Date: Wed, 29 Dec 1999 00:58:10 -0500 From: "Charles Anderson" <caa@columbus.rr.com> To: freebsd-multimedia@freebsd.org, FreeBSD Current <freebsd-current@freebsd.org> Subject: mmaping /dev/dsp problems Message-ID: <19991229005714.C79763@midgard.dhs.org>
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[-- Attachment #1 --]
Hello,
I'm trying to get the quake 1 source to compile and work under freebsd with glx.
Most of the graphics parts work, and I can play, but I can't seem to get it to
mmap the dsp dma buffer like it wants to.
I have ripped out part of the code to demonstrate the problem. All I had to
change to get it to compile this was to include machine/soundcard.h instead of
linux/soundcard.h, but that doesn't seem to be enough to get it to work.
I'm running -current with newpcm as of Dec 13, I know it's not the latest, but
not much has changed in the dsp code lately. I'll build a new world tomorrow,
and try it out.
I have attached the files snd_linux.c & sound.h
When I run snd_linux I get
opening /dev/dsp
audio_fd /dev/dsp=3
about to map 63488 bytes to /dev/dsp
shm->buffer=280eb000
Segmentation fault (core dumped)
bash-2.02$
gdb has this to say about shm->buffer (what mmap returns)
$3 = (
unsigned char *) 0x280eb000 <Error reading address 0x280eb000: Bad address>
Thanks, for any help.
-Charlie
--
Charles Anderson caa@columbus.rr.com
No quote, no nothin'
[-- Attachment #2 --]
/*
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 <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 <machine/soundcard.h>
#include <stdio.h>
#include "sound.h"
int audio_fd;
int snd_inited;
static int tryrates[] = { 11025, 22051, 44100, 8000 };
#define Con_Printf printf
dma_t *shm;
qboolean SNDDMA_Init(void)
{
dma_t sn;
int rc;
int fmt;
int tmp;
int i;
char *s;
struct audio_buf_info info;
int caps;
snd_inited = 0;
// open /dev/dsp, confirm capability to mmap, and get size of dma buffer
Con_Printf("opening /dev/dsp\n");
audio_fd = open("/dev/dsp", O_RDWR);
if (audio_fd < 0)
{
perror("/dev/dsp");
Con_Printf("Could not open /dev/dsp\n");
return 0;
}
Con_Printf("audio_fd /dev/dsp=%d\n", audio_fd);
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;
}
if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &caps)==-1)
{
perror("/dev/dsp");
Con_Printf("Sound driver too old\n");
close(audio_fd);
return 0;
}
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;
}
if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info)==-1)
{
perror("GETOSPACE");
Con_Printf("Um, can't do GETOSPACE?\n");
close(audio_fd);
return 0;
}
shm = &sn;
shm->splitbuffer = 0;
// set sample bits & speed
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;
}
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];
}
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;
shm->samples = info.fragstotal * info.fragsize / (shm->samplebits/8);
shm->submission_chunk = 1;
// memory map the dma buffer
Con_Printf("about to map %d bytes to /dev/dsp\n", info.fragstotal * info.fragsize);
shm->buffer = (unsigned char *) mmap(NULL, info.fragstotal
* info.fragsize, PROT_WRITE, 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;
}
Con_Printf("shm->buffer=%lx\n", shm->buffer);
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;
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;
}
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;
}
// toggle the trigger & start her up
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;
}
shm->samplepos = 0;
snd_inited = 1;
return 1;
}
main()
{
SNDDMA_Init();
memset(shm->buffer, 0, 2048);
}
[-- Attachment #3 --]
/*
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.
*/
// sound.h -- client sound i/o functions
#ifndef __SOUND__
#define __SOUND__
#define DEFAULT_SOUND_PACKET_VOLUME 255
#define DEFAULT_SOUND_PACKET_ATTENUATION 1.0
typedef enum {false, true} qboolean;
// !!! if this is changed, it much be changed in asm_i386.h too !!!
typedef struct
{
int left;
int right;
} portable_samplepair_t;
#if 0
typedef struct sfx_s
{
char name[MAX_QPATH];
cache_user_t cache;
} sfx_t;
// !!! if this is changed, it much be changed in asm_i386.h too !!!
typedef struct
{
int length;
int loopstart;
int speed;
int width;
int stereo;
byte data[1]; // variable sized
} sfxcache_t;
#endif
typedef struct
{
qboolean gamealive;
qboolean soundalive;
qboolean splitbuffer;
int channels;
int samples; // mono samples in buffer
int submission_chunk; // don't mix less than this #
int samplepos; // in mono samples
int samplebits;
int speed;
unsigned char *buffer;
} dma_t;
#if 0
// !!! if this is changed, it much be changed in asm_i386.h too !!!
typedef struct
{
sfx_t *sfx; // sfx number
int leftvol; // 0-255 volume
int rightvol; // 0-255 volume
int end; // end time in global paintsamples
int pos; // sample position in sfx
int looping; // where to loop, -1 = no looping
int entnum; // to allow overriding a specific sound
int entchannel; //
vec3_t origin; // origin of sound effect
vec_t dist_mult; // distance multiplier (attenuation/clipK)
int master_vol; // 0-255 master volume
} channel_t;
typedef struct
{
int rate;
int width;
int channels;
int loopstart;
int samples;
int dataofs; // chunk starts this many bytes from file start
} wavinfo_t;
void S_Init (void);
void S_Startup (void);
void S_Shutdown (void);
void S_StartSound (int entnum, int entchannel, sfx_t *sfx, vec3_t origin, float fvol, float attenuation);
void S_StaticSound (sfx_t *sfx, vec3_t origin, float vol, float attenuation);
void S_StopSound (int entnum, int entchannel);
void S_StopAllSounds(qboolean clear);
void S_ClearBuffer (void);
void S_Update (vec3_t origin, vec3_t v_forward, vec3_t v_right, vec3_t v_up);
void S_ExtraUpdate (void);
sfx_t *S_PrecacheSound (char *sample);
void S_TouchSound (char *sample);
void S_ClearPrecache (void);
void S_BeginPrecaching (void);
void S_EndPrecaching (void);
void S_PaintChannels(int endtime);
void S_InitPaintChannels (void);
// picks a channel based on priorities, empty slots, number of channels
channel_t *SND_PickChannel(int entnum, int entchannel);
// spatializes a channel
void SND_Spatialize(channel_t *ch);
// initializes cycling through a DMA buffer and returns information on it
qboolean SNDDMA_Init(void);
// gets the current DMA position
int SNDDMA_GetDMAPos(void);
// shutdown the DMA xfer.
void SNDDMA_Shutdown(void);
// ====================================================================
// User-setable variables
// ====================================================================
#define MAX_CHANNELS 128
#define MAX_DYNAMIC_CHANNELS 8
extern channel_t channels[MAX_CHANNELS];
// 0 to MAX_DYNAMIC_CHANNELS-1 = normal entity sounds
// MAX_DYNAMIC_CHANNELS to MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS -1 = water, etc
// MAX_DYNAMIC_CHANNELS + NUM_AMBIENTS to total_channels = static sounds
extern int total_channels;
//
// Fake dma is a synchronous faking of the DMA progress used for
// isolating performance in the renderer. The fakedma_updates is
// number of times S_Update() is called per second.
//
extern qboolean fakedma;
extern int fakedma_updates;
extern int paintedtime;
extern vec3_t listener_origin;
extern vec3_t listener_forward;
extern vec3_t listener_right;
extern vec3_t listener_up;
extern volatile dma_t *shm;
extern volatile dma_t sn;
extern vec_t sound_nominal_clip_dist;
extern cvar_t loadas8bit;
extern cvar_t bgmvolume;
extern cvar_t volume;
extern qboolean snd_initialized;
extern int snd_blocked;
void S_LocalSound (char *s);
sfxcache_t *S_LoadSound (sfx_t *s);
wavinfo_t GetWavinfo (char *name, byte *wav, int wavlength);
void SND_InitScaletable (void);
void SNDDMA_Submit(void);
void S_AmbientOff (void);
void S_AmbientOn (void);
#endif
#endif
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