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add AU parameter listening stuff from 2.X

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git-svn-id: svn://localhost/ardour2/branches/3.0@10242 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2011-10-19 20:31:00 +00:00
parent 3a109f797d
commit f1928b85bb
2 changed files with 131 additions and 25 deletions
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131
libs/ardour/audio_unit.cc
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@ -345,10 +345,12 @@ AUPlugin::AUPlugin (AudioEngine& engine, Session& session, boost::shared_ptr<CAC
, _current_block_size (0)
, _requires_fixed_size_buffers (false)
, buffers (0)
, current_maxbuf (0)
, current_offset (0)
, current_buffers (0)
, input_maxbuf (0)
, input_offset (0)
, input_buffers (0)
, frames_processed (0)
, _parameter_listener (0)
, _parameter_listener_arg (0)
, last_transport_rolling (false)
, last_transport_speed (0.0)
{
@ -373,10 +375,12 @@ AUPlugin::AUPlugin (const AUPlugin& other)
, _last_nframes (0)
, _requires_fixed_size_buffers (false)
, buffers (0)
, current_maxbuf (0)
, current_offset (0)
, current_buffers (0)
, input_maxbuf (0)
, input_offset (0)
, input_buffers (0)
, frames_processed (0)
, _parameter_listener (0)
, _parameter_listener_arg (0)
{
init ();
@ -384,6 +388,11 @@ AUPlugin::AUPlugin (const AUPlugin& other)
AUPlugin::~AUPlugin ()
{
if (_parameter_listener) {
AUListenerDispose (_parameter_listener);
_parameter_listener = 0;
}
if (unit) {
DEBUG_TRACE (DEBUG::AudioUnits, "about to call uninitialize in plugin destructor\n");
unit->Uninitialize ();
@ -501,6 +510,7 @@ AUPlugin::init ()
throw failed_constructor();
}
create_parameter_listener (AUPlugin::_parameter_change_listener, this, 0.05);
discover_parameters ();
discover_factory_presets ();
@ -616,6 +626,10 @@ AUPlugin::discover_parameters ()
d.max_unbound = 0; // upper is bound
descriptors.push_back (d);
uint32_t last_param = descriptors.size() - 1;
parameter_map.insert (pair<uint32_t,uint32_t> (d.id, last_param));
listen_to_parameter (last_param);
}
}
}
@ -1248,11 +1262,11 @@ AUPlugin::render_callback(AudioUnitRenderActionFlags*,
DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("%1: render callback, frames %2 bufs %3\n",
name(), inNumberFrames, ioData->mNumberBuffers));
if (current_maxbuf == 0) {
if (input_maxbuf == 0) {
error << _("AUPlugin: render callback called illegally!") << endmsg;
return kAudioUnitErr_CannotDoInCurrentContext;
}
uint32_t limit = min ((uint32_t) ioData->mNumberBuffers, current_maxbuf);
uint32_t limit = min ((uint32_t) ioData->mNumberBuffers, input_maxbuf);
for (uint32_t i = 0; i < limit; ++i) {
ioData->mBuffers[i].mNumberChannels = 1;
@ -1263,7 +1277,7 @@ AUPlugin::render_callback(AudioUnitRenderActionFlags*,
passed to PluginInsert::connect_and_run()
*/
ioData->mBuffers[i].mData = current_buffers->get_audio (i).data (cb_offset + current_offset);
ioData->mBuffers[i].mData = input_buffers->get_audio (i).data (cb_offset + input_offset);
}
cb_offset += inNumberFrames;
@ -1290,9 +1304,9 @@ AUPlugin::connect_and_run (BufferSet& bufs, ChanMapping in_map, ChanMapping out_
*/
assert (bufs.available() >= ChanCount (DataType::AUDIO, output_channels));
current_buffers = &bufs;
current_maxbuf = bufs.count().n_audio(); // number of input audio buffers
current_offset = offset;
input_buffers = &bufs;
input_maxbuf = bufs.count().n_audio(); // number of input audio buffers
input_offset = offset;
cb_offset = 0;
DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("%1 in %2 out %3 MIDI %4 bufs %5 (available %6)\n",
@ -1347,7 +1361,7 @@ AUPlugin::connect_and_run (BufferSet& bufs, ChanMapping in_map, ChanMapping out_
if ((err = unit->Render (&flags, &ts, 0, nframes, buffers)) == noErr) {
current_maxbuf = 0;
input_maxbuf = 0;
frames_processed += nframes;
DEBUG_TRACE (DEBUG::AudioUnits, string_compose ("%1 rendered %2 buffers of %3\n",
@ -1398,8 +1412,8 @@ AUPlugin::get_beat_and_tempo_callback (Float64* outCurrentBeat,
}
Timecode::BBT_Time bbt;
TempoMetric metric = tmap.metric_at (_session.transport_frame() + current_offset);
tmap.bbt_time_with_metric (_session.transport_frame() + current_offset, bbt, metric);
TempoMetric metric = tmap.metric_at (_session.transport_frame() + input_offset);
tmap.bbt_time_with_metric (_session.transport_frame() + input_offset, bbt, metric);
if (outCurrentBeat) {
float beat;
@ -1437,8 +1451,8 @@ AUPlugin::get_musical_time_location_callback (UInt32* outDeltaSampleOffsetToNe
}
Timecode::BBT_Time bbt;
TempoMetric metric = tmap.metric_at (_session.transport_frame() + current_offset);
tmap.bbt_time_with_metric (_session.transport_frame() + current_offset, bbt, metric);
TempoMetric metric = tmap.metric_at (_session.transport_frame() + input_offset);
tmap.bbt_time_with_metric (_session.transport_frame() + input_offset, bbt, metric);
if (outDeltaSampleOffsetToNextBeat) {
if (bbt.ticks == 0) {
@ -1505,9 +1519,9 @@ AUPlugin::get_transport_state_callback (Boolean* outIsPlaying,
if (outCurrentSampleInTimeLine) {
/* this assumes that the AU can only call this host callback from render context,
where current_offset is valid.
where input_offset is valid.
*/
*outCurrentSampleInTimeLine = _session.transport_frame() + current_offset;
*outCurrentSampleInTimeLine = _session.transport_frame() + input_offset;
}
if (outIsCycling) {
@ -1532,7 +1546,7 @@ AUPlugin::get_transport_state_callback (Boolean* outIsPlaying,
Timecode::BBT_Time bbt;
if (outCycleStartBeat) {
TempoMetric metric = tmap.metric_at (loc->start() + current_offset);
TempoMetric metric = tmap.metric_at (loc->start() + input_offset);
_session.tempo_map().bbt_time_with_metric (loc->start(), bbt, metric);
float beat;
@ -1544,7 +1558,7 @@ AUPlugin::get_transport_state_callback (Boolean* outIsPlaying,
}
if (outCycleEndBeat) {
TempoMetric metric = tmap.metric_at (loc->end() + current_offset);
TempoMetric metric = tmap.metric_at (loc->end() + input_offset);
_session.tempo_map().bbt_time_with_metric (loc->end(), bbt, metric);
float beat;
@ -2662,3 +2676,78 @@ AUPlugin::set_info (PluginInfoPtr info)
_has_midi_input = pinfo->needs_midi_input ();
_has_midi_output = false;
}
int
AUPlugin::create_parameter_listener (AUEventListenerProc cb, void* arg, float interval_secs)
{
CFRunLoopRef run_loop = (CFRunLoopRef) GetCFRunLoopFromEventLoop(GetCurrentEventLoop());
CFStringRef loop_mode = kCFRunLoopDefaultMode;
if (AUEventListenerCreate (cb, arg, run_loop, loop_mode, interval_secs, interval_secs, &_parameter_listener) != noErr) {
return -1;
}
_parameter_listener_arg = arg;
return 0;
}
int
AUPlugin::listen_to_parameter (uint32_t param_id)
{
AudioUnitEvent event;
if (!_parameter_listener || param_id >= descriptors.size()) {
return -2;
}
event.mEventType = kAudioUnitEvent_ParameterValueChange;
event.mArgument.mParameter.mAudioUnit = unit->AU();
event.mArgument.mParameter.mParameterID = descriptors[param_id].id;
event.mArgument.mParameter.mScope = descriptors[param_id].scope;
event.mArgument.mParameter.mElement = descriptors[param_id].element;
if (AUEventListenerAddEventType (_parameter_listener, _parameter_listener_arg, &event) != noErr) {
return -1;
}
return 0;
}
int
AUPlugin::end_listen_to_parameter (uint32_t param_id)
{
AudioUnitEvent event;
if (!_parameter_listener || param_id >= descriptors.size()) {
return -2;
}
event.mEventType = kAudioUnitEvent_ParameterValueChange;
event.mArgument.mParameter.mAudioUnit = unit->AU();
event.mArgument.mParameter.mParameterID = descriptors[param_id].id;
event.mArgument.mParameter.mScope = descriptors[param_id].scope;
event.mArgument.mParameter.mElement = descriptors[param_id].element;
if (AUEventListenerRemoveEventType (_parameter_listener, _parameter_listener_arg, &event) != noErr) {
return -1;
}
return 0;
}
void
AUPlugin::_parameter_change_listener (void* arg, void* src, const AudioUnitEvent* event, UInt64 host_time, Float32 new_value)
{
((AUPlugin*) arg)->parameter_change_listener (arg, src, event, host_time, new_value);
}
void
AUPlugin::parameter_change_listener (void* /*arg*/, void* /*src*/, const AudioUnitEvent* event, UInt64 host_time, Float32 new_value)
{
ParameterMap::iterator i = parameter_map.find (event->mArgument.mParameter.mParameterID);
if (i != parameter_map.end()) {
ParameterChanged (i->second, new_value);
}
}