predict-c.c

从服务器上下的x264编码器C源码……希望对大家有帮助……这个是09年4月的

       + src[-1 + 2*FDEC_STRIDE]
       + src[-1 + 3*FDEC_STRIDE];

    int s3 = 2
       + src[-1 + 4*FDEC_STRIDE]
       + src[-1 + 5*FDEC_STRIDE]
       + src[-1 + 6*FDEC_STRIDE]
       + src[-1 + 7*FDEC_STRIDE];

    predict_8x8c_dc_core_mmxext( src, s2, s3 );
}

#ifdef ARCH_X86_64
static void predict_8x8c_dc_left( uint8_t *src )
{
    int y;
    uint32_t s0 = 0, s1 = 0;
    uint64_t dc0, dc1;

    for( y = 0; y < 4; y++ )
    {
        s0 += src[y * FDEC_STRIDE     - 1];
        s1 += src[(y+4) * FDEC_STRIDE - 1];
    }
    dc0 = (( s0 + 2 ) >> 2) * 0x0101010101010101ULL;
    dc1 = (( s1 + 2 ) >> 2) * 0x0101010101010101ULL;

    for( y = 0; y < 4; y++ )
    {
        *(uint64_t*)src = dc0;
        src += FDEC_STRIDE;
    }
    for( y = 0; y < 4; y++ )
    {
        *(uint64_t*)src = dc1;
        src += FDEC_STRIDE;
    }

}
#endif

/****************************************************************************
 * 8x8 prediction for intra luma block
 ****************************************************************************/

#define PL(y) \
    UNUSED int l##y = edge[14-y];
#define PT(x) \
    UNUSED int t##x = edge[16+x];
#define PREDICT_8x8_LOAD_TOPLEFT \
    int lt = edge[15];
#define PREDICT_8x8_LOAD_LEFT \
    PL(0) PL(1) PL(2) PL(3) PL(4) PL(5) PL(6) PL(7)
#define PREDICT_8x8_LOAD_TOP \
    PT(0) PT(1) PT(2) PT(3) PT(4) PT(5) PT(6) PT(7)

#define PREDICT_8x8_DC(v) \
    int y; \
    for( y = 0; y < 8; y++ ) { \
        ((uint32_t*)src)[0] = \
        ((uint32_t*)src)[1] = v; \
        src += FDEC_STRIDE; \
    }

#define SRC(x,y) src[(x)+(y)*FDEC_STRIDE]

#ifndef ARCH_X86_64
static void predict_8x8_vr_mmxext( uint8_t *src, uint8_t edge[33] )
{
    predict_8x8_vr_core_mmxext( src, edge );
    {
        PREDICT_8x8_LOAD_TOPLEFT
        PREDICT_8x8_LOAD_LEFT
        SRC(0,2)=SRC(1,4)=SRC(2,6)= (l1 + 2*l0 + lt + 2) >> 2;
        SRC(0,3)=SRC(1,5)=SRC(2,7)= (l2 + 2*l1 + l0 + 2) >> 2;
        SRC(0,4)=SRC(1,6)= (l3 + 2*l2 + l1 + 2) >> 2;
        SRC(0,5)=SRC(1,7)= (l4 + 2*l3 + l2 + 2) >> 2;
        SRC(0,6)= (l5 + 2*l4 + l3 + 2) >> 2;
        SRC(0,7)= (l6 + 2*l5 + l4 + 2) >> 2;
    }
}
#endif

#define SUMSUB(a,b,c,d,e,f,g,h)\
    t=a; a+=b; b-=t;\
    t=c; c+=d; d-=t;\
    t=e; e+=f; f-=t;\
    t=g; g+=h; h-=t;

#define INTRA_SA8D_X3(cpu) \
void x264_intra_sa8d_x3_8x8_##cpu( uint8_t *fenc, uint8_t edge[33], int res[3] )\
{\
    PREDICT_8x8_LOAD_TOP\
    PREDICT_8x8_LOAD_LEFT\
    int t;\
    DECLARE_ALIGNED_16( int16_t sa8d_1d[2][8] );\
    SUMSUB(l0,l4,l1,l5,l2,l6,l3,l7);\
    SUMSUB(l0,l2,l1,l3,l4,l6,l5,l7);\
    SUMSUB(l0,l1,l2,l3,l4,l5,l6,l7);\
    sa8d_1d[0][0] = l0;\
    sa8d_1d[0][1] = l1;\
    sa8d_1d[0][2] = l2;\
    sa8d_1d[0][3] = l3;\
    sa8d_1d[0][4] = l4;\
    sa8d_1d[0][5] = l5;\
    sa8d_1d[0][6] = l6;\
    sa8d_1d[0][7] = l7;\
    SUMSUB(t0,t4,t1,t5,t2,t6,t3,t7);\
    SUMSUB(t0,t2,t1,t3,t4,t6,t5,t7);\
    SUMSUB(t0,t1,t2,t3,t4,t5,t6,t7);\
    sa8d_1d[1][0] = t0;\
    sa8d_1d[1][1] = t1;\
    sa8d_1d[1][2] = t2;\
    sa8d_1d[1][3] = t3;\
    sa8d_1d[1][4] = t4;\
    sa8d_1d[1][5] = t5;\
    sa8d_1d[1][6] = t6;\
    sa8d_1d[1][7] = t7;\
    x264_intra_sa8d_x3_8x8_core_##cpu( fenc, sa8d_1d, res );\
}

#ifdef ARCH_X86_64
INTRA_SA8D_X3(sse2)
INTRA_SA8D_X3(ssse3)
#else
INTRA_SA8D_X3(mmxext)
#endif

/****************************************************************************
 * Exported functions:
 ****************************************************************************/
void x264_predict_16x16_init_mmx( int cpu, x264_predict_t pf[7] )
{
    if( !(cpu&X264_CPU_MMX) )
        return;
    pf[I_PRED_16x16_V]       = predict_16x16_v_mmx;
    if( !(cpu&X264_CPU_MMXEXT) )
        return;
    pf[I_PRED_16x16_DC]      = predict_16x16_dc_mmxext;
    pf[I_PRED_16x16_DC_TOP]  = predict_16x16_dc_top_mmxext;
    pf[I_PRED_16x16_DC_LEFT] = predict_16x16_dc_left_mmxext;
#ifndef ARCH_X86_64
    pf[I_PRED_16x16_P]       = predict_16x16_p_mmxext;
#endif
    pf[I_PRED_16x16_H]       = predict_16x16_h_mmxext;
    if( !(cpu&X264_CPU_SSE2) )
        return;
    pf[I_PRED_16x16_DC]     = predict_16x16_dc_sse2;
    pf[I_PRED_16x16_V]      = predict_16x16_v_sse2;
    if( cpu&X264_CPU_SSE2_IS_SLOW )
        return;
    pf[I_PRED_16x16_DC_TOP] = predict_16x16_dc_top_sse2;
    pf[I_PRED_16x16_DC_LEFT] = predict_16x16_dc_left_sse2;
    pf[I_PRED_16x16_P]      = predict_16x16_p_sse2;
    if( !(cpu&X264_CPU_SSSE3) )
        return;
    pf[I_PRED_16x16_H]      = predict_16x16_h_ssse3;
#ifdef __GNUC__
    pf[I_PRED_16x16_P]      = predict_16x16_p_ssse3;
#endif
}

void x264_predict_8x8c_init_mmx( int cpu, x264_predict_t pf[7] )
{
    if( !(cpu&X264_CPU_MMX) )
        return;
#ifdef ARCH_X86_64
    pf[I_PRED_CHROMA_DC_LEFT] = predict_8x8c_dc_left;
#endif
    pf[I_PRED_CHROMA_V]       = predict_8x8c_v_mmx;
    if( !(cpu&X264_CPU_MMXEXT) )
        return;
    pf[I_PRED_CHROMA_DC_TOP]  = predict_8x8c_dc_top_mmxext;
    pf[I_PRED_CHROMA_H]       = predict_8x8c_h_mmxext;
#ifndef ARCH_X86_64
    pf[I_PRED_CHROMA_P]       = predict_8x8c_p_mmxext;
#endif
    pf[I_PRED_CHROMA_DC]      = predict_8x8c_dc_mmxext;
    if( !(cpu&X264_CPU_SSE2) )
        return;
    pf[I_PRED_CHROMA_P]       = predict_8x8c_p_sse2;
    if( !(cpu&X264_CPU_SSSE3) )
        return;
    pf[I_PRED_CHROMA_H]       = predict_8x8c_h_ssse3;
#ifdef __GNUC__
    pf[I_PRED_CHROMA_P]       = predict_8x8c_p_ssse3;
#endif
}

void x264_predict_8x8_init_mmx( int cpu, x264_predict8x8_t pf[12], x264_predict_8x8_filter_t *predict_8x8_filter )
{
    if( !(cpu&X264_CPU_MMXEXT) )
        return;
    pf[I_PRED_8x8_V]   = predict_8x8_v_mmxext;
    pf[I_PRED_8x8_H]   = predict_8x8_h_mmxext;
    pf[I_PRED_8x8_DC]  = predict_8x8_dc_mmxext;
    pf[I_PRED_8x8_DC_TOP] = predict_8x8_dc_top_mmxext;
    pf[I_PRED_8x8_DC_LEFT]= predict_8x8_dc_left_mmxext;
    pf[I_PRED_8x8_HD]   = predict_8x8_hd_mmxext;
    *predict_8x8_filter = predict_8x8_filter_mmxext;
#ifdef ARCH_X86
    pf[I_PRED_8x8_DDL] = predict_8x8_ddl_mmxext;
    pf[I_PRED_8x8_DDR] = predict_8x8_ddr_mmxext;
    pf[I_PRED_8x8_VR]  = predict_8x8_vr_mmxext;
    pf[I_PRED_8x8_HU]   = predict_8x8_hu_mmxext;
#endif
    if( !(cpu&X264_CPU_SSE2) )
        return;
    pf[I_PRED_8x8_DDL] = predict_8x8_ddl_sse2;
    pf[I_PRED_8x8_VL]  = predict_8x8_vl_sse2;
    pf[I_PRED_8x8_VR]  = predict_8x8_vr_sse2;
    pf[I_PRED_8x8_DDR] = predict_8x8_ddr_sse2;
    pf[I_PRED_8x8_HD]   = predict_8x8_hd_sse2;
    pf[I_PRED_8x8_HU]   = predict_8x8_hu_sse2;
    if( !(cpu&X264_CPU_SSSE3) )
        return;
    pf[I_PRED_8x8_HD]   = predict_8x8_hd_ssse3;
    pf[I_PRED_8x8_HU]   = predict_8x8_hu_ssse3;
    *predict_8x8_filter = predict_8x8_filter_ssse3;
}

void x264_predict_4x4_init_mmx( int cpu, x264_predict_t pf[12] )
{
    if( !(cpu&X264_CPU_MMXEXT) )
        return;
    pf[I_PRED_4x4_VR]  = predict_4x4_vr_mmxext;
    pf[I_PRED_4x4_DDL] = predict_4x4_ddl_mmxext;
    pf[I_PRED_4x4_VL]  = predict_4x4_vl_mmxext;
    pf[I_PRED_4x4_DC]  = predict_4x4_dc_mmxext;
    pf[I_PRED_4x4_DDR] = predict_4x4_ddr_mmxext;
    pf[I_PRED_4x4_HD]  = predict_4x4_hd_mmxext;
    pf[I_PRED_4x4_HU]  = predict_4x4_hu_mmxext;
    if( !(cpu&X264_CPU_SSSE3) )
        return;
    pf[I_PRED_4x4_DDR] = predict_4x4_ddr_ssse3;
    pf[I_PRED_4x4_VR]  = predict_4x4_vr_ssse3;
    pf[I_PRED_4x4_HD]  = predict_4x4_hd_ssse3;
}