| 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 | #include "utils/wav.h" |
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| 18 | |
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| 19 | #include <cerrno> |
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| 20 | #include <fstream> |
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| 21 | #include <string> |
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| 22 | |
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| 23 | #include "base/integral_types.h" |
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| 24 | #include "base/logging.h" |
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| 25 | #include "utils/wav_reader.h" |
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| 26 | |
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| 27 | namespace vraudio { |
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| 28 | |
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| 29 | Wav::Wav(size_t num_channels, int sample_rate, |
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| 30 | std::vector<int16_t>&& interleaved_samples) |
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| 31 | : num_channels_(num_channels), |
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| 32 | sample_rate_(sample_rate), |
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| 33 | interleaved_samples_(interleaved_samples) {} |
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| 34 | |
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| 35 | Wav::~Wav() {} |
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| 36 | |
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| 37 | std::unique_ptr<const Wav> Wav::CreateOrNull(std::istream* binary_stream) { |
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| 38 | WavReader wav_reader(binary_stream); |
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| 39 | const size_t num_total_samples = wav_reader.GetNumTotalSamples(); |
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| 40 | if (!wav_reader.IsHeaderValid() || num_total_samples == 0) { |
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| 41 | return nullptr; |
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| 42 | } |
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| 43 | std::vector<int16> interleaved_samples(num_total_samples); |
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| 44 | if (wav_reader.ReadSamples(num_samples: num_total_samples, target_buffer: &interleaved_samples[0]) != |
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| 45 | num_total_samples) { |
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| 46 | return nullptr; |
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| 47 | } |
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| 48 | return std::unique_ptr<Wav>(new Wav(wav_reader.GetNumChannels(), |
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| 49 | wav_reader.GetSampleRateHz(), |
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| 50 | std::move(interleaved_samples))); |
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| 51 | } |
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| 52 | |
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| 53 | } // namespace vraudio |
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| 54 | |
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