snd_win.c

quake1 dos源代码最新版本

/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
#include "quakedef.h"
#include "winquake.h"

#define iDirectSoundCreate(a,b,c)	pDirectSoundCreate(a,b,c)

HRESULT (WINAPI *pDirectSoundCreate)(GUID FAR *lpGUID, LPDIRECTSOUND FAR *lplpDS, IUnknown FAR *pUnkOuter);

// 64K is > 1 second at 16-bit, 22050 Hz
#define	WAV_BUFFERS				64
#define	WAV_MASK				0x3F
#define	WAV_BUFFER_SIZE			0x0400
#define SECONDARY_BUFFER_SIZE	0x10000

typedef enum {SIS_SUCCESS, SIS_FAILURE, SIS_NOTAVAIL} sndinitstat;

static qboolean	wavonly;
static qboolean	dsound_init;
static qboolean	wav_init;
static qboolean	snd_firsttime = true, snd_isdirect, snd_iswave;
static qboolean	primary_format_set;

static int	sample16;
static int	snd_sent, snd_completed;


/*
 * Global variables. Must be visible to window-procedure function
 *  so it can unlock and free the data block after it has been played.
 */

HANDLE		hData;
HPSTR		lpData, lpData2;

HGLOBAL		hWaveHdr;
LPWAVEHDR	lpWaveHdr;

HWAVEOUT    hWaveOut;

WAVEOUTCAPS	wavecaps;

DWORD	gSndBufSize;

MMTIME		mmstarttime;

LPDIRECTSOUND pDS;
LPDIRECTSOUNDBUFFER pDSBuf, pDSPBuf;

HINSTANCE hInstDS;

//qboolean SNDDMA_InitDirect (void);	// 2001-12-10 Compilable with LCC-Win32 by Jeff Ford
qboolean SNDDMA_InitWav (void);


/*
==================
S_BlockSound
==================
*/
void S_BlockSound (void)
{

// DirectSound takes care of blocking itself
	if (snd_iswave)
	{
		snd_blocked++;

		if (snd_blocked == 1)
		{
			waveOutReset (hWaveOut);
		}
	}
}


/*
==================
S_UnblockSound
==================
*/
void S_UnblockSound (void)
{

// DirectSound takes care of blocking itself
	if (snd_iswave)
	{
		snd_blocked--;
	}
}


/*
==================
FreeSound
==================
*/
void FreeSound (void)
{
	int		i;

	if (pDSBuf)
	{
		pDSBuf->lpVtbl->Stop(pDSBuf);
		pDSBuf->lpVtbl->Release(pDSBuf);
	}

// only release primary buffer if it's not also the mixing buffer we just released
	if (pDSPBuf && (pDSBuf != pDSPBuf))
	{
		pDSPBuf->lpVtbl->Release(pDSPBuf);
	}

	if (pDS)
	{
		pDS->lpVtbl->SetCooperativeLevel (pDS, mainwindow, DSSCL_NORMAL);
		pDS->lpVtbl->Release(pDS);
	}

	if (hWaveOut)
	{
		waveOutReset (hWaveOut);

		if (lpWaveHdr)
		{
			for (i=0 ; i< WAV_BUFFERS ; i++)
				waveOutUnprepareHeader (hWaveOut, lpWaveHdr+i, sizeof(WAVEHDR));
		}

		waveOutClose (hWaveOut);

		if (hWaveHdr)
		{
			GlobalUnlock(hWaveHdr);
			GlobalFree(hWaveHdr);
		}

		if (hData)
		{
			GlobalUnlock(hData);
			GlobalFree(hData);
		}

	}

	pDS = NULL;
	pDSBuf = NULL;
	pDSPBuf = NULL;
	hWaveOut = 0;
	hData = 0;
	hWaveHdr = 0;
	lpData = NULL;
	lpWaveHdr = NULL;
	dsound_init = false;
	wav_init = false;
}


/*
==================
SNDDMA_InitDirect

Direct-Sound support
==================
*/
sndinitstat SNDDMA_InitDirect (void)
{
	DSBUFFERDESC	dsbuf;
	DSBCAPS			dsbcaps;
	DWORD			dwSize, dwWrite;
	DSCAPS			dscaps;
	WAVEFORMATEX	format, pformat;
	HRESULT			hresult;
	int				reps;

	memset ((void *)&sn, 0, sizeof (sn));

	shm = &sn;

	shm->channels = 2;
	shm->samplebits = 16;
	shm->speed = 11025;

	memset (&format, 0, sizeof(format));
	format.wFormatTag = WAVE_FORMAT_PCM;
    format.nChannels = shm->channels;
    format.wBitsPerSample = shm->samplebits;
    format.nSamplesPerSec = shm->speed;
    format.nBlockAlign = format.nChannels
		*format.wBitsPerSample / 8;
    format.cbSize = 0;
    format.nAvgBytesPerSec = format.nSamplesPerSec
		*format.nBlockAlign;

	if (!hInstDS)
	{
		hInstDS = LoadLibrary("dsound.dll");

		if (hInstDS == NULL)
		{
			Con_SafePrintf ("Couldn't load dsound.dll\n");
			return SIS_FAILURE;
		}

		pDirectSoundCreate = (void *)GetProcAddress(hInstDS,"DirectSoundCreate");

		if (!pDirectSoundCreate)
		{
			Con_SafePrintf ("Couldn't get DS proc addr\n");
			return SIS_FAILURE;
		}
	}

	while ((hresult = iDirectSoundCreate(NULL, &pDS, NULL)) != DS_OK)
	{
		if (hresult != DSERR_ALLOCATED)
		{
			Con_SafePrintf ("DirectSound create failed\n");
			return SIS_FAILURE;
		}

		if (MessageBox (NULL,
						"The sound hardware is in use by another app.\n\n"
					    "Select Retry to try to start sound again or Cancel to run Quake with no sound.",
						"Sound not available",
						MB_RETRYCANCEL | MB_SETFOREGROUND | MB_ICONEXCLAMATION) != IDRETRY)
		{
			Con_SafePrintf ("DirectSoundCreate failure\n"
							"  hardware already in use\n");
			return SIS_NOTAVAIL;
		}
	}

	dscaps.dwSize = sizeof(dscaps);

	if (DS_OK != pDS->lpVtbl->GetCaps (pDS, &dscaps))
	{
		Con_SafePrintf ("Couldn't get DS caps\n");
	}

	if (dscaps.dwFlags & DSCAPS_EMULDRIVER)
	{
		Con_SafePrintf ("No DirectSound driver installed\n");
		FreeSound ();
		return SIS_FAILURE;
	}

	if (DS_OK != pDS->lpVtbl->SetCooperativeLevel (pDS, mainwindow, DSSCL_EXCLUSIVE))
	{
		Con_SafePrintf ("Set coop level failed\n");
		FreeSound ();
		return SIS_FAILURE;
	}

// get access to the primary buffer, if possible, so we can set the
// sound hardware format
	memset (&dsbuf, 0, sizeof(dsbuf));
	dsbuf.dwSize = sizeof(DSBUFFERDESC);
	dsbuf.dwFlags = DSBCAPS_PRIMARYBUFFER;
	dsbuf.dwBufferBytes = 0;
	dsbuf.lpwfxFormat = NULL;

	memset(&dsbcaps, 0, sizeof(dsbcaps));
	dsbcaps.dwSize = sizeof(dsbcaps);
	primary_format_set = false;

	if (!COM_CheckParm ("-snoforceformat"))
	{
		if (DS_OK == pDS->lpVtbl->CreateSoundBuffer(pDS, &dsbuf, &pDSPBuf, NULL))
		{
			pformat = format;

			if (DS_OK != pDSPBuf->lpVtbl->SetFormat (pDSPBuf, &pformat))
			{
				if (snd_firsttime)
					Con_SafePrintf ("Set primary sound buffer format: no\n");
			}
			else
			{
				if (snd_firsttime)
					Con_SafePrintf ("Set primary sound buffer format: yes\n");

				primary_format_set = true;
			}
		}
	}

	if (!primary_format_set || !COM_CheckParm ("-primarysound"))
	{
	// create the secondary buffer we'll actually work with
		memset (&dsbuf, 0, sizeof(dsbuf));
		dsbuf.dwSize = sizeof(DSBUFFERDESC);
		dsbuf.dwFlags = DSBCAPS_CTRLFREQUENCY | DSBCAPS_LOCSOFTWARE;
		dsbuf.dwBufferBytes = SECONDARY_BUFFER_SIZE;
		dsbuf.lpwfxFormat = &format;

		memset(&dsbcaps, 0, sizeof(dsbcaps));
		dsbcaps.dwSize = sizeof(dsbcaps);

		if (DS_OK != pDS->lpVtbl->CreateSoundBuffer(pDS, &dsbuf, &pDSBuf, NULL))
		{
			Con_SafePrintf ("DS:CreateSoundBuffer Failed");
			FreeSound ();
			return SIS_FAILURE;
		}

		shm->channels = format.nChannels;
		shm->samplebits = format.wBitsPerSample;
		shm->speed = format.nSamplesPerSec;

		if (DS_OK != pDSBuf->lpVtbl->GetCaps (pDSBuf, &dsbcaps))
		{
			Con_SafePrintf ("DS:GetCaps failed\n");
			FreeSound ();
			return SIS_FAILURE;
		}

		if (snd_firsttime)
			Con_SafePrintf ("Using secondary sound buffer\n");
	}
	else
	{
		if (DS_OK != pDS->lpVtbl->SetCooperativeLevel (pDS, mainwindow, DSSCL_WRITEPRIMARY))
		{
			Con_SafePrintf ("Set coop level failed\n");
			FreeSound ();
			return SIS_FAILURE;
		}

		if (DS_OK != pDSPBuf->lpVtbl->GetCaps (pDSPBuf, &dsbcaps))
		{
			Con_Printf ("DS:GetCaps failed\n");
			return SIS_FAILURE;
		}

		pDSBuf = pDSPBuf;
		Con_SafePrintf ("Using primary sound buffer\n");
	}

	// Make sure mixer is active
	pDSBuf->lpVtbl->Play(pDSBuf, 0, 0, DSBPLAY_LOOPING);

	if (snd_firsttime)
		Con_SafePrintf("   %d channel(s)\n"
						"   %d bits/sample\n"
						"   %d bytes/sec\n",
						shm->channels, shm->samplebits, shm->speed);

	gSndBufSize = dsbcaps.dwBufferBytes;