Audio: Phase Vocoder: Add source files for new component

WIP

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

Author: singalsu

src/audio/phase_vocoder/CMakeLists.txt

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
+if(CONFIG_COMP_PHASE_VOCODER STREQUAL "m" AND DEFINED CONFIG_LLEXT)
+  add_subdirectory(llext ${PROJECT_BINARY_DIR}/phase_vocoder_llext)
+  add_dependencies(app phase_vocoder)
+else()
+  add_local_sources(sof phase_vocoder.c)
+  add_local_sources(sof phase_vocoder_setup.c)
+  add_local_sources(sof phase_vocoder_common.c)
+  add_local_sources(sof phase_vocoder-generic.c)
+
+  if(CONFIG_IPC_MAJOR_4)
+    add_local_sources(sof phase_vocoder-ipc4.c)
+  endif()
+endif()

src/audio/phase_vocoder/Kconfig

@@ -0,0 +1,11 @@
+# SPDX-License-Identifier: BSD-3-Clause
+
+config COMP_PHASE_VOCODER
+	tristate "Phase Vocoder component"
+	default n
+	select MATH_FFT
+	select MATH_32BIT_FFT
+	help
+	  Select for phase_vocoder component. The component provides
+	  render speed control in range 0.5-2.0 while preserving
+	  audio content pitch.

src/audio/phase_vocoder/llext/CMakeLists.txt

@@ -0,0 +1,11 @@
+# Copyright (c) 2026 Intel Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+sof_llext_build("phase_vocoder"
+	SOURCES	../phase_vocoder.c
+		../phase_vocoder_setup.c
+		../phase_vocoder_common.c
+		../phase_vocoder-generic.c
+		../phase_vocoder-ipc4.c
+	LIB openmodules
+)

src/audio/phase_vocoder/llext/llext.toml.h

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