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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 "libavutil/attributes.h"
29 #include "libswscale/swscale_internal.h"
30
31 #if defined(__FDPIC__) && CONFIG_SRAM
32 #define L1CODE __attribute__((l1_text))
33 #else
34 #define L1CODE
35 #endif
36
37 void ff_bfin_yuv2rgb555_line(const uint8_t *Y, const uint8_t *U,
38                              const uint8_t *V, uint8_t *out,
39                              int w, uint32_t *coeffs) L1CODE;
40
41 void ff_bfin_yuv2rgb565_line(const uint8_t *Y, const uint8_t *U,
42                              const uint8_t *V, uint8_t *out,
43                              int w, uint32_t *coeffs) L1CODE;
44
45 void ff_bfin_yuv2rgb24_line(const uint8_t *Y, const uint8_t *U,
46                             const uint8_t *V, uint8_t *out,
47                             int w, uint32_t *coeffs) L1CODE;
48
49 typedef void (*ltransform)(const uint8_t *Y, const uint8_t *U, const uint8_t *V,
50                            uint8_t *out, int w, uint32_t *coeffs);
51
52 static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
53 {
54     int oy;
55     oy = c->yOffset & 0xffff;
56     oy = oy >> 3;      // keep everything U8.0 for offset calculation
57
58     c->oc = 128 * 0x01010101U;
59     c->oy = oy * 0x01010101U;
60
61     /* copy 64bit vector coeffs down to 32bit vector coeffs */
62     c->cy   = c->yCoeff;
63     c->zero = 0;
64
65     if (rgb) {
66         c->crv = c->vrCoeff;
67         c->cbu = c->ubCoeff;
68         c->cgu = c->ugCoeff;
69         c->cgv = c->vgCoeff;
70     } else {
71         c->crv = c->ubCoeff;
72         c->cbu = c->vrCoeff;
73         c->cgu = c->vgCoeff;
74         c->cgv = c->ugCoeff;
75     }
76
77     if (masks == 555) {
78         c->rmask = 0x001f * 0x00010001U;
79         c->gmask = 0x03e0 * 0x00010001U;
80         c->bmask = 0x7c00 * 0x00010001U;
81     } else if (masks == 565) {
82         c->rmask = 0x001f * 0x00010001U;
83         c->gmask = 0x07e0 * 0x00010001U;
84         c->bmask = 0xf800 * 0x00010001U;
85     }
86 }
87
88 static int core_yuv420_rgb(SwsContext *c, const uint8_t **in, int *instrides,
89                            int srcSliceY, int srcSliceH, uint8_t **oplanes,
90                            int *outstrides, ltransform lcscf,
91                            int rgb, int masks)
92 {
93     const uint8_t *py, *pu, *pv;
94     uint8_t *op;
95     int w  = instrides[0];
96     int h2 = srcSliceH >> 1;
97     int i;
98
99     bfin_prepare_coefficients(c, rgb, masks);
100
101     py = in[0];
102     pu = in[1 + (1 ^ rgb)];
103     pv = in[1 + (0 ^ rgb)];
104
105     op = oplanes[0] + srcSliceY * outstrides[0];
106
107     for (i = 0; i < h2; i++) {
108         lcscf(py, pu, pv, op, w, &c->oy);
109
110         py += instrides[0];
111         op += outstrides[0];
112
113         lcscf(py, pu, pv, op, w, &c->oy);
114
115         py += instrides[0];
116         pu += instrides[1];
117         pv += instrides[2];
118         op += outstrides[0];
119     }
120
121     return srcSliceH;
122 }
123
124 static int bfin_yuv420_rgb555(SwsContext *c, const uint8_t **in, int *instrides,
125                               int srcSliceY, int srcSliceH,
126                               uint8_t **oplanes, int *outstrides)
127 {
128     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
129                            outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
130 }
131
132 static int bfin_yuv420_bgr555(SwsContext *c, const uint8_t **in, int *instrides,
133                               int srcSliceY, int srcSliceH,
134                               uint8_t **oplanes, int *outstrides)
135 {
136     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
137                            outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
138 }
139
140 static int bfin_yuv420_rgb24(SwsContext *c, const uint8_t **in, int *instrides,
141                              int srcSliceY, int srcSliceH,
142                              uint8_t **oplanes, int *outstrides)
143 {
144     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
145                            outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
146 }
147
148 static int bfin_yuv420_bgr24(SwsContext *c, const uint8_t **in, int *instrides,
149                              int srcSliceY, int srcSliceH,
150                              uint8_t **oplanes, int *outstrides)
151 {
152     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
153                            outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
154 }
155
156 static int bfin_yuv420_rgb565(SwsContext *c, const uint8_t **in, int *instrides,
157                               int srcSliceY, int srcSliceH,
158                               uint8_t **oplanes, int *outstrides)
159 {
160     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
161                            outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
162 }
163
164 static int bfin_yuv420_bgr565(SwsContext *c, const uint8_t **in, int *instrides,
165                               int srcSliceY, int srcSliceH,
166                               uint8_t **oplanes, int *outstrides)
167 {
168     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
169                            outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
170 }
171
172 av_cold SwsFunc ff_yuv2rgb_init_bfin(SwsContext *c)
173 {
174     SwsFunc f;
175
176     switch (c->dstFormat) {
177     case AV_PIX_FMT_RGB555:
178         f = bfin_yuv420_rgb555;
179         break;
180     case AV_PIX_FMT_BGR555:
181         f = bfin_yuv420_bgr555;
182         break;
183     case AV_PIX_FMT_RGB565:
184         f = bfin_yuv420_rgb565;
185         break;
186     case AV_PIX_FMT_BGR565:
187         f = bfin_yuv420_bgr565;
188         break;
189     case AV_PIX_FMT_RGB24:
190         f = bfin_yuv420_rgb24;
191         break;
192     case AV_PIX_FMT_BGR24:
193         f = bfin_yuv420_bgr24;
194         break;
195     default:
196         return 0;
197     }
198
199     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
200            av_get_pix_fmt_name(c->dstFormat));
201
202     return f;
203 }