Function iv_Decode_Chunk

libavcodec/indeo3.c:203–958

    lp2 = 4;

static void iv_Decode_Chunk(Indeo3DecodeContext *s,
        uint8_t *cur, uint8_t *ref, int width, int height,
        const uint8_t *buf1, long cb_offset, const uint8_t *hdr,
        const uint8_t *buf2, int min_width_160)
{
    uint8_t bit_buf;
    unsigned long bit_pos, lv, lv1, lv2;
    long *width_tbl, width_tbl_arr[10];
    const signed char *ref_vectors;
    uint8_t *cur_frm_pos, *ref_frm_pos, *cp, *cp2;
    uint32_t *cur_lp, *ref_lp;
    const uint32_t *correction_lp[2], *correctionloworder_lp[2], *correctionhighorder_lp[2];
    uint8_t *correction_type_sp[2];
    struct ustr strip_tbl[20], *strip;
    int i, j, k, lp1, lp2, flag1, cmd, blks_width, blks_height, region_160_width,
        rle_v1, rle_v2, rle_v3;
    unsigned short res;

    bit_buf = 0;
    ref_vectors = NULL;

    width_tbl = width_tbl_arr + 1;
    i = (width < 0 ? width + 3 : width)/4;
    for(j = -1; j < 8; j++)
        width_tbl[j] = i * j;

    strip = strip_tbl;

    for(region_160_width = 0; region_160_width < (width - min_width_160); region_160_width += min_width_160);

    strip->ypos = strip->xpos = 0;
    for(strip->width = min_width_160; width > strip->width; strip->width *= 2);
    strip->height = height;
    strip->split_direction = 0;
    strip->split_flag = 0;
    strip->usl7 = 0;

    bit_pos = 0;

    rle_v1 = rle_v2 = rle_v3 = 0;

    while(strip >= strip_tbl) {
        if(bit_pos <= 0) {
            bit_pos = 8;
            bit_buf = *buf1++;
        }

        bit_pos -= 2;
        cmd = (bit_buf >> bit_pos) & 0x03;

        if(cmd == 0) {
            strip++;
            if(strip >= strip_tbl + FF_ARRAY_ELEMS(strip_tbl)) {
                av_log(s->avctx, AV_LOG_WARNING, "out of range strip\n");
                break;
            }
            memcpy(strip, strip-1, sizeof(*strip));
            strip->split_flag = 1;