bool CALSAAudioCapabilities::ProbeDevice()
{
if (allSampleRateTableSize > NUM_ELEMENTS_IN_ARRAY(m_samplingRates)) {
error_message("Number of sample rates exceeds audio cap array");
return false;
}
// Open PCM
snd_pcm_t *pcm_handle;
snd_pcm_stream_t stream = SND_PCM_STREAM_CAPTURE;
snd_pcm_hw_params_t *hwparams;
snd_pcm_hw_params_alloca(&hwparams);
int err;
if ((err= snd_pcm_open(&pcm_handle, m_deviceName, stream, SND_PCM_NONBLOCK)) < 0) {
error_message("Failed to open %s: %s", m_deviceName, snd_strerror(err));
return false;
}
m_canOpen = true;
if ((err = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
error_message("Broken configuration for playback: no configurations available: %s\n", snd_strerror(err));
return false;
}
// union of valid sampling rates for MP3 and AAC
// for all possible sampling rates
u_int8_t i;
for (i = 0; i < allSampleRateTableSize; i++) {
u_int32_t targetRate = allSampleRateTable[i];
if (snd_pcm_hw_params_test_rate(pcm_handle, hwparams, targetRate, 0) != 0) {
debug_message("audio device %s doesn't support sampling rate %u",
m_deviceName, targetRate);
continue;
}
debug_message("sampling rate %u supported", targetRate);
// valid sampling rate
m_samplingRates[m_numSamplingRates++] = targetRate;
}
// zero out remaining sampling rate entries
for (i = m_numSamplingRates; i < allSampleRateTableSize; i++) {
m_samplingRates[i] = 0;
}
snd_pcm_close(pcm_handle);
return true;
}
/**
* Checks if sound card supports the chosen parameters.
*
* @returns true if hardware supports it
* @throws AudioOutputException - if device cannot be accessed
*/
bool AudioOutputDeviceAlsa::HardwareParametersSupported(String card, uint channels, int samplerate, uint numfragments, uint fragmentsize) throw (AudioOutputException) {
pcm_name = "hw:" + card;
int err;
if ((err = snd_pcm_open(&pcm_handle, pcm_name.c_str(), stream, SND_PCM_NONBLOCK)) < 0) {
throw AudioOutputException(String("Error opening PCM device ") + pcm_name + ": " + snd_strerror(err));
}
snd_pcm_hw_params_alloca(&hwparams);
if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
#if WORDS_BIGENDIAN
if (snd_pcm_hw_params_test_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_BE) < 0)
#else // little endian
if (snd_pcm_hw_params_test_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_LE) < 0)
#endif
{
snd_pcm_close(pcm_handle);
return false;
}
int dir = 0;
if (snd_pcm_hw_params_test_rate(pcm_handle, hwparams, samplerate, dir) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_channels(pcm_handle, hwparams, channels) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_periods(pcm_handle, hwparams, numfragments, dir) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_buffer_size(pcm_handle, hwparams, (fragmentsize * numfragments)) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
snd_pcm_close(pcm_handle);
return true;
}
static void
as_setup_rate_combo (GawSndData *snd)
{
unsigned int rate = snd->sparams->rate;
GtkWidget *combo = snd->w_rate;
snd_pcm_t *pcm;
snd_pcm_hw_params_t *hwparams;
char **p;
unsigned int val;
int i ;
int err;
for ( i = snd->n_rate ; i > 0; i-- ){
gtk_combo_box_text_remove (GTK_COMBO_BOX_TEXT (combo), i - 1 );
}
snd->n_rate = 0;
snd_pcm_hw_params_alloca(&hwparams);
err = snd_pcm_open(&pcm, snd->sparams->device_name, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
if ( err < 0 ) {
return;
}
err = snd_pcm_hw_params_any(pcm, hwparams);
if ( err < 0 ) {
snd_pcm_close(pcm);
return;
}
for ( p = as_rate_list, i = 0 ; *p ; p++, i++ ){
val = (unsigned int) g_ascii_strtoull ( *p, NULL, 10 );
if ( snd_pcm_hw_params_test_rate ( pcm, hwparams, val, 0 ) < 0 ){
continue;
}
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), *p);
// msg_dbg("as_rate %d '%s'", snd->n_rate, *p );
snd->n_rate++;
if ( val == rate ) {
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), i);
}
}
snd_pcm_close(pcm);
}
static void get_rate_range(Instance *pi, Range *range)
{
int i;
int rc;
ALSAio_private *priv = (ALSAio_private *)pi;
if (!priv->c.handle) {
fprintf(stderr, "*** device is not open!\n");
return;
}
Range_clear(range);
range->type = RANGE_INT_ENUM;
for (i=0; i < table_size(rates); i++) {
rc = snd_pcm_hw_params_test_rate(priv->c.handle, priv->c.hwparams, rates[i], 0);
if (rc == 0) {
fprintf(stderr, " rate %d is available\n", rates[i]);
Array_append(range->int_enums, rates[i]);
}
}
}
bool test_open(const char *device, unsigned rates[]) {
int err;
snd_pcm_t *pcm;
snd_pcm_hw_params_t *hw_params;
hw_params = (snd_pcm_hw_params_t *) alloca(snd_pcm_hw_params_sizeof());
memset(hw_params, 0, snd_pcm_hw_params_sizeof());
// open device
if ((err = snd_pcm_open(&pcm, device, SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
LOG_ERROR("playback open error: %s", snd_strerror(err));
return false;
}
// get max params
if ((err = snd_pcm_hw_params_any(pcm, hw_params)) < 0) {
LOG_ERROR("hwparam init error: %s", snd_strerror(err));
return false;
}
// find supported sample rates to enable client side resampling of non supported rates
unsigned i, ind;
unsigned ref[] TEST_RATES;
for (i = 0, ind = 0; ref[i]; ++i) {
if (snd_pcm_hw_params_test_rate(pcm, hw_params, ref[i], 0) == 0) {
rates[ind++] = ref[i];
}
}
if ((err = snd_pcm_close(pcm)) < 0) {
LOG_ERROR("snd_pcm_close error: %s", snd_strerror(err));
return false;
}
return true;
}
size_t stack_alsa_audio_device_list_outputs(StackAudioDeviceDesc **outputs)
{
static const int common_sample_rates[] = {8000, 11025, 16000, 22050, 32000, 44100, 48000, 88200, 96000, 176400, 192000};
static const size_t num_common_sample_rates = 11;
// Initialise pulse audio
if (!stack_init_alsa_audio())
{
// Failed to initialise, return NULL
*outputs = NULL;
return 0;
}
// Get some hints
void **hints = NULL;
int result = snd_device_name_hint(-1, "pcm", &hints);
if (result != 0)
{
*outputs = NULL;
return 0;
}
size_t alsa_device_count = 0, stack_device_count = 0;
// Count how many devices we find
for (size_t i = 0; hints[i] != NULL; i++)
{
alsa_device_count = i + 1;
}
// If there are no devices, return immediately
if (alsa_device_count == 0)
{
snd_device_name_free_hint(hints);
*outputs = NULL;
return 0;
}
StackAudioDeviceDesc* devices = new StackAudioDeviceDesc[alsa_device_count];
// Iterate over the devices and build information
for (size_t alsa_device_idx = 0, stack_device_idx = 0; alsa_device_idx < alsa_device_count; alsa_device_idx++)
{
char *name = snd_device_name_get_hint(hints[alsa_device_idx], "NAME");
char *desc = snd_device_name_get_hint(hints[alsa_device_idx], "DESC");
// Open the device
snd_pcm_t* pcm = NULL;
if (snd_pcm_open(&pcm, name, SND_PCM_STREAM_PLAYBACK, 0) != 0)
{
free(name);
free(desc);
continue;
}
// Get parameters
snd_pcm_hw_params_t* hw_params = NULL;
snd_pcm_hw_params_malloc(&hw_params);
snd_pcm_hw_params_any(pcm, hw_params);
// Get minimum and maximum number of channels
unsigned int min, max;
snd_pcm_hw_params_get_channels_min(hw_params, &min);
snd_pcm_hw_params_get_channels_max(hw_params, &max);
// Limit the maximum to 32 channels, as some devices return "-1" channels
if (max > 32)
{
max = 32;
}
// Store channel counts
devices[stack_device_idx].min_channels = min;
devices[stack_device_idx].max_channels = max;
// Get minimum and maximum sample rates
int dir;
snd_pcm_hw_params_get_rate_min(hw_params, &min, &dir);
snd_pcm_hw_params_get_rate_max(hw_params, &max, &dir);
// Iterate over our common sample rates and see which ones are valid
size_t sample_rate_count = 0;
for (size_t common_rate_idx = 0; common_rate_idx < num_common_sample_rates; common_rate_idx++)
{
if (common_sample_rates[common_rate_idx] >= min && common_sample_rates[common_rate_idx] <= max)
{
if (snd_pcm_hw_params_test_rate(pcm, hw_params, common_sample_rates[common_rate_idx], 0) == 0)
{
sample_rate_count++;
}
}
}
// Store the sample rates
devices[stack_device_idx].num_rates = sample_rate_count;
if (sample_rate_count > 0)
{
devices[stack_device_idx].rates = new uint32_t[sample_rate_count];
for (size_t rate_idx = 0, common_rate_idx = 0; common_rate_idx < num_common_sample_rates; common_rate_idx++)
{
if (common_sample_rates[common_rate_idx] >= min && common_sample_rates[common_rate_idx] <= max)
{
devices[stack_device_idx].rates[rate_idx] = common_sample_rates[common_rate_idx];
rate_idx++;
}
}
}
else
{
devices[stack_device_idx].rates = NULL;
}
// Store the name and description
devices[stack_device_idx].name = strdup(name);
devices[stack_device_idx].desc = strdup(desc);
// Tidy up
free(name);
free(desc);
snd_pcm_hw_params_free(hw_params);
snd_pcm_close(pcm);
stack_device_count++;
stack_device_idx++;
}
// Tidy up
snd_device_name_free_hint(hints);
// We can technically return an array that contains more elements than
// we say (if a device fails to open, for example), but this is not a
// problem, as we only allocate and indeed free the internals of the
// number we say, but we tidy up the whole array
*outputs = devices;
return stack_device_count;
}
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);
}
bool QAudioDeviceInfoInternal::testSettings(const QAudioFormat& format) const
{
// Set nearest to closest settings that do work.
// See if what is in settings will work (return value).
int err = 0;
snd_pcm_t* handle;
snd_pcm_hw_params_t *params;
QString dev = device;
QList<QByteArray> devices = QAudioDeviceInfoInternal::availableDevices(QAudio::AudioOutput);
if(dev.compare(QLatin1String("default")) == 0) {
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
dev = QLatin1String(devices.first().constData());
#else
dev = QLatin1String("hw:0,0");
#endif
} else {
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
dev = device;
#else
int idx = 0;
char *name;
QString shortName = device.mid(device.indexOf(QLatin1String("="),0)+1);
while(snd_card_get_name(idx,&name) == 0) {
if(shortName.compare(QLatin1String(name)) == 0)
break;
idx++;
}
dev = QString(QLatin1String("hw:%1,0")).arg(idx);
#endif
}
if(mode == QAudio::AudioOutput) {
err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
} else {
err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_CAPTURE,0);
}
if(err < 0) {
handle = 0;
return false;
}
bool testChannel = false;
bool testCodec = false;
bool testFreq = false;
bool testType = false;
bool testSize = false;
int dir = 0;
snd_pcm_nonblock( handle, 0 );
snd_pcm_hw_params_alloca( ¶ms );
snd_pcm_hw_params_any( handle, params );
// set the values!
snd_pcm_hw_params_set_channels(handle,params,format.channels());
snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);
err = -1;
switch(format.sampleSize()) {
case 8:
if(format.sampleType() == QAudioFormat::SignedInt)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
else if(format.sampleType() == QAudioFormat::UnSignedInt)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
break;
case 16:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
}
break;
case 32:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
}
}
// For now, just accept only audio/pcm codec
if(!format.codec().startsWith(QLatin1String("audio/pcm"))) {
err=-1;
} else
testCodec = true;
if(err>=0 && format.channels() != -1) {
err = snd_pcm_hw_params_test_channels(handle,params,format.channels());
if(err>=0)
err = snd_pcm_hw_params_set_channels(handle,params,format.channels());
if(err>=0)
testChannel = true;
}
if(err>=0 && format.frequency() != -1) {
err = snd_pcm_hw_params_test_rate(handle,params,format.frequency(),0);
if(err>=0)
err = snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);
if(err>=0)
testFreq = true;
}
if((err>=0 && format.sampleSize() != -1) &&
(format.sampleType() != QAudioFormat::Unknown)) {
switch(format.sampleSize()) {
case 8:
if(format.sampleType() == QAudioFormat::SignedInt)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
else if(format.sampleType() == QAudioFormat::UnSignedInt)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
break;
case 16:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
}
break;
case 32:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
}
}
if(err>=0) {
testSize = true;
testType = true;
}
}
if(err>=0)
err = snd_pcm_hw_params(handle, params);
if(err == 0) {
// settings work
// close()
if(handle)
snd_pcm_close(handle);
return true;
}
if(handle)
snd_pcm_close(handle);
return false;
}
bool QAudioDeviceInfoInternal::testSettings(const QAudioFormat& format) const
{
// Set nearest to closest settings that do work.
// See if what is in settings will work (return value).
int err = 0;
snd_pcm_t* handle;
snd_pcm_hw_params_t *params;
QString dev = device;
// open()
if(!dev.contains(QLatin1String("default"))) {
int idx = snd_card_get_index(dev.toLocal8Bit().constData());
dev = QString(QLatin1String("hw:%1,0")).arg(idx);
}
if(mode == QAudio::AudioOutput) {
err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_PLAYBACK,0);
} else {
err=snd_pcm_open( &handle,dev.toLocal8Bit().constData(),SND_PCM_STREAM_CAPTURE,0);
}
if(err < 0) {
handle = 0;
return false;
}
bool testChannel = false;
bool testCodec = false;
bool testFreq = false;
bool testType = false;
bool testSize = false;
int dir = 0;
snd_pcm_nonblock( handle, 0 );
snd_pcm_hw_params_alloca( ¶ms );
snd_pcm_hw_params_any( handle, params );
// set the values!
snd_pcm_hw_params_set_channels(handle,params,format.channels());
snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);
switch(format.sampleSize()) {
case 8:
if(format.sampleType() == QAudioFormat::SignedInt)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
else if(format.sampleType() == QAudioFormat::UnSignedInt)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
break;
case 16:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
}
break;
case 32:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
}
}
// For now, just accept only audio/pcm codec
if(!format.codec().startsWith(QLatin1String("audio/pcm"))) {
err=-1;
} else
testCodec = true;
if(err>=0 && format.channels() != -1) {
err = snd_pcm_hw_params_test_channels(handle,params,format.channels());
if(err>=0)
err = snd_pcm_hw_params_set_channels(handle,params,format.channels());
if(err>=0)
testChannel = true;
}
if(err>=0 && format.frequency() != -1) {
err = snd_pcm_hw_params_test_rate(handle,params,format.frequency(),0);
if(err>=0)
err = snd_pcm_hw_params_set_rate(handle,params,format.frequency(),dir);
if(err>=0)
testFreq = true;
}
if((err>=0 && format.sampleSize() != -1) &&
(format.sampleType() != QAudioFormat::Unknown)) {
switch(format.sampleSize()) {
case 8:
if(format.sampleType() == QAudioFormat::SignedInt)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S8);
else if(format.sampleType() == QAudioFormat::UnSignedInt)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U8);
break;
case 16:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S16_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U16_BE);
}
break;
case 32:
if(format.sampleType() == QAudioFormat::SignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_S32_BE);
} else if(format.sampleType() == QAudioFormat::UnSignedInt) {
if(format.byteOrder() == QAudioFormat::LittleEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_LE);
else if(format.byteOrder() == QAudioFormat::BigEndian)
err = snd_pcm_hw_params_set_format(handle,params,SND_PCM_FORMAT_U32_BE);
}
}
if(err>=0) {
testSize = true;
testType = true;
}
}
if(err>=0)
err = snd_pcm_hw_params(handle, params);
if(err == 0) {
// settings work
// close()
if(handle)
snd_pcm_close(handle);
return true;
}
if(handle)
snd_pcm_close(handle);
return false;
}
bool QAlsaAudioDeviceInfo::testSettings(const QAudioFormat& format) const
{
// Set nearest to closest settings that do work.
// See if what is in settings will work (return value).
int err = -1;
snd_pcm_t* pcmHandle;
snd_pcm_hw_params_t *params;
QString dev;
#if(SND_LIB_MAJOR == 1 && SND_LIB_MINOR == 0 && SND_LIB_SUBMINOR >= 14)
dev = device;
if (dev.compare(QLatin1String("default")) == 0) {
QList<QByteArray> devices = availableDevices(QAudio::AudioOutput);
if (!devices.isEmpty())
dev = QLatin1String(devices.first().constData());
}
#else
if (dev.compare(QLatin1String("default")) == 0) {
dev = QLatin1String("hw:0,0");
} else {
int idx = 0;
char *name;
QString shortName = device.mid(device.indexOf(QLatin1String("="),0)+1);
while(snd_card_get_name(idx,&name) == 0) {
if(shortName.compare(QLatin1String(name)) == 0)
break;
idx++;
}
dev = QString(QLatin1String("hw:%1,0")).arg(idx);
}
#endif
snd_pcm_stream_t stream = mode == QAudio::AudioOutput
? SND_PCM_STREAM_PLAYBACK : SND_PCM_STREAM_CAPTURE;
if (snd_pcm_open(&pcmHandle, dev.toLocal8Bit().constData(), stream, 0) < 0)
return false;
snd_pcm_nonblock(pcmHandle, 0);
snd_pcm_hw_params_alloca(¶ms);
snd_pcm_hw_params_any(pcmHandle, params);
// set the values!
snd_pcm_hw_params_set_channels(pcmHandle, params, format.channelCount());
snd_pcm_hw_params_set_rate(pcmHandle, params, format.sampleRate(), 0);
snd_pcm_format_t pcmFormat = SND_PCM_FORMAT_UNKNOWN;
switch (format.sampleSize()) {
case 8:
if (format.sampleType() == QAudioFormat::SignedInt)
pcmFormat = SND_PCM_FORMAT_S8;
else if (format.sampleType() == QAudioFormat::UnSignedInt)
pcmFormat = SND_PCM_FORMAT_U8;
break;
case 16:
if (format.sampleType() == QAudioFormat::SignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_S16_LE : SND_PCM_FORMAT_S16_BE;
} else if (format.sampleType() == QAudioFormat::UnSignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_U16_LE : SND_PCM_FORMAT_U16_BE;
}
break;
case 32:
if (format.sampleType() == QAudioFormat::SignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_S32_LE : SND_PCM_FORMAT_S32_BE;
} else if (format.sampleType() == QAudioFormat::UnSignedInt) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_U32_LE : SND_PCM_FORMAT_U32_BE;
} else if (format.sampleType() == QAudioFormat::Float) {
pcmFormat = format.byteOrder() == QAudioFormat::LittleEndian
? SND_PCM_FORMAT_FLOAT_LE : SND_PCM_FORMAT_FLOAT_BE;
}
}
if (pcmFormat != SND_PCM_FORMAT_UNKNOWN)
err = snd_pcm_hw_params_set_format(pcmHandle, params, pcmFormat);
// For now, just accept only audio/pcm codec
if (!format.codec().startsWith(QLatin1String("audio/pcm")))
err = -1;
if (err >= 0 && format.channelCount() != -1) {
err = snd_pcm_hw_params_test_channels(pcmHandle, params, format.channelCount());
if (err >= 0)
err = snd_pcm_hw_params_set_channels(pcmHandle, params, format.channelCount());
}
if (err >= 0 && format.sampleRate() != -1) {
err = snd_pcm_hw_params_test_rate(pcmHandle, params, format.sampleRate(), 0);
if (err >= 0)
err = snd_pcm_hw_params_set_rate(pcmHandle, params, format.sampleRate(), 0);
}
if (err >= 0 && pcmFormat != SND_PCM_FORMAT_UNKNOWN)
err = snd_pcm_hw_params_set_format(pcmHandle, params, pcmFormat);
if (err >= 0)
err = snd_pcm_hw_params(pcmHandle, params);
snd_pcm_close(pcmHandle);
return (err == 0);
}
int main(int argc, char *argv[])
{
const char *device_name = "hw";
snd_pcm_t *pcm;
snd_pcm_hw_params_t *hw_params;
unsigned int i;
unsigned int min, max;
int any_rate;
int err;
if (argc > 1)
device_name = argv[1];
err = snd_pcm_open(&pcm, device_name, SND_PCM_STREAM_CAPTURE,
SND_PCM_NONBLOCK);
if (err < 0) {
fprintf(stderr, "cannot open device '%s': %s\n", device_name,
snd_strerror(err));
return 1;
}
snd_pcm_hw_params_alloca(&hw_params);
err = snd_pcm_hw_params_any(pcm, hw_params);
if (err < 0) {
fprintf(stderr, "cannot get hardware parameters: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Device: %s (type: %s)\n", device_name,
snd_pcm_type_name(snd_pcm_type(pcm)));
printf("Access types:");
for (i = 0; i < ARRAY_SIZE(accesses); ++i) {
if (!snd_pcm_hw_params_test_access(pcm, hw_params, accesses[i]))
printf(" %s", snd_pcm_access_name(accesses[i]));
}
putchar('\n');
printf("Formats:");
for (i = 0; i < ARRAY_SIZE(formats); ++i) {
if (!snd_pcm_hw_params_test_format(pcm, hw_params, formats[i]))
printf(" %s", snd_pcm_format_name(formats[i]));
}
putchar('\n');
err = snd_pcm_hw_params_get_channels_min(hw_params, &min);
if (err < 0) {
fprintf(stderr, "cannot get minimum channels count: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_channels_max(hw_params, &max);
if (err < 0) {
fprintf(stderr, "cannot get maximum channels count: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Channels:");
for (i = min; i <= max; ++i) {
if (!snd_pcm_hw_params_test_channels(pcm, hw_params, i))
printf(" %u", i);
}
putchar('\n');
err = snd_pcm_hw_params_get_rate_min(hw_params, &min, NULL);
if (err < 0) {
fprintf(stderr, "cannot get minimum rate: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_rate_max(hw_params, &max, NULL);
if (err < 0) {
fprintf(stderr, "cannot get maximum rate: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Sample rates:");
if (min == max)
printf(" %u", min);
else if (!snd_pcm_hw_params_test_rate(pcm, hw_params, min + 1, 0))
printf(" %u-%u", min, max);
else {
any_rate = 0;
for (i = 0; i < ARRAY_SIZE(rates); ++i) {
if (!snd_pcm_hw_params_test_rate(pcm, hw_params,
rates[i], 0)) {
any_rate = 1;
printf(" %u", rates[i]);
}
}
if (!any_rate)
printf(" %u-%u", min, max);
}
putchar('\n');
err = snd_pcm_hw_params_get_period_time_min(hw_params, &min, NULL);
if (err < 0) {
fprintf(stderr, "cannot get minimum period time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_period_time_max(hw_params, &max, NULL);
if (err < 0) {
fprintf(stderr, "cannot get maximum period time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Interrupt interval: %u-%u us\n", min, max);
err = snd_pcm_hw_params_get_buffer_time_min(hw_params, &min, NULL);
if (err < 0) {
fprintf(stderr, "cannot get minimum buffer time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
err = snd_pcm_hw_params_get_buffer_time_max(hw_params, &max, NULL);
if (err < 0) {
fprintf(stderr, "cannot get maximum buffer time: %s\n",
snd_strerror(err));
snd_pcm_close(pcm);
return 1;
}
printf("Buffer size: %u-%u us\n", min, max);
snd_pcm_close(pcm);
return 0;
}
int AlsaIO::Initialize(uint Channels, uint Samplerate, uint Fragments, uint FragmentSize, String Card) {
this->uiChannels = Channels;
this->uiSamplerate = Samplerate;
this->uiMaxSamplesPerCycle = FragmentSize;
this->bInterleaved = true;
if (HardwareParametersSupported(Channels, Samplerate, Fragments, FragmentSize)) {
pcm_name = "hw:" + Card;
}
else {
printf("Warning: your soundcard doesn't support chosen hardware parameters; ");
printf("trying to compensate support lack with plughw...");
fflush(stdout);
pcm_name = "plughw:" + Card;
}
int err;
snd_pcm_hw_params_alloca(&hwparams); // Allocate the snd_pcm_hw_params_t structure on the stack.
/* Open PCM. The last parameter of this function is the mode. */
/* If this is set to 0, the standard mode is used. Possible */
/* other values are SND_PCM_NONBLOCK and SND_PCM_ASYNC. */
/* If SND_PCM_NONBLOCK is used, read / write access to the */
/* PCM device will return immediately. If SND_PCM_ASYNC is */
/* specified, SIGIO will be emitted whenever a period has */
/* been completely processed by the soundcard. */
if ((err = snd_pcm_open(&pcm_handle, pcm_name.c_str(), stream, 0)) < 0) {
fprintf(stderr, "Error opening PCM device %s: %s\n", pcm_name.c_str(), snd_strerror(err));
return -1;
}
if ((err = snd_pcm_hw_params_any(pcm_handle, hwparams)) < 0) {
fprintf(stderr, "Error, cannot initialize hardware parameter structure: %s.\n", snd_strerror(err));
return -1;
}
/* Set access type. This can be either */
/* SND_PCM_ACCESS_RW_INTERLEAVED or */
/* SND_PCM_ACCESS_RW_NONINTERLEAVED. */
if ((err = snd_pcm_hw_params_set_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) {
fprintf(stderr, "Error snd_pcm_hw_params_set_access: %s.\n", snd_strerror(err));
return -1;
}
/* Set sample format */
#if WORDS_BIGENDIAN
if ((err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_BE)) < 0) {
#else // little endian
if ((err = snd_pcm_hw_params_set_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_LE)) < 0) {
#endif
fprintf(stderr, "Error setting sample format. : %s\n", snd_strerror(err));
return -1;
}
int dir = 0;
/* Set sample rate. If the exact rate is not supported */
/* by the hardware, use nearest possible rate. */
#if ALSA_MAJOR > 0
if((err = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, &Samplerate, &dir)) < 0) {
#else
if((err = snd_pcm_hw_params_set_rate_near(pcm_handle, hwparams, Samplerate, &dir)) < 0) {
#endif
fprintf(stderr, "Error setting sample rate. : %s\n", snd_strerror(err));
return -1;
}
if ((err = snd_pcm_hw_params_set_channels(pcm_handle, hwparams, Channels)) < 0) {
fprintf(stderr, "Error setting number of channels. : %s\n", snd_strerror(err));
return -1;
}
/* Set number of periods. Periods used to be called fragments. */
if ((err = snd_pcm_hw_params_set_periods(pcm_handle, hwparams, Fragments, dir)) < 0) {
fprintf(stderr, "Error setting number of periods. : %s\n", snd_strerror(err));
return -1;
}
/* Set buffer size (in frames). The resulting latency is given by */
/* latency = periodsize * periods / (rate * bytes_per_frame) */
if ((err = snd_pcm_hw_params_set_buffer_size(pcm_handle, hwparams, (FragmentSize * Fragments))) < 0) {
fprintf(stderr, "Error setting buffersize. : %s\n", snd_strerror(err));
return -1;
}
/* Apply HW parameter settings to */
/* PCM device and prepare device */
if ((err = snd_pcm_hw_params(pcm_handle, hwparams)) < 0) {
fprintf(stderr, "Error setting HW params. : %s\n", snd_strerror(err));
return -1;
}
if (snd_pcm_sw_params_malloc(&swparams) != 0) {
fprintf(stderr, "Error in snd_pcm_sw_params_malloc. : %s\n", snd_strerror(err));
return -1;
}
if (snd_pcm_sw_params_current(pcm_handle, swparams) != 0) {
fprintf(stderr, "Error in snd_pcm_sw_params_current. : %s\n", snd_strerror(err));
return -1;
}
if (snd_pcm_sw_params_set_stop_threshold(pcm_handle, swparams, 0xffffffff) != 0) {
fprintf(stderr, "Error in snd_pcm_sw_params_set_stop_threshold. : %s\n", snd_strerror(err));
return -1;
}
if (snd_pcm_sw_params(pcm_handle, swparams) != 0) {
fprintf(stderr, "Error in snd_pcm_sw_params. : %s\n", snd_strerror(err));
return -1;
}
if ((err = snd_pcm_prepare(pcm_handle)) < 0) {
fprintf(stderr, "Error snd_pcm_prepare : %s\n", snd_strerror(err));
return -1;
}
// allocate the audio output buffer
pOutputBuffer = new int16_t[Channels * FragmentSize];
this->bInitialized = true;
return 0;
}
/**
* Checks if sound card supports the chosen parameters.
*
* @returns true if hardware supports it
*/
bool AlsaIO::HardwareParametersSupported(uint channels, int samplerate, uint numfragments, uint fragmentsize) {
pcm_name = "hw:0,0";
if (snd_pcm_open(&pcm_handle, pcm_name.c_str(), stream, 0) < 0) return false;
snd_pcm_hw_params_alloca(&hwparams);
if (snd_pcm_hw_params_any(pcm_handle, hwparams) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_access(pcm_handle, hwparams, SND_PCM_ACCESS_RW_INTERLEAVED) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
#if WORDS_BIGENDIAN
if (snd_pcm_hw_params_test_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_BE) < 0) {
#else // little endian
if (snd_pcm_hw_params_test_format(pcm_handle, hwparams, SND_PCM_FORMAT_S16_LE) < 0) {
#endif
snd_pcm_close(pcm_handle);
return false;
}
int dir = 0;
if (snd_pcm_hw_params_test_rate(pcm_handle, hwparams, samplerate, dir) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_channels(pcm_handle, hwparams, channels) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_periods(pcm_handle, hwparams, numfragments, dir) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
if (snd_pcm_hw_params_test_buffer_size(pcm_handle, hwparams, (fragmentsize * numfragments)) < 0) {
snd_pcm_close(pcm_handle);
return false;
}
snd_pcm_close(pcm_handle);
return true;
}
void AlsaIO::Activate() {
this->StartThread();
}
int AlsaIO::Main() {
if (!pEngine) {
fprintf(stderr, "AlsaIO: No Sampler Engine assigned, exiting.\n");
exit(EXIT_FAILURE);
}
if (!bInitialized) {
fprintf(stderr, "AlsaIO: Not yet intitialized, exiting.\n");
exit(EXIT_FAILURE);
}
while (true) {
// let the engine render audio for the current audio fragment
pEngine->RenderAudio(uiMaxSamplesPerCycle);
// check clipping in the audio sum, convert to sample_type
// (from 32bit to 16bit sample) and copy to output buffer
float sample_point; uint o = 0;
for (uint s = 0; s < uiMaxSamplesPerCycle; s++) {
for (uint c = 0; c < uiChannels; c++) {
sample_point = pEngine->GetAudioSumBuffer(c)[s] * pEngine->Volume;
if (sample_point < -32768.0) sample_point = -32768.0;
if (sample_point > 32767.0) sample_point = 32767.0;
this->pOutputBuffer[o++] = (int32_t) sample_point;
}
}
// output sound
int res = Output();
if (res < 0) {
fprintf(stderr, "AlsaIO: Audio output error, exiting.\n");
exit(EXIT_FAILURE);
}
}
}
/**
* Will be called after every audio fragment cycle, to output the audio data
* of the current fragment to the soundcard.
*
* @returns 0 on success
*/
int AlsaIO::Output() {
int err = snd_pcm_writei(pcm_handle, pOutputBuffer, uiMaxSamplesPerCycle);
if (err < 0) {
fprintf(stderr, "Error snd_pcm_writei failed. : %s\n", snd_strerror(err));
return -1;
}
return 0;
}
void AlsaIO::Close() {
if (bInitialized) {
//dmsg(0,("Stopping Alsa Thread..."));
//StopThread(); //FIXME: commented out due to a bug in thread.cpp (StopThread() doesn't return at all)
//dmsg(0,("OK\n"));
if (pcm_handle) {
//FIXME: currently commented out due to segfault
//snd_pcm_close(pcm_handle);
pcm_handle = NULL;
}
if (pOutputBuffer) {
//FIXME: currently commented out due to segfault
//delete[] pOutputBuffer;
pOutputBuffer = NULL;
}
bInitialized = false;
}
}
void* AlsaIO::GetInterleavedOutputBuffer() {
return pOutputBuffer;
}
void* AlsaIO::GetChannelOutputBufer(uint Channel) {
fprintf(stderr, "AlsaIO::GetChannelOutputBufer(): Only interleaved access allowed so far, exiting.\n");
exit(EXIT_FAILURE);
// just to avoid compiler warnings
return NULL;
}
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);
}
}
bool AlsaBackend::ProbeParameters(DeviceInfo* device, StreamSpec& spec, snd_pcm_t* phandle, snd_pcm_stream_t stream, snd_pcm_info_t *pcminfo, char *name, snd_pcm_hw_params_t *params)
{
// At this point, we just need to figure out the supported data
// formats and sample rates. We'll proceed by opening the device in
// the direction with the maximum number of channels, or playback if
// they are equal. This might limit our sample rate options, but so
// be it.
int result;
// FIXME: specify the direction in options beforehand?
if (device->outMaxChannels >= device->inMaxChannels)
stream = SND_PCM_STREAM_PLAYBACK;
else
stream = SND_PCM_STREAM_CAPTURE;
snd_pcm_info_set_stream(pcminfo, stream);
result = snd_pcm_open(&phandle, device->guid, stream, SND_PCM_ASYNC | SND_PCM_NONBLOCK);
if (result < 0) {
Log("snd_pcm_open error for device %s: %s", name, snd_strerror(result));
Log("ProbeParameters failed!");
return false;
}
// The device is open ... fill the parameter structure.
result = snd_pcm_hw_params_any(phandle, params);
if (result < 0) {
snd_pcm_close(phandle);
Log("snd_pcm_hw_params error for device %s: %s", name, snd_strerror(result));
Log("ProbeParameters failed!");
return false;
}
// Test if exact required rate is supported.
if (snd_pcm_hw_params_test_rate(phandle, params, spec.rate, 0) == 0)
{
Log("Matching rate %d found", spec.rate);
}
else
{
// try to set rate near the requested one
//.....
Log("Matching rate NOT found.");
unsigned int exactRate = spec.rate;
result = snd_pcm_hw_params_set_rate_near(phandle, params, &exactRate, 0);
if (result < 0) {
snd_pcm_close(phandle);
Log("no supported sample rates found for device %s: %s", name, snd_strerror(result));
Log("ProbeParameters failed!");
return false;
}
if (spec.rate != exactRate) {
Log("The rate %d Hz is not supported by your hardware. Using %d Hz instead.", spec.rate, exactRate);
spec.rate = exactRate;
}
}
// Probe the supported data formats ... we don't care about endian-ness just yet
// Check the requested format first and be happy if it works.
snd_pcm_format_t format;
device->supportedFormats = 0;
format = FormatToAlsa(spec.format);
if (snd_pcm_hw_params_test_format(phandle, params, format) == 0)
{
device->supportedFormats |= spec.format;
snd_pcm_close(phandle);
device->probed = true;
return true;
}
// Check that we have at least one supported format
if (device->supportedFormats == 0) {
Log("pcm device %s data format is not supported, cannot open", name);
Log("ProbeParameters failed!");
return false;
}
// That's all ... close the device and return
snd_pcm_close(phandle);
device->probed = true;
return true;
}
