mc.c

图象压缩程序

/*****************************************************************************
 * mc.c: h264 encoder library (Motion Compensation)
 *****************************************************************************
 * Copyright (C) 2003 Laurent Aimar
 * $Id: mc.c,v 1.1 2003/11/09 23:25:04 fenrir Exp $
 *
 * Authors: Laurent Aimar <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>

#include "../mc.h"
#include "../clip1.h"
#include "mc.h"

#define UNUSED_UINT64( foo ) \
    static const uint64_t foo __asm__ (#foo)  __attribute__((unused))

UNUSED_UINT64( x264_w0x10 ) = 0x0010001000100010ULL;


static inline int x264_tapfilter( uint8_t *pix, int i_pix_next )
{
    return pix[-2*i_pix_next] - 5*pix[-1*i_pix_next] + 20*(pix[0] + pix[1*i_pix_next]) - 5*pix[ 2*i_pix_next] + pix[ 3*i_pix_next];
}
static inline int x264_tapfilter1( uint8_t *pix )
{
    return pix[-2] - 5*pix[-1] + 20*(pix[0] + pix[1]) - 5*pix[ 2] + pix[ 3];
}

static inline void pixel_avg_w4( uint8_t *dst,  int i_dst_stride,
                                 uint8_t *src1, int i_src1_stride,
                                 uint8_t *src2, int i_src2_stride,
                                 int i_height )
{
    int x, y;
    for( y = 0; y < i_height; y++ )
    {
        for( x = 0; x < 4; x++ )
        {
            dst[x] = ( src1[x] + src2[x] + 1 ) >> 1;
        }
        dst  += i_dst_stride;
        src1 += i_src1_stride;
        src2 += i_src2_stride;
    }
}
static inline void pixel_avg_w8( uint8_t *dst,  int i_dst_stride,
                                 uint8_t *src1, int i_src1_stride,
                                 uint8_t *src2, int i_src2_stride,
                                 int i_height )
{
    int y;
    for( y = 0; y < i_height; y++ )
    {
        asm volatile(
            "movq (%1), %%mm0\n"
            "movq (%2), %%mm1\n"
            "pavgb %%mm1, %%mm0\n"
            "movq %%mm0, (%0)\n"
            : : "r"(dst), "r"(src1), "r"(src2)
            );
        dst  += i_dst_stride;
        src1 += i_src1_stride;
        src2 += i_src2_stride;
    }
}
static inline void pixel_avg_w16( uint8_t *dst,  int i_dst_stride,
                                  uint8_t *src1, int i_src1_stride,
                                  uint8_t *src2, int i_src2_stride,
                                  int i_height )
{
    int y;

    for( y = 0; y < i_height; y++ )
    {
        asm volatile(
            "movq (%1), %%mm0\n"
            "movq 8(%1), %%mm2\n"
            "movq (%2), %%mm1\n"
            "movq 8(%2), %%mm3\n"

            "pavgb %%mm1, %%mm0\n"
            "movq %%mm0, (%0)\n"
            "pavgb %%mm3, %%mm2\n"
            "movq %%mm2, 8(%0)\n"
            : : "r"(dst), "r"(src1), "r"(src2)
            );
        dst  += i_dst_stride;
        src1 += i_src1_stride;
        src2 += i_src2_stride;
    }
}

typedef void (*pf_mc_t)(uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height );

/*****************************************************************************
 * MC with width == 4 (height <= 8)
 *****************************************************************************/
static void mc_copy_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    int y;

    for( y = 0; y < i_height; y++ )
    {
        memcpy( dst, src, 4 );

        src += i_src_stride;
        dst += i_dst_stride;
    }
}
static inline void mc_hh_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    int x, y;

    for( y = 0; y < i_height; y++ )
    {
        for( x = 0; x < 4; x++ )
        {
            dst[x] = x264_mc_clip1( ( x264_tapfilter1( &src[x] ) + 16 ) >> 5 );
        }
        src += i_src_stride;
        dst += i_dst_stride;
    }
}
static inline void mc_hv_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    int y;

    src -= 2 * i_src_stride;

    asm volatile(
        "pxor %%mm7,        %%mm7\n"
        "movq x264_w0x10,   %%mm4\n" : : );

    for( y = 0; y < i_height; y++ )
    {
        asm volatile(
            "leal   (%0, %1),   %%eax\n"

            "movd       (%0),   %%mm0\n"    /* load pix-2 */
            "punpcklbw  %%mm7,  %%mm0\n"

            "movd       (%%eax),%%mm1\n"    /* load pix-1 */
            "punpcklbw  %%mm7,  %%mm1\n"
            "psubw      %%mm1,  %%mm0\n"
            "psllw      $2,     %%mm1\n"
            "psubw      %%mm1,  %%mm0\n"

            "movd       (%%eax,%1),%%mm1\n"  /* load pix */
            "punpcklbw  %%mm7,  %%mm1\n"
            "psllw      $2,     %%mm1\n"
            "paddw      %%mm1,  %%mm0\n"
            "psllw      $2,     %%mm1\n"
            "paddw      %%mm1,  %%mm0\n"

            "movd       (%%eax,%1,2),%%mm1\n"  /* load pix+1 */
            "punpcklbw  %%mm7,  %%mm1\n"
            "psllw      $2,     %%mm1\n"
            "paddw      %%mm1,  %%mm0\n"
            "psllw      $2,     %%mm1\n"
            "paddw      %%mm1,  %%mm0\n"

            "movd       (%0,%1,4),%%mm1\n"  /* load pix+2 */
            "punpcklbw  %%mm7,  %%mm1\n"
            "psubw      %%mm1,  %%mm0\n"
            "psllw      $2,     %%mm1\n"
            "psubw      %%mm1,  %%mm0\n"

            "movd       (%%eax,%1,4),%%mm1\n"  /* load pix+3 */
            "punpcklbw  %%mm7,  %%mm1\n"
            "paddw      %%mm1,  %%mm0\n"

            "paddw      %%mm4,  %%mm0\n"
            "psraw      $5,     %%mm0\n"

            "packuswb   %%mm7,  %%mm0\n"
            "movd       %%mm0,  (%2)\n"
            : : "r"(src), "r"(i_src_stride), "r"(dst) : "%eax" );

        src += i_src_stride;
        dst += i_dst_stride;
    }
}

static inline void mc_hc_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
#if 0
    uint8_t *out;
    uint8_t *pix;
    int x, y;

    for( x = 0; x < 4; x++ )
    {
        int tap[6];

        pix = &src[x];
        out = &dst[x];

        tap[0] = x264_tapfilter1( &pix[-2*i_src_stride] );
        tap[1] = x264_tapfilter1( &pix[-1*i_src_stride] );
        tap[2] = x264_tapfilter1( &pix[ 0*i_src_stride] );
        tap[3] = x264_tapfilter1( &pix[ 1*i_src_stride] );
        tap[4] = x264_tapfilter1( &pix[ 2*i_src_stride] );

        for( y = 0; y < i_height; y++ )
        {
            tap[5] = x264_tapfilter1( &pix[ 3*i_src_stride] );

            *out = x264_mc_clip1( ( tap[0] - 5*tap[1] + 20 * tap[2] + 20 * tap[3] -5*tap[4] + tap[5] + 512 ) >> 10 );

            /* Next line */
            pix += i_src_stride;
            out += i_dst_stride;
            tap[0] = tap[1];
            tap[1] = tap[2];
            tap[2] = tap[3];
            tap[3] = tap[4];
            tap[4] = tap[5];
        }
    }
#else
    int i, x, y;

    for( y = 0; y < i_height; y++ )
    {
        int16_t tap[5+4];

        for( i = 0; i < 5+4; i++ )
        {
            tap[i] = x264_tapfilter( &src[-2+i], i_src_stride );
        }

        for( x = 0; x < 4; x++ )
        {
            dst[x] = x264_mc_clip1( ( tap[0+x] - 5*tap[1+x] + 20 * tap[2+x] + 20 * tap[3+x] -5*tap[4+x] + tap[5+x] + 512 ) >> 10 );
        }

        src += i_src_stride;
        dst += i_dst_stride;
    }
#endif
}

/* mc I+H */
static void mc_xy10_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp[4*8];
    mc_hh_w4( src, i_src_stride, tmp, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, src, i_src_stride, tmp, 4, i_height );
}
static void mc_xy30_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp[4*8];
    mc_hh_w4( src, i_src_stride, tmp, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, src+1, i_src_stride, tmp, 4, i_height );
}
/* mc I+V */
static void mc_xy01_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp[4*8];
    mc_hv_w4( src, i_src_stride, tmp, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, src, i_src_stride, tmp, 4, i_height );
}
static void mc_xy03_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp[4*8];
    mc_hv_w4( src, i_src_stride, tmp, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, src+i_src_stride, i_src_stride, tmp, 4, i_height );
}
/* H+V */
static void mc_xy11_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hv_w4( src, i_src_stride, tmp1, 4, i_height );
    mc_hh_w4( src, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy31_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hv_w4( src+1, i_src_stride, tmp1, 4, i_height );
    mc_hh_w4( src,   i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy13_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hv_w4( src,              i_src_stride, tmp1, 4, i_height );
    mc_hh_w4( src+i_src_stride, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy33_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hv_w4( src+1,            i_src_stride, tmp1, 4, i_height );
    mc_hh_w4( src+i_src_stride, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy21_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hc_w4( src, i_src_stride, tmp1, 4, i_height );
    mc_hh_w4( src, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy12_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hc_w4( src, i_src_stride, tmp1, 4, i_height );
    mc_hv_w4( src, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy32_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hc_w4( src,   i_src_stride, tmp1, 4, i_height );
    mc_hv_w4( src+1, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}
static void mc_xy23_w4( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    uint8_t tmp1[4*8];
    uint8_t tmp2[4*8];

    mc_hc_w4( src,              i_src_stride, tmp1, 4, i_height );
    mc_hh_w4( src+i_src_stride, i_src_stride, tmp2, 4, i_height );
    pixel_avg_w4( dst, i_dst_stride, tmp1, 4, tmp2, 4, i_height );
}


/*****************************************************************************
 * MC with width == 8 (height <= 16)
 *****************************************************************************/
static void mc_copy_w8( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    int y;

    for( y = 0; y < i_height; y++ )
    {
        memcpy( dst, src, 8 );

        src += i_src_stride;
        dst += i_dst_stride;
    }
}
static inline void mc_hh_w8( uint8_t *src, int i_src_stride, uint8_t *dst, int i_dst_stride, int i_height )
{
    int x, y;

    for( y = 0; y < i_height; y++ )
    {
        for( x = 0; x < 8; x++ )
        {
            dst[x] = x264_mc_clip1( ( x264_tapfilter1( &src[x] ) + 16 ) >> 5 );
        }