media config: expand is_encrypted to a struct.

chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.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 "chromecast/media/cma/ipc_streamer/audio_decoder_config_marshaller.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "chromecast/media/cma/ipc/media_message.h"
+#include "chromecast/media/cma/ipc_streamer/encryption_scheme_marshaller.h"
 #include "media/base/audio_decoder_config.h"
 
 namespace chromecast {
 namespace media {
 
 namespace {
 const size_t kMaxExtraDataSize = 16 * 1024;
 }
 
 // static
 void AudioDecoderConfigMarshaller::Write(
     const ::media::AudioDecoderConfig& config, MediaMessage* msg) {
   CHECK(msg->WritePod(config.codec()));
   CHECK(msg->WritePod(config.channel_layout()));
   CHECK(msg->WritePod(config.samples_per_second()));
   CHECK(msg->WritePod(config.sample_format()));
-  CHECK(msg->WritePod(config.is_encrypted()));
+  EncryptionSchemeMarshaller::Write(config.encryption_scheme(), msg);
   CHECK(msg->WritePod(config.extra_data().size()));
   if (!config.extra_data().empty())
     CHECK(msg->WriteBuffer(&config.extra_data()[0],
                            config.extra_data().size()));
 }
 
 // static
 ::media::AudioDecoderConfig AudioDecoderConfigMarshaller::Read(
     MediaMessage* msg) {
   ::media::AudioCodec codec;
   ::media::SampleFormat sample_format;
   ::media::ChannelLayout channel_layout;
   int samples_per_second;
-  bool is_encrypted;
   size_t extra_data_size;
   std::vector<uint8_t> extra_data;
+  ::media::EncryptionScheme encryption_scheme;
 
   CHECK(msg->ReadPod(&codec));
   CHECK(msg->ReadPod(&channel_layout));
   CHECK(msg->ReadPod(&samples_per_second));
   CHECK(msg->ReadPod(&sample_format));
-  CHECK(msg->ReadPod(&is_encrypted));
+  encryption_scheme = EncryptionSchemeMarshaller::Read(msg);
   CHECK(msg->ReadPod(&extra_data_size));
 
   CHECK_GE(codec, ::media::kUnknownAudioCodec);
   CHECK_LE(codec, ::media::kAudioCodecMax);
   CHECK_GE(channel_layout, ::media::CHANNEL_LAYOUT_NONE);
   CHECK_LE(channel_layout, ::media::CHANNEL_LAYOUT_MAX);
   CHECK_GE(sample_format, ::media::kUnknownSampleFormat);
   CHECK_LE(sample_format, ::media::kSampleFormatMax);
   CHECK_LT(extra_data_size, kMaxExtraDataSize);
   if (extra_data_size > 0) {
     extra_data.resize(extra_data_size);
     CHECK(msg->ReadBuffer(&extra_data[0], extra_data.size()));
   }
 
   return ::media::AudioDecoderConfig(
       codec, sample_format,
       channel_layout, samples_per_second,
-      extra_data, is_encrypted);
+      extra_data, encryption_scheme);
 }
 
 }  // namespace media
 }  // namespace chromecast