audlinux_oss.cpp
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:22k
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: audlinux_oss.cpp,v 1.6.18.1 2004/07/09 02:01:42 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file,
- * are subject to the current version of the RealNetworks Public
- * Source License (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (the "RCSL") available at
- * http://www.helixcommunity.org/content/rcsl, in which case the RCSL
- * will apply. You may also obtain the license terms directly from
- * RealNetworks. You may not use this file except in compliance with
- * the RPSL or, if you have a valid RCSL with RealNetworks applicable
- * to this file, the RCSL. Please see the applicable RPSL or RCSL for
- * the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the
- * portions it created.
- *
- * This file, and the files included with this file, is distributed
- * and made available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY
- * KIND, EITHER EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS
- * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET
- * ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include <unistd.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <sys/ioctl.h>
- #include <stdio.h>
- #include <math.h>
- #include "ihxpckts.h"
- #include "hxtick.h"
- #include "hxprefs.h"
- #include "timeval.h"
- #include "hxthread.h"
- #include "audlinux_oss.h"
- #include "hxstrutl.h"
- #include "hxprefutil.h"
- //we can't set the PCM volume on the PowerPC. The sound driver
- //only lets up set the master volume.
- #ifdef __powerpc__
- # define HX_VOLUME SOUND_MIXER_VOLUME
- #else
- # define HX_VOLUME SOUND_MIXER_PCM
- #endif
- //------------------------------------------
- // Ctors and Dtors.
- //------------------------------------------
- CAudioOutLinux::CAudioOutLinux() :
- CAudioOutUNIX(),
- m_ulTickCount(0),
- m_ulLastBytesPlayed(0),
- m_ulLastTimeStamp(0),
- m_ulPausePosition(0),
- m_nDevID(NO_FILE_DESCRIPTOR),
- m_nMixerID(NO_FILE_DESCRIPTOR),
- m_bGetODelayFailed(TRUE),
- m_bGetOSpaceFailed(FALSE),
- m_bTestGetODelay(TRUE)
- {
- };
- CAudioOutLinux::~CAudioOutLinux()
- {
- //The mixer is opened independently of the audio device. Make sure
- //it is closed.
- _CloseMixer();
- };
- //-------------------------------------------------------
- // These Device Specific methods must be implemented
- // by the platform specific sub-classes.
- //-------------------------------------------------------
- INT16 CAudioOutLinux::_Imp_GetAudioFd(void)
- {
- return m_nDevID;
- }
- //Devic specific method to set the audio device characteristics. Sample rate,
- //bits-per-sample, etc.
- //Method *must* set member vars. m_unSampleRate and m_unNumChannels.
- HX_RESULT CAudioOutLinux::_SetDeviceConfig( const HXAudioFormat* pFormat )
- {
- if ( m_nDevID < 0 )
- return RA_AOE_DEVNOTOPEN;
- m_wBlockSize = m_ulBytesPerGran;
- //First, we want to determine the fragment size of the device buffer.
- //We will let the device determine the number of fragments after we
- //make sure that each fragment is no bigger than our block size.
- //The minimum block size for OSS is 16 bytes and the max is 2^0xf.
- //Basically, Log-base-two(m_wBlockSize)+1.
- int nPower = 0x4;
- while( (1<<nPower)<m_wBlockSize && nPower<0xf )
- {
- nPower++;
- }
- if( nPower > 4 )
- nPower--;
-
- //Frag info is 0xMMMMSSSS. Where
- //
- // MMMM is the total number of fragments. Set this to 7fff if you want
- // OSS to figure it out.
- // SSSS is the size of each fragment. The size is 2^0xSSSS.
- int nFragInfo = 0x7fff0000 | nPower;
- //Now set the fragment size.
- if (ioctl(m_nDevID, SNDCTL_DSP_SETFRAGMENT, &nFragInfo) == -1)
- {
- return (m_wLastError = RA_AOE_NOTENABLED);
- }
- //Now set the format. Either 8-bit or 16-bit audio is supported.
- int nSampleWidth = pFormat->uBitsPerSample;
- ULONG32 nSampleRate = pFormat->ulSamplesPerSec;
- int numChannels = pFormat->uChannels;
- int nFormat1 = 0;
- int nFormat2 = 0;
-
- if( nSampleWidth == 16)
- {
- nFormat1 = nFormat2 = AFMT_S16_NE;
- }
- else
- {
- nFormat1 = nFormat2 = AFMT_U8;
- }
-
- if(ioctl(m_nDevID, SNDCTL_DSP_SETFMT, &nFormat1) == -1)
- {
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- //Check and see if the device supports the format we tried to set.
- //If it didn't take our only other option is unsigned 8 bit. So, if
- //that is what the device returned just use it.
- if(nFormat1!=nFormat2 && nFormat1 != AFMT_U8 )
- {
- //Just try to set AFMT_U8.
- nFormat1 = AFMT_U8;
- if(ioctl(m_nDevID, SNDCTL_DSP_SETFMT, &nFormat1) == -1)
- {
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- if( nFormat1 != AFMT_U8 )
- {
- //No know format is supported.
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- }
- //If we went to 8-bit then
- if( nFormat1 == AFMT_U8 )
- {
- //AFMT_U8 is set.
- nSampleWidth = 8;
- }
- m_uSampFrameSize = nSampleWidth/8;
- if ( nSampleWidth != pFormat->uBitsPerSample )
- {
- ((HXAudioFormat*)pFormat)->uBitsPerSample = nSampleWidth;
- }
-
-
- // Set sampling rate, sample width, #channels.
- //
- // Make sure you set num channels before rate. If you don't it will
- // screw up SBPro devices. Your rate will actually be 1/2 of what
- // you think it is.
- //Set number of channels. Stereo or mono.
- if (ioctl(m_nDevID, SOUND_PCM_WRITE_CHANNELS, &numChannels) == -1)
- {
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- m_unNumChannels = numChannels;
- if ( numChannels != pFormat->uChannels )
- {
- ((HXAudioFormat*)pFormat)->uChannels = numChannels;
- }
- //Set the sample rate.
- if (ioctl(m_nDevID, SOUND_PCM_WRITE_RATE, &nSampleRate) == -1)
- {
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- if (nSampleRate == 0)
- {
- /*
- * Some drivers actually set the sample rate on the device, but
- * return 0 for the sample rate. On these platforms we just ignore
- * the return value and assume the sample rate is set to what was
- * requested.
- */
- nSampleRate = pFormat->ulSamplesPerSec;
- }
- m_unSampleRate = nSampleRate;
- if ( nSampleRate != pFormat->ulSamplesPerSec )
- {
- ((HXAudioFormat*)pFormat)->ulSamplesPerSec = nSampleRate;
- }
- //Find out if the user wants to support old OSS drivers that don't have,
- //or support well, the iocls needed for good syncing. SNDCTL_DSP_GETOSPACE and
- //SNDCTL_DSP_GETODELAY.
- IHXPreferences* pPreferences = NULL;
- if( m_pContext && HXR_OK == m_pContext->QueryInterface( IID_IHXPreferences, (void **) &pPreferences))
- {
- UINT32 nOldOSS = 0;
- if (HXR_OK == ReadPrefINT32(pPreferences, "SoundDriver", nOldOSS) &&
- (nOldOSS == 1))
- {
- m_bGetODelayFailed = TRUE;
- m_bGetOSpaceFailed = TRUE;
- m_bTestGetODelay = FALSE;
- }
- HX_RELEASE( pPreferences );
- }
- //for now, PowerPC linux doesn't support the following ioctl call
- //So, I will just make up some buffer size and live with it for
- //now. You won't be able to tell the difference until you turn
- //off threaded audio, then it will be block city!
- #ifndef __powerpc__
- audio_buf_info getYourInfoHere;
- if( !m_bGetOSpaceFailed )
- {
- //This call is to get how the device is set up after we have
- //set the sample rate etc. We use this to set up the buffers
- //we use for the fake pause/resume features.
- if (ioctl(m_nDevID, SNDCTL_DSP_GETOSPACE, &getYourInfoHere) == -1)
- {
- m_wLastError = RA_AOE_NOTENABLED;
- return m_wLastError;
- }
- m_ulDeviceBufferSize = getYourInfoHere.fragsize*getYourInfoHere.fragstotal;
- }
- else
- {
- //We don't have anyway to determine how big the buffer is.
- //just guess I guess.
- m_ulDeviceBufferSize = 8192*4;
- }
- #else
- m_ulDeviceBufferSize = 8192*4;
- #endif
- #ifdef _DEBUG
- fprintf( stderr, "Device Configured:n");
- fprintf( stderr, " Sample Rate: %dn", m_unSampleRate);
- fprintf( stderr, " Sample Width: %dn", nSampleWidth);
- fprintf( stderr, " Num channels: %dn", m_unNumChannels);
- fprintf( stderr, " Block size: %dn", m_wBlockSize);
- fprintf( stderr, " Device buffer size: %lun", m_ulDeviceBufferSize);
- fprintf( stderr, " Supports GETOSPACE: %dn", !m_bGetOSpaceFailed);
- fprintf( stderr, " Supports GETODELAY: %dn", !m_bGetODelayFailed);
- #endif
- return RA_AOE_NOERR;
- }
- void CAudioOutLinux::_SyncUpTimeStamps(ULONG32 lCount)
- {
- int bytes2 = 0;
- int theErr = -1;
- if( m_bTestGetODelay || !m_bGetODelayFailed )
- {
- HX_ASSERT(m_nDevID );
- theErr = ::ioctl(m_nDevID, SNDCTL_DSP_GETODELAY, &bytes2);
- }
- if( theErr != -1)
- {
- if (m_bTestGetODelay && (bytes2 != 0))
- {
- // We've now seen SNDCTL_DSP_GETODELAY return
- // a non-zero value so we know it is working
- m_bTestGetODelay = FALSE;
- m_bGetODelayFailed = FALSE;
- }
- if (!m_bTestGetODelay)
- {
- m_ulLastBytesPlayed = (UINT64)(m_ulTotalWritten+lCount-bytes2);
- m_ulLastTimeStamp = GetTickCount();
- }
- }
- else
- {
- //so we don't try it again.
- m_bGetODelayFailed = TRUE;
- m_bTestGetODelay = FALSE;
- }
- }
- //Device specific method to write bytes out to the audiodevice and return a
- //count of bytes written.
- HX_RESULT CAudioOutLinux::_WriteBytes( UCHAR* buffer, ULONG32 ulBuffLength, LONG32& lCount )
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- if( m_nDevID < 0 )
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- else
- {
- if( m_ulTickCount == 0 )
- m_ulTickCount = GetTickCount();
- lCount = ::write( m_nDevID, buffer, ulBuffLength);
- if( lCount < 0 )
- {
- //Error occurred.
- if( errno == EAGAIN )
- retCode = RA_AOE_NOERR;
- if( errno == EINTR )
- retCode = RA_AOE_DEVBUSY;
- }
- else
- {
- _SyncUpTimeStamps(lCount);
- }
- }
- return retCode;
- }
- //Device specific methods to open/close the mixer and audio devices.
- HX_RESULT CAudioOutLinux::_OpenAudio()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- //Set the tick count to zero
- m_ulTickCount = 0;
- m_ulLastTimeStamp = 0;
- m_ulLastBytesPlayed = 0;
- m_ulPausePosition = 0;
- //Check the environmental variable to let user overide default device.
- char *pszOverrideName = getenv( "AUDIO" ); /* Flawfinder: ignore */
- char szDevName[MAX_DEV_NAME]; /* Flawfinder: ignore */
-
- // Use defaults if no environment variable is set.
- if ( pszOverrideName && strlen(pszOverrideName)>0 )
- {
- SafeStrCpy( szDevName, pszOverrideName, MAX_DEV_NAME );
- }
- else
- {
- SafeStrCpy( szDevName, "/dev/dsp", MAX_DEV_NAME );
- }
-
- // Open the audio device if it isn't already open
- if ( m_nDevID < 0 )
- {
- m_nDevID = ::open( szDevName, O_WRONLY );
- }
-
- if ( m_nDevID < 0 )
- {
- #ifdef _DEBUG
- fprintf( stderr, "Failed to open audio(%s)!!!!!!! Code is: %d errno: %dn",
- szDevName, m_nDevID, errno );
- #endif
-
- //Error opening device.
- retCode = RA_AOE_BADOPEN;
- }
-
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutLinux::_CloseAudio()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- if( m_nDevID >= 0 )
- {
- ::close( m_nDevID );
- m_nDevID = NO_FILE_DESCRIPTOR;
- }
- else
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutLinux::_OpenMixer()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- if(!m_bMixerPresent)
- {
- //Let user override default device with environ variable.
- char *pszOverrideName = getenv( "MIXER" ); /* Flawfinder: ignore */
- char szDevCtlName[MAX_DEV_NAME]; /* Flawfinder: ignore */
-
- if (pszOverrideName && strlen(pszOverrideName)>0 )
- {
- SafeStrCpy( szDevCtlName , pszOverrideName, MAX_DEV_NAME );
- }
- else
- {
- SafeStrCpy( szDevCtlName , "/dev/mixer", MAX_DEV_NAME ); // default for volume
- }
-
- m_nMixerID = ::open( szDevCtlName, O_RDWR );
-
- if (m_nMixerID > 0)
- {
- m_bMixerPresent = 1;
- _Imp_GetVolume();
- }
- else
- {
- m_nMixerID = NO_FILE_DESCRIPTOR;
- m_bMixerPresent = 0;
- }
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutLinux::_CloseMixer()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- if( m_nMixerID >= 0 )
- {
- ::close( m_nMixerID );
- m_nMixerID = NO_FILE_DESCRIPTOR;
- }
-
- m_wLastError = retCode;
- return m_wLastError;
- }
- //Device specific method to reset device and return it to a state that it
- //can accept new sample rates, num channels, etc.
- HX_RESULT CAudioOutLinux::_Reset()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- m_ulPausePosition = 0;
-
- if ( m_nDevID < 0 )
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- else if( ::ioctl (m_nDevID, SOUND_PCM_RESET, 0) == -1 )
- {
- retCode = RA_AOE_GENERAL;
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- //Device specific method to get/set the devices current volume.
- UINT16 CAudioOutLinux::_GetVolume() const
- {
- int nVolume = 0;
- int nRetVolume = 0;
- int nLeftVolume = 0;
- int nRightVolume = 0;
-
- if (::ioctl( m_nMixerID, MIXER_READ(HX_VOLUME), &nVolume) < 0)
- {
- nRetVolume = 0;
- }
- nLeftVolume = (nVolume & 0x000000ff);
- nRightVolume = (nVolume & 0x0000ff00) >> 8;
- //Which one to use? Average them?
- nRetVolume = nLeftVolume ;
- return nRetVolume;
- }
- HX_RESULT CAudioOutLinux::_SetVolume(UINT16 unVolume)
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- int nNewVolume=0;
- //Set both left and right volumes.
- nNewVolume = (unVolume & 0xff) | ((unVolume &0xff) << 8);
-
- if (::ioctl( m_nMixerID, MIXER_WRITE(HX_VOLUME), &nNewVolume) < 0)
- {
- retCode = RA_AOE_NOTSUPPORTED;
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- //Device specific method to drain a device. This should play the remaining
- //bytes in the devices buffer and then return.
- HX_RESULT CAudioOutLinux::_Drain()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- if ( m_nDevID < 0 )
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- else if( ::ioctl (m_nDevID, SNDCTL_DSP_SYNC, 0) == -1 )
- {
- retCode = RA_AOE_GENERAL;
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- UINT64 CAudioOutLinux::_GetBytesActualyPlayed(void) const
- {
- /* Get current playback position in device DMA. */
- int bytes2 = 0;
- UINT64 ulTheAnswer = 0;
- //What versions of the linux kernel do we want to support?
- if( !m_bGetODelayFailed )
- {
- if( m_ulTotalWritten > 0 )
- {
- HX_ASSERT( m_unSampleRate!=0 && m_uSampFrameSize!=0 );
- ULONG32 ulTick = GetTickCount();
- //We need to update the timestamps every so often.
- //This make sure that if the XServer was blocked, and
- //we ran dry, that we re-sync up.
- if( (ulTick-m_ulLastTimeStamp)>200 )
- {
- ((CAudioOutLinux*)this)->_SyncUpTimeStamps();
- ulTick = GetTickCount();
- }
-
- ulTheAnswer = (UINT64)(m_ulLastBytesPlayed+
- ((float)(ulTick-m_ulLastTimeStamp)*
- (float)m_unNumChannels/1000.0*
- m_unSampleRate*m_uSampFrameSize) +0.5 );
- }
- }
- else
- {
- //We will assume that the error is because of an incomplete
- //implementation of the oss compatible driver. So, just
- //fake it with time stamps.
- if( m_ulTotalWritten > 0 )
- {
- ulTheAnswer = (UINT64)((float)(GetTickCount()-m_ulTickCount)*(float)m_unNumChannels/1000.0*m_unSampleRate*m_uSampFrameSize);
- ulTheAnswer += m_ulPausePosition;
- }
- }
- return ulTheAnswer;
- }
- //this must return the number of bytes that can be written without blocking.
- //Don't use SNDCTL_DSP_GETODELAY here as it can't compute that amount
- //correctly.
- HX_RESULT CAudioOutLinux::_GetRoomOnDevice(ULONG32& ulBytes) const
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- audio_buf_info stBuffInfo;
- int theErr=0;
- //What versions of the linux kernel do we want to support?
- if( m_bGetOSpaceFailed )
- {
- theErr = -1;
- }
- else
- {
- theErr = ::ioctl(m_nDevID, SNDCTL_DSP_GETOSPACE, &stBuffInfo);
- }
- if ( theErr != -1 )
- {
- ulBytes = stBuffInfo.bytes;
- }
- else
- {
- //So we just try it once.
- m_bGetOSpaceFailed = TRUE;
- ulBytes = m_ulDeviceBufferSize-(m_ulTotalWritten-_GetBytesActualyPlayed() );
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutLinux::_CheckFormat( const HXAudioFormat* pFormat )
- {
- int nBitsPerSample = pFormat->uBitsPerSample;
- int ulTmp = pFormat->ulSamplesPerSec;
- int nNumChannels = pFormat->uChannels;
- float fTmp = 0.0;
- HX_RESULT retCode = RA_AOE_NOERR;
-
- //Is the device already open?
- if( m_nDevID > 0 || RA_AOE_NOERR != _OpenAudio() )
- {
- retCode = RA_AOE_DEVBUSY;
- return retCode;
- }
- //See if the sample rate is supported.
- if (ioctl(m_nDevID, SOUND_PCM_WRITE_RATE, &ulTmp) == -1)
- {
- //Not quite the real error, but it is what we need to return.
- retCode = RA_AOE_DEVBUSY;
- goto donechecking;
- }
- if (ulTmp == 0)
- {
- /*
- * Some drivers actually set the sample rate on the device, but
- * return 0 for the sample rate. On these platforms we just ignore
- * the return value and assume the sample rate is set to what was
- * requested.
- */
- ulTmp = pFormat->ulSamplesPerSec;
- }
- //The ESS 1688 Sound card (not the ESS Solo-1) will return sample
- //rates that are close but not quite the ones we asked for (the
- //ESS Solo-1 doesn't play mono). I have see freqs like 44194
- //instead of 44100 (.2%) and 7984 instead of 8000 (.6%).
- //So, if we are close enough just say it is OK.
- //How about 1%?
- fTmp = (float)ulTmp/(float)pFormat->ulSamplesPerSec;
- if( fabs(1.0-fTmp) > .01 )
- {
- //It is NOT supported
- retCode = RA_AOE_BADFORMAT;
- goto donechecking;
- }
- //Check num channels.
- if (ioctl(m_nDevID, SOUND_PCM_WRITE_CHANNELS, &nNumChannels) == -1)
- {
- retCode = RA_AOE_DEVBUSY;
- goto donechecking;
- }
- else if ( nNumChannels != pFormat->uChannels )
- {
- retCode = RA_AOE_BADFORMAT;
- goto donechecking;
- }
- //Check the frame size.
- if (ioctl(m_nDevID, SNDCTL_DSP_SETFMT, &nBitsPerSample) == -1)
- {
- retCode = RA_AOE_DEVBUSY;
- goto donechecking;
- }
- else if ( nBitsPerSample != pFormat->uBitsPerSample )
- {
- retCode = RA_AOE_BADFORMAT;
- goto donechecking;
- }
- //Close the audio device.
- donechecking:
- _CloseAudio();
- m_wLastError = retCode;
- return retCode;
- }
- HX_RESULT CAudioOutLinux::_CheckSampleRate( ULONG32 ulSampleRate )
- {
- ULONG32 ulTmp = ulSampleRate;
- m_wLastError = RA_AOE_NOERR;
-
- //Is the device already open?
- if( m_nDevID > 0 || RA_AOE_NOERR != _OpenAudio() )
- {
- m_wLastError = RA_AOE_DEVBUSY;
- }
- else
- {
- //See if the sample rate is supported.
- if (ioctl(m_nDevID, SOUND_PCM_WRITE_RATE, &ulTmp) == -1)
- {
- //Not quite the real error, but it is what we need to return.
- m_wLastError = RA_AOE_DEVBUSY;
- }
- else if( ulSampleRate != ulTmp )
- {
- //It is NOT supported
- m_wLastError = RA_AOE_BADFORMAT;
- }
-
- _CloseAudio();
- }
-
- return m_wLastError;
- }
- HX_RESULT CAudioOutLinux::_Pause()
- {
- m_wLastError = HXR_OK;
- m_ulPausePosition = m_ulTotalWritten;
- m_ulTickCount = 0;
- m_ulLastTimeStamp = 0;
- return m_wLastError;
- }
- HX_RESULT CAudioOutLinux::_Resume()
- {
- m_wLastError = HXR_OK;
- if( m_ulTotalWritten > 0 )
- {
- m_ulTickCount = GetTickCount();
- m_ulLastTimeStamp = m_ulTickCount;
- }
- return m_wLastError;
- }