fteqw/engine/client/snd_linux.c

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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 <sys/soundcard.h>
#include <stdio.h>
#include "quakedef.h"
static int tryrates[] = { 11025, 22051, 44100, 8000 };
static void OSS_SetUnderWater(soundcardinfo_t *sc, qboolean underwater) //simply a stub. Any ideas how to actually implement this properly?
{
}
static unsigned int OSS_GetDMAPos(soundcardinfo_t *sc)
{
struct count_info count;
if (ioctl(sc->audio_fd, SNDCTL_DSP_GETOPTR, &count)==-1)
{
perror("/dev/dsp");
Con_Printf("Uh, sound dead.\n");
close(sc->audio_fd);
return 0;
}
// shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1);
// fprintf(stderr, "%d \r", count.ptr);
sc->sn.samplepos = count.ptr / (sc->sn.samplebits / 8);
return sc->sn.samplepos;
}
static void OSS_Shutdown(soundcardinfo_t *sc)
{
if (sc->sn.buffer) //close it properly, so we can go and restart it later.
munmap(sc->sn.buffer, sc->sn.samples * (sc->sn.samplebits/8));
if (sc->audio_fd)
close(sc->audio_fd);
*sc->name = '\0';
}
static void OSS_Submit(soundcardinfo_t *sc)
{
}
static void *OSS_Lock(soundcardinfo_t *sc)
{
return sc->sn.buffer;
}
static void OSS_Unlock(soundcardinfo_t *sc, void *buffer)
{
}
static int OSS_InitCard(soundcardinfo_t *sc, int cardnum)
{ //FIXME: implement snd_multipledevices somehow.
int rc;
int fmt;
int tmp;
int i;
char *s;
struct audio_buf_info info;
int caps;
char *snddev = NULL;
cvar_t *devname;
devname = Cvar_Get(va("snd_devicename%i", cardnum+1), cardnum?"":"/dev/dsp", 0, "Sound controls");
snddev = devname->string;
if (!*snddev)
return 2;
sc->inactive_sound = true; //linux sound devices always play sound, even when we're not the active app...
// open the sound device, confirm capability to mmap, and get size of dma buffer
Con_Printf("Initing OSS sound device %s\n", snddev);
sc->audio_fd = open(snddev, O_RDWR | O_NONBLOCK); //try the primary device
if (sc->audio_fd < 0)
{
perror(snddev);
Con_Printf("Could not open %s\n", snddev);
OSS_Shutdown(sc);
return 0;
}
Q_strncpyz(sc->name, snddev, sizeof(sc->name));
rc = ioctl(sc->audio_fd, SNDCTL_DSP_RESET, 0);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not reset %s\n", snddev);
OSS_Shutdown(sc);
return 0;
}
if (ioctl(sc->audio_fd, SNDCTL_DSP_GETCAPS, &caps)==-1)
{
perror(snddev);
Con_Printf("Sound driver too old\n");
OSS_Shutdown(sc);
return 0;
}
if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP))
{
Con_Printf("Sorry but your soundcard can't do this\n");
OSS_Shutdown(sc);
return 0;
}
if (ioctl(sc->audio_fd, SNDCTL_DSP_GETOSPACE, &info)==-1)
{
perror("GETOSPACE");
Con_Printf("Um, can't do GETOSPACE?\n");
OSS_Shutdown(sc);
return 0;
}
sc->sn.splitbuffer = 0;
// set sample bits & speed
s = getenv("QUAKE_SOUND_SAMPLEBITS");
if (s) sc->sn.samplebits = atoi(s);
else if ((i = COM_CheckParm("-sndbits")) != 0)
sc->sn.samplebits = atoi(com_argv[i+1]);
if (sc->sn.samplebits != 16 && sc->sn.samplebits != 8)
{
ioctl(sc->audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
if (fmt & AFMT_S16_LE)
sc->sn.samplebits = 16;
else if (fmt & AFMT_U8)
sc->sn.samplebits = 8;
}
s = getenv("QUAKE_SOUND_SPEED");
if (s)
sc->sn.speed = atoi(s);
else if ((i = COM_CheckParm("-sndspeed")) != 0)
sc->sn.speed = atoi(com_argv[i+1]);
else
{
if (!sc->sn.speed || ioctl(sc->audio_fd, SNDCTL_DSP_SPEED, &sc->sn.speed)) //use the default - menu set value.
{ //humph, default didn't work. Go for random preset ones that should work.
for (i=0 ; i<sizeof(tryrates)/4 ; i++)
if (!ioctl(sc->audio_fd, SNDCTL_DSP_SPEED, &tryrates[i])) break;
sc->sn.speed = tryrates[i];
}
}
s = getenv("QUAKE_SOUND_CHANNELS");
if (s) sc->sn.numchannels = atoi(s);
else if ((i = COM_CheckParm("-sndmono")) != 0)
sc->sn.numchannels = 1;
else if ((i = COM_CheckParm("-sndstereo")) != 0)
sc->sn.numchannels = 2;
else sc->sn.numchannels = 2;
sc->sn.samples = info.fragstotal * info.fragsize / (sc->sn.samplebits/8);
sc->sn.submission_chunk = 1;
// memory map the dma buffer
sc->sn.buffer = (unsigned char *) mmap(NULL, info.fragstotal
* info.fragsize, PROT_WRITE, MAP_FILE|MAP_SHARED, sc->audio_fd, 0);
if (!sc->sn.buffer)
{
perror(snddev);
Con_Printf("Could not mmap %s\n", snddev);
OSS_Shutdown(sc);
return 0;
}
tmp = 0;
if (sc->sn.numchannels == 2)
tmp = 1;
rc = ioctl(sc->audio_fd, SNDCTL_DSP_STEREO, &tmp);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not set %s to stereo=%d", snddev, sc->sn.numchannels);
OSS_Shutdown(sc);
return 0;
}
if (tmp)
sc->sn.numchannels = 2;
else
sc->sn.numchannels = 1;
rc = ioctl(sc->audio_fd, SNDCTL_DSP_SPEED, &sc->sn.speed);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not set %s speed to %d", snddev, sc->sn.speed);
OSS_Shutdown(sc);
return 0;
}
if (sc->sn.samplebits == 16)
{
rc = AFMT_S16_LE;
rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETFMT, &rc);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not support 16-bit data. Try 8-bit.\n");
OSS_Shutdown(sc);
return 0;
}
}
else if (sc->sn.samplebits == 8)
{
rc = AFMT_U8;
rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETFMT, &rc);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not support 8-bit data.\n");
OSS_Shutdown(sc);
return 0;
}
}
else
{
perror(snddev);
Con_Printf("%d-bit sound not supported.", sc->sn.samplebits);
OSS_Shutdown(sc);
return 0;
}
// toggle the trigger & start her up
tmp = 0;
rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not toggle.\n");
OSS_Shutdown(sc);
return 0;
}
tmp = PCM_ENABLE_OUTPUT;
rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
if (rc < 0)
{
perror(snddev);
Con_Printf("Could not toggle.\n");
OSS_Shutdown(sc);
return 0;
}
sc->sn.samplepos = 0;
sc->Lock = OSS_Lock;
sc->Unlock = OSS_Unlock;
sc->SetWaterDistortion = OSS_SetUnderWater;
sc->Submit = OSS_Submit;
sc->Shutdown = OSS_Shutdown;
sc->GetDMAPos = OSS_GetDMAPos;
return 1;
}
int (*pOSS_InitCard) (soundcardinfo_t *sc, int cardnum) = &OSS_InitCard;