ac3_decoder/liba52/downmix.c

34 int a52_downmix_init (int input, int flags, sample_t * level,
77 	    *level *= LEVEL_3DB / (1 + clev);
84 	    *level *= LEVEL_3DB;
95 	    *level /= 1 + clev;
99 	    *level *= LEVEL_PLUS3DB / (2 + slev);
104 	    *level /= 1 + slev * LEVEL_3DB;
108 	    *level *= LEVEL_3DB / (1 + clev + 0.5 * slev);
112 	    *level /= 1 + clev + slev * LEVEL_3DB;
116 	    *level *= LEVEL_3DB / (1 + slev);
121 	    *level /= 1 + slev;
125 	    *level *= LEVEL_3DB / (1 + clev + slev);
129 	    *level /= 1 + clev + slev;
133 	    *level *= LEVEL_PLUS3DB;
138 	    *level *= 1 / (1 + LEVEL_3DB);
143 	    *level *= 1 / (1 + 2 * LEVEL_3DB);
147 	    *level *= 1 / (1 + 3 * LEVEL_3DB);
154 int a52_downmix_coeff (sample_t * coeff, int acmod, int output, sample_t level,
168 	coeff[0] = coeff[1] = coeff[2] = coeff[3] = coeff[4] = level;
172 	coeff[0] = coeff[1] = level * LEVEL_6DB;
176 	coeff[0] = coeff[1] = level * LEVEL_3DB;
180 	coeff[0] = coeff[2] = level * LEVEL_3DB;
181 	coeff[1] = level * clev * LEVEL_PLUS3DB;
185 	coeff[0] = coeff[1] = level * LEVEL_3DB;
186 	coeff[2] = level * slev * LEVEL_3DB;
190 	coeff[0] = coeff[1] = level * LEVEL_3DB;
191 	coeff[2] = coeff[3] = level * slev * LEVEL_3DB;
195 	coeff[0] = coeff[2] = level * LEVEL_3DB;
196 	coeff[1] = level * clev * LEVEL_PLUS3DB;
197 	coeff[3] = level * slev * LEVEL_3DB;
201 	coeff[0] = coeff[2] = level * LEVEL_3DB;
202 	coeff[1] = level * clev * LEVEL_PLUS3DB;
203 	coeff[3] = coeff[4] = level * slev * LEVEL_3DB;
207 	coeff[0] = level * LEVEL_3DB;
215 	coeff[0] = coeff[2] = coeff[3] = coeff[4] = level;
216 	coeff[1] = level * clev;
222 	coeff[0] = coeff[1] = level;
223 	coeff[2] = level * slev * LEVEL_3DB;
230 	coeff[0] = coeff[2] = level;
231 	coeff[1] = level * clev;
232 	coeff[3] = level * slev * LEVEL_3DB;
238 	coeff[0] = coeff[1] = level;
239 	coeff[2] = coeff[3] = level * slev;
247 	coeff[0] = coeff[2] = level;
248 	coeff[1] = level * clev;
249 	coeff[3] = coeff[4] = level * slev;
253 	coeff[0] = coeff[1] = coeff[2] = level;
254 	coeff[3] = level * slev * LEVEL_3DB;
258 	coeff[0] = coeff[1] = coeff[2] = level;
259 	coeff[3] = coeff[4] = level * slev;
263 	coeff[0] = coeff[1] = level;
264 	coeff[2] = coeff[3] = level * LEVEL_3DB;
268 	coeff[0] = coeff[1] = coeff[2] = level;
269 	coeff[3] = coeff[4] = level * LEVEL_3DB;
273 	coeff[0] = coeff[1] = level;
274 	coeff[2] = level * LEVEL_3DB;
278 	coeff[0] = coeff[2] = level;
279 	coeff[1] = level * clev;
280 	coeff[3] = level * LEVEL_3DB;
284 	coeff[0] = coeff[1] = coeff[2] = level;
285 	coeff[3] = level * LEVEL_3DB;
289 	coeff[0] = level;
295 	coeff[1] = level;