From 8adfb3bd99b4dcff2459756af090a640fd7a4b4a Mon Sep 17 00:00:00 2001 From: yo mama Date: Fri, 19 Jun 2015 16:24:27 -0400 Subject: clone --- .../soundtouch/source/SoundStretch/WavFile.h | 250 +++++++++++++++++++++ 1 file changed, 250 insertions(+) create mode 100644 pysoundtouch/soundtouch/source/SoundStretch/WavFile.h (limited to 'pysoundtouch/soundtouch/source/SoundStretch/WavFile.h') diff --git a/pysoundtouch/soundtouch/source/SoundStretch/WavFile.h b/pysoundtouch/soundtouch/source/SoundStretch/WavFile.h new file mode 100644 index 0000000..8effe17 --- /dev/null +++ b/pysoundtouch/soundtouch/source/SoundStretch/WavFile.h @@ -0,0 +1,250 @@ +//////////////////////////////////////////////////////////////////////////////// +/// +/// Classes for easy reading & writing of WAV sound files. +/// +/// For big-endian CPU, define BIG_ENDIAN during compile-time to correctly +/// parse the WAV files with such processors. +/// +/// Admittingly, more complete WAV reader routines may exist in public domain, but +/// the reason for 'yet another' one is that those generic WAV reader libraries are +/// exhaustingly large and cumbersome! Wanted to have something simpler here, i.e. +/// something that's not already larger than rest of the SoundTouch/SoundStretch program... +/// +/// Author : Copyright (c) Olli Parviainen +/// Author e-mail : oparviai 'at' iki.fi +/// SoundTouch WWW: http://www.surina.net/soundtouch +/// +//////////////////////////////////////////////////////////////////////////////// +// +// Last changed : $Date: 2009-02-21 18:00:14 +0200 (Sat, 21 Feb 2009) $ +// File revision : $Revision: 4 $ +// +// $Id: WavFile.h 63 2009-02-21 16:00:14Z oparviai $ +// +//////////////////////////////////////////////////////////////////////////////// +// +// License : +// +// SoundTouch audio processing library +// Copyright (c) Olli Parviainen +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +//////////////////////////////////////////////////////////////////////////////// + +#ifndef WAVFILE_H +#define WAVFILE_H + +#include + +#ifndef uint +typedef unsigned int uint; +#endif + + +/// WAV audio file 'riff' section header +typedef struct +{ + char riff_char[4]; + int package_len; + char wave[4]; +} WavRiff; + +/// WAV audio file 'format' section header +typedef struct +{ + char fmt[4]; + int format_len; + short fixed; + short channel_number; + int sample_rate; + int byte_rate; + short byte_per_sample; + short bits_per_sample; +} WavFormat; + +/// WAV audio file 'data' section header +typedef struct +{ + char data_field[4]; + uint data_len; +} WavData; + + +/// WAV audio file header +typedef struct +{ + WavRiff riff; + WavFormat format; + WavData data; +} WavHeader; + + +/// Class for reading WAV audio files. +class WavInFile +{ +private: + /// File pointer. + FILE *fptr; + + /// Counter of how many bytes of sample data have been read from the file. + uint dataRead; + + /// WAV header information + WavHeader header; + + /// Init the WAV file stream + void init(); + + /// Read WAV file headers. + /// \return zero if all ok, nonzero if file format is invalid. + int readWavHeaders(); + + /// Checks WAV file header tags. + /// \return zero if all ok, nonzero if file format is invalid. + int checkCharTags() const; + + /// Reads a single WAV file header block. + /// \return zero if all ok, nonzero if file format is invalid. + int readHeaderBlock(); + + /// Reads WAV file 'riff' block + int readRIFFBlock(); + +public: + /// Constructor: Opens the given WAV file. If the file can't be opened, + /// throws 'runtime_error' exception. + WavInFile(const char *filename); + + WavInFile(FILE *file); + + /// Destructor: Closes the file. + ~WavInFile(); + + /// Rewind to beginning of the file + void rewind(); + + /// Get sample rate. + uint getSampleRate() const; + + /// Get number of bits per sample, i.e. 8 or 16. + uint getNumBits() const; + + /// Get sample data size in bytes. Ahem, this should return same information as + /// 'getBytesPerSample'... + uint getDataSizeInBytes() const; + + /// Get total number of samples in file. + uint getNumSamples() const; + + /// Get number of bytes per audio sample (e.g. 16bit stereo = 4 bytes/sample) + uint getBytesPerSample() const; + + /// Get number of audio channels in the file (1=mono, 2=stereo) + uint getNumChannels() const; + + /// Get the audio file length in milliseconds + uint getLengthMS() const; + + /// Reads audio samples from the WAV file. This routine works only for 8 bit samples. + /// Reads given number of elements from the file or if end-of-file reached, as many + /// elements as are left in the file. + /// + /// \return Number of 8-bit integers read from the file. + int read(char *buffer, int maxElems); + + /// Reads audio samples from the WAV file to 16 bit integer format. Reads given number + /// of elements from the file or if end-of-file reached, as many elements as are + /// left in the file. + /// + /// \return Number of 16-bit integers read from the file. + int read(short *buffer, ///< Pointer to buffer where to read data. + int maxElems ///< Size of 'buffer' array (number of array elements). + ); + + /// Reads audio samples from the WAV file to floating point format, converting + /// sample values to range [-1,1[. Reads given number of elements from the file + /// or if end-of-file reached, as many elements as are left in the file. + /// + /// \return Number of elements read from the file. + int read(float *buffer, ///< Pointer to buffer where to read data. + int maxElems ///< Size of 'buffer' array (number of array elements). + ); + + /// Check end-of-file. + /// + /// \return Nonzero if end-of-file reached. + int eof() const; +}; + + + +/// Class for writing WAV audio files. +class WavOutFile +{ +private: + /// Pointer to the WAV file + FILE *fptr; + + /// WAV file header data. + WavHeader header; + + /// Counter of how many bytes have been written to the file so far. + int bytesWritten; + + /// Fills in WAV file header information. + void fillInHeader(const uint sampleRate, const uint bits, const uint channels); + + /// Finishes the WAV file header by supplementing information of amount of + /// data written to file etc + void finishHeader(); + + /// Writes the WAV file header. + void writeHeader(); + +public: + /// Constructor: Creates a new WAV file. Throws a 'runtime_error' exception + /// if file creation fails. + WavOutFile(const char *fileName, ///< Filename + int sampleRate, ///< Sample rate (e.g. 44100 etc) + int bits, ///< Bits per sample (8 or 16 bits) + int channels ///< Number of channels (1=mono, 2=stereo) + ); + + WavOutFile(FILE *file, int sampleRate, int bits, int channels); + + /// Destructor: Finalizes & closes the WAV file. + ~WavOutFile(); + + /// Write data to WAV file. This function works only with 8bit samples. + /// Throws a 'runtime_error' exception if writing to file fails. + void write(const char *buffer, ///< Pointer to sample data buffer. + int numElems ///< How many array items are to be written to file. + ); + + /// Write data to WAV file. Throws a 'runtime_error' exception if writing to + /// file fails. + void write(const short *buffer, ///< Pointer to sample data buffer. + int numElems ///< How many array items are to be written to file. + ); + + /// Write data to WAV file in floating point format, saturating sample values to range + /// [-1..+1[. Throws a 'runtime_error' exception if writing to file fails. + void write(const float *buffer, ///< Pointer to sample data buffer. + int numElems ///< How many array items are to be written to file. + ); +}; + +#endif -- cgit v1.2.3-70-g09d2