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bring over from newtree

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This commit is contained in:
Bill Currie 2000-10-27 19:06:15 +00:00
parent 5553c1ab5a
commit 8d1b5efd1d
1 changed files with 63 additions and 62 deletions
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123
source/snd_alsa_0_6.c
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@ -1,5 +1,5 @@
/*
snd_alsa.c
snd_alsa_0_6.c
(description)
@ -28,40 +28,17 @@
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
# include "config.h"
#endif
#include <qtypes.h>
#include <sound.h>
#include <qargs.h>
#include <console.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <fcntl.h>
#include <sys/types.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#if defined HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
#elif defined HAVE_LINUX_SOUNDCARD_H
# include <linux/soundcard.h>
#elif HAVE_MACHINE_SOUNDCARD_H
# include <machine/soundcard.h>
#endif
#include <sys/asoundlib.h>
#ifndef MAP_FAILED
# define MAP_FAILED ((void*)-1)
#endif
#include "qtypes.h"
#include "sound.h"
#include "qargs.h"
#include "console.h"
static int snd_inited;
@ -69,22 +46,17 @@ 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_mmap_control_t *mmap_control = NULL;
static snd_pcm_mmap_status_t *mmap_status = NULL;
static char *mmap_data = NULL;
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;;
//XXX ugh, not defined in asoundlib.h
int snd_pcm_mmap_status(snd_pcm_t *pcm, snd_pcm_mmap_status_t **status);
int snd_pcm_mmap_control(snd_pcm_t *pcm, snd_pcm_mmap_control_t **control);
int check_card(int card)
{
snd_ctl_t *handle;
snd_ctl_hw_info_t info;
int rc;
if ((rc = snd_ctl_hw_open(&handle, card)) < 0) {
if ((rc = snd_ctl_hw_open(&handle, 0, card)) < 0) {
Con_Printf("Error: control open (%i): %s\n", card, snd_strerror(rc));
return rc;
}
@ -226,6 +198,8 @@ qboolean SNDDMA_Init(void)
//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;
@ -236,7 +210,6 @@ qboolean SNDDMA_Init(void)
params.frag_size=frag_size;
params.avail_min = frag_size;
params.xrun_max = 1024;
params.boundary = params.buffer_size;
while (1) {
@ -254,11 +227,9 @@ qboolean SNDDMA_Init(void)
}
err_msg="audio mmap";
if ((rc=snd_pcm_mmap(pcm_handle, (void**)&mmap_data))<0)
if ((rc=snd_pcm_mmap(pcm_handle))<0)
goto error;
if ((rc=snd_pcm_mmap_status(pcm_handle, &mmap_status))<0)
goto error;
if ((rc=snd_pcm_mmap_control(pcm_handle, &mmap_control))<0)
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)
@ -273,7 +244,7 @@ qboolean SNDDMA_Init(void)
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_data;
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);
@ -292,12 +263,28 @@ qboolean SNDDMA_Init(void)
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)
{
size_t hw_ptr;
int hw_ptr;
if (!snd_inited) return 0;
hw_ptr = mmap_status->hw_ptr;
//printf("%7d %7d\n", mmap_control->appl_ptr, hw_ptr);
hw_ptr = get_hw_ptr();
hw_ptr *= shm->channels;
shm->samplepos = hw_ptr;
return shm->samplepos;
@ -322,26 +309,40 @@ Send sound to device if buffer isn't really the dma buffer
void SNDDMA_Submit(void)
{
int count = paintedtime - soundtime;
int rc;
int avail;
int missed;
int state;
int hw_ptr;
int offset;
mmap_control->appl_ptr=mmap_status->hw_ptr+count;
switch (mmap_status->state) {
state = snd_pcm_state (pcm_handle);
switch (state) {
case SND_PCM_STATE_PREPARED:
if ((rc=snd_pcm_start(pcm_handle))<0) {
fprintf(stderr, "unable to start playback. %s\n",
snd_strerror(rc));
exit(1);
}
snd_pcm_mmap_forward (pcm_handle, count);
snd_pcm_start (pcm_handle);
break;
case SND_PCM_STATE_RUNNING:
break;
case SND_PCM_STATE_UNDERRUN:
printf("sound underrun\n");
if ((rc=snd_pcm_prepare (pcm_handle))<0) {
fprintf(stderr, "underrun: playback channel prepare error. %s\n",
snd_strerror(rc));
exit(1);
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;
}
}