Finalization of the first version of EchoCanceller 3

webrtc/modules/audio_processing/aec3/aec3_common.h

Index: webrtc/modules/audio_processing/aec3/aec3_common.h
diff --git a/webrtc/modules/audio_processing/aec3/aec3_constants.h b/webrtc/modules/audio_processing/aec3/aec3_common.h
similarity index 80%
rename from webrtc/modules/audio_processing/aec3/aec3_constants.h
rename to webrtc/modules/audio_processing/aec3/aec3_common.h
index 054b0d8afd8fcf0086bac867c67f2aa1cef8dc42..3a5e835e21d3b782fe2eb971ea7a7b8f1bda93f2 100644
--- a/webrtc/modules/audio_processing/aec3/aec3_constants.h
+++ b/webrtc/modules/audio_processing/aec3/aec3_common.h
@@ -8,15 +8,27 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_AEC3_CONSTANTS_H_
-#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_AEC3_CONSTANTS_H_
+#ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_AEC3_COMMON_H_
+#define WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_AEC3_COMMON_H_
 
 #include <stddef.h>
+#include "webrtc/typedefs.h"
 
 namespace webrtc {
 
+#ifdef _MSC_VER /* visual c++ */
+#define ALIGN16_BEG __declspec(align(16))
+#define ALIGN16_END
+#else /* gcc or icc */
+#define ALIGN16_BEG
+#define ALIGN16_END __attribute__((aligned(16)))
+#endif
+
+enum class Aec3Optimization { kNone, kSse2 };
+
 constexpr size_t kFftLengthBy2 = 64;
 constexpr size_t kFftLengthBy2Plus1 = kFftLengthBy2 + 1;
+constexpr size_t kFftLengthBy2Minus1 = kFftLengthBy2 - 1;
 constexpr size_t kFftLength = 2 * kFftLengthBy2;
 
 constexpr size_t kMaxNumBands = 3;
@@ -39,6 +51,9 @@ constexpr bool ValidFullBandRate(int sample_rate_hz) {
          sample_rate_hz == 32000 || sample_rate_hz == 48000;
 }
 
+// Detects what kind of optimizations to use for the code.
+Aec3Optimization DetectOptimization();
+
 static_assert(1 == NumBandsForRate(8000), "Number of bands for 8 kHz");
 static_assert(1 == NumBandsForRate(16000), "Number of bands for 16 kHz");
 static_assert(2 == NumBandsForRate(32000), "Number of bands for 32 kHz");
@@ -65,4 +80,4 @@ static_assert(!ValidFullBandRate(8001),
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_AEC3_CONSTANTS_H_
+#endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC3_AEC3_COMMON_H_