OS/2 port!
This was mostly, if not entirely, written by "Doodle" and "Caetano":
doodle@scenergy.dfmk.hu
daniel@caetano.eng.br
--ryan.
--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401193
This commit is contained in:
Ryan C. Gordon
parent
c154edb92f
commit
b08452cb40
49 changed files with 6571 additions and 8 deletions
436
src/audio/dart/SDL_dart.c
Normal file
436
src/audio/dart/SDL_dart.c
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/*
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SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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Sam Lantinga
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slouken@libsdl.org
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*/
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#ifdef SAVE_RCSID
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static char rcsid =
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"@(#) $Id$";
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#endif
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/* Allow access to a raw mixing buffer */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "SDL_types.h"
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#include "SDL_error.h"
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#include "SDL_timer.h"
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#include "SDL_audio.h"
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#include "SDL_audio_c.h"
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#include "SDL_dart.h"
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// Buffer states:
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#define BUFFER_EMPTY 0
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#define BUFFER_USED 1
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typedef struct _tMixBufferDesc {
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int iBufferUsage; // BUFFER_EMPTY or BUFFER_USED
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SDL_AudioDevice *pSDLAudioDevice;
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} tMixBufferDesc, *pMixBufferDesc;
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//---------------------------------------------------------------------
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// DARTEventFunc
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//
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// This function is called by DART, when an event occures, like end of
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// playback of a buffer, etc...
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//---------------------------------------------------------------------
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LONG APIENTRY DARTEventFunc(ULONG ulStatus,
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PMCI_MIX_BUFFER pBuffer,
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ULONG ulFlags)
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{
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if (ulFlags && MIX_WRITE_COMPLETE)
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{ // Playback of buffer completed!
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// Get pointer to buffer description
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pMixBufferDesc pBufDesc;
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if (pBuffer)
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{
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pBufDesc = (pMixBufferDesc) (*pBuffer).ulUserParm;
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if (pBufDesc)
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{
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SDL_AudioDevice *pSDLAudioDevice = pBufDesc->pSDLAudioDevice;
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// Set the buffer to be empty
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pBufDesc->iBufferUsage = BUFFER_EMPTY;
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// And notify DART feeder thread that it will have to work a bit.
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if (pSDLAudioDevice)
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DosPostEventSem(pSDLAudioDevice->hidden->hevAudioBufferPlayed);
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}
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}
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}
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return TRUE;
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}
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int DART_OpenAudio(_THIS, SDL_AudioSpec *spec)
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{
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MCI_AMP_OPEN_PARMS AmpOpenParms;
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MCI_GENERIC_PARMS GenericParms;
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int iDeviceOrd = 0; // Default device to be used
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int bOpenShared = 1; // Try opening it shared
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int iBits = 16; // Default is 16 bits signed
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int iFreq = 44100; // Default is 44KHz
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int iChannels = 2; // Default is 2 channels (Stereo)
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int iNumBufs = 2; // Number of audio buffers: 2
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int iBufSize;
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int iOpenMode;
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int iSilence;
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int rc;
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// First thing is to try to open a given DART device!
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memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS));
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// pszDeviceType should contain the device type in low word, and device ordinal in high word!
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AmpOpenParms.pszDeviceType = (PSZ) (MCI_DEVTYPE_AUDIO_AMPMIX | (iDeviceOrd << 16));
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iOpenMode = MCI_WAIT | MCI_OPEN_TYPE_ID;
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if (bOpenShared) iOpenMode |= MCI_OPEN_SHAREABLE;
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rc = mciSendCommand( 0, MCI_OPEN,
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iOpenMode,
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(PVOID) &AmpOpenParms, 0);
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if (rc!=MCIERR_SUCCESS) // No audio available??
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return (-1);
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// Save the device ID we got from DART!
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// We will use this in the next calls!
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iDeviceOrd = AmpOpenParms.usDeviceID;
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// Determine the audio parameters from the AudioSpec
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switch ( spec->format & 0xFF )
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{
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case 8:
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/* Unsigned 8 bit audio data */
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spec->format = AUDIO_U8;
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iSilence = 0x80;
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iBits = 8;
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break;
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case 16:
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/* Signed 16 bit audio data */
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spec->format = AUDIO_S16;
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iSilence = 0x00;
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iBits = 16;
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break;
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default:
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// Close DART, and exit with error code!
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("Unsupported audio format");
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return(-1);
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}
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iFreq = spec->freq;
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iChannels = spec->channels;
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/* Update the fragment size as size in bytes */
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SDL_CalculateAudioSpec(spec);
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iBufSize = spec->size;
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// Now query this device if it supports the given freq/bits/channels!
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memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS));
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_this->hidden->MixSetupParms.ulBitsPerSample = iBits;
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_this->hidden->MixSetupParms.ulFormatTag = MCI_WAVE_FORMAT_PCM;
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_this->hidden->MixSetupParms.ulSamplesPerSec = iFreq;
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_this->hidden->MixSetupParms.ulChannels = iChannels;
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_this->hidden->MixSetupParms.ulFormatMode = MCI_PLAY;
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_this->hidden->MixSetupParms.ulDeviceType = MCI_DEVTYPE_WAVEFORM_AUDIO;
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_this->hidden->MixSetupParms.pmixEvent = DARTEventFunc;
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rc = mciSendCommand (iDeviceOrd, MCI_MIXSETUP,
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MCI_WAIT | MCI_MIXSETUP_QUERYMODE,
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&(_this->hidden->MixSetupParms), 0);
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if (rc!=MCIERR_SUCCESS)
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{ // The device cannot handle this format!
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// Close DART, and exit with error code!
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("Audio device doesn't support requested audio format");
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return(-1);
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}
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// The device can handle this format, so initialize!
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rc = mciSendCommand(iDeviceOrd, MCI_MIXSETUP,
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MCI_WAIT | MCI_MIXSETUP_INIT,
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&(_this->hidden->MixSetupParms), 0);
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if (rc!=MCIERR_SUCCESS)
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{ // The device could not be opened!
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// Close DART, and exit with error code!
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("Audio device could not be set up");
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return(-1);
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}
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// Ok, the device is initialized.
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// Now we should allocate buffers. For this, we need a place where
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// the buffer descriptors will be:
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_this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs);
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if (!(_this->hidden->pMixBuffers))
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{ // Not enough memory!
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// Close DART, and exit with error code!
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("Not enough memory for audio buffer descriptors");
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return(-1);
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}
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// Now that we have the place for buffer list, we can ask DART for the
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// buffers!
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_this->hidden->BufferParms.ulNumBuffers = iNumBufs; // Number of buffers
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_this->hidden->BufferParms.ulBufferSize = iBufSize; // each with this size
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_this->hidden->BufferParms.pBufList = _this->hidden->pMixBuffers; // getting descriptorts into this list
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// Allocate buffers!
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rc = mciSendCommand(iDeviceOrd, MCI_BUFFER,
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MCI_WAIT | MCI_ALLOCATE_MEMORY,
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&(_this->hidden->BufferParms), 0);
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if ((rc!=MCIERR_SUCCESS) || (iNumBufs != _this->hidden->BufferParms.ulNumBuffers) || (_this->hidden->BufferParms.ulBufferSize==0))
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{ // Could not allocate memory!
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// Close DART, and exit with error code!
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free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL;
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("DART could not allocate buffers");
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return(-1);
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}
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// Ok, we have all the buffers allocated, let's mark them!
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{
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int i;
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for (i=0; i<iNumBufs; i++)
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{
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pMixBufferDesc pBufferDesc = (pMixBufferDesc) malloc(sizeof(tMixBufferDesc));;
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// Check if this buffer was really allocated by DART
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if ((!(_this->hidden->pMixBuffers[i].pBuffer)) || (!pBufferDesc))
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{ // Wrong buffer!
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// Close DART, and exit with error code!
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// Free buffer descriptions
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{ int j;
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for (j=0; j<i; j++) free((void *)(_this->hidden->pMixBuffers[j].ulUserParm));
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}
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// and cleanup
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mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0);
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free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL;
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("Error at internal buffer check");
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return(-1);
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}
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pBufferDesc->iBufferUsage = BUFFER_EMPTY;
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pBufferDesc->pSDLAudioDevice = _this;
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_this->hidden->pMixBuffers[i].ulBufferLength = _this->hidden->BufferParms.ulBufferSize;
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_this->hidden->pMixBuffers[i].ulUserParm = (ULONG) pBufferDesc; // User parameter: Description of buffer
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_this->hidden->pMixBuffers[i].ulFlags = 0; // Some stuff should be flagged here for DART, like end of
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// audio data, but as we will continously send
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// audio data, there will be no end.:)
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memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize);
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}
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}
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_this->hidden->iNextFreeBuffer = 0;
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_this->hidden->iLastPlayedBuf = -1;
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// Create event semaphore
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if (DosCreateEventSem(NULL, &(_this->hidden->hevAudioBufferPlayed), 0, FALSE)!=NO_ERROR)
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{
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// Could not create event semaphore!
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{
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int i;
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for (i=0; i<iNumBufs; i++) free((void *)(_this->hidden->pMixBuffers[i].ulUserParm));
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}
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mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0);
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free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL;
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mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0);
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SDL_SetError("Could not create event semaphore");
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return(-1);
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}
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// Store the new settings in global variables
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_this->hidden->iCurrDeviceOrd = iDeviceOrd;
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_this->hidden->iCurrFreq = iFreq;
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_this->hidden->iCurrBits = iBits;
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_this->hidden->iCurrChannels = iChannels;
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_this->hidden->iCurrNumBufs = iNumBufs;
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_this->hidden->iCurrBufSize = iBufSize;
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return (0);
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}
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void DART_ThreadInit(_THIS)
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{
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return;
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}
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/* This function waits until it is possible to write a full sound buffer */
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void DART_WaitAudio(_THIS)
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{
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int i;
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pMixBufferDesc pBufDesc;
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ULONG ulPostCount;
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DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount);
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// If there is already an empty buffer, then return now!
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for (i=0; i<_this->hidden->iCurrNumBufs; i++)
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{
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pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[i].ulUserParm;
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if (pBufDesc->iBufferUsage == BUFFER_EMPTY)
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return;
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}
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// If there is no empty buffer, wait for one to be empty!
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DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // Wait max 1 sec!!! Important!
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return;
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}
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void DART_PlayAudio(_THIS)
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{
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int iFreeBuf = _this->hidden->iNextFreeBuffer;
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pMixBufferDesc pBufDesc;
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pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm;
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pBufDesc->iBufferUsage = BUFFER_USED;
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// Send it to DART to be queued
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_this->hidden->MixSetupParms.pmixWrite(_this->hidden->MixSetupParms.ulMixHandle,
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&(_this->hidden->pMixBuffers[iFreeBuf]), 1);
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_this->hidden->iLastPlayedBuf = iFreeBuf;
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iFreeBuf = (iFreeBuf+1) % _this->hidden->iCurrNumBufs;
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_this->hidden->iNextFreeBuffer = iFreeBuf;
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}
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Uint8 *DART_GetAudioBuf(_THIS)
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{
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int iFreeBuf;
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Uint8 *pResult;
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pMixBufferDesc pBufDesc;
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if (_this)
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{
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if (_this->hidden)
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{
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iFreeBuf = _this->hidden->iNextFreeBuffer;
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pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm;
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if (pBufDesc)
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{
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if (pBufDesc->iBufferUsage == BUFFER_EMPTY)
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{
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pResult = _this->hidden->pMixBuffers[iFreeBuf].pBuffer;
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return pResult;
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}
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} else
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printf("[DART_GetAudioBuf] : ERROR! pBufDesc = %p\n", pBufDesc);
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} else
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printf("[DART_GetAudioBuf] : ERROR! _this->hidden = %p\n", _this->hidden);
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} else
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printf("[DART_GetAudioBuf] : ERROR! _this = %p\n", _this);
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return NULL;
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}
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void DART_WaitDone(_THIS)
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{
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pMixBufferDesc pBufDesc;
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ULONG ulPostCount;
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APIRET rc;
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pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[_this->hidden->iLastPlayedBuf].ulUserParm;
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rc = NO_ERROR;
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while ((pBufDesc->iBufferUsage != BUFFER_EMPTY) && (rc==NO_ERROR))
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{
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DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount);
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rc = DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // 1 sec timeout! Important!
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}
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}
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void DART_CloseAudio(_THIS)
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{
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MCI_GENERIC_PARMS GenericParms;
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int rc;
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// Stop DART playback
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rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_STOP, MCI_WAIT, &GenericParms, 0);
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if (rc!=MCIERR_SUCCESS)
|
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{
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#ifdef SFX_DEBUG_BUILD
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printf("Could not stop DART playback!\n");
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fflush(stdout);
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#endif
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}
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// Close event semaphore
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DosCloseEventSem(_this->hidden->hevAudioBufferPlayed);
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// Free memory of buffer descriptions
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{
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int i;
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for (i=0; i<_this->hidden->iCurrNumBufs; i++) free((void *)(_this->hidden->pMixBuffers[i].ulUserParm));
|
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}
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// Deallocate buffers
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rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0);
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// Free bufferlist
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free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL;
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// Close dart
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rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_CLOSE, MCI_WAIT, &(GenericParms), 0);
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}
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/* Audio driver bootstrap functions */
|
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int Audio_Available(void)
|
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{
|
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return(1);
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}
|
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void Audio_DeleteDevice(SDL_AudioDevice *device)
|
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{
|
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free(device->hidden);
|
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free(device);
|
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}
|
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|
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SDL_AudioDevice *Audio_CreateDevice(int devindex)
|
||||
{
|
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SDL_AudioDevice *this;
|
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|
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/* Initialize all variables that we clean on shutdown */
|
||||
this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
|
||||
if ( this )
|
||||
{
|
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memset(this, 0, (sizeof *this));
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this->hidden = (struct SDL_PrivateAudioData *)
|
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malloc((sizeof *this->hidden));
|
||||
}
|
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if ( (this == NULL) || (this->hidden == NULL) )
|
||||
{
|
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SDL_OutOfMemory();
|
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if ( this )
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free(this);
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return(0);
|
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}
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memset(this->hidden, 0, (sizeof *this->hidden));
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/* Set the function pointers */
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this->OpenAudio = DART_OpenAudio;
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this->ThreadInit = DART_ThreadInit;
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this->WaitAudio = DART_WaitAudio;
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this->PlayAudio = DART_PlayAudio;
|
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this->GetAudioBuf = DART_GetAudioBuf;
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this->WaitDone = DART_WaitDone;
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this->CloseAudio = DART_CloseAudio;
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this->free = Audio_DeleteDevice;
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return this;
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}
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AudioBootStrap DART_bootstrap = {
|
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"dart", "OS/2 Direct Audio RouTines (DART)",
|
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Audio_Available, Audio_CreateDevice
|
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};
|
||||
|
||||
Loading…
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Reference in a new issue