audhpux.cpp
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上传日期:2007-06-06
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- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 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
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (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.
- *
- * 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 "audhpux.h"
- #include "ihxpckts.h"
- #include "hxtick.h"
- #include "hxprefs.h"
- #include "hxstrutl.h"
- #include <unistd.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <sys/ioctl.h>
- #include <stdio.h>
- #include <math.h>
- #include <sys/audio.h>
- #define MAX_DEV_NAME 256
- //------------------------------------------
- // Ctors and Dtors.
- //------------------------------------------
- CAudioOutHPUX::CAudioOutHPUX() :
- 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(FALSE),
- m_bGetOSpaceFailed(FALSE),
- m_nLastVolume(0),
- m_nMinVolume(0),
- m_nMaxVolume(0)
- {
- };
- CAudioOutHPUX::~CAudioOutHPUX()
- {
- //The mixer is opened independently of the audio device. Make sure
- //it is celosed.
- _CloseAudio();
- };
- //-------------------------------------------------------
- // These Device Specific methods must be implemented
- // by the platform specific sub-classes.
- //-------------------------------------------------------
- INT16 CAudioOutHPUX::_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 CAudioOutHPUX::_SetDeviceConfig( const HXAudioFormat* pFormat )
- {
- if ( !pFormat )
- {
- pFormat = &m_lastFormat;
- }
- else
- {
- m_lastFormat = *pFormat;
- }
- m_lastFormat = *pFormat;
- if ( m_nDevID < 0 )
- return RA_AOE_DEVNOTOPEN;
- int nFragSize = 8192;
- while (-1 != ioctl(m_nDevID, AUDIO_SET_TXBUFSIZE, nFragSize))
- {
- nFragSize <<= 1;
- }
- ioctl(m_nDevID, AUDIO_GET_TXBUFSIZE, &m_ulDeviceBufferSize);
- //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 = AUDIO_FORMAT_LINEAR16BIT;
- }
- else
- {
- nFormat1 = nFormat2 = AUDIO_FORMAT_LINEAR8BIT;
- }
-
- if(ioctl(m_nDevID, AUDIO_SET_DATA_FORMAT, nFormat1) == -1)
- {
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- m_uSampFrameSize = nSampleWidth/8;
- if ( nSampleWidth != pFormat->uBitsPerSample )
- {
- ((HXAudioFormat*)pFormat)->uBitsPerSample = nSampleWidth;
- }
- //Set number of channels. Stereo or mono.
- if (ioctl(m_nDevID, AUDIO_SET_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, AUDIO_SET_SAMPLE_RATE, nSampleRate) == -1)
- {
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- m_unSampleRate = nSampleRate;
- if ( nSampleRate != pFormat->ulSamplesPerSec )
- {
- ((HXAudioFormat*)pFormat)->ulSamplesPerSec = nSampleRate;
- }
- #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, " Support for old OSS: %dn", m_bGetOSpaceFailed);
- #endif
- return RA_AOE_NOERR;
- }
- void CAudioOutHPUX::_SyncUpTimeStamps(ULONG32 lCount)
- {
- int bytes2 = 0;
- int theErr = -1;
- audio_status astatus;
- if( !m_bGetODelayFailed )
- {
- theErr = ::ioctl(m_nDevID, AUDIO_GET_STATUS, &astatus);
- }
- if( theErr != -1)
- {
- m_ulLastBytesPlayed = (ULONG32)(m_ulTotalWritten+lCount-astatus.transmit_buffer_count);
- m_ulLastTimeStamp = GetTickCount();
- }
- else
- {
- //so we don't try it again.
- m_bGetODelayFailed = TRUE;
- }
- }
- //Device specific method to write bytes out to the audiodevice and return a
- //count of bytes written.
- HX_RESULT CAudioOutHPUX::_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 CAudioOutHPUX::_OpenAudio()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- // Open the audio device if it isn't already open
- if ( -1 == m_nDevID )
- {
-
- //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/audio", MAX_DEV_NAME );
- }
- //Set the tick count to zero
- m_ulTickCount = 0;
- m_ulLastTimeStamp = 0;
- m_ulLastBytesPlayed = 0;
- m_ulPausePosition = 0;
- m_nDevID = ::open( szDevName, O_WRONLY );
- }
-
- if ( m_nDevID < 0 )
- {
- #ifdef _DEBUG
- fprintf( stderr, "Failed to open audio!!!!!!! Code is: %d errno: %dn",
- m_nDevID, errno );
- #endif
-
- //Error opening device.
- retCode = RA_AOE_BADOPEN;
- }
-
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutHPUX::_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 CAudioOutHPUX::_OpenMixer()
- {
- if (-1 == m_nDevID)
- _OpenAudio(); // control the level through the audio device
- // get and store the current volume
- struct audio_describe adescribe;
- if (-1 != ioctl(m_nDevID, AUDIO_DESCRIBE, &adescribe)) {
- m_nMinVolume = adescribe.min_transmit_gain;
- m_nMaxVolume = adescribe.max_transmit_gain;
- }
-
- struct audio_gain gainsettings;
- if (-1 != ioctl(m_nDevID, AUDIO_GET_GAINS, &gainsettings))
- {
- m_nLastVolume = (gainsettings.cgain[0].transmit_gain -
- m_nMinVolume) * 100 /
- (m_nMaxVolume - m_nMinVolume);
- }
-
- m_bMixerPresent=TRUE;
-
- return RA_AOE_NOERR;
- }
- HX_RESULT CAudioOutHPUX::_CloseMixer()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- m_wLastError = retCode;
- m_bMixerPresent = FALSE;
- 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 CAudioOutHPUX::_Reset()
- {
- ioctl(m_nDevID, AUDIO_RESET, RESET_TX_BUF);
-
- _CloseAudio();
- UINT32 ulTickCount = m_ulTickCount;
- UINT32 ulLastTimeStamp = m_ulLastTimeStamp;
- UINT32 ulLastBytesPlayed = m_ulLastBytesPlayed;
- UINT32 ulPausePosition = m_ulPausePosition;
- _OpenAudio();
- m_ulTickCount = ulTickCount;
- m_ulLastTimeStamp = ulLastTimeStamp;
- m_ulLastBytesPlayed = ulLastBytesPlayed;
- m_ulPausePosition = ulPausePosition;
- _SetDeviceConfig(NULL);
- m_ulPausePosition = 0;
- HX_RESULT retCode = RA_AOE_NOERR;
- m_wLastError = retCode;
-
- // verify that this worked
- audio_status astatus;
- ioctl(m_nDevID, AUDIO_GET_STATUS, &astatus);
-
- return m_wLastError;
- }
- //Device specific method to get/set the devices current volume.
- UINT16 CAudioOutHPUX::_GetVolume() const
- {
- _OpenMixer();
-
- return m_nLastVolume;
- }
- HX_RESULT CAudioOutHPUX::_SetVolume(UINT16 unVolume)
- {
- m_nLastVolume = unVolume;
- HX_RESULT retCode = RA_AOE_NOERR;
- struct audio_gain gainsettings;
- memset(&gainsettings, 0, sizeof(audio_gain));
- gainsettings.channel_mask = AUDIO_CHANNEL_LEFT | AUDIO_CHANNEL_RIGHT;
- gainsettings.cgain[0].transmit_gain = (INT32)unVolume * (m_nMaxVolume - m_nMinVolume) / 100 + m_nMinVolume;
- gainsettings.cgain[1].transmit_gain = (INT32)unVolume * (m_nMaxVolume - m_nMinVolume) / 100 + m_nMinVolume;
-
- if (::ioctl( m_nDevID, AUDIO_SET_GAINS, &gainsettings) < 0)
- {
- retCode = RA_AOE_NOTENABLED;
- }
- 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 CAudioOutHPUX::_Drain()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- m_wLastError = retCode;
- return m_wLastError;
- }
- ULONG32 CAudioOutHPUX::_GetBytesActualyPlayed(void) const
- {
- /* Get current playback position in device DMA. */
- int bytes2 = 0;
- ULONG32 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 )
- {
- ((CAudioOutHPUX*)this)->_SyncUpTimeStamps(); // ug... constness of method prohibits this call somtimes
- ulTick = GetTickCount();
- }
-
- ulTheAnswer = (ULONG32)(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 = (ULONG32)((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 CAudioOutHPUX::_GetRoomOnDevice(ULONG32& ulBytes) const
- {
- audio_status astatus;
- int theErr;
-
- theErr = ioctl(m_nDevID, AUDIO_GET_STATUS, &astatus);
-
- if( theErr != -1)
- {
- ulBytes = m_ulDeviceBufferSize - astatus.transmit_buffer_count;
- }
- return RA_AOE_NOERR;
- }
- HX_RESULT CAudioOutHPUX::_CheckFormat( const HXAudioFormat* pFormat )
- {
- return RA_AOE_NOERR;
- }
- HX_RESULT CAudioOutHPUX::_CheckSampleRate( ULONG32 ulSampleRate )
- {
- return m_wLastError = RA_AOE_NOERR;
- }
- HX_RESULT CAudioOutHPUX::_Pause()
- {
- // ioctl(m_nDevID, AUDIO_PAUSE, AUDIO_TRANSMIT);
-
- m_wLastError = HXR_OK;
- m_ulPausePosition = m_ulTotalWritten;
- m_ulTickCount = 0;
- m_ulLastTimeStamp = 0;
- return m_wLastError;
- }
- HX_RESULT CAudioOutHPUX::_Resume()
- {
- // ioctl(m_nDevID, AUDIO_RESUME, AUDIO_TRANSMIT);
- m_wLastError = HXR_OK;
-
- if( m_ulTotalWritten > 0 )
- {
- m_ulTickCount = GetTickCount();
- m_ulLastTimeStamp = m_ulTickCount;
- }
- return m_wLastError;
- }