audio: steamaudio: add Steam Audio spatial audio offload module and LLEXT

app/boards/intel_adsp_ace30_ptl.conf

@@ -15,6 +15,7 @@ CONFIG_FORMAT_CONVERT_HIFI3=n
 CONFIG_COMP_GOOGLE_RTC_AUDIO_PROCESSING=m
 CONFIG_GOOGLE_RTC_AUDIO_PROCESSING_MOCK=y
 CONFIG_COMP_STFT_PROCESS=y
+CONFIG_COMP_STEAMAUDIO=m
 
 # SOF / infrastructure
 CONFIG_KCPS_DYNAMIC_CLOCK_CONTROL=n

src/audio/CMakeLists.txt

@@ -89,6 +89,9 @@ if(NOT CONFIG_COMP_MODULE_SHARED_LIBRARY_BUILD)
 	if(CONFIG_COMP_SRC)
 		add_subdirectory(src)
 	endif()
+	if(CONFIG_COMP_STEAMAUDIO)
+		add_subdirectory(steamaudio)
+	endif()
 	if(CONFIG_COMP_STFT_PROCESS)
 		add_subdirectory(stft_process)
 	endif()

src/audio/Kconfig

@@ -154,6 +154,7 @@ rsource "selector/Kconfig"
 rsource "smart_amp/Kconfig"
 rsource "sound_dose/Kconfig"
 rsource "src/Kconfig"
+rsource "steamaudio/Kconfig"
 rsource "stft_process/Kconfig"
 rsource "tdfb/Kconfig"
 rsource "template/Kconfig"

src/audio/steamaudio/CMakeLists.txt

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2017-2024 Valve Corporation. All rights reserved.
+# Copyright (c) 2026 Intel Corporation. All rights reserved.
+
+if(CONFIG_COMP_STEAMAUDIO STREQUAL "m" AND DEFINED CONFIG_LLEXT)
+  add_subdirectory(llext ${PROJECT_BINARY_DIR}/steamaudio_llext)
+  add_dependencies(app steamaudio)
+else()
+  add_local_sources(sof steamaudio.c)
+  add_local_sources(sof steamaudio-generic.c)
+  add_local_sources(sof steamaudio_hifi4.c)
+  add_local_sources(sof steamaudio_hifi5.c)
+  add_local_sources(sof steamaudio_bvh.c)
+
+  if(CONFIG_IPC_MAJOR_4)
+    add_local_sources(sof steamaudio-ipc4.c)
+  endif()
+endif()

src/audio/steamaudio/Kconfig

@@ -0,0 +1,22 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2017-2024 Valve Corporation. All rights reserved.
+# Copyright (c) 2026 Intel Corporation. All rights reserved.
+
+config COMP_STEAMAUDIO
+	tristate "Steam Audio spatial offload component"
+	default m if LIBRARY_DEFAULT_MODULAR
+	depends on IPC_MAJOR_4
+	help
+	  Select for Steam Audio spatial audio offload component.
+	  Provides 3D binaural HRTF spatialization, direct sound modeling,
+	  3-band biquad IIR filtering, 8-channel Householder Feedback Delay
+	  Network (FDN) reverberation, 1st-order Ambisonics rotation/decoding,
+	  and on-chip DSP BVH ray tracing for real-time room acoustic simulation.
+
+if COMP_STEAMAUDIO
+
+rsource "Kconfig.simd"
+
+endif # COMP_STEAMAUDIO
+

src/audio/steamaudio/Kconfig.simd

@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2017-2024 Valve Corporation. All rights reserved.
+# Copyright (c) 2026 Intel Corporation. All rights reserved.
+
+comment "Steam Audio optimization level select"
+
+choice "STEAMAUDIO_SIMD_LEVEL_SELECT"
+	prompt "choose which SIMD level used for Steam Audio module"
+	depends on COMP_STEAMAUDIO
+	default STEAMAUDIO_HIFI_MAX
+
+	config STEAMAUDIO_HIFI_MAX
+		prompt "SIMD will be selected by toolchain pre-defined header"
+		bool
+		help
+		  When this is selected, optimization level will be determined
+		  by toolchain pre-defined macros in core-isa header file.
+
+	config STEAMAUDIO_HIFI_5
+		prompt "choose HIFI5 intrinsic optimized Steam Audio module"
+		bool
+		help
+		  This option is used to build HIFI5 optimized Steam Audio code.
+
+	config STEAMAUDIO_HIFI_4
+		prompt "choose HIFI4 intrinsic optimized Steam Audio module"
+		bool
+		help
+		  This option is used to build HIFI4 optimized Steam Audio code.
+
+	config STEAMAUDIO_HIFI_NONE
+		prompt "choose generic C Steam Audio module, no HIFI SIMD involved"
+		bool
+		help
+		  This option is used to build Steam Audio generic C code.
+endchoice

src/audio/steamaudio/llext/CMakeLists.txt

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright (c) 2017-2024 Valve Corporation. All rights reserved.
+# Copyright (c) 2026 Intel Corporation. All rights reserved.
+
+set(steamaudio_sources
+	../steamaudio.c
+	../steamaudio-generic.c
+	../steamaudio_hifi4.c
+	../steamaudio_hifi5.c
+	../steamaudio_bvh.c
+)
+
+if(CONFIG_IPC_MAJOR_4)
+	list(APPEND steamaudio_sources ../steamaudio-ipc4.c)
+endif()
+
+sof_llext_build("steamaudio"
+	SOURCES ${steamaudio_sources}
+	LIB openmodules
+)

src/audio/steamaudio/llext/llext.toml.h

@@ -0,0 +1,6 @@
+#include <tools/rimage/config/platform.toml>
+#define LOAD_TYPE "2"
+#include "../steamaudio.toml"
+
+[module]
+count = __COUNTER__