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ffmpeg / libswscale / bfin / yuv2rgb_bfin.c @ e62bd367

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/*
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 * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
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 *
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 * Blackfin video color space converter operations
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 * convert I420 YV12 to RGB in various formats
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <assert.h>
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#include "config.h"
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#include <unistd.h>
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#include "libswscale/rgb2rgb.h"
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#include "libswscale/swscale.h"
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#include "libswscale/swscale_internal.h"
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#if defined(__FDPIC__) && CONFIG_SRAM
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#define L1CODE __attribute__ ((l1_text))
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#else
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#define L1CODE
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#endif
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void ff_bfin_yuv2rgb555_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
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                             int w, uint32_t *coeffs) L1CODE;
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void ff_bfin_yuv2rgb565_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
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                             int w, uint32_t *coeffs) L1CODE;
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void ff_bfin_yuv2rgb24_line(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
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                            int w, uint32_t *coeffs) L1CODE;
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typedef void (* ltransform)(uint8_t *Y, uint8_t *U, uint8_t *V, uint8_t *out,
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                            int w, uint32_t *coeffs);
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static void bfin_prepare_coefficients(SwsContext *c, int rgb, int masks)
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{
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    int oy;
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    oy      = c->yOffset&0xffff;
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    oy      = oy >> 3; // keep everything U8.0 for offset calculation
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    c->oc   = 128*0x01010101U;
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    c->oy   =  oy*0x01010101U;
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    /* copy 64bit vector coeffs down to 32bit vector coeffs */
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    c->cy  = c->yCoeff;
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    c->zero = 0;
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    if (rgb) {
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        c->crv = c->vrCoeff;
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        c->cbu = c->ubCoeff;
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        c->cgu = c->ugCoeff;
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        c->cgv = c->vgCoeff;
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    } else {
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        c->crv = c->ubCoeff;
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        c->cbu = c->vrCoeff;
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        c->cgu = c->vgCoeff;
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        c->cgv = c->ugCoeff;
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    }
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    if (masks == 555) {
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        c->rmask = 0x001f * 0x00010001U;
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        c->gmask = 0x03e0 * 0x00010001U;
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        c->bmask = 0x7c00 * 0x00010001U;
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    } else if (masks == 565) {
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        c->rmask = 0x001f * 0x00010001U;
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        c->gmask = 0x07e0 * 0x00010001U;
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        c->bmask = 0xf800 * 0x00010001U;
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    }
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}
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static int core_yuv420_rgb(SwsContext *c,
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                           uint8_t **in, int *instrides,
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                           int srcSliceY, int srcSliceH,
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                           uint8_t **oplanes, int *outstrides,
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                           ltransform lcscf, int rgb, int masks)
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{
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    uint8_t *py,*pu,*pv,*op;
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    int w  = instrides[0];
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    int h2 = srcSliceH>>1;
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    int i;
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    bfin_prepare_coefficients(c, rgb, masks);
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    py = in[0];
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    pu = in[1+(1^rgb)];
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    pv = in[1+(0^rgb)];
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    op = oplanes[0] + srcSliceY*outstrides[0];
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    for (i=0;i<h2;i++) {
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        lcscf(py, pu, pv, op, w, &c->oy);
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        py += instrides[0];
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        op += outstrides[0];
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        lcscf(py, pu, pv, op, w, &c->oy);
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        py += instrides[0];
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        pu += instrides[1];
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        pv += instrides[2];
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        op += outstrides[0];
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    }
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    return srcSliceH;
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}
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static int bfin_yuv420_rgb555(SwsContext *c,
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                              uint8_t **in, int *instrides,
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                              int srcSliceY, int srcSliceH,
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                              uint8_t **oplanes, int *outstrides)
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{
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    return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
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                           outstrides, ff_bfin_yuv2rgb555_line, 1, 555);
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}
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static int bfin_yuv420_bgr555(SwsContext *c,
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                              uint8_t **in, int *instrides,
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                              int srcSliceY, int srcSliceH,
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                              uint8_t **oplanes, int *outstrides)
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{
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    return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
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                           outstrides, ff_bfin_yuv2rgb555_line, 0, 555);
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}
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static int bfin_yuv420_rgb24(SwsContext *c,
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                             uint8_t **in, int *instrides,
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                             int srcSliceY, int srcSliceH,
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                             uint8_t **oplanes, int *outstrides)
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{
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    return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
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                           outstrides, ff_bfin_yuv2rgb24_line, 1, 888);
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}
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static int bfin_yuv420_bgr24(SwsContext *c,
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                             uint8_t **in, int *instrides,
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                             int srcSliceY, int srcSliceH,
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                             uint8_t **oplanes, int *outstrides)
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{
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    return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
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                           outstrides, ff_bfin_yuv2rgb24_line, 0, 888);
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}
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static int bfin_yuv420_rgb565(SwsContext *c,
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                              uint8_t **in, int *instrides,
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                              int srcSliceY, int srcSliceH,
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                              uint8_t **oplanes, int *outstrides)
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{
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    return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
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                           outstrides, ff_bfin_yuv2rgb565_line, 1, 565);
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}
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static int bfin_yuv420_bgr565(SwsContext *c,
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                              uint8_t **in, int *instrides,
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                              int srcSliceY, int srcSliceH,
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                              uint8_t **oplanes, int *outstrides)
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{
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    return core_yuv420_rgb(c, in, instrides, srcSliceY, srcSliceH, oplanes,
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                           outstrides, ff_bfin_yuv2rgb565_line, 0, 565);
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}
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SwsFunc ff_yuv2rgb_get_func_ptr_bfin(SwsContext *c)
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{
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    SwsFunc f;
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    switch(c->dstFormat) {
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    case PIX_FMT_RGB555: f = bfin_yuv420_rgb555; break;
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    case PIX_FMT_BGR555: f = bfin_yuv420_bgr555; break;
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    case PIX_FMT_RGB565: f = bfin_yuv420_rgb565; break;
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    case PIX_FMT_BGR565: f = bfin_yuv420_bgr565; break;
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    case PIX_FMT_RGB24:  f = bfin_yuv420_rgb24;  break;
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    case PIX_FMT_BGR24:  f = bfin_yuv420_bgr24;  break;
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    default:
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        return 0;
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    }
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    av_log(c, AV_LOG_INFO, "BlackFin accelerated color space converter %s\n",
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           sws_format_name (c->dstFormat));
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    return f;
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}