Support (E)AC3 passthrough

media/base/audio_bus.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_BUS_H_
 #define MEDIA_BASE_AUDIO_BUS_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 51 matching lines @@
   // Uses channels() and frames_per_buffer() from AudioParameters if given.
   static int CalculateMemorySize(int channels, int frames);
   static int CalculateMemorySize(const AudioParameters& params);
 
   // Methods that are expected to be called after AudioBus::CreateWrapper() in
   // order to wrap externally allocated memory. Note: It is illegal to call
   // these methods when using a factory method other than CreateWrapper().
   void SetChannelData(int channel, float* data);
   void set_frames(int frames);
 
+  int data_size() const { return data_size_; }

[DaleCurtis, 2017/06/15 21:46:32]

this should be GetBitstreamDataSize() and DCHECK(is_bitstream_format_); ditto
for SetBitstreamDataSize();

[AndyWu, 2017/08/02 01:43:40]

Done.

+  void set_data_size(int data_size) { data_size_ = data_size; }
+
+  int is_bitstream_format() const { return is_bitstream_format_; }
+  void set_is_bitstream_format(bool is_bitstream_format) {
+    is_bitstream_format_ = is_bitstream_format;
+  }
+
   // Overwrites the sample values stored in this AudioBus instance with values
   // from a given interleaved |source_buffer| with expected layout
   // [ch0, ch1, ..., chN, ch0, ch1, ...] and sample values in the format
   // corresponding to the given SourceSampleTypeTraits.
   // The sample values are converted to float values by means of the method
   // convert_to_float32() provided by the SourceSampleTypeTraits. For a list of
   // ready-to-use SampleTypeTraits, see file audio_sample_types.h.
   // If |num_frames_to_write| is less than frames(), the remaining frames are
   // zeroed out. If |num_frames_to_write| is more than frames(), this results in
   // undefined behavior.
@@ skipping 117 matching lines @@
 
   template <class TargetSampleTypeTraits>
   static void CopyConvertFromAudioBusToInterleavedTarget(
       const AudioBus* source,
       int read_offset_in_frames,
       int num_frames_to_read,
       typename TargetSampleTypeTraits::ValueType* dest_buffer);
 
   // Contiguous block of channel memory.
   std::unique_ptr<float, base::AlignedFreeDeleter> data_;
+  int data_size_;
+  bool is_bitstream_format_;
 
   // One float pointer per channel pointing to a contiguous block of memory for
   // that channel. If the memory is owned by this instance, this will
   // point to the memory in |data_|. Otherwise, it may point to memory provided
   // by the client.
   std::vector<float*> channel_data_;
   int frames_;
 
   // Protect SetChannelData() and set_frames() for use by CreateWrapper().
   bool can_set_channel_data_;
@@ skipping 80 matching lines @@
       float sourceSampleValue = channel_data[source_frame_index];
       dest_buffer[write_pos_in_dest] =
           TargetSampleTypeTraits::FromFloat(sourceSampleValue);
     }
   }
 }
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_AUDIO_BUS_H_