bool CAESinkALSA::Initialize(AEAudioFormat &format, std::string &device)
{
m_initDevice = device;
m_initFormat = format;
/* if we are raw, correct the data format */
if (AE_IS_RAW(format.m_dataFormat))
{
m_channelLayout = GetChannelLayout(format);
format.m_dataFormat = AE_FMT_S16NE;
m_passthrough = true;
}
else
{
m_channelLayout = GetChannelLayout(format);
m_passthrough = false;
}
if (m_channelLayout.Count() == 0)
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - Unable to open the requested channel layout");
return false;
}
format.m_channelLayout = m_channelLayout;
/* if passthrough we need the additional AES flags */
if (m_passthrough)
GetPassthroughDevice(format, device);
m_device = device;
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Attempting to open device %s", device.c_str());
/* get the sound config */
snd_config_t *config;
snd_config_copy(&config, snd_config);
int error;
error = snd_pcm_open_lconf(&m_pcm, device.c_str(), SND_PCM_STREAM_PLAYBACK, ALSA_OPTIONS, config);
if (error < 0)
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - snd_pcm_open_lconf(%d) - %s", error, device.c_str());
snd_config_delete(config);
return false;
}
/* free the sound config */
snd_config_delete(config);
if (!InitializeHW(format) || !InitializeSW(format))
return false;
snd_pcm_nonblock(m_pcm, 1);
snd_pcm_prepare (m_pcm);
m_format = format;
m_formatSampleRateMul = 1.0 / (double)m_format.m_sampleRate;
return true;
}
/* Work around PulseAudio ALSA plugin bug where the PA server forces a
higher than requested latency, but the plugin does not update its (and
ALSA's) internal state to reflect that, leading to an immediate underrun
situation. Inspired by WINE's make_handle_underrun_config.
Reference: http://mailman.alsa-project.org/pipermail/alsa-devel/2012-July/05 */
static snd_config_t *
init_local_config_with_workaround(char const * pcm_name)
{
int r;
snd_config_t * lconf;
snd_config_t * pcm_node;
snd_config_t * node;
char const * string;
char node_name[64];
lconf = NULL;
if (snd_config == NULL) {
return NULL;
}
r = snd_config_copy(&lconf, snd_config);
if (r < 0) {
return NULL;
}
do {
r = snd_config_search_definition(lconf, "pcm", pcm_name, &pcm_node);
if (r < 0) {
break;
}
r = snd_config_get_id(pcm_node, &string);
if (r < 0) {
break;
}
r = snprintf(node_name, sizeof(node_name), "pcm.%s", string);
if (r < 0 || r > (int) sizeof(node_name)) {
break;
}
r = snd_config_search(lconf, node_name, &pcm_node);
if (r < 0) {
break;
}
/* If this PCM has a slave, walk the slave configurations until we reach the bottom. */
while ((node = get_slave_pcm_node(lconf, pcm_node)) != NULL) {
pcm_node = node;
}
/* Fetch the PCM node's type, and bail out if it's not the PulseAudio plugin. */
r = snd_config_search(pcm_node, "type", &node);
if (r < 0) {
break;
}
r = snd_config_get_string(node, &string);
if (r < 0) {
break;
}
if (strcmp(string, "pulse") != 0) {
break;
}
/* Don't clobber an explicit existing handle_underrun value, set it only
if it doesn't already exist. */
r = snd_config_search(pcm_node, "handle_underrun", &node);
if (r != -ENOENT) {
break;
}
/* Disable pcm_pulse's asynchronous underrun handling. */
r = snd_config_imake_integer(&node, "handle_underrun", 0);
if (r < 0) {
break;
}
r = snd_config_add(pcm_node, node);
if (r < 0) {
break;
}
return lconf;
} while (0);
snd_config_delete(lconf);
return NULL;
}
void CAESinkALSA::EnumerateDevicesEx(AEDeviceInfoList &list, bool force)
{
/* ensure that ALSA has been initialized */
snd_lib_error_set_handler(sndLibErrorHandler);
if(!snd_config || force)
{
if(force)
snd_config_update_free_global();
snd_config_update();
}
snd_config_t *config;
snd_config_copy(&config, snd_config);
/* Always enumerate the default device.
* Note: If "default" is a stereo device, EnumerateDevice()
* will automatically add "@" instead to enable surroundXX mangling.
* We don't want to do that if "default" can handle multichannel
* itself (e.g. in case of a pulseaudio server). */
EnumerateDevice(list, "default", "", config);
void **hints;
if (snd_device_name_hint(-1, "pcm", &hints) < 0)
{
CLog::Log(LOGINFO, "CAESinkALSA - Unable to get a list of devices");
return;
}
std::string defaultDescription;
for (void** hint = hints; *hint != NULL; ++hint)
{
char *io = snd_device_name_get_hint(*hint, "IOID");
char *name = snd_device_name_get_hint(*hint, "NAME");
char *desc = snd_device_name_get_hint(*hint, "DESC");
if ((!io || strcmp(io, "Output") == 0) && name
&& strcmp(name, "null") != 0)
{
std::string baseName = std::string(name);
baseName = baseName.substr(0, baseName.find(':'));
if (strcmp(name, "default") == 0)
{
/* added already, but lets get the description if we have one */
if (desc)
defaultDescription = desc;
}
else if (baseName == "front")
{
/* Enumerate using the surroundXX mangling */
/* do not enumerate basic "front", it is already handled
* by the default "@" entry added in the very beginning */
if (strcmp(name, "front") != 0)
EnumerateDevice(list, std::string("@") + (name+5), desc ? desc : name, config);
}
/* Do not enumerate "default", it is already enumerated above. */
/* Do not enumerate the sysdefault or surroundXX devices, those are
* always accompanied with a "front" device and it is handled above
* as "@". The below devices will be automatically used if available
* for a "@" device. */
/* Ubuntu has patched their alsa-lib so that "defaults.namehint.extended"
* defaults to "on" instead of upstream "off", causing lots of unwanted
* extra devices (many of which are not actually routed properly) to be
* found by the enumeration process. Skip them as well ("hw", "dmix",
* "plughw", "dsnoop"). */
else if (baseName != "default"
&& baseName != "sysdefault"
&& baseName != "surround40"
&& baseName != "surround41"
&& baseName != "surround50"
&& baseName != "surround51"
&& baseName != "surround71"
&& baseName != "hw"
&& baseName != "dmix"
&& baseName != "plughw"
&& baseName != "dsnoop")
{
EnumerateDevice(list, name, desc ? desc : name, config);
}
}
free(io);
free(name);
free(desc);
}
snd_device_name_free_hint(hints);
/* set the displayname for default device */
if (!list.empty() && list[0].m_deviceName == "default")
{
/* If we have one from a hint (DESC), use it */
if (!defaultDescription.empty())
list[0].m_displayName = defaultDescription;
/* Otherwise use the discovered name or (unlikely) "Default" */
else if (list[0].m_displayName.empty())
list[0].m_displayName = "Default";
}
/* lets check uniqueness, we may need to append DEV or CARD to DisplayName */
/* If even a single device of card/dev X clashes with Y, add suffixes to
* all devices of both them, for clarity. */
/* clashing card names, e.g. "NVidia", "NVidia_2" */
std::set<std::string> cardsToAppend;
/* clashing basename + cardname combinations, e.g. ("hdmi","Nvidia") */
std::set<std::pair<std::string, std::string> > devsToAppend;
for (AEDeviceInfoList::iterator it1 = list.begin(); it1 != list.end(); ++it1)
{
for (AEDeviceInfoList::iterator it2 = it1+1; it2 != list.end(); ++it2)
{
if (it1->m_displayName == it2->m_displayName
&& it1->m_displayNameExtra == it2->m_displayNameExtra)
{
/* something needs to be done */
std::string cardString1 = GetParamFromName(it1->m_deviceName, "CARD");
std::string cardString2 = GetParamFromName(it2->m_deviceName, "CARD");
if (cardString1 != cardString2)
{
/* card name differs, add identifiers to all devices */
cardsToAppend.insert(cardString1);
cardsToAppend.insert(cardString2);
continue;
}
std::string devString1 = GetParamFromName(it1->m_deviceName, "DEV");
std::string devString2 = GetParamFromName(it2->m_deviceName, "DEV");
if (devString1 != devString2)
{
/* device number differs, add identifiers to all such devices */
devsToAppend.insert(std::make_pair(it1->m_deviceName.substr(0, it1->m_deviceName.find(':')), cardString1));
devsToAppend.insert(std::make_pair(it2->m_deviceName.substr(0, it2->m_deviceName.find(':')), cardString2));
continue;
}
/* if we got here, the configuration is really weird, just append the whole device string */
it1->m_displayName += " (" + it1->m_deviceName + ")";
it2->m_displayName += " (" + it2->m_deviceName + ")";
}
}
}
for (std::set<std::string>::iterator it = cardsToAppend.begin();
it != cardsToAppend.end(); ++it)
{
for (AEDeviceInfoList::iterator itl = list.begin(); itl != list.end(); ++itl)
{
std::string cardString = GetParamFromName(itl->m_deviceName, "CARD");
if (cardString == *it)
/* "HDA NVidia (NVidia)", "HDA NVidia (NVidia_2)", ... */
itl->m_displayName += " (" + cardString + ")";
}
}
for (std::set<std::pair<std::string, std::string> >::iterator it = devsToAppend.begin();
it != devsToAppend.end(); ++it)
{
for (AEDeviceInfoList::iterator itl = list.begin(); itl != list.end(); ++itl)
{
std::string baseName = itl->m_deviceName.substr(0, itl->m_deviceName.find(':'));
std::string cardString = GetParamFromName(itl->m_deviceName, "CARD");
if (baseName == it->first && cardString == it->second)
{
std::string devString = GetParamFromName(itl->m_deviceName, "DEV");
/* "HDMI #0", "HDMI #1" ... */
itl->m_displayNameExtra += " #" + devString;
}
}
}
}
bool CAESinkALSA::Initialize(AEAudioFormat &format, std::string &device)
{
CAEChannelInfo channelLayout;
m_initDevice = device;
m_initFormat = format;
/* if we are raw, correct the data format */
if (AE_IS_RAW(format.m_dataFormat))
{
channelLayout = GetChannelLayout(format);
format.m_dataFormat = AE_FMT_S16NE;
m_passthrough = true;
}
else
{
channelLayout = GetChannelLayout(format);
m_passthrough = false;
}
#if defined(HAS_LIBAMCODEC)
if (aml_present())
{
aml_set_audio_passthrough(m_passthrough);
device = "default";
}
#endif
if (channelLayout.Count() == 0)
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - Unable to open the requested channel layout");
return false;
}
format.m_channelLayout = channelLayout;
AEDeviceType devType = AEDeviceTypeFromName(device);
std::string AESParams;
/* digital interfaces should have AESx set, though in practice most
* receivers don't care */
if (m_passthrough || devType == AE_DEVTYPE_HDMI || devType == AE_DEVTYPE_IEC958)
GetAESParams(format, AESParams);
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Attempting to open device \"%s\"", device.c_str());
/* get the sound config */
snd_config_t *config;
snd_config_copy(&config, snd_config);
if (!OpenPCMDevice(device, AESParams, channelLayout.Count(), &m_pcm, config))
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - failed to initialize device \"%s\"", device.c_str());
snd_config_delete(config);
return false;
}
/* get the actual device name that was used */
device = snd_pcm_name(m_pcm);
m_device = device;
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Opened device \"%s\"", device.c_str());
/* free the sound config */
snd_config_delete(config);
if (!InitializeHW(format) || !InitializeSW(format))
return false;
// we want it blocking
snd_pcm_nonblock(m_pcm, 0);
snd_pcm_prepare (m_pcm);
m_format = format;
m_formatSampleRateMul = 1.0 / (double)m_format.m_sampleRate;
return true;
}
bool CAESinkALSA::Initialize(AEAudioFormat &format, std::string &device)
{
m_initDevice = device;
m_initFormat = format;
/* if we are raw, correct the data format */
if (AE_IS_RAW(format.m_dataFormat))
{
m_channelLayout = GetChannelLayout(format);
format.m_dataFormat = AE_FMT_S16NE;
m_passthrough = true;
}
else
{
m_channelLayout = GetChannelLayout(format);
m_passthrough = false;
}
if (m_channelLayout.Count() == 0)
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - Unable to open the requested channel layout");
return false;
}
format.m_channelLayout = m_channelLayout;
AEDeviceType devType = AEDeviceTypeFromName(device);
std::string AESParams;
/* digital interfaces should have AESx set, though in practice most
* receivers don't care */
if (m_passthrough || devType == AE_DEVTYPE_HDMI || devType == AE_DEVTYPE_IEC958)
GetAESParams(format, AESParams);
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Attempting to open device \"%s\"", device.c_str());
/* get the sound config */
snd_config_t *config;
snd_config_copy(&config, snd_config);
snd_config_t *dmixRateConf;
long dmixRate;
if (snd_config_search(config, "defaults.pcm.dmix.rate", &dmixRateConf) < 0
|| snd_config_get_integer(dmixRateConf, &dmixRate) < 0)
dmixRate = 48000; /* assume default */
/* Prefer dmix for non-passthrough stereo when sample rate matches */
if (!OpenPCMDevice(device, AESParams, m_channelLayout.Count(), &m_pcm, config, format.m_sampleRate == dmixRate && !m_passthrough))
{
CLog::Log(LOGERROR, "CAESinkALSA::Initialize - failed to initialize device \"%s\"", device.c_str());
snd_config_delete(config);
return false;
}
/* get the actual device name that was used */
device = snd_pcm_name(m_pcm);
m_device = device;
CLog::Log(LOGINFO, "CAESinkALSA::Initialize - Opened device \"%s\"", device.c_str());
/* free the sound config */
snd_config_delete(config);
if (!InitializeHW(format) || !InitializeSW(format))
return false;
snd_pcm_nonblock(m_pcm, 1);
snd_pcm_prepare (m_pcm);
m_format = format;
m_formatSampleRateMul = 1.0 / (double)m_format.m_sampleRate;
return true;
}
/* Work around PulseAudio ALSA plugin bug where the PA server forces a
higher than requested latency, but the plugin does not update its (and
ALSA's) internal state to reflect that, leading to an immediate underrun
situation. Inspired by WINE's make_handle_underrun_config.
Reference: http://mailman.alsa-project.org/pipermail/alsa-devel/2012-July/053391.html
From Mozilla https://github.com/kinetiknz/cubeb/blob/1aa0058d0729eb85505df104cd1ac072432c6d24/src/cubeb_alsa.c
*/
static snd_config_t *init_local_config_with_workaround(ao_device *device, char const *name){
char pcm_node_name[80];
int r;
snd_config_t * lconf;
snd_config_t * device_node;
snd_config_t * type_node;
snd_config_t * node;
char const * type_string;
lconf = NULL;
snprintf(pcm_node_name,80,"pcm.%s",name);
if (snd_config == NULL) snd_config_update();
r = snd_config_copy(&lconf, snd_config);
if(r<0){
return NULL;
}
r = snd_config_search(lconf, pcm_node_name, &device_node);
if (r != 0) {
snd_config_delete(lconf);
return NULL;
}
/* Fetch the PCM node's type, and bail out if it's not the PulseAudio plugin. */
r = snd_config_search(device_node, "type", &type_node);
if (r != 0) {
snd_config_delete(lconf);
return NULL;
}
r = snd_config_get_string(type_node, &type_string);
if (r != 0) {
snd_config_delete(lconf);
return NULL;
}
if (strcmp(type_string, "pulse") != 0) {
snd_config_delete(lconf);
return NULL;
}
/* Don't clobber an explicit existing handle_underrun value, set it only
if it doesn't already exist. */
r = snd_config_search(device_node, "handle_underrun", &node);
if (r != -ENOENT) {
snd_config_delete(lconf);
return NULL;
}
r = snd_config_imake_integer(&node, "handle_underrun", 0);
if (r != 0) {
snd_config_delete(lconf);
return NULL;
}
r = snd_config_add(device_node, node);
if (r != 0) {
snd_config_delete(lconf);
return NULL;
}
adebug("PulseAudio ALSA-emulation detected: disabling underrun detection\n");
return lconf;
}
void CAESinkALSA::EnumerateDevicesEx(AEDeviceInfoList &list)
{
/* ensure that ALSA has been initialized */
if(!snd_config)
snd_config_update();
snd_ctl_t *ctlhandle;
snd_pcm_t *pcmhandle;
snd_ctl_card_info_t *ctlinfo;
snd_ctl_card_info_alloca(&ctlinfo);
memset(ctlinfo, 0, snd_ctl_card_info_sizeof());
snd_pcm_hw_params_t *hwparams;
snd_pcm_hw_params_alloca(&hwparams);
memset(hwparams, 0, snd_pcm_hw_params_sizeof());
snd_pcm_info_t *pcminfo;
snd_pcm_info_alloca(&pcminfo);
memset(pcminfo, 0, snd_pcm_info_sizeof());
/* get the sound config */
snd_config_t *config;
snd_config_copy(&config, snd_config);
std::string strHwName;
int n_cards = -1;
while (snd_card_next(&n_cards) == 0 && n_cards != -1)
{
std::stringstream sstr;
sstr << "hw:" << n_cards;
std::string strHwName = sstr.str();
if (snd_ctl_open_lconf(&ctlhandle, strHwName.c_str(), 0, config) != 0)
{
CLog::Log(LOGDEBUG, "CAESinkALSA::EnumerateDevicesEx - Unable to open control for device %s", strHwName.c_str());
continue;
}
if (snd_ctl_card_info(ctlhandle, ctlinfo) != 0)
{
CLog::Log(LOGDEBUG, "CAESinkALSA::EnumerateDevicesEx - Unable to get card control info for device %s", strHwName.c_str());
snd_ctl_close(ctlhandle);
continue;
}
snd_hctl_t *hctl;
if (snd_hctl_open_ctl(&hctl, ctlhandle) != 0)
hctl = NULL;
snd_hctl_load(hctl);
int pcm_index = 0;
int iec958_index = 0;
int hdmi_index = 0;
int dev = -1;
while (snd_ctl_pcm_next_device(ctlhandle, &dev) == 0 && dev != -1)
{
snd_pcm_info_set_device (pcminfo, dev);
snd_pcm_info_set_subdevice(pcminfo, 0 );
snd_pcm_info_set_stream (pcminfo, SND_PCM_STREAM_PLAYBACK);
if (snd_ctl_pcm_info(ctlhandle, pcminfo) < 0)
{
CLog::Log(LOGDEBUG, "CAESinkALSA::EnumerateDevicesEx - Skipping device %s,%d as it does not have PCM playback ability", strHwName.c_str(), dev);
continue;
}
int dev_index;
sstr.str(std::string());
CAEDeviceInfo info;
std::string devname = snd_pcm_info_get_name(pcminfo);
bool maybeHDMI = false;
/* detect HDMI */
if (devname.find("HDMI") != std::string::npos)
{
info.m_deviceType = AE_DEVTYPE_HDMI;
dev_index = hdmi_index++;
sstr << "hdmi";
}
else
{
/* detect IEC958 */
/* some HDMI devices (intel) report Digital for HDMI also */
if (devname.find("Digital") != std::string::npos)
maybeHDMI = true;
if (maybeHDMI || devname.find("IEC958" ) != std::string::npos)
{
info.m_deviceType = AE_DEVTYPE_IEC958;
dev_index = iec958_index; /* dont increment, it might be HDMI */
sstr << "iec958";
}
else
{
info.m_deviceType = AE_DEVTYPE_PCM;
dev_index = pcm_index++;
sstr << "hw";
}
}
/* build the driver string to pass to ALSA */
sstr << ":CARD=" << snd_ctl_card_info_get_id(ctlinfo) << ",DEV=" << dev_index;
info.m_deviceName = sstr.str();
/* get the friendly display name*/
info.m_displayName = snd_ctl_card_info_get_name(ctlinfo);
info.m_displayNameExtra = devname;
/* open the device for testing */
int err = snd_pcm_open_lconf(&pcmhandle, info.m_deviceName.c_str(), SND_PCM_STREAM_PLAYBACK, 0, config);
/* if open of possible IEC958 failed and it could be HDMI, try as HDMI */
if (err < 0 && maybeHDMI)
{
/* check for HDMI if it failed */
sstr.str(std::string());
dev_index = hdmi_index;
sstr << "hdmi";
sstr << ":CARD=" << snd_ctl_card_info_get_id(ctlinfo) << ",DEV=" << dev_index;
info.m_deviceName = sstr.str();
err = snd_pcm_open_lconf(&pcmhandle, info.m_deviceName.c_str(), SND_PCM_STREAM_PLAYBACK, 0, config);
/* if it was valid, increment the index and set the type */
if (err >= 0)
{
++hdmi_index;
info.m_deviceType = AE_DEVTYPE_HDMI;
}
}
/* if it's still IEC958, increment the index */
if (info.m_deviceType == AE_DEVTYPE_IEC958)
++iec958_index;
/* final error check */
if (err < 0)
{
CLog::Log(LOGINFO, "CAESinkALSA::EnumerateDevicesEx - Unable to open %s for capability detection", strHwName.c_str());
continue;
}
/* see if we can get ELD for this device */
if (info.m_deviceType == AE_DEVTYPE_HDMI)
{
bool badHDMI = false;
if (hctl && !GetELD(hctl, dev, info, badHDMI))
CLog::Log(LOGDEBUG, "CAESinkALSA::EnumerateDevicesEx - Unable to obtain ELD information for device %s, make sure you have ALSA >= 1.0.25", info.m_deviceName.c_str());
if (badHDMI)
{
CLog::Log(LOGDEBUG, "CAESinkALSA::EnumerateDevicesEx - Skipping HDMI device %s as it has no ELD data", info.m_deviceName.c_str());
continue;
}
}
/* ensure we can get a playback configuration for the device */
if (snd_pcm_hw_params_any(pcmhandle, hwparams) < 0)
{
CLog::Log(LOGINFO, "CAESinkALSA::EnumerateDevicesEx - No playback configurations available for device %s", info.m_deviceName.c_str());
snd_pcm_close(pcmhandle);
continue;
}
/* 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 = 1; i <= ALSA_MAX_CHANNELS; ++i)
if (snd_pcm_hw_params_test_channels(pcmhandle, hwparams, i) >= 0)
channels = i;
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);
}
/* snd_hctl_close also closes ctlhandle */
if (hctl)
snd_hctl_close(hctl);
else
snd_ctl_close(ctlhandle);
}
}
