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 Libav.
   8  *
   9  * Libav 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  * Libav 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 Libav; 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
  31 #include "config.h"
  32 #include "libswscale/rgb2rgb.h"
  33 #include "libswscale/swscale.h"
  34 #include "libswscale/swscale_internal.h"
  35
  36 #if defined(__FDPIC__) && CONFIG_SRAM
  37 #define L1CODE __attribute__((l1_text))
  38 #else
  39 #define L1CODE
  40 #endif
  41
  42 void ff_bfin_yuv2rgb555_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  43                              int w, uint32_t *coeffs) L1CODE;
  44
  45 void ff_bfin_yuv2rgb565_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  46                              int w, uint32_t *coeffs) L1CODE;
  47
  48 void ff_bfin_yuv2rgb24_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  49                             int w, uint32_t *coeffs) L1CODE;
  50
  51 typedef void (*ltransform)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
  52                            int w, uint32_t *coeffs);
  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     if (masks == 555) {
  80         c->rmask = 0x001f * 0x00010001U;
  81         c->gmask = 0x03e0 * 0x00010001U;
  82         c->bmask = 0x7c00 * 0x00010001U;
  83     } else if (masks == 565) {
  84         c->rmask = 0x001f * 0x00010001U;
  85         c->gmask = 0x07e0 * 0x00010001U;
  86         c->bmask = 0xf800 * 0x00010001U;
  87     }
  88 }
  89
  90 static int core_yuv420_rgb(SwsContext *c, uint8_t **in, int *instrides,
  91                            int srcSliceY, int srcSliceH, uint8_t **oplanes,
  92                            int *outstrides, ltransform lcscf,
  93                            int rgb, int masks)
  94 {
  95     uint8_t *py, *pu, *pv, *op;
  96     int w  = instrides[0];
  97     int h2 = srcSliceH >> 1;
  98     int i;
  99
 100     bfin_prepare_coefficients(c, rgb, masks);
 101
 102     py = in[0];
 103     pu = in[1 + (1 ^ rgb)];
 104     pv = in[1 + (0 ^ rgb)];
 105
 106     op = oplanes[0] + srcSliceY * outstrides[0];
 107
 108     for (i = 0; i < h2; i++) {
 109         lcscf(py, pu, pv, op, w, &c->oy);
 110
 111         py += instrides[0];
 112         op += outstrides[0];
 113
 114         lcscf(py, pu, pv, op, w, &c->oy);
 115
 116         py += instrides[0];
 117         pu += instrides[1];
 118         pv += instrides[2];
 119         op += outstrides[0];
 120     }
 121
 122     return srcSliceH;
 123 }
 124
 125 static int bfin_yuv420_rgb555(SwsContext *c, uint8_t **in, int *instrides,
 126                               int srcSliceY, int srcSliceH,
 127                               uint8_t **oplanes, int *outstrides)
 128 {
 129     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 130                            outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
 131 }
 132
 133 static int bfin_yuv420_bgr555(SwsContext *c, 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,
 138                            outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
 139 }
 140
 141 static int bfin_yuv420_rgb24(SwsContext *c, uint8_t **in, int *instrides,
 142                              int srcSliceY, int srcSliceH,
 143                              uint8_t **oplanes, int *outstrides)
 144 {
 145     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 146                            outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
 147 }
 148
 149 static int bfin_yuv420_bgr24(SwsContext *c, uint8_t **in, int *instrides,
 150                              int srcSliceY, int srcSliceH,
 151                              uint8_t **oplanes, int *outstrides)
 152 {
 153     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 154                            outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
 155 }
 156
 157 static int bfin_yuv420_rgb565(SwsContext *c, 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_yuv2rgb565_line, 1, 565);
 163 }
 164
 165 static int bfin_yuv420_bgr565(SwsContext *c, uint8_t **in, int *instrides,
 166                               int srcSliceY, int srcSliceH,
 167                               uint8_t **oplanes, int *outstrides)
 168 {
 169     return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
 170                            outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
 171 }
 172
 173 SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c)
 174 {
 175     SwsFunc f;
 176
 177     switch (c->dstFormat) {
 178     case PIX_FMT_RGB555:
 179         f = bfin_yuv420_rgb555;
 180         break;
 181     case PIX_FMT_BGR555:
 182         f = bfin_yuv420_bgr555;
 183         break;
 184     case PIX_FMT_RGB565:
 185         f = bfin_yuv420_rgb565;
 186         break;
 187     case PIX_FMT_BGR565:
 188         f = bfin_yuv420_bgr565;
 189         break;
 190     case PIX_FMT_RGB24:
 191         f = bfin_yuv420_rgb24;
 192         break;
 193     case PIX_FMT_BGR24:
 194         f = bfin_yuv420_bgr24;
 195         break;
 196     default:
 197         return 0;
 198     }
 199
 200     av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
 201            sws_format_name(c->dstFormat));
 202
 203     return f;
 204 }