Index: chromecast/media/cma/backend/alsa/post_processors/governor_shlib.cc |
diff --git a/chromecast/media/cma/backend/alsa/post_processors/governor_shlib.cc b/chromecast/media/cma/backend/alsa/post_processors/governor_shlib.cc |
deleted file mode 100644 |
index e4af055ab791498943dbea720d6a73d93ecbd6ee..0000000000000000000000000000000000000000 |
--- a/chromecast/media/cma/backend/alsa/post_processors/governor_shlib.cc |
+++ /dev/null |
@@ -1,115 +0,0 @@ |
-// Copyright 2017 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 <memory> |
-#include <string> |
- |
-#include "base/logging.h" |
-#include "base/macros.h" |
-#include "base/values.h" |
-#include "chromecast/base/serializers.h" |
-#include "chromecast/media/cma/backend/alsa/slew_volume.h" |
-#include "chromecast/public/media/audio_post_processor_shlib.h" |
- |
-namespace chromecast { |
-namespace media { |
- |
-namespace { |
-const int kNoSampleRate = -1; |
- |
-// Configuration strings: |
-const char kOnsetVolumeKey[] = "onset_volume"; |
-const char kClampMultiplierKey[] = "clamp_multiplier"; |
- |
-} // namespace |
- |
-// Provides a flat reduction in output volume if the input volume is above a |
-// given threshold. |
-// Used to protect speakers at high output levels |
-// while providing dyanmic range at low output level. |
-// The configuration string for this plugin is: |
-// {"onset_volume": |VOLUME_TO_CLAMP|, "clamp_multiplier": |CLAMP_MULTIPLIER|} |
-// Input volumes > |VOLUME_TO_CLAMP| will be attenuated by |CLAMP_MULTIPLIER|. |
-class Governor : public AudioPostProcessor { |
- public: |
- Governor(const std::string& config, int channels); |
- ~Governor() override; |
- |
- bool SetSampleRate(int sample_rate) override; |
- int ProcessFrames(const std::vector<float*>& data, |
- int frames, |
- float volume) override; |
- int GetRingingTimeInFrames() override; |
- |
- private: |
- float GetGovernorMultiplier(); |
- |
- int channels_; |
- int sample_rate_; |
- float volume_; |
- double onset_volume_; |
- double clamp_multiplier_; |
- SlewVolume governor_; |
- DISALLOW_COPY_AND_ASSIGN(Governor); |
-}; |
- |
-Governor::Governor(const std::string& config, int channels) |
- : channels_(channels), sample_rate_(kNoSampleRate), volume_(1.0) { |
- auto config_dict = base::DictionaryValue::From(DeserializeFromJson(config)); |
- CHECK(config_dict) << "Governor config is not valid json: " << config; |
- CHECK(config_dict->GetDouble(kOnsetVolumeKey, &onset_volume_)); |
- CHECK(config_dict->GetDouble(kClampMultiplierKey, &clamp_multiplier_)); |
- DCHECK_EQ(channels_, 2); |
- governor_.SetVolume(1.0); |
- LOG(INFO) << "Created a governor: onset_volume = " << onset_volume_ |
- << ", clamp_multiplier = " << clamp_multiplier_; |
-} |
- |
-Governor::~Governor() = default; |
- |
-bool Governor::SetSampleRate(int sample_rate) { |
- sample_rate_ = sample_rate; |
- governor_.SetSampleRate(sample_rate); |
- return true; |
-} |
- |
-int Governor::ProcessFrames(const std::vector<float*>& data, |
- int frames, |
- float volume) { |
- DCHECK_EQ(data.size(), static_cast<size_t>(channels_)); |
- |
- if (volume != volume_) { |
- volume_ = volume; |
- governor_.SetVolume(GetGovernorMultiplier()); |
- } |
- |
- for (int c = 0; c < channels_; ++c) { |
- DCHECK(data[c]); |
- governor_.ProcessFMAC(c != 0 /* repeat_transition */, data[c], frames, |
- data[c]); |
- } |
- |
- return 0; // No delay in this pipeline. |
-} |
- |
-int Governor::GetRingingTimeInFrames() { |
- return 0; |
-} |
- |
-float Governor::GetGovernorMultiplier() { |
- if (volume_ >= onset_volume_) { |
- return clamp_multiplier_; |
- } |
- return 1.0; |
-} |
- |
-} // namespace media |
-} // namespace chromecast |
- |
-chromecast::media::AudioPostProcessor* AudioPostProcessorShlib_Create( |
- const std::string& config, |
- int channels) { |
- return static_cast<chromecast::media::AudioPostProcessor*>( |
- new chromecast::media::Governor(config, channels)); |
-} |