+++ /dev/null
-/*
- snd_alsa_0_6.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 <stdio.h>
-
-#include <sys/asoundlib.h>
-
-#include "qtypes.h"
-#include "sound.h"
-#include "qargs.h"
-#include "console.h"
-
-static int snd_inited;
-
-static snd_pcm_t *pcm_handle;
-static snd_pcm_params_info_t cpinfo;
-static snd_pcm_params_t params;
-static snd_pcm_setup_t setup;
-static snd_pcm_channel_area_t mmap_stopped_areas[2];
-static snd_pcm_channel_area_t mmap_running_areas[2];
-static int card=-1,dev=-1,subdev=-1;;
-
-int check_card(int card)
-{
- snd_ctl_t *handle;
- snd_ctl_hw_info_t info;
- int rc;
-
- if ((rc = snd_ctl_hw_open(&handle, 0, 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_hw_open_subdevice(&pcm_handle,card,dev,subdev,
- SND_PCM_STREAM_PLAYBACK,
- SND_PCM_NONBLOCK))==0) {
- return 0;
- }
- }
- } else {
- if (dev>=0 && dev <info.pcmdevs) {
- if ((rc=snd_pcm_hw_open_subdevice(&pcm_handle,card,dev,subdev,
- SND_PCM_STREAM_PLAYBACK,
- SND_PCM_NONBLOCK))==0) {
- return 0;
- }
- }
- }
- return 1;
-}
-
-qboolean SNDDMA_Init(void)
-{
- int rc=0,i;
- char *err_msg="";
- int rate=-1,format=-1,bps,stereo=-1,frag_size,frame_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 ((i=COM_CheckParm("-sndbits")) != 0) {
- i = atoi(com_argv[i+1]);
- if (i==16) {
- format = SND_PCM_SFMT_S16_LE;
- } else if (i==8) {
- format = SND_PCM_SFMT_U8;
- } else {
- Con_Printf("Error: invalid sample bits: %d\n", i);
- return 0;
- }
- }
- if ((i=COM_CheckParm("-sndspeed")) != 0) {
- rate = atoi(com_argv[i+1]);
- if (rate!=44100 && rate!=22050 && rate!=11025) {
- Con_Printf("Error: invalid sample rate: %d\n", rate);
- return 0;
- }
- }
- if ((i=COM_CheckParm("-sndmono")) != 0) {
- stereo=0;
- }
- 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_hw_open_subdevice(&pcm_handle,card,dev,subdev,
- SND_PCM_STREAM_PLAYBACK,
- SND_PCM_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(&cpinfo, 0, sizeof(cpinfo));
- snd_pcm_params_info(pcm_handle, &cpinfo);
- Con_Printf("%08x %08x %08x\n",cpinfo.flags,cpinfo.formats,cpinfo.rates);
- if ((rate==-1 || rate==44100) && cpinfo.rates & SND_PCM_RATE_44100) {
- rate=44100;
- frag_size=256; /* assuming stereo 8 bit */
- } else if ((rate==-1 || rate==22050) && cpinfo.rates & SND_PCM_RATE_22050) {
- rate=22050;
- frag_size=128; /* assuming stereo 8 bit */
- } else if ((rate==-1 || rate==11025) && cpinfo.rates & SND_PCM_RATE_11025) {
- rate=11025;
- frag_size=64; /* assuming stereo 8 bit */
- } else {
- Con_Printf("ALSA: desired rates not supported\n");
- goto error_2;
- }
- if ((format==-1 || format==SND_PCM_SFMT_S16_LE) && cpinfo.formats & SND_PCM_FMT_S16_LE) {
- format=SND_PCM_SFMT_S16_LE;
- bps=16;
- frame_size=2;
- } else if ((format==-1 || format==SND_PCM_SFMT_U8) && cpinfo.formats & SND_PCM_FMT_U8) {
- format=SND_PCM_SFMT_U8;
- bps=8;
- frame_size=1;
- } else {
- Con_Printf("ALSA: desired formats not supported\n");
- goto error_2;
- }
- //XXX can't support non-interleaved stereo
- if (stereo && (cpinfo.flags & SND_PCM_INFO_INTERLEAVED) && cpinfo.max_channels>=2) {
- stereo=1;
- frame_size*=2;
- } else {
- stereo=0;
- }
-
- memset(¶ms, 0, sizeof(params));
- //XXX can't support non-interleaved stereo
- params.xfer_mode = stereo ? SND_PCM_XFER_INTERLEAVED
- : SND_PCM_XFER_NONINTERLEAVED;
- params.mmap_shape = stereo ? SND_PCM_XFER_INTERLEAVED
- : SND_PCM_XFER_NONINTERLEAVED;
- params.format.sfmt=format;
- params.format.rate=rate;
- params.format.channels=stereo+1;
- params.start_mode = SND_PCM_START_EXPLICIT;
- params.xrun_mode = SND_PCM_XRUN_NONE;
-
- params.buffer_size = (2<<16) / frame_size;
- params.frag_size=frag_size;
- params.avail_min = frag_size;
-
- params.boundary = params.buffer_size;
-
- while (1) {
- err_msg="audio params";
- if ((rc=snd_pcm_params(pcm_handle, ¶ms))<0)
- goto error;
-
- memset(&setup, 0, sizeof(setup));
- err_msg="audio setup";
- if ((rc=snd_pcm_setup(pcm_handle, &setup))<0)
- goto error;
- if (setup.buffer_size == params.buffer_size)
- break;
- params.boundary = params.buffer_size = setup.buffer_size;
- }
-
- err_msg="audio mmap";
- if ((rc=snd_pcm_mmap(pcm_handle))<0)
- goto error;
- if ((rc=snd_pcm_mmap_get_areas(pcm_handle, mmap_stopped_areas, mmap_running_areas)))
- goto error;
- err_msg="audio prepare";
- if ((rc=snd_pcm_prepare(pcm_handle))<0)
- goto error;
-
- shm=&sn;
- memset((dma_t*)shm,0,sizeof(*shm));
- shm->splitbuffer = 0;
- shm->channels=setup.format.channels;
- shm->submission_chunk=frag_size; // don't mix less than this #
- shm->samplepos=0; // in mono samples
- shm->samplebits=setup.format.sfmt==SND_PCM_SFMT_S16_LE?16:8;
- shm->samples=setup.buffer_size*shm->channels; // mono samples in buffer
- shm->speed=setup.format.rate;
- shm->buffer=(unsigned char*)mmap_running_areas->addr;
- 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;
-}
-
-static inline int
-get_hw_ptr()
-{
- size_t app_ptr;
- ssize_t delay;
- int hw_ptr;
-
- if (snd_pcm_state (pcm_handle) != SND_PCM_STATE_RUNNING)
- return 0;
- app_ptr = snd_pcm_mmap_offset (pcm_handle);
- snd_pcm_delay (pcm_handle, &delay);
- hw_ptr = app_ptr - delay;
- return hw_ptr;
-}
-
-int SNDDMA_GetDMAPos(void)
-{
- int hw_ptr;
-
- if (!snd_inited) return 0;
-
- hw_ptr = get_hw_ptr();
- hw_ptr *= shm->channels;
- shm->samplepos = hw_ptr;
- 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 avail;
- int missed;
- int state;
- int hw_ptr;
- int offset;
-
- state = snd_pcm_state (pcm_handle);
-
- switch (state) {
- case SND_PCM_STATE_PREPARED:
- snd_pcm_mmap_forward (pcm_handle, count);
- snd_pcm_start (pcm_handle);
- break;
- case SND_PCM_STATE_RUNNING:
- hw_ptr = get_hw_ptr();
- missed = hw_ptr - shm->samplepos / shm->channels;
- count -= missed;
- offset = snd_pcm_mmap_offset (pcm_handle);
- if (offset > hw_ptr)
- count -= (offset - hw_ptr);
- else
- count -= (setup.buffer_size - hw_ptr + offset);
- if (count < 0) {
- snd_pcm_rewind (pcm_handle, -count);
- } else if (count > 0) {
- avail = snd_pcm_avail_update(pcm_handle);
- if (avail > 0 && count > avail) {
- snd_pcm_mmap_forward (pcm_handle, avail);
- count -= avail;
- }
- snd_pcm_mmap_forward (pcm_handle, count);
- }
- break;
- default:
- break;
- }
-}
-
projects / xonotic / darkplaces.git / commitdiff