/*
snd_alsa.c
- (description)
+ Support for the ALSA 1.0.1 sound driver
Copyright (C) 1999,2000 contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
- $Id$
*/
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
+#include <alsa/asoundlib.h>
#include "quakedef.h"
+#include "snd_main.h"
-#include <sys/soundcard.h>
-#include <linux/soundcard.h>
-#include <sys/asoundlib.h>
+static snd_pcm_uframes_t buffer_size;
-#ifndef MAP_FAILED
-# define MAP_FAILED ((void*)-1)
-#endif
+static const char *pcmname = NULL;
+static snd_pcm_t *pcm;
-extern int soundtime;
+qboolean SNDDMA_Init (void)
+{
+ int err, i, j;
+ int width;
+ int channels;
+ unsigned int rate;
+ snd_pcm_hw_params_t *hw;
+ snd_pcm_sw_params_t *sw;
+ snd_pcm_uframes_t frag_size;
+
+ snd_pcm_hw_params_alloca (&hw);
+ snd_pcm_sw_params_alloca (&sw);
+
+// COMMANDLINEOPTION: Linux ALSA Sound: -sndbits <number> sets sound precision to 8 or 16 bit (email me if you want others added)
+ width = 2;
+ if ((i=COM_CheckParm("-sndbits")) != 0)
+ {
+ j = atoi(com_argv[i+1]);
+ if (j == 16 || j == 8)
+ width = j / 8;
+ else
+ Con_Printf("Error: invalid sample bits: %d\n", j);
+ }
-static int snd_inited;
+// COMMANDLINEOPTION: Linux ALSA Sound: -sndspeed <hz> chooses 44100 hz, 22100 hz, or 11025 hz sound output rate
+ rate = 44100;
+ if ((i=COM_CheckParm("-sndspeed")) != 0)
+ {
+ j = atoi(com_argv[i+1]);
+ if (j >= 1)
+ rate = j;
+ else
+ Con_Printf("Error: invalid sample rate: %d\n", rate);
+ }
-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;
+ for (channels = 8;channels >= 1;channels--)
+ {
+ if ((channels & 1) && channels != 1)
+ continue;
+// COMMANDLINEOPTION: Linux ALSA Sound: -sndmono sets sound output to mono
+ if ((i=COM_CheckParm("-sndmono")) != 0)
+ if (channels != 1)
+ continue;
+// COMMANDLINEOPTION: Linux ALSA Sound: -sndstereo sets sound output to stereo
+ if ((i=COM_CheckParm("-sndstereo")) != 0)
+ if (channels != 2)
+ continue;
-int check_card(int card)
-{
- snd_ctl_t *handle;
- snd_ctl_hw_info_t info;
- int rc;
+// COMMANDLINEOPTION: Linux ALSA Sound: -sndpcm <devicename> selects which pcm device to us, default is "default"
+ if (channels == 8)
+ pcmname = "surround71";
+ else if (channels == 6)
+ pcmname = "surround51";
+ else if (channels == 4)
+ pcmname = "surround40";
+ else
+ pcmname = "default";
+ if ((i=COM_CheckParm("-sndpcm"))!=0)
+ pcmname = com_argv[i+1];
+
+ Con_Printf ("ALSA: Trying PCM %s.\n", pcmname);
+
+ err = snd_pcm_open (&pcm, pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
+ if (0 > err)
+ {
+ Con_Printf ("Error: audio open error: %s\n", snd_strerror (err));
+ continue;
+ }
- 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;
- }
+ err = snd_pcm_hw_params_any (pcm, hw);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: error setting hw_params_any. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
}
- } 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;
- }
+
+ err = snd_pcm_hw_params_set_access (pcm, hw, SND_PCM_ACCESS_MMAP_INTERLEAVED);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: Failure to set interleaved mmap PCM access. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
}
- }
- 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;
+ err = snd_pcm_hw_params_set_format (pcm, hw, width == 1 ? SND_PCM_FORMAT_U8 : SND_PCM_FORMAT_S16);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: desired bits %i not supported by driver. %s\n", width * 8, snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
}
- } 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;
+
+ err = snd_pcm_hw_params_set_channels (pcm, hw, channels);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: no usable channels. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
}
- }
- 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;
+ err = snd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: desired rate %i not supported by driver. %s\n", rate, snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+
+ frag_size = 64 * width * rate / 11025;
+ err = snd_pcm_hw_params_set_period_size_near (pcm, hw, &frag_size, 0);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to set period size near %i. %s\n", (int) frag_size, snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+ err = snd_pcm_hw_params (pcm, hw);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to install hw params: %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+ err = snd_pcm_sw_params_current (pcm, sw);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to determine current sw params. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+ err = snd_pcm_sw_params_set_start_threshold (pcm, sw, ~0U);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to set playback threshold. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+ err = snd_pcm_sw_params_set_stop_threshold (pcm, sw, ~0U);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to set playback stop threshold. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+ err = snd_pcm_sw_params (pcm, sw);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to install sw params. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+
+ err = snd_pcm_hw_params_get_buffer_size (hw, &buffer_size);
+ if (0 > err)
+ {
+ Con_Printf ("ALSA: unable to get buffer size. %s\n", snd_strerror (err));
+ snd_pcm_close (pcm);
+ continue;
+ }
+
+ memset( (void*) shm, 0, sizeof(*shm) );
+ shm->format.channels = channels;
+ shm->format.width = width;
+ shm->format.speed = rate;
+ shm->samplepos = 0;
+ shm->sampleframes = buffer_size;
+ shm->samples = shm->sampleframes * shm->format.channels;
+ SNDDMA_GetDMAPos (); // sets shm->buffer
+
+ return true;
+ }
+ return false;
}
-int SNDDMA_GetDMAPos(void)
+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);
+ const snd_pcm_channel_area_t *areas;
+ snd_pcm_uframes_t offset;
+ snd_pcm_uframes_t nframes = shm->sampleframes;
+
+ if (!shm)
+ return 0;
+
+ snd_pcm_avail_update (pcm);
+ snd_pcm_mmap_begin (pcm, &areas, &offset, &nframes);
+ offset *= shm->format.channels;
+ nframes *= shm->format.channels;
+ shm->samplepos = offset;
+ shm->buffer = (unsigned char *)areas->addr;
return shm->samplepos;
}
-void SNDDMA_Shutdown(void)
+void SNDDMA_Shutdown (void)
{
- if (snd_inited)
- {
- snd_pcm_close(pcm_handle);
- snd_inited = 0;
- }
+ snd_pcm_close (pcm);
}
/*
-==============
-SNDDMA_Submit
+ SNDDMA_Submit
-Send sound to device if buffer isn't really the dma buffer
-===============
+ Send sound to device if buffer isn't really the dma buffer
*/
-void SNDDMA_Submit(void)
+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;
+ int state;
+ int count = paintedtime - soundtime;
+ const snd_pcm_channel_area_t *areas;
+ snd_pcm_uframes_t nframes;
+ snd_pcm_uframes_t offset;
+
+ nframes = count / shm->format.channels;
+
+ snd_pcm_avail_update (pcm);
+ snd_pcm_mmap_begin (pcm, &areas, &offset, &nframes);
+
+ state = snd_pcm_state (pcm);
+
+ switch (state) {
+ case SND_PCM_STATE_PREPARED:
+ snd_pcm_mmap_commit (pcm, offset, nframes);
+ snd_pcm_start (pcm);
+ break;
+ case SND_PCM_STATE_RUNNING:
+ snd_pcm_mmap_commit (pcm, offset, nframes);
+ break;
+ default:
+ break;
}
}
+void *S_LockBuffer(void)
+{
+ return shm->buffer;
+}
+
+void S_UnlockBuffer(void)
+{
+}
projects / xonotic / darkplaces.git / blobdiff