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ffmpeg / libswscale / swscale_bfin.c @ 8a322796

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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 software video scaler operations
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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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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include <unistd.h>
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#include "rgb2rgb.h"
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#include "swscale.h"
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#include "swscale_internal.h"
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#ifdef __FDPIC__
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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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extern int ff_bfin_uyvytoyv12 (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
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                               long width, long height,
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                               long lumStride, long chromStride, long srcStride) L1CODE;
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extern int ff_bfin_yuyvtoyv12 (const uint8_t *src, uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
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                               long width, long height,
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                               long lumStride, long chromStride, long srcStride) L1CODE;
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static int uyvytoyv12_unscaled (SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
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                                int srcSliceH, uint8_t* dst[], int dstStride[])
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{
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    uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
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    uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
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    uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
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    uint8_t *ip   = src[0] + srcStride[0]*srcSliceY;
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    int w         = dstStride[0];
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    ff_bfin_uyvytoyv12 (ip, dsty, dstu, dstv, w, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
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    return srcSliceH;
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}
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static int yuyvtoyv12_unscaled (SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
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                                int srcSliceH, uint8_t* dst[], int dstStride[])
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{
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    uint8_t *dsty = dst[0] + dstStride[0]*srcSliceY;
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    uint8_t *dstu = dst[1] + dstStride[1]*srcSliceY/2;
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    uint8_t *dstv = dst[2] + dstStride[2]*srcSliceY/2;
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    uint8_t *ip   = src[0] + srcStride[0]*srcSliceY;
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    int w         = dstStride[0];
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    ff_bfin_yuyvtoyv12 (ip, dsty, dstu, dstv, w, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);
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    return srcSliceH;
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}
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void ff_bfin_get_unscaled_swscale (SwsContext *c)
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{
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    SwsFunc swScale = c->swScale;
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    if (c->flags & SWS_CPU_CAPS_BFIN)
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        if (c->dstFormat == PIX_FMT_YUV420P)
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            if (c->srcFormat == PIX_FMT_UYVY422) {
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                av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized uyvytoyv12_unscaled\n");
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                c->swScale = uyvytoyv12_unscaled;
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            }
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        if (c->dstFormat == PIX_FMT_YUV420P)
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            if (c->srcFormat == PIX_FMT_YUYV422) {
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                av_log (NULL, AV_LOG_VERBOSE, "selecting Blackfin optimized yuyvtoyv12_unscaled\n");
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                c->swScale = yuyvtoyv12_unscaled;
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            }
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}