Support (E)AC3 passthrough

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 25 matching lines @@
   double volume;
   uint32_t size;
   uint32_t hardware_delay_bytes;
   uint32_t id;
   bool key_pressed;
 };
 struct MEDIA_EXPORT ALIGNAS(PARAMETERS_ALIGNMENT) AudioOutputBufferParameters {
   uint32_t frames_skipped;
   int64_t delay;
   int64_t delay_timestamp;
+  uint32_t frames;
+  uint32_t data_size;
 };
 #undef PARAMETERS_ALIGNMENT
 #if defined(OS_WIN)
 #pragma warning(pop)
 #endif
 
 static_assert(sizeof(AudioInputBufferParameters) %
                       AudioBus::kChannelAlignment ==
                   0,
               "AudioInputBufferParameters not aligned");
@@ skipping 174 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_