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/* This file is part of the KDE project.
Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 2.1 or 3 of the License.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "audionode.h"
#include "audiograph.h"
#include "audioconnection.h"
#include "medianode.h"
QT_BEGIN_NAMESPACE
namespace Phonon
{
namespace QT7
{
AudioNode::AudioNode(int maxInputBusses, int maxOutputBusses)
{
m_auNode = 0;
m_audioUnit = 0;
m_audioGraph = 0;
m_maxInputBusses = maxInputBusses;
m_maxOutputBusses = maxOutputBusses;
m_lastConnectionIn = 0;
}
AudioNode::~AudioNode()
{
setGraph(0);
}
void AudioNode::setGraph(AudioGraph *audioGraph)
{
if (m_audioGraph == audioGraph)
return;
DEBUG_AUDIO_GRAPH("AudioNode" << int(this) << "is setting graph:" << int(audioGraph))
if (m_auNode){
AUGraphRemoveNode(m_audioGraph->audioGraphRef(), m_auNode);
m_auNode = 0;
}
m_audioUnit = 0;
m_lastConnectionIn = 0;
m_audioGraph = audioGraph;
}
void AudioNode::createAndConnectAUNodes()
{
if (m_auNode)
return;
ComponentDescription description = getAudioNodeDescription();
DEBUG_AUDIO_GRAPH("AudioNode" << int(this) << "creates AUNode"
<< QString(!FindNextComponent(0, &description) ? "ERROR: COMPONENT NOT FOUND!" : "OK!"))
OSStatus err = noErr;
// The proper function to call here is AUGraphAddNode() but the type has
// changed between 10.5 and 10.6. it's still OK to call this function, but
// if we want to use the proper thing we need to move over to
// AudioComponentDescription everywhere, which is very similar to the
// ComponentDescription, but a different size. however,
// AudioComponentDescription only exists on 10.6+. More fun than we need to
// deal with at the moment, so we'll take the "deprecated" warning instead.
err = AUGraphNewNode(m_audioGraph->audioGraphRef(), &description, 0, 0, &m_auNode);
BACKEND_ASSERT2(err != kAUGraphErr_OutputNodeErr, "A MediaObject can only be connected to one audio output device.", FATAL_ERROR)
BACKEND_ASSERT2(err == noErr, "Could not create new AUNode.", FATAL_ERROR)
}
AUNode AudioNode::getInputAUNode()
{
return m_auNode;
}
AUNode AudioNode::getOutputAUNode()
{
return m_auNode;
}
void AudioNode::createAudioUnits()
{
if (m_audioUnit)
return;
DEBUG_AUDIO_GRAPH("AudioNode" << int(this) << "creates AudioUnit")
OSStatus err = AUGraphGetNodeInfo(m_audioGraph->audioGraphRef(), m_auNode, 0, 0, 0, &m_audioUnit);
BACKEND_ASSERT2(err == noErr, "Could not get audio unit from audio node.", FATAL_ERROR)
initializeAudioUnit();
}
ComponentDescription AudioNode::getAudioNodeDescription() const
{
// Override if needed.
ComponentDescription cd;
Q_UNUSED(cd);
return cd;
}
bool AudioNode::setStreamHelp(AudioConnection *c, int bus, OSType scope, bool fromSource)
{
if (fromSource){
OSStatus err = AudioUnitSetProperty(m_audioUnit, kAudioUnitProperty_StreamFormat, scope,
bus, &c->m_sourceStreamDescription, sizeof(AudioStreamBasicDescription));
if (err != noErr){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << " - failed setting stream format")
return false;
}
AudioUnitSetProperty(m_audioUnit, kAudioUnitProperty_AudioChannelLayout, scope,
bus, c->m_sourceChannelLayout, c->m_sourceChannelLayoutSize);
} else {
OSStatus err = AudioUnitSetProperty(m_audioUnit, kAudioUnitProperty_StreamFormat, scope,
bus, &c->m_sinkStreamDescription, sizeof(AudioStreamBasicDescription));
if (err != noErr){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << " - failed setting stream format")
return false;
}
AudioUnitSetProperty(m_audioUnit, kAudioUnitProperty_AudioChannelLayout, scope,
bus, c->m_sinkChannelLayout, c->m_sourceChannelLayoutSize);
}
return true;
}
bool AudioNode::setStreamSpecification(AudioConnection *connection, ConnectionSide side)
{
if (side == Source){
// This object am source of connection:
if (connection->m_hasSourceSpecification){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "sets stream specification out"
<< connection->m_sourceOutputBus << "from connection source")
return setStreamHelp(connection, connection->m_sourceOutputBus, kAudioUnitScope_Output, true);
} else {
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "did not set stream specification out")
}
} else {
if (connection->m_hasSinkSpecification){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "sets stream specification"
<< connection->m_sinkInputBus << "from connection sink")
return setStreamHelp(connection, connection->m_sinkInputBus, kAudioUnitScope_Input, false);
} else if (connection->m_hasSourceSpecification){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "sets stream specification"
<< connection->m_sinkInputBus << "from connection source")
return setStreamHelp(connection, connection->m_sinkInputBus, kAudioUnitScope_Input, true);
} else {
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "did not set stream specification in")
}
}
return true;
}
bool AudioNode::fillInStreamSpecification(AudioConnection *connection, ConnectionSide side)
{
if (side == Source){
// As default, use the last description to describe the source:
if (m_lastConnectionIn->m_hasSinkSpecification){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "is source, and fills in stream spec using last connection sink.")
connection->m_sourceStreamDescription = m_lastConnectionIn->m_sinkStreamDescription;
connection->m_sourceChannelLayout = (AudioChannelLayout *) malloc(m_lastConnectionIn->m_sinkChannelLayoutSize);
memcpy(connection->m_sourceChannelLayout, m_lastConnectionIn->m_sinkChannelLayout, m_lastConnectionIn->m_sinkChannelLayoutSize);
connection->m_sourceChannelLayoutSize = m_lastConnectionIn->m_sinkChannelLayoutSize;
connection->m_hasSourceSpecification = true;
} else if (m_lastConnectionIn->m_hasSourceSpecification){
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "is source, and fills in stream spec using last connection source.")
connection->m_sourceStreamDescription = m_lastConnectionIn->m_sourceStreamDescription;
connection->m_sourceChannelLayout = (AudioChannelLayout *) malloc(m_lastConnectionIn->m_sourceChannelLayoutSize);
memcpy(connection->m_sourceChannelLayout, m_lastConnectionIn->m_sourceChannelLayout, m_lastConnectionIn->m_sourceChannelLayoutSize);
connection->m_sourceChannelLayoutSize = m_lastConnectionIn->m_sourceChannelLayoutSize;
connection->m_hasSourceSpecification = true;
} else {
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << " __WARNING__: could not get stream specification...")
}
} else {
DEBUG_AUDIO_STREAM("AudioNode" << int(this) << "is sink, skips filling in stream.")
if (!connection->isSinkOnly())
m_lastConnectionIn = connection;
}
return true;
}
/**
Let timeProperty be one of e.g
{kAudioUnitProperty_Latency, kAudioUnitProperty_TailTime,
kAudioOutputUnitProperty_StartTime, kAudioUnitProperty_CurrentPlayTime}
*/
Float64 AudioNode::getTimeInSamples(int timeProperty)
{
if (!m_audioUnit)
return 0;
AudioTimeStamp timeStamp;
UInt32 size = sizeof(timeStamp);
memset(&timeStamp, 0, sizeof(timeStamp));
OSStatus err = AudioUnitGetProperty(m_audioUnit,
timeProperty, kAudioUnitScope_Global,
0, &timeStamp, &size);
if (err != noErr)
return 0;
return timeStamp.mSampleTime;
}
void AudioNode::notify(const MediaNodeEvent *event)
{
switch(event->type()){
case MediaNodeEvent::AudioGraphAboutToBeDeleted:
setGraph(0);
break;
case MediaNodeEvent::NewAudioGraph:
setGraph(static_cast<AudioGraph *>(event->data()));
break;
default:
break;
}
mediaNodeEvent(event);
}
void AudioNode::mediaNodeEvent(const MediaNodeEvent */*event*/)
{
// Override if needed
}
void AudioNode::initializeAudioUnit()
{
// Override if needed.
}
}} //namespace Phonon::QT7
QT_END_NAMESPACE
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