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/* |
Copyright (C) 1996-1997 Id Software, Inc. |
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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. |
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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. |
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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 |
along with this program; if not, write to the Free Software |
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
#include <unistd.h> |
#include <fcntl.h> |
#include <stdlib.h> |
#include <sys/types.h> |
#include <sys/ioctl.h> |
#include <sys/mman.h> |
#include <sys/shm.h> |
#include <sys/wait.h> |
#include <linux/soundcard.h> |
#include <stdio.h> |
#include "quakedef.h" |
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int audio_fd; |
int snd_inited; |
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static int tryrates[] = { 11025, 22051, 44100, 8000 }; |
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qboolean SNDDMA_Init(void) |
{ |
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int rc; |
int fmt; |
int tmp; |
int i; |
char *s; |
struct audio_buf_info info; |
int caps; |
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snd_inited = 0; |
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// open /dev/dsp, confirm capability to mmap, and get size of dma buffer |
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audio_fd = open("/dev/dsp", O_RDWR); |
if (audio_fd < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not open /dev/dsp\n"); |
return 0; |
} |
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rc = ioctl(audio_fd, SNDCTL_DSP_RESET, 0); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not reset /dev/dsp\n"); |
close(audio_fd); |
return 0; |
} |
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if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &caps)==-1) |
{ |
perror("/dev/dsp"); |
Con_Printf("Sound driver too old\n"); |
close(audio_fd); |
return 0; |
} |
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if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP)) |
{ |
Con_Printf("Sorry but your soundcard can't do this\n"); |
close(audio_fd); |
return 0; |
} |
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if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info)==-1) |
{ |
perror("GETOSPACE"); |
Con_Printf("Um, can't do GETOSPACE?\n"); |
close(audio_fd); |
return 0; |
} |
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shm = &sn; |
shm->splitbuffer = 0; |
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// set sample bits & speed |
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s = getenv("QUAKE_SOUND_SAMPLEBITS"); |
if (s) shm->samplebits = atoi(s); |
else if ((i = COM_CheckParm("-sndbits")) != 0) |
shm->samplebits = atoi(com_argv[i+1]); |
if (shm->samplebits != 16 && shm->samplebits != 8) |
{ |
ioctl(audio_fd, SNDCTL_DSP_GETFMTS, &fmt); |
if (fmt & AFMT_S16_LE) shm->samplebits = 16; |
else if (fmt & AFMT_U8) shm->samplebits = 8; |
} |
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s = getenv("QUAKE_SOUND_SPEED"); |
if (s) shm->speed = atoi(s); |
else if ((i = COM_CheckParm("-sndspeed")) != 0) |
shm->speed = atoi(com_argv[i+1]); |
else |
{ |
for (i=0 ; i<sizeof(tryrates)/4 ; i++) |
if (!ioctl(audio_fd, SNDCTL_DSP_SPEED, &tryrates[i])) break; |
shm->speed = tryrates[i]; |
} |
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s = getenv("QUAKE_SOUND_CHANNELS"); |
if (s) shm->channels = atoi(s); |
else if ((i = COM_CheckParm("-sndmono")) != 0) |
shm->channels = 1; |
else if ((i = COM_CheckParm("-sndstereo")) != 0) |
shm->channels = 2; |
else shm->channels = 2; |
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shm->samples = info.fragstotal * info.fragsize / (shm->samplebits/8); |
shm->submission_chunk = 1; |
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// memory map the dma buffer |
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shm->buffer = (unsigned char *) mmap(NULL, info.fragstotal |
* info.fragsize, PROT_WRITE, MAP_FILE|MAP_SHARED, audio_fd, 0); |
if (!shm->buffer || shm->buffer == (unsigned char *)-1) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not mmap /dev/dsp\n"); |
close(audio_fd); |
return 0; |
} |
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tmp = 0; |
if (shm->channels == 2) |
tmp = 1; |
rc = ioctl(audio_fd, SNDCTL_DSP_STEREO, &tmp); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not set /dev/dsp to stereo=%d", shm->channels); |
close(audio_fd); |
return 0; |
} |
if (tmp) |
shm->channels = 2; |
else |
shm->channels = 1; |
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rc = ioctl(audio_fd, SNDCTL_DSP_SPEED, &shm->speed); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not set /dev/dsp speed to %d", shm->speed); |
close(audio_fd); |
return 0; |
} |
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if (shm->samplebits == 16) |
{ |
rc = AFMT_S16_LE; |
rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &rc); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not support 16-bit data. Try 8-bit.\n"); |
close(audio_fd); |
return 0; |
} |
} |
else if (shm->samplebits == 8) |
{ |
rc = AFMT_U8; |
rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &rc); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not support 8-bit data.\n"); |
close(audio_fd); |
return 0; |
} |
} |
else |
{ |
perror("/dev/dsp"); |
Con_Printf("%d-bit sound not supported.", shm->samplebits); |
close(audio_fd); |
return 0; |
} |
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// toggle the trigger & start her up |
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tmp = 0; |
rc = ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not toggle.\n"); |
close(audio_fd); |
return 0; |
} |
tmp = PCM_ENABLE_OUTPUT; |
rc = ioctl(audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp); |
if (rc < 0) |
{ |
perror("/dev/dsp"); |
Con_Printf("Could not toggle.\n"); |
close(audio_fd); |
return 0; |
} |
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shm->samplepos = 0; |
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snd_inited = 1; |
return 1; |
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} |
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int SNDDMA_GetDMAPos(void) |
{ |
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struct count_info count; |
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if (!snd_inited) return 0; |
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if (ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &count)==-1) |
{ |
perror("/dev/dsp"); |
Con_Printf("Uh, sound dead.\n"); |
close(audio_fd); |
snd_inited = 0; |
return 0; |
} |
// shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1); |
// fprintf(stderr, "%d \r", count.ptr); |
shm->samplepos = count.ptr / (shm->samplebits / 8); |
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return shm->samplepos; |
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} |
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void SNDDMA_Shutdown(void) |
{ |
if (snd_inited) |
{ |
close(audio_fd); |
snd_inited = 0; |
} |
} |
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/* |
============== |
SNDDMA_Submit |
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Send sound to device if buffer isn't really the dma buffer |
=============== |
*/ |
void SNDDMA_Submit(void) |
{ |
} |
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