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; }