1 /* ------------------------------------------------------------------
2 * Copyright (C) 1998-2009 PacketVideo
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
14 * See the License for the specific language governing permissions
15 * and limitations under the License.
16 * -------------------------------------------------------------------
19 ------------------------------------------------------------------------------
24 Filename: pvmp3_dct_16.cpp
33 ------------------------------------------------------------------------------
39 ------------------------------------------------------------------------------
40 INPUT AND OUTPUT DEFINITIONS
45 int32 vec[], input vector length 16
46 Int flag processing direction: forward (1), backward ( 0)
49 int32 vec[], dct length 16
51 ------------------------------------------------------------------------------
52 INPUT AND OUTPUT DEFINITIONS
57 int32 vec[], input vector length 16
61 int32 vec[], merged output of two dct 16 to create a dct 32
63 ------------------------------------------------------------------------------
64 INPUT AND OUTPUT DEFINITIONS
69 int32 vec[], input vector length 16
73 int32 vec[], splitted even/odd and pre processing rotation
75 ------------------------------------------------------------------------------
78 dct 16 and tools to assemble a dct32 output
80 ------------------------------------------------------------------------------
84 ------------------------------------------------------------------------------
87 ------------------------------------------------------------------------------
90 ------------------------------------------------------------------------------
93 #if ( !defined(PV_ARM_GCC_V5) && !defined(PV_ARM_GCC_V4) )
94 /*----------------------------------------------------------------------------
96 ----------------------------------------------------------------------------*/
98 #include "pvmp3_dct_16.h"
99 #include "pv_mp3dec_fxd_op.h"
101 /*----------------------------------------------------------------------------
103 ; Define module specific macros here
104 ----------------------------------------------------------------------------*/
107 /*----------------------------------------------------------------------------
109 ; Include all pre-processor statements here. Include conditional
110 ; compile variables also.
111 ----------------------------------------------------------------------------*/
112 #define Qfmt(a) (int32)(a*((int32)1<<27))
114 /*----------------------------------------------------------------------------
115 ; LOCAL FUNCTION DEFINITIONS
116 ; Function Prototype declaration
117 ----------------------------------------------------------------------------*/
119 /*----------------------------------------------------------------------------
120 ; LOCAL STORE/BUFFER/POINTER DEFINITIONS
121 ; Variable declaration - defined here and used outside this module
122 ----------------------------------------------------------------------------*/
123 const int32 CosTable_dct32[16] =
125 Qfmt_31(0.50060299823520F) , Qfmt_31(0.50547095989754F) ,
126 Qfmt_31(0.51544730992262F) , Qfmt_31(0.53104259108978F) ,
127 Qfmt_31(0.55310389603444F) , Qfmt_31(0.58293496820613F) ,
128 Qfmt_31(0.62250412303566F) , Qfmt_31(0.67480834145501F) ,
129 Qfmt_31(0.74453627100230F) , Qfmt_31(0.83934964541553F) ,
131 Qfmt(0.97256823786196F) , Qfmt(1.16943993343288F) ,
132 Qfmt(1.48416461631417F) , Qfmt(2.05778100995341F) ,
133 Qfmt(3.40760841846872F) , Qfmt(10.19000812354803F)
137 /*----------------------------------------------------------------------------
138 ; EXTERNAL FUNCTION REFERENCES
139 ; Declare functions defined elsewhere and referenced in this module
140 ----------------------------------------------------------------------------*/
142 /*----------------------------------------------------------------------------
143 ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
144 ; Declare variables used in this module but defined elsewhere
145 ----------------------------------------------------------------------------*/
148 /*----------------------------------------------------------------------------
150 ----------------------------------------------------------------------------*/
152 void pvmp3_dct_16(int32 vec[], int32 flag)
174 /* split input vector */
176 tmp_o0 = fxp_mul32_Q32((vec[ 0] - vec[15]), Qfmt_31(0.50241928618816F));
177 tmp0 = vec[ 0] + vec[15];
179 tmp_o7 = fxp_mul32_Q32((vec[ 7] - vec[ 8]) << 3, Qfmt_31(0.63764357733614F));
180 tmp7 = vec[ 7] + vec[ 8];
182 itmp_e0 = fxp_mul32_Q32((tmp0 - tmp7), Qfmt_31(0.50979557910416F));
183 tmp7 = (tmp0 + tmp7);
185 tmp_o1 = fxp_mul32_Q32((vec[ 1] - vec[14]), Qfmt_31(0.52249861493969F));
186 tmp1 = vec[ 1] + vec[14];
188 tmp_o6 = fxp_mul32_Q32((vec[ 6] - vec[ 9]) << 1, Qfmt_31(0.86122354911916F));
189 tmp6 = vec[ 6] + vec[ 9];
193 itmp_e1 = (tmp1 + tmp6);
194 tmp6 = fxp_mul32_Q32((tmp1 - tmp6), Qfmt_31(0.60134488693505F));
198 tmp_o2 = fxp_mul32_Q32((vec[ 2] - vec[13]), Qfmt_31(0.56694403481636F));
199 tmp2 = vec[ 2] + vec[13];
200 tmp_o5 = fxp_mul32_Q32((vec[ 5] - vec[10]) << 1, Qfmt_31(0.53033884299517F));
201 tmp5 = vec[ 5] + vec[10];
203 itmp_e2 = (tmp2 + tmp5);
204 tmp5 = fxp_mul32_Q32((tmp2 - tmp5), Qfmt_31(0.89997622313642F));
206 tmp_o3 = fxp_mul32_Q32((vec[ 3] - vec[12]), Qfmt_31(0.64682178335999F));
207 tmp3 = vec[ 3] + vec[12];
208 tmp_o4 = fxp_mul32_Q32((vec[ 4] - vec[11]), Qfmt_31(0.78815462345125F));
209 tmp4 = vec[ 4] + vec[11];
211 tmp1 = (tmp3 + tmp4);
212 tmp4 = fxp_mul32_Q32((tmp3 - tmp4) << 2, Qfmt_31(0.64072886193538F));
214 /* split even part of tmp_e */
216 tmp0 = (tmp7 + tmp1);
217 tmp1 = fxp_mul32_Q32((tmp7 - tmp1), Qfmt_31(0.54119610014620F));
219 tmp3 = fxp_mul32_Q32((itmp_e1 - itmp_e2) << 1, Qfmt_31(0.65328148243819F));
220 tmp7 = (itmp_e1 + itmp_e2);
222 vec[ 0] = (tmp0 + tmp7) >> 1;
223 vec[ 8] = fxp_mul32_Q32((tmp0 - tmp7), Qfmt_31(0.70710678118655F));
224 tmp0 = fxp_mul32_Q32((tmp1 - tmp3) << 1, Qfmt_31(0.70710678118655F));
225 vec[ 4] = tmp1 + tmp3 + tmp0;
228 /* split odd part of tmp_e */
230 tmp1 = fxp_mul32_Q32((itmp_e0 - tmp4) << 1, Qfmt_31(0.54119610014620F));
231 tmp7 = itmp_e0 + tmp4;
233 tmp3 = fxp_mul32_Q32((tmp6 - tmp5) << 2, Qfmt_31(0.65328148243819F));
236 tmp4 = fxp_mul32_Q32((tmp7 - tmp6) << 1, Qfmt_31(0.70710678118655F));
238 tmp7 = fxp_mul32_Q32((tmp1 - tmp3) << 1, Qfmt_31(0.70710678118655F));
241 vec[ 2] = tmp1 + tmp6;
242 vec[ 6] = tmp1 + tmp4;
243 vec[10] = tmp7 + tmp4;
249 tmp1 = fxp_mul32_Q32((tmp_o0 - tmp_o7) << 1, Qfmt_31(0.50979557910416F));
250 tmp7 = tmp_o0 + tmp_o7;
252 tmp6 = tmp_o1 + tmp_o6;
253 tmp_o1 = fxp_mul32_Q32((tmp_o1 - tmp_o6) << 1, Qfmt_31(0.60134488693505F));
255 tmp5 = tmp_o2 + tmp_o5;
256 tmp_o5 = fxp_mul32_Q32((tmp_o2 - tmp_o5) << 1, Qfmt_31(0.89997622313642F));
258 tmp0 = fxp_mul32_Q32((tmp_o3 - tmp_o4) << 3, Qfmt_31(0.6407288619354F));
259 tmp4 = tmp_o3 + tmp_o4;
274 tmp2 = fxp_mul32_Q32((tmp1 - tmp0) << 1, Qfmt_31(0.54119610014620F));
276 tmp1 = fxp_mul32_Q32((tmp7 - tmp4) << 1, Qfmt_31(0.54119610014620F));
278 tmp4 = fxp_mul32_Q32((tmp6 - tmp5) << 2, Qfmt_31(0.65328148243819F));
280 tmp5 = fxp_mul32_Q32((tmp_o1 - tmp_o5) << 2, Qfmt_31(0.65328148243819F));
284 vec[13] = fxp_mul32_Q32((tmp1 - tmp4) << 1, Qfmt_31(0.70710678118655F));
285 vec[ 5] = tmp1 + tmp4 + vec[13];
287 vec[ 9] = fxp_mul32_Q32((tmp7 - tmp6) << 1, Qfmt_31(0.70710678118655F));
288 vec[ 1] = tmp7 + tmp6;
290 tmp4 = fxp_mul32_Q32((tmp0 - tmp_o1) << 1, Qfmt_31(0.70710678118655F));
292 tmp6 = fxp_mul32_Q32((tmp2 - tmp5) << 1, Qfmt_31(0.70710678118655F));
297 vec[ 3] = tmp0 + vec[ 5];
299 vec[ 5] = tmp2 + vec[ 5];
300 vec[ 7] = tmp2 + vec[ 9];
302 vec[ 9] = tmp4 + vec[ 9];
303 vec[11] = tmp4 + vec[13];
304 vec[13] = tmp6 + vec[13];
308 /*----------------------------------------------------------------------------
310 ----------------------------------------------------------------------------*/
311 void pvmp3_merge_in_place_N32(int32 vec[])
332 vec[ 1] = (vec[16] + vec[17]);
334 vec[ 3] = (vec[18] + vec[17]);
335 vec[ 5] = (vec[19] + vec[18]);
338 vec[ 7] = (vec[20] + vec[19]);
339 vec[ 9] = (vec[21] + vec[20]);
343 vec[11] = (vec[22] + vec[21]);
344 vec[13] = (vec[23] + vec[22]);
348 vec[15] = (vec[24] + vec[23]);
349 vec[17] = (vec[25] + vec[24]);
350 vec[19] = (vec[26] + vec[25]);
351 vec[21] = (vec[27] + vec[26]);
352 vec[23] = (vec[28] + vec[27]);
354 vec[25] = (vec[29] + vec[28]);
356 vec[27] = (vec[30] + vec[29]);
358 vec[29] = (vec[30] + vec[31]);
363 /*----------------------------------------------------------------------------
365 ----------------------------------------------------------------------------*/
369 void pvmp3_split(int32 *vect)
373 const int32 *pt_cosTerms = &CosTable_dct32[15];
374 int32 *pt_vect = vect;
375 int32 *pt_vect_2 = pt_vect - 1;
377 for (i = 3; i != 0; i--)
379 int32 tmp2 = *(pt_vect);
380 int32 tmp1 = *(pt_vect_2);
381 int32 cosx = *(pt_cosTerms--);
382 *(pt_vect_2--) = (tmp1 + tmp2);
383 *(pt_vect++) = fxp_mul32_Q27((tmp1 - tmp2), cosx);
387 cosx = *(pt_cosTerms--);
388 *(pt_vect_2--) = (tmp1 + tmp2);
389 *(pt_vect++) = fxp_mul32_Q27((tmp1 - tmp2), cosx);
393 for (i = 5; i != 0; i--)
395 int32 tmp2 = *(pt_vect);
396 int32 tmp1 = *(pt_vect_2);
397 int32 cosx = *(pt_cosTerms--);
398 *(pt_vect_2--) = (tmp1 + tmp2);
399 *(pt_vect++) = fxp_mul32_Q32((tmp1 - tmp2) << 1, cosx);
403 cosx = *(pt_cosTerms--);
404 *(pt_vect_2--) = (tmp1 + tmp2);
405 *(pt_vect++) = fxp_mul32_Q32((tmp1 - tmp2) << 1, cosx);