SDL_mmeaudio.c revision 9682c8870b8ff5e4ac2e4c70b759f791c6f38c1f
19682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* 29682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL - Simple DirectMedia Layer 39682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Copyright (C) 1997-2012 Sam Lantinga 49682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 59682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is free software; you can redistribute it and/or 69682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall modify it under the terms of the GNU Library General Public 79682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License as published by the Free Software Foundation; either 89682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall version 2 of the License, or (at your option) any later version. 99682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall This library is distributed in the hope that it will be useful, 119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall but WITHOUT ANY WARRANTY; without even the implied warranty of 129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Library General Public License for more details. 149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall You should have received a copy of the GNU Library General Public 169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall License along with this library; if not, write to the Free 179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Sam Lantinga 209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall slouken@libsdl.org 219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall*/ 229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_config.h" 239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Tru64 UNIX MME support */ 259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include <mme_api.h> 269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_timer.h" 289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_audio.h" 299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "../SDL_audio_c.h" 309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall#include "SDL_mmeaudio.h" 319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic BOOL inUse[NUM_BUFFERS]; 339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Audio driver functions */ 359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int MME_OpenAudio(_THIS, SDL_AudioSpec *spec); 369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_WaitAudio(_THIS); 379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic Uint8 *MME_GetAudioBuf(_THIS); 389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_PlayAudio(_THIS); 399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_WaitDone(_THIS); 409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_CloseAudio(_THIS); 419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Audio driver bootstrap functions */ 439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int Audio_Available(void) 449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(1); 469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void Audio_DeleteDevice(SDL_AudioDevice *device) 499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( device ) { 519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( device->hidden ) { 529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(device->hidden); 539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall device->hidden = NULL; 549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(device); 569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall device = NULL; 579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic SDL_AudioDevice *Audio_CreateDevice(int devindex) 619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_AudioDevice *this; 639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall/* Initialize all variables that we clean on shutdown */ 659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this = SDL_malloc(sizeof(SDL_AudioDevice)); 669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( this ) { 679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(this, 0, (sizeof *this)); 689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->hidden = SDL_malloc((sizeof *this->hidden)); 699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( (this == NULL) || (this->hidden == NULL) ) { 719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_OutOfMemory(); 729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( this ) { 739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_free(this); 749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(0); 769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_memset(this->hidden, 0, (sizeof *this->hidden)); 789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set the function pointers */ 799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->OpenAudio = MME_OpenAudio; 809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->WaitAudio = MME_WaitAudio; 819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->PlayAudio = MME_PlayAudio; 829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->GetAudioBuf = MME_GetAudioBuf; 839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->WaitDone = MME_WaitDone; 849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->CloseAudio = MME_CloseAudio; 859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall this->free = Audio_DeleteDevice; 869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return this; 889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse HallAudioBootStrap MMEAUDIO_bootstrap = { 919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall "waveout", "Tru64 MME WaveOut", 929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Audio_Available, Audio_CreateDevice 939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall}; 949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void SetMMerror(char *function, MMRESULT code) 969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int len; 989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall char errbuf[MAXERRORLENGTH]; 999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_snprintf(errbuf, SDL_arraysize(errbuf), "%s: ", function); 1019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall len = SDL_strlen(errbuf); 1029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall waveOutGetErrorText(code, errbuf+len, MAXERRORLENGTH-len); 1039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("%s",errbuf); 1049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void CALLBACK MME_CALLBACK(HWAVEOUT hwo, 1079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall UINT uMsg, 1089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall DWORD dwInstance, 1099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall LPARAM dwParam1, 1109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall LPARAM dwParam2) 1119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall WAVEHDR *wp = (WAVEHDR *) dwParam1; 1139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( uMsg == WOM_DONE ) 1159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall inUse[wp->dwUser] = FALSE; 1169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic int MME_OpenAudio(_THIS, SDL_AudioSpec *spec) 1199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 1209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MMRESULT result; 1219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int i; 1229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixbuf = NULL; 1249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Set basic WAVE format parameters */ 1269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm = mmeAllocMem(sizeof(*shm)); 1279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( shm == NULL ) { 1289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Out of memory: shm"); 1299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 1309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->sound = 0; 1329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.wFormatTag = WAVE_FORMAT_PCM; 1339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Determine the audio parameters from the AudioSpec */ 1359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall switch ( spec->format & 0xFF ) { 1369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 8: 1379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Unsigned 8 bit audio data */ 1389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall spec->format = AUDIO_U8; 1399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wBitsPerSample = 8; 1409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall case 16: 1429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Signed 16 bit audio data */ 1439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall spec->format = AUDIO_S16; 1449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wBitsPerSample = 16; 1459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall break; 1469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall default: 1479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Unsupported audio format"); 1489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 1499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.nChannels = spec->channels; 1529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.nSamplesPerSec = spec->freq; 1539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.nBlockAlign = 1549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.nChannels * shm->wFmt.wBitsPerSample / 8; 1559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.nAvgBytesPerSec = 1569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wFmt.wf.nSamplesPerSec * shm->wFmt.wf.nBlockAlign; 1579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Check the buffer size -- minimum of 1/4 second (word aligned) */ 1599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( spec->samples < (spec->freq/4) ) 1609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall spec->samples = ((spec->freq/4)+3)&~3; 1619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Update the fragment size as size in bytes */ 1639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_CalculateAudioSpec(spec); 1649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1659682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Open the audio device */ 1669682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = waveOutOpen(&(shm->sound), 1679682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall WAVE_MAPPER, 1689682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall &(shm->wFmt.wf), 1699682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MME_CALLBACK, 1709682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall NULL, 1719682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall (CALLBACK_FUNCTION|WAVE_OPEN_SHAREABLE)); 1729682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( result != MMSYSERR_NOERROR ) { 1739682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SetMMerror("waveOutOpen()", result); 1749682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 1759682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1769682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1779682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Create the sound buffers */ 1789682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixbuf = (Uint8 *)mmeAllocBuffer(NUM_BUFFERS * (spec->size)); 1799682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mixbuf == NULL ) { 1809682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SDL_SetError("Out of memory: mixbuf"); 1819682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return(-1); 1829682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1839682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1849682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for (i = 0; i < NUM_BUFFERS; i++) { 1859682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].lpData = &mixbuf[i * (spec->size)]; 1869682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].dwBufferLength = spec->size; 1879682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].dwFlags = 0; 1889682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].dwUser = i; 1899682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].dwLoops = 0; /* loop control counter */ 1909682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].lpNext = NULL; /* reserved for driver */ 1919682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm->wHdr[i].reserved = 0; 1929682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall inUse[i] = FALSE; 1939682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 1949682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall next_buffer = 0; 1959682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return 0; 1969682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 1979682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 1989682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_WaitAudio(_THIS) 1999682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2009682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( inUse[next_buffer] ) { 2019682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mmeWaitForCallbacks(); 2029682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mmeProcessCallbacks(); 2039682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2049682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2059682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2069682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic Uint8 *MME_GetAudioBuf(_THIS) 2079682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2089682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall Uint8 *retval; 2099682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2109682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall inUse[next_buffer] = TRUE; 2119682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall retval = (Uint8 *)(shm->wHdr[next_buffer].lpData); 2129682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall return retval; 2139682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2149682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2159682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_PlayAudio(_THIS) 2169682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2179682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall /* Queue it up */ 2189682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall waveOutWrite(shm->sound, &(shm->wHdr[next_buffer]), sizeof(WAVEHDR)); 2199682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall next_buffer = (next_buffer+1)%NUM_BUFFERS; 2209682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2219682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2229682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_WaitDone(_THIS) 2239682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2249682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MMRESULT result; 2259682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall int i; 2269682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2279682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( shm->sound ) { 2289682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall for (i = 0; i < NUM_BUFFERS; i++) 2299682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall while ( inUse[i] ) { 2309682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mmeWaitForCallbacks(); 2319682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mmeProcessCallbacks(); 2329682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2339682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = waveOutReset(shm->sound); 2349682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( result != MMSYSERR_NOERROR ) 2359682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SetMMerror("waveOutReset()", result); 2369682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mmeProcessCallbacks(); 2379682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2389682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2399682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2409682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hallstatic void MME_CloseAudio(_THIS) 2419682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall{ 2429682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall MMRESULT result; 2439682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2449682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( mixbuf ) { 2459682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = mmeFreeBuffer(mixbuf); 2469682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (result != MMSYSERR_NOERROR ) 2479682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SetMMerror("mmeFreeBuffer", result); 2489682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mixbuf = NULL; 2499682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2509682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 2519682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( shm ) { 2529682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if ( shm->sound ) { 2539682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = waveOutClose(shm->sound); 2549682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (result != MMSYSERR_NOERROR ) 2559682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SetMMerror("waveOutClose()", result); 2569682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall mmeProcessCallbacks(); 2579682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2589682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall result = mmeFreeMem(shm); 2599682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall if (result != MMSYSERR_NOERROR ) 2609682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall SetMMerror("mmeFreeMem()", result); 2619682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall shm = NULL; 2629682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall } 2639682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall} 2649682c8870b8ff5e4ac2e4c70b759f791c6f38c1fJesse Hall 265