89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
/*
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* AudioDefs.h - Definitions for audio I/O
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*
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* Copyright 1995-2012 The MathWorks, Inc.
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*/
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#ifndef AUDIODEFS_H
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#define AUDIODEFS_H
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/* these follow Simulink data types, in simstruc_types.h */
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typedef enum
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{
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AudioDataType_Double = 0, /* double */
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AudioDataType_Single, /* float */
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AudioDataType_Int8, /* char */
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AudioDataType_Uint8, /* unsigned char */
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AudioDataType_Int16, /* short */
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AudioDataType_Uint16, /* unsigned short */
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AudioDataType_Int32, /* long */
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AudioDataType_Uint32, /* unsigned long */
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AudioDataType_INVALID, /* bool */
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AudioDataType_Int24, /* 24-bit signed */
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AudioDataType_Uint24, /* 24-bit unsigned */
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AudioDataType_NUM_TYPES
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} AudioDataType;
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static const int AudioDataTypeSize[] = {8,4,1,1,2,2,4,4,1,3,3};
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static const int AudioDataTypeFloat[] = {1,1,0,0,0,0,0,0,0,0,0};
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/* An enumeration of typical audio data types which is used on several masks. */
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typedef enum {
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AudioDT_Invalid = 0,
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AudioDT_Derived = 1,
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AudioDT_Uint8,
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AudioDT_Int16,
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AudioDT_Int24,
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AudioDT_Single,
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AudioDT_NUM_TYPES
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} AudioDTE_Common;
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/* The default mapping from AudioDataTypes onto common audio data types */
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static const AudioDTE_Common AudioDataTypeToCommonDTE[] = {
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AudioDT_Single,
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AudioDT_Single,
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AudioDT_Uint8,
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AudioDT_Uint8,
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AudioDT_Int16,
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AudioDT_Int16,
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AudioDT_Int24,
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AudioDT_Int24,
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AudioDT_Invalid,
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AudioDT_Int24,
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AudioDT_Int24
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};
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/* Mapping from common data types to Audio Data Types */
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static const AudioDataType CommonDTEToAudioDataType[] = {
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AudioDataType_INVALID,
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AudioDataType_INVALID,
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AudioDataType_Uint8,
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AudioDataType_Int16,
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AudioDataType_Int24,
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AudioDataType_Single
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};
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typedef struct
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{
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unsigned char isValid; /* zero if the file has no audio */
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/* The following fields refer to the PCM format of the audio data as encoded in the file/device */
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unsigned char isFloat; /* true if the samples are in floating-point format */
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double sampleRate; /* audio sample rate */
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int numBits; /* audio bit depth */
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int numChannels; /* number of audio channels (typically 1 or two) */
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/* The following fields refer to the format of the data in MATLAB/Simulink */
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AudioDataType dataType; /* data type of audio samples */
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int frameSize; /* number of audio samples per frame */
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/* The name of the compression format, if we are writing a file */
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const char* audioCompressor; /* set to NULL for none */
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} MMAudioInfo;
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#endif /* AUDIODEFS_H */
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