Chromecast: Add stream id interface in DecoderBufferBase class

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 "media/base/decoder_buffer.h"
 
 namespace chromecast {
 namespace media {
 
 DecoderBufferAdapter::DecoderBufferAdapter(
-    const scoped_refptr< ::media::DecoderBuffer>& buffer)
-    : buffer_(buffer) {
+    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();
 }
 
 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();
 }
 
 bool DecoderBufferAdapter::end_of_stream() const {
   return buffer_->end_of_stream();
 }
 
 }  // namespace media
 }  // namespace chromecast