git.sesse.net Git - ffmpeg/blob - 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 <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <inttypes.h>
  28 #include <assert.h>
  29 #include <unistd.h>
  30 #include "libavutil/pixdesc.h"
  31
  32 #include "config.h"
  33 #include "libswscale/rgb2rgb.h"
  34 #include "libswscale/swscale.h"
  35 #include "libswscale/swscale_internal.h"
  36
  37 #if defined(__FDPIC__) && CONFIG_SRAM
  38 #define L1CODE __attribute__((l1_text))
  39 #else
  40 #define L1CODE
  41 #endif
  42
  43 void ff_bfin_yuv2rgb555_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  44                              int w, uint32_t *coeffs) L1CODE;
  45
  46 void ff_bfin_yuv2rgb565_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  47                              int w, uint32_t *coeffs) L1CODE;
  48
  49 void ff_bfin_yuv2rgb24_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  50                             int w, uint32_t *coeffs) L1CODE;
  51
  52 typedef void (*ltransform)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  53                            int w, uint32_t *coeffs);
  54
  55 static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
  56 {
  57     int oy;
  58     oy = c->yOffset & 0xffff;
  59     oy = oy >> 3;      // keep everything U8.0 for offset calculation
  60
  61     c->oc = 128 * 0x01010101U;
  62     c->oy = oy * 0x01010101U;
  63
  64     /* copy 64bit vector coeffs down to 32bit vector coeffs */
  65     c->cy   = c->yCoeff;
  66     c->zero = 0;
  67
  68     if (rgb) {
  69         c->crv = c->vrCoeff;
  70         c->cbu = c->ubCoeff;
  71         c->cgu = c->ugCoeff;
  72         c->cgv = c->vgCoeff;
  73     } else {
  74         c->crv = c->ubCoeff;
  75         c->cbu = c->vrCoeff;
  76         c->cgu = c->vgCoeff;
  77         c->cgv = c->ugCoeff;
  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, uint8_t **in, int *instrides,
  92                            int srcSliceY, int srcSliceH, uint8_t **oplanes,
  93                            int *outstrides, ltransform lcscf,
  94                            int rgb, int masks)
  95 {
  96     uint8_t *py, *pu, *pv, *op;
  97     int w  = instrides[0];
  98     int h2 = srcSliceH >> 1;
  99     int i;
 100
 101     bfin_prepare_coefficients(c, rgb, masks);
 102
 103     py = in[0];
 104     pu = in[1 + (1 ^ rgb)];
 105     pv = in[1 + (0 ^ rgb)];
 106
 107     op = oplanes[0] + srcSliceY * outstrides[0];
 108
 109     for (i = 0; i < h2; i++) {
 110         lcscf(py, pu, pv, op, w, &c->oy);
 111
 112         py += instrides[0];
 113         op += outstrides[0];
 114
 115         lcscf(py, pu, pv, op, w, &c->oy);
 116
 117         py += instrides[0];
 118         pu += instrides[1];
 119         pv += instrides[2];
 120         op += outstrides[0];
 121     }
 122
 123     return srcSliceH;
 124 }
 125
 126 static int bfin_yuv420_rgb555(SwsContext *c, uint8_t **in, int *instrides,
 127                               int srcSliceY, int srcSliceH,
 128                               uint8_t **oplanes, int *outstrides)
 129 {
 130     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 131                            outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
 132 }
 133
 134 static int bfin_yuv420_bgr555(SwsContext *c, 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,
 139                            outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
 140 }
 141
 142 static int bfin_yuv420_rgb24(SwsContext *c, 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,
 147                            outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
 148 }
 149
 150 static int bfin_yuv420_bgr24(SwsContext *c, uint8_t **in, int *instrides,
 151                              int srcSliceY, int srcSliceH,
 152                              uint8_t **oplanes, int *outstrides)
 153 {
 154     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 155                            outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
 156 }
 157
 158 static int bfin_yuv420_rgb565(SwsContext *c, uint8_t **in, int *instrides,
 159                               int srcSliceY, int srcSliceH,
 160                               uint8_t **oplanes, int *outstrides)
 161 {
 162     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 163                            outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
 164 }
 165
 166 static int bfin_yuv420_bgr565(SwsContext *c, 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, 0, 565);
 172 }
 173
 174 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c)
 175 {
 176     SwsFunc f;
 177
 178     switch (c->dstFormat) {
 179     case PIX_FMT_RGB555:
 180         f = bfin_yuv420_rgb555;
 181         break;
 182     case PIX_FMT_BGR555:
 183         f = bfin_yuv420_bgr555;
 184         break;
 185     case PIX_FMT_RGB565:
 186         f = bfin_yuv420_rgb565;
 187         break;
 188     case PIX_FMT_BGR565:
 189         f = bfin_yuv420_bgr565;
 190         break;
 191     case PIX_FMT_RGB24:
 192         f = bfin_yuv420_rgb24;
 193         break;
 194     case PIX_FMT_BGR24:
 195         f = bfin_yuv420_bgr24;
 196         break;
 197     default:
 198         return 0;
 199     }
 200
 201     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
 202            av_get_pix_fmt_name(c->dstFormat));
 203
 204     return f;
 205 }