[Chromecast] Process streams with different post-processing.

chromecast/media/cma/backend/media_pipeline_backend_manager.cc

 // Copyright 2016 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/backend/media_pipeline_backend_manager.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/memory/ptr_util.h"
@@ skipping 27 matching lines @@
     const media::MediaPipelineDeviceParams& params) {
   DCHECK(media_task_runner_->BelongsToCurrentThread());
   return CreateMediaPipelineBackend(params, 0);
 }
 
 std::unique_ptr<MediaPipelineBackend>
 MediaPipelineBackendManager::CreateMediaPipelineBackend(
     const media::MediaPipelineDeviceParams& params,
     int stream_type) {
   DCHECK(media_task_runner_->BelongsToCurrentThread());
+  LOG(INFO) << "Creating a " << params.name << " with type " << stream_type;
   std::unique_ptr<MediaPipelineBackend> backend_ptr(
       new MediaPipelineBackendWrapper(
           base::WrapUnique(
               media::CastMediaShlib::CreateMediaPipelineBackend(params)),
           stream_type, GetVolumeMultiplier(stream_type), this));
   media_pipeline_backends_.push_back(backend_ptr.get());
   return backend_ptr;
 }
 
 bool MediaPipelineBackendManager::IncrementDecoderCount(DecoderType type) {
@@ skipping 46 matching lines @@
   auto it = volume_by_stream_type_.find(stream_type);
   if (it == volume_by_stream_type_.end()) {
     return 1.0;
   } else {
     return it->second;
   }
 }
 
 }  // namespace media
 }  // namespace chromecast