frame.c.svn-base

H.264源码程序

                        &frame->plane[i][(i_height-1)*frame->i_stride[i]],
                        i_width + i_padx );
        }
    }
}


/* Deblocking filter */

static const int i_alpha_table[52] =
{
     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  4,  4,  5,  6,
     7,  8,  9, 10, 12, 13, 15, 17, 20, 22,
    25, 28, 32, 36, 40, 45, 50, 56, 63, 71,
    80, 90,101,113,127,144,162,182,203,226,
    255, 255
};
static const int i_beta_table[52] =
{
     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
     0,  0,  0,  0,  0,  0,  2,  2,  2,  3,
     3,  3,  3,  4,  4,  4,  6,  6,  7,  7,
     8,  8,  9,  9, 10, 10, 11, 11, 12, 12,
    13, 13, 14, 14, 15, 15, 16, 16, 17, 17,
    18, 18
};
static const int i_tc0_table[52][3] =
{
    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 },
    { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 0 }, { 0, 0, 1 },
    { 0, 0, 1 }, { 0, 0, 1 }, { 0, 0, 1 }, { 0, 1, 1 }, { 0, 1, 1 }, { 1, 1, 1 },
    { 1, 1, 1 }, { 1, 1, 1 }, { 1, 1, 1 }, { 1, 1, 2 }, { 1, 1, 2 }, { 1, 1, 2 },
    { 1, 1, 2 }, { 1, 2, 3 }, { 1, 2, 3 }, { 2, 2, 3 }, { 2, 2, 4 }, { 2, 3, 4 },
    { 2, 3, 4 }, { 3, 3, 5 }, { 3, 4, 6 }, { 3, 4, 6 }, { 4, 5, 7 }, { 4, 5, 8 },
    { 4, 6, 9 }, { 5, 7,10 }, { 6, 8,11 }, { 6, 8,13 }, { 7,10,14 }, { 8,11,16 },
    { 9,12,18 }, {10,13,20 }, {11,15,23 }, {13,17,25 }
};

/* From ffmpeg */
static inline int clip_uint8( int a )
{
    if (a&(~255))
        return (-a)>>31;
    else
        return a;
}

static inline void deblock_luma_c( uint8_t *pix, int xstride, int ystride, int alpha, int beta, int8_t *tc0 )
{
    int i, d;
    for( i = 0; i < 4; i++ ) {
        if( tc0[i] < 0 ) {
            pix += 4*ystride;
            continue;
        }
        for( d = 0; d < 4; d++ ) {
            const int p2 = pix[-3*xstride];
            const int p1 = pix[-2*xstride];
            const int p0 = pix[-1*xstride];
            const int q0 = pix[ 0*xstride];
            const int q1 = pix[ 1*xstride];
            const int q2 = pix[ 2*xstride];
   
            if( abs( p0 - q0 ) < alpha &&
                abs( p1 - p0 ) < beta &&
                abs( q1 - q0 ) < beta ) {
   
                int tc = tc0[i];
                int delta;
   
                if( abs( p2 - p0 ) < beta ) {
                    pix[-2*xstride] = p1 + x264_clip3( (( p2 + ((p0 + q0 + 1) >> 1)) >> 1) - p1, -tc0[i], tc0[i] );
                    tc++; 
                }
                if( abs( q2 - q0 ) < beta ) {
                    pix[ 1*xstride] = q1 + x264_clip3( (( q2 + ((p0 + q0 + 1) >> 1)) >> 1) - q1, -tc0[i], tc0[i] );
                    tc++;
                }
    
                delta = x264_clip3( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
                pix[-1*xstride] = clip_uint8( p0 + delta );    /* p0' */
                pix[ 0*xstride] = clip_uint8( q0 - delta );    /* q0' */
            }
            pix += ystride;
        }
    }
}
static void deblock_v_luma_c( uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0 )
{
    deblock_luma_c( pix, stride, 1, alpha, beta, tc0 ); 
}
static void deblock_h_luma_c( uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0 )
{
    deblock_luma_c( pix, 1, stride, alpha, beta, tc0 );
}

static inline void deblock_chroma_c( uint8_t *pix, int xstride, int ystride, int alpha, int beta, int8_t *tc0 )
{
    int i, d;
    for( i = 0; i < 4; i++ ) {
        const int tc = tc0[i];
        if( tc <= 0 ) {
            pix += 2*ystride;
            continue;
        }
        for( d = 0; d < 2; d++ ) {
            const int p1 = pix[-2*xstride];
            const int p0 = pix[-1*xstride];
            const int q0 = pix[ 0*xstride];
            const int q1 = pix[ 1*xstride];

            if( abs( p0 - q0 ) < alpha &&
                abs( p1 - p0 ) < beta &&
                abs( q1 - q0 ) < beta ) {

                int delta = x264_clip3( (((q0 - p0 ) << 2) + (p1 - q1) + 4) >> 3, -tc, tc );
                pix[-1*xstride] = clip_uint8( p0 + delta );    /* p0' */
                pix[ 0*xstride] = clip_uint8( q0 - delta );    /* q0' */
            }
            pix += ystride;
        }
    }
}
static void deblock_v_chroma_c( uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0 )
{   
    deblock_chroma_c( pix, stride, 1, alpha, beta, tc0 );
}
static void deblock_h_chroma_c( uint8_t *pix, int stride, int alpha, int beta, int8_t *tc0 )
{   
    deblock_chroma_c( pix, 1, stride, alpha, beta, tc0 );
}

static inline void deblock_luma_intra_c( uint8_t *pix, int xstride, int ystride, int alpha, int beta )
{
    int d;
    for( d = 0; d < 16; d++ ) {
        const int p2 = pix[-3*xstride];
        const int p1 = pix[-2*xstride];
        const int p0 = pix[-1*xstride];
        const int q0 = pix[ 0*xstride];
        const int q1 = pix[ 1*xstride];
        const int q2 = pix[ 2*xstride];

        if( abs( p0 - q0 ) < alpha &&
            abs( p1 - p0 ) < beta &&
            abs( q1 - q0 ) < beta ) {

            if(abs( p0 - q0 ) < ((alpha >> 2) + 2) ){
                if( abs( p2 - p0 ) < beta)
                {
                    const int p3 = pix[-4*xstride];
                    /* p0', p1', p2' */
                    pix[-1*xstride] = ( p2 + 2*p1 + 2*p0 + 2*q0 + q1 + 4 ) >> 3;
                    pix[-2*xstride] = ( p2 + p1 + p0 + q0 + 2 ) >> 2;
                    pix[-3*xstride] = ( 2*p3 + 3*p2 + p1 + p0 + q0 + 4 ) >> 3;
                } else {
                    /* p0' */
                    pix[-1*xstride] = ( 2*p1 + p0 + q1 + 2 ) >> 2;
                }
                if( abs( q2 - q0 ) < beta)
                {
                    const int q3 = pix[3*xstride];
                    /* q0', q1', q2' */
                    pix[0*xstride] = ( p1 + 2*p0 + 2*q0 + 2*q1 + q2 + 4 ) >> 3;
                    pix[1*xstride] = ( p0 + q0 + q1 + q2 + 2 ) >> 2;
                    pix[2*xstride] = ( 2*q3 + 3*q2 + q1 + q0 + p0 + 4 ) >> 3;
                } else {
                    /* q0' */
                    pix[0*xstride] = ( 2*q1 + q0 + p1 + 2 ) >> 2;
                }
            }else{
                /* p0', q0' */
                pix[-1*xstride] = ( 2*p1 + p0 + q1 + 2 ) >> 2;
                pix[ 0*xstride] = ( 2*q1 + q0 + p1 + 2 ) >> 2;
            }
        }
        pix += ystride;
    }
}
static void deblock_v_luma_intra_c( uint8_t *pix, int stride, int alpha, int beta )
{   
    deblock_luma_intra_c( pix, stride, 1, alpha, beta );
}
static void deblock_h_luma_intra_c( uint8_t *pix, int stride, int alpha, int beta )
{   
    deblock_luma_intra_c( pix, 1, stride, alpha, beta );
}

static inline void deblock_chroma_intra_c( uint8_t *pix, int xstride, int ystride, int alpha, int beta )
{   
    int d; 
    for( d = 0; d < 8; d++ ) {
        const int p1 = pix[-2*xstride];
        const int p0 = pix[-1*xstride];
        const int q0 = pix[ 0*xstride];
        const int q1 = pix[ 1*xstride];

        if( abs( p0 - q0 ) < alpha &&
            abs( p1 - p0 ) < beta &&
            abs( q1 - q0 ) < beta ) {

            pix[-1*xstride] = (2*p1 + p0 + q1 + 2) >> 2;   /* p0' */
            pix[ 0*xstride] = (2*q1 + q0 + p1 + 2) >> 2;   /* q0' */
        }

        pix += ystride;
    }
}
static void deblock_v_chroma_intra_c( uint8_t *pix, int stride, int alpha, int beta )
{   
    deblock_chroma_intra_c( pix, stride, 1, alpha, beta );
}
static void deblock_h_chroma_intra_c( uint8_t *pix, int stride, int alpha, int beta )
{   
    deblock_chroma_intra_c( pix, 1, stride, alpha, beta );
}

static inline void deblock_edge( x264_t *h, uint8_t *pix, int i_stride, int bS[4], int i_qp, int b_chroma,
                                 x264_deblock_inter_t pf_inter, x264_deblock_intra_t pf_intra )
{
    int i;
    const int index_a = x264_clip3( i_qp + h->sh.i_alpha_c0_offset, 0, 51 );
    const int alpha = i_alpha_table[index_a];
    const int beta  = i_beta_table[x264_clip3( i_qp + h->sh.i_beta_offset, 0, 51 )];

    if( bS[0] < 4 ) {
        int8_t tc[4]; 
        for(i=0; i<4; i++)
            tc[i] = (bS[i] ? i_tc0_table[index_a][bS[i] - 1] : -1) + b_chroma;
        pf_inter( pix, i_stride, alpha, beta, tc );
    } else {
        pf_intra( pix, i_stride, alpha, beta );
    }
}

void x264_frame_deblock_row( x264_t *h, int mb_y )
{
    const int s8x8 = 2 * h->mb.i_mb_stride;
    const int s4x4 = 4 * h->mb.i_mb_stride;
    const int b_interlaced = h->sh.b_mbaff;
    const int mvy_limit = 4 >> b_interlaced;
    int mb_x;

    int i_stride2[3] = { h->fdec->i_stride[0] << b_interlaced,
                         h->fdec->i_stride[1] << b_interlaced,
                         h->fdec->i_stride[2] << b_interlaced };

    for( mb_x = 0; mb_x < h->sps->i_mb_width; )
    {
        const int mb_xy  = mb_y * h->mb.i_mb_stride + mb_x;
        const int mb_8x8 = 2 * s8x8 * mb_y + 2 * mb_x;
        const int mb_4x4 = 4 * s4x4 * mb_y + 4 * mb_x;
        const int b_8x8_transform = h->mb.mb_transform_size[mb_xy];
        const int i_edge_end = (h->mb.type[mb_xy] == P_SKIP) ? 1 : 4;
        int i_edge, i_dir;

        int i_pix_y[3] = { 16*mb_y*h->fdec->i_stride[0] + 16*mb_x,
                            8*mb_y*h->fdec->i_stride[1] +  8*mb_x,
                            8*mb_y*h->fdec->i_stride[2] +  8*mb_x };
        if( b_interlaced && (mb_y&1) )
        {
            i_pix_y[0] -= 15*h->fdec->i_stride[0];
            i_pix_y[1] -=  7*h->fdec->i_stride[1];
            i_pix_y[2] -=  7*h->fdec->i_stride[2];
        }

        x264_prefetch_fenc( h, h->fdec, mb_x, mb_y );

        /* cavlc + 8x8 transform stores nnz per 16 coeffs for the purpose of
         * entropy coding, but per 64 coeffs for the purpose of deblocking */
        if( !h->param.b_cabac && b_8x8_transform )
        {
            uint32_t *nnz = (uint32_t*)h->mb.non_zero_count[mb_xy];
            if( nnz[0] ) nnz[0] = 0x01010101;
            if( nnz[1] ) nnz[1] = 0x01010101;
            if( nnz[2] ) nnz[2] = 0x01010101;
            if( nnz[3] ) nnz[3] = 0x01010101;
        }

        /* i_dir == 0 -> vertical edge
         * i_dir == 1 -> horizontal edge */
        for( i_dir = 0; i_dir < 2; i_dir++ )
        {
            int i_start = (i_dir ? (mb_y <= b_interlaced) : (mb_x == 0));
            int i_qp, i_qpn;

            for( i_edge = i_start; i_edge < i_edge_end; i_edge++ )