Topics

Here is a list of all topics with brief descriptions:

[detail level 12]

Static Audio Pipeline Engine	The Static Audio Pipeline subsystem provides compile-time and runtime declarative topology construction for hostless, microcontroller, and standalone embedded platforms running Sound Open Firmware
▼IPC4 Host-DSP Protocol	Intel and AMD IPC4 protocol definitions, message structures, base firmware, gateways, and notifications
IPC4 Message Envelope & Dispatch	64-bit mailbox message envelope formats, primary/extension registers, command target routing, reply status, and compound message barriers
IPC4 Base Firmware & Global Configuration	Core 0 Base Firmware management, ADSP global properties, hardware capabilities, memory pools, power budget tables, and crash dump telemetry
IPC4 Pipeline Lifecycle & State Machine	Pipeline creation, priority assignments, state machine transitions (RESET, PAUSED, RUNNING, EOS), multi-pipeline synchronization, and save/restore
IPC4 Module Architecture & Dynamic Binding	Module instantiation, dynamic queue/pin binding, small/large parameter configuration handshake, and module power transitions
IPC4 Audio Formats & Pin Contracts	Audio format specification bitfields, sampling rates, bit depths, channel configurations, and pin format descriptors
IPC4 Hardware Audio Gateways	Audio gateway addressing (HD-Audio host/link, SoundWire ALH aggregation, DMIC link, SSP/I2S), gateway attributes, and NHLT configuration blobs
IPC4 Asynchronous Notifications & Telemetry Registers	Unsolicited DSP-to-host notifications, resource event reports, keyword detection events, watchdog alerts, and Mailbox Window 0 status registers
IPC4 Telemetry, Logging & Audio Probes	Host DMA trace logging control, audio probe injection and extraction data streams, and module-specific configuration payloads
IPC3 Host-DSP Protocol	Legacy IPC3 protocol definitions, commands, and stream controls
Audio Processing Components & Module Interface	Unified interface contracts, lifecycle callbacks, and streaming endpoints for built-in audio components and dynamic LLEXT processing modules (Volume, Mixer, EQ, DRC, SRC, etc.)
Pipeline Graph & Lifecycle Infrastructure	Directed Acyclic Graph (DAG) pipeline creation, scheduling binding, traversal, and lifecycle management
Audio Component Infrastructure & Driver Model	Component driver interface, operations vtable, hardware abstraction, IPC binding, and state machines
Audio Buffer & Stream Infrastructure	Interconnect buffers, circular stream buffers, abstract audio buffers, and lockless ring buffers
Audio Formats & Channel Routing	Channel map parsing, stream conversion, and audio sample saturation routines
Scheduling Infrastructure	Real-time task schedulers (Low-Latency Timer/DMA, Data Processing preemptible threads, Thread With Budget), scheduling domains, and task state machines
Memory Management Infrastructure	System heaps, Virtual Memory Heap (VMH), virtual regions, cold DRAM staging, and audio buffer allocators
RTOS Abstraction Layer	RTOS primitives, synchronization (spinlocks, mutexes), task scheduling, clocks, timers, and cache management
DSP Math & Filter Libraries	Fixed-point, floating-point, FFT, FIR/IIR accelerators, and vector math routines
▼Telemetry, Logging & Probes	Real-time DSP trace logging, probe extraction/injection buffers, DMA telemetry, and panic dumps
Trace DMA & Dictionary Logging	Circular host DMA trace buffers, dictionary-based logger (.ldc), runtime log level filtering, and panic crash dumps
Audio Probes & Stream Tap Points	Dynamic pipeline buffer extraction and injection probes, probe DMA frames, and synchronization sync words
Hardware Telemetry & Performance Monitoring	Core system ticks, CPU cycle utilization, component performance tracking, and SRAM Window 0/3 telemetry status registers
Debug Streams & Low-Level Debugging	Structured debug stream records, Memory Window 2 debug slots, mailbox debug dumps, and GDB target stub
Platform & Hardware Drivers	Digital Audio Interfaces (DAI), Direct Memory Access (DMA), and Power Management (PM) runtime