Use passthrough decoder for (E)AC3 formats

media/mojo/common/media_type_converters.cc

 // Copyright 2014 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.
 
 #include "media/mojo/common/media_type_converters.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/memory/ptr_util.h"
@@ skipping 293 matching lines @@
   return buffer;
 }
 
 // static
 scoped_refptr<media::AudioBuffer>
 TypeConverter<scoped_refptr<media::AudioBuffer>, media::mojom::AudioBufferPtr>::
     Convert(const media::mojom::AudioBufferPtr& input) {
   if (input->end_of_stream)
     return media::AudioBuffer::CreateEOSBuffer();
 
+  if (input->frame_count <= 0 ||
+      static_cast<size_t>(input->sample_format) > media::kSampleFormatMax ||
+      static_cast<size_t>(input->channel_layout) > media::CHANNEL_LAYOUT_MAX ||
+      ChannelLayoutToChannelCount(input->channel_layout) !=
+          input->channel_count) {
+    LOG(ERROR) << "Receive an invalid audio buffer, replace it with EOS.";
+    return media::AudioBuffer::CreateEOSBuffer();
+  }
+
+  if (IsBitstream(input->sample_format)) {
+    uint8_t* data = input->data.data();
+    return media::AudioBuffer::CopyBitstreamFrom(
+        input->sample_format, input->channel_layout, input->channel_count,
+        input->sample_rate, input->frame_count, &data, input->data.size(),
+        input->timestamp);
+  }
+
   // Setup channel pointers.  AudioBuffer::CopyFrom() will only use the first
   // one in the case of interleaved data.
   std::vector<const uint8_t*> channel_ptrs(input->channel_count, nullptr);
   const size_t size_per_channel = input->data.size() / input->channel_count;
   DCHECK_EQ(0u, input->data.size() % input->channel_count);
   for (int i = 0; i < input->channel_count; ++i)
     channel_ptrs[i] = input->data.data() + i * size_per_channel;
 
   return media::AudioBuffer::CopyFrom(
       input->sample_format, input->channel_layout, input->channel_count,
@@ skipping 60 matching lines @@
       input->format, input->coded_size, input->visible_rect,
       input->natural_size, std::move(data->frame_data),
       base::saturated_cast<size_t>(data->frame_data_size),
       base::saturated_cast<size_t>(data->y_offset),
       base::saturated_cast<size_t>(data->u_offset),
       base::saturated_cast<size_t>(data->v_offset), data->y_stride,
       data->u_stride, data->v_stride, input->timestamp);
 }
 
 }  // namespace mojo