Consistently use ff_ prefixes for internal symbols.
[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 #include <unistd.h>
31 #include "rgb2rgb.h"
32 #include "swscale.h"
33 #include "swscale_internal.h"
34
35 #ifdef __FDPIC__
36 #define L1CODE __attribute__ ((l1_text))
37 #else
38 #define L1CODE
39 #endif
40
41 void ff_bfin_yuv2rgb555_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
42                              int w, uint32_t *coeffs) L1CODE;
43
44 void ff_bfin_yuv2rgb565_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_yuv2rgb24_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
48                             int w, uint32_t *coeffs) L1CODE;
49
50 typedef void (* ltransform)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
51                             int w, uint32_t *coeffs);
52
53
54 static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
55 {
56     int oy;
57     oy      = c->yOffset&0xffff;
58     oy      = oy >> 3; // keep everything U8.0 for offset calculation
59
60     c->oc   = 128*0x01010101U;
61     c->oy   =  oy*0x01010101U;
62
63     /* copy 64bit vector coeffs down to 32bit vector coeffs */
64     c->cy  = c->yCoeff;
65     c->zero = 0;
66
67     if (rgb) {
68         c->crv = c->vrCoeff;
69         c->cbu = c->ubCoeff;
70         c->cgu = c->ugCoeff;
71         c->cgv = c->vgCoeff;
72     } else {
73         c->crv = c->ubCoeff;
74         c->cbu = c->vrCoeff;
75         c->cgu = c->vgCoeff;
76         c->cgv = c->ugCoeff;
77     }
78
79
80     if (masks == 555) {
81         c->rmask = 0x001f * 0x00010001U;
82         c->gmask = 0x03e0 * 0x00010001U;
83         c->bmask = 0x7c00 * 0x00010001U;
84     } else if (masks == 565) {
85         c->rmask = 0x001f * 0x00010001U;
86         c->gmask = 0x07e0 * 0x00010001U;
87         c->bmask = 0xf800 * 0x00010001U;
88     }
89 }
90
91 static int core_yuv420_rgb(SwsContext *c,
92                            uint8_t **in, int *instrides,
93                            int srcSliceY, int srcSliceH,
94                            uint8_t **oplanes, int *outstrides,
95                            ltransform lcscf, int rgb, int masks)
96 {
97     uint8_t *py,*pu,*pv,*op;
98     int w  = instrides[0];
99     int h2 = srcSliceH>>1;
100     int i;
101
102     bfin_prepare_coefficients(c, rgb, masks);
103
104     py = in[0];
105     pu = in[1+(1^rgb)];
106     pv = in[1+(0^rgb)];
107
108     op = oplanes[0] + srcSliceY*outstrides[0];
109
110     for (i=0;i<h2;i++) {
111
112         lcscf(py, pu, pv, op, w, &c->oy);
113
114         py += instrides[0];
115         op += outstrides[0];
116
117         lcscf(py, pu, pv, op, w, &c->oy);
118
119         py += instrides[0];
120         pu += instrides[1];
121         pv += instrides[2];
122         op += outstrides[0];
123     }
124
125     return srcSliceH;
126 }
127
128
129 static int bfin_yuv420_rgb555(SwsContext *c,
130                               uint8_t **in, int *instrides,
131                               int srcSliceY, int srcSliceH,
132                               uint8_t **oplanes, int *outstrides)
133 {
134     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
135                            outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
136 }
137
138 static int bfin_yuv420_bgr555(SwsContext *c,
139                               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_yuv2rgb555_line, 0, 555);
145 }
146
147 static int bfin_yuv420_rgb24(SwsContext *c,
148                              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, 1, 888);
154 }
155
156 static int bfin_yuv420_bgr24(SwsContext *c,
157                              uint8_t **in, int *instrides,
158                              int srcSliceY, int srcSliceH,
159                              uint8_t **oplanes, int *outstrides)
160 {
161     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
162                            outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
163 }
164
165 static int bfin_yuv420_rgb565(SwsContext *c,
166                               uint8_t **in, int *instrides,
167                               int srcSliceY, int srcSliceH,
168                               uint8_t **oplanes, int *outstrides)
169 {
170     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
171                            outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
172 }
173
174 static int bfin_yuv420_bgr565(SwsContext *c,
175                               uint8_t **in, int *instrides,
176                               int srcSliceY, int srcSliceH,
177                               uint8_t **oplanes, int *outstrides)
178 {
179     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
180                            outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
181 }
182
183
184 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c)
185 {
186     SwsFunc f;
187
188     switch(c->dstFormat) {
189     case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
190     case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
191     case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
192     case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
193     case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
194     case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
195     default:
196         return 0;
197     }
198
199     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
200            sws_format_name (c->dstFormat));
201
202     return f;
203 }