mirror of
https://github.com/fadden/ciderpress.git
synced 2024-11-17 03:09:38 +00:00
99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
/*
|
|
* CiderPress
|
|
* Copyright (C) 2007 by faddenSoft, LLC. All Rights Reserved.
|
|
* See the file LICENSE for distribution terms.
|
|
*/
|
|
/*
|
|
* Class that encapsulates a sound file. Includes loading of sounds from WAV
|
|
* files and other formats. Does not create or write sound files.
|
|
*
|
|
* [ Copied from libfadden. ]
|
|
*/
|
|
#ifndef UTIL_SOUNDFILE_H
|
|
#define UTIL_SOUNDFILE_H
|
|
|
|
#include <mmsystem.h>
|
|
|
|
/*
|
|
* Class providing read-only access to uncompressed sound samples and
|
|
* associated meta-data. The sound is assumed to fit in main memory.
|
|
*
|
|
* Because game sound effects are generally loaded into "secondary sound
|
|
* buffers" allocated by DirectX, this class doesn't load the sound data
|
|
* into local storage unless necessary.
|
|
*
|
|
* WAV data is little-endian. 8-bit data is unsigned, 16-bit data is
|
|
* signed.
|
|
*/
|
|
class SoundFile {
|
|
public:
|
|
SoundFile(void) :
|
|
mFP(NULL),
|
|
mDoClose(false),
|
|
mFileStart(0),
|
|
mSampleStart(-1),
|
|
mSampleLen(-1)
|
|
{
|
|
memset(&mFormat, 0, sizeof(mFormat));
|
|
}
|
|
virtual ~SoundFile(void) {
|
|
if (mDoClose && mFP != NULL)
|
|
fclose(mFP);
|
|
}
|
|
|
|
/* create the object from a file on disk; returns 0 on success */
|
|
int Create(const WCHAR* fileName, CString* pErrMsg);
|
|
/* create from FILE*; if doClose==true, file will be closed on error */
|
|
int Create(FILE* fp, long len, bool doClose, CString* pErrMsg);
|
|
|
|
/* create object from a buffer of memory */
|
|
//int Create(const void* buf, long len);
|
|
|
|
/* read a block of audio samples from the specified offset */
|
|
int ReadData(void* buf, long sampleOffset, long len) const;
|
|
|
|
/* seek to an absolute offset within the WAV file */
|
|
int SeekAbs(long offset) { return fseek(mFP, offset, SEEK_SET); }
|
|
|
|
long GetDataOffset(void) const { return mSampleStart; }
|
|
unsigned long GetDataLen(void) const { return mSampleLen; }
|
|
const WAVEFORMATEX* GetWaveFormat(void) { return &mFormat; }
|
|
|
|
/* returns the #of bytes per sample (all channels) */
|
|
int GetBPS(void) const {
|
|
ASSERT(mFP != NULL);
|
|
return ((mFormat.wBitsPerSample+7)/8) * mFormat.nChannels;
|
|
}
|
|
|
|
private:
|
|
int SkipToHeader(unsigned long hdrID, unsigned long* pChunkLen);
|
|
|
|
enum { kWAVMinSize = 40 };
|
|
|
|
//void* mBuffer; // pointer to memory we need to delete
|
|
FILE* mFP; // currently open sound file
|
|
bool mDoClose; // do we own mFP?
|
|
|
|
long mFileStart; // so we can rewind the sound file
|
|
long mSampleStart; // offset in mem or file to sound samples
|
|
unsigned long mSampleLen; // length in bytes of audio sample section
|
|
|
|
WAVEFORMATEX mFormat; // WAV parameters (from mmsystem.h/mmreg.h)
|
|
};
|
|
|
|
#if 0 // contents of the WAVEFORMATEX struct; "cbSize" is not in WAV file
|
|
typedef struct tWAVEFORMATEX
|
|
{
|
|
WORD wFormatTag; /* format type */
|
|
WORD nChannels; /* number of channels (i.e. mono, stereo...) */
|
|
DWORD nSamplesPerSec; /* sample rate */
|
|
DWORD nAvgBytesPerSec; /* for buffer estimation */
|
|
WORD nBlockAlign; /* block size of data */
|
|
WORD wBitsPerSample; /* Number of bits per sample of mono data */
|
|
WORD cbSize; /* The count in bytes of the size of
|
|
extra information (after cbSize) */
|
|
} WAVEFORMATEX;
|
|
#endif
|
|
|
|
#endif /*UTIL_SOUNDFILE_H*/
|