static std::string s_instance_name;
size_t AlsaAudioBackend::_max_buffer_size = 8192;
std::vector<std::string> AlsaAudioBackend::_midi_options;
-std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_audio_device_status;
+std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_input_audio_device_status;
+std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_output_audio_device_status;
+std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_duplex_audio_device_status;
std::vector<AudioBackend::DeviceStatus> AlsaAudioBackend::_midi_device_status;
+ALSADeviceInfo AlsaAudioBackend::_input_audio_device_info;
+ALSADeviceInfo AlsaAudioBackend::_output_audio_device_info;
+
AlsaAudioBackend::AlsaAudioBackend (AudioEngine& e, AudioBackendInfo& info)
: AudioBackend (e, info)
, _pcmi (0)
, _run (false)
, _active (false)
+ , _freewheel (false)
, _freewheeling (false)
, _measure_latency (false)
- , _audio_device("")
- , _midi_driver_option(_("None"))
+ , _last_process_start (0)
+ , _input_audio_device("")
+ , _output_audio_device("")
+ , _midi_driver_option(get_standard_device_name(DeviceNone))
, _device_reservation(0)
, _samplerate (48000)
, _samples_per_period (1024)
{
_instance_name = s_instance_name;
pthread_mutex_init (&_port_callback_mutex, 0);
+ _input_audio_device_info.valid = false;
+ _output_audio_device_info.valid = false;
}
AlsaAudioBackend::~AlsaAudioBackend ()
std::vector<AudioBackend::DeviceStatus>
AlsaAudioBackend::enumerate_devices () const
{
- _audio_device_status.clear();
+ _duplex_audio_device_status.clear();
std::map<std::string, std::string> devices;
get_alsa_audio_device_names(devices);
for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
- if (_audio_device == "") _audio_device = i->first;
- _audio_device_status.push_back (DeviceStatus (i->first, true));
+ if (_input_audio_device == "") _input_audio_device = i->first;
+ if (_output_audio_device == "") _output_audio_device = i->first;
+ _duplex_audio_device_status.push_back (DeviceStatus (i->first, true));
}
- return _audio_device_status;
+ return _duplex_audio_device_status;
+}
+
+std::vector<AudioBackend::DeviceStatus>
+AlsaAudioBackend::enumerate_input_devices () const
+{
+ _input_audio_device_status.clear();
+ std::map<std::string, std::string> devices;
+ get_alsa_audio_device_names(devices, HalfDuplexIn);
+ _input_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
+ for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
+ if (_input_audio_device == "") _input_audio_device = i->first;
+ _input_audio_device_status.push_back (DeviceStatus (i->first, true));
+ }
+ return _input_audio_device_status;
+}
+
+std::vector<AudioBackend::DeviceStatus>
+AlsaAudioBackend::enumerate_output_devices () const
+{
+ _output_audio_device_status.clear();
+ std::map<std::string, std::string> devices;
+ get_alsa_audio_device_names(devices, HalfDuplexOut);
+ _output_audio_device_status.push_back (DeviceStatus (get_standard_device_name(DeviceNone), true));
+ for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
+ if (_output_audio_device == "") _output_audio_device = i->first;
+ _output_audio_device_status.push_back (DeviceStatus (i->first, true));
+ }
+ return _output_audio_device_status;
}
void
}
std::vector<float>
-AlsaAudioBackend::available_sample_rates (const std::string&) const
+AlsaAudioBackend::available_sample_rates2 (const std::string& input_device, const std::string& output_device) const
{
std::vector<float> sr;
- sr.push_back (8000.0);
- sr.push_back (22050.0);
- sr.push_back (24000.0);
- sr.push_back (44100.0);
- sr.push_back (48000.0);
- sr.push_back (88200.0);
- sr.push_back (96000.0);
- sr.push_back (176400.0);
- sr.push_back (192000.0);
+ if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
+ return sr;
+ }
+ else if (input_device == get_standard_device_name(DeviceNone)) {
+ sr = available_sample_rates (output_device);
+ }
+ else if (output_device == get_standard_device_name(DeviceNone)) {
+ sr = available_sample_rates (input_device);
+ } else {
+ std::vector<float> sr_in = available_sample_rates (input_device);
+ std::vector<float> sr_out = available_sample_rates (output_device);
+ std::set_intersection (sr_in.begin(), sr_in.end(), sr_out.begin(), sr_out.end(), std::back_inserter(sr));
+ }
+ return sr;
+}
+
+std::vector<float>
+AlsaAudioBackend::available_sample_rates (const std::string& device) const
+{
+ ALSADeviceInfo *nfo = NULL;
+ std::vector<float> sr;
+ if (device == get_standard_device_name(DeviceNone)) {
+ return sr;
+ }
+ if (device == _input_audio_device && _input_audio_device_info.valid) {
+ nfo = &_input_audio_device_info;
+ }
+ else if (device == _output_audio_device && _output_audio_device_info.valid) {
+ nfo = &_output_audio_device_info;
+ }
+
+ static const float avail_rates [] = { 8000, 22050.0, 24000.0, 44100.0, 48000.0, 88200.0, 96000.0, 176400.0, 192000.0 };
+
+ for (size_t i = 0 ; i < sizeof(avail_rates) / sizeof(float); ++i) {
+ if (!nfo || (avail_rates[i] >= nfo->min_rate && avail_rates[i] <= nfo->max_rate)) {
+ sr.push_back (avail_rates[i]);
+ }
+ }
+
return sr;
}
std::vector<uint32_t>
-AlsaAudioBackend::available_buffer_sizes (const std::string&) const
+AlsaAudioBackend::available_buffer_sizes2 (const std::string& input_device, const std::string& output_device) const
{
std::vector<uint32_t> bs;
- bs.push_back (32);
- bs.push_back (64);
- bs.push_back (128);
- bs.push_back (256);
- bs.push_back (512);
- bs.push_back (1024);
- bs.push_back (2048);
- bs.push_back (4096);
- bs.push_back (8192);
+ if (input_device == get_standard_device_name(DeviceNone) && output_device == get_standard_device_name(DeviceNone)) {
+ return bs;
+ }
+ else if (input_device == get_standard_device_name(DeviceNone)) {
+ bs = available_buffer_sizes (output_device);
+ }
+ else if (output_device == get_standard_device_name(DeviceNone)) {
+ bs = available_buffer_sizes (input_device);
+ } else {
+ std::vector<uint32_t> bs_in = available_buffer_sizes (input_device);
+ std::vector<uint32_t> bs_out = available_buffer_sizes (output_device);
+ std::set_intersection (bs_in.begin(), bs_in.end(), bs_out.begin(), bs_out.end(), std::back_inserter(bs));
+ }
+ return bs;
+}
+
+std::vector<uint32_t>
+AlsaAudioBackend::available_buffer_sizes (const std::string& device) const
+{
+ ALSADeviceInfo *nfo = NULL;
+ std::vector<uint32_t> bs;
+ if (device == get_standard_device_name(DeviceNone)) {
+ return bs;
+ }
+ if (device == _input_audio_device && _input_audio_device_info.valid) {
+ nfo = &_input_audio_device_info;
+ }
+ else if (device == _output_audio_device && _output_audio_device_info.valid) {
+ nfo = &_output_audio_device_info;
+ }
+
+ static const unsigned long avail_sizes [] = { 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192 };
+
+ for (size_t i = 0 ; i < sizeof(avail_sizes) / sizeof(unsigned long); ++i) {
+ if (!nfo || (avail_sizes[i] >= nfo->min_size && avail_sizes[i] <= nfo->max_size)) {
+ bs.push_back (avail_sizes[i]);
+ }
+ }
return bs;
}
uint32_t
-AlsaAudioBackend::available_input_channel_count (const std::string&) const
+AlsaAudioBackend::available_input_channel_count (const std::string& device) const
{
- return 128; // TODO query current device
+ if (device == get_standard_device_name(DeviceNone)) {
+ return 0;
+ }
+ if (device == _input_audio_device && _input_audio_device_info.valid) {
+ return _input_audio_device_info.max_channels;
+ }
+ return 128;
}
uint32_t
-AlsaAudioBackend::available_output_channel_count (const std::string&) const
+AlsaAudioBackend::available_output_channel_count (const std::string& device) const
{
- return 128; // TODO query current device
+ if (device == get_standard_device_name(DeviceNone)) {
+ return 0;
+ }
+ if (device == _output_audio_device && _output_audio_device_info.valid) {
+ return _output_audio_device_info.max_channels;
+ }
+ return 128;
}
bool
bool
AlsaAudioBackend::can_change_buffer_size_when_running () const
{
- return false;
+ return false; // why not? :)
}
int
-AlsaAudioBackend::set_device_name (const std::string& d)
+AlsaAudioBackend::set_input_device_name (const std::string& d)
{
- _audio_device = d;
+ if (_input_audio_device == d) {
+ return 0;
+ }
+ _input_audio_device = d;
+
+ if (d == get_standard_device_name(DeviceNone)) {
+ _input_audio_device_info.valid = false;
+ return 0;
+ }
+ std::string alsa_device;
+ std::map<std::string, std::string> devices;
+
+ get_alsa_audio_device_names(devices, HalfDuplexIn);
+ for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
+ if (i->first == d) {
+ alsa_device = i->second;
+ break;
+ }
+ }
+ if (alsa_device == "") {
+ _input_audio_device_info.valid = false;
+ return 1;
+ }
+ /* device will be busy once used, hence cache the parameters */
+ /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_input_audio_device_info);
return 0;
}
+int
+AlsaAudioBackend::set_output_device_name (const std::string& d)
+{
+ if (_output_audio_device == d) {
+ return 0;
+ }
+
+ _output_audio_device = d;
+
+ if (d == get_standard_device_name(DeviceNone)) {
+ _output_audio_device_info.valid = false;
+ return 0;
+ }
+ std::string alsa_device;
+ std::map<std::string, std::string> devices;
+
+ get_alsa_audio_device_names(devices, HalfDuplexOut);
+ for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
+ if (i->first == d) {
+ alsa_device = i->second;
+ break;
+ }
+ }
+ if (alsa_device == "") {
+ _output_audio_device_info.valid = false;
+ return 1;
+ }
+ /* return */ get_alsa_device_parameters (alsa_device.c_str(), true, &_output_audio_device_info);
+ return 0;
+}
+
+int
+AlsaAudioBackend::set_device_name (const std::string& d)
+{
+ int rv = 0;
+ rv |= set_input_device_name (d);
+ rv |= set_output_device_name (d);
+ return rv;
+}
+
int
AlsaAudioBackend::set_sample_rate (float sr)
{
if (bs <= 0 || bs >= _max_buffer_size) {
return -1;
}
+ if (_run) {
+ return -1;
+ }
_samples_per_period = bs;
engine.buffer_size_change (bs);
return 0;
std::string
AlsaAudioBackend::device_name () const
{
- return _audio_device;
+ if (_input_audio_device != get_standard_device_name(DeviceNone)) {
+ return _input_audio_device;
+ }
+ if (_output_audio_device != get_standard_device_name(DeviceNone)) {
+ return _output_audio_device;
+ }
+ return "";
+}
+
+std::string
+AlsaAudioBackend::input_device_name () const
+{
+ return _input_audio_device;
+}
+
+std::string
+AlsaAudioBackend::output_device_name () const
+{
+ return _output_audio_device;
}
float
}
}
- assert(_midi_driver_option != _("None"));
+ assert(_midi_driver_option != get_standard_device_name(DeviceNone));
std::map<std::string, std::string> devices;
if (_midi_driver_option == _("ALSA raw devices")) {
AlsaAudioBackend::enumerate_midi_options () const
{
if (_midi_options.empty()) {
- _midi_options.push_back (_("None"));
_midi_options.push_back (_("ALSA raw devices"));
_midi_options.push_back (_("ALSA sequencer"));
+ _midi_options.push_back (get_standard_device_name(DeviceNone));
}
return _midi_options;
}
int
AlsaAudioBackend::set_midi_option (const std::string& opt)
{
- if (opt != _("None") && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
+ if (opt != get_standard_device_name(DeviceNone) && opt != _("ALSA raw devices") && opt != _("ALSA sequencer")) {
return -1;
}
_midi_driver_option = opt;
_ports.clear();
}
+ /* reset internal state */
+ _dsp_load = 0;
+ _freewheeling = false;
+ _freewheel = false;
+ _last_process_start = 0;
+
release_device();
assert(_rmidi_in.size() == 0);
assert(_rmidi_out.size() == 0);
assert(_pcmi == 0);
+ int duplex = 0;
+ std::string audio_device;
std::string alsa_device;
std::map<std::string, std::string> devices;
- get_alsa_audio_device_names(devices);
+
+ if (_input_audio_device == get_standard_device_name(DeviceNone) && _output_audio_device == get_standard_device_name(DeviceNone)) {
+ PBD::error << _("AlsaAudioBackend: At least one of input or output device needs to be set.");
+ return -1;
+ }
+
+ if (_input_audio_device != _output_audio_device) {
+ if (_input_audio_device != get_standard_device_name(DeviceNone) && _output_audio_device != get_standard_device_name(DeviceNone)) {
+ PBD::error << _("AlsaAudioBackend: Cannot use two different devices.");
+ return -1;
+ }
+ if (_input_audio_device != get_standard_device_name(DeviceNone)) {
+ get_alsa_audio_device_names(devices, HalfDuplexIn);
+ audio_device = _input_audio_device;
+ duplex = 1;
+ } else {
+ get_alsa_audio_device_names(devices, HalfDuplexOut);
+ audio_device = _output_audio_device;
+ duplex = 2;
+ }
+ } else {
+ get_alsa_audio_device_names(devices);
+ audio_device = _input_audio_device;
+ duplex = 3;
+ }
+
for (std::map<std::string, std::string>::const_iterator i = devices.begin (); i != devices.end(); ++i) {
- if (i->first == _audio_device) {
+ if (i->first == audio_device) {
alsa_device = i->second;
break;
}
}
+ if (alsa_device == "") {
+ PBD::error << _("AlsaAudioBackend: Cannot find configured device. Is it still connected?");
+ return -1;
+ }
acquire_device(alsa_device.c_str());
- _pcmi = new Alsa_pcmi (alsa_device.c_str(), alsa_device.c_str(), 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
+ _pcmi = new Alsa_pcmi (
+ (duplex & 2) ? alsa_device.c_str() : NULL,
+ (duplex & 1) ? alsa_device.c_str() : NULL,
+ 0, _samplerate, _samples_per_period, _periods_per_cycle, 0);
switch (_pcmi->state ()) {
case 0: /* OK */ break;
case -1: PBD::error << _("AlsaAudioBackend: failed to open device.") << endmsg; break;
int
AlsaAudioBackend::freewheel (bool onoff)
{
- if (onoff == _freewheeling) {
- return 0;
- }
_freewheeling = onoff;
- engine.freewheel_callback (onoff);
return 0;
}
float
AlsaAudioBackend::dsp_load () const
{
- return 100.f * _dsp_load;
+ return std::min(100.f, 100.f * _dsp_load);
}
size_t
}
/* Process time */
-pframes_t
+framepos_t
AlsaAudioBackend::sample_time ()
{
return _processed_samples;
}
-pframes_t
+framepos_t
AlsaAudioBackend::sample_time_at_cycle_start ()
{
return _processed_samples;
pframes_t
AlsaAudioBackend::samples_since_cycle_start ()
{
- return 0;
+ if (!_active || !_run || _freewheeling || _freewheel) {
+ return 0;
+ }
+ if (_last_process_start == 0) {
+ return 0;
+ }
+
+ const int64_t elapsed_time_us = g_get_monotonic_time() - _last_process_start;
+ return std::max((pframes_t)0, (pframes_t)rint(1e-6 * elapsed_time_us * _samplerate));
}
}
for (size_t i = 0; i < _ports.size (); ++i) {
AlsaPort* port = _ports[i];
- if ((port->type () == type) && (port->flags () & flags)) {
+ if ((port->type () == type) && flags == (port->flags () & flags)) {
if (!use_regexp || !regexec (&port_regex, port->name ().c_str (), 0, NULL, 0)) {
port_names.push_back (port->name ());
++rv;
{
LatencyRange lr;
- const int a_ins = _n_inputs > 0 ? _n_inputs : 2;
- const int a_out = _n_outputs > 0 ? _n_outputs : 2;
+ const int a_ins = _n_inputs;
+ const int a_out = _n_outputs;
/* audio ports */
- lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : _systemic_audio_input_latency);
+ lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_input_latency);
for (int i = 1; i <= a_ins; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:capture_%d", i);
_system_inputs.push_back(static_cast<AlsaPort*>(p));
}
- lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : _systemic_audio_output_latency);
+ lr.min = lr.max = (_measure_latency ? 0 : _systemic_audio_output_latency);
for (int i = 1; i <= a_out; ++i) {
char tmp[64];
snprintf(tmp, sizeof(tmp), "system:playback_%d", i);
int midi_ins = 0;
int midi_outs = 0;
- if (_midi_driver_option == _("None")) {
+ if (_midi_driver_option == get_standard_device_name(DeviceNone)) {
return 0;
} else if (_midi_driver_option == _("ALSA raw devices")) {
get_alsa_rawmidi_device_names(devices);
delete mout;
}
LatencyRange lr;
- lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : nfo->systemic_output_latency);
+ lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_output_latency);
set_latency_range (p, false, lr);
static_cast<AlsaMidiPort*>(p)->set_n_periods(2);
_system_midi_out.push_back(static_cast<AlsaPort*>(p));
continue;
}
LatencyRange lr;
- lr.min = lr.max = _samples_per_period + (_measure_latency ? 0 : nfo->systemic_input_latency);
+ lr.min = lr.max = (_measure_latency ? 0 : nfo->systemic_input_latency);
set_latency_range (p, false, lr);
_system_midi_in.push_back(static_cast<AlsaPort*>(p));
_rmidi_in.push_back (midin);
assert (buffer && port_buffer);
AlsaMidiBuffer& dst = * static_cast<AlsaMidiBuffer*>(port_buffer);
if (dst.size () && (pframes_t)dst.back ()->timestamp () > timestamp) {
+#ifndef NDEBUG
+ // nevermind, ::get_buffer() sorts events
fprintf (stderr, "AlsaMidiBuffer: it's too late for this event. %d > %d\n",
(pframes_t)dst.back ()->timestamp (), timestamp);
- return -1;
+#endif
}
dst.push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (timestamp, buffer, size)));
return 0;
LatencyRange
AlsaAudioBackend::get_latency_range (PortEngine::PortHandle port, bool for_playback)
{
+ LatencyRange r;
if (!valid_port (port)) {
PBD::error << _("AlsaPort::get_latency_range (): invalid port.") << endmsg;
- LatencyRange r;
r.min = 0;
r.max = 0;
return r;
}
- return static_cast<AlsaPort*>(port)->latency_range (for_playback);
+ AlsaPort *p = static_cast<AlsaPort*>(port);
+ assert(p);
+
+ r = p->latency_range (for_playback);
+ if (p->is_physical() && p->is_terminal()) {
+ if (p->is_input() && for_playback) {
+ r.min += _samples_per_period;
+ r.max += _samples_per_period;
+ }
+ if (p->is_output() && !for_playback) {
+ r.min += _samples_per_period;
+ r.max += _samples_per_period;
+ }
+ }
+ return r;
}
/* Discovering physical ports */
_processed_samples = 0;
uint64_t clock1, clock2;
- clock1 = g_get_monotonic_time();
_pcmi->pcm_start ();
int no_proc_errors = 0;
const int bailout = 2 * _samplerate / _samples_per_period;
- const int64_t nomial_time = 1e6 * _samples_per_period / _samplerate;
+ const int64_t nominal_time = 1e6 * _samples_per_period / _samplerate;
manager.registration_callback();
manager.graph_order_callback();
while (_run) {
long nr;
bool xrun = false;
- if (!_freewheeling) {
+
+ if (_freewheeling != _freewheel) {
+ _freewheel = _freewheeling;
+ engine.freewheel_callback (_freewheel);
+ }
+
+ if (!_freewheel) {
nr = _pcmi->pcm_wait ();
if (_pcmi->state () > 0) {
++no_proc_errors;
xrun = true;
}
- if (_pcmi->state () < 0 || no_proc_errors > bailout) {
+ if (_pcmi->state () < 0) {
PBD::error << _("AlsaAudioBackend: I/O error. Audio Process Terminated.") << endmsg;
break;
}
- while (nr >= (long)_samples_per_period) {
+ if (no_proc_errors > bailout) {
+ PBD::error
+ << string_compose (
+ _("AlsaAudioBackend: Audio Process Terminated after %1 consecutive x-runs."),
+ no_proc_errors)
+ << endmsg;
+ break;
+ }
+
+ while (nr >= (long)_samples_per_period && _freewheeling == _freewheel) {
uint32_t i = 0;
clock1 = g_get_monotonic_time();
no_proc_errors = 0;
}
_pcmi->capt_done (_samples_per_period);
- /* de-queue midi*/
+ /* de-queue incoming midi*/
i = 0;
for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
assert (_rmidi_in.size() > i);
memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
}
+ /* call engine process callback */
+ _last_process_start = g_get_monotonic_time();
if (engine.process_callback (_samples_per_period)) {
_pcmi->pcm_stop ();
_active = false;
return 0;
}
- i = 0;
- for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
+ for (std::vector<AlsaPort*>::iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
static_cast<AlsaMidiPort*>(*it)->next_period();
}
- /* queue midi */
+ /* queue outgoing midi */
i = 0;
for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it, ++i) {
assert (_rmidi_out.size() > i);
- const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
+ const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*it)->const_buffer();
AlsaMidiOut *rm = _rmidi_out.at(i);
rm->sync_time (clock1);
- for (AlsaMidiBuffer::const_iterator mit = src.begin (); mit != src.end (); ++mit) {
+ for (AlsaMidiBuffer::const_iterator mit = src->begin (); mit != src->end (); ++mit) {
rm->send_event ((*mit)->timestamp(), (*mit)->data(), (*mit)->size());
}
}
/* calculate DSP load */
clock2 = g_get_monotonic_time();
const int64_t elapsed_time = clock2 - clock1;
- _dsp_load = elapsed_time / (float) nomial_time;
+ // low pass filter
+ const float load = elapsed_time / (float) nominal_time;
+ if (load > _dsp_load) {
+ _dsp_load = load;
+ } else {
+ const float a = .2 * _samples_per_period / _samplerate;
+ _dsp_load = _dsp_load + a * (load - _dsp_load) + 1e-12;
+ }
}
if (xrun && (_pcmi->capt_xrun() > 0 || _pcmi->play_xrun() > 0)) {
engine.Xrun ();
#if 0
- fprintf(stderr, "ALSA x-run read: %.1f ms, write: %.1f ms\n",
+ fprintf(stderr, "ALSA x-run read: %.2f ms, write: %.2f ms\n",
_pcmi->capt_xrun() * 1000.0, _pcmi->play_xrun() * 1000.0);
#endif
}
} else {
// Freewheelin'
+
+ // zero audio input buffers
for (std::vector<AlsaPort*>::const_iterator it = _system_inputs.begin (); it != _system_inputs.end (); ++it) {
memset ((*it)->get_buffer (_samples_per_period), 0, _samples_per_period * sizeof (Sample));
}
- for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it) {
+
+ clock1 = g_get_monotonic_time();
+ uint32_t i = 0;
+ for (std::vector<AlsaPort*>::const_iterator it = _system_midi_in.begin (); it != _system_midi_in.end (); ++it, ++i) {
static_cast<AlsaMidiBuffer*>((*it)->get_buffer(0))->clear ();
+ AlsaMidiIn *rm = _rmidi_in.at(i);
+ void *bptr = (*it)->get_buffer(0);
+ midi_clear(bptr); // zero midi buffer
+
+ // TODO add an API call for this.
+ pframes_t time;
+ uint8_t data[64]; // match MaxAlsaEventSize in alsa_rawmidi.cc
+ size_t size = sizeof(data);
+ while (rm->recv_event (time, data, size)) {
+ ; // discard midi-data from HW.
+ }
+ rm->sync_time (clock1);
}
+ _last_process_start = 0;
if (engine.process_callback (_samples_per_period)) {
_pcmi->pcm_stop ();
+ _active = false;
return 0;
}
+
+ // drop all outgoing MIDI messages
+ for (std::vector<AlsaPort*>::const_iterator it = _system_midi_out.begin (); it != _system_midi_out.end (); ++it) {
+ void *bptr = (*it)->get_buffer(0);
+ midi_clear(bptr);
+ }
+
_dsp_load = 1.0;
Glib::usleep (100); // don't hog cpu
}
for (std::vector<AlsaPort*>::const_iterator i = get_connections ().begin ();
i != get_connections ().end ();
++i) {
- const AlsaMidiBuffer src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
- for (AlsaMidiBuffer::const_iterator it = src.begin (); it != src.end (); ++it) {
+ const AlsaMidiBuffer * src = static_cast<const AlsaMidiPort*>(*i)->const_buffer ();
+ for (AlsaMidiBuffer::const_iterator it = src->begin (); it != src->end (); ++it) {
(_buffer[_bufperiod]).push_back (boost::shared_ptr<AlsaMidiEvent>(new AlsaMidiEvent (**it)));
}
}
projects / ardour.git / blobdiff