Пример #1
0
av_cold void ff_ccitt_unpack_init(void)
{
    static VLC_TYPE code_table1[528][2];
    static VLC_TYPE code_table2[648][2];
    int i;
    static int initialized = 0;

    if(initialized)
        return;
    ccitt_vlc[0].table = code_table1;
    ccitt_vlc[0].table_allocated = 528;
    ccitt_vlc[1].table = code_table2;
    ccitt_vlc[1].table_allocated = 648;
    for(i = 0; i < 2; i++){
        init_vlc_sparse(&ccitt_vlc[i], 9, CCITT_SYMS,
                        ccitt_codes_lens[i], 1, 1,
                        ccitt_codes_bits[i], 1, 1,
                        ccitt_syms, 2, 2,
                        INIT_VLC_USE_NEW_STATIC);
    }
    INIT_VLC_STATIC(&ccitt_group3_2d_vlc, 9, 11,
                    ccitt_group3_2d_lens, 1, 1,
                    ccitt_group3_2d_bits, 1, 1, 512);
    initialized = 1;
}
Пример #2
0
static int build_huff_tree(VLC *vlc, Node *nodes, int head, int flags)
{
    int no_zero_count = !(flags & FF_HUFFMAN_FLAG_ZERO_COUNT);
    uint32_t bits[256];
    int16_t lens[256];
    uint8_t xlat[256];
    int pos = 0;

    get_tree_codes(bits, lens, xlat, nodes, head, 0, 0, &pos, no_zero_count);
    return init_vlc_sparse(vlc, 9, pos, lens, 2, 2, bits, 4, 4, xlat, 1, 1, 0);
}
Пример #3
0
static void generate_joint_tables(HYuvContext *s){
    uint16_t symbols[1<<VLC_BITS];
    uint16_t bits[1<<VLC_BITS];
    uint8_t len[1<<VLC_BITS];
    if(s->bitstream_bpp < 24){
        int p, i, y, u;
        for(p=0; p<3; p++){
            for(i=y=0; y<256; y++){
                int len0 = s->len[0][y];
                int limit = VLC_BITS - len0;
                if(limit <= 0 || !len0)
                    continue;
                for(u=0; u<256; u++){
                    int len1 = s->len[p][u];
                    if (len1 > limit || !len1)
                        continue;
                    av_assert0(i < (1 << VLC_BITS));
                    len[i] = len0 + len1;
                    bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];
                    symbols[i] = (y<<8) + u;
                    if(symbols[i] != 0xffff) // reserved to mean "invalid"
                        i++;
                }
            }
            free_vlc(&s->vlc[3+p]);
            init_vlc_sparse(&s->vlc[3+p], VLC_BITS, i, len, 1, 1, bits, 2, 2, symbols, 2, 2, 0);
        }
    }else{
        uint8_t (*map)[4] = (uint8_t(*)[4])s->pix_bgr_map;
        int i, b, g, r, code;
        int p0 = s->decorrelate;
        int p1 = !s->decorrelate;
        // restrict the range to +/-16 becaues that's pretty much guaranteed to
        // cover all the combinations that fit in 11 bits total, and it doesn't
        // matter if we miss a few rare codes.
        for(i=0, g=-16; g<16; g++){
            int len0 = s->len[p0][g&255];
            int limit0 = VLC_BITS - len0;
            if (limit0 < 2 || !len0)
                continue;
            for(b=-16; b<16; b++){
                int len1 = s->len[p1][b&255];
                int limit1 = limit0 - len1;
                if (limit1 < 1 || !len1)
                    continue;
                code = (s->bits[p0][g&255] << len1) + s->bits[p1][b&255];
                for(r=-16; r<16; r++){
                    int len2 = s->len[2][r&255];
                    if (len2 > limit1 || !len2)
                        continue;
                    av_assert0(i < (1 << VLC_BITS));
                    len[i] = len0 + len1 + len2;
                    bits[i] = (code << len2) + s->bits[2][r&255];
                    if(s->decorrelate){
                        map[i][G] = g;
                        map[i][B] = g+b;
                        map[i][R] = g+r;
                    }else{
                        map[i][B] = g;
                        map[i][G] = b;
                        map[i][R] = r;
                    }
                    i++;
                }
            }
        }
        free_vlc(&s->vlc[3]);
        init_vlc(&s->vlc[3], VLC_BITS, i, len, 1, 1, bits, 2, 2, 0);
    }
}
Пример #4
0
static av_cold int mpc8_decode_init(AVCodecContext * avctx)
{
    int i;
    MPCContext *c = avctx->priv_data;
    GetBitContext gb;
    static int vlc_initialized = 0;

    static VLC_TYPE band_table[542][2];
    static VLC_TYPE q1_table[520][2];
    static VLC_TYPE q9up_table[524][2];
    static VLC_TYPE scfi0_table[1 << MPC8_SCFI0_BITS][2];
    static VLC_TYPE scfi1_table[1 << MPC8_SCFI1_BITS][2];
    static VLC_TYPE dscf0_table[560][2];
    static VLC_TYPE dscf1_table[598][2];
    static VLC_TYPE q3_0_table[512][2];
    static VLC_TYPE q3_1_table[516][2];
    static VLC_TYPE codes_table[5708][2];

    if(avctx->extradata_size < 2){
        av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
        return -1;
    }
    memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
    av_lfg_init(&c->rnd, 0xDEADBEEF);
    dsputil_init(&c->dsp, avctx);

    ff_mpc_init();

    init_get_bits(&gb, avctx->extradata, 16);

    skip_bits(&gb, 3);//sample rate
    c->maxbands = get_bits(&gb, 5) + 1;
    skip_bits(&gb, 4);//channels
    c->MSS = get_bits1(&gb);
    c->frames = 1 << (get_bits(&gb, 3) * 2);

    avctx->sample_fmt = SAMPLE_FMT_S16;
    avctx->channel_layout = (avctx->channels==2) ? CH_LAYOUT_STEREO : CH_LAYOUT_MONO;

    if(vlc_initialized) return 0;
    av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");

    band_vlc.table = band_table;
    band_vlc.table_allocated = 542;
    init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE,
             mpc8_bands_bits,  1, 1,
             mpc8_bands_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);

    q1_vlc.table = q1_table;
    q1_vlc.table_allocated = 520;
    init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE,
             mpc8_q1_bits,  1, 1,
             mpc8_q1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
    q9up_vlc.table = q9up_table;
    q9up_vlc.table_allocated = 524;
    init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE,
             mpc8_q9up_bits,  1, 1,
             mpc8_q9up_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);

    scfi_vlc[0].table = scfi0_table;
    scfi_vlc[0].table_allocated = 1 << MPC8_SCFI0_BITS;
    init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE,
             mpc8_scfi0_bits,  1, 1,
             mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
    scfi_vlc[1].table = scfi1_table;
    scfi_vlc[1].table_allocated = 1 << MPC8_SCFI1_BITS;
    init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE,
             mpc8_scfi1_bits,  1, 1,
             mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);

    dscf_vlc[0].table = dscf0_table;
    dscf_vlc[0].table_allocated = 560;
    init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE,
             mpc8_dscf0_bits,  1, 1,
             mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);
    dscf_vlc[1].table = dscf1_table;
    dscf_vlc[1].table_allocated = 598;
    init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE,
             mpc8_dscf1_bits,  1, 1,
             mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC);

    q3_vlc[0].table = q3_0_table;
    q3_vlc[0].table_allocated = 512;
    init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE,
             mpc8_q3_bits,  1, 1,
             mpc8_q3_codes, 1, 1,
             mpc8_q3_syms,  1, 1, INIT_VLC_USE_NEW_STATIC);
    q3_vlc[1].table = q3_1_table;
    q3_vlc[1].table_allocated = 516;
    init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE,
             mpc8_q4_bits,  1, 1,
             mpc8_q4_codes, 1, 1,
             mpc8_q4_syms,  1, 1, INIT_VLC_USE_NEW_STATIC);

    for(i = 0; i < 2; i++){
        res_vlc[i].table = &codes_table[vlc_offsets[0+i]];
        res_vlc[i].table_allocated = vlc_offsets[1+i] - vlc_offsets[0+i];
        init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
                 &mpc8_res_bits[i],  1, 1,
                 &mpc8_res_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

        q2_vlc[i].table = &codes_table[vlc_offsets[2+i]];
        q2_vlc[i].table_allocated = vlc_offsets[3+i] - vlc_offsets[2+i];
        init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
                 &mpc8_q2_bits[i],  1, 1,
                 &mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);

        quant_vlc[0][i].table = &codes_table[vlc_offsets[4+i]];
        quant_vlc[0][i].table_allocated = vlc_offsets[5+i] - vlc_offsets[4+i];
        init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
                 &mpc8_q5_bits[i],  1, 1,
                 &mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
        quant_vlc[1][i].table = &codes_table[vlc_offsets[6+i]];
        quant_vlc[1][i].table_allocated = vlc_offsets[7+i] - vlc_offsets[6+i];
        init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
                 &mpc8_q6_bits[i],  1, 1,
                 &mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
        quant_vlc[2][i].table = &codes_table[vlc_offsets[8+i]];
        quant_vlc[2][i].table_allocated = vlc_offsets[9+i] - vlc_offsets[8+i];
        init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
                 &mpc8_q7_bits[i],  1, 1,
                 &mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
        quant_vlc[3][i].table = &codes_table[vlc_offsets[10+i]];
        quant_vlc[3][i].table_allocated = vlc_offsets[11+i] - vlc_offsets[10+i];
        init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
                 &mpc8_q8_bits[i],  1, 1,
                 &mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC);
    }
    vlc_initialized = 1;
    return 0;
}
Пример #5
0
static av_cold int mpc8_decode_init(AVCodecContext * avctx)
{
    int i;
    MPCContext *c = avctx->priv_data;
    GetBitContext gb;
    static int vlc_initialized = 0;

    if(avctx->extradata_size < 2){
        av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
        return -1;
    }
    memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
    av_init_random(0xDEADBEEF, &c->rnd);
    dsputil_init(&c->dsp, avctx);

    ff_mpc_init();

    init_get_bits(&gb, avctx->extradata, 16);

    skip_bits(&gb, 3);//sample rate
    c->maxbands = get_bits(&gb, 5) + 1;
    skip_bits(&gb, 4);//channels
    c->MSS = get_bits1(&gb);
    c->frames = 1 << (get_bits(&gb, 3) * 2);

    if(vlc_initialized) return 0;
    av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");

    init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE,
             mpc8_bands_bits,  1, 1,
             mpc8_bands_codes, 1, 1, INIT_VLC_USE_STATIC);

    init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE,
             mpc8_q1_bits,  1, 1,
             mpc8_q1_codes, 1, 1, INIT_VLC_USE_STATIC);
    init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE,
             mpc8_q9up_bits,  1, 1,
             mpc8_q9up_codes, 1, 1, INIT_VLC_USE_STATIC);

    init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE,
             mpc8_scfi0_bits,  1, 1,
             mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_STATIC);
    init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE,
             mpc8_scfi1_bits,  1, 1,
             mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_STATIC);

    init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE,
             mpc8_dscf0_bits,  1, 1,
             mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_STATIC);
    init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE,
             mpc8_dscf1_bits,  1, 1,
             mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_STATIC);

    init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE,
             mpc8_q3_bits,  1, 1,
             mpc8_q3_codes, 1, 1,
             mpc8_q3_syms,  1, 1, INIT_VLC_USE_STATIC);
    init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE,
             mpc8_q4_bits,  1, 1,
             mpc8_q4_codes, 1, 1,
             mpc8_q4_syms,  1, 1, INIT_VLC_USE_STATIC);

    for(i = 0; i < 2; i++){
        init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE,
                 &mpc8_res_bits[i],  1, 1,
                 &mpc8_res_codes[i], 1, 1, INIT_VLC_USE_STATIC);

        init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE,
                 &mpc8_q2_bits[i],  1, 1,
                 &mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_STATIC);

        init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE,
                 &mpc8_q5_bits[i],  1, 1,
                 &mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_STATIC);
        init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE,
                 &mpc8_q6_bits[i],  1, 1,
                 &mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_STATIC);
        init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE,
                 &mpc8_q7_bits[i],  1, 1,
                 &mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_STATIC);
        init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE,
                 &mpc8_q8_bits[i],  1, 1,
                 &mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_STATIC);
    }
    vlc_initialized = 1;
    return 0;
}