static int encode_block(WMACodecContext *s, float (*src_coefs)[BLOCK_MAX_SIZE], int total_gain){

    int v, bsize, ch, coef_nb_bits, parse_exponents;

    float mdct_norm;

    int nb_coefs[MAX_CHANNELS];

    static const int fixed_exp[25]={20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20};



    

    if (s->use_variable_block_len) {

        assert(0); 

    }else{

        

        s->next_block_len_bits = s->frame_len_bits;

        s->prev_block_len_bits = s->frame_len_bits;

        s->block_len_bits = s->frame_len_bits;

    }



    s->block_len = 1 << s->block_len_bits;



    bsize = s->frame_len_bits - s->block_len_bits;



    

    v = s->coefs_end[bsize] - s->coefs_start;

    for(ch = 0; ch < s->nb_channels; ch++)

        nb_coefs[ch] = v;

    {

        int n4 = s->block_len / 2;

        mdct_norm = 1.0 / (float)n4;

        if (s->version == 1) {

            mdct_norm *= sqrt(n4);

        }

    }



    if (s->nb_channels == 2) {

        put_bits(&s->pb, 1, !!s->ms_stereo);

    }



    for(ch = 0; ch < s->nb_channels; ch++) {

        s->channel_coded[ch] = 1; 

        if (s->channel_coded[ch]) {

            init_exp(s, ch, fixed_exp);

        }

    }



    for(ch = 0; ch < s->nb_channels; ch++) {

        if (s->channel_coded[ch]) {

            WMACoef *coefs1;

            float *coefs, *exponents, mult;

            int i, n;



            coefs1 = s->coefs1[ch];

            exponents = s->exponents[ch];

            mult = pow(10, total_gain * 0.05) / s->max_exponent[ch];

            mult *= mdct_norm;

            coefs = src_coefs[ch];

            if (s->use_noise_coding && 0) {

                assert(0); 

            } else {

                coefs += s->coefs_start;

                n = nb_coefs[ch];

                for(i = 0;i < n; i++){

                    double t= *coefs++ / (exponents[i] * mult);

                    if(t<-32768 || t>32767)

                        return -1;



                    coefs1[i] = lrint(t);

                }

            }

        }

    }



    v = 0;

    for(ch = 0; ch < s->nb_channels; ch++) {

        int a = s->channel_coded[ch];

        put_bits(&s->pb, 1, a);

        v |= a;

    }



    if (!v)

        return 1;



    for(v= total_gain-1; v>=127; v-= 127)

        put_bits(&s->pb, 7, 127);

    put_bits(&s->pb, 7, v);



    coef_nb_bits= ff_wma_total_gain_to_bits(total_gain);



    if (s->use_noise_coding) {

        for(ch = 0; ch < s->nb_channels; ch++) {

            if (s->channel_coded[ch]) {

                int i, n;

                n = s->exponent_high_sizes[bsize];

                for(i=0;i<n;i++) {

                    put_bits(&s->pb, 1, s->high_band_coded[ch][i]= 0);

                    if (0)

                        nb_coefs[ch] -= s->exponent_high_bands[bsize][i];

                }

            }

        }

    }



    parse_exponents = 1;

    if (s->block_len_bits != s->frame_len_bits) {

        put_bits(&s->pb, 1, parse_exponents);

    }



    if (parse_exponents) {

        for(ch = 0; ch < s->nb_channels; ch++) {

            if (s->channel_coded[ch]) {

                if (s->use_exp_vlc) {

                    encode_exp_vlc(s, ch, fixed_exp);

                } else {

                    assert(0); 



                }

            }

        }

    } else {

        assert(0); 

    }



    for(ch = 0; ch < s->nb_channels; ch++) {

        if (s->channel_coded[ch]) {

            int run, tindex;

            WMACoef *ptr, *eptr;

            tindex = (ch == 1 && s->ms_stereo);

            ptr = &s->coefs1[ch][0];

            eptr = ptr + nb_coefs[ch];



            run=0;

            for(;ptr < eptr; ptr++){

                if(*ptr){

                    int level= *ptr;

                    int abs_level= FFABS(level);

                    int code= 0;

                    if(abs_level <= s->coef_vlcs[tindex]->max_level){

                        if(run < s->coef_vlcs[tindex]->levels[abs_level-1])

                            code= run + s->int_table[tindex][abs_level-1];

                    }



                    assert(code < s->coef_vlcs[tindex]->n);

                    put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[code], s->coef_vlcs[tindex]->huffcodes[code]);



                    if(code == 0){

                        if(1<<coef_nb_bits <= abs_level)

                            return -1;





                        

                        if(abs_level == 0x71B && (s->avctx->flags & CODEC_FLAG_BITEXACT)) abs_level=0x71A;



                        put_bits(&s->pb, coef_nb_bits, abs_level);

                        put_bits(&s->pb, s->frame_len_bits, run);

                    }

                    put_bits(&s->pb, 1, level < 0); 

                    run=0;

                }else{

                    run++;

                }

            }

            if(run)

                put_bits(&s->pb, s->coef_vlcs[tindex]->huffbits[1], s->coef_vlcs[tindex]->huffcodes[1]);

        }

        if (s->version == 1 && s->nb_channels >= 2) {

            avpriv_align_put_bits(&s->pb);

        }

    }

    return 0;

}
