| 1 | /* |
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| 2 | Copyright 2018 Google Inc. All Rights Reserved. |
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| 3 | |
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| 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | you may not use this file except in compliance with the License. |
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| 6 | You may obtain a copy of the License at |
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| 7 | |
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| 8 | http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | |
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| 10 | Unless required by applicable law or agreed to in writing, software |
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| 11 | distributed under the License is distributed on an "AS-IS" BASIS, |
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| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | See the License for the specific language governing permissions and |
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| 14 | limitations under the License. |
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| 15 | */ |
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| 16 | |
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| 17 | #ifndef RESONANCE_AUDIO_DSP_SH_HRIR_CREATOR_H_ |
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| 18 | #define RESONANCE_AUDIO_DSP_SH_HRIR_CREATOR_H_ |
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| 19 | |
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| 20 | #include "base/audio_buffer.h" |
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| 21 | #include "dsp/resampler.h" |
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| 22 | #include "utils/wav.h" |
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| 23 | |
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| 24 | namespace vraudio { |
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| 25 | |
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| 26 | // Creates a multichannel audio buffer of Spherical Harmonic-encoded Head |
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| 27 | // Related Impulse Responses (SH HRIRs) from Wav SH HRIR assets. It also |
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| 28 | // checks if the channel count of the SH HRIR file is correct and resamples the |
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| 29 | // SH HRIRs if necessary to match the system (target) sampling rate. |
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| 30 | // |
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| 31 | // @param wav |Wav| instance that contains SH HRIRs. |
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| 32 | // @param target_sample_rate_hz Target sampling rate in Hertz. |
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| 33 | // @param resampler Pointer to a resampler used to convert HRIRs to the system |
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| 34 | // rate, |
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| 35 | // (This resampler's internal state will be reset on each function call). |
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| 36 | // @return Unique pointer to |AudioBuffer| where the SH HRIRs will be written. |
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| 37 | std::unique_ptr<AudioBuffer> CreateShHrirsFromWav(const Wav& wav, |
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| 38 | int target_sample_rate_hz, |
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| 39 | Resampler* resampler); |
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| 40 | |
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| 41 | // Creates a SH HRIR multichannel audio buffer from assets. |
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| 42 | // |
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| 43 | // @param filename Name of the Wav file that contains SH HRIRs. |
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| 44 | // @param target_sample_rate_hz Target sampling rate in Hertz. |
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| 45 | // @param resampler Pointer to a resampler used to convert HRIRs to the system |
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| 46 | // rate. |
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| 47 | // @return Unique pointer to |AudioBuffer| where the SH HRIRs will be written. |
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| 48 | std::unique_ptr<AudioBuffer> CreateShHrirsFromAssets( |
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| 49 | const std::string& filename, int target_sample_rate_hz, |
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| 50 | Resampler* resampler); |
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| 51 | |
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| 52 | } // namespace vraudio |
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| 53 | |
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| 54 | #endif // RESONANCE_AUDIO_DSP_SH_HRIR_CREATOR_H_ |
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| 55 | |
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