diff options
Diffstat (limited to 'distrib/sdl-1.2.12/src/audio/dart/SDL_dart.c')
| -rw-r--r-- | distrib/sdl-1.2.12/src/audio/dart/SDL_dart.c | 441 |
1 files changed, 0 insertions, 441 deletions
diff --git a/distrib/sdl-1.2.12/src/audio/dart/SDL_dart.c b/distrib/sdl-1.2.12/src/audio/dart/SDL_dart.c deleted file mode 100644 index a37a5e2..0000000 --- a/distrib/sdl-1.2.12/src/audio/dart/SDL_dart.c +++ /dev/null @@ -1,441 +0,0 @@ -/* - SDL - Simple DirectMedia Layer - Copyright (C) 1997-2006 Sam Lantinga - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, write to the Free Software - Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - - Sam Lantinga - slouken@libsdl.org -*/ -#include "SDL_config.h" - -/* Allow access to a raw mixing buffer */ - -#include "SDL_timer.h" -#include "SDL_audio.h" -#include "../SDL_audio_c.h" -#include "SDL_dart.h" - -// Buffer states: -#define BUFFER_EMPTY 0 -#define BUFFER_USED 1 - -typedef struct _tMixBufferDesc { - int iBufferUsage; // BUFFER_EMPTY or BUFFER_USED - SDL_AudioDevice *pSDLAudioDevice; -} tMixBufferDesc, *pMixBufferDesc; - - -//--------------------------------------------------------------------- -// DARTEventFunc -// -// This function is called by DART, when an event occures, like end of -// playback of a buffer, etc... -//--------------------------------------------------------------------- -LONG APIENTRY DARTEventFunc(ULONG ulStatus, - PMCI_MIX_BUFFER pBuffer, - ULONG ulFlags) -{ - if (ulFlags && MIX_WRITE_COMPLETE) - { // Playback of buffer completed! - - // Get pointer to buffer description - pMixBufferDesc pBufDesc; - - if (pBuffer) - { - pBufDesc = (pMixBufferDesc) (*pBuffer).ulUserParm; - - if (pBufDesc) - { - SDL_AudioDevice *pSDLAudioDevice = pBufDesc->pSDLAudioDevice; - // Set the buffer to be empty - pBufDesc->iBufferUsage = BUFFER_EMPTY; - // And notify DART feeder thread that it will have to work a bit. - if (pSDLAudioDevice) - DosPostEventSem(pSDLAudioDevice->hidden->hevAudioBufferPlayed); - } - } - } - return TRUE; -} - - -int DART_OpenAudio(_THIS, SDL_AudioSpec *spec) -{ - Uint16 test_format = SDL_FirstAudioFormat(spec->format); - int valid_datatype = 0; - MCI_AMP_OPEN_PARMS AmpOpenParms; - MCI_GENERIC_PARMS GenericParms; - int iDeviceOrd = 0; // Default device to be used - int bOpenShared = 1; // Try opening it shared - int iBits = 16; // Default is 16 bits signed - int iFreq = 44100; // Default is 44KHz - int iChannels = 2; // Default is 2 channels (Stereo) - int iNumBufs = 2; // Number of audio buffers: 2 - int iBufSize; - int iOpenMode; - int iSilence; - int rc; - - // First thing is to try to open a given DART device! - SDL_memset(&AmpOpenParms, 0, sizeof(MCI_AMP_OPEN_PARMS)); - // pszDeviceType should contain the device type in low word, and device ordinal in high word! - AmpOpenParms.pszDeviceType = (PSZ) (MCI_DEVTYPE_AUDIO_AMPMIX | (iDeviceOrd << 16)); - - iOpenMode = MCI_WAIT | MCI_OPEN_TYPE_ID; - if (bOpenShared) iOpenMode |= MCI_OPEN_SHAREABLE; - - rc = mciSendCommand( 0, MCI_OPEN, - iOpenMode, - (PVOID) &AmpOpenParms, 0); - if (rc!=MCIERR_SUCCESS) // No audio available?? - return (-1); - // Save the device ID we got from DART! - // We will use this in the next calls! - iDeviceOrd = AmpOpenParms.usDeviceID; - - // Determine the audio parameters from the AudioSpec - if (spec->channels > 2) - spec->channels = 2; // !!! FIXME: more than stereo support in OS/2? - - while ((!valid_datatype) && (test_format)) { - spec->format = test_format; - valid_datatype = 1; - switch (test_format) { - case AUDIO_U8: - // Unsigned 8 bit audio data - iSilence = 0x80; - iBits = 8; - break; - - case AUDIO_S16LSB: - // Signed 16 bit audio data - iSilence = 0x00; - iBits = 16; - break; - - default: - valid_datatype = 0; - test_format = SDL_NextAudioFormat(); - break; - } - } - - if (!valid_datatype) { // shouldn't happen, but just in case... - // Close DART, and exit with error code! - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("Unsupported audio format"); - return (-1); - } - - iFreq = spec->freq; - iChannels = spec->channels; - /* Update the fragment size as size in bytes */ - SDL_CalculateAudioSpec(spec); - iBufSize = spec->size; - - // Now query this device if it supports the given freq/bits/channels! - SDL_memset(&(_this->hidden->MixSetupParms), 0, sizeof(MCI_MIXSETUP_PARMS)); - _this->hidden->MixSetupParms.ulBitsPerSample = iBits; - _this->hidden->MixSetupParms.ulFormatTag = MCI_WAVE_FORMAT_PCM; - _this->hidden->MixSetupParms.ulSamplesPerSec = iFreq; - _this->hidden->MixSetupParms.ulChannels = iChannels; - _this->hidden->MixSetupParms.ulFormatMode = MCI_PLAY; - _this->hidden->MixSetupParms.ulDeviceType = MCI_DEVTYPE_WAVEFORM_AUDIO; - _this->hidden->MixSetupParms.pmixEvent = DARTEventFunc; - rc = mciSendCommand (iDeviceOrd, MCI_MIXSETUP, - MCI_WAIT | MCI_MIXSETUP_QUERYMODE, - &(_this->hidden->MixSetupParms), 0); - if (rc!=MCIERR_SUCCESS) - { // The device cannot handle this format! - // Close DART, and exit with error code! - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("Audio device doesn't support requested audio format"); - return(-1); - } - // The device can handle this format, so initialize! - rc = mciSendCommand(iDeviceOrd, MCI_MIXSETUP, - MCI_WAIT | MCI_MIXSETUP_INIT, - &(_this->hidden->MixSetupParms), 0); - if (rc!=MCIERR_SUCCESS) - { // The device could not be opened! - // Close DART, and exit with error code! - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("Audio device could not be set up"); - return(-1); - } - // Ok, the device is initialized. - // Now we should allocate buffers. For this, we need a place where - // the buffer descriptors will be: - _this->hidden->pMixBuffers = (MCI_MIX_BUFFER *) SDL_malloc(sizeof(MCI_MIX_BUFFER)*iNumBufs); - if (!(_this->hidden->pMixBuffers)) - { // Not enough memory! - // Close DART, and exit with error code! - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("Not enough memory for audio buffer descriptors"); - return(-1); - } - // Now that we have the place for buffer list, we can ask DART for the - // buffers! - _this->hidden->BufferParms.ulNumBuffers = iNumBufs; // Number of buffers - _this->hidden->BufferParms.ulBufferSize = iBufSize; // each with this size - _this->hidden->BufferParms.pBufList = _this->hidden->pMixBuffers; // getting descriptorts into this list - // Allocate buffers! - rc = mciSendCommand(iDeviceOrd, MCI_BUFFER, - MCI_WAIT | MCI_ALLOCATE_MEMORY, - &(_this->hidden->BufferParms), 0); - if ((rc!=MCIERR_SUCCESS) || (iNumBufs != _this->hidden->BufferParms.ulNumBuffers) || (_this->hidden->BufferParms.ulBufferSize==0)) - { // Could not allocate memory! - // Close DART, and exit with error code! - SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("DART could not allocate buffers"); - return(-1); - } - // Ok, we have all the buffers allocated, let's mark them! - { - int i; - for (i=0; i<iNumBufs; i++) - { - pMixBufferDesc pBufferDesc = (pMixBufferDesc) SDL_malloc(sizeof(tMixBufferDesc));; - // Check if this buffer was really allocated by DART - if ((!(_this->hidden->pMixBuffers[i].pBuffer)) || (!pBufferDesc)) - { // Wrong buffer! - // Close DART, and exit with error code! - // Free buffer descriptions - { int j; - for (j=0; j<i; j++) SDL_free((void *)(_this->hidden->pMixBuffers[j].ulUserParm)); - } - // and cleanup - mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); - SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("Error at internal buffer check"); - return(-1); - } - pBufferDesc->iBufferUsage = BUFFER_EMPTY; - pBufferDesc->pSDLAudioDevice = _this; - - _this->hidden->pMixBuffers[i].ulBufferLength = _this->hidden->BufferParms.ulBufferSize; - _this->hidden->pMixBuffers[i].ulUserParm = (ULONG) pBufferDesc; // User parameter: Description of buffer - _this->hidden->pMixBuffers[i].ulFlags = 0; // Some stuff should be flagged here for DART, like end of - // audio data, but as we will continously send - // audio data, there will be no end.:) - SDL_memset(_this->hidden->pMixBuffers[i].pBuffer, iSilence, iBufSize); - } - } - _this->hidden->iNextFreeBuffer = 0; - _this->hidden->iLastPlayedBuf = -1; - // Create event semaphore - if (DosCreateEventSem(NULL, &(_this->hidden->hevAudioBufferPlayed), 0, FALSE)!=NO_ERROR) - { - // Could not create event semaphore! - { - int i; - for (i=0; i<iNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); - } - mciSendCommand(iDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); - SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; - mciSendCommand(iDeviceOrd, MCI_CLOSE, MCI_WAIT, &GenericParms, 0); - SDL_SetError("Could not create event semaphore"); - return(-1); - } - - // Store the new settings in global variables - _this->hidden->iCurrDeviceOrd = iDeviceOrd; - _this->hidden->iCurrFreq = iFreq; - _this->hidden->iCurrBits = iBits; - _this->hidden->iCurrChannels = iChannels; - _this->hidden->iCurrNumBufs = iNumBufs; - _this->hidden->iCurrBufSize = iBufSize; - - return (0); -} - - - -void DART_ThreadInit(_THIS) -{ - return; -} - -/* This function waits until it is possible to write a full sound buffer */ -void DART_WaitAudio(_THIS) -{ - int i; - pMixBufferDesc pBufDesc; - ULONG ulPostCount; - - DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); - // If there is already an empty buffer, then return now! - for (i=0; i<_this->hidden->iCurrNumBufs; i++) - { - pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[i].ulUserParm; - if (pBufDesc->iBufferUsage == BUFFER_EMPTY) - return; - } - // If there is no empty buffer, wait for one to be empty! - DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // Wait max 1 sec!!! Important! - return; -} - -void DART_PlayAudio(_THIS) -{ - int iFreeBuf = _this->hidden->iNextFreeBuffer; - pMixBufferDesc pBufDesc; - - pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; - pBufDesc->iBufferUsage = BUFFER_USED; - // Send it to DART to be queued - _this->hidden->MixSetupParms.pmixWrite(_this->hidden->MixSetupParms.ulMixHandle, - &(_this->hidden->pMixBuffers[iFreeBuf]), 1); - - _this->hidden->iLastPlayedBuf = iFreeBuf; - iFreeBuf = (iFreeBuf+1) % _this->hidden->iCurrNumBufs; - _this->hidden->iNextFreeBuffer = iFreeBuf; -} - -Uint8 *DART_GetAudioBuf(_THIS) -{ - int iFreeBuf; - Uint8 *pResult; - pMixBufferDesc pBufDesc; - - if (_this) - { - if (_this->hidden) - { - iFreeBuf = _this->hidden->iNextFreeBuffer; - pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[iFreeBuf].ulUserParm; - - if (pBufDesc) - { - if (pBufDesc->iBufferUsage == BUFFER_EMPTY) - { - pResult = _this->hidden->pMixBuffers[iFreeBuf].pBuffer; - return pResult; - } - } else - printf("[DART_GetAudioBuf] : ERROR! pBufDesc = %p\n", pBufDesc); - } else - printf("[DART_GetAudioBuf] : ERROR! _this->hidden = %p\n", _this->hidden); - } else - printf("[DART_GetAudioBuf] : ERROR! _this = %p\n", _this); - return NULL; -} - -void DART_WaitDone(_THIS) -{ - pMixBufferDesc pBufDesc; - ULONG ulPostCount; - APIRET rc; - - pBufDesc = (pMixBufferDesc) _this->hidden->pMixBuffers[_this->hidden->iLastPlayedBuf].ulUserParm; - rc = NO_ERROR; - while ((pBufDesc->iBufferUsage != BUFFER_EMPTY) && (rc==NO_ERROR)) - { - DosResetEventSem(_this->hidden->hevAudioBufferPlayed, &ulPostCount); - rc = DosWaitEventSem(_this->hidden->hevAudioBufferPlayed, 1000); // 1 sec timeout! Important! - } -} - -void DART_CloseAudio(_THIS) -{ - MCI_GENERIC_PARMS GenericParms; - int rc; - - // Stop DART playback - rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_STOP, MCI_WAIT, &GenericParms, 0); - if (rc!=MCIERR_SUCCESS) - { -#ifdef SFX_DEBUG_BUILD - printf("Could not stop DART playback!\n"); - fflush(stdout); -#endif - } - - // Close event semaphore - DosCloseEventSem(_this->hidden->hevAudioBufferPlayed); - - // Free memory of buffer descriptions - { - int i; - for (i=0; i<_this->hidden->iCurrNumBufs; i++) SDL_free((void *)(_this->hidden->pMixBuffers[i].ulUserParm)); - } - - // Deallocate buffers - rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_BUFFER, MCI_WAIT | MCI_DEALLOCATE_MEMORY, &(_this->hidden->BufferParms), 0); - - // Free bufferlist - SDL_free(_this->hidden->pMixBuffers); _this->hidden->pMixBuffers = NULL; - - // Close dart - rc = mciSendCommand(_this->hidden->iCurrDeviceOrd, MCI_CLOSE, MCI_WAIT, &(GenericParms), 0); -} - -/* Audio driver bootstrap functions */ - -int Audio_Available(void) -{ - return(1); -} - -void Audio_DeleteDevice(SDL_AudioDevice *device) -{ - SDL_free(device->hidden); - SDL_free(device); -} - -SDL_AudioDevice *Audio_CreateDevice(int devindex) -{ - SDL_AudioDevice *this; - - /* Initialize all variables that we clean on shutdown */ - this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); - if ( this ) - { - SDL_memset(this, 0, (sizeof *this)); - this->hidden = (struct SDL_PrivateAudioData *) - SDL_malloc((sizeof *this->hidden)); - } - if ( (this == NULL) || (this->hidden == NULL) ) - { - SDL_OutOfMemory(); - if ( this ) - SDL_free(this); - return(0); - } - SDL_memset(this->hidden, 0, (sizeof *this->hidden)); - - /* Set the function pointers */ - this->OpenAudio = DART_OpenAudio; - this->ThreadInit = DART_ThreadInit; - this->WaitAudio = DART_WaitAudio; - this->PlayAudio = DART_PlayAudio; - this->GetAudioBuf = DART_GetAudioBuf; - this->WaitDone = DART_WaitDone; - this->CloseAudio = DART_CloseAudio; - - this->free = Audio_DeleteDevice; - - return this; -} - -AudioBootStrap DART_bootstrap = { - "dart", "OS/2 Direct Audio RouTines (DART)", - Audio_Available, Audio_CreateDevice -}; - |