libswscale/swscale_bfin.c

   1 /*
   2  * Copyright (C) 2007 Marc Hoffman <marc.hoffman@analog.com>
   3  *
   4  * Blackfin Software Video SCALER Operations
   5  *
   6  * This file is part of FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <inttypes.h>
  27 #include <assert.h>
  28 #include "config.h"
  29 #ifdef HAVE_MALLOC_H
  30 #include <malloc.h>
  31 #endif
  32 #include <unistd.h>
  33 #include "rgb2rgb.h"
  34 #include "swscale.h"
  35 #include "swscale_internal.h"
  36
  37 #ifdef __FDPIC__
  38 #define L1CODE __attribute__ ((l1_text))
  39 #else
  40 #define L1CODE
  41 #endif
  42
  43 extern int ff_bfin_uyvytoyv12 (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
  44                                long width, long height,
  45                                long lumStride, long chromStride, long srcStride) L1CODE;
  46
  47 extern int ff_bfin_yuyvtoyv12 (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
  48                                long width, long height,
  49                                long lumStride, long chromStride, long srcStride) L1CODE;
  50
  51 static int uyvytoyv12_unscaled (SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
  52                                 int srcSliceH, uint8_t* dst[], int dstStride[])
  53 {
  54     uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
  55     uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
  56     uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
  57     uint8_t *ip   = src[0] + srcStride[0]*srcSliceY;
  58     int w         = dstStride[0];
  59
  60     ff_bfin_uyvytoyv12 (ip, dsty, dstu, dstv, w, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
  61
  62     return srcSliceH;
  63 }
  64
  65 static int yuyvtoyv12_unscaled (SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
  66                                 int srcSliceH, uint8_t* dst[], int dstStride[])
  67 {
  68     uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
  69     uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
  70     uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
  71     uint8_t *ip   = src[0] + srcStride[0]*srcSliceY;
  72     int w         = dstStride[0];
  73
  74     ff_bfin_yuyvtoyv12 (ip, dsty, dstu, dstv, w, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
  75
  76     return srcSliceH;
  77 }
  78
  79
  80 void ff_bfin_get_unscaled_swscale (SwsContext *c)
  81 {
  82     SwsFunc swScale = c->swScale;
  83     if (c->flags & SWS_CPU_CAPS_BFIN)
  84         if (c->dstFormat == PIX_FMT_YUV420P)
  85             if (c->srcFormat == PIX_FMT_UYVY422) {
  86                 av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized uyvytoyv12_unscaled\n");
  87                 c->swScale = uyvytoyv12_unscaled;
  88             }
  89         if (c->dstFormat == PIX_FMT_YUV420P)
  90             if (c->srcFormat == PIX_FMT_YUYV422) {
  91                 av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized yuyvtoyv12_unscaled\n");
  92                 c->swScale = yuyvtoyv12_unscaled;
  93             }
  94 }