C++ (Cpp) ff_huffyuv_generate_bits_table示例

示例#1

文件： huffyuvdec.c 项目： lihp1603/ffmpeg

static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
{
    GetBitContext gb;
    int i, ret;
    int count = 3;

    if ((ret = init_get_bits(&gb, src, length * 8)) < 0)
        return ret;

    if (s->version > 2)
        count = 1 + s->alpha + 2*s->chroma;

    for (i = 0; i < count; i++) {
        if ((ret = read_len_table(s->len[i], &gb, s->vlc_n)) < 0)
            return ret;
        if ((ret = ff_huffyuv_generate_bits_table(s->bits[i], s->len[i], s->vlc_n)) < 0)
            return ret;
        ff_free_vlc(&s->vlc[i]);
        if ((ret = init_vlc(&s->vlc[i], VLC_BITS, s->vlc_n, s->len[i], 1, 1,
                           s->bits[i], 4, 4, 0)) < 0)
            return ret;
    }

    if ((ret = generate_joint_tables(s)) < 0)
        return ret;

    return (get_bits_count(&gb) + 7) / 8;
}

示例#2

文件： huffyuvdec.c 项目： MaVuong/FFmpeg-Vitamio

static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length)
{
    GetBitContext gb;
    int i;
    int ret;

    init_get_bits(&gb, src, length * 8);

    for (i = 0; i < 3; i++) {
        if (read_len_table(s->len[i], &gb) < 0)
            return -1;
        if (ff_huffyuv_generate_bits_table(s->bits[i], s->len[i]) < 0) {
            return -1;
        }
        ff_free_vlc(&s->vlc[i]);
        if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
                           s->bits[i], 4, 4, 0)) < 0)
            return ret;
    }

    if ((ret = generate_joint_tables(s)) < 0)
        return ret;

    return (get_bits_count(&gb) + 7) / 8;
}