audirix.cpp
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:13k
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: audirix.cpp,v 1.1.1.1.50.1 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 "audirix.h"
- #include "ihxpckts.h"
- #include <unistd.h>
- #include <fcntl.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <stdio.h>
- #include <math.h>
- //------------------------------------------
- // Ctors and Dtors.
- //------------------------------------------
- CAudioOutIrix::CAudioOutIrix() :
- CAudioOutUNIX(),
- m_pALPort(NULL),
- m_nDevID(NO_FILE_DESCRIPTOR),
- m_nMixerID(NO_FILE_DESCRIPTOR)
- {
- };
- CAudioOutIrix::~CAudioOutIrix()
- {
- };
- //-------------------------------------------------------
- // These Device Specific methods must be implemented
- // by the platform specific sub-classes.
- //-------------------------------------------------------
- INT16 CAudioOutIrix::_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 CAudioOutIrix::_SetDeviceConfig( const HXAudioFormat* pFormat )
- {
- if ( m_nDevID < 0 )
- return RA_AOE_DEVNOTOPEN;
- m_wBlockSize = m_ulBytesPerGran;
- //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;
- m_unNumChannels = numChannels;
- m_uSampFrameSize = nSampleWidth / 8;
- m_unSampleRate = nSampleRate;
- //Get a new alConfig so we can set the port.
- ALconfig pALConfig = ALnewconfig();
- if( !pALConfig )
- {
- #ifdef _DEBUG
- fprintf( stderr, "Can't Alloc new Config.n");
- #endif
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
-
- //Set the format to PCM two compliment integer data.
- ALsetsampfmt( pALConfig, AL_SAMPFMT_TWOSCOMP );
-
- if( nSampleWidth == 16)
- {
- ALsetwidth( pALConfig, AL_SAMPLE_16 );
- }
- else
- {
- ALsetwidth( pALConfig, AL_SAMPLE_8 );
- }
-
- if(ALsetchannels( pALConfig, numChannels) < 0 )
- {
- #ifdef _DEBUG
- fprintf( stderr, "Can't set number of channels.n");
- #endif
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- //Set sample rate. For now we are assuming that they
- //are using the default analog out device.
- //XXXgfw we should query for the active output device
- // and use that one instead.
- //Now let do the rate.
- long params[4];
- params[0] = AL_OUTPUT_RATE;
- params[1] = nSampleRate;
- #ifdef _DEBUG
- fprintf( stderr, "Trying to set a rate of: %dn", nSampleRate );
- #endif
- if( ALsetparams( AL_DEFAULT_DEVICE, params, 2 ) < 0 )
- {
- #ifdef _DEBUG
- fprintf( stderr, "alSetParams has failed: %d n", errno);
- #endif
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- if( params[1] != nSampleRate )
- {
- #ifdef _DEBUG
- fprintf( stderr, "Invalid rate specified.n");
- #endif
- return ( m_wLastError = RA_AOE_NOTENABLED );
- }
- //In Irix we can pick our own buffer size. Yeah!
- //For now, however, lets just leave the defualt which
- //is 50,000 samples big.
- int nTmp = ALgetqueuesize( pALConfig );
- ALsetqueuesize( pALConfig, nTmp );
- #ifdef _DEBUG
- fprintf( stderr, "Irix is using: %d sample frames to buffer.n", nTmp );
- #endif
- m_ulDeviceBufferSize = nTmp*m_uSampFrameSize*m_unNumChannels;
- //Now set the ports configuration.
- ALcloseport( m_pALPort );
- m_pALPort = ALopenport( "RealPlayer", "w", pALConfig );
- // if ( ALsetconfig( m_pALPort, pALConfig ) == -1 )
- // {
- //#ifdef _DEBUG
- // fprintf( stderr, "Can not set the ports configuration.n" );
- // fprintf( stderr, "errno: %d.n", oserror() );
- //#endif
- // return ( m_wLastError = RA_AOE_NOTENABLED );
- // }
- //XXXgfw
- ALfreeconfig( pALConfig );
-
- #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, " Device buff size: %lun", m_ulDeviceBufferSize);
- #endif
- return RA_AOE_NOERR;
- }
- //Device specific method to write bytes out to the audiodevice and return a
- //count of bytes written.
- HX_RESULT CAudioOutIrix::_WriteBytes( UCHAR* buffer, ULONG32 ulBuffLength, LONG32& lCount )
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- if( m_nDevID < 0 )
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- else
- {
- lCount = ulBuffLength;
- int nFrameCount = ulBuffLength/m_uSampFrameSize;
- ALwritesamps( m_pALPort, buffer, nFrameCount );
- }
- return retCode;
- }
- //Device specific methods to open/close the mixer and audio devices.
- HX_RESULT CAudioOutIrix::_OpenAudio()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- // Open the audio device if it isn't already open
- if ( m_nDevID < 0 )
- {
- //Open an audio port and set the config later.
- m_pALPort = ALopenport( "RealPlayer", "w", 0 );
- if( m_pALPort == 0 )
- {
- #ifdef _DEBUG
- fprintf( stderr, "Can't open port. oserror is: %dn",
- oserror() );
- #endif
- }
- #ifdef _DEBUG
- fprintf( stderr, "Got a port: %pn", m_pALPort );
- #endif
-
- //Grab a file descriptor so we can select on it.
- if( NULL != m_pALPort )
- m_nDevID = ALgetfd( m_pALPort );
- }
-
- if ( m_nDevID < 0 || NULL == m_pALPort )
- {
- #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 CAudioOutIrix::_CloseAudio()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- if( m_nDevID >= 0 )
- {
- ALcloseport( m_pALPort );
- m_pALPort = NULL;
- m_nDevID = NO_FILE_DESCRIPTOR;
- }
- else
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutIrix::_OpenMixer()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- //We always have a mixer on Irix.
- m_bMixerPresent = 1;
- _Imp_GetVolume();
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutIrix::_CloseMixer()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- 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 CAudioOutIrix::_Reset()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- if ( m_nDevID < 0 )
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- else
- {
- //Throw away all frames in the audio buffer.
- //XXXgfw this isn't available on Irix 6.2
- //alDiscardFrames(m_pALPort, m_ulDeviceBufferSize/m_uSampFrameSize/m_unNumChannels );
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- //Device specific method to get/set the devices current volume.
- UINT16 CAudioOutIrix::_GetVolume() const
- {
- float newVolume = 0;
- long buf[4] = {
- AL_LEFT_SPEAKER_GAIN, 128,
- AL_RIGHT_SPEAKER_GAIN, 128
- };
- ALgetparams(AL_DEFAULT_DEVICE, buf, 4);
- //Map volume to [0..100] which is what the core needs.
- //We are doing a logrythmic conversion.
- if( buf[1] != 0 )
- newVolume = 18.1*logf((float)buf[1]);
- //Round up or down.
- newVolume = trunc( newVolume+0.5 );
- if( newVolume<0 ) newVolume=0;
- if( newVolume>255) newVolume=255;
- #ifdef _DEBUG
- //fprintf( stderr, "Got a volume of: %f calculated from %lun", newVolume, buf[1] );
- #endif
- return (UINT16)newVolume;
- }
- HX_RESULT CAudioOutIrix::_SetVolume(UINT16 unVolume)
- {
- float newVolume = 0;
- HX_RESULT retCode = RA_AOE_NOERR;
- long buf[4] = {
- AL_LEFT_SPEAKER_GAIN, 128,
- AL_RIGHT_SPEAKER_GAIN, 128
- };
- //Map incoming volume from [0..100] to [0..255]
- //Volume appears to be logrythmic.
- if( unVolume != 0 )
- newVolume = expf((float)unVolume/18.1);
- //Round up or down.
- newVolume = trunc( newVolume+0.5 );
- if( newVolume>255 )
- newVolume=255;
- if( newVolume<0 )
- newVolume=0;
- #ifdef _DEBUG
- //fprintf( stderr, "Setting volume to %f calculated from %lun", newVolume, unVolume );
- #endif
- buf[1] = newVolume;
- buf[3] = newVolume;
- ALsetparams(AL_DEFAULT_DEVICE, buf, 4);
- 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 CAudioOutIrix::_Drain()
- {
- HX_RESULT retCode = RA_AOE_NOERR;
-
- if ( m_nDevID < 0 )
- {
- retCode = RA_AOE_DEVNOTOPEN;
- }
- m_wLastError = retCode;
- return m_wLastError;
- }
- ULONG32 CAudioOutIrix::_GetBytesActualyPlayed(void) const
- {
- /* Get current playback position in device DMA. */
- int bytes2 = 0;
- ULONG32 ulTheAnswer = 0;
- //Ask for the number of frames yet to be played in the
- //audio buffer and convert to bytes.
- bytes2 = ALgetfilled( m_pALPort );
- if( bytes2 >= 0)
- {
- //Convert frames to bytes.
- bytes2 = bytes2*m_uSampFrameSize*m_unNumChannels;
- ulTheAnswer = (ULONG32)(m_ulTotalWritten - bytes2 );
- }
- 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 CAudioOutIrix::_GetRoomOnDevice(ULONG32& ulBytes) const
- {
- HX_RESULT retCode = RA_AOE_NOERR;
- //Get the number of frames we can write without blocking
- //and convert it to bytes.
- int nFrames = ALgetfillable( m_pALPort );
- ulBytes = nFrames*m_uSampFrameSize*m_unNumChannels;
-
- m_wLastError = retCode;
- return m_wLastError;
- }
- HX_RESULT CAudioOutIrix::_CheckSampleRate( ULONG32 ulSampleRate )
- {
- //Still need to do this one.
- #ifdef _DEBUG
- fprintf( stderr, "_CheckSampleRate not support yet.n" );
- #endif
- m_wLastError = RA_AOE_NOERR;
- return m_wLastError;
- }