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quakeforge/libs/audio/targets/snd_win.c

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/*
snd_win.c
(description)
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#define CINTERFACE
#include "winquake.h"
#include "QF/cvar.h"
#include "QF/plugin.h"
#include "QF/qargs.h"
#include "QF/sys.h"
#include "snd_render.h"
// 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 snd_firsttime = true;
static int sample16;
static int snd_sent, snd_completed;
static int snd_blocked = 0;
static volatile dma_t sn;
/*
Global variables. Must be visible to window-procedure function
so it can unlock and free the data block after it has been played.
*/
static HANDLE hData;
static HPSTR lpData;//, lpData2;
static HGLOBAL hWaveHdr;
static LPWAVEHDR lpWaveHdr;
static HWAVEOUT hWaveOut;
//static WAVEOUTCAPS wavecaps;
static DWORD gSndBufSize;
static qboolean SNDDMA_InitWav (void);
static cvar_t *snd_stereo;
static cvar_t *snd_rate;
static cvar_t *snd_bits;
static plugin_t plugin_info;
static plugin_data_t plugin_info_data;
static plugin_funcs_t plugin_info_funcs;
static general_data_t plugin_info_general_data;
static general_funcs_t plugin_info_general_funcs;
static snd_output_data_t plugin_info_snd_output_data;
static snd_output_funcs_t plugin_info_snd_output_funcs;
static void
SNDDMA_Init_Cvars (void)
{
snd_stereo = Cvar_Get ("snd_stereo", "1", CVAR_ROM, NULL,
"sound stereo output");
snd_rate = Cvar_Get ("snd_rate", "11025", CVAR_ROM, NULL,
"sound playback rate. 0 is system default");
snd_bits = Cvar_Get ("snd_bits", "16", CVAR_ROM, NULL,
"sound sample depth. 0 is system default");
}
static void
SNDDMA_BlockSound (void)
{
if (++snd_blocked == 1)
waveOutReset (hWaveOut);
}
static void
SNDDMA_UnblockSound (void)
{
if (!snd_blocked)
--snd_blocked;
}
static void
FreeSound (void)
{
int i;
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);
}
}
hWaveOut = 0;
hData = 0;
hWaveHdr = 0;
lpData = NULL;
lpWaveHdr = NULL;
}
/*
SNDDM_InitWav
Crappy windows multimedia base
*/
static qboolean
SNDDMA_InitWav (void)
{
int i;
HRESULT hr;
WAVEFORMATEX format;
snd_sent = 0;
snd_completed = 0;
if (!snd_stereo->int_val) {
sn.channels = 1;
} else {
sn.channels = 2;
}
sn.samplebits = snd_bits->int_val;
sn.speed = snd_rate->int_val;
memset (&format, 0, sizeof (format));
format.wFormatTag = WAVE_FORMAT_PCM;
format.nChannels = sn.channels;
format.wBitsPerSample = sn.samplebits;
format.nSamplesPerSec = sn.speed;
format.nBlockAlign = format.nChannels * format.wBitsPerSample / 8;
format.cbSize = 0;
format.nAvgBytesPerSec = format.nSamplesPerSec * format.nBlockAlign;
/* Open a waveform device for output using window callback. */
while ((hr = waveOutOpen ((LPHWAVEOUT) & hWaveOut, WAVE_MAPPER,
&format, 0, 0L,
CALLBACK_NULL)) != MMSYSERR_NOERROR) {
if (hr != MMSYSERR_ALLOCATED) {
Sys_Printf ("waveOutOpen failed\n");
return false;
}
Sys_Printf ("waveOutOpen failure;\n" " hardware already in use\n");
return false;
}
/*
Allocate and lock memory for the waveform data. The memory
for waveform data must be globally allocated with
GMEM_MOVEABLE and GMEM_SHARE flags.
*/
gSndBufSize = WAV_BUFFERS * WAV_BUFFER_SIZE;
hData = GlobalAlloc (GMEM_MOVEABLE | GMEM_SHARE, gSndBufSize);
if (!hData) {
Sys_Printf ("Sound: Out of memory.\n");
FreeSound ();
return false;
}
lpData = GlobalLock (hData);
if (!lpData) {
Sys_Printf ("Sound: Failed to lock.\n");
FreeSound ();
return false;
}
memset (lpData, 0, gSndBufSize);
/*
* Allocate and lock memory for the header. This memory must
* also be globally allocated with GMEM_MOVEABLE and
* GMEM_SHARE flags.
*/
hWaveHdr = GlobalAlloc (GMEM_MOVEABLE | GMEM_SHARE,
(DWORD) sizeof (WAVEHDR) * WAV_BUFFERS);
if (hWaveHdr == NULL) {
Sys_Printf ("Sound: Failed to Alloc header.\n");
FreeSound ();
return false;
}
lpWaveHdr = (LPWAVEHDR) GlobalLock (hWaveHdr);
if (lpWaveHdr == NULL) {
Sys_Printf ("Sound: Failed to lock header.\n");
FreeSound ();
return false;
}
memset (lpWaveHdr, 0, sizeof (WAVEHDR) * WAV_BUFFERS);
/* After allocation, set up and prepare headers. */
for (i = 0; i < WAV_BUFFERS; i++) {
lpWaveHdr[i].dwBufferLength = WAV_BUFFER_SIZE;
lpWaveHdr[i].lpData = lpData + i * WAV_BUFFER_SIZE;
if (waveOutPrepareHeader (hWaveOut, lpWaveHdr + i, sizeof (WAVEHDR)) !=
MMSYSERR_NOERROR) {
Sys_Printf ("Sound: failed to prepare wave headers\n");
FreeSound ();
return false;
}
}
sn.samples = gSndBufSize / (sn.samplebits / 8);
sn.samplepos = 0;
sn.submission_chunk = 1;
sn.buffer = (unsigned char *) lpData;
sample16 = (sn.samplebits / 8) - 1;
return true;
}
/*
SNDDMA_Init
Try to find a sound device to mix for.
Returns false if nothing is found.
*/
static volatile dma_t *
SNDDMA_Init (void)
{
if (snd_firsttime) {
if (SNDDMA_InitWav ()) {
Sys_Printf ("Wave sound initialized\n");
} else {
Sys_Printf ("Wave sound failed to init\n");
}
}
snd_firsttime = false;
return &sn;
}
/*
SNDDMA_GetDMAPos
return the current sample position (in mono samples read)
inside the recirculating dma buffer, so the mixing code will know
how many sample are required to fill it up.
*/
static int
SNDDMA_GetDMAPos (void)
{
int s = 0;
s = snd_sent * WAV_BUFFER_SIZE;
s >>= sample16;
s &= (sn.samples - 1);
return s;
}
/*
SNDDMA_Submit
Send sound to device if buffer isn't really the dma buffer
*/
static void
SNDDMA_Submit (void)
{
int wResult;
LPWAVEHDR h;
// find which sound blocks have completed
while (1) {
if (snd_completed == snd_sent) {
Sys_DPrintf ("Sound overrun\n");
break;
}
if (!(lpWaveHdr[snd_completed & WAV_MASK].dwFlags & WHDR_DONE)) {
break;
}
snd_completed++; // this buffer has been played
}
// submit two new sound blocks
while (((snd_sent - snd_completed) >> sample16) < 4) {
h = lpWaveHdr + (snd_sent & WAV_MASK);
snd_sent++;
/*
Now the data block can be sent to the output device. The
waveOutWrite function returns immediately and waveform
data is sent to the output device in the background.
*/
wResult = waveOutWrite (hWaveOut, h, sizeof (WAVEHDR));
if (wResult != MMSYSERR_NOERROR) {
Sys_Printf ("Failed to write block to device\n");
FreeSound ();
return;
}
}
}
/*
SNDDMA_Shutdown
Reset the sound device for exiting
*/
static void
SNDDMA_Shutdown (void)
{
FreeSound ();
}
PLUGIN_INFO(snd_output, win)
{
plugin_info.type = qfp_snd_output;
plugin_info.api_version = QFPLUGIN_VERSION;
plugin_info.plugin_version = "0.1";
plugin_info.description = "Windows digital output";
plugin_info.copyright = "Copyright (C) 1996-1997 id Software, Inc.\n"
"Copyright (C) 1999,2000,2001 contributors of the QuakeForge "
"project\n"
"Please see the file \"AUTHORS\" for a list of contributors";
plugin_info.functions = &plugin_info_funcs;
plugin_info.data = &plugin_info_data;
plugin_info_data.general = &plugin_info_general_data;
plugin_info_data.input = NULL;
plugin_info_data.snd_output = &plugin_info_snd_output_data;
plugin_info_funcs.general = &plugin_info_general_funcs;
plugin_info_funcs.input = NULL;
plugin_info_funcs.snd_output = &plugin_info_snd_output_funcs;
plugin_info_general_funcs.p_Init = SNDDMA_Init_Cvars;
plugin_info_general_funcs.p_Shutdown = NULL;
plugin_info_snd_output_funcs.pS_O_Init = SNDDMA_Init;
plugin_info_snd_output_funcs.pS_O_Shutdown = SNDDMA_Shutdown;
plugin_info_snd_output_funcs.pS_O_GetDMAPos = SNDDMA_GetDMAPos;
plugin_info_snd_output_funcs.pS_O_Submit = SNDDMA_Submit;
plugin_info_snd_output_funcs.pS_O_BlockSound = SNDDMA_BlockSound;
plugin_info_snd_output_funcs.pS_O_UnblockSound = SNDDMA_UnblockSound;
return &plugin_info;
}
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