Graph struct
#include <audio/graph.h>

Public variables

Router* router: Pointer back to router for convenience.
int destroying: Flag to indicate if graph is currently getting destroyed.
GHashTable* graph_nodes: List of all graph nodes (only used for memory management)
GraphNode** init_trigger_list: Nodes without incoming edges.
gint n_terminal_nodes: Number of graph nodes without an outgoing edge.
volatile gint terminal_refcnt: Remaining unprocessed terminal nodes in this cycle.
ZixSem callback_start: Synchronization with main process callback.
ZixSem trigger: Wake up graph node process threads.
MPMCQueue* trigger_queue: Queue containing nodes that can be processed.
volatile guint trigger_queue_size: Number of entries in trigger queue.
volatile gint terminate: flag to exit, terminate all process-threads
volatile guint idle_thread_cnt: Number of threads waiting for work.
GHashTable* setup_graph_nodes: Chain used to setup in the background.
GraphNode** setup_terminal_nodes: Used only when constructing the graph so we can traverse the graph backwards to calculate the playback latencies.
int initial_processor: Dummy member to make lookups work.
GPtrArray* external_out_ports: An array of pointers to ports that are exposed to the backend and are outputs.

List of all graph nodes (only used for memory management)

key = internal pointer, value = graph node.

Nodes without incoming edges.

These run concurrently at the start of each cycle to kick off processing

Chain used to setup in the background.

This is applied and cleared by graph_rechain() key = internal pointer, value = graph node.

An array of pointers to ports that are exposed to the backend and are outputs.

Used to clear their buffers when returning early from the processing cycle.