mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 05:01:26 +00:00
329 lines
6.5 KiB
C
329 lines
6.5 KiB
C
/*
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snd_mme.c
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(description)
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Copyright (C) 1996-1997 Id Software, Inc.
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Copyright (C) 1999-2000 Marcus Sundberg [mackan@stacken.kth.se]
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Copyright (C) 1999,2000 contributors of the QuakeForge project
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Please see the file "AUTHORS" for a list of contributors
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((unused)) const char rcsid[] =
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"$Id$";
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#include <mme/mmsystem.h>
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#ifdef HAVE_MME_MME_PUBLIC_H
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# include <mme/mme_public.h>
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#endif
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#include "sound.h"
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#include "QF/sys.h"
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// 64K is > 1 second at 16-bit, 11025 Hz
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#define WAV_BUFFERS 64
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#define WAV_MASK 0x3F
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#define WAV_BUFFER_SIZE 0x0400
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static qboolean wav_init;
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static qboolean snd_firsttime = true, snd_iswave;
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static int sample16;
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static int snd_sent, snd_completed;
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static int snd_blocked = 0;
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static HPSTR lpData;
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static LPWAVEHDR lpWaveHdr;
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static HWAVEOUT hWaveOut;
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static DWORD gSndBufSize;
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static volatile dma_t sn;
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/* MME Callback function */
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static void
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mme_callback ( HANDLE h, UINT wMsg, DWORD instance, LPARAM p1, LPARAM p2 )
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{
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if (wMsg == WOM_DONE) {
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snd_completed++;
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}
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}
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static void
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S_BlockSound ( void )
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{
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if (++snd_blocked == 1)
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waveOutReset(hWaveOut);
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}
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static void
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S_UnblockSound ( void )
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{
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if (!snd_blocked)
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return;
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snd_blocked--;
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}
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static void
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FreeSound ( void )
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{
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// only release primary buffer if it's not also the mixing buffer we just released
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if (hWaveOut) {
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waveOutReset (hWaveOut);
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waveOutClose (hWaveOut);
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if (lpWaveHdr) {
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mmeFreeMem(lpWaveHdr);
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}
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if (lpData) {
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mmeFreeBuffer(lpData);
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}
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}
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hWaveOut = 0;
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lpWaveHdr = 0;
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lpData = NULL;
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lpWaveHdr = NULL;
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wav_init = false;
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}
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/*
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SNDDM_InitWav
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Crappy windows multimedia base
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*/
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static qboolean
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SNDDMA_InitWav ( void )
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{
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int hr, i;
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LPPCMWAVEFORMAT format;
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if ((format = (LPPCMWAVEFORMAT)
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mmeAllocMem(sizeof(*format))) == NULL) {
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Sys_Printf("Failed to allocate PCMWAVEFORMAT struct\n");
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return false;
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}
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snd_sent = 0;
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snd_completed = 0;
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shm = &sn;
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shm->channels = 2;
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shm->samplebits = 16;
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shm->speed = 11025;
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memset(format, 0, sizeof(*format));
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format->wf.wFormatTag = WAVE_FORMAT_PCM;
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format->wf.nChannels = shm->channels;
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format->wBitsPerSample = shm->samplebits;
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format->wf.nSamplesPerSec = shm->speed;
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format->wf.nBlockAlign = format->wf.nChannels
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*format->wBitsPerSample / 8;
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format->wf.nAvgBytesPerSec = format->wf.nSamplesPerSec
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*format->wf.nBlockAlign;
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/* Open a waveform device for output using our callback function. */
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while ((hr = waveOutOpen((LPHWAVEOUT)&hWaveOut, WAVE_MAPPER,
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(LPWAVEFORMAT)format,
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(void (*)())mme_callback, 0,
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CALLBACK_FUNCTION | WAVE_OPEN_SHAREABLE))
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!= MMSYSERR_NOERROR)
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{
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if (hr != MMSYSERR_ALLOCATED) {
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mmeFreeMem(format);
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Sys_Printf ("waveOutOpen failed: %d\n", hr);
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return false;
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} else {
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Sys_Printf ("waveOutOpen failed 2222\n");
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}
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}
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mmeFreeMem(format);
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/*
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Allocate and lock memory for the waveform data. The memory
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for waveform data must be globally allocated with
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GMEM_MOVEABLE and GMEM_SHARE flags.
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*/
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gSndBufSize = WAV_BUFFERS*WAV_BUFFER_SIZE;
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lpData = mmeAllocBuffer(gSndBufSize);
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if (!lpData) {
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Sys_Printf ("Sound: Out of memory.\n");
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FreeSound ();
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return false;
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}
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memset (lpData, 0, gSndBufSize);
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/*
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Allocate and lock memory for the header. This memory must
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also be globally allocated with GMEM_MOVEABLE and
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GMEM_SHARE flags.
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*/
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lpWaveHdr = mmeAllocMem(sizeof(WAVEHDR) * WAV_BUFFERS);
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if (lpWaveHdr == NULL)
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{
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Sys_Printf ("Sound: Failed to Alloc header.\n");
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FreeSound ();
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return false;
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}
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memset (lpWaveHdr, 0, sizeof(WAVEHDR) * WAV_BUFFERS);
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/* After allocation, set up and prepare headers. */
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for (i=0 ; i<WAV_BUFFERS ; i++) {
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lpWaveHdr[i].dwBufferLength = WAV_BUFFER_SIZE;
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lpWaveHdr[i].lpData = lpData + i*WAV_BUFFER_SIZE;
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}
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shm->soundalive = true;
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shm->splitbuffer = false;
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shm->samples = gSndBufSize/(shm->samplebits/8);
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shm->samplepos = 0;
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shm->submission_chunk = 1;
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shm->buffer = (unsigned char *) lpData;
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sample16 = (shm->samplebits/8) - 1;
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wav_init = true;
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return true;
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}
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/*
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SNDDMA_Init
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Try to find a sound device to mix for.
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Returns false if nothing is found.
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*/
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static qboolean
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SNDDMA_Init ( void )
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{
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wav_init = 0;
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if (snd_firsttime || snd_iswave) {
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snd_iswave = SNDDMA_InitWav ();
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if (snd_iswave) {
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if (snd_firsttime)
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Sys_Printf ("Wave sound initialized\n");
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} else {
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Sys_Printf ("Wave sound failed to init\n");
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}
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}
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snd_firsttime = false;
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if (!wav_init) {
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if (snd_firsttime)
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Sys_Printf ("No sound device initialized\n");
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return 0;
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}
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return 1;
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}
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/*
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SNDDMA_GetDMAPos
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return the current sample position (in mono samples read)
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inside the recirculating dma buffer, so the mixing code will know
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how many sample are required to fill it up.
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*/
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static int
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SNDDMA_GetDMAPos ( void )
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{
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int s = 0;
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if (wav_init) {
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s = snd_sent * WAV_BUFFER_SIZE;
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}
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s >>= sample16;
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s &= (shm->samples-1);
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return s;
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}
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/*
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SNDDMA_Submit
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Send sound to device if buffer isn't really the dma buffer
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*/
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static void
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SNDDMA_Submit ( void )
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{
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int wResult;
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LPWAVEHDR h;
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if (!wav_init) return;
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if (mmeCheckForCallbacks()) mmeProcessCallbacks();
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if (snd_completed == snd_sent) {
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Sys_DPrintf ("Sound overrun\n");
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}
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// submit two new sound blocks
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while (((snd_sent - snd_completed) >> sample16) < 4)
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{
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int i = (snd_sent&WAV_MASK);
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h = lpWaveHdr + i;
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h->dwBufferLength = WAV_BUFFER_SIZE;
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h->lpData = lpData + i*WAV_BUFFER_SIZE;
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snd_sent++;
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/*
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Now the data block can be sent to the output device. The
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waveOutWrite function returns immediately and waveform
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data is sent to the output device in the background.
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*/
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wResult = waveOutWrite(hWaveOut, h, sizeof(WAVEHDR));
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if (wResult != MMSYSERR_NOERROR)
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{
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Sys_Printf ("Failed to write block to device\n");
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FreeSound ();
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return;
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}
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}
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}
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/*
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SNDDMA_Shutdown
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Reset the sound device for exiting
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*/
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static void
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SNDDMA_Shutdown ( void )
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{
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FreeSound ();
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}
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