406 lines
9.3 KiB
C
406 lines
9.3 KiB
C
/*
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Copyright (C) 2015 Marco "eukara" Hladik
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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
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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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,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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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
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/shm.h>
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#include <sys/wait.h>
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#include <linux/soundcard.h>
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#include <stdio.h>
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#include <errno.h>
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#include "globaldef.h"
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#define Q_strcpy(dest, src, size) Q_strncpy((dest), (size), (src), Q_MAXINT)
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#ifndef SNDCTL_DSP_COOKEDMODE
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# define SNDCTL_DSP_COOKEDMODE _SIOW ('P', 30, int)
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#endif
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int Q_strncpy (char *dest, int bufsize, const char *src, int count)
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{
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char *start = dest;
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// if (bufsize-1 < count)
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// count = bufsize-1;
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if (bufsize <= 0)
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return 0;
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if (count > 0)
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{
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while (*src && count-- && --bufsize) // NOTE: order is important; count must be dec'd *before* bufsize
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*dest++ = *src++;
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}
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*dest = 0;
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#if _DEBUG
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if (!bufsize)
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{
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char tmp[16];
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strncpy (tmp, start, 12);
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tmp[12] = 0;
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Con_DPrintf ("\x02""WARNING: overflow in Q_strncpy (\"%s...\")\n", tmp);
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}
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#endif
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return dest-start;
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}
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static qboolean snd_useoss = true;
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int audio_fd = -1;
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qboolean snd_inited;
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static const int tryrates[] = { 11025, 22050, 22051, 44100, 48000, 8000 };
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static char snd_dev[64] = "/dev/dsp";
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qboolean SNDDMA_InitOSS_Direct (char **errstr)
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{
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int caps, tmp, rc;
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struct audio_buf_info info;
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if (ioctl(audio_fd, SNDCTL_DSP_GETCAPS, &caps) == -1)
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{
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perror (snd_dev);
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*errstr = "Cannot determine capabilities of soundcard\n";
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return false;
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}
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if (!(caps & DSP_CAP_TRIGGER) || !(caps & DSP_CAP_MMAP))
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{
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*errstr = "Soundcard doesn't support necessary features\n";
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return false;
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}
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if (ioctl(audio_fd, SNDCTL_DSP_GETOSPACE, &info) == -1)
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{
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perror ("GETOSPACE");
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*errstr = "Um, can't do GETOSPACE?\n";
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return false;
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}
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shm->samples = info.fragstotal * info.fragsize / (shm->samplebits / 8);
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// 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);
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if (!shm->buffer || shm->buffer == (unsigned char *)MAP_FAILED)
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{
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perror (snd_dev);
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*errstr = va ("Could not mmap %s (error %d)\n", snd_dev, errno);
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return false;
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}
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// toggle the trigger & start her up
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tmp = 0;
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rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
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if (rc < 0)
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{
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perror (snd_dev);
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*errstr = "Could not toggle.\n";
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return false;
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}
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tmp = PCM_ENABLE_OUTPUT;
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rc = ioctl (audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
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if (rc < 0)
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{
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perror (snd_dev);
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*errstr = "Could not toggle.\n";
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return false;
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}
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return true;
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}
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#define NB_FRAGMENTS 4
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static int old_osstime = 0;
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static unsigned int osssoundtime;
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qboolean SNDDMA_InitOSS_Indirect (char **errstr)
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{
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int flags, ioctl_param;
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unsigned int fragmentsize, i, val;
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// Use non-blocking IOs if possible
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flags = fcntl(audio_fd, F_GETFL);
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if (flags != -1)
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{
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if (fcntl(audio_fd, F_SETFL, flags | O_NONBLOCK) == -1)
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Con_Print ("SndSys_Init : fcntl(F_SETFL, O_NONBLOCK) failed!\n");
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}
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else
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Con_Print ("SndSys_Init: fcntl(F_GETFL) failed!\n");
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// Set the fragment size (up to "NB_FRAGMENTS" fragments of "fragmentsize" bytes)
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fragmentsize = shm->speed * shm->channels * (shm->samplebits/8) / 10;
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fragmentsize = (unsigned int)ceilf((float)fragmentsize / (float)NB_FRAGMENTS);
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//fragmentsize = CeilPowerOf2(fragmentsize);
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//ioctl_param = (NB_FRAGMENTS << 16) | log2i(fragmentsize);
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for (i = 0, val = 1; val < fragmentsize; val <<= 1, i++);
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fragmentsize = val;
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ioctl_param = (NB_FRAGMENTS << 16) | i;
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if (ioctl(audio_fd, SNDCTL_DSP_SETFRAGMENT, &ioctl_param) == -1)
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{
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*errstr = "SndSys_Init: could not set the fragment size\n";
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return false;
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}
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Con_Printf ("SndSys_Init: using %u fragments of %u bytes\n",
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ioctl_param >> 16, 1 << (ioctl_param & 0xFFFF));
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old_osstime = 0;
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osssoundtime = 0;
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// shm->buffer = Snd_CreateRingBuffer(requested, 0, NULL);
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shm->samples = NB_FRAGMENTS * fragmentsize / (shm->samplebits / 8);
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return false;
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}
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qboolean SNDDMA_InitOSS (void)
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{
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int rc, fmt, tmp, i;
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// char *s;
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// int caps;
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// struct audio_buf_info info;
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char *errstr = NULL;
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snd_inited = false;
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if ((i = COM_CheckParm("-snddev")) && (i + 1 < com_argc))
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{
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Q_strcpy (snd_dev, com_argv[i + 1], sizeof(snd_dev));
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}
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// open snd_dev, confirm capability to mmap, and get size of dma buffer
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audio_fd = open (snd_dev, O_RDWR); // darkplaces uses O_WRONLY
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if (audio_fd < 0)
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{
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perror (snd_dev);
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errstr = va ("Could not open %s\n", snd_dev);
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goto SNDFAIL;
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}
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// disable cooked mode (OSS 4.0+, but not harmful on previous)
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tmp = 0;
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rc = ioctl(audio_fd, SNDCTL_DSP_COOKEDMODE, &tmp);
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rc = ioctl (audio_fd, SNDCTL_DSP_RESET, 0);
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if (rc < 0)
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{
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perror (snd_dev);
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errstr = va ("Could not reset %s\n", snd_dev);
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goto SNDFAIL;
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}
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if (shm->samplebits != 16 && shm->samplebits != 8)
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{
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ioctl (audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
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if (fmt & AFMT_S16_LE)
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shm->samplebits = 16;
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else if (fmt & AFMT_U8)
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shm->samplebits = 8;
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else
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{
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errstr = "Soundcard must support 8- or 16-bit sound!\n";
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goto SNDFAIL;
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}
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}
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fmt = (shm->samplebits == 16 ? AFMT_S16_LE : AFMT_U8);
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rc = ioctl(audio_fd, SNDCTL_DSP_SETFMT, &fmt);
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if (rc < 0)
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{
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perror (snd_dev);
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errstr = va ("Soundcard does not support %d-bit data.\n", shm->samplebits);
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goto SNDFAIL;
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}
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if (shm->speed == 0)
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{
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for (i=0 ; i<sizeof(tryrates)/4 ; i++)
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{
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shm->speed = tryrates[i];
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if (ioctl(audio_fd, SNDCTL_DSP_SPEED, &shm->speed) == -1)
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{
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perror(snd_dev);
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}
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else if (tryrates[i] == shm->speed)
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{
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goto SET_CHANNELS;
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}
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}
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errstr = "Soundcard does not support any known sample rates\n";
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goto SNDFAIL;
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}
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tmp = shm->speed;
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rc = ioctl (audio_fd, SNDCTL_DSP_SPEED, &tmp);
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if (rc < 0)
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{
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perror (snd_dev);
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errstr = va ("Could not set %s speed to %d\n", snd_dev, shm->speed);
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goto SNDFAIL;
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}
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shm->speed = tmp;
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SET_CHANNELS:
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tmp = shm->channels;
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rc = ioctl(audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
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if (rc < 0)
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{
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perror (snd_dev);
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errstr = va ("Soundcard does not support %d channels.\n", shm->channels);
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goto SNDFAIL;
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}
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shm->channels = tmp;
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if (!SNDDMA_InitOSS_Direct (&errstr))
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goto SNDFAIL;
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snd_inited = true;
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return true;
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SNDFAIL:
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if (errstr)
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Con_Printf ("\x02%s", errstr);
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if (audio_fd >= 0)
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close (audio_fd);
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return false;
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}
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qboolean SNDDMA_Init (void)
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{
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int i;
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char *s;
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qboolean result;
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shm = &sn;
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shm->splitbuffer = 0;
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if ((s = getenv("QUAKE_SOUND_SAMPLEBITS")))
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shm->samplebits = Q_atoi(s);
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else if ((i = COM_CheckParm("-sndbits")) && (i + 1 < com_argc))
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shm->samplebits = Q_atoi(com_argv[i+1]);
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else
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shm->samplebits = 0;
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if ((s = getenv("QUAKE_SOUND_SPEED")))
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shm->speed = Q_atoi(s);
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else if ((i = COM_CheckParm("-sndspeed")) && (i + 1 < com_argc))
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shm->speed = Q_atoi(com_argv[i+1]);
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else if (COM_CheckParm("-44khz"))
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shm->speed = 44100;
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else if (COM_CheckParm("-22khz"))
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shm->speed = 22050;
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else
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shm->speed = 0;
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if ((s = getenv("QUAKE_SOUND_CHANNELS")))
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shm->channels = Q_atoi(s);
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else if ((i = COM_CheckParm("-sndmono")))
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shm->channels = 1;
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else if ((i = COM_CheckParm("-sndstereo")))
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shm->channels = 2;
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else
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shm->channels = 2;
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if (snd_useoss)
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result = SNDDMA_InitOSS ();
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if (result)
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{
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shm->submission_chunk = 1;
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shm->samplepos = 0;
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}
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return result;
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}
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int SNDDMA_GetDMAPos (void)
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{
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struct count_info count;
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if (!snd_inited)
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return 0;
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if (snd_useoss)
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{
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if (ioctl(audio_fd, SNDCTL_DSP_GETOPTR, &count) == -1)
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{
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perror (snd_dev);
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Con_Print ("Uh, sound dead.\n");
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close (audio_fd);
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snd_inited = false;
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return 0;
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}
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// shm->samplepos = (count.bytes / (shm->samplebits / 8)) & (shm->samples-1);
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// fprintf(stderr, "%d \r", count.ptr);
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shm->samplepos = count.ptr / (shm->samplebits / 8);
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}
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else
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{
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/****** FIXME ******/
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}
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return shm->samplepos;
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}
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void SNDDMA_Shutdown (void)
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{
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if (snd_useoss)
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{
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if (snd_inited)
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{
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ioctl(audio_fd, SNDCTL_DSP_RESET, NULL); // fixes hang when using aoss
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close (audio_fd);
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audio_fd = 0;
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}
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}
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snd_inited = false;
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}
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byte * SNDDMA_LockBuffer (unsigned *size_out)
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{
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// *size_out = ????
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return shm->buffer;
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}
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void SNDDMA_UnlockBuffer (byte *pbuf, unsigned dwSize)
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{
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}
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/*
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==============
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SNDDMA_Submit
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Send sound to device if buffer isn't really the dma buffer
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===============
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*/
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void SNDDMA_Submit (void)
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{
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}
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