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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "chromecast/media/cma/backend/alsa/post_processing_pipeline_parser.h" |
| 6 |
| 7 #include "base/files/file_path.h" |
| 8 #include "base/files/file_util.h" |
| 9 #include "base/logging.h" |
| 10 #include "chromecast/base/serializers.h" |
| 11 #include "chromecast/media/base/audio_device_ids.h" |
| 12 #include "media/audio/audio_device_description.h" |
| 13 |
| 14 namespace chromecast { |
| 15 namespace media { |
| 16 |
| 17 namespace { |
| 18 |
| 19 const base::FilePath::CharType kPostProcessingPipelineFilePath[] = |
| 20 FILE_PATH_LITERAL("/etc/cast_audio.json"); |
| 21 |
| 22 const char kCommunicationPipelineKey[] = "communication"; |
| 23 const char kAlarmPipelineKey[] = "alarm"; |
| 24 const char kTtsPipelineKey[] = "tts"; |
| 25 const char kMediaPipelineKey[] = "media"; |
| 26 |
| 27 // TODO(bshaya): Use AudioContentType instead. |
| 28 std::string GetPipelineKey(const std::string& device_id) { |
| 29 if (device_id == ::media::AudioDeviceDescription::kCommunicationsDeviceId) { |
| 30 return kCommunicationPipelineKey; |
| 31 } |
| 32 if (device_id == kAlarmAudioDeviceId) { |
| 33 return kAlarmPipelineKey; |
| 34 } |
| 35 if (device_id == kTtsAudioDeviceId) { |
| 36 return kTtsPipelineKey; |
| 37 } |
| 38 if (device_id == ::media::AudioDeviceDescription::kDefaultDeviceId) { |
| 39 return kMediaPipelineKey; |
| 40 } |
| 41 NOTREACHED() << "Invalid device_id: " << device_id; |
| 42 return ""; |
| 43 } |
| 44 |
| 45 } // namespace |
| 46 |
| 47 PostProcessingPipelineParser::PostProcessingPipelineParser() = default; |
| 48 PostProcessingPipelineParser::~PostProcessingPipelineParser() = default; |
| 49 |
| 50 void PostProcessingPipelineParser::Initialize() { |
| 51 if (!base::PathExists(base::FilePath(kPostProcessingPipelineFilePath))) { |
| 52 LOG(WARNING) << "No post-processing config found in " |
| 53 << kPostProcessingPipelineFilePath << "."; |
| 54 return; |
| 55 } |
| 56 |
| 57 cast_audio_config_data_ = |
| 58 DeserializeJsonFromFile(base::FilePath(kPostProcessingPipelineFilePath)); |
| 59 base::DictionaryValue* audio_cfg_dict; |
| 60 CHECK(cast_audio_config_data_->GetAsDictionary(&audio_cfg_dict)) |
| 61 << "JSON formatting error in " << kPostProcessingPipelineFilePath; |
| 62 |
| 63 CHECK(audio_cfg_dict->GetDictionary("post_processing", &pipeline_dict_)) |
| 64 << "No \"post_processing\" object found in " |
| 65 << kPostProcessingPipelineFilePath; |
| 66 } |
| 67 |
| 68 base::ListValue* PostProcessingPipelineParser::GetPipelineByDeviceId( |
| 69 const std::string& device_id) { |
| 70 if (!pipeline_dict_) { |
| 71 return nullptr; |
| 72 } |
| 73 |
| 74 base::ListValue* out_list; |
| 75 std::string key = GetPipelineKey(device_id); |
| 76 if (!pipeline_dict_->GetList(key, &out_list)) { |
| 77 LOG(WARNING) << "No post-processor description found for \"" << key |
| 78 << "\" in " << kPostProcessingPipelineFilePath |
| 79 << ". Using passthrough."; |
| 80 return nullptr; |
| 81 } |
| 82 return out_list; |
| 83 } |
| 84 |
| 85 } // namepsace media |
| 86 } // namespace chromecast |
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