Delete unnecessary 'extern' keywords.
[ffmpeg.git] / libswscale / 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 <stdio.h>
25 #include <stdlib.h>
26 #include <string.h>
27 #include <inttypes.h>
28 #include <assert.h>
29 #include "config.h"
30 #ifdef HAVE_MALLOC_H
31 #include <malloc.h>
32 #endif
33 #include <unistd.h>
34 #include "rgb2rgb.h"
35 #include "swscale.h"
36 #include "swscale_internal.h"
37
38 #ifdef __FDPIC__
39 #define L1CODE __attribute__ ((l1_text))
40 #else
41 #define L1CODE
42 #endif
43
44 void ff_bfin_yuv2rgb555_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
45                               int w, uint32_t *coeffs) L1CODE;
46
47 void ff_bfin_yuv2rgb565_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
48                               int w, uint32_t *coeffs) L1CODE;
49
50 void ff_bfin_yuv2rgb24_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
51                              int w, uint32_t *coeffs) L1CODE;
52
53 typedef void (* ltransform_t)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
54                               int w, uint32_t *coeffs);
55
56
57 static void bfin_prepare_coefficients (SwsContext *c, int rgb, int masks)
58 {
59     int oy;
60     oy      = c->yOffset&0xffff;
61     oy      = oy >> 3; // keep everything U8.0 for offset calculation
62
63     c->oc   = 128*0x01010101U;
64     c->oy   =  oy*0x01010101U;
65
66     /* copy 64bit vector coeffs down to 32bit vector coeffs */
67     c->cy  = c->yCoeff;
68     c->zero = 0;
69
70     if (rgb) {
71         c->crv = c->vrCoeff;
72         c->cbu = c->ubCoeff;
73         c->cgu = c->ugCoeff;
74         c->cgv = c->vgCoeff;
75     } else {
76         c->crv = c->ubCoeff;
77         c->cbu = c->vrCoeff;
78         c->cgu = c->vgCoeff;
79         c->cgv = c->ugCoeff;
80     }
81
82
83     if (masks == 555) {
84         c->rmask = 0x001f * 0x00010001U;
85         c->gmask = 0x03e0 * 0x00010001U;
86         c->bmask = 0x7c00 * 0x00010001U;
87     } else if (masks == 565) {
88         c->rmask = 0x001f * 0x00010001U;
89         c->gmask = 0x07e0 * 0x00010001U;
90         c->bmask = 0xf800 * 0x00010001U;
91     }
92 }
93
94 static int core_yuv420_rgb (SwsContext *c,
95                             uint8_t **in, int *instrides,
96                             int srcSliceY, int srcSliceH,
97                             uint8_t **oplanes, int *outstrides,
98                             ltransform_t lcscf, int rgb, int masks)
99 {
100     uint8_t *py,*pu,*pv,*op;
101     int w  = instrides[0];
102     int h2 = srcSliceH>>1;
103     int i;
104
105     bfin_prepare_coefficients (c, rgb, masks);
106
107     py = in[0];
108     pu = in[1+(1^rgb)];
109     pv = in[1+(0^rgb)];
110
111     op = oplanes[0] + srcSliceY*outstrides[0];
112
113     for (i=0;i<h2;i++) {
114
115         lcscf (py, pu, pv, op, w, &c->oy);
116
117         py += instrides[0];
118         op += outstrides[0];
119
120         lcscf (py, pu, pv, op, w, &c->oy);
121
122         py += instrides[0];
123         pu += instrides[1];
124         pv += instrides[2];
125         op += outstrides[0];
126     }
127
128     return srcSliceH;
129 }
130
131
132 static int bfin_yuv420_rgb555 (SwsContext *c,
133                                uint8_t **in, int *instrides,
134                                int srcSliceY, int srcSliceH,
135                                uint8_t **oplanes, int *outstrides)
136 {
137     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
138                             ff_bfin_yuv2rgb555_line, 1, 555);
139 }
140
141 static int bfin_yuv420_bgr555 (SwsContext *c,
142                                uint8_t **in, int *instrides,
143                                int srcSliceY, int srcSliceH,
144                                uint8_t **oplanes, int *outstrides)
145 {
146     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
147                             ff_bfin_yuv2rgb555_line, 0, 555);
148 }
149
150 static int bfin_yuv420_rgb24 (SwsContext *c,
151                               uint8_t **in, int *instrides,
152                               int srcSliceY, int srcSliceH,
153                               uint8_t **oplanes, int *outstrides)
154 {
155     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
156                             ff_bfin_yuv2rgb24_line, 1, 888);
157 }
158
159 static int bfin_yuv420_bgr24 (SwsContext *c,
160                               uint8_t **in, int *instrides,
161                               int srcSliceY, int srcSliceH,
162                               uint8_t **oplanes, int *outstrides)
163 {
164     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
165                             ff_bfin_yuv2rgb24_line, 0, 888);
166 }
167
168 static int bfin_yuv420_rgb565 (SwsContext *c,
169                                uint8_t **in, int *instrides,
170                                int srcSliceY, int srcSliceH,
171                                uint8_t **oplanes, int *outstrides)
172 {
173     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
174                             ff_bfin_yuv2rgb565_line, 1, 565);
175 }
176
177 static int bfin_yuv420_bgr565 (SwsContext *c,
178                                uint8_t **in, int *instrides,
179                                int srcSliceY, int srcSliceH,
180                                uint8_t **oplanes, int *outstrides)
181 {
182     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
183                             ff_bfin_yuv2rgb565_line, 0, 565);
184 }
185
186
187 SwsFunc ff_bfin_yuv2rgb_get_func_ptr (SwsContext *c)
188 {
189     SwsFunc f;
190
191     switch(c->dstFormat) {
192     case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
193     case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
194     case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
195     case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
196     case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
197     case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
198     default:
199         return 0;
200     }
201
202     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
203            sws_format_name (c->dstFormat));
204
205     return f;
206 }