| 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_UTILS_WAV_H_ |
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| 18 | #define RESONANCE_AUDIO_UTILS_WAV_H_ |
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| 19 | |
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| 20 | #include <cstdint> |
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| 21 | #include <memory> |
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| 22 | #include <vector> |
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| 23 | |
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| 24 | namespace vraudio { |
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| 25 | |
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| 26 | // Wraps WavReader class to decode a wav file into memory. |
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| 27 | class Wav { |
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| 28 | public: |
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| 29 | ~Wav(); |
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| 30 | |
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| 31 | // Reads a RIFF WAVE from an opened binary stream. |
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| 32 | static std::unique_ptr<const Wav> CreateOrNull(std::istream* binary_stream); |
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| 33 | |
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| 34 | // Returns reference to interleaved samples. |
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| 35 | const std::vector<int16_t>& interleaved_samples() const { |
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| 36 | return interleaved_samples_; |
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| 37 | } |
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| 38 | |
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| 39 | // Returns number of channels. |
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| 40 | size_t GetNumChannels() const { return num_channels_; } |
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| 41 | |
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| 42 | // Returns sample rate. |
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| 43 | int GetSampleRateHz() const { return sample_rate_; } |
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| 44 | |
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| 45 | private: |
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| 46 | // Private constructor used by static factory methods. |
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| 47 | // |
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| 48 | // @param num_channels Number of audio channels. |
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| 49 | // @param sample_rate Sample rate. |
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| 50 | // @param interleaved_samples Decoded interleaved samples. |
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| 51 | Wav(size_t num_channels, int sample_rate, |
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| 52 | std::vector<int16_t>&& interleaved_samples); |
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| 53 | |
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| 54 | // Number of channels. |
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| 55 | size_t num_channels_; |
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| 56 | |
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| 57 | // Sample rate. |
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| 58 | int sample_rate_; |
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| 59 | |
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| 60 | // Interleaved samples. |
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| 61 | std::vector<int16_t> interleaved_samples_; |
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| 62 | }; |
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| 63 | |
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| 64 | } // namespace vraudio |
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| 65 | |
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| 66 | #endif // RESONANCE_AUDIO_UTILS_WAV_H_ |
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| 67 | |
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