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

webrtc/modules/audio_processing/audio_processing.gypi

 # Copyright (c) 2012 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.
 
 {
   'variables': {
@@ skipping 16 matching lines @@
         '<(webrtc_root)/base/base.gyp:rtc_base_approved',
         '<(webrtc_root)/common.gyp:webrtc_common',
         '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
         '<(webrtc_root)/modules/modules.gyp:isac',
         '<(webrtc_root)/system_wrappers/system_wrappers.gyp:system_wrappers',
       ],
       'sources': [
         'aec/aec_core.cc',
         'aec/aec_core.h',
         'aec/aec_core_optimized_methods.h',
-        'aec/aec_rdft.cc',
-        'aec/aec_rdft.h',
         'aec/aec_resampler.cc',
         'aec/aec_resampler.h',
         'aec/echo_cancellation.cc',
         'aec/echo_cancellation.h',
         'aecm/aecm_core.cc',
         'aecm/aecm_core.h',
         'aecm/echo_control_mobile.cc',
         'aecm/echo_control_mobile.h',
         'agc/agc.cc',
         'agc/agc.h',
@@ skipping 85 matching lines @@
         'transient/wpd_tree.h',
         'typing_detection.cc',
         'typing_detection.h',
         'utility/block_mean_calculator.cc',
         'utility/block_mean_calculator.h',
         'utility/delay_estimator.cc',
         'utility/delay_estimator.h',
         'utility/delay_estimator_internal.h',
         'utility/delay_estimator_wrapper.cc',
         'utility/delay_estimator_wrapper.h',
+        'utility/ooura_fft.cc',
+        'utility/ooura_fft.h',
+        'utility/ooura_fft_tables_common.h',
         'vad/common.h',
         'vad/gmm.cc',
         'vad/gmm.h',
         'vad/noise_gmm_tables.h',
         'vad/pitch_based_vad.cc',
         'vad/pitch_based_vad.h',
         'vad/pitch_internal.cc',
         'vad/pitch_internal.h',
         'vad/pole_zero_filter.cc',
         'vad/pole_zero_filter.h',
@@ skipping 75 matching lines @@
           'dependencies': ['audio_processing_neon',],
         }],
         ['target_arch=="mipsel" and mips_arch_variant!="r6"', {
           'sources': [
             'aecm/aecm_core_mips.cc',
           ],
           'conditions': [
             ['mips_float_abi=="hard"', {
               'sources': [
                 'aec/aec_core_mips.cc',
-                'aec/aec_rdft_mips.cc',
+                'utility/ooura_fft_mips.cc',
               ],
             }],
           ],
         }, {
           'sources': [
             'aecm/aecm_core_c.cc',
           ],
         }],
       ],
       # TODO(jschuh): Bug 1348: fix size_t to int truncations.
@@ skipping 18 matching lines @@
         },
       ],
     }],
     ['target_arch=="ia32" or target_arch=="x64"', {
       'targets': [
         {
           'target_name': 'audio_processing_sse2',
           'type': 'static_library',
           'sources': [
             'aec/aec_core_sse2.cc',
-            'aec/aec_rdft_sse2.cc',
+            'utility/ooura_fft_sse2.cc',
+            'utility/ooura_fft_tables_neon_sse2.h',
           ],
           'conditions': [
             ['apm_debug_dump==1', {
               'defines': ['WEBRTC_APM_DEBUG_DUMP=1',],
             }, {
               'defines': ['WEBRTC_APM_DEBUG_DUMP=0',],
             }],
             ['os_posix==1', {
               'cflags': [ '-msse2', ],
               'xcode_settings': {
                 'OTHER_CFLAGS': [ '-msse2', ],
               },
             }],
           ],
         },
       ],
     }],
     ['build_with_neon==1', {
       'targets': [{
         'target_name': 'audio_processing_neon',
         'type': 'static_library',
         'includes': ['../../build/arm_neon.gypi',],
         'dependencies': [
           '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
         ],
         'sources': [
           'aec/aec_core_neon.cc',
-          'aec/aec_rdft_neon.cc',
           'aecm/aecm_core_neon.cc',
           'ns/nsx_core_neon.c',
+          'utility/ooura_fft_neon.cc',
+          'utility/ooura_fft_tables_neon_sse2.h',
         ],
         'conditions': [
           ['apm_debug_dump==1', {
             'defines': ['WEBRTC_APM_DEBUG_DUMP=1',],
           }],
           ['apm_debug_dump==0', {
             'defines': ['WEBRTC_APM_DEBUG_DUMP=0',],
           }],
         ],
       }],
     }],
   ],
 }