460 lines
11 KiB
C
460 lines
11 KiB
C
#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 <sys/soundcard.h>
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#include <stdio.h>
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#include "quakedef.h"
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#ifdef __linux__
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#include <sys/stat.h>
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#endif
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static int tryrates[] = { 11025, 22051, 44100, 8000, 48000 };
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static void OSS_SetUnderWater(soundcardinfo_t *sc, qboolean underwater) //simply a stub. Any ideas how to actually implement this properly?
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{
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}
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static unsigned int OSS_MMap_GetDMAPos(soundcardinfo_t *sc)
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{
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struct count_info count;
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if (sc->audio_fd != -1)
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{
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if (ioctl(sc->audio_fd, SNDCTL_DSP_GETOPTR, &count)==-1)
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{
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perror("/dev/dsp");
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Con_Printf("Uh, sound dead.\n");
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close(sc->audio_fd);
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sc->audio_fd = -1;
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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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sc->sn.samplepos = count.ptr / (sc->sn.samplebits / 8);
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}
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return sc->sn.samplepos;
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}
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static void OSS_MMap_Submit(soundcardinfo_t *sc, int start, int end)
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{
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}
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static unsigned int OSS_Alsa_GetDMAPos(soundcardinfo_t *sc)
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{
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struct audio_buf_info info;
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unsigned int bytes;
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if (ioctl (sc->audio_fd, SNDCTL_DSP_GETOSPACE, &info) != -1)
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{
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bytes = sc->snd_sent + info.bytes;
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sc->sn.samplepos = bytes / (sc->sn.samplebits / 8);
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}
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return sc->sn.samplepos;
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}
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static void OSS_Alsa_Submit(soundcardinfo_t *sc, int start, int end)
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{
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unsigned int bytes, offset, ringsize;
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unsigned chunk;
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int result;
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/*we can't change the data that was already written*/
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bytes = end * sc->sn.numchannels * (sc->sn.samplebits/8);
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bytes -= sc->snd_sent;
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if (!bytes)
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return;
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ringsize = sc->sn.samples * (sc->sn.samplebits/8);
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chunk = bytes;
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offset = sc->snd_sent % ringsize;
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if (offset + chunk >= ringsize)
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chunk = ringsize - offset;
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result = write(sc->audio_fd, sc->sn.buffer + offset, chunk);
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if (result < chunk)
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{
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if (result >= 0)
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sc->snd_sent += result;
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printf("full?\n");
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return;
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}
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sc->snd_sent += chunk;
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chunk = bytes - chunk;
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if (chunk)
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{
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result = write(sc->audio_fd, sc->sn.buffer, chunk);
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if (result > 0)
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sc->snd_sent += result;
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}
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}
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static void OSS_Shutdown(soundcardinfo_t *sc)
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{
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if (sc->sn.buffer) //close it properly, so we can go and restart it later.
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{
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if (sc->Submit == OSS_Alsa_Submit)
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free(sc->sn.buffer); /*if using alsa-compat, just free the buffer*/
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else
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munmap(sc->sn.buffer, sc->sn.samples * (sc->sn.samplebits/8));
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}
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if (sc->audio_fd != -1)
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close(sc->audio_fd);
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*sc->name = '\0';
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}
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static void *OSS_Lock(soundcardinfo_t *sc, unsigned int *sampidx)
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{
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return sc->sn.buffer;
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}
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static void OSS_Unlock(soundcardinfo_t *sc, void *buffer)
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{
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}
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static int OSS_InitCard(soundcardinfo_t *sc, int cardnum)
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{ //FIXME: implement snd_multipledevices somehow.
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int rc;
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int fmt;
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int tmp;
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int i;
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struct audio_buf_info info;
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int caps;
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char *snddev = NULL;
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cvar_t *devname;
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qboolean alsadetected = false;
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#ifdef __linux__
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struct stat sb;
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if (stat("/proc/asound", &sb) != -1)
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alsadetected = true;
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#endif
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devname = Cvar_Get(va("snd_devicename%i", cardnum+1), cardnum?"":"/dev/dsp", 0, "Sound controls");
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snddev = devname->string;
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if (!*snddev)
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return 2;
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sc->inactive_sound = true; //linux sound devices always play sound, even when we're not the active app...
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// open the sound device, confirm capability to mmap, and get size of dma buffer
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Con_Printf("Initing OSS sound device %s\n", snddev);
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#ifdef __linux__
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//linux is a pile of shit.
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//nonblock is needed to get around issues with the old/buggy linux oss3 clone implementation, as well as because this code is too lame to thread audio.
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sc->audio_fd = open(snddev, O_RDWR | O_NONBLOCK); //try the primary device
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//fixme: the following is desired once threading is supported.
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//int flags = fcntl(fd, F_GETFL, 0);
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//fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
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#else
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//FIXME: remove non-block if we're using threads.
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sc->audio_fd = open(snddev, O_WRONLY | O_NONBLOCK); //try the primary device
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#endif
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if (sc->audio_fd < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not open %s\n", snddev);
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OSS_Shutdown(sc);
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return 0;
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}
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Q_strncpyz(sc->name, snddev, sizeof(sc->name));
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//reset it
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rc = ioctl(sc->audio_fd, SNDCTL_DSP_RESET, 0);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not reset %s\n", snddev);
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OSS_Shutdown(sc);
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return 0;
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}
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//check its general capabilities, we need trigger+mmap
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if (ioctl(sc->audio_fd, SNDCTL_DSP_GETCAPS, &caps)==-1)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Sound driver too old\n");
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OSS_Shutdown(sc);
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return 0;
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}
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//choose channels
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#ifdef SNDCTL_DSP_CHANNELS /*I'm paranoid, okay?*/
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tmp = sc->sn.numchannels;
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rc = ioctl(sc->audio_fd, SNDCTL_DSP_CHANNELS, &tmp);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not set %s to channels=%d\n", snddev, sc->sn.numchannels);
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OSS_Shutdown(sc);
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return 0;
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}
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sc->sn.numchannels = tmp;
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#else
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tmp = 0;
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if (sc->sn.numchannels == 2)
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tmp = 1;
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rc = ioctl(sc->audio_fd, SNDCTL_DSP_STEREO, &tmp);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not set %s to stereo=%d\n", snddev, sc->sn.numchannels);
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OSS_Shutdown(sc);
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return 0;
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}
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if (tmp)
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sc->sn.numchannels = 2;
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else
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sc->sn.numchannels = 1;
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#endif
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//choose bits
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// ask the device what it supports
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ioctl(sc->audio_fd, SNDCTL_DSP_GETFMTS, &fmt);
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if (!(fmt & AFMT_S16_LE) && sc->sn.samplebits > 8)
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sc->sn.samplebits = 8; // they asked for 16bit (the default) but their card does not support it
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if (!(fmt & AFMT_U8) && sc->sn.samplebits == 8)
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{ //their card doesn't support 8bit which we're trying to use.
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Con_Printf(CON_ERROR "OSS: No needed sample formats supported\n");
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OSS_Shutdown(sc);
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return 0;
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}
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if (sc->sn.samplebits == 16)
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{
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rc = AFMT_S16_LE;
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rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETFMT, &rc);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not support 16-bit data. Try 8-bit.\n");
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OSS_Shutdown(sc);
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return 0;
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}
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}
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else if (sc->sn.samplebits == 8)
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{
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rc = AFMT_U8;
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rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETFMT, &rc);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not support 8-bit data.\n");
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OSS_Shutdown(sc);
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return 0;
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}
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}
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else
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: %d-bit sound not supported.\n", sc->sn.samplebits);
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OSS_Shutdown(sc);
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return 0;
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}
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//choose speed
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//use the default - menu set value.
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tmp = sc->sn.speed;
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if (ioctl(sc->audio_fd, SNDCTL_DSP_SPEED, &tmp) != 0)
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{ //humph, default didn't work. Go for random preset ones that should work.
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for (i=0 ; i<sizeof(tryrates)/4 ; i++)
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{
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tmp = tryrates[i];
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if (!ioctl(sc->audio_fd, SNDCTL_DSP_SPEED, &tmp)) break;
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}
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if (i == (sizeof(tryrates)/4))
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Failed to obtain a suitable rate\n");
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OSS_Shutdown(sc);
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return 0;
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}
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}
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sc->sn.speed = tmp;
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//figure out buffer size
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if (ioctl(sc->audio_fd, SNDCTL_DSP_GETOSPACE, &info)==-1)
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{
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perror("GETOSPACE");
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Con_Printf(CON_ERROR "OSS: Um, can't do GETOSPACE?\n");
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OSS_Shutdown(sc);
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return 0;
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}
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sc->sn.samples = info.fragstotal * info.fragsize;
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sc->sn.samples /= (sc->sn.samplebits/8);
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/*samples is the number of samples*channels */
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// memory map the dma buffer
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sc->sn.buffer = MAP_FAILED;
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if (alsadetected)
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{
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Con_Printf("Alsa detected. Refusing to mmap.\n");
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}
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else if ((caps & DSP_CAP_TRIGGER) && (caps & DSP_CAP_MMAP))
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{
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sc->sn.buffer = (unsigned char *) mmap(NULL, sc->sn.samples*(sc->sn.samplebits/8), PROT_WRITE, MAP_FILE|MAP_SHARED, sc->audio_fd, 0);
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if (sc->sn.buffer == MAP_FAILED)
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{
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Con_Printf("%s: device reported mmap capability, but mmap failed.\n", snddev);
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if (alsadetected)
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{
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char *f, *n;
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f = (char *)com_argv[0];
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while((n = strchr(f, '/')))
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f = n + 1;
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Con_Printf("Your system is running alsa.\nTry: sudo echo \"%s 0 0 direct\" > /proc/asound/card0/pcm0p/oss\n", f);
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}
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}
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}
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if (sc->sn.buffer == MAP_FAILED)
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{
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sc->sn.buffer = NULL;
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sc->samplequeue = info.bytes / (sc->sn.samplebits/8);
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sc->sn.samples*=2;
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sc->sn.buffer = malloc(sc->sn.samples*(sc->sn.samplebits/8));
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sc->Submit = OSS_Alsa_Submit;
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sc->GetDMAPos = OSS_Alsa_GetDMAPos;
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}
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else
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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(sc->audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not toggle.\n");
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OSS_Shutdown(sc);
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return 0;
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}
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tmp = PCM_ENABLE_OUTPUT;
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rc = ioctl(sc->audio_fd, SNDCTL_DSP_SETTRIGGER, &tmp);
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if (rc < 0)
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{
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perror(snddev);
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Con_Printf(CON_ERROR "OSS: Could not toggle.\n");
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OSS_Shutdown(sc);
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return 0;
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}
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sc->Submit = OSS_MMap_Submit;
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sc->GetDMAPos = OSS_MMap_GetDMAPos;
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}
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sc->sn.samplepos = 0;
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sc->Lock = OSS_Lock;
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sc->Unlock = OSS_Unlock;
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sc->SetWaterDistortion = OSS_SetUnderWater;
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sc->Shutdown = OSS_Shutdown;
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return 1;
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}
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int (*pOSS_InitCard) (soundcardinfo_t *sc, int cardnum) = &OSS_InitCard;
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#ifdef VOICECHAT //this does apparently work after all.
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#include <stdint.h>
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static qboolean QDECL OSS_Capture_Enumerate (void (QDECL *callback) (const char *drivername, const char *devicecode, const char *readablename))
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{
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//open /dev/dsp or /dev/mixer or env("OSS_MIXERDEV") or something
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//SNDCTL_SYSINFO to get sysinfo.numcards
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//for i=0; i<sysinfo.numcards
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//SNDCTL_CARDINFO
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return false;
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}
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void *OSS_Capture_Init(int rate, const char *snddev)
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{
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int tmp;
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intptr_t fd;
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if (!snddev || !*snddev)
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snddev = "/dev/dsp";
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fd = open(snddev, O_RDONLY | O_NONBLOCK); //try the primary device
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if (fd == -1)
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return NULL;
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#ifdef SNDCTL_DSP_CHANNELS
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tmp = 1;
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if (ioctl(fd, SNDCTL_DSP_CHANNELS, &tmp) != 0)
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#else
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tmp = 0;
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if (ioctl(fd, SNDCTL_DSP_STEREO, &tmp) != 0)
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#endif
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{
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Con_Printf("Couldn't set mono\n");
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perror(snddev);
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}
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tmp = AFMT_S16_LE;
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if (ioctl(fd, SNDCTL_DSP_SETFMT, &tmp) != 0)
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{
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Con_Printf("Couldn't set sample bits\n");
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perror(snddev);
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}
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tmp = rate;
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if (ioctl(fd, SNDCTL_DSP_SPEED, &tmp) != 0)
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{
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Con_Printf("Couldn't set capture rate\n");
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perror(snddev);
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}
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fd++;
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return (void*)fd;
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}
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void OSS_Capture_Start(void *ctx)
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{
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/*oss will automagically restart it when we next read*/
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}
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void OSS_Capture_Stop(void *ctx)
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{
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intptr_t fd = ((intptr_t)ctx)-1;
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ioctl(fd, SNDCTL_DSP_RESET, NULL);
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}
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void OSS_Capture_Shutdown(void *ctx)
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{
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intptr_t fd = ((intptr_t)ctx)-1;
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close(fd);
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}
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unsigned int OSS_Capture_Update(void *ctx, unsigned char *buffer, unsigned int minbytes, unsigned int maxbytes)
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{
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intptr_t fd = ((intptr_t)ctx)-1;
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ssize_t res;
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res = read(fd, buffer, maxbytes);
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if (res < 0)
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return 0;
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return res;
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}
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snd_capture_driver_t OSS_Capture =
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{
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1,
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"OSS",
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OSS_Capture_Enumerate,
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OSS_Capture_Init,
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OSS_Capture_Start,
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OSS_Capture_Update,
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OSS_Capture_Stop,
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OSS_Capture_Shutdown
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};
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#endif
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