Experiment with AVX optimizations for FMAC, FMUL operations.

media/base/audio_parameters.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_BASE_AUDIO_PARAMETERS_H_
 #define MEDIA_BASE_AUDIO_PARAMETERS_H_
 
 #include <stdint.h>
 #include <string>
 
@@ skipping 11 matching lines @@
 // Use a struct-in-struct approach to ensure that we can calculate the required
 // size as sizeof(Audio{Input,Output}BufferParameters) + #(bytes in audio
 // buffer) without using packing. Also align Audio{Input,Output}BufferParameters
 // instead of in Audio{Input,Output}Buffer to be able to calculate size like so.
 // Use a macro for the alignment value that's the same as
 // AudioBus::kChannelAlignment, since MSVC doesn't accept the latter to be used.
 #if defined(OS_WIN)
 #pragma warning(push)
 #pragma warning(disable : 4324)  // Disable warning for added padding.
 #endif
-#define PARAMETERS_ALIGNMENT 16
+#define PARAMETERS_ALIGNMENT 32
 static_assert(AudioBus::kChannelAlignment == PARAMETERS_ALIGNMENT,
               "Audio buffer parameters struct alignment not same as AudioBus");
 struct MEDIA_EXPORT ALIGNAS(PARAMETERS_ALIGNMENT) AudioInputBufferParameters {
   double volume;
   uint32_t size;
   uint32_t hardware_delay_bytes;
   uint32_t id;
   bool key_pressed;
 };
 struct MEDIA_EXPORT ALIGNAS(PARAMETERS_ALIGNMENT) AudioOutputBufferParameters {
@@ skipping 187 matching lines @@
   if (a.sample_rate() != b.sample_rate())
     return a.sample_rate() < b.sample_rate();
   if (a.bits_per_sample() != b.bits_per_sample())
     return a.bits_per_sample() < b.bits_per_sample();
   return a.frames_per_buffer() < b.frames_per_buffer();
 }
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_PARAMETERS_H_