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authorJesse Hall <jessehall@google.com>2012-07-23 10:12:30 -0700
committerandroid code review <noreply-gerritcodereview@google.com>2012-07-23 10:12:30 -0700
commit2b3a42e7d0b441f71fc2e2b07269dd1f8151c977 (patch)
treeded6ee18c4e1f33df235e53615a6d65e2d64f4ef /distrib/sdl-1.2.15/src/audio/dart/SDL_dart.c
parent3dcbebfd43e409c3bbff7fc79288e40666a947fd (diff)
parent9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f (diff)
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Merge changes I505c4aea,I2ae0529c
* changes: Import SDL release-1.2.15 Handle SDL windows with BGRA color
Diffstat (limited to 'distrib/sdl-1.2.15/src/audio/dart/SDL_dart.c')
-rw-r--r--distrib/sdl-1.2.15/src/audio/dart/SDL_dart.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/audio/dart/SDL_dart.c b/distrib/sdl-1.2.15/src/audio/dart/SDL_dart.c
new file mode 100644
index 0000000..77e530d
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/audio/dart/SDL_dart.c
@@ -0,0 +1,441 @@
+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2012 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
+};
+