Пример #1
0
Файл: vc1enc.c Проект: Kjir/amsn
/**
 * Intra picture MB layer bitstream encoder
 * @param s Mpeg encoder context
 * @param block macroblock to encode
 */
void vc1_intra_picture_encode_mb(MpegEncContext * s, DCTELEM block[6][64])
{
    int cbp, coded_cbp, i;
    uint8_t *coded_block;

    /* compute cbp */
    cbp = 0;
    coded_cbp = 0;
    for (i = 0; i < 6; i++) {
        int val, pred;
        val = (s->block_last_index[i] >= 1);
        cbp |= val << (5 - i);
        if (i < 4) {
            /* predict value for close blocks only for luma */
            pred = vc1_coded_block_pred(s, i, &coded_block);
            *coded_block = val;
            val = val ^ pred;
        }
        coded_cbp |= val << (5 - i);
    }
    put_bits(&s->pb,ff_msmp4_mb_i_table[coded_cbp][1],
             ff_msmp4_mb_i_table[coded_cbp][0]);//CBPCY

    //predict dc_val and dc_direction for each block

    //brute force test to switch ACPRED on/off
    put_bits(&s->pb,1,0);//ACPRED

    for (i = 0; i < 6; i++)
        ff_msmpeg4_encode_block(s, block[i], i);

    s->i_tex_bits += get_bits_diff(s);
    s->i_count++;
}
Пример #2
0
/* Nearly identical to wmv1 but that is just because we do not use the
 * useless M$ crap features. It is duplicated here in case someone wants
 * to add support for these crap features. */
void ff_wmv2_encode_mb(MpegEncContext *s, int16_t block[6][64],
                       int motion_x, int motion_y)
{
    Wmv2Context *const w = (Wmv2Context *) s;
    int cbp, coded_cbp, i;
    int pred_x, pred_y;
    uint8_t *coded_block;

    ff_msmpeg4_handle_slices(s);

    if (!s->mb_intra) {
        /* compute cbp */
        cbp = 0;
        for (i = 0; i < 6; i++)
            if (s->block_last_index[i] >= 0)
                cbp |= 1 << (5 - i);

        put_bits(&s->pb,
                 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
                 ff_wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);

        s->misc_bits += get_bits_diff(s);
        /* motion vector */
        ff_h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
        ff_msmpeg4_encode_motion(s, motion_x - pred_x,
                                 motion_y - pred_y);
        s->mv_bits += get_bits_diff(s);
    } else {
        /* compute cbp */
        cbp       = 0;
        coded_cbp = 0;
        for (i = 0; i < 6; i++) {
            int val, pred;
            val  = (s->block_last_index[i] >= 1);
            cbp |= val << (5 - i);
            if (i < 4) {
                /* predict value for close blocks only for luma */
                pred         = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
                *coded_block = val;
                val          = val ^ pred;
            }
            coded_cbp |= val << (5 - i);
        }

        if (s->pict_type == AV_PICTURE_TYPE_I)
            put_bits(&s->pb,
                     ff_msmp4_mb_i_table[coded_cbp][1],
                     ff_msmp4_mb_i_table[coded_cbp][0]);
        else
            put_bits(&s->pb,
                     ff_wmv2_inter_table[w->cbp_table_index][cbp][1],
                     ff_wmv2_inter_table[w->cbp_table_index][cbp][0]);
        put_bits(&s->pb, 1, 0);         /* no AC prediction yet */
        if (s->inter_intra_pred) {
            s->h263_aic_dir = 0;
            put_bits(&s->pb,
                     ff_table_inter_intra[s->h263_aic_dir][1],
                     ff_table_inter_intra[s->h263_aic_dir][0]);
        }
        s->misc_bits += get_bits_diff(s);
    }

    for (i = 0; i < 6; i++)
        ff_msmpeg4_encode_block(s, block[i], i);
    if (s->mb_intra)
        s->i_tex_bits += get_bits_diff(s);
    else
        s->p_tex_bits += get_bits_diff(s);
}
Пример #3
0
/* Nearly identical to wmv1 but that is just because we do not use the
 * useless M$ crap features. It is duplicated here in case someone wants
 * to add support for these crap features. */
void ff_wmv2_encode_mb(MpegEncContext * s,
                       DCTELEM block[6][64],
                       int motion_x, int motion_y)
{
    Wmv2Context * const w= (Wmv2Context*)s;
    int cbp, coded_cbp, i;
    int pred_x, pred_y;
    uint8_t *coded_block;

    ff_msmpeg4_handle_slices(s);

    if (!s->mb_intra) {
        /* compute cbp */
        cbp = 0;
        for (i = 0; i < 6; i++) {
            if (s->block_last_index[i] >= 0)
                cbp |= 1 << (5 - i);
        }

        put_bits(&s->pb,
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][1],
                 wmv2_inter_table[w->cbp_table_index][cbp + 64][0]);

        /* motion vector */
        h263_pred_motion(s, 0, 0, &pred_x, &pred_y);
        ff_msmpeg4_encode_motion(s, motion_x - pred_x,
                              motion_y - pred_y);
    } else {
        /* compute cbp */
        cbp = 0;
        coded_cbp = 0;
        for (i = 0; i < 6; i++) {
            int val, pred;
            val = (s->block_last_index[i] >= 1);
            cbp |= val << (5 - i);
            if (i < 4) {
                /* predict value for close blocks only for luma */
                pred = ff_msmpeg4_coded_block_pred(s, i, &coded_block);
                *coded_block = val;
                val = val ^ pred;
            }
            coded_cbp |= val << (5 - i);
        }
#if 0
        if (coded_cbp)
            printf("cbp=%x %x\n", cbp, coded_cbp);
#endif

        if (s->pict_type == FF_I_TYPE) {
            put_bits(&s->pb,
                     ff_msmp4_mb_i_table[coded_cbp][1], ff_msmp4_mb_i_table[coded_cbp][0]);
        } else {
            put_bits(&s->pb,
                     wmv2_inter_table[w->cbp_table_index][cbp][1],
                     wmv2_inter_table[w->cbp_table_index][cbp][0]);
        }
        put_bits(&s->pb, 1, 0);         /* no AC prediction yet */
        if(s->inter_intra_pred){
            s->h263_aic_dir=0;
            put_bits(&s->pb, table_inter_intra[s->h263_aic_dir][1], table_inter_intra[s->h263_aic_dir][0]);
        }
    }

    for (i = 0; i < 6; i++) {
        ff_msmpeg4_encode_block(s, block[i], i);
    }
}