X-Git-Url: http://git.cinelerra-gg.org/git/?a=blobdiff_plain;f=cinelerra-5.1%2Flibzmpeg3%2Faudio%2Fdct.C;fp=cinelerra-5.1%2Flibzmpeg3%2Faudio%2Fdct.C;h=fb440d05d69fef618367fa371ad068a3abeb4da9;hb=30bdb85eb33a8ee7ba675038a86c6be59c43d7bd;hp=0000000000000000000000000000000000000000;hpb=52fcc46226f9df46f9ce9d0566dc568455a7db0b;p=goodguy%2Fhistory.git

diff --git a/cinelerra-5.1/libzmpeg3/audio/dct.C b/cinelerra-5.1/libzmpeg3/audio/dct.C
new file mode 100644
index 00000000..fb440d05
--- /dev/null
+++ b/cinelerra-5.1/libzmpeg3/audio/dct.C
@@ -0,0 +1,617 @@
+/* 
+ *
+ *  This file is part of libmpeg3
+ *  
+ *  libmpeg3 is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *   
+ *  libmpeg3 is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *   
+ *  You should have received a copy of the GNU General Public License
+ *  along with GNU Make; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. 
+ *
+ */
+
+/*
+ * Discrete Cosine Tansform (DCT) for subband synthesis
+ * optimized for machines with no auto-increment. 
+ * The performance is highly compiler dependend. Maybe
+ * the dct64.c version for 'normal' processor may be faster
+ * even for Intel processors.
+ */
+
+#include "../libzmpeg3.h"
+
+int zaudio_decoder_layer_t::
+dct64_1(float *out0, float *out1, float *b1, float *b2, float *samples)
+{
+  register float *costab = pnts[0];
+
+  b1[0x00] = samples[0x00] + samples[0x1F];
+  b1[0x01] = samples[0x01] + samples[0x1E];
+  b1[0x1F] = (samples[0x00] - samples[0x1F]) * costab[0x0];
+  b1[0x1E] = (samples[0x01] - samples[0x1E]) * costab[0x1];
+
+  b1[0x02] = samples[0x02] + samples[0x1D];
+  b1[0x03] = samples[0x03] + samples[0x1C];
+  b1[0x1D] = (samples[0x02] - samples[0x1D]) * costab[0x2];
+  b1[0x1C] = (samples[0x03] - samples[0x1C]) * costab[0x3];
+
+  b1[0x04] = samples[0x04] + samples[0x1B];
+  b1[0x05] = samples[0x05] + samples[0x1A];
+  b1[0x1B] = (samples[0x04] - samples[0x1B]) * costab[0x4];
+  b1[0x1A] = (samples[0x05] - samples[0x1A]) * costab[0x5];
+
+  b1[0x06] = samples[0x06] + samples[0x19];
+  b1[0x07] = samples[0x07] + samples[0x18];
+  b1[0x19] = (samples[0x06] - samples[0x19]) * costab[0x6];
+  b1[0x18] = (samples[0x07] - samples[0x18]) * costab[0x7];
+
+  b1[0x08] = samples[0x08] + samples[0x17];
+  b1[0x09] = samples[0x09] + samples[0x16];
+  b1[0x17] = (samples[0x08] - samples[0x17]) * costab[0x8];
+  b1[0x16] = (samples[0x09] - samples[0x16]) * costab[0x9];
+
+  b1[0x0A] = samples[0x0A] + samples[0x15];
+  b1[0x0B] = samples[0x0B] + samples[0x14];
+  b1[0x15] = (samples[0x0A] - samples[0x15]) * costab[0xA];
+  b1[0x14] = (samples[0x0B] - samples[0x14]) * costab[0xB];
+
+  b1[0x0C] = samples[0x0C] + samples[0x13];
+  b1[0x0D] = samples[0x0D] + samples[0x12];
+  b1[0x13] = (samples[0x0C] - samples[0x13]) * costab[0xC];
+  b1[0x12] = (samples[0x0D] - samples[0x12]) * costab[0xD];
+
+  b1[0x0E] = samples[0x0E] + samples[0x11];
+  b1[0x0F] = samples[0x0F] + samples[0x10];
+  b1[0x11] = (samples[0x0E] - samples[0x11]) * costab[0xE];
+  b1[0x10] = (samples[0x0F] - samples[0x10]) * costab[0xF];
+
+  costab = pnts[1];
+
+  b2[0x00] = b1[0x00] + b1[0x0F]; 
+  b2[0x01] = b1[0x01] + b1[0x0E]; 
+  b2[0x0F] = (b1[0x00] - b1[0x0F]) * costab[0];
+  b2[0x0E] = (b1[0x01] - b1[0x0E]) * costab[1];
+
+  b2[0x02] = b1[0x02] + b1[0x0D]; 
+  b2[0x03] = b1[0x03] + b1[0x0C]; 
+  b2[0x0D] = (b1[0x02] - b1[0x0D]) * costab[2];
+  b2[0x0C] = (b1[0x03] - b1[0x0C]) * costab[3];
+
+  b2[0x04] = b1[0x04] + b1[0x0B]; 
+  b2[0x05] = b1[0x05] + b1[0x0A]; 
+  b2[0x0B] = (b1[0x04] - b1[0x0B]) * costab[4];
+  b2[0x0A] = (b1[0x05] - b1[0x0A]) * costab[5];
+
+  b2[0x06] = b1[0x06] + b1[0x09]; 
+  b2[0x07] = b1[0x07] + b1[0x08]; 
+  b2[0x09] = (b1[0x06] - b1[0x09]) * costab[6];
+  b2[0x08] = (b1[0x07] - b1[0x08]) * costab[7];
+
+  /* */
+
+  b2[0x10] = b1[0x10] + b1[0x1F];
+  b2[0x11] = b1[0x11] + b1[0x1E];
+  b2[0x1F] = (b1[0x1F] - b1[0x10]) * costab[0];
+  b2[0x1E] = (b1[0x1E] - b1[0x11]) * costab[1];
+
+  b2[0x12] = b1[0x12] + b1[0x1D];
+  b2[0x13] = b1[0x13] + b1[0x1C];
+  b2[0x1D] = (b1[0x1D] - b1[0x12]) * costab[2];
+  b2[0x1C] = (b1[0x1C] - b1[0x13]) * costab[3];
+
+  b2[0x14] = b1[0x14] + b1[0x1B];
+  b2[0x15] = b1[0x15] + b1[0x1A];
+  b2[0x1B] = (b1[0x1B] - b1[0x14]) * costab[4];
+  b2[0x1A] = (b1[0x1A] - b1[0x15]) * costab[5];
+
+  b2[0x16] = b1[0x16] + b1[0x19];
+  b2[0x17] = b1[0x17] + b1[0x18];
+  b2[0x19] = (b1[0x19] - b1[0x16]) * costab[6];
+  b2[0x18] = (b1[0x18] - b1[0x17]) * costab[7];
+
+   costab = pnts[2];
+
+  b1[0x00] = b2[0x00] + b2[0x07];
+  b1[0x07] = (b2[0x00] - b2[0x07]) * costab[0];
+  b1[0x01] = b2[0x01] + b2[0x06];
+  b1[0x06] = (b2[0x01] - b2[0x06]) * costab[1];
+  b1[0x02] = b2[0x02] + b2[0x05];
+  b1[0x05] = (b2[0x02] - b2[0x05]) * costab[2];
+  b1[0x03] = b2[0x03] + b2[0x04];
+  b1[0x04] = (b2[0x03] - b2[0x04]) * costab[3];
+
+  b1[0x08] = b2[0x08] + b2[0x0F];
+  b1[0x0F] = (b2[0x0F] - b2[0x08]) * costab[0];
+  b1[0x09] = b2[0x09] + b2[0x0E];
+  b1[0x0E] = (b2[0x0E] - b2[0x09]) * costab[1];
+  b1[0x0A] = b2[0x0A] + b2[0x0D];
+  b1[0x0D] = (b2[0x0D] - b2[0x0A]) * costab[2];
+  b1[0x0B] = b2[0x0B] + b2[0x0C];
+  b1[0x0C] = (b2[0x0C] - b2[0x0B]) * costab[3];
+
+  b1[0x10] = b2[0x10] + b2[0x17];
+  b1[0x17] = (b2[0x10] - b2[0x17]) * costab[0];
+  b1[0x11] = b2[0x11] + b2[0x16];
+  b1[0x16] = (b2[0x11] - b2[0x16]) * costab[1];
+  b1[0x12] = b2[0x12] + b2[0x15];
+  b1[0x15] = (b2[0x12] - b2[0x15]) * costab[2];
+  b1[0x13] = b2[0x13] + b2[0x14];
+  b1[0x14] = (b2[0x13] - b2[0x14]) * costab[3];
+
+  b1[0x18] = b2[0x18] + b2[0x1F];
+  b1[0x1F] = (b2[0x1F] - b2[0x18]) * costab[0];
+  b1[0x19] = b2[0x19] + b2[0x1E];
+  b1[0x1E] = (b2[0x1E] - b2[0x19]) * costab[1];
+  b1[0x1A] = b2[0x1A] + b2[0x1D];
+  b1[0x1D] = (b2[0x1D] - b2[0x1A]) * costab[2];
+  b1[0x1B] = b2[0x1B] + b2[0x1C];
+  b1[0x1C] = (b2[0x1C] - b2[0x1B]) * costab[3];
+
+  {
+    register float const cos0 = pnts[3][0];
+    register float const cos1 = pnts[3][1];
+
+    b2[0x00] = b1[0x00] + b1[0x03];
+    b2[0x03] = (b1[0x00] - b1[0x03]) * cos0;
+    b2[0x01] = b1[0x01] + b1[0x02];
+    b2[0x02] = (b1[0x01] - b1[0x02]) * cos1;
+
+    b2[0x04] = b1[0x04] + b1[0x07];
+    b2[0x07] = (b1[0x07] - b1[0x04]) * cos0;
+    b2[0x05] = b1[0x05] + b1[0x06];
+    b2[0x06] = (b1[0x06] - b1[0x05]) * cos1;
+
+    b2[0x08] = b1[0x08] + b1[0x0B];
+    b2[0x0B] = (b1[0x08] - b1[0x0B]) * cos0;
+    b2[0x09] = b1[0x09] + b1[0x0A];
+    b2[0x0A] = (b1[0x09] - b1[0x0A]) * cos1;
+
+    b2[0x0C] = b1[0x0C] + b1[0x0F];
+    b2[0x0F] = (b1[0x0F] - b1[0x0C]) * cos0;
+    b2[0x0D] = b1[0x0D] + b1[0x0E];
+    b2[0x0E] = (b1[0x0E] - b1[0x0D]) * cos1;
+
+    b2[0x10] = b1[0x10] + b1[0x13];
+    b2[0x13] = (b1[0x10] - b1[0x13]) * cos0;
+    b2[0x11] = b1[0x11] + b1[0x12];
+    b2[0x12] = (b1[0x11] - b1[0x12]) * cos1;
+
+    b2[0x14] = b1[0x14] + b1[0x17];
+    b2[0x17] = (b1[0x17] - b1[0x14]) * cos0;
+    b2[0x15] = b1[0x15] + b1[0x16];
+    b2[0x16] = (b1[0x16] - b1[0x15]) * cos1;
+
+    b2[0x18] = b1[0x18] + b1[0x1B];
+    b2[0x1B] = (b1[0x18] - b1[0x1B]) * cos0;
+    b2[0x19] = b1[0x19] + b1[0x1A];
+    b2[0x1A] = (b1[0x19] - b1[0x1A]) * cos1;
+
+    b2[0x1C] = b1[0x1C] + b1[0x1F];
+    b2[0x1F] = (b1[0x1F] - b1[0x1C]) * cos0;
+    b2[0x1D] = b1[0x1D] + b1[0x1E];
+    b2[0x1E] = (b1[0x1E] - b1[0x1D]) * cos1;
+  }
+
+  {
+    register float const cos0 = pnts[4][0];
+
+    b1[0x00] = b2[0x00] + b2[0x01];
+    b1[0x01] = (b2[0x00] - b2[0x01]) * cos0;
+    b1[0x02] = b2[0x02] + b2[0x03];
+    b1[0x03] = (b2[0x03] - b2[0x02]) * cos0;
+    b1[0x02] += b1[0x03];
+
+    b1[0x04] = b2[0x04] + b2[0x05];
+    b1[0x05] = (b2[0x04] - b2[0x05]) * cos0;
+    b1[0x06] = b2[0x06] + b2[0x07];
+    b1[0x07] = (b2[0x07] - b2[0x06]) * cos0;
+    b1[0x06] += b1[0x07];
+    b1[0x04] += b1[0x06];
+    b1[0x06] += b1[0x05];
+    b1[0x05] += b1[0x07];
+
+    b1[0x08] = b2[0x08] + b2[0x09];
+    b1[0x09] = (b2[0x08] - b2[0x09]) * cos0;
+    b1[0x0A] = b2[0x0A] + b2[0x0B];
+    b1[0x0B] = (b2[0x0B] - b2[0x0A]) * cos0;
+    b1[0x0A] += b1[0x0B];
+
+    b1[0x0C] = b2[0x0C] + b2[0x0D];
+    b1[0x0D] = (b2[0x0C] - b2[0x0D]) * cos0;
+    b1[0x0E] = b2[0x0E] + b2[0x0F];
+    b1[0x0F] = (b2[0x0F] - b2[0x0E]) * cos0;
+    b1[0x0E] += b1[0x0F];
+    b1[0x0C] += b1[0x0E];
+    b1[0x0E] += b1[0x0D];
+    b1[0x0D] += b1[0x0F];
+
+    b1[0x10] = b2[0x10] + b2[0x11];
+    b1[0x11] = (b2[0x10] - b2[0x11]) * cos0;
+    b1[0x12] = b2[0x12] + b2[0x13];
+    b1[0x13] = (b2[0x13] - b2[0x12]) * cos0;
+    b1[0x12] += b1[0x13];
+
+    b1[0x14] = b2[0x14] + b2[0x15];
+    b1[0x15] = (b2[0x14] - b2[0x15]) * cos0;
+    b1[0x16] = b2[0x16] + b2[0x17];
+    b1[0x17] = (b2[0x17] - b2[0x16]) * cos0;
+    b1[0x16] += b1[0x17];
+    b1[0x14] += b1[0x16];
+    b1[0x16] += b1[0x15];
+    b1[0x15] += b1[0x17];
+
+    b1[0x18] = b2[0x18] + b2[0x19];
+    b1[0x19] = (b2[0x18] - b2[0x19]) * cos0;
+    b1[0x1A] = b2[0x1A] + b2[0x1B];
+    b1[0x1B] = (b2[0x1B] - b2[0x1A]) * cos0;
+    b1[0x1A] += b1[0x1B];
+
+    b1[0x1C] = b2[0x1C] + b2[0x1D];
+    b1[0x1D] = (b2[0x1C] - b2[0x1D]) * cos0;
+    b1[0x1E] = b2[0x1E] + b2[0x1F];
+    b1[0x1F] = (b2[0x1F] - b2[0x1E]) * cos0;
+    b1[0x1E] += b1[0x1F];
+    b1[0x1C] += b1[0x1E];
+    b1[0x1E] += b1[0x1D];
+    b1[0x1D] += b1[0x1F];
+  }
+
+  out0[0x10*16] = b1[0x00];
+  out0[0x10*12] = b1[0x04];
+  out0[0x10* 8] = b1[0x02];
+  out0[0x10* 4] = b1[0x06];
+  out0[0x10* 0] = b1[0x01];
+  out1[0x10* 0] = b1[0x01];
+  out1[0x10* 4] = b1[0x05];
+  out1[0x10* 8] = b1[0x03];
+  out1[0x10*12] = b1[0x07];
+
+  out0[0x10*14] = b1[0x08] + b1[0x0C];
+  out0[0x10*10] = b1[0x0C] + b1[0x0a];
+  out0[0x10* 6] = b1[0x0A] + b1[0x0E];
+  out0[0x10* 2] = b1[0x0E] + b1[0x09];
+  out1[0x10* 2] = b1[0x09] + b1[0x0D];
+  out1[0x10* 6] = b1[0x0D] + b1[0x0B];
+  out1[0x10*10] = b1[0x0B] + b1[0x0F];
+  out1[0x10*14] = b1[0x0F];
+
+  { 
+    register float tmp;
+    tmp = b1[0x18] + b1[0x1C];
+    out0[0x10*15] = tmp + b1[0x10];
+    out0[0x10*13] = tmp + b1[0x14];
+    tmp = b1[0x1C] + b1[0x1A];
+    out0[0x10*11] = tmp + b1[0x14];
+    out0[0x10* 9] = tmp + b1[0x12];
+    tmp = b1[0x1A] + b1[0x1E];
+    out0[0x10* 7] = tmp + b1[0x12];
+    out0[0x10* 5] = tmp + b1[0x16];
+    tmp = b1[0x1E] + b1[0x19];
+    out0[0x10* 3] = tmp + b1[0x16];
+    out0[0x10* 1] = tmp + b1[0x11];
+    tmp = b1[0x19] + b1[0x1D];
+    out1[0x10* 1] = tmp + b1[0x11];
+    out1[0x10* 3] = tmp + b1[0x15]; 
+    tmp = b1[0x1D] + b1[0x1B];
+    out1[0x10* 5] = tmp + b1[0x15];
+    out1[0x10* 7] = tmp + b1[0x13];
+    tmp = b1[0x1B] + b1[0x1F];
+    out1[0x10* 9] = tmp + b1[0x13];
+    out1[0x10*11] = tmp + b1[0x17];
+    out1[0x10*13] = b1[0x17] + b1[0x1F];
+    out1[0x10*15] = b1[0x1F];
+  }
+  return 0;
+}
+
+/*
+ * the call via dct64 is a trick to force GCC to use
+ * (new) registers for the b1,b2 pointer to the bufs[xx] field
+ */
+int zaudio_decoder_layer_t::
+dct64(float *a, float *b, float *c)
+{
+  float bufs[0x40];
+  return dct64_1(a, b, bufs, bufs + 0x20, c);
+}
+
+/*//////////////////////////////////////////////////////////////// */
+/* */
+/* 9 Point Inverse Discrete Cosine Transform */
+/* */
+/* This piece of code is Copyright 1997 Mikko Tommila and is freely usable */
+/* by anybody. The algorithm itself is of course in the public domain. */
+/* */
+/* Again derived heuristically from the 9-point WFTA. */
+/* */
+/* The algorithm is optimized (?) for speed, not for small rounding errors or */
+/* good readability. */
+/* */
+/* 36 additions, 11 multiplications */
+/* */
+/* Again this is very likely sub-optimal. */
+/* */
+/* The code is optimized to use a minimum number of temporary variables, */
+/* so it should compile quite well even on 8-register Intel x86 processors. */
+/* This makes the code quite obfuscated and very difficult to understand. */
+/* */
+/* References: */
+/* [1] S. Winograd: "On Computing the Discrete Fourier Transform", */
+/*     Mathematics of Computation, Volume 32, Number 141, January 1978, */
+/*     Pages 175-199 */
+
+
+/*------------------------------------------------------------------*/
+/*                                                                  */
+/*    Function: Calculation of the inverse MDCT                     */
+/*                                                                  */
+/*------------------------------------------------------------------*/
+
+int zaudio_decoder_layer_t::
+dct36(float *inbuf, float *o1, float *o2, float *wintab, float *tsbuf)
+{
+  float tmp[18];
+
+  {
+    register float *in = inbuf;
+
+    in[17]+=in[16]; in[16]+=in[15]; in[15]+=in[14];
+    in[14]+=in[13]; in[13]+=in[12]; in[12]+=in[11];
+    in[11]+=in[10]; in[10]+=in[9];  in[9] +=in[8];
+    in[8] +=in[7];  in[7] +=in[6];  in[6] +=in[5];
+    in[5] +=in[4];  in[4] +=in[3];  in[3] +=in[2];
+    in[2] +=in[1];  in[1] +=in[0];
+
+    in[17]+=in[15]; in[15]+=in[13]; in[13]+=in[11]; in[11]+=in[9];
+    in[9] +=in[7];  in[7] +=in[5];  in[5] +=in[3];  in[3] +=in[1];
+
+
+    {
+      float t3;
+      { 
+        float t0 = COS6_2 * (in[8] + in[16] - in[4]);
+        float t1 = COS6_2 * in[12];
+        float t2 = (t3 = in[0]) - t1 - t1;
+        tmp[1] = tmp[7] = t2 - t0;
+        tmp[4] = t2 + t0 + t0;
+        t2 = COS6_1 * (in[10] + in[14] - in[2]);
+        t3 += t1;
+        tmp[1] -= t2;
+        tmp[7] += t2;
+      }
+      {
+        float t0 = cos9[0] * (in[4] + in[8] );
+        float t1 = cos9[1] * (in[8] - in[16]);
+        float t2 = cos9[2] * (in[4] + in[16]);
+        tmp[2] = tmp[6] = t3 - t0      - t2;
+        tmp[0] = tmp[8] = t3 + t0 + t1;
+        tmp[3] = tmp[5] = t3 - t1 + t2;
+      }
+    }
+    {
+      float t1 = cos18[0] * (in[2]  + in[10]);
+      float t2 = cos18[1] * (in[10] - in[14]);
+      float t3 = COS6_1   * in[6];
+      {
+        float t0 = t1 + t2 + t3;
+        tmp[0] += t0;
+        tmp[8] -= t0;
+      }
+
+      t1 -= t3;
+      t2 -= t3;
+      t3 = cos18[2] * (in[2] + in[14]);
+
+      t1 += t3;
+      tmp[3] += t1;
+      tmp[5] -= t1;
+
+      t2 -= t3;
+      tmp[2] += t2;
+      tmp[6] -= t2;
+    }
+
+    {
+      float t1 = COS6_2 * in[13];
+      float t2 = COS6_2 * (in[9] + in[17] - in[5]);
+      float t3 = in[1] + t1;
+      float t4 = in[1] - t1 - t1;
+      float t5 = t4 - t2;
+      float t0 = cos9[0] * (in[5] + in[9]);
+      t1 = cos9[1] * (in[9] - in[17]);
+      tmp[13] = (t4 + t2 + t2) * tfcos36[17-13];
+      t2 = cos9[2] * (in[5] + in[17]);
+      float t6 = t3 - t0 - t2;
+      t0 += t3 + t1;
+      t3 += t2 - t1;
+      t2 = cos18[0] * (in[3]  + in[11]);
+      t4 = cos18[1] * (in[11] - in[15]);
+      float t7 = COS6_1 * in[7];
+
+      t1 = t2 + t4 + t7;
+      tmp[17] = (t0 + t1) * tfcos36[17-17];
+      tmp[9]  = (t0 - t1) * tfcos36[17-9];
+      t1 = cos18[2] * (in[3] + in[15]);
+      t2 += t1 - t7;
+
+      tmp[14] = (t3 + t2) * tfcos36[17-14];
+      t0 = COS6_1 * (in[11] + in[15] - in[3]);
+      tmp[12] = (t3 - t2) * tfcos36[17-12];
+
+      t4 -= t1 + t7;
+
+      tmp[16] = (t5 - t0) * tfcos36[17-16];
+      tmp[10] = (t5 + t0) * tfcos36[17-10];
+      tmp[15] = (t6 + t4) * tfcos36[17-15];
+      tmp[11] = (t6 - t4) * tfcos36[17-11];
+    }
+#define MACRO(v) { float tmpval; \
+  tmpval = tmp[(v)] + tmp[17-(v)]; \
+  out2[9+(v)] = tmpval * w[27+(v)]; \
+  out2[8-(v)] = tmpval * w[26-(v)]; \
+  tmpval = tmp[(v)] - tmp[17-(v)]; \
+  ts[SBLIMIT*(8-(v))] = out1[8-(v)] + tmpval * w[8-(v)]; \
+  ts[SBLIMIT*(9+(v))] = out1[9+(v)] + tmpval * w[9+(v)]; \
+  }
+    {
+      register float *out2 = o2;
+      register float *w = wintab;
+      register float *out1 = o1;
+      register float *ts = tsbuf;
+
+      MACRO(0);
+      MACRO(1);
+      MACRO(2);
+      MACRO(3);
+      MACRO(4);
+      MACRO(5);
+      MACRO(6);
+      MACRO(7);
+      MACRO(8);
+    }
+  }
+  return 0;
+}
+
+/*
+ * new DCT12
+ */
+int zaudio_decoder_layer_t::
+dct12(float *in,float *rawout1,float *rawout2,register float *wi,register float *ts)
+{
+#define DCT12_PART1 \
+  in5 = in[5*3]; \
+  in5 += (in4 = in[4*3]); \
+  in4 += (in3 = in[3*3]); \
+  in3 += (in2 = in[2*3]); \
+  in2 += (in1 = in[1*3]); \
+  in1 += (in0 = in[0*3]); \
+  in5 += in3; in3 += in1; \
+  in2 *= COS6_1; \
+  in3 *= COS6_1; \
+
+#define DCT12_PART2 \
+  in0 += in4 * COS6_2; \
+  in4 = in0 + in2;  \
+  in0 -= in2;       \
+  in1 += in5 * COS6_2; \
+  in5 = (in1 + in3) * tfcos12[0]; \
+  in1 = (in1 - in3) * tfcos12[2]; \
+  in3 = in4 + in5;  \
+  in4 -= in5;       \
+  in2 = in0 + in1;  \
+  in0 -= in1;
+
+  {
+    float in0,in1,in2,in3,in4,in5;
+    register float *out1 = rawout1;
+    ts[SBLIMIT*0] = out1[0]; ts[SBLIMIT*1] = out1[1]; ts[SBLIMIT*2] = out1[2];
+    ts[SBLIMIT*3] = out1[3]; ts[SBLIMIT*4] = out1[4]; ts[SBLIMIT*5] = out1[5];
+
+    DCT12_PART1
+    {
+      float tmp0,tmp1 = (in0 - in4);
+      {
+        float tmp2 = (in1 - in5) * tfcos12[1];
+        tmp0 = tmp1 + tmp2;
+        tmp1 -= tmp2;
+      }
+      ts[(17-1)*SBLIMIT] = out1[17-1] + tmp0 * wi[11-1];
+      ts[(12+1)*SBLIMIT] = out1[12+1] + tmp0 * wi[6+1];
+      ts[(6 +1)*SBLIMIT] = out1[6 +1] + tmp1 * wi[1];
+      ts[(11-1)*SBLIMIT] = out1[11-1] + tmp1 * wi[5-1];
+    }
+
+    DCT12_PART2
+
+    ts[(17-0)*SBLIMIT] = out1[17-0] + in2 * wi[11-0];
+    ts[(12+0)*SBLIMIT] = out1[12+0] + in2 * wi[6+0];
+    ts[(12+2)*SBLIMIT] = out1[12+2] + in3 * wi[6+2];
+    ts[(17-2)*SBLIMIT] = out1[17-2] + in3 * wi[11-2];
+
+    ts[(6+0)*SBLIMIT]  = out1[6+0] + in0 * wi[0];
+    ts[(11-0)*SBLIMIT] = out1[11-0] + in0 * wi[5-0];
+    ts[(6+2)*SBLIMIT]  = out1[6+2] + in4 * wi[2];
+    ts[(11-2)*SBLIMIT] = out1[11-2] + in4 * wi[5-2];
+  }
+
+  in++;
+
+  {
+    float in0,in1,in2,in3,in4,in5;
+    register float *out2 = rawout2;
+
+    DCT12_PART1
+
+    {
+      float tmp0,tmp1 = (in0 - in4);
+      {
+        float tmp2 = (in1 - in5) * tfcos12[1];
+        tmp0 = tmp1 + tmp2;
+        tmp1 -= tmp2;
+      }
+      out2[5-1] = tmp0 * wi[11-1];
+      out2[0+1] = tmp0 * wi[6+1];
+      ts[(12+1)*SBLIMIT] += tmp1 * wi[1];
+      ts[(17-1)*SBLIMIT] += tmp1 * wi[5-1];
+    }
+
+    DCT12_PART2
+
+    out2[5-0] = in2 * wi[11-0];
+    out2[0+0] = in2 * wi[6+0];
+    out2[0+2] = in3 * wi[6+2];
+    out2[5-2] = in3 * wi[11-2];
+
+    ts[(12+0)*SBLIMIT] += in0 * wi[0];
+    ts[(17-0)*SBLIMIT] += in0 * wi[5-0];
+    ts[(12+2)*SBLIMIT] += in4 * wi[2];
+    ts[(17-2)*SBLIMIT] += in4 * wi[5-2];
+  }
+
+  in++; 
+
+  {
+    float in0,in1,in2,in3,in4,in5;
+    register float *out2 = rawout2;
+    out2[12]=out2[13]=out2[14]=out2[15]=out2[16]=out2[17]=0.0;
+
+    DCT12_PART1
+
+    {
+      float tmp0,tmp1 = (in0 - in4);
+      {
+        float tmp2 = (in1 - in5) * tfcos12[1];
+        tmp0 = tmp1 + tmp2;
+        tmp1 -= tmp2;
+      }
+      out2[11-1] = tmp0 * wi[11-1];
+      out2[6 +1] = tmp0 * wi[6+1];
+      out2[0+1] += tmp1 * wi[1];
+      out2[5-1] += tmp1 * wi[5-1];
+    }
+
+    DCT12_PART2
+
+    out2[11-0] = in2 * wi[11-0];
+    out2[6 +0] = in2 * wi[6+0];
+    out2[6 +2] = in3 * wi[6+2];
+    out2[11-2] = in3 * wi[11-2];
+
+    out2[0+0] += in0 * wi[0];
+    out2[5-0] += in0 * wi[5-0];
+    out2[0+2] += in4 * wi[2];
+    out2[5-2] += in4 * wi[5-2];
+  }
+
+  return 0;
+}
+