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57 lines
1.6 KiB
57 lines
1.6 KiB
// Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include "base/common.h"
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#include "frontend/audio/feature_common.h"
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#include "frontend/audio/frontend_itf.h"
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#include "kaldi/feat/feature-window.h"
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namespace ppspeech {
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struct LinearSpectrogramOptions {
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kaldi::FrameExtractionOptions frame_opts;
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LinearSpectrogramOptions() : frame_opts() {}
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};
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class LinearSpectrogramComputer {
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public:
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typedef LinearSpectrogramOptions Options;
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explicit LinearSpectrogramComputer(const Options& opts);
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kaldi::FrameExtractionOptions& GetFrameOptions() {
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return opts_.frame_opts;
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}
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bool Compute(kaldi::Vector<kaldi::BaseFloat>* window,
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kaldi::Vector<kaldi::BaseFloat>* feat);
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int32 Dim() const { return dim_; }
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bool NeedRawLogEnergy() { return false; }
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private:
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kaldi::BaseFloat scale_;
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Options opts_;
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int32 frame_length_;
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int32 dim_;
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DISALLOW_COPY_AND_ASSIGN(LinearSpectrogramComputer);
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};
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typedef StreamingFeatureTpl<LinearSpectrogramComputer> LinearSpectrogram;
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} // namespace ppspeech
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