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73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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* Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_COMMON_AUDIO_WAV_WRITER_H_
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#define WEBRTC_COMMON_AUDIO_WAV_WRITER_H_
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#ifdef __cplusplus
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#include <stdint.h>
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#include <cstddef>
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#include <string>
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namespace webrtc {
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// Simple C++ class for writing 16-bit PCM WAV files. All error handling is
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// by calls to FATAL_ERROR(), making it unsuitable for anything but debug code.
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class WavFile {
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public:
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// Open a new WAV file for writing.
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WavFile(const std::string& filename, int sample_rate, int num_channels);
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// Close the WAV file, after writing its header.
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~WavFile();
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// Write additional samples to the file. Each sample is in the range
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// [-32768,32767], and there must be the previously specified number of
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// interleaved channels.
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void WriteSamples(const float* samples, size_t num_samples);
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int sample_rate() const { return sample_rate_; }
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int num_channels() const { return num_channels_; }
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uint32_t num_samples() const { return num_samples_; }
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private:
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void WriteSamples(const int16_t* samples, size_t num_samples);
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void Close();
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const int sample_rate_;
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const int num_channels_;
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uint32_t num_samples_; // total number of samples written to file
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FILE* file_handle_; // output file, owned by this class
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};
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} // namespace webrtc
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extern "C" {
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#endif // __cplusplus
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// C wrappers for the WavFile class.
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typedef struct rtc_WavFile rtc_WavFile;
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rtc_WavFile* rtc_WavOpen(const char* filename,
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int sample_rate,
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int num_channels);
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void rtc_WavClose(rtc_WavFile* wf);
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void rtc_WavWriteSamples(rtc_WavFile* wf,
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const float* samples,
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size_t num_samples);
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int rtc_WavSampleRate(const rtc_WavFile* wf);
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int rtc_WavNumChannels(const rtc_WavFile* wf);
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uint32_t rtc_WavNumSamples(const rtc_WavFile* wf);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // WEBRTC_COMMON_AUDIO_WAV_WRITER_H_
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