Exemplos de IDCT8_1D_ALTIVEC em C++ (Cpp)

Exemplo n.º 1

Arquivo: h264_altivec.c Projeto: 248668342/ffmpeg-windows

static void ff_h264_idct8_add_altivec( uint8_t *dst, DCTELEM *dct, int stride )
{
    vec_s16 s0, s1, s2, s3, s4, s5, s6, s7;
    vec_s16 d0, d1, d2, d3, d4, d5, d6, d7;
    vec_s16 idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7;

    vec_u8 perm_ldv = vec_lvsl(0, dst);
    vec_u8 perm_stv = vec_lvsr(8, dst);

    const vec_u16 onev = vec_splat_u16(1);
    const vec_u16 twov = vec_splat_u16(2);
    const vec_u16 sixv = vec_splat_u16(6);

    const vec_u8 sel = (vec_u8)
    {
        0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, -1, -1, -1, -1, -1
    };
    LOAD_ZERO;

    dct[0] += 32; // rounding for the >>6 at the end

    s0 = vec_ld(0x00, (int16_t *)dct);
    s1 = vec_ld(0x10, (int16_t *)dct);
    s2 = vec_ld(0x20, (int16_t *)dct);
    s3 = vec_ld(0x30, (int16_t *)dct);
    s4 = vec_ld(0x40, (int16_t *)dct);
    s5 = vec_ld(0x50, (int16_t *)dct);
    s6 = vec_ld(0x60, (int16_t *)dct);
    s7 = vec_ld(0x70, (int16_t *)dct);

    IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7,
                     d0, d1, d2, d3, d4, d5, d6, d7);

    TRANSPOSE8( d0,  d1,  d2,  d3,  d4,  d5,  d6, d7 );

    IDCT8_1D_ALTIVEC(d0,  d1,  d2,  d3,  d4,  d5,  d6, d7,
                     idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7);

    ALTIVEC_STORE_SUM_CLIP(&dst[0*stride], idct0, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[1*stride], idct1, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[2*stride], idct2, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[3*stride], idct3, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[4*stride], idct4, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[5*stride], idct5, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[6*stride], idct6, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[7*stride], idct7, perm_ldv, perm_stv, sel);
}

Exemplo n.º 2

Arquivo: dct.c Projeto: 0x0B501E7E/x264

void x264_add8x8_idct8_altivec( uint8_t *dst, int16_t dct[64] )
{
    vec_u16_t onev = vec_splat_u16(1);
    vec_u16_t twov = vec_splat_u16(2);

    dct[0] += 32; // rounding for the >>6 at the end

    vec_s16_t s0, s1, s2, s3, s4, s5, s6, s7;

    s0 = vec_ld(0x00, dct);
    s1 = vec_ld(0x10, dct);
    s2 = vec_ld(0x20, dct);
    s3 = vec_ld(0x30, dct);
    s4 = vec_ld(0x40, dct);
    s5 = vec_ld(0x50, dct);
    s6 = vec_ld(0x60, dct);
    s7 = vec_ld(0x70, dct);

    vec_s16_t d0, d1, d2, d3, d4, d5, d6, d7;
    IDCT8_1D_ALTIVEC(s0, s1, s2, s3, s4, s5, s6, s7,  d0, d1, d2, d3, d4, d5, d6, d7);

    vec_s16_t tr0, tr1, tr2, tr3, tr4, tr5, tr6, tr7;

    VEC_TRANSPOSE_8( d0,  d1,  d2,  d3,  d4,  d5,  d6, d7,
                    tr0, tr1, tr2, tr3, tr4, tr5, tr6, tr7);

    vec_s16_t idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7;
    IDCT8_1D_ALTIVEC(tr0,     tr1,   tr2,   tr3,   tr4,   tr5,   tr6,   tr7,
                     idct0, idct1, idct2, idct3, idct4, idct5, idct6, idct7);

    vec_u8_t perm_ldv = vec_lvsl(0, dst);
    vec_u8_t perm_stv = vec_lvsr(8, dst);
    vec_u16_t sixv = vec_splat_u16(6);
    const vec_u8_t sel = (vec_u8_t) CV(0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,-1,-1,-1);
    LOAD_ZERO;

    ALTIVEC_STORE_SUM_CLIP(&dst[0*FDEC_STRIDE], idct0, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[1*FDEC_STRIDE], idct1, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[2*FDEC_STRIDE], idct2, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[3*FDEC_STRIDE], idct3, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[4*FDEC_STRIDE], idct4, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[5*FDEC_STRIDE], idct5, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[6*FDEC_STRIDE], idct6, perm_ldv, perm_stv, sel);
    ALTIVEC_STORE_SUM_CLIP(&dst[7*FDEC_STRIDE], idct7, perm_ldv, perm_stv, sel);
}