mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-11-10 14:41:42 +00:00
295 lines
6.7 KiB
C
295 lines
6.7 KiB
C
/*
|
|
===========================================================================
|
|
Copyright (C) 1999-2005 Id Software, Inc.
|
|
|
|
This file is part of Quake III Arena source code.
|
|
|
|
Quake III Arena source code 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.
|
|
|
|
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
===========================================================================
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
|
|
#ifdef USE_LOCAL_HEADERS
|
|
# include "SDL.h"
|
|
#else
|
|
# include <SDL.h>
|
|
#endif
|
|
|
|
#include "../qcommon/q_shared.h"
|
|
#include "../client/snd_local.h"
|
|
|
|
qboolean snd_inited = qfalse;
|
|
|
|
cvar_t *s_sdlBits;
|
|
cvar_t *s_sdlSpeed;
|
|
cvar_t *s_sdlChannels;
|
|
cvar_t *s_sdlDevSamps;
|
|
cvar_t *s_sdlMixSamps;
|
|
|
|
/* The audio callback. All the magic happens here. */
|
|
static int dmapos = 0;
|
|
static int dmasize = 0;
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_AudioCallback
|
|
===============
|
|
*/
|
|
static void SNDDMA_AudioCallback(void *userdata, Uint8 *stream, int len)
|
|
{
|
|
int pos = (dmapos * (dma.samplebits/8));
|
|
if (pos >= dmasize)
|
|
dmapos = pos = 0;
|
|
|
|
if (!snd_inited) /* shouldn't happen, but just in case... */
|
|
{
|
|
memset(stream, '\0', len);
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
int tobufend = dmasize - pos; /* bytes to buffer's end. */
|
|
int len1 = len;
|
|
int len2 = 0;
|
|
|
|
if (len1 > tobufend)
|
|
{
|
|
len1 = tobufend;
|
|
len2 = len - len1;
|
|
}
|
|
memcpy(stream, dma.buffer + pos, len1);
|
|
if (len2 <= 0)
|
|
dmapos += (len1 / (dma.samplebits/8));
|
|
else /* wraparound? */
|
|
{
|
|
memcpy(stream+len1, dma.buffer, len2);
|
|
dmapos = (len2 / (dma.samplebits/8));
|
|
}
|
|
}
|
|
|
|
if (dmapos >= dmasize)
|
|
dmapos = 0;
|
|
}
|
|
|
|
static struct
|
|
{
|
|
Uint16 enumFormat;
|
|
char *stringFormat;
|
|
} formatToStringTable[ ] =
|
|
{
|
|
{ AUDIO_U8, "AUDIO_U8" },
|
|
{ AUDIO_S8, "AUDIO_S8" },
|
|
{ AUDIO_U16LSB, "AUDIO_U16LSB" },
|
|
{ AUDIO_S16LSB, "AUDIO_S16LSB" },
|
|
{ AUDIO_U16MSB, "AUDIO_U16MSB" },
|
|
{ AUDIO_S16MSB, "AUDIO_S16MSB" }
|
|
};
|
|
|
|
static int formatToStringTableSize = ARRAY_LEN( formatToStringTable );
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_PrintAudiospec
|
|
===============
|
|
*/
|
|
static void SNDDMA_PrintAudiospec(const char *str, const SDL_AudioSpec *spec)
|
|
{
|
|
int i;
|
|
char *fmt = NULL;
|
|
|
|
Com_Printf("%s:\n", str);
|
|
|
|
for( i = 0; i < formatToStringTableSize; i++ ) {
|
|
if( spec->format == formatToStringTable[ i ].enumFormat ) {
|
|
fmt = formatToStringTable[ i ].stringFormat;
|
|
}
|
|
}
|
|
|
|
if( fmt ) {
|
|
Com_Printf( " Format: %s\n", fmt );
|
|
} else {
|
|
Com_Printf( " Format: " S_COLOR_RED "UNKNOWN\n");
|
|
}
|
|
|
|
Com_Printf( " Freq: %d\n", (int) spec->freq );
|
|
Com_Printf( " Samples: %d\n", (int) spec->samples );
|
|
Com_Printf( " Channels: %d\n", (int) spec->channels );
|
|
}
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_Init
|
|
===============
|
|
*/
|
|
qboolean SNDDMA_Init(void)
|
|
{
|
|
SDL_AudioSpec desired;
|
|
SDL_AudioSpec obtained;
|
|
int tmp;
|
|
|
|
if (snd_inited)
|
|
return qtrue;
|
|
|
|
if (!s_sdlBits) {
|
|
s_sdlBits = Cvar_Get("s_sdlBits", "16", CVAR_ARCHIVE);
|
|
s_sdlSpeed = Cvar_Get("s_sdlSpeed", "0", CVAR_ARCHIVE);
|
|
s_sdlChannels = Cvar_Get("s_sdlChannels", "2", CVAR_ARCHIVE);
|
|
s_sdlDevSamps = Cvar_Get("s_sdlDevSamps", "0", CVAR_ARCHIVE);
|
|
s_sdlMixSamps = Cvar_Get("s_sdlMixSamps", "0", CVAR_ARCHIVE);
|
|
}
|
|
|
|
Com_Printf( "SDL_Init( SDL_INIT_AUDIO )... " );
|
|
|
|
if (!SDL_WasInit(SDL_INIT_AUDIO))
|
|
{
|
|
if (SDL_Init(SDL_INIT_AUDIO) != 0)
|
|
{
|
|
Com_Printf( "FAILED (%s)\n", SDL_GetError( ) );
|
|
return qfalse;
|
|
}
|
|
}
|
|
|
|
Com_Printf( "OK\n" );
|
|
|
|
Com_Printf( "SDL audio driver is \"%s\".\n", SDL_GetCurrentAudioDriver( ) );
|
|
|
|
memset(&desired, '\0', sizeof (desired));
|
|
memset(&obtained, '\0', sizeof (obtained));
|
|
|
|
tmp = ((int) s_sdlBits->value);
|
|
if ((tmp != 16) && (tmp != 8))
|
|
tmp = 16;
|
|
|
|
desired.freq = (int) s_sdlSpeed->value;
|
|
if(!desired.freq) desired.freq = 22050;
|
|
desired.format = ((tmp == 16) ? AUDIO_S16SYS : AUDIO_U8);
|
|
|
|
// I dunno if this is the best idea, but I'll give it a try...
|
|
// should probably check a cvar for this...
|
|
if (s_sdlDevSamps->value)
|
|
desired.samples = s_sdlDevSamps->value;
|
|
else
|
|
{
|
|
// just pick a sane default.
|
|
if (desired.freq <= 11025)
|
|
desired.samples = 256;
|
|
else if (desired.freq <= 22050)
|
|
desired.samples = 512;
|
|
else if (desired.freq <= 44100)
|
|
desired.samples = 1024;
|
|
else
|
|
desired.samples = 2048; // (*shrug*)
|
|
}
|
|
|
|
desired.channels = (int) s_sdlChannels->value;
|
|
desired.callback = SNDDMA_AudioCallback;
|
|
|
|
if (SDL_OpenAudio(&desired, &obtained) == -1)
|
|
{
|
|
Com_Printf("SDL_OpenAudio() failed: %s\n", SDL_GetError());
|
|
SDL_QuitSubSystem(SDL_INIT_AUDIO);
|
|
return qfalse;
|
|
}
|
|
|
|
SNDDMA_PrintAudiospec("SDL_AudioSpec", &obtained);
|
|
|
|
// dma.samples needs to be big, or id's mixer will just refuse to
|
|
// work at all; we need to keep it significantly bigger than the
|
|
// amount of SDL callback samples, and just copy a little each time
|
|
// the callback runs.
|
|
// 32768 is what the OSS driver filled in here on my system. I don't
|
|
// know if it's a good value overall, but at least we know it's
|
|
// reasonable...this is why I let the user override.
|
|
tmp = s_sdlMixSamps->value;
|
|
if (!tmp)
|
|
tmp = (obtained.samples * obtained.channels) * 10;
|
|
|
|
if (tmp & (tmp - 1)) // not a power of two? Seems to confuse something.
|
|
{
|
|
int val = 1;
|
|
while (val < tmp)
|
|
val <<= 1;
|
|
|
|
tmp = val;
|
|
}
|
|
|
|
dmapos = 0;
|
|
dma.samplebits = obtained.format & 0xFF; // first byte of format is bits.
|
|
dma.channels = obtained.channels;
|
|
dma.samples = tmp;
|
|
dma.submission_chunk = 1;
|
|
dma.speed = obtained.freq;
|
|
dmasize = (dma.samples * (dma.samplebits/8));
|
|
dma.buffer = calloc(1, dmasize);
|
|
|
|
Com_Printf("Starting SDL audio callback...\n");
|
|
SDL_PauseAudio(0); // start callback.
|
|
|
|
Com_Printf("SDL audio initialized.\n");
|
|
snd_inited = qtrue;
|
|
return qtrue;
|
|
}
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_GetDMAPos
|
|
===============
|
|
*/
|
|
int SNDDMA_GetDMAPos(void)
|
|
{
|
|
return dmapos;
|
|
}
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_Shutdown
|
|
===============
|
|
*/
|
|
void SNDDMA_Shutdown(void)
|
|
{
|
|
Com_Printf("Closing SDL audio device...\n");
|
|
SDL_PauseAudio(1);
|
|
SDL_CloseAudio();
|
|
SDL_QuitSubSystem(SDL_INIT_AUDIO);
|
|
free(dma.buffer);
|
|
dma.buffer = NULL;
|
|
dmapos = dmasize = 0;
|
|
snd_inited = qfalse;
|
|
Com_Printf("SDL audio device shut down.\n");
|
|
}
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_Submit
|
|
|
|
Send sound to device if buffer isn't really the dma buffer
|
|
===============
|
|
*/
|
|
void SNDDMA_Submit(void)
|
|
{
|
|
SDL_UnlockAudio();
|
|
}
|
|
|
|
/*
|
|
===============
|
|
SNDDMA_BeginPainting
|
|
===============
|
|
*/
|
|
void SNDDMA_BeginPainting (void)
|
|
{
|
|
SDL_LockAudio();
|
|
}
|