void CAESinkALSA::EnumerateDevice(AEDeviceInfoList &list, const std::string &device, const std::string &description, snd_config_t *config)
{
snd_pcm_t *pcmhandle = NULL;
if (!OpenPCMDevice(device, "", ALSA_MAX_CHANNELS, &pcmhandle, config))
return;
snd_pcm_info_t *pcminfo;
snd_pcm_info_alloca(&pcminfo);
memset(pcminfo, 0, snd_pcm_info_sizeof());
int err = snd_pcm_info(pcmhandle, pcminfo);
if (err < 0)
{
CLog::Log(LOGINFO, "CAESinkALSA - Unable to get pcm_info for \"%s\"", device.c_str());
snd_pcm_close(pcmhandle);
}
int cardNr = snd_pcm_info_get_card(pcminfo);
CAEDeviceInfo info;
info.m_deviceName = device;
info.m_deviceType = AEDeviceTypeFromName(device);
if (cardNr >= 0)
{
/* "HDA NVidia", "HDA Intel", "HDA ATI HDMI", "SB Live! 24-bit External", ... */
char *cardName;
if (snd_card_get_name(cardNr, &cardName) == 0)
info.m_displayName = cardName;
if (info.m_deviceType == AE_DEVTYPE_HDMI && info.m_displayName.size() > 5 &&
info.m_displayName.substr(info.m_displayName.size()-5) == " HDMI")
{
/* We already know this is HDMI, strip it */
info.m_displayName.erase(info.m_displayName.size()-5);
}
/* "CONEXANT Analog", "USB Audio", "HDMI 0", "ALC889 Digital" ... */
std::string pcminfoName = snd_pcm_info_get_name(pcminfo);
/*
* Filter "USB Audio", in those cases snd_card_get_name() is more
* meaningful already
*/
if (pcminfoName != "USB Audio")
info.m_displayNameExtra = pcminfoName;
if (info.m_deviceType == AE_DEVTYPE_HDMI)
{
/* replace, this was likely "HDMI 0" */
info.m_displayNameExtra = "HDMI";
int dev = snd_pcm_info_get_device(pcminfo);
if (dev >= 0)
{
/* lets see if we can get ELD info */
snd_ctl_t *ctlhandle;
std::stringstream sstr;
sstr << "hw:" << cardNr;
std::string strHwName = sstr.str();
if (snd_ctl_open_lconf(&ctlhandle, strHwName.c_str(), 0, config) == 0)
{
snd_hctl_t *hctl;
if (snd_hctl_open_ctl(&hctl, ctlhandle) == 0)
{
snd_hctl_load(hctl);
bool badHDMI = false;
if (!GetELD(hctl, dev, info, badHDMI))
CLog::Log(LOGDEBUG, "CAESinkALSA - Unable to obtain ELD information for device \"%s\" (not supported by device, or kernel older than 3.2)",
device.c_str());
/* snd_hctl_close also closes ctlhandle */
snd_hctl_close(hctl);
if (badHDMI)
{
/*
* Warn about disconnected devices, but keep them enabled
* Detection can go wrong on Intel, Nvidia and on all
* AMD (fglrx) hardware, so it is not safe to close those
* handles
*/
CLog::Log(LOGDEBUG, "CAESinkALSA - HDMI device \"%s\" may be unconnected (no ELD data)", device.c_str());
}
}
else
{
snd_ctl_close(ctlhandle);
}
}
}
}
else if (info.m_deviceType == AE_DEVTYPE_IEC958)
{
/* append instead of replace, pcminfoName is useful for S/PDIF */
if (!info.m_displayNameExtra.empty())
info.m_displayNameExtra += ' ';
info.m_displayNameExtra += "S/PDIF";
}
else if (info.m_displayNameExtra.empty())
{
/* for USB audio, it gets a bit confusing as there is
* - "SB Live! 24-bit External"
* - "SB Live! 24-bit External, S/PDIF"
* so add "Analog" qualifier to the first one */
info.m_displayNameExtra = "Analog";
}
/* "default" is a device that will be used for all inputs, while
* "@" will be mangled to front/default/surroundXX as necessary */
if (device == "@" || device == "default")
{
/* Make it "Default (whatever)" */
info.m_displayName = "Default (" + info.m_displayName + (info.m_displayNameExtra.empty() ? "" : " " + info.m_displayNameExtra + ")");
info.m_displayNameExtra = "";
}
}
else
{
/* virtual devices: "default", "pulse", ... */
/* description can be e.g. "PulseAudio Sound Server" - for hw devices it is
* normally uninteresting, like "HDMI Audio Output" or "Default Audio Device",
* so we only use it for virtual devices that have no better display name */
info.m_displayName = description;
}
snd_pcm_hw_params_t *hwparams;
snd_pcm_hw_params_alloca(&hwparams);
memset(hwparams, 0, snd_pcm_hw_params_sizeof());
/* ensure we can get a playback configuration for the device */
if (snd_pcm_hw_params_any(pcmhandle, hwparams) < 0)
{
CLog::Log(LOGINFO, "CAESinkALSA - No playback configurations available for device \"%s\"", device.c_str());
snd_pcm_close(pcmhandle);
return;
}
/* detect the available sample rates */
for (unsigned int *rate = ALSASampleRateList; *rate != 0; ++rate)
if (snd_pcm_hw_params_test_rate(pcmhandle, hwparams, *rate, 0) >= 0)
info.m_sampleRates.push_back(*rate);
/* detect the channels available */
int channels = 0;
for (int i = ALSA_MAX_CHANNELS; i >= 1; --i)
{
/* Reopen the device if needed on the special "surroundXX" cases */
if (info.m_deviceType == AE_DEVTYPE_PCM && (i == 8 || i == 6 || i == 4))
OpenPCMDevice(device, "", i, &pcmhandle, config);
if (snd_pcm_hw_params_test_channels(pcmhandle, hwparams, i) >= 0)
{
channels = i;
break;
}
}
if (device == "default" && channels == 2)
{
/* This looks like the ALSA standard default stereo dmix device, we
* probably want to use "@" instead to get surroundXX. */
snd_pcm_close(pcmhandle);
EnumerateDevice(list, "@", description, config);
return;
}
CAEChannelInfo alsaChannels;
for (int i = 0; i < channels; ++i)
{
if (!info.m_channels.HasChannel(ALSAChannelMap[i]))
info.m_channels += ALSAChannelMap[i];
alsaChannels += ALSAChannelMap[i];
}
/* remove the channels from m_channels that we cant use */
info.m_channels.ResolveChannels(alsaChannels);
/* detect the PCM sample formats that are available */
for (enum AEDataFormat i = AE_FMT_MAX; i > AE_FMT_INVALID; i = (enum AEDataFormat)((int)i - 1))
{
if (AE_IS_RAW(i) || i == AE_FMT_MAX)
continue;
snd_pcm_format_t fmt = AEFormatToALSAFormat(i);
if (fmt == SND_PCM_FORMAT_UNKNOWN)
continue;
if (snd_pcm_hw_params_test_format(pcmhandle, hwparams, fmt) >= 0)
info.m_dataFormats.push_back(i);
}
snd_pcm_close(pcmhandle);
list.push_back(info);
}
void ALSAAudioCaptureDevice::enumerateDevices(std::vector<AudioCaptureDevice::DeviceIdPtr>& devices)
{
/* Enumerate all ALSA cards and devices: */
int cardIndex=-1; // Start with first card
while(true)
{
/* Get the index of the next card: */
if(snd_card_next(&cardIndex)!=0||cardIndex<0)
{
/* There was an error, or there are no more cards: */
break;
}
/* Open the card's control interface: */
char cardName[20];
snprintf(cardName,sizeof(cardName),"hw:%d",cardIndex);
snd_ctl_t* cardHandle;
if(snd_ctl_open(&cardHandle,cardName,0)!=0)
break;
/* Enumerate all PCM devices on this card: */
int numCardDevices=0;
int pcmIndex=-1;
while(true)
{
/* Get the index of the next PCM device: */
if(snd_ctl_pcm_next_device(cardHandle,&pcmIndex)!=0||pcmIndex<0)
{
/* There was an error, or there are no more PCM devices: */
break;
}
/* Create an info structure for the PCM device: */
snd_pcm_info_t* pcmInfo;
snd_pcm_info_alloca(&pcmInfo);
snd_pcm_info_set_device(pcmInfo,pcmIndex);
snd_pcm_info_set_stream(pcmInfo,SND_PCM_STREAM_CAPTURE);
/* Get the number of capture subdevices for the device: */
if(snd_ctl_pcm_info(cardHandle,pcmInfo)!=0)
break;
int numSubDevices=snd_pcm_info_get_subdevices_count(pcmInfo);
for(int subDeviceIndex=0;subDeviceIndex<numSubDevices;++subDeviceIndex)
{
/* Query information about the subdevice: */
snd_pcm_info_set_subdevice(pcmInfo,subDeviceIndex);
if(snd_ctl_pcm_info(cardHandle,pcmInfo)==0)
{
/* Query the card's name: */
char* cardName;
if(snd_card_get_name(cardIndex,&cardName)==0)
{
/* Create a device ID: */
std::string deviceName=cardName;
free(cardName);
if(numCardDevices>0)
{
char suffix[10];
snprintf(suffix,sizeof(suffix),":%d",numCardDevices);
deviceName.append(suffix);
}
DeviceId* newDeviceId=new DeviceId(deviceName);
/* Set the PCM device name: */
char pcmDeviceName[20];
if(numSubDevices>1)
snprintf(pcmDeviceName,sizeof(pcmDeviceName),"plughw:%d,%d,%d",snd_pcm_info_get_card(pcmInfo),snd_pcm_info_get_device(pcmInfo),snd_pcm_info_get_subdevice(pcmInfo));
else
snprintf(pcmDeviceName,sizeof(pcmDeviceName),"plughw:%d,%d",snd_pcm_info_get_card(pcmInfo),snd_pcm_info_get_device(pcmInfo));
newDeviceId->pcmDeviceName=pcmDeviceName;
/* Store the device ID: */
devices.push_back(newDeviceId);
++numCardDevices;
}
}
}
}
/* Close the card's control interface: */
snd_ctl_close(cardHandle);
}
}
// for each ALSA device, call iterator. userData is passed to the iterator
// returns total number of iterations
int iteratePCMDevices(DeviceIteratorPtr iterator, void* userData) {
int count = 0;
int subdeviceCount;
int card, dev, subDev;
char devname[16];
int err;
snd_ctl_t *handle;
snd_pcm_t *pcm;
snd_pcm_info_t* pcminfo;
snd_ctl_card_info_t *cardinfo, *defcardinfo = NULL;
UINT32 deviceID;
int doContinue = TRUE;
snd_pcm_info_malloc(&pcminfo);
snd_ctl_card_info_malloc(&cardinfo);
// 1st try "default" device
err = snd_pcm_open(&pcm, ALSA_DEFAULT_DEVICE_NAME,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if (err < 0) {
// try with the other direction
err = snd_pcm_open(&pcm, ALSA_DEFAULT_DEVICE_NAME,
SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
}
if (err < 0) {
ERROR1("ERROR: snd_pcm_open (\"default\"): %s\n", snd_strerror(err));
} else {
err = snd_pcm_info(pcm, pcminfo);
snd_pcm_close(pcm);
if (err < 0) {
ERROR1("ERROR: snd_pcm_info (\"default\"): %s\n",
snd_strerror(err));
} else {
// try to get card info
card = snd_pcm_info_get_card(pcminfo);
if (card >= 0) {
sprintf(devname, ALSA_HARDWARE_CARD, card);
if (snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK) >= 0) {
if (snd_ctl_card_info(handle, cardinfo) >= 0) {
defcardinfo = cardinfo;
}
snd_ctl_close(handle);
}
}
// call callback function for the device
if (iterator != NULL) {
doContinue = (*iterator)(ALSA_DEFAULT_DEVICE_ID, pcminfo,
defcardinfo, userData);
}
count++;
}
}
// iterate cards
card = -1;
while (doContinue) {
if (snd_card_next(&card) < 0) {
break;
}
if (card < 0) {
break;
}
sprintf(devname, ALSA_HARDWARE_CARD, card);
TRACE1("Opening alsa device \"%s\"...\n", devname);
err = snd_ctl_open(&handle, devname, SND_CTL_NONBLOCK);
if (err < 0) {
ERROR2("ERROR: snd_ctl_open, card=%d: %s\n",
card, snd_strerror(err));
} else {
err = snd_ctl_card_info(handle, cardinfo);
if (err < 0) {
ERROR2("ERROR: snd_ctl_card_info, card=%d: %s\n",
card, snd_strerror(err));
} else {
dev = -1;
while (doContinue) {
if (snd_ctl_pcm_next_device(handle, &dev) < 0) {
ERROR0("snd_ctl_pcm_next_device\n");
}
if (dev < 0) {
break;
}
snd_pcm_info_set_device(pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0);
snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_PLAYBACK);
err = snd_ctl_pcm_info(handle, pcminfo);
if (err == -ENOENT) {
// try with the other direction
snd_pcm_info_set_stream(pcminfo, SND_PCM_STREAM_CAPTURE);
err = snd_ctl_pcm_info(handle, pcminfo);
}
if (err < 0) {
if (err != -ENOENT) {
ERROR2("ERROR: snd_ctl_pcm_info, card=%d: %s",
card, snd_strerror(err));
}
} else {
subdeviceCount = needEnumerateSubdevices(ALSA_PCM) ?
snd_pcm_info_get_subdevices_count(pcminfo) : 1;
if (iterator!=NULL) {
for (subDev = 0; subDev < subdeviceCount; subDev++) {
deviceID = encodeDeviceID(card, dev, subDev);
doContinue = (*iterator)(deviceID, pcminfo,
cardinfo, userData);
count++;
if (!doContinue) {
break;
}
}
} else {
count += subdeviceCount;
}
}
} // of while(doContinue)
}
snd_ctl_close(handle);
}
}
snd_ctl_card_info_free(cardinfo);
snd_pcm_info_free(pcminfo);
return count;
}
static int
alsa_setup(struct snd_format* f) {
int err;
snd_pcm_hw_params_t* hwparams;
snd_pcm_sw_params_t* swparams;
unsigned int alsa_buffer_time, alsa_period_time;
snd_pcm_uframes_t alsa_buffer_size, alsa_period_size;
free(outputf);
outputf = snd_format_alloc(f->rate, f->channels);
printf(" Opening device %s ... ", alsa_cb.pcm_device);
if((err = snd_pcm_open(&alsa_pcm, alsa_cb.pcm_device,
SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) {
printf("alsa_setup(): Failed to open pcm device (%s): %s\n",
alsa_cb.pcm_device, snd_strerror(-err));
alsa_pcm = NULL;
free(outputf);
outputf = NULL;
return -1;
}
/* doesn't care about non-blocking */
/* snd_pcm_nonblock(alsa_pcm, 0); */
if(0) { //debug
snd_pcm_info_t* info;
int alsa_card, alsa_device, alsa_subdevice;
snd_pcm_info_alloca(&info);
snd_pcm_info(alsa_pcm, info);
alsa_card = snd_pcm_info_get_card(info);
alsa_device = snd_pcm_info_get_device(info);
alsa_subdevice = snd_pcm_info_get_subdevice(info);
printf("Card %i, Device %i, Subdevice %i\n",
alsa_card, alsa_device, alsa_subdevice);
}
snd_pcm_hw_params_alloca(&hwparams);
if((err = snd_pcm_hw_params_any(alsa_pcm, hwparams)) < 0) {
printf("alsa_setup(): No configuration available for "
"playback: %s\n", snd_strerror(-err));
return -1;
}
if((err = snd_pcm_hw_params_set_access(alsa_pcm, hwparams,
SND_PCM_ACCESS_RW_INTERLEAVED)) <
0) {
printf("alsa_setup(): Cannot set direct write mode: %s\n",
snd_strerror(-err));
return -1;
}
if((err =
snd_pcm_hw_params_set_format(alsa_pcm, hwparams,
outputf->format)) < 0) {
printf("alsa_setup(): Sample format not "
"available for playback: %s\n", snd_strerror(-err));
return -1;
}
if((err = snd_pcm_hw_params_set_channels_near(alsa_pcm, hwparams,
&outputf->channels)) < 0) {
printf
("alsa_setup(): snd_pcm_hw_params_set_channels_near failed: %s.\n",
snd_strerror(-err));
return -1;
}
snd_pcm_hw_params_set_rate_near(alsa_pcm, hwparams, &outputf->rate, 0);
if(outputf->rate == 0) {
printf("alsa_setup(): No usable samplerate available.\n");
return -1;
}
outputf->sample_bits = snd_pcm_format_physical_width(outputf->format);
outputf->bps =
(outputf->rate * outputf->sample_bits * outputf->channels) >> 3;
alsa_buffer_time = alsa_cb.buffer_time * 1000;
if((err = snd_pcm_hw_params_set_buffer_time_near(alsa_pcm, hwparams,
&alsa_buffer_time,
0)) < 0) {
printf("alsa_setup(): Set buffer time failed: %s.\n",
snd_strerror(-err));
return -1;
}
alsa_period_time = alsa_cb.period_time * 1000;
if((err = snd_pcm_hw_params_set_period_time_near(alsa_pcm, hwparams,
&alsa_period_time,
0)) < 0) {
printf("alsa_setup(): Set period time failed: %s.\n",
snd_strerror(-err));
return -1;
}
if(snd_pcm_hw_params(alsa_pcm, hwparams) < 0) {
printf("alsa_setup(): Unable to install hw params\n");
return -1;
}
if((err =
snd_pcm_hw_params_get_buffer_size(hwparams, &alsa_buffer_size)) < 0) {
printf("alsa_setup(): snd_pcm_hw_params_get_buffer_size() "
"failed: %s\n", snd_strerror(-err));
return -1;
}
if((err =
snd_pcm_hw_params_get_period_size(hwparams, &alsa_period_size,
0)) < 0) {
printf("alsa_setup(): snd_pcm_hw_params_get_period_size() "
"failed: %s\n", snd_strerror(-err));
return -1;
}
snd_pcm_sw_params_alloca(&swparams);
snd_pcm_sw_params_current(alsa_pcm, swparams);
if((err = snd_pcm_sw_params_set_start_threshold(alsa_pcm,
swparams,
alsa_buffer_size -
alsa_period_size) < 0))
printf("alsa_setup(): setting start " "threshold failed: %s\n",
snd_strerror(-err));
if(snd_pcm_sw_params(alsa_pcm, swparams) < 0) {
printf("alsa_setup(): Unable to install sw params\n");
return -1;
}
hw_buffer_size = snd_pcm_frames_to_bytes(alsa_pcm, alsa_buffer_size);
hw_period_size = snd_pcm_frames_to_bytes(alsa_pcm, alsa_period_size);
if(inputf->bps != outputf->bps) {
int align = (inputf->sample_bits * inputf->channels) / 8;
hw_buffer_size_in = ((u_int) hw_buffer_size * inputf->bps +
outputf->bps / 2) / outputf->bps;
hw_period_size_in = ((u_int) hw_period_size * inputf->bps +
outputf->bps / 2) / outputf->bps;
hw_buffer_size_in -= hw_buffer_size_in % align;
hw_period_size_in -= hw_period_size_in % align;
} else {
hw_buffer_size_in = hw_buffer_size;
hw_period_size_in = hw_period_size;
}
#if 0
printf("Device setup: buffer time: %i, size: %i.\n", alsa_buffer_time,
hw_buffer_size);
printf("Device setup: period time: %i, size: %i.\n", alsa_period_time,
hw_period_size);
printf("bits per sample: %i; frame size: %i; Bps: %i\n",
snd_pcm_format_physical_width(outputf->format),
snd_pcm_frames_to_bytes(alsa_pcm, 1), outputf->bps);
#endif
printf("success.\n");
return 0;
}
