Cross Reference: /external/speex/libspeex/filterbank.c

Lines Matching refs:bank
56    FilterBank *bank;
66    bank = (FilterBank*)speex_alloc(sizeof(FilterBank));
67    bank->nb_banks = banks;
68    bank->len = len;
69    bank->bank_left = (int*)speex_alloc(len*sizeof(int));
70    bank->bank_right = (int*)speex_alloc(len*sizeof(int));
71    bank->filter_left = (spx_word16_t*)speex_alloc(len*sizeof(spx_word16_t));
72    bank->filter_right = (spx_word16_t*)speex_alloc(len*sizeof(spx_word16_t));
75    bank->scaling = (float*)speex_alloc(banks*sizeof(float));
99       bank->bank_left[i] = id1;
100       bank->filter_left[i] = SUB16(Q15_ONE,val);
101       bank->bank_right[i] = id2;
102       bank->filter_right[i] = val;
107    for (i=0;i<bank->nb_banks;i++)
108       bank->scaling[i] = 0;
109    for (i=0;i<bank->len;i++)
111       int id = bank->bank_left[i];
112       bank->scaling[id] += bank->filter_left[i];
113       id = bank->bank_right[i];
114       bank->scaling[id] += bank->filter_right[i];
116    for (i=0;i<bank->nb_banks;i++)
117       bank->scaling[i] = Q15_ONE/(bank->scaling[i]);
119    return bank;
122 void filterbank_destroy(FilterBank *bank)
124    speex_free(bank->bank_left);
125    speex_free(bank->bank_right);
126    speex_free(bank->filter_left);
127    speex_free(bank->filter_right);
129    speex_free(bank->scaling);
131    speex_free(bank);
134 void filterbank_compute_bank32(FilterBank *bank, spx_word32_t *ps, spx_word32_t *mel)
137    for (i=0;i<bank->nb_banks;i++)
140    for (i=0;i<bank->len;i++)
143       id = bank->bank_left[i];
144       mel[id] += MULT16_32_P15(bank->filter_left[i],ps[i]);
145       id = bank->bank_right[i];
146       mel[id] += MULT16_32_P15(bank->filter_right[i],ps[i]);
150    /*for (i=0;i<bank->nb_banks;i++)
151       mel[i] = MULT16_32_P15(Q15(bank->scaling[i]),mel[i]);
156 void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *ps)
159    for (i=0;i<bank->len;i++)
163       id1 = bank->bank_left[i];
164       id2 = bank->bank_right[i];
165       tmp = MULT16_16(mel[id1],bank->filter_left[i]);
166       tmp += MULT16_16(mel[id2],bank->filter_right[i]);
173 void filterbank_compute_bank(FilterBank *bank, float *ps, float *mel)
176    for (i=0;i<bank->nb_banks;i++)
179    for (i=0;i<bank->len;i++)
181       int id = bank->bank_left[i];
182       mel[id] += bank->filter_left[i]*ps[i];
183       id = bank->bank_right[i];
184       mel[id] += bank->filter_right[i]*ps[i];
186    for (i=0;i<bank->nb_banks;i++)
187       mel[i] *= bank->scaling[i];
190 void filterbank_compute_psd(FilterBank *bank, float *mel, float *ps)
193    for (i=0;i<bank->len;i++)
195       int id = bank->bank_left[i];
196       ps[i] = mel[id]*bank->filter_left[i];
197       id = bank->bank_right[i];
198       ps[i] += mel[id]*bank->filter_right[i];
202 void filterbank_psy_smooth(FilterBank *bank, float *ps, float *mask)
213    filterbank_compute_bank(bank, ps, bark);
214    for (i=1;i<bank->nb_banks;i++)
220    for (i=bank->nb_banks-2;i>=0;i--)
224    filterbank_compute_psd(bank, bark, mask);