+/*
+ snd_alsa.c
+
+ (description)
+
+ Copyright (C) 1999,2000 contributors of the QuakeForge project
+ Please see the file "AUTHORS" for a list of contributors
+
+ 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:
+
+ Free Software Foundation, Inc.
+ 59 Temple Place - Suite 330
+ Boston, MA 02111-1307, USA
+
+ $Id$
+*/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "quakedef.h"
+
+#include <sys/soundcard.h>
+#include <linux/soundcard.h>
+#include <sys/asoundlib.h>
+
+#ifndef MAP_FAILED
+# define MAP_FAILED ((void*)-1)
+#endif
+
+extern int soundtime;
+
+static int snd_inited;
+
+static snd_pcm_t *pcm_handle;
+static struct snd_pcm_channel_info cinfo;
+static struct snd_pcm_channel_params params;
+static struct snd_pcm_channel_setup setup;
+static snd_pcm_mmap_control_t *mmap_control = NULL;
+static char *mmap_data = NULL;
+static int card=-1,dev=-1;
+
+int check_card(int card)
+{
+ snd_ctl_t *handle;
+ snd_ctl_hw_info_t info;
+ int rc;
+
+ if ((rc = snd_ctl_open(&handle, card)) < 0) {
+ Con_Printf("Error: control open (%i): %s\n", card, snd_strerror(rc));
+ return rc;
+ }
+ if ((rc = snd_ctl_hw_info(handle, &info)) < 0) {
+ Con_Printf("Error: control hardware info (%i): %s\n", card,
+ snd_strerror(rc));
+ snd_ctl_close(handle);
+ return rc;
+ }
+ snd_ctl_close(handle);
+ if (dev==-1) {
+ for (dev = 0; dev < info.pcmdevs; dev++) {
+ if ((rc=snd_pcm_open(&pcm_handle,card,dev,
+ SND_PCM_OPEN_PLAYBACK
+ | SND_PCM_OPEN_NONBLOCK))==0) {
+ return 0;
+ }
+ }
+ } else {
+ if (dev>=0 && dev <info.pcmdevs) {
+ if ((rc=snd_pcm_open(&pcm_handle,card,dev,
+ SND_PCM_OPEN_PLAYBACK
+ | SND_PCM_OPEN_NONBLOCK))==0) {
+ return 0;
+ }
+ }
+ }
+ return 1;
+}
+
+qboolean SNDDMA_Init(void)
+{
+ int rc=0,i;
+ char *err_msg="";
+ int rate,format,bps,stereo,frag_size;
+ unsigned int mask;
+
+ mask = snd_cards_mask();
+ if (!mask) {
+ Con_Printf("No sound cards detected\n");
+ return 0;
+ }
+ if ((i=COM_CheckParm("-sndcard"))!=0) {
+ card=atoi(com_argv[i+1]);
+ }
+ if ((i=COM_CheckParm("-snddev"))!=0) {
+ dev=atoi(com_argv[i+1]);
+ }
+ if (card==-1) {
+ for (card=0; card<SND_CARDS; card++) {
+ if (!(mask & (1<<card)))
+ continue;
+ rc=check_card(card);
+ if (rc<0)
+ return 0;
+ if (!rc)
+ goto dev_openned;
+ }
+ } else {
+ if (dev==-1) {
+ rc=check_card(card);
+ if (rc<0)
+ return 0;
+ if (!rc)
+ goto dev_openned;
+ } else {
+ if ((rc=snd_pcm_open(&pcm_handle,card,dev,
+ SND_PCM_OPEN_PLAYBACK
+ | SND_PCM_OPEN_NONBLOCK))<0) {
+ Con_Printf("Error: audio open error: %s\n", snd_strerror(rc));
+ return 0;
+ }
+ goto dev_openned;
+ }
+ }
+ Con_Printf("Error: audio open error: %s\n", snd_strerror(rc));
+ return 0;
+
+ dev_openned:
+ Con_Printf("Using card %d, device %d.\n", card, dev);
+ memset(&cinfo, 0, sizeof(cinfo));
+ cinfo.channel = SND_PCM_CHANNEL_PLAYBACK;
+ snd_pcm_channel_info(pcm_handle, &cinfo);
+ Con_Printf("%08x %08x %08x\n",cinfo.flags,cinfo.formats,cinfo.rates);
+ if (cinfo.rates & SND_PCM_RATE_44100) {
+ rate=44100;
+ frag_size=512; /* assuming stereo 8 bit */
+ } else if (cinfo.rates & SND_PCM_RATE_22050) {
+ rate=22050;
+ frag_size=256; /* assuming stereo 8 bit */
+ } else if (cinfo.rates & SND_PCM_RATE_11025) {
+ rate=11025;
+ frag_size=128; /* assuming stereo 8 bit */
+ } else {
+ Con_Printf("ALSA: desired rates not supported\n");
+ goto error_2;
+ }
+ if (cinfo.formats & SND_PCM_FMT_S16_LE) {
+ format=SND_PCM_SFMT_S16_LE;
+ bps=16;
+ frag_size*=2;
+ } else if (cinfo.formats & SND_PCM_FMT_U8) {
+ format=SND_PCM_SFMT_U8;
+ bps=8;
+ } else {
+ Con_Printf("ALSA: desired formats not supported\n");
+ goto error_2;
+ }
+ if (cinfo.max_voices>=2) {
+ stereo=1;
+ } else {
+ stereo=0;
+ frag_size/=2;
+ }
+
+// err_msg="audio flush";
+// if ((rc=snd_pcm_channel_flush(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0)
+// goto error;
+ err_msg="audio munmap";
+ if ((rc=snd_pcm_munmap(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0)
+ goto error;
+
+ memset(¶ms, 0, sizeof(params));
+ params.channel = SND_PCM_CHANNEL_PLAYBACK;
+ params.mode = SND_PCM_MODE_BLOCK;
+ params.format.interleave=1;
+ params.format.format=format;
+ params.format.rate=rate;
+ params.format.voices=stereo+1;
+ params.start_mode = SND_PCM_START_GO;
+ params.stop_mode = SND_PCM_STOP_ROLLOVER;
+ params.buf.block.frag_size=frag_size;
+ params.buf.block.frags_min=1;
+ params.buf.block.frags_max=-1;
+// err_msg="audio flush";
+// if ((rc=snd_pcm_channel_flush(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0)
+// goto error;
+ err_msg="audio params";
+ if ((rc=snd_pcm_channel_params(pcm_handle, ¶ms))<0)
+ goto error;
+
+ err_msg="audio mmap";
+ if ((rc=snd_pcm_mmap(pcm_handle, SND_PCM_CHANNEL_PLAYBACK, &mmap_control, (void **)&mmap_data))<0)
+ goto error;
+ err_msg="audio prepare";
+ if ((rc=snd_pcm_plugin_prepare(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0)
+ goto error;
+
+ memset(&setup, 0, sizeof(setup));
+ setup.mode = SND_PCM_MODE_BLOCK;
+ setup.channel = SND_PCM_CHANNEL_PLAYBACK;
+ err_msg="audio setup";
+ if ((rc=snd_pcm_channel_setup(pcm_handle, &setup))<0)
+ goto error;
+
+ shm=&sn;
+ memset((dma_t*)shm,0,sizeof(*shm));
+ shm->splitbuffer = 0;
+ shm->channels=setup.format.voices;
+ shm->submission_chunk=128; // don't mix less than this #
+ shm->samplepos=0; // in mono samples
+ shm->samplebits=setup.format.format==SND_PCM_SFMT_S16_LE?16:8;
+ shm->samples=setup.buf.block.frags*setup.buf.block.frag_size/(shm->samplebits/8); // mono samples in buffer
+ shm->speed=setup.format.rate;
+ shm->buffer=(unsigned char*)mmap_data;
+ Con_Printf("%5d stereo\n", shm->channels - 1);
+ Con_Printf("%5d samples\n", shm->samples);
+ Con_Printf("%5d samplepos\n", shm->samplepos);
+ Con_Printf("%5d samplebits\n", shm->samplebits);
+ Con_Printf("%5d submission_chunk\n", shm->submission_chunk);
+ Con_Printf("%5d speed\n", shm->speed);
+ Con_Printf("0x%x dma buffer\n", (int)shm->buffer);
+ Con_Printf("%5d total_channels\n", total_channels);
+
+ snd_inited=1;
+ return 1;
+ error:
+ Con_Printf("Error: %s: %s\n", err_msg, snd_strerror(rc));
+ error_2:
+ snd_pcm_close(pcm_handle);
+ return 0;
+}
+
+int SNDDMA_GetDMAPos(void)
+{
+ if (!snd_inited) return 0;
+ shm->samplepos=(mmap_control->status.frag_io+1)*setup.buf.block.frag_size/(shm->samplebits/8);
+ return shm->samplepos;
+}
+
+void SNDDMA_Shutdown(void)
+{
+ if (snd_inited)
+ {
+ snd_pcm_close(pcm_handle);
+ snd_inited = 0;
+ }
+}
+
+/*
+==============
+SNDDMA_Submit
+
+Send sound to device if buffer isn't really the dma buffer
+===============
+*/
+void SNDDMA_Submit(void)
+{
+ int count=paintedtime-soundtime;
+ int i,s,e;
+ int rc;
+
+ count+=setup.buf.block.frag_size-1;
+ count/=setup.buf.block.frag_size;
+ s=soundtime/setup.buf.block.frag_size;
+ e=s+count;
+ for (i=s; i<e; i++)
+ mmap_control->fragments[i % setup.buf.block.frags].data=1;
+ switch (mmap_control->status.status) {
+ case SND_PCM_STATUS_PREPARED:
+ if ((rc=snd_pcm_channel_go(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0) {
+ fprintf(stderr, "unable to start playback. %s\n",
+ snd_strerror(rc));
+ exit(1);
+ }
+ break;
+ case SND_PCM_STATUS_RUNNING:
+ break;
+ case SND_PCM_STATUS_UNDERRUN:
+ if ((rc=snd_pcm_plugin_prepare(pcm_handle, SND_PCM_CHANNEL_PLAYBACK))<0) {
+ fprintf(stderr, "underrun: playback channel prepare error. %s\n",
+ snd_strerror(rc));
+ exit(1);
+ }
+ break;
+ default:
+ break;
+ }
+}
+
projects / xonotic / darkplaces.git / commitdiff