static ALCboolean alsa_open_playback(ALCdevice *device, const ALCchar *deviceName)
{
alsa_data *data;
char driver[64];
int i;
if(!alsa_load())
return ALC_FALSE;
strncpy(driver, GetConfigValue("alsa", "device", "default"), sizeof(driver)-1);
driver[sizeof(driver)-1] = 0;
if(!deviceName)
deviceName = alsaDevice;
else if(strcmp(deviceName, alsaDevice) != 0)
{
size_t idx;
if(!allDevNameMap)
allDevNameMap = probe_devices(SND_PCM_STREAM_PLAYBACK, &numDevNames);
for(idx = 0;idx < numDevNames;idx++)
{
if(allDevNameMap[idx].name &&
strcmp(deviceName, allDevNameMap[idx].name) == 0)
{
if(idx > 0)
sprintf(driver, "hw:%d,%d", allDevNameMap[idx].card, allDevNameMap[idx].dev);
break;
}
}
if(idx == numDevNames)
return ALC_FALSE;
}
data = (alsa_data*)calloc(1, sizeof(alsa_data));
i = psnd_pcm_open(&data->pcmHandle, driver, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if(i < 0)
{
Sleep(200);
i = psnd_pcm_open(&data->pcmHandle, driver, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
}
if(i >= 0)
{
i = psnd_pcm_nonblock(data->pcmHandle, 0);
if(i < 0)
psnd_pcm_close(data->pcmHandle);
}
if(i < 0)
{
free(data);
AL_PRINT("Could not open playback device '%s': %s\n", driver, psnd_strerror(i));
return ALC_FALSE;
}
device->szDeviceName = strdup(deviceName);
device->ExtraData = data;
return ALC_TRUE;
}
static ALuint ALSANoMMapProc(ALvoid *ptr)
{
ALCdevice *pDevice = (ALCdevice*)ptr;
alsa_data *data = (alsa_data*)pDevice->ExtraData;
snd_pcm_sframes_t avail;
char *WritePtr;
SetRTPriority();
while(!data->killNow)
{
int state = verify_state(data->pcmHandle);
if(state < 0)
{
AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state));
aluHandleDisconnect(pDevice);
break;
}
WritePtr = data->buffer;
avail = data->size / psnd_pcm_frames_to_bytes(data->pcmHandle, 1);
aluMixData(pDevice, WritePtr, avail);
while(avail > 0)
{
int ret = psnd_pcm_writei(data->pcmHandle, WritePtr, avail);
switch (ret)
{
case -EAGAIN:
continue;
case -ESTRPIPE:
case -EPIPE:
case -EINTR:
ret = psnd_pcm_recover(data->pcmHandle, ret, 1);
if(ret >= 0)
psnd_pcm_prepare(data->pcmHandle);
break;
default:
if (ret >= 0)
{
WritePtr += psnd_pcm_frames_to_bytes(data->pcmHandle, ret);
avail -= ret;
}
break;
}
if (ret < 0)
{
ret = psnd_pcm_prepare(data->pcmHandle);
if(ret < 0)
break;
}
}
}
return 0;
}
static ALuint ALSANoMMapCaptureProc(ALvoid *ptr)
{
ALCdevice *pDevice = (ALCdevice*)ptr;
alsa_data *data = (alsa_data*)pDevice->ExtraData;
snd_pcm_sframes_t avail;
while(!data->killNow)
{
int state = verify_state(data->pcmHandle);
if(state < 0)
{
AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state));
aluHandleDisconnect(pDevice);
break;
}
avail = (snd_pcm_uframes_t)data->size / psnd_pcm_frames_to_bytes(data->pcmHandle, 1);
avail = psnd_pcm_readi(data->pcmHandle, data->buffer, avail);
switch(avail)
{
case -EAGAIN:
continue;
case -ESTRPIPE:
while((avail=psnd_pcm_resume(data->pcmHandle)) == -EAGAIN)
Sleep(1);
break;
case -EPIPE:
break;
default:
if (avail >= 0 && data->doCapture)
WriteRingBuffer(data->ring, data->buffer, avail);
break;
}
if(avail < 0)
{
avail = psnd_pcm_prepare(data->pcmHandle);
if(avail < 0)
AL_PRINT("prepare error: %s\n", psnd_strerror(avail));
}
}
return 0;
}
static int xrun_recovery(snd_pcm_t *handle, int err)
{
if (err == -EPIPE)
{ /* under-run */
err = psnd_pcm_prepare(handle);
if (err < 0)
AL_PRINT("prepare failed: %s\n", psnd_strerror(err));
}
else if (err == -ESTRPIPE)
{
while ((err = psnd_pcm_resume(handle)) == -EAGAIN)
Sleep(1); /* wait until the suspend flag is released */
if (err < 0)
{
err = psnd_pcm_prepare(handle);
if (err < 0)
AL_PRINT("prepare failed: %s\n", psnd_strerror(err));
}
}
return err;
}
static int xrun_recovery(snd_pcm_t *handle, int err)
{
if(err == -EINTR || err == -EPIPE || err == -ESTRPIPE)
{
err = psnd_pcm_recover(handle, err, 1);
if(err >= 0)
err = psnd_pcm_prepare(handle);
if(err < 0)
AL_PRINT("recover failed: %s\n", psnd_strerror(err));
}
return err;
}
static void alsa_start_capture(ALCdevice *Device)
{
alsa_data *data = (alsa_data*)Device->ExtraData;
int err;
err = psnd_pcm_start(data->pcmHandle);
if(err < 0)
{
AL_PRINT("start failed: %s\n", psnd_strerror(err));
aluHandleDisconnect(Device);
}
else
data->doCapture = AL_TRUE;
}
void alc_alsa_probe(int type)
{
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
snd_pcm_stream_t stream;
char name[128];
ALuint i;
if(!alsa_handle) alc_alsa_init(NULL);
if(!alsa_handle) return;
psnd_ctl_card_info_malloc(&info);
psnd_pcm_info_malloc(&pcminfo);
if(type == DEVICE_PROBE)
AppendDeviceList(alsaDevice);
else if(type == ALL_DEVICE_PROBE)
{
stream = SND_PCM_STREAM_PLAYBACK;
card = -1;
if(psnd_card_next(&card) < 0 || card < 0) {
AL_PRINT("no playback cards found...\n");
psnd_pcm_info_free(pcminfo);
psnd_ctl_card_info_free(info);
return;
}
for(i = 0;i < numDevNames;++i)
free(allDevNameMap[i].name);
allDevNameMap = realloc(allDevNameMap, sizeof(DevMap) * 1);
allDevNameMap[0].name = strdup("ALSA Software on default");
AppendAllDeviceList(allDevNameMap[0].name);
idx = 1;
while(card >= 0) {
sprintf(name, "hw:%d", card);
if ((err = psnd_ctl_open(&handle, name, 0)) < 0) {
AL_PRINT("control open (%i): %s\n", card, psnd_strerror(err));
goto next_card;
}
if ((err = psnd_ctl_card_info(handle, info)) < 0) {
AL_PRINT("control hardware info (%i): %s\n", card, psnd_strerror(err));
psnd_ctl_close(handle);
goto next_card;
}
dev = -1;
while(1) {
const char *cname, *dname;
void *temp;
if (psnd_ctl_pcm_next_device(handle, &dev)<0)
AL_PRINT("snd_ctl_pcm_next_device failed\n");
if (dev < 0)
break;
psnd_pcm_info_set_device(pcminfo, dev);
psnd_pcm_info_set_subdevice(pcminfo, 0);
psnd_pcm_info_set_stream(pcminfo, stream);
if ((err = psnd_ctl_pcm_info(handle, pcminfo)) < 0) {
if (err != -ENOENT)
AL_PRINT("control digital audio info (%i): %s\n", card, psnd_strerror(err));
continue;
}
temp = realloc(allDevNameMap, sizeof(DevMap) * (idx+1));
if(temp)
{
allDevNameMap = temp;
cname = psnd_ctl_card_info_get_name(info);
dname = psnd_pcm_info_get_name(pcminfo);
snprintf(name, sizeof(name), "ALSA Software on %s [%s] (hw:%d,%d)",
cname, dname, card, dev);
AppendAllDeviceList(name);
allDevNameMap[idx].name = strdup(name);
allDevNameMap[idx].card = card;
allDevNameMap[idx].dev = dev;
idx++;
}
}
psnd_ctl_close(handle);
next_card:
if(psnd_card_next(&card) < 0) {
AL_PRINT("snd_card_next failed\n");
break;
}
}
numDevNames = idx;
}
else if(type == CAPTURE_DEVICE_PROBE)
{
stream = SND_PCM_STREAM_CAPTURE;
card = -1;
if(psnd_card_next(&card) < 0 || card < 0) {
AL_PRINT("no capture cards found...\n");
psnd_pcm_info_free(pcminfo);
psnd_ctl_card_info_free(info);
return;
}
for(i = 0;i < numCaptureDevNames;++i)
free(allCaptureDevNameMap[i].name);
allCaptureDevNameMap = realloc(allCaptureDevNameMap, sizeof(DevMap) * 1);
allCaptureDevNameMap[0].name = strdup("ALSA Capture on default");
AppendCaptureDeviceList(allCaptureDevNameMap[0].name);
idx = 1;
while (card >= 0) {
sprintf(name, "hw:%d", card);
handle = NULL;
if ((err = psnd_ctl_open(&handle, name, 0)) < 0) {
AL_PRINT("control open (%i): %s\n", card, psnd_strerror(err));
}
if (err >= 0 && (err = psnd_ctl_card_info(handle, info)) < 0) {
AL_PRINT("control hardware info (%i): %s\n", card, psnd_strerror(err));
}
else if (err >= 0)
{
dev = -1;
while(1) {
const char *cname, *dname;
void *temp;
if (psnd_ctl_pcm_next_device(handle, &dev)<0)
AL_PRINT("snd_ctl_pcm_next_device failed\n");
if (dev < 0)
break;
psnd_pcm_info_set_device(pcminfo, dev);
psnd_pcm_info_set_subdevice(pcminfo, 0);
psnd_pcm_info_set_stream(pcminfo, stream);
if ((err = psnd_ctl_pcm_info(handle, pcminfo)) < 0) {
if (err != -ENOENT)
AL_PRINT("control digital audio info (%i): %s\n", card, psnd_strerror(err));
continue;
}
temp = realloc(allCaptureDevNameMap, sizeof(DevMap) * (idx+1));
if(temp)
{
allCaptureDevNameMap = temp;
cname = psnd_ctl_card_info_get_name(info);
dname = psnd_pcm_info_get_name(pcminfo);
snprintf(name, sizeof(name), "ALSA Capture on %s [%s] (hw:%d,%d)",
cname, dname, card, dev);
AppendCaptureDeviceList(name);
allCaptureDevNameMap[idx].name = strdup(name);
allCaptureDevNameMap[idx].card = card;
allCaptureDevNameMap[idx].dev = dev;
idx++;
}
}
}
if(handle) psnd_ctl_close(handle);
if(psnd_card_next(&card) < 0) {
AL_PRINT("snd_card_next failed\n");
break;
}
}
numCaptureDevNames = idx;
}
psnd_pcm_info_free(pcminfo);
psnd_ctl_card_info_free(info);
}
static ALCboolean alsa_open_capture(ALCdevice *pDevice, const ALCchar *deviceName)
{
const char *devName;
snd_pcm_hw_params_t *p;
snd_pcm_uframes_t bufferSizeInFrames;
ALuint frameSize;
alsa_data *data;
char driver[64];
char *err;
int i;
if(!alsa_handle)
return ALC_FALSE;
strncpy(driver, GetConfigValue("alsa", "capture", "default"), sizeof(driver)-1);
driver[sizeof(driver)-1] = 0;
if(!deviceName)
deviceName = allCaptureDevNameMap[0].name;
else
{
size_t idx;
for(idx = 0;idx < numCaptureDevNames;idx++)
{
if(allCaptureDevNameMap[idx].name &&
strcmp(deviceName, allCaptureDevNameMap[idx].name) == 0)
{
devName = allCaptureDevNameMap[idx].name;
if(idx > 0)
sprintf(driver, "plughw:%d,%d", allCaptureDevNameMap[idx].card, allCaptureDevNameMap[idx].dev);
goto open_alsa;
}
}
return ALC_FALSE;
}
open_alsa:
data = (alsa_data*)calloc(1, sizeof(alsa_data));
i = psnd_pcm_open(&data->pcmHandle, driver, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
if(i < 0)
{
Sleep(200);
i = psnd_pcm_open(&data->pcmHandle, driver, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
}
if(i >= 0)
{
i = psnd_pcm_nonblock(data->pcmHandle, 0);
if(i < 0)
psnd_pcm_close(data->pcmHandle);
}
if(i < 0)
{
free(data);
AL_PRINT("Could not open capture device '%s': %s\n", driver, psnd_strerror(i));
return ALC_FALSE;
}
switch(aluBytesFromFormat(pDevice->Format))
{
case 1:
data->format = SND_PCM_FORMAT_U8;
break;
case 2:
data->format = SND_PCM_FORMAT_S16;
break;
case 4:
data->format = SND_PCM_FORMAT_FLOAT;
break;
default:
AL_PRINT("Unknown format: 0x%x\n", pDevice->Format);
psnd_pcm_close(data->pcmHandle);
free(data);
return ALC_FALSE;
}
err = NULL;
bufferSizeInFrames = pDevice->UpdateSize * pDevice->NumUpdates;
psnd_pcm_hw_params_malloc(&p);
if((i=psnd_pcm_hw_params_any(data->pcmHandle, p)) < 0)
err = "any";
/* set interleaved access */
if(err == NULL && (i=psnd_pcm_hw_params_set_access(data->pcmHandle, p, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
err = "set access";
/* set format (implicitly sets sample bits) */
if(err == NULL && (i=psnd_pcm_hw_params_set_format(data->pcmHandle, p, data->format)) < 0)
err = "set format";
/* set channels (implicitly sets frame bits) */
if(err == NULL && (i=psnd_pcm_hw_params_set_channels(data->pcmHandle, p, aluChannelsFromFormat(pDevice->Format))) < 0)
err = "set channels";
/* set rate (implicitly constrains period/buffer parameters) */
if(err == NULL && (i=psnd_pcm_hw_params_set_rate(data->pcmHandle, p, pDevice->Frequency, 0)) < 0)
err = "set rate near";
/* set buffer size in frame units (implicitly sets period size/bytes/time and buffer time/bytes) */
if(err == NULL && (i=psnd_pcm_hw_params_set_buffer_size_near(data->pcmHandle, p, &bufferSizeInFrames)) < 0)
err = "set buffer size near";
/* install and prepare hardware configuration */
if(err == NULL && (i=psnd_pcm_hw_params(data->pcmHandle, p)) < 0)
err = "set params";
if(err != NULL)
{
AL_PRINT("%s failed: %s\n", err, psnd_strerror(i));
psnd_pcm_hw_params_free(p);
psnd_pcm_close(data->pcmHandle);
free(data);
return ALC_FALSE;
}
if((i=psnd_pcm_hw_params_get_period_size(p, &bufferSizeInFrames, NULL)) < 0)
{
AL_PRINT("get size failed: %s\n", psnd_strerror(i));
psnd_pcm_hw_params_free(p);
psnd_pcm_close(data->pcmHandle);
free(data);
return ALC_FALSE;
}
psnd_pcm_hw_params_free(p);
frameSize = aluChannelsFromFormat(pDevice->Format);
frameSize *= aluBytesFromFormat(pDevice->Format);
data->ring = CreateRingBuffer(frameSize, pDevice->UpdateSize*pDevice->NumUpdates);
if(!data->ring)
{
AL_PRINT("ring buffer create failed\n");
psnd_pcm_close(data->pcmHandle);
free(data);
return ALC_FALSE;
}
data->size = psnd_pcm_frames_to_bytes(data->pcmHandle, bufferSizeInFrames);
data->buffer = malloc(data->size);
if(!data->buffer)
{
AL_PRINT("buffer malloc failed\n");
psnd_pcm_close(data->pcmHandle);
DestroyRingBuffer(data->ring);
free(data);
return ALC_FALSE;
}
pDevice->ExtraData = data;
data->thread = StartThread(ALSANoMMapCaptureProc, pDevice);
if(data->thread == NULL)
{
AL_PRINT("Could not create capture thread\n");
psnd_pcm_close(data->pcmHandle);
DestroyRingBuffer(data->ring);
pDevice->ExtraData = NULL;
free(data->buffer);
free(data);
return ALC_FALSE;
}
pDevice->szDeviceName = strdup(deviceName);
return ALC_TRUE;
}
static ALCboolean alsa_reset_playback(ALCdevice *device)
{
alsa_data *data = (alsa_data*)device->ExtraData;
snd_pcm_uframes_t periodSizeInFrames;
snd_pcm_sw_params_t *sp = NULL;
snd_pcm_hw_params_t *p = NULL;
snd_pcm_access_t access;
unsigned int periods;
unsigned int rate;
int allowmmap;
char *err;
int i;
switch(aluBytesFromFormat(device->Format))
{
case 1:
data->format = SND_PCM_FORMAT_U8;
break;
case 2:
data->format = SND_PCM_FORMAT_S16;
break;
case 4:
data->format = SND_PCM_FORMAT_FLOAT;
break;
default:
AL_PRINT("Unknown format: 0x%x\n", device->Format);
return ALC_FALSE;
}
allowmmap = GetConfigValueBool("alsa", "mmap", 1);
periods = device->NumUpdates;
periodSizeInFrames = device->UpdateSize;
rate = device->Frequency;
err = NULL;
psnd_pcm_hw_params_malloc(&p);
if((i=psnd_pcm_hw_params_any(data->pcmHandle, p)) < 0)
err = "any";
/* set interleaved access */
if(err == NULL && (!allowmmap || (i=psnd_pcm_hw_params_set_access(data->pcmHandle, p, SND_PCM_ACCESS_MMAP_INTERLEAVED)) < 0))
{
if(periods > 2) periods--;
if((i=psnd_pcm_hw_params_set_access(data->pcmHandle, p, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0)
err = "set access";
}
/* set format (implicitly sets sample bits) */
if(err == NULL && (i=psnd_pcm_hw_params_set_format(data->pcmHandle, p, data->format)) < 0)
err = "set format";
/* set channels (implicitly sets frame bits) */
if(err == NULL && (i=psnd_pcm_hw_params_set_channels(data->pcmHandle, p, aluChannelsFromFormat(device->Format))) < 0)
err = "set channels";
/* set periods (implicitly constrains period/buffer parameters) */
if(err == NULL && (i=psnd_pcm_hw_params_set_periods_near(data->pcmHandle, p, &periods, NULL)) < 0)
err = "set periods near";
/* set rate (implicitly constrains period/buffer parameters) */
if(err == NULL && (i=psnd_pcm_hw_params_set_rate_near(data->pcmHandle, p, &rate, NULL)) < 0)
err = "set rate near";
/* set period size in frame units (implicitly sets buffer size/bytes/time and period time/bytes) */
if(err == NULL && (i=psnd_pcm_hw_params_set_period_size_near(data->pcmHandle, p, &periodSizeInFrames, NULL)) < 0)
err = "set period size near";
/* install and prepare hardware configuration */
if(err == NULL && (i=psnd_pcm_hw_params(data->pcmHandle, p)) < 0)
err = "set params";
if(err == NULL && (i=psnd_pcm_hw_params_get_access(p, &access)) < 0)
err = "get access";
if(err == NULL && (i=psnd_pcm_hw_params_get_period_size(p, &periodSizeInFrames, NULL)) < 0)
err = "get period size";
if(err == NULL && (i=psnd_pcm_hw_params_get_periods(p, &periods, NULL)) < 0)
err = "get periods";
if(err != NULL)
{
AL_PRINT("%s failed: %s\n", err, psnd_strerror(i));
psnd_pcm_hw_params_free(p);
return ALC_FALSE;
}
psnd_pcm_hw_params_free(p);
err = NULL;
psnd_pcm_sw_params_malloc(&sp);
if((i=psnd_pcm_sw_params_current(data->pcmHandle, sp)) != 0)
err = "sw current";
if(err == NULL && (i=psnd_pcm_sw_params_set_avail_min(data->pcmHandle, sp, periodSizeInFrames)) != 0)
err = "sw set avail min";
if(err == NULL && (i=psnd_pcm_sw_params(data->pcmHandle, sp)) != 0)
err = "sw set params";
if(err != NULL)
{
AL_PRINT("%s failed: %s\n", err, psnd_strerror(i));
psnd_pcm_sw_params_free(sp);
return ALC_FALSE;
}
psnd_pcm_sw_params_free(sp);
data->size = psnd_pcm_frames_to_bytes(data->pcmHandle, periodSizeInFrames);
if(access == SND_PCM_ACCESS_RW_INTERLEAVED)
{
/* Increase periods by one, since the temp buffer counts as an extra
* period */
periods++;
data->buffer = malloc(data->size);
if(!data->buffer)
{
AL_PRINT("buffer malloc failed\n");
return ALC_FALSE;
}
data->thread = StartThread(ALSANoMMapProc, device);
}
else
{
i = psnd_pcm_prepare(data->pcmHandle);
if(i < 0)
{
AL_PRINT("prepare error: %s\n", psnd_strerror(i));
free(data->buffer);
data->buffer = NULL;
return ALC_FALSE;
}
data->thread = StartThread(ALSAProc, device);
}
if(data->thread == NULL)
{
AL_PRINT("Could not create playback thread\n");
free(data->buffer);
data->buffer = NULL;
return ALC_FALSE;
}
device->UpdateSize = periodSizeInFrames;
device->NumUpdates = periods;
device->Frequency = rate;
return ALC_TRUE;
}
static ALuint ALSAProc(ALvoid *ptr)
{
ALCdevice *pDevice = (ALCdevice*)ptr;
alsa_data *data = (alsa_data*)pDevice->ExtraData;
const snd_pcm_channel_area_t *areas = NULL;
snd_pcm_sframes_t avail, commitres;
snd_pcm_uframes_t offset, frames;
char *WritePtr;
int err;
while(!data->killNow)
{
int state = verify_state(data->pcmHandle);
if(state < 0)
{
AL_PRINT("Invalid state detected: %s\n", psnd_strerror(state));
aluHandleDisconnect(pDevice);
break;
}
avail = psnd_pcm_avail_update(data->pcmHandle);
if(avail < 0)
{
AL_PRINT("available update failed: %s\n", psnd_strerror(avail));
continue;
}
// make sure there's frames to process
if(avail >= 0 && avail < (snd_pcm_sframes_t)pDevice->UpdateSize)
{
if(state != SND_PCM_STATE_RUNNING)
{
err = psnd_pcm_start(data->pcmHandle);
if(err < 0)
{
AL_PRINT("start failed: %s\n", psnd_strerror(err));
continue;
}
}
if(psnd_pcm_wait(data->pcmHandle, 1000) == 0)
AL_PRINT("Wait timeout... buffer size too low?\n");
continue;
}
avail -= avail%pDevice->UpdateSize;
// it is possible that contiguous areas are smaller, thus we use a loop
while(avail > 0)
{
frames = avail;
err = psnd_pcm_mmap_begin(data->pcmHandle, &areas, &offset, &frames);
if(err < 0)
{
AL_PRINT("mmap begin error: %s\n", psnd_strerror(err));
break;
}
WritePtr = (char*)areas->addr + (offset * areas->step / 8);
aluMixData(pDevice, WritePtr, frames);
commitres = psnd_pcm_mmap_commit(data->pcmHandle, offset, frames);
if(commitres < 0 || (commitres-frames) != 0)
{
AL_PRINT("mmap commit error: %s\n",
psnd_strerror(commitres >= 0 ? -EPIPE : commitres));
break;
}
avail -= frames;
}
}
return 0;
}
static ALCuint alsa_available_samples(ALCdevice *Device)
{
alsa_data *data = (alsa_data*)Device->ExtraData;
snd_pcm_sframes_t avail;
avail = (Device->Connected ? psnd_pcm_avail_update(data->pcmHandle) : 0);
if(avail < 0)
{
AL_PRINT("avail update failed: %s\n", psnd_strerror(avail));
if((avail=psnd_pcm_recover(data->pcmHandle, avail, 1)) >= 0 &&
(avail=psnd_pcm_prepare(data->pcmHandle)) >= 0)
{
if(data->doCapture)
avail = psnd_pcm_start(data->pcmHandle);
if(avail >= 0)
avail = psnd_pcm_avail_update(data->pcmHandle);
}
if(avail < 0)
{
AL_PRINT("restore error: %s\n", psnd_strerror(avail));
aluHandleDisconnect(Device);
}
}
while(avail > 0)
{
snd_pcm_sframes_t amt;
amt = psnd_pcm_bytes_to_frames(data->pcmHandle, data->size);
if(avail < amt) amt = avail;
amt = psnd_pcm_readi(data->pcmHandle, data->buffer, amt);
if(amt < 0)
{
AL_PRINT("read error: %s\n", psnd_strerror(amt));
if(amt == -EAGAIN)
continue;
if((amt=psnd_pcm_recover(data->pcmHandle, amt, 1)) >= 0 &&
(amt=psnd_pcm_prepare(data->pcmHandle)) >= 0)
{
if(data->doCapture)
amt = psnd_pcm_start(data->pcmHandle);
if(amt >= 0)
amt = psnd_pcm_avail_update(data->pcmHandle);
}
if(amt < 0)
{
AL_PRINT("restore error: %s\n", psnd_strerror(amt));
aluHandleDisconnect(Device);
break;
}
avail = amt;
continue;
}
WriteRingBuffer(data->ring, data->buffer, amt);
avail -= amt;
}
return RingBufferSize(data->ring);
}
static DevMap *probe_devices(snd_pcm_stream_t stream, ALuint *count)
{
snd_ctl_t *handle;
int card, err, dev, idx;
snd_ctl_card_info_t *info;
snd_pcm_info_t *pcminfo;
DevMap *DevList;
char name[1024];
psnd_ctl_card_info_malloc(&info);
psnd_pcm_info_malloc(&pcminfo);
card = -1;
if((err=psnd_card_next(&card)) < 0)
AL_PRINT("Failed to find a card: %s\n", psnd_strerror(err));
DevList = malloc(sizeof(DevMap) * 1);
DevList[0].name = strdup("ALSA Default");
idx = 1;
while(card >= 0)
{
sprintf(name, "hw:%d", card);
if((err = psnd_ctl_open(&handle, name, 0)) < 0)
{
AL_PRINT("control open (%i): %s\n", card, psnd_strerror(err));
goto next_card;
}
if((err = psnd_ctl_card_info(handle, info)) < 0)
{
AL_PRINT("control hardware info (%i): %s\n", card, psnd_strerror(err));
psnd_ctl_close(handle);
goto next_card;
}
dev = -1;
while(1)
{
const char *cname, *dname;
void *temp;
if(psnd_ctl_pcm_next_device(handle, &dev) < 0)
AL_PRINT("snd_ctl_pcm_next_device failed\n");
if(dev < 0)
break;
psnd_pcm_info_set_device(pcminfo, dev);
psnd_pcm_info_set_subdevice(pcminfo, 0);
psnd_pcm_info_set_stream(pcminfo, stream);
if((err = psnd_ctl_pcm_info(handle, pcminfo)) < 0) {
if(err != -ENOENT)
AL_PRINT("control digital audio info (%i): %s\n", card, psnd_strerror(err));
continue;
}
temp = realloc(DevList, sizeof(DevMap) * (idx+1));
if(temp)
{
DevList = temp;
cname = psnd_ctl_card_info_get_name(info);
dname = psnd_pcm_info_get_name(pcminfo);
snprintf(name, sizeof(name), "%s [%s] (hw:%d,%d) via ALSA",
cname, dname, card, dev);
DevList[idx].name = strdup(name);
DevList[idx].card = card;
DevList[idx].dev = dev;
idx++;
}
}
psnd_ctl_close(handle);
next_card:
if(psnd_card_next(&card) < 0) {
AL_PRINT("snd_card_next failed\n");
break;
}
}
psnd_pcm_info_free(pcminfo);
psnd_ctl_card_info_free(info);
*count = idx;
return DevList;
}
static qboolean QDECL ALSA_InitCard (soundcardinfo_t *sc, const char *pcmname)
{
snd_pcm_t *pcm;
snd_pcm_uframes_t buffer_size;
int err;
snd_pcm_hw_params_t *hw;
snd_pcm_sw_params_t *sw;
#if 0
int bps, stereo;
unsigned int rate;
snd_pcm_uframes_t frag_size;
#endif
qboolean mmap = false;
if (!Alsa_InitAlsa())
{
Con_Printf(CON_ERROR "Alsa does not appear to be installed or compatible\n");
return false;
}
hw = alloca(psnd_pcm_hw_params_sizeof());
sw = alloca(psnd_pcm_sw_params_sizeof());
memset(sw, 0, psnd_pcm_sw_params_sizeof());
memset(hw, 0, psnd_pcm_hw_params_sizeof());
//WARNING: 'default' as the default sucks arse. it adds about a second's worth of lag.
if (!pcmname)
pcmname = "default";
sc->inactive_sound = true; //linux sound devices always play sound, even when we're not the active app...
Con_Printf("Initing ALSA sound device \"%s\"\n", pcmname);
err = psnd_pcm_open (&pcm, pcmname, SND_PCM_STREAM_PLAYBACK,
SND_PCM_NONBLOCK);
if (0 > err)
{
Con_Printf (CON_ERROR "ALSA Error: open error (%s): %s\n", pcmname, psnd_strerror (err));
return 0;
}
Con_Printf ("ALSA: Using PCM %s.\n", pcmname);
#if 1
err = psnd_pcm_set_params(pcm, ((sc->sn.samplebits==8)?SND_PCM_FORMAT_U8:SND_PCM_FORMAT_S16), (mmap?SND_PCM_ACCESS_MMAP_INTERLEAVED:SND_PCM_ACCESS_RW_INTERLEAVED), sc->sn.numchannels, sc->sn.speed, true, 0.04*1000000);
if (0 > err)
{
Con_Printf (CON_ERROR "ALSA: error setting params. %s\n", psnd_strerror (err));
goto error;
}
// sc->sn.numchannels = stereo;
// sc->sn.samplepos = 0;
// sc->sn.samplebits = bps;
sc->samplequeue = buffer_size = 2048;
#else
err = psnd_pcm_hw_params_any (pcm, hw);
if (0 > err)
{
Con_Printf (CON_ERROR "ALSA: error setting hw_params_any. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_hw_params_set_access (pcm, hw, mmap?SND_PCM_ACCESS_MMAP_INTERLEAVED:SND_PCM_ACCESS_RW_INTERLEAVED);
if (0 > err)
{
Con_Printf (CON_ERROR "ALSA: Failure to set interleaved PCM access. %s\n", psnd_strerror (err));
goto error;
}
// get sample bit size
bps = sc->sn.samplebits;
{
snd_pcm_format_t spft;
if (bps == 16)
spft = SND_PCM_FORMAT_S16;
else
spft = SND_PCM_FORMAT_U8;
err = psnd_pcm_hw_params_set_format (pcm, hw, spft);
while (err < 0)
{
if (spft == SND_PCM_FORMAT_S16)
{
bps = 8;
spft = SND_PCM_FORMAT_U8;
}
else
{
Con_Printf (CON_ERROR "ALSA: no usable formats. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_hw_params_set_format (pcm, hw, spft);
}
}
// get speaker channels
stereo = sc->sn.numchannels;
err = psnd_pcm_hw_params_set_channels (pcm, hw, stereo);
while (err < 0)
{
if (stereo > 2)
stereo = 2;
else if (stereo > 1)
stereo = 1;
else
{
Con_Printf (CON_ERROR "ALSA: no usable number of channels. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_hw_params_set_channels (pcm, hw, stereo);
}
// get rate
rate = sc->sn.speed;
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0);
while (err < 0)
{
if (rate > 48000)
rate = 48000;
else if (rate > 44100)
rate = 44100;
else if (rate > 22150)
rate = 22150;
else if (rate > 11025)
rate = 11025;
else if (rate > 800)
rate = 800;
else
{
Con_Printf (CON_ERROR "ALSA: no usable rates. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_hw_params_set_rate_near (pcm, hw, &rate, 0);
}
if (rate > 11025)
frag_size = 8 * bps * rate / 11025;
else
frag_size = 8 * bps;
err = psnd_pcm_hw_params_set_period_size_near (pcm, hw, &frag_size, 0);
if (0 > err)
{
Con_Printf (CON_ERROR "ALSA: unable to set period size near %i. %s\n", (int) frag_size, psnd_strerror (err));
goto error;
}
err = psnd_pcm_hw_params (pcm, hw);
if (0 > err) {
Con_Printf (CON_ERROR "ALSA: unable to install hw params: %s\n",
psnd_strerror (err));
goto error;
}
err = psnd_pcm_sw_params_current (pcm, sw);
if (0 > err) {
Con_Printf (CON_ERROR "ALSA: unable to determine current sw params. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_sw_params_set_start_threshold (pcm, sw, ~0U);
if (0 > err) {
Con_Printf (CON_ERROR "ALSA: unable to set playback threshold. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_sw_params_set_stop_threshold (pcm, sw, ~0U);
if (0 > err) {
Con_Printf (CON_ERROR "ALSA: unable to set playback stop threshold. %s\n", psnd_strerror (err));
goto error;
}
err = psnd_pcm_sw_params (pcm, sw);
if (0 > err) {
Con_Printf (CON_ERROR "ALSA: unable to install sw params. %s\n", psnd_strerror (err));
goto error;
}
sc->sn.numchannels = stereo;
sc->sn.samplepos = 0;
sc->sn.samplebits = bps;
buffer_size = sc->sn.samples / stereo;
if (buffer_size)
{
err = psnd_pcm_hw_params_set_buffer_size_near(pcm, hw, &buffer_size);
if (err < 0)
{
Con_Printf (CON_ERROR "ALSA: unable to set buffer size. %s\n", psnd_strerror (err));
goto error;
}
}
err = psnd_pcm_hw_params_get_buffer_size (hw, &buffer_size);
if (0 > err) {
Con_Printf (CON_ERROR "ALSA: unable to get buffer size. %s\n", psnd_strerror (err));
goto error;
}
sc->sn.speed = rate;
#endif
sc->sn.samples = buffer_size * sc->sn.numchannels; // mono samples in buffer
sc->handle = pcm;
sc->Lock = ALSA_LockBuffer;
sc->Unlock = ALSA_UnlockBuffer;
sc->Shutdown = ALSA_Shutdown;
if (mmap)
{
sc->GetDMAPos = ALSA_MMap_GetDMAPos;
sc->Submit = ALSA_MMap_Submit;
sc->GetDMAPos(sc); // sets shm->buffer
//alsa doesn't seem to like high mixahead values
//(maybe it tells us above somehow...)
//so force it lower
//quake's default of 0.2 was for 10fps rendering anyway
//so force it down to 0.1 which is the default for halflife at least, and should give better latency
{
extern cvar_t _snd_mixahead;
if (_snd_mixahead.value >= 0.2)
{
Con_Printf("Alsa Hack: _snd_mixahead forced lower\n");
_snd_mixahead.value = 0.1;
}
}
}
else
{
sc->GetDMAPos = ALSA_RW_GetDMAPos;
sc->Submit = ALSA_RW_Submit;
sc->samplequeue = sc->sn.samples;
sc->sn.buffer = malloc(sc->sn.samples * (sc->sn.samplebits/8));
err = psnd_pcm_prepare(pcm);
if (0 > err)
{
Con_Printf (CON_ERROR "ALSA: unable to prepare for use. %s\n", psnd_strerror (err));
goto error;
}
}
return true;
error:
psnd_pcm_close (pcm);
return false;
}
