Check buffer index in shared memory for input audio.

media/audio/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_AUDIO_AUDIO_PARAMETERS_H_
 #define MEDIA_AUDIO_AUDIO_PARAMETERS_H_
 
+#include <stdint.h>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/time/time.h"
 #include "media/base/channel_layout.h"
 #include "media/base/media_export.h"
 
 namespace media {
 
 struct MEDIA_EXPORT AudioInputBufferParameters {

[tommi (sloooow) - chröme, 2015/08/14 09:56:21]

use #pragma pack if explicit packing is always necessary

[Henrik Grunell, 2015/08/14 12:38:32]

As discussed offline, that doesn't work (for gcc at least) since it specifies
maximum alignment. Using to ALIGNAS(), thanks for the tip.

   double volume;
   uint32 size;
+  uint32_t hardware_delay_bytes;
+  uint32_t id;
   bool key_pressed;
+  uint8_t pad8[3];

[DaleCurtis, 2015/08/13 22:00:49]

?

+  uint64_t pad64;
 };
 
 // Use a struct-in-struct approach to ensure that we can calculate the required
 // size as sizeof(AudioInputBufferParameters) + #(bytes in audio buffer) without
 // using packing.
 struct MEDIA_EXPORT AudioInputBuffer {
   AudioInputBufferParameters params;
   int8 audio[1];
 };
 
@@ skipping 95 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_AUDIO_AUDIO_PARAMETERS_H_