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itgmania212121/stepmania/src/arch/Sound/DSoundHelpers.cpp
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#include "global.h"
#include "DSoundHelpers.h"
#include "RageUtil.h"
#include "RageLog.h"
#include "archutils/Win32/DirectXHelpers.h"
#include "archutils/Win32/GetFileInformation.h"
#if defined(_WINDOWS)
#include <mmsystem.h>
#endif
#define DIRECTSOUND_VERSION 0x0700
#include <dsound.h>
#if defined(_MSC_VER)
#pragma comment(lib, "dsound.lib")
#endif
BOOL CALLBACK DSound::EnumCallback( LPGUID lpGuid, LPCSTR lpcstrDescription, LPCSTR lpcstrModule, LPVOID lpContext )
{
RString sLine = ssprintf( "DirectSound Driver: %s", lpcstrDescription );
if( lpcstrModule[0] )
{
sLine += ssprintf( " %s", lpcstrModule );
#ifndef _XBOX
RString sPath = FindSystemFile( lpcstrModule );
if( sPath != "" )
{
RString sVersion;
if( GetFileVersion(sPath, sVersion) )
sLine += ssprintf( " %s", sVersion.c_str() );
}
#endif
}
LOG->Info( "%s", sLine.c_str() );
return TRUE;
}
void DSound::SetPrimaryBufferMode()
{
#ifndef _XBOX
DSBUFFERDESC format;
memset( &format, 0, sizeof(format) );
format.dwSize = sizeof(format);
format.dwFlags = DSBCAPS_PRIMARYBUFFER;
format.dwBufferBytes = 0;
format.lpwfxFormat = NULL;
IDirectSoundBuffer *pBuffer;
HRESULT hr = this->GetDS()->CreateSoundBuffer( &format, &pBuffer, NULL );
if( FAILED(hr) )
{
LOG->Warn(hr_ssprintf(hr, "Couldn't create primary buffer"));
return;
}
WAVEFORMATEX waveformat;
memset( &waveformat, 0, sizeof(waveformat) );
waveformat.cbSize = 0;
waveformat.wFormatTag = WAVE_FORMAT_PCM;
waveformat.wBitsPerSample = 16;
waveformat.nChannels = 2;
waveformat.nSamplesPerSec = 44100;
waveformat.nBlockAlign = 4;
waveformat.nAvgBytesPerSec = waveformat.nSamplesPerSec * waveformat.nBlockAlign;
// Set the primary buffer's format
hr = IDirectSoundBuffer_SetFormat( pBuffer, &waveformat );
if( FAILED(hr) )
LOG->Warn( hr_ssprintf(hr, "SetFormat on primary buffer") );
DWORD got;
hr = pBuffer->GetFormat( &waveformat, sizeof(waveformat), &got );
if( FAILED(hr) )
LOG->Warn( hr_ssprintf(hr, "GetFormat on primary buffer") );
else if( waveformat.nSamplesPerSec != 44100 )
LOG->Warn( "Primary buffer set to %i instead of 44100", waveformat.nSamplesPerSec );
/*
* MS docs:
*
* When there are no sounds playing, DirectSound stops the mixer engine and halts DMA
* (direct memory access) activity. If your application has frequent short intervals of
* silence, the overhead of starting and stopping the mixer each time a sound is played
* may be worse than the DMA overhead if you kept the mixer active. Also, some sound
* hardware or drivers may produce unwanted audible artifacts from frequent starting and
* stopping of playback. If your application is playing audio almost continuously with only
* short breaks of silence, you can force the mixer engine to remain active by calling the
* IDirectSoundBuffer::Play method for the primary buffer. The mixer will continue to run
* silently.
*
* However, I just added the above code and I don't want to change more until it's tested.
*/
// pBuffer->Play( 0, 0, DSBPLAY_LOOPING );
pBuffer->Release();
#endif
}
DSound::DSound()
{
HRESULT hr;
if( FAILED( hr = CoInitialize(NULL) ) )
RageException::Throw( hr_ssprintf(hr, "CoInitialize") );
m_pDS = NULL;
}
RString DSound::Init()
{
HRESULT hr;
if( FAILED( hr = DirectSoundCreate(NULL, &m_pDS, NULL) ) )
return hr_ssprintf( hr, "DirectSoundCreate" );
#ifndef _XBOX
static bool bShownInfo = false;
if( !bShownInfo )
{
bShownInfo = true;
DirectSoundEnumerate( EnumCallback, 0 );
DSCAPS Caps;
Caps.dwSize = sizeof(Caps);
HRESULT hr;
if( FAILED(hr = m_pDS->GetCaps(&Caps)) )
{
LOG->Warn( hr_ssprintf(hr, "m_pDS->GetCaps failed") );
}
else
{
LOG->Info( "DirectSound sample rates: %i..%i %s", Caps.dwMinSecondarySampleRate, Caps.dwMaxSecondarySampleRate,
(Caps.dwFlags & DSCAPS_CONTINUOUSRATE)?"(continuous)":"" );
}
}
/* Try to set primary mixing privileges */
hr = m_pDS->SetCooperativeLevel( GetDesktopWindow(), DSSCL_PRIORITY );
#endif
SetPrimaryBufferMode();
return RString();
}
DSound::~DSound()
{
if( m_pDS != NULL )
m_pDS->Release();
CoUninitialize();
}
bool DSound::IsEmulated() const
{
#ifndef _XBOX
/* Don't bother wasting time trying to create buffers if we're
* emulated. This also gives us better diagnostic information. */
DSCAPS Caps;
Caps.dwSize = sizeof(Caps);
HRESULT hr;
if( FAILED(hr = m_pDS->GetCaps(&Caps)) )
{
LOG->Warn( hr_ssprintf(hr, "m_pDS->GetCaps failed") );
/* This is strange, so let's be conservative. */
return true;
}
return !!(Caps.dwFlags & DSCAPS_EMULDRIVER);
#else
return false;
#endif
}
DSoundBuf::DSoundBuf()
{
m_pBuffer = NULL;
m_pTempBuffer = NULL;
}
RString DSoundBuf::Init( DSound &ds, DSoundBuf::hw hardware,
int iChannels, int iSampleRate, int iSampleBits, int iWriteAhead )
{
m_iChannels = iChannels;
m_iSampleRate = iSampleRate;
m_iSampleBits = iSampleBits;
m_iWriteAhead = iWriteAhead * bytes_per_frame();
m_iVolume = -1; /* unset */
m_bBufferLocked = false;
m_iWriteCursorPos = m_iWriteCursor = m_iBufferBytesFilled = 0;
m_iExtraWriteahead = 0;
m_iLastPosition = 0;
m_bPlaying = false;
ZERO( m_iLastCursors );
/* The size of the actual DSound buffer. This can be large; we generally
* won't fill it completely. */
m_iBufferSize = 1024*64;
m_iBufferSize = max( m_iBufferSize, m_iWriteAhead );
WAVEFORMATEX waveformat;
memset( &waveformat, 0, sizeof(waveformat) );
waveformat.cbSize = 0;
waveformat.wFormatTag = WAVE_FORMAT_PCM;
bool bNeedCtrlFrequency = false;
if( m_iSampleRate == DYNAMIC_SAMPLERATE )
{
m_iSampleRate = 44100;
bNeedCtrlFrequency = true;
}
int bytes = m_iSampleBits / 8;
waveformat.wBitsPerSample = WORD(m_iSampleBits);
waveformat.nChannels = WORD(m_iChannels);
waveformat.nSamplesPerSec = DWORD(m_iSampleRate);
waveformat.nBlockAlign = WORD(bytes*m_iChannels);
waveformat.nAvgBytesPerSec = m_iSampleRate * bytes*m_iChannels;
/* Try to create the secondary buffer */
DSBUFFERDESC format;
memset( &format, 0, sizeof(format) );
format.dwSize = sizeof(format);
#ifdef _XBOX
format.dwFlags = 0;
#else
format.dwFlags = DSBCAPS_GETCURRENTPOSITION2 | DSBCAPS_GLOBALFOCUS | DSBCAPS_CTRLVOLUME;
#endif
#ifndef _XBOX
/* Don't use DSBCAPS_STATIC. It's meant for static buffers, and we
* only use streaming buffers. */
if( hardware == HW_HARDWARE )
format.dwFlags |= DSBCAPS_LOCHARDWARE;
else
format.dwFlags |= DSBCAPS_LOCSOFTWARE;
#endif
if( bNeedCtrlFrequency )
format.dwFlags |= DSBCAPS_CTRLFREQUENCY;
format.dwBufferBytes = m_iBufferSize;
#ifndef _XBOX
format.dwReserved = 0;
#else
DSMIXBINVOLUMEPAIR dsmbvp[8] =
{
{ DSMIXBIN_FRONT_LEFT, DSBVOLUME_MAX }, // left channel
{ DSMIXBIN_FRONT_RIGHT, DSBVOLUME_MAX }, // right channel
{ DSMIXBIN_FRONT_CENTER, DSBVOLUME_MAX }, // left channel
{ DSMIXBIN_FRONT_CENTER, DSBVOLUME_MAX }, // right channel
{ DSMIXBIN_BACK_LEFT, DSBVOLUME_MAX }, // left channel
{ DSMIXBIN_BACK_RIGHT, DSBVOLUME_MAX }, // right channel
{ DSMIXBIN_LOW_FREQUENCY, DSBVOLUME_MAX }, // left channel
{ DSMIXBIN_LOW_FREQUENCY, DSBVOLUME_MAX } // right channel
};
DSMIXBINS dsmb;
dsmb.dwMixBinCount = 8;
dsmb.lpMixBinVolumePairs = dsmbvp;
format.lpMixBins = &dsmb;
#endif
format.lpwfxFormat = &waveformat;
HRESULT hr = ds.GetDS()->CreateSoundBuffer( &format, &m_pBuffer, NULL );
if( FAILED(hr) )
return hr_ssprintf( hr, "CreateSoundBuffer failed (%i hz)", m_iSampleBits );
#ifndef _XBOX
/* I'm not sure this should ever be needed, but ... */
DSBCAPS bcaps;
bcaps.dwSize=sizeof(bcaps);
hr = m_pBuffer->GetCaps( &bcaps );
if( FAILED(hr) )
return hr_ssprintf( hr, "m_pBuffer->GetCaps" );
if( int(bcaps.dwBufferBytes) != m_iBufferSize )
{
LOG->Warn( "bcaps.dwBufferBytes (%i) != m_iBufferSize(%i); adjusting", bcaps.dwBufferBytes, m_iBufferSize );
m_iBufferSize = bcaps.dwBufferBytes;
m_iWriteAhead = min( m_iWriteAhead, m_iBufferSize );
}
if( !(bcaps.dwFlags & DSBCAPS_CTRLVOLUME) )
LOG->Warn( "Sound channel missing DSBCAPS_CTRLVOLUME" );
if( !(bcaps.dwFlags & DSBCAPS_GETCURRENTPOSITION2) )
LOG->Warn( "Sound channel missing DSBCAPS_GETCURRENTPOSITION2" );
DWORD got;
hr = m_pBuffer->GetFormat( &waveformat, sizeof(waveformat), &got );
if( FAILED(hr) )
LOG->Warn( hr_ssprintf(hr, "GetFormat on secondary buffer") );
else if( (int) waveformat.nSamplesPerSec != m_iSampleRate )
LOG->Warn( "Secondary buffer set to %i instead of %i", waveformat.nSamplesPerSec, m_iSampleRate );
#endif
m_pTempBuffer = new char[m_iBufferSize];
return RString();
}
void DSoundBuf::SetSampleRate( int hz )
{
m_iSampleRate = hz;
HRESULT hr = m_pBuffer->SetFrequency( hz );
if( FAILED(hr) )
RageException::Throw( hr_ssprintf(hr, "m_pBuffer->SetFrequency(%i)", hz) );
}
void DSoundBuf::SetVolume( float fVolume )
{
ASSERT_M( fVolume >= 0 && fVolume <= 1, ssprintf("%f",fVolume) );
if( fVolume == 0 )
fVolume = 0.001f; // fix log10f(0) == -INF
float iVolumeLog2 = log10f(fVolume) / log10f(2); /* vol log 2 */
/* Volume is a multiplier; SetVolume wants attenuation in hundredths of a decibel. */
const int iNewVolume = max( int(1000 * iVolumeLog2), DSBVOLUME_MIN );
if( m_iVolume == iNewVolume )
return;
HRESULT hr = m_pBuffer->SetVolume( iNewVolume );
if( FAILED(hr) )
{
static bool bWarned = false;
if( !bWarned )
LOG->Warn( hr_ssprintf(hr, "DirectSoundBuffer::SetVolume(%i) failed", iNewVolume) );
bWarned = true;
return;
}
m_iVolume = iNewVolume;
}
/* Determine if "pos" is between "start" and "end", for a circular buffer. Note that
* a start/end pos is ambiguous when start == end; it can mean that the buffer is
* completely full or completely empty; this function treats it as completely empty. */
static bool contained( int iStart, int iEnd, int iPos )
{
if( iEnd >= iStart ) /* iStart ... iPos ... iEnd */
return iStart <= iPos && iPos < iEnd;
else
return iPos >= iStart || iPos < iEnd;
}
DSoundBuf::~DSoundBuf()
{
if( m_pBuffer != NULL )
m_pBuffer->Release();
delete [] m_pTempBuffer;
}
/* Check to make sure that, given the current writeahead and chunksize, we're
* capable of filling the prefetch region entirely. If we aren't, increase
* the writeahead. If this happens, we're underruning. */
void DSoundBuf::CheckWriteahead( int iCursorStart, int iCursorEnd )
{
/* If we're in a recovering-from-underrun state, stop. */
if( m_iExtraWriteahead )
return;
/* If the driver is requesting an unreasonably large prefetch, ignore it entirely.
* Some drivers seem to give broken write cursors sporadically, requesting that
* almost the entire buffer be filled. There's no reason a driver should ever need
* more than 8k frames of writeahead. */
int iPrefetch = iCursorEnd - iCursorStart;
wrap( iPrefetch, m_iBufferSize );
if( iPrefetch >= 1024*32 )
{
static bool bLogged = false;
if( bLogged )
return;
bLogged = true;
LOG->Warn("Sound driver is requesting an overly large prefetch: wants %i (cursor at %i..%i), writeahead not adjusted",
iPrefetch / bytes_per_frame(), iCursorStart, iCursorEnd );
return;
}
if( m_iWriteAhead >= iPrefetch )
return;
/* We need to increase the writeahead. */
LOG->Trace("insufficient writeahead: wants %i (cursor at %i..%i), writeahead adjusted from %i to %i",
iPrefetch / bytes_per_frame(), iCursorStart, iCursorEnd, m_iWriteAhead, iPrefetch );
m_iWriteAhead = iPrefetch;
}
/* Figure out if we've underrun, and act if appropriate. */
void DSoundBuf::CheckUnderrun( int iCursorStart, int iCursorEnd )
{
/* If the buffer is full, we can't be underrunning. */
if( m_iBufferBytesFilled >= m_iBufferSize )
return;
/* If nothing is expected to be filled, we can't underrun. */
if( iCursorStart == iCursorEnd )
return;
/* If we're already in a recovering-from-underrun state, stop. */
if( m_iExtraWriteahead )
return;
int iFirstByteFilled = m_iWriteCursor - m_iBufferBytesFilled;
wrap( iFirstByteFilled, m_iBufferSize );
/* If the end of the play cursor has data, we haven't underrun. */
if( m_iBufferBytesFilled > 0 && contained(iFirstByteFilled, m_iWriteCursor, iCursorEnd) )
return;
/* Extend the writeahead to force fill as much as required to stop underrunning.
* This has a major benefit: if we havn't skipped so long we've passed a whole
* buffer (64k = ~350ms), this doesn't break stride. We'll skip forward, but
* the beat won't be lost, which is a lot easier to recover from in play. */
/* XXX: If this happens repeatedly over a period of time, increase writeahead. */
/* XXX: What was I doing here? This isn't working. We want to know the writeahead
* value needed to fill from the current iFirstByteFilled all the way to iCursorEnd. */
// int iNeededWriteahead = (iCursorStart + writeahead) - m_iWriteCursor;
int iNeededWriteahead = iCursorEnd - iFirstByteFilled;
wrap( iNeededWriteahead, m_iBufferSize );
if( iNeededWriteahead > m_iWriteAhead )
{
m_iExtraWriteahead = iNeededWriteahead - m_iWriteAhead;
m_iWriteAhead = iNeededWriteahead;
}
int iMissedBy = iCursorEnd - m_iWriteCursor;
wrap( iMissedBy, m_iBufferSize );
RString s = ssprintf( "underrun: %i..%i (%i) filled but cursor at %i..%i; missed it by %i",
iFirstByteFilled, m_iWriteCursor, m_iBufferBytesFilled, iCursorStart, iCursorEnd, iMissedBy );
if( m_iExtraWriteahead )
s += ssprintf( "; extended writeahead by %i to %i", m_iExtraWriteahead, m_iWriteAhead );
s += "; last: ";
for( int i = 0; i < 4; ++i )
s += ssprintf( "%i, %i; ", m_iLastCursors[i][0], m_iLastCursors[i][1] );
LOG->Trace( "%s", s.c_str() );
}
bool DSoundBuf::get_output_buf( char **pBuffer, unsigned *pBufferSize, int iChunksize )
{
ASSERT( !m_bBufferLocked );
iChunksize *= bytes_per_frame();
DWORD iCursorStart, iCursorEnd;
HRESULT result;
/* It's easiest to think of the cursor as a block, starting and ending at
* the two values returned by GetCurrentPosition, that we can't write to. */
result = m_pBuffer->GetCurrentPosition( &iCursorStart, &iCursorEnd );
#ifndef _XBOX
if( result == DSERR_BUFFERLOST )
{
m_pBuffer->Restore();
result = m_pBuffer->GetCurrentPosition( &iCursorStart, &iCursorEnd );
}
if( result != DS_OK )
{
LOG->Warn( hr_ssprintf(result, "DirectSound::GetCurrentPosition failed") );
return false;
}
#endif
memmove( &m_iLastCursors[0][0], &m_iLastCursors[1][0], sizeof(int)*6 );
m_iLastCursors[3][0] = iCursorStart;
m_iLastCursors[3][1] = iCursorEnd;
/* Some cards (Creative AudioPCI) have a no-write area even when not playing. I'm not
* sure what that means, but it breaks the assumption that we can fill the whole writeahead
* when prebuffering. */
if( !m_bPlaying )
iCursorEnd = iCursorStart;
/*
* Some cards (Game Theater XP 7.1 hercwdm.sys 5.12.01.4101 [466688b, 01-10-2003])
* have odd behavior when starting a sound: the start/end cursors go:
*
* 0,0 end cursor forced equal to start above (normal)
* 4608, 1764 end cursor trailing the write cursor; except with old emulated
* WaveOut devices, this shouldn't happen; it indicates that the
* driver expects almost the whole buffer to be filled. Also, the
* play cursor is too far ahead from the last call for the amount
* of actual time passed.
* 704, XXX start cursor moves back to where it should be. I don't have an exact
* end cursor position, but in general from now on it stays about 5kb
* ahead of start (which is where it should be).
*
* The second call is completely wrong; both the start and end cursors are meaningless.
* Detect this: if the end cursor is close behind the start cursor, don't do anything.
* (We can't; we have no idea what the cursors actually are.)
*/
{
int iPrefetch = iCursorEnd - iCursorStart;
wrap( iPrefetch, m_iBufferSize );
if( m_iBufferSize - iPrefetch < 1024*4 )
{
LOG->Trace( "Strange DirectSound cursor ignored: %i..%i", iCursorStart, iCursorEnd );
return false;
}
}
/* Update m_iBufferBytesFilled. */
{
int iFirstByteFilled = m_iWriteCursor - m_iBufferBytesFilled;
wrap( iFirstByteFilled, m_iBufferSize );
/* The number of bytes that have been played since the last time we got here: */
int bytes_played = iCursorStart - iFirstByteFilled;
wrap( bytes_played, m_iBufferSize );
m_iBufferBytesFilled -= bytes_played;
m_iBufferBytesFilled = max( 0, m_iBufferBytesFilled );
if( m_iExtraWriteahead )
{
int used = min( m_iExtraWriteahead, bytes_played );
RString s = ssprintf("used %i of %i (%i..%i)", used, m_iExtraWriteahead, iCursorStart, iCursorEnd );
s += "; last: ";
for( int i = 0; i < 4; ++i )
s += ssprintf( "%i, %i; ", m_iLastCursors[i][0], m_iLastCursors[i][1] );
LOG->Trace("%s", s.c_str());
m_iWriteAhead -= used;
m_iExtraWriteahead -= used;
}
}
CheckWriteahead( iCursorStart, iCursorEnd );
CheckUnderrun( iCursorStart, iCursorEnd );
/* If we already have enough bytes written ahead, stop. */
if( m_iBufferBytesFilled >= m_iWriteAhead )
return false;
/* If we don't have enough free space in the buffer to fill a whole chunk, stop. */
if( m_iBufferSize - m_iBufferBytesFilled < iChunksize )
return false;
int iNumBytesEmpty = m_iWriteAhead - m_iBufferBytesFilled;
iNumBytesEmpty = QuantizeUp( iNumBytesEmpty, iChunksize );
// LOG->Trace("gave %i at %i (%i, %i) %i filled", iNumBytesEmpty, m_iWriteCursor, cursor, write, m_iBufferBytesFilled);
/* Lock the audio buffer. */
result = m_pBuffer->Lock( m_iWriteCursor, iNumBytesEmpty, (LPVOID *) &m_pLockedBuf1, (DWORD *) &m_iLockedSize1, (LPVOID *) &m_pLockedBuf2, (DWORD *) &m_iLockedSize2, 0 );
#ifndef _XBOX
if( result == DSERR_BUFFERLOST )
{
m_pBuffer->Restore();
result = m_pBuffer->Lock( m_iWriteCursor, iNumBytesEmpty, (LPVOID *) &m_pLockedBuf1, (DWORD *) &m_iLockedSize1, (LPVOID *) &m_pLockedBuf2, (DWORD *) &m_iLockedSize2, 0 );
}
#endif
if( result != DS_OK )
{
LOG->Warn( hr_ssprintf(result, "Couldn't lock the DirectSound buffer.") );
return false;
}
*pBuffer = m_pTempBuffer;
*pBufferSize = m_iLockedSize1 + m_iLockedSize2;
m_iWriteCursor += iNumBytesEmpty;
if( m_iWriteCursor >= m_iBufferSize )
m_iWriteCursor -= m_iBufferSize;
m_iBufferBytesFilled += iNumBytesEmpty;
m_iWriteCursorPos += iNumBytesEmpty / bytes_per_frame();
m_bBufferLocked = true;
return true;
}
void DSoundBuf::release_output_buf( char *pBuffer, unsigned iBufferSize )
{
memcpy( m_pLockedBuf1, pBuffer, m_iLockedSize1 );
memcpy( m_pLockedBuf2, pBuffer+m_iLockedSize1, m_iLockedSize2 );
m_pBuffer->Unlock( m_pLockedBuf1, m_iLockedSize1, m_pLockedBuf2, m_iLockedSize2 );
m_bBufferLocked = false;
}
int64_t DSoundBuf::GetPosition() const
{
DWORD iCursor, iJunk;
HRESULT hr = m_pBuffer->GetCurrentPosition( &iCursor, &iJunk );
#ifndef _XBOX
if( hr == DSERR_BUFFERLOST )
{
m_pBuffer->Restore();
hr = m_pBuffer->GetCurrentPosition( &iCursor, &iJunk );
}
if( hr != DS_OK )
{
LOG->Warn( hr_ssprintf(hr, "DirectSound::GetPosition failed") );
iCursor = 0;
}
#endif
/* This happens occasionally on "Realtek AC97 Audio". */
if( (int) iCursor == m_iBufferSize )
iCursor = 0;
ASSERT_M( (int) iCursor < m_iBufferSize, ssprintf("%i, %i", iCursor, m_iBufferSize) );
int iCursorFrames = int(iCursor) / bytes_per_frame();
int iWriteCursorFrames = m_iWriteCursor / bytes_per_frame();
int iFramesBehind = iWriteCursorFrames - iCursorFrames;
/* iFramesBehind will be 0 if we're called before the buffer starts playing:
* both iWriteCursorFrames and iCursorFrames will be 0. */
if( iFramesBehind < 0 )
iFramesBehind += buffersize_frames(); /* unwrap */
int64_t iRet = m_iWriteCursorPos - iFramesBehind;
/* Failsafe: never return a value smaller than we've already returned.
* This can happen once in a while in underrun conditions. */
iRet = max( m_iLastPosition, iRet );
m_iLastPosition = iRet;
return iRet;
}
void DSoundBuf::Play()
{
if( m_bPlaying )
return;
m_pBuffer->Play( 0, 0, DSBPLAY_LOOPING );
m_bPlaying = true;
}
void DSoundBuf::Stop()
{
if( !m_bPlaying )
return;
m_pBuffer->Stop();
m_pBuffer->SetCurrentPosition(0);
m_iWriteCursorPos = m_iWriteCursor = m_iBufferBytesFilled = 0;
m_iLastPosition = 0;
m_iWriteAhead -= m_iExtraWriteahead;
m_iExtraWriteahead = 0;
/* When stopped and rewound, the play and write cursors should both be 0. */
/* This isn't true on some broken cards. */
// DWORD iPlay, iWrite;
// m_pBuffer->GetCurrentPosition( &iPlay, &iWrite );
// ASSERT_M( iPlay == 0 && iWrite == 0, ssprintf("%i, %i", iPlay, iWrite) );
m_bPlaying = false;
}
/*
* (c) 2002-2004 Glenn Maynard
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, and/or sell copies of the Software, and to permit persons to
* whom the Software is furnished to do so, provided that the above
* copyright notice(s) and this permission notice appear in all copies of
* the Software and that both the above copyright notice(s) and this
* permission notice appear in supporting documentation.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
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