d4980e5d71f851c6c7bdd0605746c857c4abc02d
[libav.git] / libswscale / bfin / swscale_bfin.c
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 <stdint.h>
24
25 #include "config.h"
26 #include "libswscale/swscale_internal.h"
27
28 #if defined (__FDPIC__) && CONFIG_SRAM
29 #define L1CODE __attribute__((l1_text))
30 #else
31 #define L1CODE
32 #endif
33
34 int ff_bfin_uyvytoyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst,
35 uint8_t *vdst, int width, int height,
36 int lumStride, int chromStride, int srcStride) L1CODE;
37
38 int ff_bfin_yuyvtoyv12(const uint8_t *src, uint8_t *ydst, uint8_t *udst,
39 uint8_t *vdst, int width, int height,
40 int lumStride, int chromStride, int srcStride) L1CODE;
41
42 static int uyvytoyv12_unscaled(SwsContext *c, const uint8_t *src[],
43 int srcStride[], int srcSliceY, int srcSliceH,
44 uint8_t *dst[], int dstStride[])
45 {
46 uint8_t *dsty = dst[0] + dstStride[0] * srcSliceY;
47 uint8_t *dstu = dst[1] + dstStride[1] * srcSliceY / 2;
48 uint8_t *dstv = dst[2] + dstStride[2] * srcSliceY / 2;
49 const uint8_t *ip = src[0] + srcStride[0] * srcSliceY;
50 int w = dstStride[0];
51
52 ff_bfin_uyvytoyv12(ip, dsty, dstu, dstv, w, srcSliceH,
53 dstStride[0], dstStride[1], srcStride[0]);
54
55 return srcSliceH;
56 }
57
58 static int yuyvtoyv12_unscaled(SwsContext *c, const uint8_t *src[],
59 int srcStride[], int srcSliceY, int srcSliceH,
60 uint8_t *dst[], int dstStride[])
61 {
62 uint8_t *dsty = dst[0] + dstStride[0] * srcSliceY;
63 uint8_t *dstu = dst[1] + dstStride[1] * srcSliceY / 2;
64 uint8_t *dstv = dst[2] + dstStride[2] * srcSliceY / 2;
65 const uint8_t *ip = src[0] + srcStride[0] * srcSliceY;
66 int w = dstStride[0];
67
68 ff_bfin_yuyvtoyv12(ip, dsty, dstu, dstv, w, srcSliceH,
69 dstStride[0], dstStride[1], srcStride[0]);
70
71 return srcSliceH;
72 }
73
74 void ff_get_unscaled_swscale_bfin(SwsContext *c)
75 {
76 if (c->dstFormat == AV_PIX_FMT_YUV420P && c->srcFormat == AV_PIX_FMT_UYVY422) {
77 av_log(NULL, AV_LOG_VERBOSE,
78 "selecting Blackfin optimized uyvytoyv12_unscaled\n");
79 c->swScale = uyvytoyv12_unscaled;
80 }
81 if (c->dstFormat == AV_PIX_FMT_YUV420P && c->srcFormat == AV_PIX_FMT_YUYV422) {
82 av_log(NULL, AV_LOG_VERBOSE,
83 "selecting Blackfin optimized yuyvtoyv12_unscaled\n");
84 c->swScale = yuyvtoyv12_unscaled;
85 }
86 }