Load CMA backend from shared library

chromecast/media/cma/base/decoder_buffer_adapter.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/base/decoder_buffer_adapter.h"
 
+#include "chromecast/media/cma/base/cast_decrypt_config_impl.h"
+#include "chromecast/public/media/cast_decrypt_config.h"
 #include "media/base/decoder_buffer.h"
 
 namespace chromecast {
 namespace media {
 
 DecoderBufferAdapter::DecoderBufferAdapter(
     const scoped_refptr<::media::DecoderBuffer>& buffer)
     : DecoderBufferAdapter(kPrimary, buffer) {
 }
 
 DecoderBufferAdapter::DecoderBufferAdapter(
     StreamId stream_id, const scoped_refptr<::media::DecoderBuffer>& buffer)
     : stream_id_(stream_id),
       buffer_(buffer) {
 }
 
 DecoderBufferAdapter::~DecoderBufferAdapter() {
 }
 
 StreamId DecoderBufferAdapter::stream_id() const {
   return stream_id_;
 }
 
 base::TimeDelta DecoderBufferAdapter::timestamp() const {
   return buffer_->timestamp();
 }
 
-void DecoderBufferAdapter::set_timestamp(const base::TimeDelta& timestamp) {
+void DecoderBufferAdapter::set_timestamp(base::TimeDelta timestamp) {
   buffer_->set_timestamp(timestamp);
 }
 
 const uint8* DecoderBufferAdapter::data() const {
   return buffer_->data();
 }
 
 uint8* DecoderBufferAdapter::writable_data() const {
   return buffer_->writable_data();
 }
 
 size_t DecoderBufferAdapter::data_size() const {
   return buffer_->data_size();
 }
 
-const ::media::DecryptConfig* DecoderBufferAdapter::decrypt_config() const {
-  return buffer_->decrypt_config();
+const CastDecryptConfig* DecoderBufferAdapter::decrypt_config() const {
+  if (buffer_->decrypt_config() && !decrypt_config_) {
+    const ::media::DecryptConfig* config = buffer_->decrypt_config();
+    decrypt_config_.reset(new CastDecryptConfigImpl(*config));
+  }
+
+  return decrypt_config_.get();
 }
 
 bool DecoderBufferAdapter::end_of_stream() const {
   return buffer_->end_of_stream();
 }
 
 }  // namespace media
 }  // namespace chromecast