split up header parsing function
[ffmpeg.git] / libswscale / yuv2rgb_bfin.c
1 /*
2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
3  *                    April 20, 2007
4  *
5  * Blackfin Video Color Space Converters Operations
6  *  convert I420 YV12 to RGB in various formats,
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <inttypes.h>
29 #include <assert.h>
30 #include "config.h"
31 #ifdef HAVE_MALLOC_H
32 #include <malloc.h>
33 #endif
34 #include <unistd.h>
35 #include "rgb2rgb.h"
36 #include "swscale.h"
37 #include "swscale_internal.h"
38
39 #ifdef __FDPIC__
40 #define L1CODE __attribute__ ((l1_text))
41 #else
42 #define L1CODE
43 #endif
44
45 extern void ff_bfin_yuv2rgb555_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
46                                      int w, uint32_t *coeffs) L1CODE;
47
48 extern void ff_bfin_yuv2rgb565_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
49                                      int w, uint32_t *coeffs) L1CODE;
50
51 extern void ff_bfin_yuv2rgb24_line (uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
52                                     int w, uint32_t *coeffs) L1CODE;
53
54 typedef void (* ltransform_t)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
55                               int w, uint32_t *coeffs);
56
57
58 static void bfin_prepare_coefficients (SwsContext *c, int rgb, int masks)
59 {
60     int oy;
61     oy      = c->yOffset&0xffff;
62     oy      = oy >> 3; // keep everything U8.0 for offset calculation
63
64     c->oc   = 128*0x01010101U;
65     c->oy   =  oy*0x01010101U;
66
67     /* copy 64bit vector coeffs down to 32bit vector coeffs */
68     c->cy  = c->yCoeff;
69     c->zero = 0;
70
71     if (rgb) {
72         c->crv = c->vrCoeff;
73         c->cbu = c->ubCoeff;
74         c->cgu = c->ugCoeff;
75         c->cgv = c->vgCoeff;
76     } else {
77         c->crv = c->ubCoeff;
78         c->cbu = c->vrCoeff;
79         c->cgu = c->vgCoeff;
80         c->cgv = c->ugCoeff;
81     }
82
83
84     if (masks == 555) {
85         c->rmask = 0x001f * 0x00010001U;
86         c->gmask = 0x03e0 * 0x00010001U;
87         c->bmask = 0x7c00 * 0x00010001U;
88     } else if (masks == 565) {
89         c->rmask = 0x001f * 0x00010001U;
90         c->gmask = 0x07e0 * 0x00010001U;
91         c->bmask = 0xf800 * 0x00010001U;
92     }
93 }
94
95 static int core_yuv420_rgb (SwsContext *c,
96                             uint8_t **in, int *instrides,
97                             int srcSliceY, int srcSliceH,
98                             uint8_t **oplanes, int *outstrides,
99                             ltransform_t lcscf, int rgb, int masks)
100 {
101     uint8_t *py,*pu,*pv,*op;
102     int w  = instrides[0];
103     int h2 = srcSliceH>>1;
104     int i;
105
106     bfin_prepare_coefficients (c, rgb, masks);
107
108     py = in[0];
109     pu = in[1+(1^rgb)];
110     pv = in[1+(0^rgb)];
111
112     op = oplanes[0] + srcSliceY*outstrides[0];
113
114     for (i=0;i<h2;i++) {
115
116         lcscf (py, pu, pv, op, w, &c->oy);
117
118         py += instrides[0];
119         op += outstrides[0];
120
121         lcscf (py, pu, pv, op, w, &c->oy);
122
123         py += instrides[0];
124         pu += instrides[1];
125         pv += instrides[2];
126         op += outstrides[0];
127     }
128
129     return srcSliceH;
130 }
131
132
133 static int bfin_yuv420_rgb555 (SwsContext *c,
134                                uint8_t **in, int *instrides,
135                                int srcSliceY, int srcSliceH,
136                                uint8_t **oplanes, int *outstrides)
137 {
138     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
139                             ff_bfin_yuv2rgb555_line, 1, 555);
140 }
141
142 static int bfin_yuv420_bgr555 (SwsContext *c,
143                                uint8_t **in, int *instrides,
144                                int srcSliceY, int srcSliceH,
145                                uint8_t **oplanes, int *outstrides)
146 {
147     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
148                             ff_bfin_yuv2rgb555_line, 0, 555);
149 }
150
151 static int bfin_yuv420_rgb24 (SwsContext *c,
152                               uint8_t **in, int *instrides,
153                               int srcSliceY, int srcSliceH,
154                               uint8_t **oplanes, int *outstrides)
155 {
156     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
157                             ff_bfin_yuv2rgb24_line, 1, 888);
158 }
159
160 static int bfin_yuv420_bgr24 (SwsContext *c,
161                               uint8_t **in, int *instrides,
162                               int srcSliceY, int srcSliceH,
163                               uint8_t **oplanes, int *outstrides)
164 {
165     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
166                             ff_bfin_yuv2rgb24_line, 0, 888);
167 }
168
169 static int bfin_yuv420_rgb565 (SwsContext *c,
170                                uint8_t **in, int *instrides,
171                                int srcSliceY, int srcSliceH,
172                                uint8_t **oplanes, int *outstrides)
173 {
174     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
175                             ff_bfin_yuv2rgb565_line, 1, 565);
176 }
177
178 static int bfin_yuv420_bgr565 (SwsContext *c,
179                                uint8_t **in, int *instrides,
180                                int srcSliceY, int srcSliceH,
181                                uint8_t **oplanes, int *outstrides)
182 {
183     return core_yuv420_rgb (c, in, instrides, srcSliceY, srcSliceH, oplanes, outstrides,
184                             ff_bfin_yuv2rgb565_line, 0, 565);
185 }
186
187
188 SwsFunc ff_bfin_yuv2rgb_get_func_ptr (SwsContext *c)
189 {
190     SwsFunc f;
191
192     switch(c->dstFormat) {
193     case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
194     case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
195     case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
196     case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
197     case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
198     case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
199     default:
200         return 0;
201     }
202
203     av_log(c, AV_LOG_INFO, "BlackFin Accelerated Color Space Converter %s\n",
204            sws_format_name (c->dstFormat));
205
206     return f;
207 }