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Differential D1358 Diff 4419 extern/audaspace/plugins/jack/JackDevice.cpp

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extern/audaspace/plugins/jack/JackDevice.cpp

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/*******************************************************************************
* Copyright 2009-2015 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#include "JackDevice.h"
#include "devices/DeviceManager.h"
#include "devices/IDeviceFactory.h"
#include "Exception.h"
#include "IReader.h"
#include <cstring>
#include <algorithm>
AUD_NAMESPACE_BEGIN
void JackDevice::updateRingBuffers()
{
size_t size, temp;
unsigned int samplesize = AUD_SAMPLE_SIZE(m_specs);
unsigned int i, j;
unsigned int channels = m_specs.channels;
sample_t* buffer = m_buffer.getBuffer();
float* deinterleave = m_deinterleavebuf.getBuffer();
jack_transport_state_t state;
jack_position_t position;
std::unique_lock<std::mutex> lock(m_mixingLock);
while(m_valid)
{
if(m_sync > 1)
{
if(m_syncFunc)
{
state = jack_transport_query(m_client, &position);
m_syncFunc(m_syncFuncData, state != JackTransportStopped, position.frame / (float) m_specs.rate);
}
for(i = 0; i < channels; i++)
jack_ringbuffer_reset(m_ringbuffers[i]);
}
size = jack_ringbuffer_write_space(m_ringbuffers[0]);
for(i = 1; i < channels; i++)
if((temp = jack_ringbuffer_write_space(m_ringbuffers[i])) < size)
size = temp;
while(size > samplesize)
{
size /= samplesize;
mix((data_t*)buffer, size);
for(i = 0; i < channels; i++)
{
for(j = 0; j < size; j++)
deinterleave[i * size + j] = buffer[i + j * channels];
jack_ringbuffer_write(m_ringbuffers[i], (char*)(deinterleave + i * size), size * sizeof(float));
}
size = jack_ringbuffer_write_space(m_ringbuffers[0]);
for(i = 1; i < channels; i++)
if((temp = jack_ringbuffer_write_space(m_ringbuffers[i])) < size)
size = temp;
}
if(m_sync > 1)
{
m_sync = 3;
}
m_mixingCondition.wait(lock);
}
}
int JackDevice::jack_mix(jack_nframes_t length, void* data)
{
JackDevice* device = (JackDevice*)data;
unsigned int i;
int count = device->m_specs.channels;
char* buffer;
if(device->m_sync)
{
// play silence while syncing
for(unsigned int i = 0; i < count; i++)
std::memset(jack_port_get_buffer(device->m_ports[i], length), 0, length * sizeof(float));
}
else
{
size_t temp;
size_t readsamples = jack_ringbuffer_read_space(device->m_ringbuffers[0]);
for(i = 1; i < count; i++)
if((temp = jack_ringbuffer_read_space(device->m_ringbuffers[i])) < readsamples)
readsamples = temp;
readsamples = std::min(readsamples / sizeof(float), size_t(length));
for(unsigned int i = 0; i < count; i++)
{
buffer = (char*)jack_port_get_buffer(device->m_ports[i], length);
jack_ringbuffer_read(device->m_ringbuffers[i], buffer, readsamples * sizeof(float));
if(readsamples < length)
std::memset(buffer + readsamples * sizeof(float), 0, (length - readsamples) * sizeof(float));
}
if(device->m_mixingLock.try_lock())
{
device->m_mixingCondition.notify_all();
device->m_mixingLock.unlock();
}
}
return 0;
}
int JackDevice::jack_sync(jack_transport_state_t state, jack_position_t* pos, void* data)
{
JackDevice* device = (JackDevice*)data;
if(state == JackTransportStopped)
return 1;
if(device->m_mixingLock.try_lock())
{
if(device->m_sync > 2)
{
if(device->m_sync == 3)
{
device->m_sync = 0;
device->m_mixingLock.unlock();
return 1;
}
}
else
{
device->m_sync = 2;
device->m_mixingCondition.notify_all();
}
device->m_mixingLock.unlock();
}
else if(!device->m_sync)
device->m_sync = 1;
return 0;
}
void JackDevice::jack_shutdown(void* data)
{
JackDevice* device = (JackDevice*)data;
device->m_valid = false;
}
JackDevice::JackDevice(std::string name, DeviceSpecs specs, int buffersize) :
m_synchronizer(this)
{
if(specs.channels == CHANNELS_INVALID)
specs.channels = CHANNELS_STEREO;
// jack uses floats
m_specs = specs;
m_specs.format = FORMAT_FLOAT32;
jack_options_t options = JackNullOption;
jack_status_t status;
// open client
m_client = jack_client_open(name.c_str(), options, &status);
if(m_client == nullptr)
AUD_THROW(DeviceException, "Connecting to the Jack server failed.");
// set callbacks
jack_set_process_callback(m_client, JackDevice::jack_mix, this);
jack_on_shutdown(m_client, JackDevice::jack_shutdown, this);
jack_set_sync_callback(m_client, JackDevice::jack_sync, this);
// register our output channels which are called ports in jack
m_ports = new jack_port_t*[m_specs.channels];
try
{
char portname[64];
for(int i = 0; i < m_specs.channels; i++)
{
sprintf(portname, "out %d", i+1);
m_ports[i] = jack_port_register(m_client, portname, JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0);
if(m_ports[i] == nullptr)
AUD_THROW(DeviceException, "Registering output port with Jack failed.");
}
}
catch(Exception&)
{
jack_client_close(m_client);
delete[] m_ports;
throw;
}
m_specs.rate = (SampleRate)jack_get_sample_rate(m_client);
buffersize *= sizeof(sample_t);
m_ringbuffers = new jack_ringbuffer_t*[specs.channels];
for(unsigned int i = 0; i < specs.channels; i++)
m_ringbuffers[i] = jack_ringbuffer_create(buffersize);
buffersize *= specs.channels;
m_deinterleavebuf.resize(buffersize);
m_buffer.resize(buffersize);
create();
m_valid = true;
m_sync = 0;
m_syncFunc = nullptr;
m_nextState = m_state = jack_transport_query(m_client, nullptr);
// activate the client
if(jack_activate(m_client))
{
jack_client_close(m_client);
delete[] m_ports;
for(unsigned int i = 0; i < specs.channels; i++)
jack_ringbuffer_free(m_ringbuffers[i]);
delete[] m_ringbuffers;
destroy();
AUD_THROW(DeviceException, "Client activation with Jack failed.");
}
const char** ports = jack_get_ports(m_client, nullptr, nullptr,
JackPortIsPhysical | JackPortIsInput);
if(ports != nullptr)
{
for(int i = 0; i < m_specs.channels && ports[i]; i++)
jack_connect(m_client, jack_port_name(m_ports[i]), ports[i]);
jack_free(ports);
}
m_mixingThread = std::thread(&JackDevice::updateRingBuffers, this);
}
JackDevice::~JackDevice()
{
if(m_valid)
jack_client_close(m_client);
m_valid = false;
delete[] m_ports;
m_mixingLock.lock();
m_mixingCondition.notify_all();
m_mixingLock.unlock();
m_mixingThread.join();
for(unsigned int i = 0; i < m_specs.channels; i++)
jack_ringbuffer_free(m_ringbuffers[i]);
delete[] m_ringbuffers;
destroy();
}
ISynchronizer* JackDevice::getSynchronizer()
{
return &m_synchronizer;
}
void JackDevice::playing(bool playing)
{
// Do nothing.
}
void JackDevice::startPlayback()
{
jack_transport_start(m_client);
m_nextState = JackTransportRolling;
}
void JackDevice::stopPlayback()
{
jack_transport_stop(m_client);
m_nextState = JackTransportStopped;
}
void JackDevice::seekPlayback(float time)
{
if(time >= 0.0f)
jack_transport_locate(m_client, time * m_specs.rate);
}
void JackDevice::setSyncCallback(ISynchronizer::syncFunction sync, void* data)
{
m_syncFunc = sync;
m_syncFuncData = data;
}
float JackDevice::getPlaybackPosition()
{
jack_position_t position;
jack_transport_query(m_client, &position);
return position.frame / (float) m_specs.rate;
}
bool JackDevice::doesPlayback()
{
jack_transport_state_t state = jack_transport_query(m_client, nullptr);
if(state != m_state)
m_nextState = m_state = state;
return m_nextState != JackTransportStopped;
}
class JackDeviceFactory : public IDeviceFactory
{
private:
DeviceSpecs m_specs;
int m_buffersize;
std::string m_name;
public:
JackDeviceFactory() :
m_buffersize(AUD_DEFAULT_BUFFER_SIZE),
m_name("Audaspace")
{
m_specs.format = FORMAT_FLOAT32;
m_specs.channels = CHANNELS_STEREO;
m_specs.rate = RATE_48000;
}
virtual std::shared_ptr<IDevice> openDevice()
{
return std::shared_ptr<IDevice>(new JackDevice(m_name, m_specs, m_buffersize));
}
virtual int getPriority()
{
return 0;
}
virtual void setSpecs(DeviceSpecs specs)
{
m_specs = specs;
}
virtual void setBufferSize(int buffersize)
{
m_buffersize = buffersize;
}
virtual void setName(std::string name)
{
m_name = name;
}
};
void JackDevice::registerPlugin()
{
DeviceManager::registerDevice("Jack", std::shared_ptr<IDeviceFactory>(new JackDeviceFactory));
}
#ifdef JACK_PLUGIN
extern "C" AUD_PLUGIN_API void registerPlugin()
{
JackDevice::registerPlugin();
}
extern "C" AUD_PLUGIN_API const char* getName()
{
return "Jack";
}
#endif
AUD_NAMESPACE_END