MLECO-2354 MLECO-2355 MLECO-2356: Moving noise reduction to public repository

* Use RNNoise model from PMZ
* Add Noise reduction use-case

Signed-off-by: Richard burton <richard.burton@arm.com>
Change-Id: Ia8cc7ef102e22a5ff8bfbd3833594a4905a66057
diff --git a/source/use_case/noise_reduction/usecase.cmake b/source/use_case/noise_reduction/usecase.cmake
new file mode 100644
index 0000000..14cff17
--- /dev/null
+++ b/source/use_case/noise_reduction/usecase.cmake
@@ -0,0 +1,110 @@
+#----------------------------------------------------------------------------
+#  Copyright (c) 2021 Arm Limited. All rights reserved.
+#  SPDX-License-Identifier: Apache-2.0
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#----------------------------------------------------------------------------
+
+USER_OPTION(${use_case}_ACTIVATION_BUF_SZ "Activation buffer size for the chosen model"
+    0x00200000
+    STRING)
+
+if (ETHOS_U_NPU_ENABLED)
+    set(DEFAULT_MODEL_PATH      ${DEFAULT_MODEL_DIR}/rnnoise_INT8_vela_${DEFAULT_NPU_CONFIG_ID}.tflite)
+else()
+    set(DEFAULT_MODEL_PATH      ${DEFAULT_MODEL_DIR}/rnnoise_INT8.tflite)
+endif()
+
+USER_OPTION(${use_case}_MODEL_TFLITE_PATH "NN models file to be used in the evaluation application. Model files must be in tflite format."
+    ${DEFAULT_MODEL_PATH}
+    FILEPATH)
+
+USER_OPTION(${use_case}_FILE_PATH "Directory with custom WAV input files, or path to a single WAV file, to use in the evaluation application."
+    ${CMAKE_CURRENT_SOURCE_DIR}/resources/${use_case}/samples/
+    PATH_OR_FILE)
+
+USER_OPTION(${use_case}_AUDIO_RATE "Specify the target sampling rate. Default is 48000."
+    48000
+    STRING)
+
+USER_OPTION(${use_case}_AUDIO_MONO "Specify if the audio needs to be converted to mono. Default is ON."
+    ON
+    BOOL)
+
+USER_OPTION(${use_case}_AUDIO_OFFSET "Specify the offset to start reading after this time (in seconds). Default is 0."
+    0
+    STRING)
+
+USER_OPTION(${use_case}_AUDIO_DURATION "Specify the audio duration to load (in seconds). If set to 0 the entire audio will be processed."
+    0
+    STRING)
+
+USER_OPTION(${use_case}_AUDIO_RES_TYPE "Specify re-sampling algorithm to use. By default is 'kaiser_best'."
+    kaiser_best
+    STRING)
+
+USER_OPTION(${use_case}_AUDIO_MIN_SAMPLES "Specify the minimum number of samples to use. Default is 480, if the audio is shorter it will be automatically padded."
+    480
+    STRING)
+
+# Generate input files from audio wav files
+generate_audio_code(${${use_case}_FILE_PATH} ${SRC_GEN_DIR} ${INC_GEN_DIR}
+    ${${use_case}_AUDIO_RATE}
+    ${${use_case}_AUDIO_MONO}
+    ${${use_case}_AUDIO_OFFSET}
+    ${${use_case}_AUDIO_DURATION}
+    ${${use_case}_AUDIO_RES_TYPE}
+    ${${use_case}_AUDIO_MIN_SAMPLES})
+
+
+set(EXTRA_MODEL_CODE
+    "/* Model parameters for ${use_case} */"
+    "extern const int        g_FrameLength         = 480"
+    "extern const int        g_FrameStride         = 480"
+    "extern const uint32_t   g_NumInputFeatures    = 42*1"  # Single time-step input of 42 features.
+    )
+
+# Generate model file.
+generate_tflite_code(
+    MODEL_PATH ${${use_case}_MODEL_TFLITE_PATH}
+    DESTINATION ${SRC_GEN_DIR}
+    EXPRESSIONS ${EXTRA_MODEL_CODE}
+)
+
+
+# For MPS3, allow dumping of output data to memory, based on these parameters:
+if (TARGET_PLATFORM STREQUAL mps3)
+    USER_OPTION(${use_case}_MEM_DUMP_BASE_ADDR
+        "Inference output dump address for ${use_case}"
+        0x80000000 # DDR bank 2
+        STRING)
+
+    USER_OPTION(${use_case}_MEM_DUMP_LEN
+        "Inference output dump buffer size for ${use_case}"
+        0x00100000 # 1 MiB
+        STRING)
+
+    # Add special compile definitions for this use case files:
+    set(${use_case}_COMPILE_DEFS
+        "MEM_DUMP_BASE_ADDR=${${use_case}_MEM_DUMP_BASE_ADDR}"
+        "MEM_DUMP_LEN=${${use_case}_MEM_DUMP_LEN}")
+
+    file(GLOB_RECURSE SRC_FILES
+        "${SRC_USE_CASE}/${use_case}/src/*.cpp"
+        "${SRC_USE_CASE}/${use_case}/src/*.cc")
+
+    set_source_files_properties(
+        ${SRC_FILES}
+        PROPERTIES COMPILE_DEFINITIONS
+        "${${use_case}_COMPILE_DEFS}")
+endif()