118 lines
4.8 KiB
C++
118 lines
4.8 KiB
C++
/*
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* Copyright (c) 2013 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 MODULES_AUDIO_PROCESSING_TRANSIENT_FILE_UTILS_H_
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#define MODULES_AUDIO_PROCESSING_TRANSIENT_FILE_UTILS_H_
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#include <string.h>
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#include "rtc_base/system/file_wrapper.h"
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namespace webrtc {
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// This is a copy of the cast included in the Chromium codebase here:
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// http://cs.chromium.org/src/third_party/cld/base/casts.h
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template <class Dest, class Source>
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inline Dest bit_cast(const Source& source) {
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// A compile error here means your Dest and Source have different sizes.
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static_assert(sizeof(Dest) == sizeof(Source),
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"Dest and Source have different sizes");
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Dest dest;
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memcpy(&dest, &source, sizeof(dest));
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return dest;
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}
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// Converts the byte array with binary float representation to float.
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// Bytes must be in little-endian order.
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// Returns 0 if correct, -1 on error.
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int ConvertByteArrayToFloat(const uint8_t bytes[4], float* out);
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// Converts the byte array with binary double representation to double.
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// Bytes must be in little-endian order.
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// Returns 0 if correct, -1 on error.
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int ConvertByteArrayToDouble(const uint8_t bytes[8], double* out);
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// Converts a float to a byte array with binary float representation.
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// Bytes will be in little-endian order.
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// Returns 0 if correct, -1 on error.
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int ConvertFloatToByteArray(float value, uint8_t out_bytes[4]);
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// Converts a double to a byte array with binary double representation.
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// Bytes will be in little-endian order.
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// Returns 0 if correct, -1 on error.
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int ConvertDoubleToByteArray(double value, uint8_t out_bytes[8]);
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// Reads |length| 16-bit integers from |file| to |buffer|.
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// |file| must be previously opened.
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// Returns the number of 16-bit integers read or -1 on error.
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size_t ReadInt16BufferFromFile(FileWrapper* file,
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size_t length,
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int16_t* buffer);
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// Reads |length| 16-bit integers from |file| and stores those values
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// (converting them) in |buffer|.
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// |file| must be previously opened.
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// Returns the number of 16-bit integers read or -1 on error.
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size_t ReadInt16FromFileToFloatBuffer(FileWrapper* file,
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size_t length,
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float* buffer);
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// Reads |length| 16-bit integers from |file| and stores those values
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// (converting them) in |buffer|.
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// |file| must be previously opened.
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// Returns the number of 16-bit integers read or -1 on error.
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size_t ReadInt16FromFileToDoubleBuffer(FileWrapper* file,
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size_t length,
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double* buffer);
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// Reads |length| floats in binary representation (4 bytes) from |file| to
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// |buffer|.
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// |file| must be previously opened.
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// Returns the number of floats read or -1 on error.
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size_t ReadFloatBufferFromFile(FileWrapper* file, size_t length, float* buffer);
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// Reads |length| doubles in binary representation (8 bytes) from |file| to
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// |buffer|.
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// |file| must be previously opened.
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// Returns the number of doubles read or -1 on error.
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size_t ReadDoubleBufferFromFile(FileWrapper* file,
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size_t length,
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double* buffer);
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// Writes |length| 16-bit integers from |buffer| in binary representation (2
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// bytes) to |file|. It flushes |file|, so after this call there are no
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// writings pending.
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// |file| must be previously opened.
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// Returns the number of doubles written or -1 on error.
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size_t WriteInt16BufferToFile(FileWrapper* file,
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size_t length,
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const int16_t* buffer);
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// Writes |length| floats from |buffer| in binary representation (4 bytes) to
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// |file|. It flushes |file|, so after this call there are no writtings pending.
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// |file| must be previously opened.
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// Returns the number of doubles written or -1 on error.
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size_t WriteFloatBufferToFile(FileWrapper* file,
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size_t length,
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const float* buffer);
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// Writes |length| doubles from |buffer| in binary representation (8 bytes) to
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// |file|. It flushes |file|, so after this call there are no writings pending.
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// |file| must be previously opened.
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// Returns the number of doubles written or -1 on error.
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size_t WriteDoubleBufferToFile(FileWrapper* file,
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size_t length,
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const double* buffer);
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_TRANSIENT_FILE_UTILS_H_
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