1 /*
2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
3  *
4  * Blackfin software video scaler operations
5  *
6  * This file is part of Libav.
7  *
8  * Libav is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * Libav is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with Libav; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <stdio.h>
24 #include <stdlib.h>
25 #include <string.h>
26 #include <inttypes.h>
27 #include <assert.h>
28 #include "config.h"
29 #include <unistd.h>
30 #include "libswscale/rgb2rgb.h"
31 #include "libswscale/swscale.h"
33 
34 #if defined (__FDPIC__) && CONFIG_SRAM
35 #define L1CODE __attribute__ ((l1_text))
36 #else
37 #define L1CODE
38 #endif
39 
40 int ff_bfin_uyvytoyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
41  int width, int height,
42  int lumStride, int chromStride, int srcStride) L1CODE;
43 
44 int ff_bfin_yuyvtoyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
45  int width, int height,
46  int lumStride, int chromStride, int srcStride) L1CODE;
47 
48 static int uyvytoyv12_unscaled(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
49  int srcSliceH, uint8_t* dst[], int dstStride[])
50 {
51  uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
52  uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
53  uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
54  uint8_t *ip = src[0] + srcStride[0]*srcSliceY;
55  int w = dstStride[0];
56 
57  ff_bfin_uyvytoyv12(ip, dsty, dstu, dstv, w, srcSliceH,
58  dstStride[0], dstStride[1], srcStride[0]);
59 
60  return srcSliceH;
61 }
62 
63 static int yuyvtoyv12_unscaled(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
64  int srcSliceH, uint8_t* dst[], int dstStride[])
65 {
66  uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
67  uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
68  uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
69  uint8_t *ip = src[0] + srcStride[0]*srcSliceY;
70  int w = dstStride[0];
71 
72  ff_bfin_yuyvtoyv12(ip, dsty, dstu, dstv, w, srcSliceH,
73  dstStride[0], dstStride[1], srcStride[0]);
74 
75  return srcSliceH;
76 }
77 
78 
80 {
82  av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized uyvytoyv12_unscaled\n");
84  }
86  av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized yuyvtoyv12_unscaled\n");
88  }
89 }