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doesn't work yet (infact, it crashes), but I'm sick of mailing it back and forth

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This commit is contained in:
Bill Currie 2000-10-27 00:08:01 +00:00
parent caf7d73751
commit 2846b27f92
1 changed files with 26 additions and 36 deletions
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62
source/snd_alsa_0_6.c
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@ -1,5 +1,5 @@
/*
snd_alsa.c
snd_alsa_0_6.c
(description)
@ -69,22 +69,17 @@ 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 +221,8 @@ 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 +233,6 @@ 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 +250,9 @@ 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 +267,7 @@ 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);
@ -296,8 +290,7 @@ int SNDDMA_GetDMAPos(void)
{
size_t 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 = snd_pcm_mmap_offset (pcm_handle);
hw_ptr *= shm->channels;
shm->samplepos = hw_ptr;
return shm->samplepos;
@ -321,27 +314,24 @@ Send sound to device if buffer isn't really the dma buffer
*/
void SNDDMA_Submit(void)
{
int count=paintedtime-soundtime;
int rc;
int count = paintedtime - soundtime;
int avail = snd_pcm_avail_update(pcm_handle);
int state;
mmap_control->appl_ptr=mmap_status->hw_ptr+count;
switch (mmap_status->state) {
state = snd_pcm_state (pcm_handle);
printf("%d %d %d\n", state, count, avail);
//count -= delay;
if (count > avail) {
snd_pcm_mmap_forward (pcm_handle, avail);
count -= avail;
}
snd_pcm_mmap_forward (pcm_handle, count);
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);
}
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);
}
printf ("%d\n", snd_pcm_start (pcm_handle));
break;
}
}