C++ (Cpp) av_clip_intp2 Examples

Example #1

File: motionpixels.c Project: TaoheGit/hmi_sdl_android

static void mp_decode_frame_helper(MotionPixelsContext *mp, GetBitContext *gb)
{
    YuvPixel p;
    int y, y0;

    av_assert1(mp->changes_map[0]);

    for (y = 0; y < mp->avctx->height; ++y) {
        if (mp->changes_map[y * mp->avctx->width] != 0) {
            memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
            p = mp_get_yuv_from_rgb(mp, 0, y);
        } else {
            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
            p.y = av_clip_uintp2(p.y, 5);
            if ((y & 3) == 0) {
                p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
                p.v = av_clip_intp2(p.v, 5);
                p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
                p.u = av_clip_intp2(p.u, 5);
            }
            mp->vpt[y] = p;
            mp_set_rgb_from_yuv(mp, 0, y, &p);
        }
    }
    for (y0 = 0; y0 < 2; ++y0)
        for (y = y0; y < mp->avctx->height; y += 2)
            mp_decode_line(mp, gb, y);
}

Example #2

File: adxenc.c Project: Homecoktail/ppsspp-ffmpeg

static void adx_encode(ADXContext *c, uint8_t *adx, const int16_t *wav,
                       ADXChannelState *prev, int channels)
{
    PutBitContext pb;
    int scale;
    int i, j;
    int s0, s1, s2, d;
    int max = 0;
    int min = 0;

    s1 = prev->s1;
    s2 = prev->s2;
    for (i = 0, j = 0; j < 32; i += channels, j++) {
        s0 = wav[i];
        d = ((s0 << COEFF_BITS) - c->coeff[0] * s1 - c->coeff[1] * s2) >> COEFF_BITS;
        if (max < d)
            max = d;
        if (min > d)
            min = d;
        s2 = s1;
        s1 = s0;
    }

    if (max == 0 && min == 0) {
        prev->s1 = s1;
        prev->s2 = s2;
        memset(adx, 0, BLOCK_SIZE);
        return;
    }

    if (max / 7 > -min / 8)
        scale = max / 7;
    else
        scale = -min / 8;

    if (scale == 0)
        scale = 1;

    AV_WB16(adx, scale);

    init_put_bits(&pb, adx + 2, 16);

    s1 = prev->s1;
    s2 = prev->s2;
    for (i = 0, j = 0; j < 32; i += channels, j++) {
        d = ((wav[i] << COEFF_BITS) - c->coeff[0] * s1 - c->coeff[1] * s2) >> COEFF_BITS;

        d = av_clip_intp2(ROUNDED_DIV(d, scale), 3);

        put_sbits(&pb, 4, d);

        s0 = ((d << COEFF_BITS) * scale + c->coeff[0] * s1 + c->coeff[1] * s2) >> COEFF_BITS;
        s2 = s1;
        s1 = s0;
    }
    prev->s1 = s1;
    prev->s2 = s2;

    flush_put_bits(&pb);
}

Example #3

File: motionpixels.c Project: TaoheGit/hmi_sdl_android

static void mp_decode_line(MotionPixelsContext *mp, GetBitContext *gb, int y)
{
    YuvPixel p;
    const int y0 = y * mp->avctx->width;
    int w, i, x = 0;

    p = mp->vpt[y];
    if (mp->changes_map[y0 + x] == 0) {
        memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
        ++x;
    }
    while (x < mp->avctx->width) {
        w = mp->changes_map[y0 + x];
        if (w != 0) {
            if ((y & 3) == 0) {
                if (mp->changes_map[y0 + x + mp->avctx->width] < w ||
                    mp->changes_map[y0 + x + mp->avctx->width * 2] < w ||
                    mp->changes_map[y0 + x + mp->avctx->width * 3] < w) {
                    for (i = (x + 3) & ~3; i < x + w; i += 4) {
                        mp->hpt[((y / 4) * mp->avctx->width + i) / 4] = mp_get_yuv_from_rgb(mp, i, y);
                    }
                }
            }
            x += w;
            memset(mp->gradient_scale, 1, sizeof(mp->gradient_scale));
            p = mp_get_yuv_from_rgb(mp, x - 1, y);
        } else {
            p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
            p.y = av_clip_uintp2(p.y, 5);
            if ((x & 3) == 0) {
                if ((y & 3) == 0) {
                    p.v += mp_gradient(mp, 1, mp_get_vlc(mp, gb));
                    p.v = av_clip_intp2(p.v, 5);
                    p.u += mp_gradient(mp, 2, mp_get_vlc(mp, gb));
                    p.u = av_clip_intp2(p.u, 5);
                    mp->hpt[((y / 4) * mp->avctx->width + x) / 4] = p;
                } else {
                    p.v = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].v;
                    p.u = mp->hpt[((y / 4) * mp->avctx->width + x) / 4].u;
                }
            }
            mp_set_rgb_from_yuv(mp, x, y, &p);
            ++x;
        }
    }
}