| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| /* |
| ------------------------------------------------------------------------------ |
| |
| PacketVideo Corp. |
| MP3 Decoder Library |
| |
| Filename: pvmp3_dct_16.cpp |
| |
| Functions: |
| dct_16 |
| pv_merge_in_place_N32 |
| pv_split |
| |
| Date: 09/21/2007 |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| dct_16 |
| |
| Input |
| int32 vec[], input vector length 16 |
| Int flag processing direction: forward (1), backward ( 0) |
| Returns |
| |
| int32 vec[], dct length 16 |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| pv_merge_in_place_N32 |
| |
| Input |
| int32 vec[], input vector length 16 |
| |
| Returns |
| |
| int32 vec[], merged output of two dct 16 to create a dct 32 |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| pv_split |
| |
| Input |
| int32 vec[], input vector length 16 |
| |
| Returns |
| |
| int32 vec[], splitted even/odd and pre processing rotation |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| dct 16 and tools to assemble a dct32 output |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| #if ( !defined(PV_ARM_GCC_V5) && !defined(PV_ARM_GCC_V4) ) |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #include "pvmp3_dct_16.h" |
| #include "pv_mp3dec_fxd_op.h" |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. Include conditional |
| ; compile variables also. |
| ----------------------------------------------------------------------------*/ |
| #define Qfmt(a) (int32)(a*((int32)1<<27)) |
| |
| /*---------------------------------------------------------------------------- |
| ; LOCAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; LOCAL STORE/BUFFER/POINTER DEFINITIONS |
| ; Variable declaration - defined here and used outside this module |
| ----------------------------------------------------------------------------*/ |
| const int32 CosTable_dct32[16] = |
| { |
| Qfmt_31(0.50060299823520F) , Qfmt_31(0.50547095989754F) , |
| Qfmt_31(0.51544730992262F) , Qfmt_31(0.53104259108978F) , |
| Qfmt_31(0.55310389603444F) , Qfmt_31(0.58293496820613F) , |
| Qfmt_31(0.62250412303566F) , Qfmt_31(0.67480834145501F) , |
| Qfmt_31(0.74453627100230F) , Qfmt_31(0.83934964541553F) , |
| |
| Qfmt(0.97256823786196F) , Qfmt(1.16943993343288F) , |
| Qfmt(1.48416461631417F) , Qfmt(2.05778100995341F) , |
| Qfmt(3.40760841846872F) , Qfmt(10.19000812354803F) |
| }; |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL FUNCTION REFERENCES |
| ; Declare functions defined elsewhere and referenced in this module |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES |
| ; Declare variables used in this module but defined elsewhere |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; FUNCTION CODE |
| ----------------------------------------------------------------------------*/ |
| |
| void pvmp3_dct_16(int32 vec[], int32 flag) |
| { |
| int32 tmp0; |
| int32 tmp1; |
| int32 tmp2; |
| int32 tmp3; |
| int32 tmp4; |
| int32 tmp5; |
| int32 tmp6; |
| int32 tmp7; |
| int32 tmp_o0; |
| int32 tmp_o1; |
| int32 tmp_o2; |
| int32 tmp_o3; |
| int32 tmp_o4; |
| int32 tmp_o5; |
| int32 tmp_o6; |
| int32 tmp_o7; |
| int32 itmp_e0; |
| int32 itmp_e1; |
| int32 itmp_e2; |
| |
| /* split input vector */ |
| |
| tmp_o0 = fxp_mul32_Q32((vec[ 0] - vec[15]), Qfmt_31(0.50241928618816F)); |
| tmp0 = vec[ 0] + vec[15]; |
| |
| tmp_o7 = fxp_mul32_Q32((vec[ 7] - vec[ 8]) << 3, Qfmt_31(0.63764357733614F)); |
| tmp7 = vec[ 7] + vec[ 8]; |
| |
| itmp_e0 = fxp_mul32_Q32((tmp0 - tmp7), Qfmt_31(0.50979557910416F)); |
| tmp7 = (tmp0 + tmp7); |
| |
| tmp_o1 = fxp_mul32_Q32((vec[ 1] - vec[14]), Qfmt_31(0.52249861493969F)); |
| tmp1 = vec[ 1] + vec[14]; |
| |
| tmp_o6 = fxp_mul32_Q32((vec[ 6] - vec[ 9]) << 1, Qfmt_31(0.86122354911916F)); |
| tmp6 = vec[ 6] + vec[ 9]; |
| |
| |
| |
| itmp_e1 = (tmp1 + tmp6); |
| tmp6 = fxp_mul32_Q32((tmp1 - tmp6), Qfmt_31(0.60134488693505F)); |
| |
| |
| |
| tmp_o2 = fxp_mul32_Q32((vec[ 2] - vec[13]), Qfmt_31(0.56694403481636F)); |
| tmp2 = vec[ 2] + vec[13]; |
| tmp_o5 = fxp_mul32_Q32((vec[ 5] - vec[10]) << 1, Qfmt_31(0.53033884299517F)); |
| tmp5 = vec[ 5] + vec[10]; |
| |
| itmp_e2 = (tmp2 + tmp5); |
| tmp5 = fxp_mul32_Q32((tmp2 - tmp5), Qfmt_31(0.89997622313642F)); |
| |
| tmp_o3 = fxp_mul32_Q32((vec[ 3] - vec[12]), Qfmt_31(0.64682178335999F)); |
| tmp3 = vec[ 3] + vec[12]; |
| tmp_o4 = fxp_mul32_Q32((vec[ 4] - vec[11]), Qfmt_31(0.78815462345125F)); |
| tmp4 = vec[ 4] + vec[11]; |
| |
| tmp1 = (tmp3 + tmp4); |
| tmp4 = fxp_mul32_Q32((tmp3 - tmp4) << 2, Qfmt_31(0.64072886193538F)); |
| |
| /* split even part of tmp_e */ |
| |
| tmp0 = (tmp7 + tmp1); |
| tmp1 = fxp_mul32_Q32((tmp7 - tmp1), Qfmt_31(0.54119610014620F)); |
| |
| tmp3 = fxp_mul32_Q32((itmp_e1 - itmp_e2) << 1, Qfmt_31(0.65328148243819F)); |
| tmp7 = (itmp_e1 + itmp_e2); |
| |
| vec[ 0] = (tmp0 + tmp7) >> 1; |
| vec[ 8] = fxp_mul32_Q32((tmp0 - tmp7), Qfmt_31(0.70710678118655F)); |
| tmp0 = fxp_mul32_Q32((tmp1 - tmp3) << 1, Qfmt_31(0.70710678118655F)); |
| vec[ 4] = tmp1 + tmp3 + tmp0; |
| vec[12] = tmp0; |
| |
| /* split odd part of tmp_e */ |
| |
| tmp1 = fxp_mul32_Q32((itmp_e0 - tmp4) << 1, Qfmt_31(0.54119610014620F)); |
| tmp7 = itmp_e0 + tmp4; |
| |
| tmp3 = fxp_mul32_Q32((tmp6 - tmp5) << 2, Qfmt_31(0.65328148243819F)); |
| tmp6 += tmp5; |
| |
| tmp4 = fxp_mul32_Q32((tmp7 - tmp6) << 1, Qfmt_31(0.70710678118655F)); |
| tmp6 += tmp7; |
| tmp7 = fxp_mul32_Q32((tmp1 - tmp3) << 1, Qfmt_31(0.70710678118655F)); |
| |
| tmp1 += tmp3 + tmp7; |
| vec[ 2] = tmp1 + tmp6; |
| vec[ 6] = tmp1 + tmp4; |
| vec[10] = tmp7 + tmp4; |
| vec[14] = tmp7; |
| |
| |
| // dct8; |
| |
| tmp1 = fxp_mul32_Q32((tmp_o0 - tmp_o7) << 1, Qfmt_31(0.50979557910416F)); |
| tmp7 = tmp_o0 + tmp_o7; |
| |
| tmp6 = tmp_o1 + tmp_o6; |
| tmp_o1 = fxp_mul32_Q32((tmp_o1 - tmp_o6) << 1, Qfmt_31(0.60134488693505F)); |
| |
| tmp5 = tmp_o2 + tmp_o5; |
| tmp_o5 = fxp_mul32_Q32((tmp_o2 - tmp_o5) << 1, Qfmt_31(0.89997622313642F)); |
| |
| tmp0 = fxp_mul32_Q32((tmp_o3 - tmp_o4) << 3, Qfmt_31(0.6407288619354F)); |
| tmp4 = tmp_o3 + tmp_o4; |
| |
| if (!flag) |
| { |
| tmp7 = -tmp7; |
| tmp1 = -tmp1; |
| tmp6 = -tmp6; |
| tmp_o1 = -tmp_o1; |
| tmp5 = -tmp5; |
| tmp_o5 = -tmp_o5; |
| tmp4 = -tmp4; |
| tmp0 = -tmp0; |
| } |
| |
| |
| tmp2 = fxp_mul32_Q32((tmp1 - tmp0) << 1, Qfmt_31(0.54119610014620F)); |
| tmp0 += tmp1; |
| tmp1 = fxp_mul32_Q32((tmp7 - tmp4) << 1, Qfmt_31(0.54119610014620F)); |
| tmp7 += tmp4; |
| tmp4 = fxp_mul32_Q32((tmp6 - tmp5) << 2, Qfmt_31(0.65328148243819F)); |
| tmp6 += tmp5; |
| tmp5 = fxp_mul32_Q32((tmp_o1 - tmp_o5) << 2, Qfmt_31(0.65328148243819F)); |
| tmp_o1 += tmp_o5; |
| |
| |
| vec[13] = fxp_mul32_Q32((tmp1 - tmp4) << 1, Qfmt_31(0.70710678118655F)); |
| vec[ 5] = tmp1 + tmp4 + vec[13]; |
| |
| vec[ 9] = fxp_mul32_Q32((tmp7 - tmp6) << 1, Qfmt_31(0.70710678118655F)); |
| vec[ 1] = tmp7 + tmp6; |
| |
| tmp4 = fxp_mul32_Q32((tmp0 - tmp_o1) << 1, Qfmt_31(0.70710678118655F)); |
| tmp0 += tmp_o1; |
| tmp6 = fxp_mul32_Q32((tmp2 - tmp5) << 1, Qfmt_31(0.70710678118655F)); |
| tmp2 += tmp5 + tmp6; |
| tmp0 += tmp2; |
| |
| vec[ 1] += tmp0; |
| vec[ 3] = tmp0 + vec[ 5]; |
| tmp2 += tmp4; |
| vec[ 5] = tmp2 + vec[ 5]; |
| vec[ 7] = tmp2 + vec[ 9]; |
| tmp4 += tmp6; |
| vec[ 9] = tmp4 + vec[ 9]; |
| vec[11] = tmp4 + vec[13]; |
| vec[13] = tmp6 + vec[13]; |
| vec[15] = tmp6; |
| |
| } |
| /*---------------------------------------------------------------------------- |
| ; FUNCTION CODE |
| ----------------------------------------------------------------------------*/ |
| void pvmp3_merge_in_place_N32(int32 vec[]) |
| { |
| |
| |
| int32 temp0; |
| int32 temp1; |
| int32 temp2; |
| int32 temp3; |
| |
| temp0 = vec[14]; |
| vec[14] = vec[ 7]; |
| temp1 = vec[12]; |
| vec[12] = vec[ 6]; |
| temp2 = vec[10]; |
| vec[10] = vec[ 5]; |
| temp3 = vec[ 8]; |
| vec[ 8] = vec[ 4]; |
| vec[ 6] = vec[ 3]; |
| vec[ 4] = vec[ 2]; |
| vec[ 2] = vec[ 1]; |
| |
| vec[ 1] = (vec[16] + vec[17]); |
| vec[16] = temp3; |
| vec[ 3] = (vec[18] + vec[17]); |
| vec[ 5] = (vec[19] + vec[18]); |
| vec[18] = vec[9]; |
| |
| vec[ 7] = (vec[20] + vec[19]); |
| vec[ 9] = (vec[21] + vec[20]); |
| vec[20] = temp2; |
| temp2 = vec[13]; |
| temp3 = vec[11]; |
| vec[11] = (vec[22] + vec[21]); |
| vec[13] = (vec[23] + vec[22]); |
| vec[22] = temp3; |
| temp3 = vec[15]; |
| |
| vec[15] = (vec[24] + vec[23]); |
| vec[17] = (vec[25] + vec[24]); |
| vec[19] = (vec[26] + vec[25]); |
| vec[21] = (vec[27] + vec[26]); |
| vec[23] = (vec[28] + vec[27]); |
| vec[24] = temp1; |
| vec[25] = (vec[29] + vec[28]); |
| vec[26] = temp2; |
| vec[27] = (vec[30] + vec[29]); |
| vec[28] = temp0; |
| vec[29] = (vec[30] + vec[31]); |
| vec[30] = temp3; |
| } |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; FUNCTION CODE |
| ----------------------------------------------------------------------------*/ |
| |
| |
| |
| void pvmp3_split(int32 *vect) |
| { |
| |
| int32 i; |
| const int32 *pt_cosTerms = &CosTable_dct32[15]; |
| int32 *pt_vect = vect; |
| int32 *pt_vect_2 = pt_vect - 1; |
| |
| for (i = 3; i != 0; i--) |
| { |
| int32 tmp2 = *(pt_vect); |
| int32 tmp1 = *(pt_vect_2); |
| int32 cosx = *(pt_cosTerms--); |
| *(pt_vect_2--) = (tmp1 + tmp2); |
| *(pt_vect++) = fxp_mul32_Q27((tmp1 - tmp2), cosx); |
| |
| tmp2 = *(pt_vect); |
| tmp1 = *(pt_vect_2); |
| cosx = *(pt_cosTerms--); |
| *(pt_vect_2--) = (tmp1 + tmp2); |
| *(pt_vect++) = fxp_mul32_Q27((tmp1 - tmp2), cosx); |
| |
| } |
| |
| for (i = 5; i != 0; i--) |
| { |
| int32 tmp2 = *(pt_vect); |
| int32 tmp1 = *(pt_vect_2); |
| int32 cosx = *(pt_cosTerms--); |
| *(pt_vect_2--) = (tmp1 + tmp2); |
| *(pt_vect++) = fxp_mul32_Q32((tmp1 - tmp2) << 1, cosx); |
| |
| tmp2 = *(pt_vect); |
| tmp1 = *(pt_vect_2); |
| cosx = *(pt_cosTerms--); |
| *(pt_vect_2--) = (tmp1 + tmp2); |
| *(pt_vect++) = fxp_mul32_Q32((tmp1 - tmp2) << 1, cosx); |
| } |
| |
| } |
| |
| #endif |