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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 #ifndef CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_H_ |
| 6 #define CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_H_ |
| 7 |
| 8 #include <cstdint> |
| 9 #include <memory> |
| 10 #include <unordered_map> |
| 11 #include <vector> |
| 12 |
| 13 #include "base/macros.h" |
| 14 |
| 15 namespace base { |
| 16 class ListValue; |
| 17 class ScopedNativeLibrary; |
| 18 } // namespace base |
| 19 |
| 20 namespace chromecast { |
| 21 namespace media { |
| 22 |
| 23 class AudioPostProcessor; |
| 24 |
| 25 // Creates and contains multiple AudioPostProcessors, as specified in ctor. |
| 26 // Provides convenience methods to access and use the AudioPostProcessors. |
| 27 class PostProcessingPipeline { |
| 28 public: |
| 29 PostProcessingPipeline(const base::ListValue* filter_description_list, |
| 30 int channels); |
| 31 ~PostProcessingPipeline(); |
| 32 |
| 33 // TODO(bshaya): Switch to float* |
| 34 int ProcessFrames(uint8_t* data, int num_frames, float current_volume); |
| 35 bool SetSampleRate(int sample_rate); |
| 36 int GetRingingTimeInFrames(); |
| 37 |
| 38 private: |
| 39 int sample_rate_; |
| 40 std::vector<std::unique_ptr<AudioPostProcessor>> processors_; |
| 41 |
| 42 // Contains all libraries in use; |
| 43 // Functions in shared objects cannot be used once library is closed. |
| 44 std::unordered_map<std::string, std::unique_ptr<base::ScopedNativeLibrary>> |
| 45 libraries_; |
| 46 |
| 47 DISALLOW_COPY_AND_ASSIGN(PostProcessingPipeline); |
| 48 }; |
| 49 |
| 50 } // namespace media |
| 51 } // namespace chromecast |
| 52 |
| 53 #endif // CHROMECAST_MEDIA_CMA_BACKEND_ALSA_POST_PROCESSING_PIPELINE_H_ |
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