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yuv2rgb_bfin.c
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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 }
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