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[ffmpeg] / libswscale / bfin / yuv2rgb_bfin.c
1 /*
2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
3  *
4  * Blackfin video color space converter operations
5  * convert I420 YV12 to RGB in various formats
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23
24 #include "libavutil/pixdesc.h"
25 #include <stdint.h>
26
27 #include "config.h"
28 #include "libswscale/swscale_internal.h"
29
30 #if defined(__FDPIC__) && CONFIG_SRAM
31 #define L1CODE __attribute__((l1_text))
32 #else
33 #define L1CODE
34 #endif
35
36 void ff_bfin_yuv2rgb555_line(const uint8_t *Y, const uint8_t *U,
37                              const uint8_t *V, uint8_t *out,
38                              int w, uint32_t *coeffs) L1CODE;
39
40 void ff_bfin_yuv2rgb565_line(const uint8_t *Y, const uint8_t *U,
41                              const uint8_t *V, uint8_t *out,
42                              int w, uint32_t *coeffs) L1CODE;
43
44 void ff_bfin_yuv2rgb24_line(const uint8_t *Y, const uint8_t *U,
45                             const uint8_t *V, uint8_t *out,
46                             int w, uint32_t *coeffs) L1CODE;
47
48 typedef void (*ltransform)(const uint8_t *Y, const uint8_t *U, const uint8_t *V,
49                            uint8_t *out, int w, uint32_t *coeffs);
50
51 static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
52 {
53     int oy;
54     oy = c->yOffset & 0xffff;
55     oy = oy >> 3;      // keep everything U8.0 for offset calculation
56
57     c->oc = 128 * 0x01010101U;
58     c->oy = oy * 0x01010101U;
59
60     /* copy 64bit vector coeffs down to 32bit vector coeffs */
61     c->cy   = c->yCoeff;
62     c->zero = 0;
63
64     if (rgb) {
65         c->crv = c->vrCoeff;
66         c->cbu = c->ubCoeff;
67         c->cgu = c->ugCoeff;
68         c->cgv = c->vgCoeff;
69     } else {
70         c->crv = c->ubCoeff;
71         c->cbu = c->vrCoeff;
72         c->cgu = c->vgCoeff;
73         c->cgv = c->ugCoeff;
74     }
75
76     if (masks == 555) {
77         c->rmask = 0x001f * 0x00010001U;
78         c->gmask = 0x03e0 * 0x00010001U;
79         c->bmask = 0x7c00 * 0x00010001U;
80     } else if (masks == 565) {
81         c->rmask = 0x001f * 0x00010001U;
82         c->gmask = 0x07e0 * 0x00010001U;
83         c->bmask = 0xf800 * 0x00010001U;
84     }
85 }
86
87 static int core_yuv420_rgb(SwsContext *c, const uint8_t **in, int *instrides,
88                            int srcSliceY, int srcSliceH, uint8_t **oplanes,
89                            int *outstrides, ltransform lcscf,
90                            int rgb, int masks)
91 {
92     const uint8_t *py, *pu, *pv;
93     uint8_t *op;
94     int w  = instrides[0];
95     int h2 = srcSliceH >> 1;
96     int i;
97
98     bfin_prepare_coefficients(c, rgb, masks);
99
100     py = in[0];
101     pu = in[1 + (1 ^ rgb)];
102     pv = in[1 + (0 ^ rgb)];
103
104     op = oplanes[0] + srcSliceY * outstrides[0];
105
106     for (i = 0; i < h2; i++) {
107         lcscf(py, pu, pv, op, w, &c->oy);
108
109         py += instrides[0];
110         op += outstrides[0];
111
112         lcscf(py, pu, pv, op, w, &c->oy);
113
114         py += instrides[0];
115         pu += instrides[1];
116         pv += instrides[2];
117         op += outstrides[0];
118     }
119
120     return srcSliceH;
121 }
122
123 static int bfin_yuv420_rgb555(SwsContext *c, const uint8_t **in, int *instrides,
124                               int srcSliceY, int srcSliceH,
125                               uint8_t **oplanes, int *outstrides)
126 {
127     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
128                            outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
129 }
130
131 static int bfin_yuv420_bgr555(SwsContext *c, const uint8_t **in, int *instrides,
132                               int srcSliceY, int srcSliceH,
133                               uint8_t **oplanes, int *outstrides)
134 {
135     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
136                            outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
137 }
138
139 static int bfin_yuv420_rgb24(SwsContext *c, const uint8_t **in, int *instrides,
140                              int srcSliceY, int srcSliceH,
141                              uint8_t **oplanes, int *outstrides)
142 {
143     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
144                            outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
145 }
146
147 static int bfin_yuv420_bgr24(SwsContext *c, const uint8_t **in, int *instrides,
148                              int srcSliceY, int srcSliceH,
149                              uint8_t **oplanes, int *outstrides)
150 {
151     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
152                            outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
153 }
154
155 static int bfin_yuv420_rgb565(SwsContext *c, const uint8_t **in, int *instrides,
156                               int srcSliceY, int srcSliceH,
157                               uint8_t **oplanes, int *outstrides)
158 {
159     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
160                            outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
161 }
162
163 static int bfin_yuv420_bgr565(SwsContext *c, const uint8_t **in, int *instrides,
164                               int srcSliceY, int srcSliceH,
165                               uint8_t **oplanes, int *outstrides)
166 {
167     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
168                            outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
169 }
170
171 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c)
172 {
173     SwsFunc f;
174
175     switch (c->dstFormat) {
176     case PIX_FMT_RGB555:
177         f = bfin_yuv420_rgb555;
178         break;
179     case PIX_FMT_BGR555:
180         f = bfin_yuv420_bgr555;
181         break;
182     case PIX_FMT_RGB565:
183         f = bfin_yuv420_rgb565;
184         break;
185     case PIX_FMT_BGR565:
186         f = bfin_yuv420_bgr565;
187         break;
188     case PIX_FMT_RGB24:
189         f = bfin_yuv420_rgb24;
190         break;
191     case PIX_FMT_BGR24:
192         f = bfin_yuv420_bgr24;
193         break;
194     default:
195         return 0;
196     }
197
198     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
199            av_get_pix_fmt_name(c->dstFormat));
200
201     return f;
202 }