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Advanced Gtk+ Sequencer version 7.0.x announcement

Item posted by Joël Krähemann <jkraehemann> on Sun 13 Oct 2024 09:43:06 AM UTC.

Highlights of the new major release of GSequencer are the use of AgsVector256Manager resulting in better optimized vector intrinsic operations and support for MIDI version 1 and 2 control change messages. Further MIDI version 2 record ability of ags-fx-notation and ags-fx-envelope with enable LFO port.

Some refactorings have taken place, too. Resulting in some ABI breakage.

The AgsVector256Manager provding prefaulted vector arrays

Following new functions are provided by this object:

ags_vector_256_manager_get_type()
ags_vector_arr_alloc()
ags_vector_arr_free()
ags_vector_256_manager_reserve_all()
ags_vector_256_manager_try_acquire()
ags_vector_256_manager_try_acquire_dual()
ags_vector_256_manager_try_acquire_triple()
ags_vector_256_manager_release()
ags_vector_256_manager_get_instance()
ags_vector_256_manager_new()

Usual use-case is you try acquire some buffers perform vector operations on prefaulted memory and then release the buffer, again.

AgsVector256Manager *vector_256_manager = ags_vector_256_manager_get_instance();

AgsVectorArr *buffer_arr;

guint j;

while((buffer_arr = ags_vector_256_manager_try_acquire(vector_256_manager,
AGS_VECTOR_256_SIGNED_16_BIT)) != NULL){
g_thread_yield();
}

// call audio buffer fill functions
// then perform vector operations
// and call audio buffer fetch functions

ags_vector_256_manager_release(vector_256_manager,
buffer_arr);

Improved MIDI version 1 and 2 support

AgsRecall has seen some updates and has got support to poll for MIDI control change messages. These are the new AgsRecallFlags introduced:

AGS_RECALL_MIDI1
AGS_RECALL_MIDI1_CONTROL_CHANGE
AGS_RECALL_MIDI2
AGS_RECALL_MIDI2_CONTROL_CHANGE

These new functions support hash tables mapping control change messages and to poll for those messages:

ags_recall_get_midi1_cc_to_value()
ags_recall_get_midi1_cc_to_port_specifier()
ags_recall_get_midi2_cc_to_value()
ags_recall_get_midi2_cc_to_port_specifier()
ags_recall_midi1_control_change()
ags_recall_midi2_control_change()

ags-fx-notation is now capable to consume MIDI version 2 key-on and key-off messages.

ags-fx-envelope with enable LFO port

AgsEnvelopeUtil supports now to apply a LFO resulting in smoother envelope, it is triggered by AgsFxEnvelopeAudio:enable-lfo property as AgsPort.

Deprecated functions

deprecated ags_fx_notation_audio_processor_record() because of MIDI version 2 transition
deprecated ags_audio_buffer_util_get_copy_mode() because of future naming conflict with getter of struct field
deprecated ags_envelope_*_wah_wah_*() because not used
deprecated ags_sf2_synth_util_boxed_copy() for uniform naming schema
deprecated ags_sfz_synth_util_boxed_copy() for uniform naming schema
deprecated ags_time_stretch_util_get_buffer_size() for uniform naming schema
deprecated ags_time_stretch_util_set_buffer_size() for uniform naming schema

by Joël