pixel.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

    perm3vA = vec_lvsl(0, pix3);

    perm0vB = vec_lvsl(0, pix0 + i_stride);
    perm1vB = vec_lvsl(0, pix1 + i_stride);
    perm2vB = vec_lvsl(0, pix2 + i_stride);
    perm3vB = vec_lvsl(0, pix3 + i_stride);

    for (y = 0; y < 8; y++)
    {
        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vA);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vA);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);
        temp_hv = vec_ld(16, pix2);
        pix2v = vec_perm(temp_lv, temp_hv, perm2vA);
        pix2 += i_stride;

        temp_lv = vec_ld(0, pix3);
        temp_hv = vec_ld(16, pix3);
        pix3v = vec_perm(temp_lv, temp_hv, perm3vA);
        pix3 += i_stride;

        sum0v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix0v ), vec_min( fencv, pix0v ) ), (vec_u32_t) sum0v );

        sum1v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix1v ), vec_min( fencv, pix1v ) ), (vec_u32_t) sum1v );

        sum2v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix2v ), vec_min( fencv, pix2v ) ), (vec_u32_t) sum2v );

        sum3v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix3v ), vec_min( fencv, pix3v ) ), (vec_u32_t) sum3v );

        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vB);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vB);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);
        temp_hv = vec_ld(16, pix2);
        pix2v = vec_perm(temp_lv, temp_hv, perm2vB);
        pix2 += i_stride;

        temp_lv = vec_ld(0, pix3);
        temp_hv = vec_ld(16, pix3);
        pix3v = vec_perm(temp_lv, temp_hv, perm3vB);
        pix3 += i_stride;

        sum0v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix0v ), vec_min( fencv, pix0v ) ), (vec_u32_t) sum0v );

        sum1v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix1v ), vec_min( fencv, pix1v ) ), (vec_u32_t) sum1v );

        sum2v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix2v ), vec_min( fencv, pix2v ) ), (vec_u32_t) sum2v );

        sum3v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix3v ), vec_min( fencv, pix3v ) ), (vec_u32_t) sum3v );
    }

    sum0v = vec_sum2s( sum0v, zero_s32v );
    sum1v = vec_sum2s( sum1v, zero_s32v );
    sum2v = vec_sum2s( sum2v, zero_s32v );
    sum3v = vec_sum2s( sum3v, zero_s32v );

    sum0v = vec_splat( sum0v, 1 );
    sum1v = vec_splat( sum1v, 1 );
    sum2v = vec_splat( sum2v, 1 );
    sum3v = vec_splat( sum3v, 1 );

    vec_ste( sum0v, 0, &sum0);
    vec_ste( sum1v, 0, &sum1);
    vec_ste( sum2v, 0, &sum2);
    vec_ste( sum3v, 0, &sum3);

    scores[0] = sum0;
    scores[1] = sum1;
    scores[2] = sum2;
    scores[3] = sum3;
}

static void pixel_sad_x3_8x16_altivec( uint8_t *fenc, uint8_t *pix0,
                                       uint8_t *pix1, uint8_t *pix2,
                                       int i_stride, int scores[3] )
{
    DECLARE_ALIGNED_16( int sum0 );
    DECLARE_ALIGNED_16( int sum1 );
    DECLARE_ALIGNED_16( int sum2 );
    int y;

    LOAD_ZERO;
    vec_u8_t temp_lv, temp_hv;
    vec_u8_t fencv, pix0v, pix1v, pix2v;
    vec_u8_t perm0vA, perm1vA, perm2vA, perm0vB, perm1vB, perm2vB,permEncv;

    vec_s32_t sum0v, sum1v, sum2v;

    sum0v = vec_splat_s32(0);
    sum1v = vec_splat_s32(0);
    sum2v = vec_splat_s32(0);

    permEncv = vec_lvsl(0, fenc);
    perm0vA = vec_lvsl(0, pix0);
    perm1vA = vec_lvsl(0, pix1);
    perm2vA = vec_lvsl(0, pix2);

    perm0vB = vec_lvsl(0, pix0 + i_stride);
    perm1vB = vec_lvsl(0, pix1 + i_stride);
    perm2vB = vec_lvsl(0, pix2 + i_stride);

    for (y = 0; y < 8; y++)
    {
        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vA);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vA);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);
        temp_hv = vec_ld(16, pix2);
        pix2v = vec_perm(temp_lv, temp_hv, perm2vA);
        pix2 += i_stride;

        sum0v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix0v ), vec_min( fencv, pix0v ) ), (vec_u32_t) sum0v );

        sum1v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix1v ), vec_min( fencv, pix1v ) ), (vec_u32_t) sum1v );

        sum2v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix2v ), vec_min( fencv, pix2v ) ), (vec_u32_t) sum2v );

        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vB);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vB);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);
        temp_hv = vec_ld(16, pix2);
        pix2v = vec_perm(temp_lv, temp_hv, perm2vB);
        pix2 += i_stride;

        sum0v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix0v ), vec_min( fencv, pix0v ) ), (vec_u32_t) sum0v );

        sum1v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix1v ), vec_min( fencv, pix1v ) ), (vec_u32_t) sum1v );

        sum2v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix2v ), vec_min( fencv, pix2v ) ), (vec_u32_t) sum2v );
    }

    sum0v = vec_sum2s( sum0v, zero_s32v );
    sum1v = vec_sum2s( sum1v, zero_s32v );
    sum2v = vec_sum2s( sum2v, zero_s32v );

    sum0v = vec_splat( sum0v, 1 );
    sum1v = vec_splat( sum1v, 1 );
    sum2v = vec_splat( sum2v, 1 );

    vec_ste( sum0v, 0, &sum0);
    vec_ste( sum1v, 0, &sum1);
    vec_ste( sum2v, 0, &sum2);

    scores[0] = sum0;
    scores[1] = sum1;
    scores[2] = sum2;
}

static void pixel_sad_x4_8x8_altivec( uint8_t *fenc,
                                      uint8_t *pix0, uint8_t *pix1,
                                      uint8_t *pix2, uint8_t *pix3,
                                      int i_stride, int scores[4] )
{
    DECLARE_ALIGNED_16( int sum0 );
    DECLARE_ALIGNED_16( int sum1 );
    DECLARE_ALIGNED_16( int sum2 );
    DECLARE_ALIGNED_16( int sum3 );
    int y;

    LOAD_ZERO;
    vec_u8_t temp_lv, temp_hv;
    vec_u8_t fencv, pix0v, pix1v, pix2v, pix3v;
    vec_u8_t perm0vA, perm1vA, perm2vA, perm3vA, perm0vB, perm1vB, perm2vB, perm3vB, permEncv;

    vec_s32_t sum0v, sum1v, sum2v, sum3v;

    sum0v = vec_splat_s32(0);
    sum1v = vec_splat_s32(0);
    sum2v = vec_splat_s32(0);
    sum3v = vec_splat_s32(0);

    permEncv = vec_lvsl(0, fenc);
    perm0vA = vec_lvsl(0, pix0);
    perm1vA = vec_lvsl(0, pix1);
    perm2vA = vec_lvsl(0, pix2);
    perm3vA = vec_lvsl(0, pix3);

    perm0vB = vec_lvsl(0, pix0 + i_stride);
    perm1vB = vec_lvsl(0, pix1 + i_stride);
    perm2vB = vec_lvsl(0, pix2 + i_stride);
    perm3vB = vec_lvsl(0, pix3 + i_stride);

    for (y = 0; y < 4; y++)
    {
        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vA);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vA);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);
        temp_hv = vec_ld(16, pix2);
        pix2v = vec_perm(temp_lv, temp_hv, perm2vA);
        pix2 += i_stride;

        temp_lv = vec_ld(0, pix3);
        temp_hv = vec_ld(16, pix3);
        pix3v = vec_perm(temp_lv, temp_hv, perm3vA);
        pix3 += i_stride;

        sum0v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix0v ), vec_min( fencv, pix0v ) ), (vec_u32_t) sum0v );

        sum1v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix1v ), vec_min( fencv, pix1v ) ), (vec_u32_t) sum1v );

        sum2v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix2v ), vec_min( fencv, pix2v ) ), (vec_u32_t) sum2v );

        sum3v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix3v ), vec_min( fencv, pix3v ) ), (vec_u32_t) sum3v );

        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vB);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vB);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);
        temp_hv = vec_ld(16, pix2);
        pix2v = vec_perm(temp_lv, temp_hv, perm2vB);
        pix2 += i_stride;

        temp_lv = vec_ld(0, pix3);
        temp_hv = vec_ld(16, pix3);
        pix3v = vec_perm(temp_lv, temp_hv, perm3vB);
        pix3 += i_stride;

        sum0v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix0v ), vec_min( fencv, pix0v ) ), (vec_u32_t) sum0v );

        sum1v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix1v ), vec_min( fencv, pix1v ) ), (vec_u32_t) sum1v );

        sum2v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix2v ), vec_min( fencv, pix2v ) ), (vec_u32_t) sum2v );

        sum3v = (vec_s32_t) vec_sum4s( vec_sub( vec_max( fencv, pix3v ), vec_min( fencv, pix3v ) ), (vec_u32_t) sum3v );
    }

    sum0v = vec_sum2s( sum0v, zero_s32v );
    sum1v = vec_sum2s( sum1v, zero_s32v );
    sum2v = vec_sum2s( sum2v, zero_s32v );
    sum3v = vec_sum2s( sum3v, zero_s32v );

    sum0v = vec_splat( sum0v, 1 );
    sum1v = vec_splat( sum1v, 1 );
    sum2v = vec_splat( sum2v, 1 );
    sum3v = vec_splat( sum3v, 1 );

    vec_ste( sum0v, 0, &sum0);
    vec_ste( sum1v, 0, &sum1);
    vec_ste( sum2v, 0, &sum2);
    vec_ste( sum3v, 0, &sum3);

    scores[0] = sum0;
    scores[1] = sum1;
    scores[2] = sum2;
    scores[3] = sum3;
}

static void pixel_sad_x3_8x8_altivec( uint8_t *fenc, uint8_t *pix0,
                                      uint8_t *pix1, uint8_t *pix2,
                                      int i_stride, int scores[3] )
{
    DECLARE_ALIGNED_16( int sum0 );
    DECLARE_ALIGNED_16( int sum1 );
    DECLARE_ALIGNED_16( int sum2 );
    int y;

    LOAD_ZERO;
    vec_u8_t temp_lv, temp_hv;
    vec_u8_t fencv, pix0v, pix1v, pix2v;
    vec_u8_t perm0vA, perm1vA, perm2vA, perm0vB, perm1vB, perm2vB,  permEncv;

    vec_s32_t sum0v, sum1v, sum2v;

    sum0v = vec_splat_s32(0);
    sum1v = vec_splat_s32(0);
    sum2v = vec_splat_s32(0);

    permEncv = vec_lvsl(0, fenc);
    perm0vA = vec_lvsl(0, pix0);
    perm1vA = vec_lvsl(0, pix1);
    perm2vA = vec_lvsl(0, pix2);

    perm0vB = vec_lvsl(0, pix0 + i_stride);
    perm1vB = vec_lvsl(0, pix1 + i_stride);
    perm2vB = vec_lvsl(0, pix2 + i_stride);

    for (y = 0; y < 4; y++)
    {
        temp_lv = vec_ld(0, pix0);
        temp_hv = vec_ld(16, pix0);
        pix0v = vec_perm(temp_lv, temp_hv, perm0vA);
        pix0 += i_stride;

        temp_lv = vec_ld(0, pix1);
        temp_hv = vec_ld(16, pix1);
        pix1v = vec_perm(temp_lv, temp_hv, perm1vA);
        pix1 += i_stride;

        temp_lv = vec_ld(0, fenc);
        fencv = vec_perm(temp_lv, temp_hv, permEncv);
        fenc += FENC_STRIDE;

        temp_lv = vec_ld(0, pix2);