Move the aec_rdft* files to a more proper place beneath APM and make them thread-safe.

webrtc/modules/audio_processing/utility/ooura_fft_mips.cc

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include "webrtc/modules/audio_processing/aec/aec_rdft.h"
+#include "webrtc/modules/audio_processing/utility/ooura_fft.h"
+
+#include "webrtc/modules/audio_processing/utility/ooura_fft_tables_common.h"
 #include "webrtc/typedefs.h"
 
-static void bitrv2_128_mips(float* a) {
+namespace webrtc {
+
+#if defined(MIPS_FPU_LE)
+void bitrv2_128_mips(float* a) {
   // n is 128
   float xr, xi, yr, yi;
 
   xr = a[8];
   xi = a[9];
   yr = a[16];
   yi = a[17];
   a[8] = yr;
   a[9] = yi;
   a[16] = xr;
@@ skipping 236 matching lines @@
   xr = a[110];
   xi = a[111];
   yr = a[118];
   yi = a[119];
   a[110] = yr;
   a[111] = yi;
   a[118] = xr;
   a[119] = xi;
 }
 
-static void cft1st_128_mips(float* a) {
+void cft1st_128_mips(float* a) {
   float f0, f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14;
   int a_ptr, p1_rdft, p2_rdft, count;
   const float* first = rdft_wk3ri_first;
   const float* second = rdft_wk3ri_second;
 
   __asm __volatile (
     ".set       push                                                    \n\t"
     ".set       noreorder                                               \n\t"
     // first 8
     "lwc1       %[f0],        0(%[a])                                   \n\t"
@@ skipping 228 matching lines @@
       [f4] "=&f" (f4), [f5] "=&f" (f5), [f6] "=&f" (f6), [f7] "=&f" (f7),
       [f8] "=&f" (f8), [f9] "=&f" (f9), [f10] "=&f" (f10), [f11] "=&f" (f11),
       [f12] "=&f" (f12), [f13] "=&f" (f13), [f14] "=&f" (f14),
       [a_ptr] "=&r" (a_ptr), [p1_rdft] "=&r" (p1_rdft), [first] "+r" (first),
       [p2_rdft] "=&r" (p2_rdft), [count] "=&r" (count), [second] "+r" (second)
     : [a] "r" (a), [rdft_w] "r" (rdft_w)
     : "memory"
   );
 }
 
-static void cftmdl_128_mips(float* a) {
+void cftmdl_128_mips(float* a) {
   float f0, f1, f2, f3, f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14;
   int tmp_a, count;
   __asm __volatile (
     ".set       push                                      \n\t"
     ".set       noreorder                                 \n\t"
     "addiu      %[tmp_a],   %[a],         0               \n\t"
     "addiu      %[count],   $zero,        4               \n\t"
    "1:                                                    \n\t"
     "addiu      %[count],   %[count],     -1              \n\t"
     "lwc1       %[f0],      0(%[tmp_a])                   \n\t"
@@ skipping 265 matching lines @@
     ".set       pop                                                        \n\t"
     : [f0] "=&f" (f0), [f1] "=&f" (f1), [f2] "=&f" (f2), [f3] "=&f" (f3),
       [f4] "=&f" (f4), [f5] "=&f" (f5), [f6] "=&f" (f6), [f7] "=&f" (f7),
       [f8] "=&f" (f8), [tmp_a] "=&r" (tmp_a), [count] "=&r" (count)
     : [a] "r" (a), [f9] "f" (f9), [f10] "f" (f10), [f11] "f" (f11),
       [f12] "f" (f12), [f13] "f" (f13), [f14] "f" (f14)
     : "memory"
   );
 }
 
-static void cftfsub_128_mips(float* a) {
+void cftfsub_128_mips(float* a) {
   float f0, f1, f2, f3, f4, f5, f6, f7, f8;
   int tmp_a, count;
 
-  cft1st_128(a);
-  cftmdl_128(a);
+  cft1st_128_mips(a);
+  cftmdl_128_mips(a);
 
   __asm __volatile (
     ".set       push                                      \n\t"
     ".set       noreorder                                 \n\t"
     "addiu      %[tmp_a],       %[a],         0           \n\t"
     "addiu      %[count],       $zero,        16          \n\t"
    "1:                                                    \n\t"
     "addiu      %[count],       %[count],     -1          \n\t"
     "lwc1       %[f0],          0(%[tmp_a])               \n\t"
     "lwc1       %[f2],          128(%[tmp_a])             \n\t"
@@ skipping 32 matching lines @@
     ".set       pop                                       \n\t"
     : [f0] "=&f" (f0), [f1] "=&f" (f1), [f2] "=&f" (f2), [f3] "=&f" (f3),
       [f4] "=&f" (f4), [f5] "=&f" (f5), [f6] "=&f" (f6), [f7] "=&f" (f7),
       [f8] "=&f" (f8), [tmp_a] "=&r" (tmp_a),
       [count] "=&r" (count)
     : [a] "r" (a)
     : "memory"
   );
 }
 
-static void cftbsub_128_mips(float* a) {
+void cftbsub_128_mips(float* a) {
   float f0, f1, f2, f3, f4, f5, f6, f7, f8;
   int tmp_a, count;
 
-  cft1st_128(a);
-  cftmdl_128(a);
+  cft1st_128_mips(a);
+  cftmdl_128_mips(a);
 
   __asm __volatile (
     ".set       push                                        \n\t"
     ".set       noreorder                                   \n\t"
     "addiu      %[tmp_a],   %[a],           0               \n\t"
     "addiu      %[count],   $zero,          16              \n\t"
    "1:                                                      \n\t"
     "addiu      %[count],   %[count],       -1              \n\t"
     "lwc1       %[f0],      0(%[tmp_a])                     \n\t"
     "lwc1       %[f2],      128(%[tmp_a])                   \n\t"
@@ skipping 32 matching lines @@
     " addiu     %[tmp_a],   %[tmp_a],       8               \n\t"
     ".set       pop                                         \n\t"
     : [f0] "=&f" (f0), [f1] "=&f" (f1), [f2] "=&f" (f2), [f3] "=&f" (f3),
       [f4] "=&f" (f4), [f5] "=&f" (f5), [f6] "=&f" (f6), [f7] "=&f" (f7),
       [f8] "=&f" (f8), [tmp_a] "=&r" (tmp_a), [count] "=&r" (count)
     : [a] "r" (a)
     : "memory"
   );
 }
 
-static void rftfsub_128_mips(float* a) {
+void rftfsub_128_mips(float* a) {
   const float* c = rdft_w + 32;
   const float f0 = 0.5f;
   float* a1 = &a[2];
   float* a2 = &a[126];
   const float* c1 = &c[1];
   const float* c2 = &c[31];
   float f1, f2, f3 ,f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14, f15;
   int count;
 
   __asm __volatile (
@@ skipping 106 matching lines @@
       [f1] "=&f" (f1), [f2] "=&f" (f2), [f3] "=&f" (f3), [f4] "=&f" (f4),
       [f5] "=&f" (f5), [f6] "=&f" (f6), [f7] "=&f" (f7), [f8] "=&f" (f8),
       [f9] "=&f" (f9), [f10] "=&f" (f10), [f11] "=&f" (f11), [f12] "=&f" (f12),
       [f13] "=&f" (f13), [f14] "=&f" (f14), [f15] "=&f" (f15),
       [count] "=&r" (count)
     : [f0] "f" (f0)
     : "memory"
   );
 }
 
-static void rftbsub_128_mips(float* a) {
+void rftbsub_128_mips(float* a) {
   const float *c = rdft_w + 32;
   const float f0 = 0.5f;
   float* a1 = &a[2];
   float* a2 = &a[126];
   const float* c1 = &c[1];
   const float* c2 = &c[31];
   float f1, f2, f3 ,f4, f5, f6, f7, f8, f9, f10, f11, f12, f13, f14, f15;
   int count;
 
   a[1] = -a[1];
@@ skipping 108 matching lines @@
     : [a1] "+r" (a1), [a2] "+r" (a2), [c1] "+r" (c1), [c2] "+r" (c2),
       [f1] "=&f" (f1), [f2] "=&f" (f2), [f3] "=&f" (f3), [f4] "=&f" (f4),
       [f5] "=&f" (f5), [f6] "=&f" (f6), [f7] "=&f" (f7), [f8] "=&f" (f8),
       [f9] "=&f" (f9), [f10] "=&f" (f10), [f11] "=&f" (f11), [f12] "=&f" (f12),
       [f13] "=&f" (f13), [f14] "=&f" (f14), [f15] "=&f" (f15),
       [count] "=&r" (count)
     : [f0] "f" (f0)
     : "memory"
   );
 }
+#endif
 
-void aec_rdft_init_mips(void) {
-  cft1st_128 = cft1st_128_mips;
-  cftmdl_128 = cftmdl_128_mips;
-  rftfsub_128 = rftfsub_128_mips;
-  rftbsub_128 = rftbsub_128_mips;
-  cftfsub_128 = cftfsub_128_mips;
-  cftbsub_128 = cftbsub_128_mips;
-  bitrv2_128 = bitrv2_128_mips;
-}
+}  // namespace webrtc