Add Chromium-only Blender WebEngine parity work

blender-5.2.0/extern/audaspace/plugins/jack/JackDevice.cpp

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+/*******************************************************************************
+ * Copyright 2009-2016 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 "JackLibrary.h"
+#include "devices/DeviceManager.h"
+#include "devices/IDeviceFactory.h"
+#include "Exception.h"
+
+#include <cstring>
+#include <algorithm>
+
+AUD_NAMESPACE_BEGIN
+
+int JackDevice::jack_mix(jack_nframes_t length, void* data)
+{
+	JackDevice* device = (JackDevice*) data;
+	int count = device->m_specs.channels;
+	float* buffer;
+
+	jack_position_t position;
+	jack_transport_state_t state = AUD_jack_transport_query(device->m_client, &position);
+
+	if(state == JackTransportStarting)
+	{
+		// play silence while syncing
+		for(int i = 0; i < count; i++)
+			std::memset(AUD_jack_port_get_buffer(device->m_ports[i], length), 0, length * sizeof(float));
+	}
+	else
+	{
+		// ensure that if two consecutive seeks to exactly the same position result in a sync callback call in jack_sync
+		if((state == JackTransportRolling) && (device->m_lastMixState != JackTransportRolling))
+			++device->m_rollingSyncRevision;
+
+		size_t sample_size = AUD_DEVICE_SAMPLE_SIZE(device->m_specs);
+
+		size_t readsamples = device->getRingBuffer().getReadSize();
+
+		readsamples = std::min(readsamples / sample_size, static_cast<size_t>(length));
+
+		data_t* deinterleave_buffer = reinterpret_cast<data_t*>(device->m_deinterleavebuf.getBuffer());
+
+		device->getRingBuffer().read(deinterleave_buffer, readsamples * sample_size);
+
+		if(readsamples < length)
+			std::memset(deinterleave_buffer + readsamples * sample_size, 0, (length - readsamples) * sample_size);
+
+		for(int i = 0; i < count; i++)
+		{
+			buffer = reinterpret_cast<float*>(AUD_jack_port_get_buffer(device->m_ports[i], length));
+
+			for(int j = 0; j < length; j++)
+				buffer[j] = reinterpret_cast<float*>(deinterleave_buffer)[i + j * count];
+		}
+
+		// if we are stopped and the jack transport position changes, we need to notify the mixing thread to call the sync callback
+		if(state == JackTransportStopped)
+		{
+			float syncTime = position.frame / (float) position.frame_rate;
+
+			if(syncTime != device->m_syncTime)
+			{
+				device->m_syncTime = syncTime;
+				++device->m_syncCallRevision;
+			}
+		}
+
+		device->notifyMixingThread();
+	}
+
+	device->m_lastMixState = state;
+
+	return 0;
+}
+
+int JackDevice::jack_sync(jack_transport_state_t state, jack_position_t* pos, void* data)
+{
+	JackDevice* device = (JackDevice*)data;
+
+	// we return immediately when the state is stopped as this is handled in the mixing thread separately, as not all stops result in a call here from jack.
+	if(state == JackTransportStopped)
+		return 1;
+
+	float syncTime = pos->frame / (float) pos->frame_rate;
+
+	// We need to call the sync callback in the mixing thread if
+	// - the sync time is different, i.e., a new sync to a different time is done
+	// - if the last state is stopped, i.e., we are starting playback
+	// - if the sync time is the same but the rolling revision is increased, i.e., we are syncing repeatedly to the same time (happens especially when jumping back to the start)
+	if((syncTime != device->m_syncTime) || (device->m_lastMixState == JackTransportStopped) || (device->m_rollingSyncRevision != device->m_lastRollingSyncRevision))
+	{
+		device->m_syncTime = syncTime;
+		++device->m_syncCallRevision;
+		device->notifyMixingThread();
+		device->m_lastRollingSyncRevision = device->m_rollingSyncRevision;
+		return 0;
+	}
+
+	return device->m_syncCallRevision == device->m_lastSyncCallRevision;
+}
+
+void JackDevice::preMixingWork([[maybe_unused]] bool playing)
+{
+	jack_transport_state_t state;
+	jack_position_t position;
+
+	state = AUD_jack_transport_query(m_client, &position);
+
+	// we sync either when:
+	// - there was a jack sync callback that requests a playing sync (either start playback or seek during playback) - caused by a m_syncCallRevision change in jack_sync
+	// - the jack transport state changed to stop from not stopped (i.e. external stopping) - checked here
+	// - the sync time changes when seeking during the stopped state - caused by a m_syncCallRevision change in jack_mix
+	if((m_syncCallRevision != m_lastSyncCallRevision) || (state == JackTransportStopped && m_lastState != JackTransportStopped))
+	{
+		int syncRevision = m_syncCallRevision;
+		float syncTime = m_syncTime;
+
+		if(m_syncFunc)
+			m_syncFunc(m_syncFuncData, state != JackTransportStopped, syncTime);
+
+		// we reset the ring buffer when we sync to start from the correct position
+		getRingBuffer().reset();
+
+		m_lastSyncCallRevision = syncRevision;
+	}
+
+	m_lastState = state;
+}
+
+void JackDevice::jack_shutdown(void* data)
+{
+	JackDevice* device = (JackDevice*)data;
+	device->stopMixingThread();
+}
+
+JackDevice::JackDevice(const std::string& name, DeviceSpecs specs, int buffersize)
+{
+	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 = AUD_jack_client_open(name.c_str(), options, &status);
+	if(m_client == nullptr)
+		AUD_THROW(DeviceException, "Connecting to the JACK server failed.");
+
+	// set callbacks
+	AUD_jack_set_process_callback(m_client, JackDevice::jack_mix, this);
+	AUD_jack_on_shutdown(m_client, JackDevice::jack_shutdown, this);
+	AUD_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] = AUD_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&)
+	{
+		AUD_jack_client_close(m_client);
+		delete[] m_ports;
+		throw;
+	}
+
+	m_specs.rate = (SampleRate)AUD_jack_get_sample_rate(m_client);
+
+	if(buffersize < 0)
+		buffersize = AUD_jack_get_buffer_size(m_client) * 2;
+
+	buffersize *= AUD_SAMPLE_SIZE(m_specs);
+	m_deinterleavebuf.resize(buffersize);
+
+	create();
+
+	m_lastState = JackTransportStopped;
+	m_lastMixState = JackTransportStopped;
+	m_syncFunc = nullptr;
+	m_syncTime = 0;
+	m_syncCallRevision = 0;
+	m_lastSyncCallRevision = 0;
+	m_rollingSyncRevision = 0;
+	m_lastRollingSyncRevision = 0;
+
+	// activate the client
+	if(AUD_jack_activate(m_client))
+	{
+		AUD_jack_client_close(m_client);
+		delete[] m_ports;
+		destroy();
+
+		AUD_THROW(DeviceException, "Client activation with JACK failed.");
+	}
+
+	const char** ports = AUD_jack_get_ports(m_client, nullptr, nullptr,
+										JackPortIsPhysical | JackPortIsInput);
+	if(ports != nullptr)
+	{
+		for(int i = 0; i < m_specs.channels && ports[i]; i++)
+			AUD_jack_connect(m_client, AUD_jack_port_name(m_ports[i]), ports[i]);
+
+		AUD_jack_free(ports);
+	}
+
+	startMixingThread(buffersize);
+}
+
+JackDevice::~JackDevice()
+{
+	if(isMixingThreadRunning())
+	{
+		stopMixingThread();
+		AUD_jack_client_close(m_client);
+	}
+
+	delete[] m_ports;
+
+	destroy();
+}
+
+void JackDevice::playing(bool playing)
+{
+	MixingThreadDevice::playing(playing);
+}
+
+void JackDevice::playSynchronizer()
+{
+	AUD_jack_transport_start(m_client);
+}
+
+void JackDevice::stopSynchronizer()
+{
+	AUD_jack_transport_stop(m_client);
+}
+
+void JackDevice::seekSynchronizer(double time)
+{
+	if(time >= 0.0f)
+		AUD_jack_transport_locate(m_client, time * m_specs.rate);
+}
+
+void JackDevice::setSyncCallback(syncFunction sync, void* data)
+{
+	m_syncFunc = sync;
+	m_syncFuncData = data;
+}
+
+double JackDevice::getSynchronizerPosition()
+{
+	jack_position_t position;
+	jack_transport_state_t state = AUD_jack_transport_query(m_client, &position);
+	double result = position.frame / (double) position.frame_rate;
+
+	if(state == JackTransportRolling)
+	{
+		result += AUD_jack_frames_since_cycle_start(m_client) / (double) position.frame_rate;
+	}
+
+	return result;
+}
+
+int JackDevice::isSynchronizerPlaying()
+{
+	return AUD_jack_transport_query(m_client, nullptr);
+}
+
+class JackDeviceFactory : public IDeviceFactory
+{
+private:
+	DeviceSpecs m_specs;
+	int m_buffersize;
+	std::string m_name;
+
+public:
+	JackDeviceFactory() : m_buffersize(-1), 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(const std::string &name)
+	{
+		m_name = name;
+	}
+};
+
+void JackDevice::registerPlugin()
+{
+	if(loadJACK())
+		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