Load CMA backend from shared library

chromecast/media/cma/pipeline/decrypt_util.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/pipeline/decrypt_util.h"
 
 #include <openssl/aes.h>
 #include <string>
 
 #include "base/logging.h"
 #include "chromecast/media/cma/base/decoder_buffer_base.h"
+#include "chromecast/public/media/cast_decrypt_config.h"
 #include "crypto/symmetric_key.h"
-#include "media/base/decrypt_config.h"
 
 namespace chromecast {
 namespace media {
 
 namespace {
 
 class DecoderBufferClear : public DecoderBufferBase {
  public:
   explicit DecoderBufferClear(const scoped_refptr<DecoderBufferBase>& buffer);
 
   // DecoderBufferBase implementation.
   StreamId stream_id() const override;
   base::TimeDelta timestamp() const override;
-  void set_timestamp(const base::TimeDelta& timestamp) override;
+  void set_timestamp(base::TimeDelta timestamp) override;
   const uint8* data() const override;
   uint8* writable_data() const override;
   size_t data_size() const override;
-  const ::media::DecryptConfig* decrypt_config() const override;
+  const CastDecryptConfig* decrypt_config() const override;
   bool end_of_stream() const override;
 
  private:
   ~DecoderBufferClear() override;
 
   scoped_refptr<DecoderBufferBase> const buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(DecoderBufferClear);
 };
 
 DecoderBufferClear::DecoderBufferClear(
     const scoped_refptr<DecoderBufferBase>& buffer)
     : buffer_(buffer) {
 }
 
 DecoderBufferClear::~DecoderBufferClear() {
 }
 
 StreamId DecoderBufferClear::stream_id() const {
   return buffer_->stream_id();
 }
 
 base::TimeDelta DecoderBufferClear::timestamp() const {
   return buffer_->timestamp();
 }
 
-void DecoderBufferClear::set_timestamp(const base::TimeDelta& timestamp) {
+void DecoderBufferClear::set_timestamp(base::TimeDelta timestamp) {
   buffer_->set_timestamp(timestamp);
 }
 
 const uint8* DecoderBufferClear::data() const {
   return buffer_->data();
 }
 
 uint8* DecoderBufferClear::writable_data() const {
   return buffer_->writable_data();
 }
 
 size_t DecoderBufferClear::data_size() const {
   return buffer_->data_size();
 }
 
-const ::media::DecryptConfig* DecoderBufferClear::decrypt_config() const {
+const CastDecryptConfig* DecoderBufferClear::decrypt_config() const {
   // Buffer is clear so no decryption info.
   return NULL;
 }
 
 bool DecoderBufferClear::end_of_stream() const {
   return buffer_->end_of_stream();
 }
 
 }  // namespace
 
 scoped_refptr<DecoderBufferBase> DecryptDecoderBuffer(
     const scoped_refptr<DecoderBufferBase>& buffer,
     crypto::SymmetricKey* key) {
   if (buffer->end_of_stream())
     return buffer;
 
-  const ::media::DecryptConfig* decrypt_config = buffer->decrypt_config();
+  const CastDecryptConfig* decrypt_config = buffer->decrypt_config();
   if (!decrypt_config || decrypt_config->iv().size() == 0)
     return buffer;
 
   // Get the key.
   std::string raw_key;
   if (!key->GetRawKey(&raw_key)) {
     LOG(ERROR) << "Failed to get the underlying AES key";
     return buffer;
   }
   DCHECK_EQ(static_cast<int>(raw_key.length()), AES_BLOCK_SIZE);
   const uint8* key_u8 = reinterpret_cast<const uint8*>(raw_key.data());
   AES_KEY aes_key;
   if (AES_set_encrypt_key(key_u8, AES_BLOCK_SIZE * 8, &aes_key) != 0) {
     LOG(ERROR) << "Failed to set the AES key";
     return buffer;
   }
 
   // Get the IV.
   uint8 aes_iv[AES_BLOCK_SIZE];
   DCHECK_EQ(static_cast<int>(decrypt_config->iv().length()),
             AES_BLOCK_SIZE);
   memcpy(aes_iv, decrypt_config->iv().data(), AES_BLOCK_SIZE);
 
   // Decryption state.
   unsigned int encrypted_byte_offset = 0;
   uint8 ecount_buf[AES_BLOCK_SIZE];
 
   // Perform the decryption.
-  const std::vector< ::media::SubsampleEntry>& subsamples =
-      decrypt_config->subsamples();
+  const std::vector<SubsampleEntry>& subsamples = decrypt_config->subsamples();
   uint8* data = buffer->writable_data();
   uint32 offset = 0;
   for (size_t k = 0; k < subsamples.size(); k++) {
     offset += subsamples[k].clear_bytes;
     uint32 cypher_bytes = subsamples[k].cypher_bytes;
     CHECK_LE(static_cast<size_t>(offset + cypher_bytes), buffer->data_size());
     AES_ctr128_encrypt(
         data + offset, data + offset, cypher_bytes, &aes_key,
         aes_iv, ecount_buf, &encrypted_byte_offset);
     offset += cypher_bytes;
   }
 
   return scoped_refptr<DecoderBufferBase>(new DecoderBufferClear(buffer));
 }
 
 }  // namespace media
 }  // namespace chromecast