static int wma_decode_init(AVCodecContext * avctx)

{

    WMADecodeContext *s = avctx->priv_data;

    int i, flags1, flags2;

    float *window;

    uint8_t *extradata;

    float bps1, high_freq, bps;

    int sample_rate1;

    int coef_vlc_table;

    

    s->sample_rate = avctx->sample_rate;

    s->nb_channels = avctx->channels;

    s->bit_rate = avctx->bit_rate;

    s->block_align = avctx->block_align;



    if (avctx->codec_id == CODEC_ID_WMAV1) {

        s->version = 1;

    } else {

        s->version = 2;

    }

    

    /* extract flag infos */

    flags1 = 0;

    flags2 = 0;

    extradata = avctx->extradata;

    if (s->version == 1 && avctx->extradata_size >= 4) {

        flags1 = extradata[0] | (extradata[1] << 8);

        flags2 = extradata[2] | (extradata[3] << 8);

    } else if (s->version == 2 && avctx->extradata_size >= 6) {

        flags1 = extradata[0] | (extradata[1] << 8) | 

            (extradata[2] << 16) | (extradata[3] << 24);

        flags2 = extradata[4] | (extradata[5] << 8);

    }

    s->use_exp_vlc = flags2 & 0x0001;

    s->use_bit_reservoir = flags2 & 0x0002;

    s->use_variable_block_len = flags2 & 0x0004;



    /* compute MDCT block size */

    if (s->sample_rate <= 16000) {

        s->frame_len_bits = 9;

    } else if (s->sample_rate <= 22050 || 

               (s->sample_rate <= 32000 && s->version == 1)) {

        s->frame_len_bits = 10;

    } else {

        s->frame_len_bits = 11;

    }

    s->frame_len = 1 << s->frame_len_bits;

    if (s->use_variable_block_len) {

        s->nb_block_sizes = s->frame_len_bits - BLOCK_MIN_BITS + 1;

    } else {

        s->nb_block_sizes = 1;

    }



    /* init rate dependant parameters */

    s->use_noise_coding = 1;

    high_freq = s->sample_rate * 0.5;



    /* if version 2, then the rates are normalized */

    sample_rate1 = s->sample_rate;

    if (s->version == 2) {

        if (sample_rate1 >= 44100) 

            sample_rate1 = 44100;

        else if (sample_rate1 >= 22050) 

            sample_rate1 = 22050;

        else if (sample_rate1 >= 16000) 

            sample_rate1 = 16000;

        else if (sample_rate1 >= 11025) 

            sample_rate1 = 11025;

        else if (sample_rate1 >= 8000) 

            sample_rate1 = 8000;

    }



    bps = (float)s->bit_rate / (float)(s->nb_channels * s->sample_rate);

    s->byte_offset_bits = av_log2((int)(bps * s->frame_len / 8.0)) + 2;



    /* compute high frequency value and choose if noise coding should

       be activated */

    bps1 = bps;

    if (s->nb_channels == 2)

        bps1 = bps * 1.6;

    if (sample_rate1 == 44100) {

        if (bps1 >= 0.61)

            s->use_noise_coding = 0;

        else

            high_freq = high_freq * 0.4;

    } else if (sample_rate1 == 22050) {

        if (bps1 >= 1.16)

            s->use_noise_coding = 0;

        else if (bps1 >= 0.72) 

            high_freq = high_freq * 0.7;

        else

            high_freq = high_freq * 0.6;

    } else if (sample_rate1 == 16000) {

        if (bps > 0.5)

            high_freq = high_freq * 0.5;

        else

            high_freq = high_freq * 0.3;

    } else if (sample_rate1 == 11025) {

        high_freq = high_freq * 0.7;

    } else if (sample_rate1 == 8000) {

        if (bps <= 0.625) {

            high_freq = high_freq * 0.5;

        } else if (bps > 0.75) {

            s->use_noise_coding = 0;

        } else {

            high_freq = high_freq * 0.65;

        }

    } else {

        if (bps >= 0.8) {

            high_freq = high_freq * 0.75;

        } else if (bps >= 0.6) {

            high_freq = high_freq * 0.6;

        } else {

            high_freq = high_freq * 0.5;

        }

    }

#ifdef DEBUG_PARAMS

    printf("flags1=0x%x flags2=0x%x\n", flags1, flags2);

    printf("version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",

           s->version, s->nb_channels, s->sample_rate, s->bit_rate, 

           s->block_align);

    printf("bps=%f bps1=%f high_freq=%f bitoffset=%d\n", 

           bps, bps1, high_freq, s->byte_offset_bits);

    printf("use_noise_coding=%d use_exp_vlc=%d\n",

           s->use_noise_coding, s->use_exp_vlc);

#endif



    /* compute the scale factor band sizes for each MDCT block size */

    {

        int a, b, pos, lpos, k, block_len, i, j, n;

        const uint8_t *table;

        

        if (s->version == 1) {

            s->coefs_start = 3;

        } else {

            s->coefs_start = 0;

        }

        for(k = 0; k < s->nb_block_sizes; k++) {

            block_len = s->frame_len >> k;



            if (s->version == 1) {

                lpos = 0;

                for(i=0;i<25;i++) {

                    a = wma_critical_freqs[i];

                    b = s->sample_rate;

                    pos = ((block_len * 2 * a)  + (b >> 1)) / b;

                    if (pos > block_len) 

                        pos = block_len;

                    s->exponent_bands[0][i] = pos - lpos;

                    if (pos >= block_len) {

                        i++;

                        break;

                    }

                    lpos = pos;

                }

                s->exponent_sizes[0] = i;

            } else {

                /* hardcoded tables */

                table = NULL;

                a = s->frame_len_bits - BLOCK_MIN_BITS - k;

                if (a < 3) {

                    if (s->sample_rate >= 44100)

                        table = exponent_band_44100[a];

                    else if (s->sample_rate >= 32000)

                        table = exponent_band_32000[a];

                    else if (s->sample_rate >= 22050)

                        table = exponent_band_22050[a];

                }

                if (table) {

                    n = *table++;

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

                        s->exponent_bands[k][i] = table[i];

                    s->exponent_sizes[k] = n;

                } else {

                    j = 0;

                    lpos = 0;

                    for(i=0;i<25;i++) {

                        a = wma_critical_freqs[i];

                        b = s->sample_rate;

                        pos = ((block_len * 2 * a)  + (b << 1)) / (4 * b);

                        pos <<= 2;

                        if (pos > block_len) 

                            pos = block_len;

                        if (pos > lpos)

                            s->exponent_bands[k][j++] = pos - lpos;

                        if (pos >= block_len)

                            break;

                        lpos = pos;

                    }

                    s->exponent_sizes[k] = j;

                }

            }



            /* max number of coefs */

            s->coefs_end[k] = (s->frame_len - ((s->frame_len * 9) / 100)) >> k;

            /* high freq computation */

            s->high_band_start[k] = (int)((block_len * 2 * high_freq) / 

                                          s->sample_rate + 0.5);

            n = s->exponent_sizes[k];

            j = 0;

            pos = 0;

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

                int start, end;

                start = pos;

                pos += s->exponent_bands[k][i];

                end = pos;

                if (start < s->high_band_start[k])

                    start = s->high_band_start[k];

                if (end > s->coefs_end[k])

                    end = s->coefs_end[k];

                if (end > start)

                    s->exponent_high_bands[k][j++] = end - start;

            }

            s->exponent_high_sizes[k] = j;

#if 0

            trace("%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",

                  s->frame_len >> k, 

                  s->coefs_end[k],

                  s->high_band_start[k],

                  s->exponent_high_sizes[k]);

            for(j=0;j<s->exponent_high_sizes[k];j++)

                trace(" %d", s->exponent_high_bands[k][j]);

            trace("\n");

#endif

        }

    }



#ifdef DEBUG_TRACE

    {

        int i, j;

        for(i = 0; i < s->nb_block_sizes; i++) {

            trace("%5d: n=%2d:", 

                   s->frame_len >> i, 

                   s->exponent_sizes[i]);

            for(j=0;j<s->exponent_sizes[i];j++)

                trace(" %d", s->exponent_bands[i][j]);

            trace("\n");

        }

    }

#endif



    /* init MDCT */

    for(i = 0; i < s->nb_block_sizes; i++)

        ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1);

    

    /* init MDCT windows : simple sinus window */

    for(i = 0; i < s->nb_block_sizes; i++) {

        int n, j;

        float alpha;

        n = 1 << (s->frame_len_bits - i);

        window = av_malloc(sizeof(float) * n);

        alpha = M_PI / (2.0 * n);

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

            window[n - j - 1] = sin((j + 0.5) * alpha);

        }

        s->windows[i] = window;

    }



    s->reset_block_lengths = 1;

    

    if (s->use_noise_coding) {



        /* init the noise generator */

        if (s->use_exp_vlc)

            s->noise_mult = 0.02;

        else

            s->noise_mult = 0.04;

               

#if defined(DEBUG_TRACE)

        for(i=0;i<NOISE_TAB_SIZE;i++)

            s->noise_table[i] = 1.0 * s->noise_mult;

#else

        {

            unsigned int seed;

            float norm;

            seed = 1;

            norm = (1.0 / (float)(1LL << 31)) * sqrt(3) * s->noise_mult;

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

                seed = seed * 314159 + 1;

                s->noise_table[i] = (float)((int)seed) * norm;

            }

        }

#endif

        init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits), 

                 hgain_huffbits, 1, 1,

                 hgain_huffcodes, 2, 2);

    }



    if (s->use_exp_vlc) {

        init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits), 

                 scale_huffbits, 1, 1,

                 scale_huffcodes, 4, 4);

    } else {

        wma_lsp_to_curve_init(s, s->frame_len);

    }



    /* choose the VLC tables for the coefficients */

    coef_vlc_table = 2;

    if (s->sample_rate >= 32000) {

        if (bps1 < 0.72)

            coef_vlc_table = 0;

        else if (bps1 < 1.16)

            coef_vlc_table = 1;

    }



    init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],

                  &coef_vlcs[coef_vlc_table * 2]);

    init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],

                  &coef_vlcs[coef_vlc_table * 2 + 1]);

    return 0;

}

static int wma_decode_init(AVCodecContext * avctx)

{

    WMADecodeContext *s = avctx->priv_data;

    int i, flags1, flags2;

    float *window;

    uint8_t *extradata;

    float bps1, high_freq, bps;

    int sample_rate1;

    int coef_vlc_table;

    

    s->sample_rate = avctx->sample_rate;

    s->nb_channels = avctx->channels;

    s->bit_rate = avctx->bit_rate;

    s->block_align = avctx->block_align;



    if (avctx->codec_id == CODEC_ID_WMAV1) {

        s->version = 1;

    } else {

        s->version = 2;

    }

    

    

    flags1 = 0;

    flags2 = 0;

    extradata = avctx->extradata;

    if (s->version == 1 && avctx->extradata_size >= 4) {

        flags1 = extradata[0] | (extradata[1] << 8);

        flags2 = extradata[2] | (extradata[3] << 8);

    } else if (s->version == 2 && avctx->extradata_size >= 6) {

        flags1 = extradata[0] | (extradata[1] << 8) | 

            (extradata[2] << 16) | (extradata[3] << 24);

        flags2 = extradata[4] | (extradata[5] << 8);

    }

    s->use_exp_vlc = flags2 & 0x0001;

    s->use_bit_reservoir = flags2 & 0x0002;

    s->use_variable_block_len = flags2 & 0x0004;



    

    if (s->sample_rate <= 16000) {

        s->frame_len_bits = 9;

    } else if (s->sample_rate <= 22050 || 

               (s->sample_rate <= 32000 && s->version == 1)) {

        s->frame_len_bits = 10;

    } else {

        s->frame_len_bits = 11;

    }

    s->frame_len = 1 << s->frame_len_bits;

    if (s->use_variable_block_len) {

        s->nb_block_sizes = s->frame_len_bits - BLOCK_MIN_BITS + 1;

    } else {

        s->nb_block_sizes = 1;

    }



    

    s->use_noise_coding = 1;

    high_freq = s->sample_rate * 0.5;



    

    sample_rate1 = s->sample_rate;

    if (s->version == 2) {

        if (sample_rate1 >= 44100) 

            sample_rate1 = 44100;

        else if (sample_rate1 >= 22050) 

            sample_rate1 = 22050;

        else if (sample_rate1 >= 16000) 

            sample_rate1 = 16000;

        else if (sample_rate1 >= 11025) 

            sample_rate1 = 11025;

        else if (sample_rate1 >= 8000) 

            sample_rate1 = 8000;

    }



    bps = (float)s->bit_rate / (float)(s->nb_channels * s->sample_rate);

    s->byte_offset_bits = av_log2((int)(bps * s->frame_len / 8.0)) + 2;



    



    bps1 = bps;

    if (s->nb_channels == 2)

        bps1 = bps * 1.6;

    if (sample_rate1 == 44100) {

        if (bps1 >= 0.61)

            s->use_noise_coding = 0;

        else

            high_freq = high_freq * 0.4;

    } else if (sample_rate1 == 22050) {

        if (bps1 >= 1.16)

            s->use_noise_coding = 0;

        else if (bps1 >= 0.72) 

            high_freq = high_freq * 0.7;

        else

            high_freq = high_freq * 0.6;

    } else if (sample_rate1 == 16000) {

        if (bps > 0.5)

            high_freq = high_freq * 0.5;

        else

            high_freq = high_freq * 0.3;

    } else if (sample_rate1 == 11025) {

        high_freq = high_freq * 0.7;

    } else if (sample_rate1 == 8000) {

        if (bps <= 0.625) {

            high_freq = high_freq * 0.5;

        } else if (bps > 0.75) {

            s->use_noise_coding = 0;

        } else {

            high_freq = high_freq * 0.65;

        }

    } else {

        if (bps >= 0.8) {

            high_freq = high_freq * 0.75;

        } else if (bps >= 0.6) {

            high_freq = high_freq * 0.6;

        } else {

            high_freq = high_freq * 0.5;

        }

    }

#ifdef DEBUG_PARAMS

    printf("flags1=0x%x flags2=0x%x\n", flags1, flags2);

    printf("version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\n",

           s->version, s->nb_channels, s->sample_rate, s->bit_rate, 

           s->block_align);

    printf("bps=%f bps1=%f high_freq=%f bitoffset=%d\n", 

           bps, bps1, high_freq, s->byte_offset_bits);

    printf("use_noise_coding=%d use_exp_vlc=%d\n",

           s->use_noise_coding, s->use_exp_vlc);

#endif



    

    {

        int a, b, pos, lpos, k, block_len, i, j, n;

        const uint8_t *table;

        

        if (s->version == 1) {

            s->coefs_start = 3;

        } else {

            s->coefs_start = 0;

        }

        for(k = 0; k < s->nb_block_sizes; k++) {

            block_len = s->frame_len >> k;



            if (s->version == 1) {

                lpos = 0;

                for(i=0;i<25;i++) {

                    a = wma_critical_freqs[i];

                    b = s->sample_rate;

                    pos = ((block_len * 2 * a)  + (b >> 1)) / b;

                    if (pos > block_len) 

                        pos = block_len;

                    s->exponent_bands[0][i] = pos - lpos;

                    if (pos >= block_len) {

                        i++;

                        break;

                    }

                    lpos = pos;

                }

                s->exponent_sizes[0] = i;

            } else {

                

                table = NULL;

                a = s->frame_len_bits - BLOCK_MIN_BITS - k;

                if (a < 3) {

                    if (s->sample_rate >= 44100)

                        table = exponent_band_44100[a];

                    else if (s->sample_rate >= 32000)

                        table = exponent_band_32000[a];

                    else if (s->sample_rate >= 22050)

                        table = exponent_band_22050[a];

                }

                if (table) {

                    n = *table++;

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

                        s->exponent_bands[k][i] = table[i];

                    s->exponent_sizes[k] = n;

                } else {

                    j = 0;

                    lpos = 0;

                    for(i=0;i<25;i++) {

                        a = wma_critical_freqs[i];

                        b = s->sample_rate;

                        pos = ((block_len * 2 * a)  + (b << 1)) / (4 * b);

                        pos <<= 2;

                        if (pos > block_len) 

                            pos = block_len;

                        if (pos > lpos)

                            s->exponent_bands[k][j++] = pos - lpos;

                        if (pos >= block_len)

                            break;

                        lpos = pos;

                    }

                    s->exponent_sizes[k] = j;

                }

            }



            

            s->coefs_end[k] = (s->frame_len - ((s->frame_len * 9) / 100)) >> k;

            

            s->high_band_start[k] = (int)((block_len * 2 * high_freq) / 

                                          s->sample_rate + 0.5);

            n = s->exponent_sizes[k];

            j = 0;

            pos = 0;

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

                int start, end;

                start = pos;

                pos += s->exponent_bands[k][i];

                end = pos;

                if (start < s->high_band_start[k])

                    start = s->high_band_start[k];

                if (end > s->coefs_end[k])

                    end = s->coefs_end[k];

                if (end > start)

                    s->exponent_high_bands[k][j++] = end - start;

            }

            s->exponent_high_sizes[k] = j;

#if 0

            trace("%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",

                  s->frame_len >> k, 

                  s->coefs_end[k],

                  s->high_band_start[k],

                  s->exponent_high_sizes[k]);

            for(j=0;j<s->exponent_high_sizes[k];j++)

                trace(" %d", s->exponent_high_bands[k][j]);

            trace("\n");

#endif

        }

    }



#ifdef DEBUG_TRACE

    {

        int i, j;

        for(i = 0; i < s->nb_block_sizes; i++) {

            trace("%5d: n=%2d:", 

                   s->frame_len >> i, 

                   s->exponent_sizes[i]);

            for(j=0;j<s->exponent_sizes[i];j++)

                trace(" %d", s->exponent_bands[i][j]);

            trace("\n");

        }

    }

#endif



    

    for(i = 0; i < s->nb_block_sizes; i++)

        ff_mdct_init(&s->mdct_ctx[i], s->frame_len_bits - i + 1, 1);

    

    

    for(i = 0; i < s->nb_block_sizes; i++) {

        int n, j;

        float alpha;

        n = 1 << (s->frame_len_bits - i);

        window = av_malloc(sizeof(float) * n);

        alpha = M_PI / (2.0 * n);

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

            window[n - j - 1] = sin((j + 0.5) * alpha);

        }

        s->windows[i] = window;

    }



    s->reset_block_lengths = 1;

    

    if (s->use_noise_coding) {



        

        if (s->use_exp_vlc)

            s->noise_mult = 0.02;

        else

            s->noise_mult = 0.04;

               

#if defined(DEBUG_TRACE)

        for(i=0;i<NOISE_TAB_SIZE;i++)

            s->noise_table[i] = 1.0 * s->noise_mult;

#else

        {

            unsigned int seed;

            float norm;

            seed = 1;

            norm = (1.0 / (float)(1LL << 31)) * sqrt(3) * s->noise_mult;

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

                seed = seed * 314159 + 1;

                s->noise_table[i] = (float)((int)seed) * norm;

            }

        }

#endif

        init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits), 

                 hgain_huffbits, 1, 1,

                 hgain_huffcodes, 2, 2);

    }



    if (s->use_exp_vlc) {

        init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits), 

                 scale_huffbits, 1, 1,

                 scale_huffcodes, 4, 4);

    } else {

        wma_lsp_to_curve_init(s, s->frame_len);

    }



    

    coef_vlc_table = 2;

    if (s->sample_rate >= 32000) {

        if (bps1 < 0.72)

            coef_vlc_table = 0;

        else if (bps1 < 1.16)

            coef_vlc_table = 1;

    }



    init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],

                  &coef_vlcs[coef_vlc_table * 2]);

    init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],

                  &coef_vlcs[coef_vlc_table * 2 + 1]);

    return 0;

}

static int FUNC_0(AVCodecContext * VAR_0)

{

    WMADecodeContext *s = VAR_0->priv_data;

    int VAR_16, VAR_2, VAR_3;

    float *VAR_4;

    uint8_t *extradata;

    float VAR_5, VAR_6, VAR_7;

    int VAR_8;

    int VAR_9;

    

    s->sample_rate = VAR_0->sample_rate;

    s->nb_channels = VAR_0->channels;

    s->bit_rate = VAR_0->bit_rate;

    s->block_align = VAR_0->block_align;



    if (VAR_0->codec_id == CODEC_ID_WMAV1) {

        s->version = 1;

    } else {

        s->version = 2;

    }

    

    

    VAR_2 = 0;

    VAR_3 = 0;

    extradata = VAR_0->extradata;

    if (s->version == 1 && VAR_0->extradata_size >= 4) {

        VAR_2 = extradata[0] | (extradata[1] << 8);

        VAR_3 = extradata[2] | (extradata[3] << 8);

    } else if (s->version == 2 && VAR_0->extradata_size >= 6) {

        VAR_2 = extradata[0] | (extradata[1] << 8) | 

            (extradata[2] << 16) | (extradata[3] << 24);

        VAR_3 = extradata[4] | (extradata[5] << 8);

    }

    s->use_exp_vlc = VAR_3 & 0x0001;

    s->use_bit_reservoir = VAR_3 & 0x0002;

    s->use_variable_block_len = VAR_3 & 0x0004;



    

    if (s->sample_rate <= 16000) {

        s->frame_len_bits = 9;

    } else if (s->sample_rate <= 22050 || 

               (s->sample_rate <= 32000 && s->version == 1)) {

        s->frame_len_bits = 10;

    } else {

        s->frame_len_bits = 11;

    }

    s->frame_len = 1 << s->frame_len_bits;

    if (s->use_variable_block_len) {

        s->nb_block_sizes = s->frame_len_bits - BLOCK_MIN_BITS + 1;

    } else {

        s->nb_block_sizes = 1;

    }



    

    s->use_noise_coding = 1;

    VAR_6 = s->sample_rate * 0.5;



    

    VAR_8 = s->sample_rate;

    if (s->version == 2) {

        if (VAR_8 >= 44100) 

            VAR_8 = 44100;

        else if (VAR_8 >= 22050) 

            VAR_8 = 22050;

        else if (VAR_8 >= 16000) 

            VAR_8 = 16000;

        else if (VAR_8 >= 11025) 

            VAR_8 = 11025;

        else if (VAR_8 >= 8000) 

            VAR_8 = 8000;

    }



    VAR_7 = (float)s->bit_rate / (float)(s->nb_channels * s->sample_rate);

    s->byte_offset_bits = av_log2((int)(VAR_7 * s->frame_len / 8.0)) + 2;



    



    VAR_5 = VAR_7;

    if (s->nb_channels == 2)

        VAR_5 = VAR_7 * 1.6;

    if (VAR_8 == 44100) {

        if (VAR_5 >= 0.61)

            s->use_noise_coding = 0;

        else

            VAR_6 = VAR_6 * 0.4;

    } else if (VAR_8 == 22050) {

        if (VAR_5 >= 1.16)

            s->use_noise_coding = 0;

        else if (VAR_5 >= 0.72) 

            VAR_6 = VAR_6 * 0.7;

        else

            VAR_6 = VAR_6 * 0.6;

    } else if (VAR_8 == 16000) {

        if (VAR_7 > 0.5)

            VAR_6 = VAR_6 * 0.5;

        else

            VAR_6 = VAR_6 * 0.3;

    } else if (VAR_8 == 11025) {

        VAR_6 = VAR_6 * 0.7;

    } else if (VAR_8 == 8000) {

        if (VAR_7 <= 0.625) {

            VAR_6 = VAR_6 * 0.5;

        } else if (VAR_7 > 0.75) {

            s->use_noise_coding = 0;

        } else {

            VAR_6 = VAR_6 * 0.65;

        }

    } else {

        if (VAR_7 >= 0.8) {

            VAR_6 = VAR_6 * 0.75;

        } else if (VAR_7 >= 0.6) {

            VAR_6 = VAR_6 * 0.6;

        } else {

            VAR_6 = VAR_6 * 0.5;

        }

    }

#ifdef DEBUG_PARAMS

    printf("VAR_2=0x%x VAR_3=0x%x\VAR_17", VAR_2, VAR_3);

    printf("version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\VAR_17",

           s->version, s->nb_channels, s->sample_rate, s->bit_rate, 

           s->block_align);

    printf("VAR_7=%f VAR_5=%f VAR_6=%f bitoffset=%d\VAR_17", 

           VAR_7, VAR_5, VAR_6, s->byte_offset_bits);

    printf("use_noise_coding=%d use_exp_vlc=%d\VAR_17",

           s->use_noise_coding, s->use_exp_vlc);

#endif



    

    {

        int VAR_10, VAR_11, VAR_12, VAR_13, VAR_14, VAR_15, VAR_16, VAR_16, VAR_17;

        const uint8_t *VAR_18;

        

        if (s->version == 1) {

            s->coefs_start = 3;

        } else {

            s->coefs_start = 0;

        }

        for(VAR_14 = 0; VAR_14 < s->nb_block_sizes; VAR_14++) {

            VAR_15 = s->frame_len >> VAR_14;



            if (s->version == 1) {

                VAR_13 = 0;

                for(VAR_16=0;VAR_16<25;VAR_16++) {

                    VAR_10 = wma_critical_freqs[VAR_16];

                    VAR_11 = s->sample_rate;

                    VAR_12 = ((VAR_15 * 2 * VAR_10)  + (VAR_11 >> 1)) / VAR_11;

                    if (VAR_12 > VAR_15) 

                        VAR_12 = VAR_15;

                    s->exponent_bands[0][VAR_16] = VAR_12 - VAR_13;

                    if (VAR_12 >= VAR_15) {

                        VAR_16++;

                        break;

                    }

                    VAR_13 = VAR_12;

                }

                s->exponent_sizes[0] = VAR_16;

            } else {

                

                VAR_18 = NULL;

                VAR_10 = s->frame_len_bits - BLOCK_MIN_BITS - VAR_14;

                if (VAR_10 < 3) {

                    if (s->sample_rate >= 44100)

                        VAR_18 = exponent_band_44100[VAR_10];

                    else if (s->sample_rate >= 32000)

                        VAR_18 = exponent_band_32000[VAR_10];

                    else if (s->sample_rate >= 22050)

                        VAR_18 = exponent_band_22050[VAR_10];

                }

                if (VAR_18) {

                    VAR_17 = *VAR_18++;

                    for(VAR_16=0;VAR_16<VAR_17;VAR_16++)

                        s->exponent_bands[VAR_14][VAR_16] = VAR_18[VAR_16];

                    s->exponent_sizes[VAR_14] = VAR_17;

                } else {

                    VAR_16 = 0;

                    VAR_13 = 0;

                    for(VAR_16=0;VAR_16<25;VAR_16++) {

                        VAR_10 = wma_critical_freqs[VAR_16];

                        VAR_11 = s->sample_rate;

                        VAR_12 = ((VAR_15 * 2 * VAR_10)  + (VAR_11 << 1)) / (4 * VAR_11);

                        VAR_12 <<= 2;

                        if (VAR_12 > VAR_15) 

                            VAR_12 = VAR_15;

                        if (VAR_12 > VAR_13)

                            s->exponent_bands[VAR_14][VAR_16++] = VAR_12 - VAR_13;

                        if (VAR_12 >= VAR_15)

                            break;

                        VAR_13 = VAR_12;

                    }

                    s->exponent_sizes[VAR_14] = VAR_16;

                }

            }



            

            s->coefs_end[VAR_14] = (s->frame_len - ((s->frame_len * 9) / 100)) >> VAR_14;

            

            s->high_band_start[VAR_14] = (int)((VAR_15 * 2 * VAR_6) / 

                                          s->sample_rate + 0.5);

            VAR_17 = s->exponent_sizes[VAR_14];

            VAR_16 = 0;

            VAR_12 = 0;

            for(VAR_16=0;VAR_16<VAR_17;VAR_16++) {

                int start, end;

                start = VAR_12;

                VAR_12 += s->exponent_bands[VAR_14][VAR_16];

                end = VAR_12;

                if (start < s->high_band_start[VAR_14])

                    start = s->high_band_start[VAR_14];

                if (end > s->coefs_end[VAR_14])

                    end = s->coefs_end[VAR_14];

                if (end > start)

                    s->exponent_high_bands[VAR_14][VAR_16++] = end - start;

            }

            s->exponent_high_sizes[VAR_14] = VAR_16;

#if 0

            trace("%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",

                  s->frame_len >> VAR_14, 

                  s->coefs_end[VAR_14],

                  s->high_band_start[VAR_14],

                  s->exponent_high_sizes[VAR_14]);

            for(VAR_16=0;VAR_16<s->exponent_high_sizes[VAR_14];VAR_16++)

                trace(" %d", s->exponent_high_bands[VAR_14][VAR_16]);

            trace("\VAR_17");

#endif

        }

    }



#ifdef DEBUG_TRACE

    {

        int VAR_16, VAR_16;

        for(VAR_16 = 0; VAR_16 < s->nb_block_sizes; VAR_16++) {

            trace("%5d: VAR_17=%2d:", 

                   s->frame_len >> VAR_16, 

                   s->exponent_sizes[VAR_16]);

            for(VAR_16=0;VAR_16<s->exponent_sizes[VAR_16];VAR_16++)

                trace(" %d", s->exponent_bands[VAR_16][VAR_16]);

            trace("\VAR_17");

        }

    }

#endif



    

    for(VAR_16 = 0; VAR_16 < s->nb_block_sizes; VAR_16++)

        ff_mdct_init(&s->mdct_ctx[VAR_16], s->frame_len_bits - VAR_16 + 1, 1);

    

    

    for(VAR_16 = 0; VAR_16 < s->nb_block_sizes; VAR_16++) {

        int VAR_17, VAR_16;

        float alpha;

        VAR_17 = 1 << (s->frame_len_bits - VAR_16);

        VAR_4 = av_malloc(sizeof(float) * VAR_17);

        alpha = M_PI / (2.0 * VAR_17);

        for(VAR_16=0;VAR_16<VAR_17;VAR_16++) {

            VAR_4[VAR_17 - VAR_16 - 1] = sin((VAR_16 + 0.5) * alpha);

        }

        s->windows[VAR_16] = VAR_4;

    }



    s->reset_block_lengths = 1;

    

    if (s->use_noise_coding) {



        

        if (s->use_exp_vlc)

            s->noise_mult = 0.02;

        else

            s->noise_mult = 0.04;

               

#if defined(DEBUG_TRACE)

        for(VAR_16=0;VAR_16<NOISE_TAB_SIZE;VAR_16++)

            s->noise_table[VAR_16] = 1.0 * s->noise_mult;

#else

        {

            unsigned int VAR_19;

            float VAR_20;

            VAR_19 = 1;

            VAR_20 = (1.0 / (float)(1LL << 31)) * sqrt(3) * s->noise_mult;

            for(VAR_16=0;VAR_16<NOISE_TAB_SIZE;VAR_16++) {

                VAR_19 = VAR_19 * 314159 + 1;

                s->noise_table[VAR_16] = (float)((int)VAR_19) * VAR_20;

            }

        }

#endif

        init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits), 

                 hgain_huffbits, 1, 1,

                 hgain_huffcodes, 2, 2);

    }



    if (s->use_exp_vlc) {

        init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits), 

                 scale_huffbits, 1, 1,

                 scale_huffcodes, 4, 4);

    } else {

        wma_lsp_to_curve_init(s, s->frame_len);

    }



    

    VAR_9 = 2;

    if (s->sample_rate >= 32000) {

        if (VAR_5 < 0.72)

            VAR_9 = 0;

        else if (VAR_5 < 1.16)

            VAR_9 = 1;

    }



    init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],

                  &coef_vlcs[VAR_9 * 2]);

    init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],

                  &coef_vlcs[VAR_9 * 2 + 1]);

    return 0;

}

static int FUNC_0(AVCodecContext * VAR_0)
{ WMADecodeContext *s = VAR_0->priv_data; int VAR_16, VAR_2, VAR_3; float *VAR_4; uint8_t *extradata; float VAR_5, VAR_6, VAR_7; int VAR_8; int VAR_9; s->sample_rate = VAR_0->sample_rate; s->nb_channels = VAR_0->channels; s->bit_rate = VAR_0->bit_rate; s->block_align = VAR_0->block_align; if (VAR_0->codec_id == CODEC_ID_WMAV1) { s->version = 1; } else { s->version = 2; } VAR_2 = 0; VAR_3 = 0; extradata = VAR_0->extradata; if (s->version == 1 && VAR_0->extradata_size >= 4) { VAR_2 = extradata[0] | (extradata[1] << 8); VAR_3 = extradata[2] | (extradata[3] << 8); } else if (s->version == 2 && VAR_0->extradata_size >= 6) { VAR_2 = extradata[0] | (extradata[1] << 8) |
(extradata[2] << 16) | (extradata[3] << 24); VAR_3 = extradata[4] | (extradata[5] << 8); } s->use_exp_vlc = VAR_3 & 0x0001; s->use_bit_reservoir = VAR_3 & 0x0002; s->use_variable_block_len = VAR_3 & 0x0004; if (s->sample_rate <= 16000) { s->frame_len_bits = 9; } else if (s->sample_rate <= 22050 || (s->sample_rate <= 32000 && s->version == 1)) { s->frame_len_bits = 10; } else { s->frame_len_bits = 11; } s->frame_len = 1 << s->frame_len_bits; if (s->use_variable_block_len) { s->nb_block_sizes = s->frame_len_bits - BLOCK_MIN_BITS + 1; } else { s->nb_block_sizes = 1; } s->use_noise_coding = 1; VAR_6 = s->sample_rate * 0.5; VAR_8 = s->sample_rate; if (s->version == 2) { if (VAR_8 >= 44100)
VAR_8 = 44100; else if (VAR_8 >= 22050)
VAR_8 = 22050; else if (VAR_8 >= 16000)
VAR_8 = 16000; else if (VAR_8 >= 11025)
VAR_8 = 11025; else if (VAR_8 >= 8000)
VAR_8 = 8000; } VAR_7 = (float)s->bit_rate / (float)(s->nb_channels * s->sample_rate); s->byte_offset_bits = av_log2((int)(VAR_7 * s->frame_len / 8.0)) + 2; VAR_5 = VAR_7; if (s->nb_channels == 2)
VAR_5 = VAR_7 * 1.6; if (VAR_8 == 44100) { if (VAR_5 >= 0.61)
s->use_noise_coding = 0; else
VAR_6 = VAR_6 * 0.4; } else if (VAR_8 == 22050) { if (VAR_5 >= 1.16)
s->use_noise_coding = 0; else if (VAR_5 >= 0.72)
VAR_6 = VAR_6 * 0.7; else
VAR_6 = VAR_6 * 0.6; } else if (VAR_8 == 16000) { if (VAR_7 > 0.5)
VAR_6 = VAR_6 * 0.5; else
VAR_6 = VAR_6 * 0.3; } else if (VAR_8 == 11025) { VAR_6 = VAR_6 * 0.7; } else if (VAR_8 == 8000) { if (VAR_7 <= 0.625) { VAR_6 = VAR_6 * 0.5; } else if (VAR_7 > 0.75) { s->use_noise_coding = 0; } else { VAR_6 = VAR_6 * 0.65; } } else { if (VAR_7 >= 0.8) { VAR_6 = VAR_6 * 0.75; } else if (VAR_7 >= 0.6) { VAR_6 = VAR_6 * 0.6; } else { VAR_6 = VAR_6 * 0.5; } } #ifdef DEBUG_PARAMS
printf("VAR_2=0x%x VAR_3=0x%x\VAR_17", VAR_2, VAR_3); printf("version=%d channels=%d sample_rate=%d bitrate=%d block_align=%d\VAR_17",
s->version, s->nb_channels, s->sample_rate, s->bit_rate,
s->block_align); printf("VAR_7=%f VAR_5=%f VAR_6=%f bitoffset=%d\VAR_17",
VAR_7, VAR_5, VAR_6, s->byte_offset_bits); printf("use_noise_coding=%d use_exp_vlc=%d\VAR_17",
s->use_noise_coding, s->use_exp_vlc); #endif
{ int VAR_10, VAR_11, VAR_12, VAR_13, VAR_14, VAR_15, VAR_16, VAR_16, VAR_17; const uint8_t *VAR_18; if (s->version == 1) { s->coefs_start = 3; } else { s->coefs_start = 0; } for(VAR_14 = 0; VAR_14 < s->nb_block_sizes; VAR_14++) { VAR_15 = s->frame_len >> VAR_14; if (s->version == 1) { VAR_13 = 0; for(VAR_16=0;VAR_16<25;VAR_16++) { VAR_10 = wma_critical_freqs[VAR_16]; VAR_11 = s->sample_rate; VAR_12 = ((VAR_15 * 2 * VAR_10)  + (VAR_11 >> 1)) / VAR_11; if (VAR_12 > VAR_15)
VAR_12 = VAR_15; s->exponent_bands[0][VAR_16] = VAR_12 - VAR_13; if (VAR_12 >= VAR_15) { VAR_16++; break; } VAR_13 = VAR_12; } s->exponent_sizes[0] = VAR_16; } else { VAR_18 = NULL; VAR_10 = s->frame_len_bits - BLOCK_MIN_BITS - VAR_14; if (VAR_10 < 3) { if (s->sample_rate >= 44100)
VAR_18 = exponent_band_44100[VAR_10]; else if (s->sample_rate >= 32000)
VAR_18 = exponent_band_32000[VAR_10]; else if (s->sample_rate >= 22050)
VAR_18 = exponent_band_22050[VAR_10]; } if (VAR_18) { VAR_17 = *VAR_18++; for(VAR_16=0;VAR_16<VAR_17;VAR_16++) s->exponent_bands[VAR_14][VAR_16] = VAR_18[VAR_16]; s->exponent_sizes[VAR_14] = VAR_17; } else { VAR_16 = 0; VAR_13 = 0; for(VAR_16=0;VAR_16<25;VAR_16++) { VAR_10 = wma_critical_freqs[VAR_16]; VAR_11 = s->sample_rate; VAR_12 = ((VAR_15 * 2 * VAR_10)  + (VAR_11 << 1)) / (4 * VAR_11); VAR_12 <<= 2; if (VAR_12 > VAR_15)
VAR_12 = VAR_15; if (VAR_12 > VAR_13)
s->exponent_bands[VAR_14][VAR_16++] = VAR_12 - VAR_13; if (VAR_12 >= VAR_15)
break; VAR_13 = VAR_12; } s->exponent_sizes[VAR_14] = VAR_16; } } s->coefs_end[VAR_14] = (s->frame_len - ((s->frame_len * 9) / 100)) >> VAR_14; s->high_band_start[VAR_14] = (int)((VAR_15 * 2 * VAR_6) /
s->sample_rate + 0.5); VAR_17 = s->exponent_sizes[VAR_14]; VAR_16 = 0; VAR_12 = 0; for(VAR_16=0;VAR_16<VAR_17;VAR_16++) { int start, end; start = VAR_12; VAR_12 += s->exponent_bands[VAR_14][VAR_16]; end = VAR_12; if (start < s->high_band_start[VAR_14])
start = s->high_band_start[VAR_14]; if (end > s->coefs_end[VAR_14])
end = s->coefs_end[VAR_14]; if (end > start)
s->exponent_high_bands[VAR_14][VAR_16++] = end - start; } s->exponent_high_sizes[VAR_14] = VAR_16; #if 0
trace("%5d: coefs_end=%d high_band_start=%d nb_high_bands=%d: ",
s->frame_len >> VAR_14,
s->coefs_end[VAR_14],
s->high_band_start[VAR_14],
s->exponent_high_sizes[VAR_14]); for(VAR_16=0;VAR_16<s->exponent_high_sizes[VAR_14];VAR_16++) trace(" %d", s->exponent_high_bands[VAR_14][VAR_16]); trace("\VAR_17"); #endif
} } #ifdef DEBUG_TRACE
{ int VAR_16, VAR_16; for(VAR_16 = 0; VAR_16 < s->nb_block_sizes; VAR_16++) { trace("%5d: VAR_17=%2d:",
s->frame_len >> VAR_16,
s->exponent_sizes[VAR_16]); for(VAR_16=0;VAR_16<s->exponent_sizes[VAR_16];VAR_16++) trace(" %d", s->exponent_bands[VAR_16][VAR_16]); trace("\VAR_17"); } } #endif
for(VAR_16 = 0; VAR_16 < s->nb_block_sizes; VAR_16++) ff_mdct_init(&s->mdct_ctx[VAR_16], s->frame_len_bits - VAR_16 + 1, 1); for(VAR_16 = 0; VAR_16 < s->nb_block_sizes; VAR_16++) { int VAR_17, VAR_16; float alpha; VAR_17 = 1 << (s->frame_len_bits - VAR_16); VAR_4 = av_malloc(sizeof(float) * VAR_17); alpha = M_PI / (2.0 * VAR_17); for(VAR_16=0;VAR_16<VAR_17;VAR_16++) { VAR_4[VAR_17 - VAR_16 - 1] = sin((VAR_16 + 0.5) * alpha); } s->windows[VAR_16] = VAR_4; } s->reset_block_lengths = 1; if (s->use_noise_coding) { if (s->use_exp_vlc)
s->noise_mult = 0.02; else
s->noise_mult = 0.04; #if defined(DEBUG_TRACE)
for(VAR_16=0;VAR_16<NOISE_TAB_SIZE;VAR_16++) s->noise_table[VAR_16] = 1.0 * s->noise_mult; #else
{ unsigned int VAR_19; float VAR_20; VAR_19 = 1; VAR_20 = (1.0 / (float)(1LL << 31)) * sqrt(3) * s->noise_mult; for(VAR_16=0;VAR_16<NOISE_TAB_SIZE;VAR_16++) { VAR_19 = VAR_19 * 314159 + 1; s->noise_table[VAR_16] = (float)((int)VAR_19) * VAR_20; } } #endif
init_vlc(&s->hgain_vlc, 9, sizeof(hgain_huffbits),
hgain_huffbits, 1, 1,
hgain_huffcodes, 2, 2); } if (s->use_exp_vlc) { init_vlc(&s->exp_vlc, 9, sizeof(scale_huffbits),
scale_huffbits, 1, 1,
scale_huffcodes, 4, 4); } else { wma_lsp_to_curve_init(s, s->frame_len); } VAR_9 = 2; if (s->sample_rate >= 32000) { if (VAR_5 < 0.72)
VAR_9 = 0; else if (VAR_5 < 1.16)
VAR_9 = 1; } init_coef_vlc(&s->coef_vlc[0], &s->run_table[0], &s->level_table[0],
&coef_vlcs[VAR_9 * 2]); init_coef_vlc(&s->coef_vlc[1], &s->run_table[1], &s->level_table[1],
&coef_vlcs[VAR_9 * 2 + 1]); return 0; }