Integrate RISP4ML into Shodan ML Toolchain using Fssd model

This CL is Part 2 of the comprehensive 3-part changes of integrating RISP4ML into Shodan ML toolchain. This change focuses on integrating RISP4ML using the FSSD model as an example.

I have verifed that the output@RISP4ML running on Qemu/Renode completely matches with the output@RISPML running on google3.

Details of the 3-part changes:

(Part 1) Completely re-wrote RISP4ML in plain C.
- https://spacebeaker-review.googlesource.com/c/shodan/sw/vec-iree/+/17180
- The original RISP4ML on google3 was written in C++. The memory usage with C++ RISP4ML was significantly larger. Thus, I have completely re-written RISP4ML in plain C. The memory increase with the plain-C RISP4ML is much smaller.
- Made the input/output shape to be configurable arguments instead of constants.
- Made low-level optimizations and simplifications.

(Part 2) Integrated plain-C RISP4ML into Shodan ML toolchain (this CL)
- Use fssd_25_8bit_v2 as an example to load the binary (raw bayer) file and go through RISP4ML toolchain, and feed the RISP4ML output into IREE flow.
- The fssd_25_8bit_v2 example is up and running, and the correctness of output has been verified (compare output@plain-C risp4ml against output@google3).

(Part 3) Added unit tests for plain-C RISP4ML
- Added unit tests based on pw_unit_test
- Build unit tests in iree_cc_binary
- Run and check unit tests via lit_test

Change-Id: I90eb31cb4b5cecfee79ad0952025ad97e12b9b52

samples/quant_model/CMakeLists.txt

diff --git a/samples/quant_model/CMakeLists.txt b/samples/quant_model/CMakeLists.txt
index c0ed7c3..e3e70ff 100644
--- a/samples/quant_model/CMakeLists.txt
+++ b/samples/quant_model/CMakeLists.txt
@@ -159,6 +159,20 @@
   QUANT
 )
 
+if(${BUILD_INTERNAL_MODELS})
+
+iree_model_input(
+  NAME
+    fssd_quant_input
+  SHAPE
+    "1, 480, 640, 1"
+  SRC
+    "$ENV{ROOTDIR}/sw/vec_iree/samples/risp4ml/test_data/faces_480x640_uint8_numpy_bayer.bin"
+  QUANT
+)
+
+endif(${BUILD_INTERNAL_MODELS})
+
 #-------------------------------------------------------------------------------
 # Binaries to execute the MLIR bytecode modules
 #-------------------------------------------------------------------------------
@@ -334,9 +348,11 @@
   SRCS
     "fssd_25_8bit_v2.c"
   DEPS
+    ::fssd_quant_input_c
     ::fssd_25_8bit_v2_bytecode_module_static
     ::fssd_25_8bit_v2_bytecode_module_static_c
     iree::vm::bytecode_module
+    samples::risp4ml::pipeline::pipeline
     samples::util::util
   LINKOPTS
     "LINKER:--defsym=__stack_size__=100k"
@@ -348,8 +364,10 @@
   SRCS
     "fssd_25_8bit_v2.c"
   DEPS
+    ::fssd_quant_input_c
     ::fssd_25_8bit_v2_c_module_static_c
     ::fssd_25_8bit_v2_c_module_static_emitc
+    samples::risp4ml::pipeline::pipeline
     samples::util::util
   LINKOPTS
     "LINKER:--defsym=__stack_size__=100k"

samples/quant_model/fssd_25_8bit_v2.c

diff --git a/samples/quant_model/fssd_25_8bit_v2.c b/samples/quant_model/fssd_25_8bit_v2.c
index 7a272da..0ba243e 100644
--- a/samples/quant_model/fssd_25_8bit_v2.c
+++ b/samples/quant_model/fssd_25_8bit_v2.c
@@ -6,9 +6,11 @@
 
 #include "iree/base/api.h"
 #include "iree/hal/api.h"
+#include "samples/risp4ml/pipeline/pipeline.h"
 #include "samples/util/util.h"
 
 // Compiled module embedded here to avoid file IO:
+#include "samples/quant_model/fssd_quant_input_c.h"
 #if !defined(BUILD_EMITC)
 #include "samples/quant_model/fssd_25_8bit_v2_bytecode_module_static.h"
 #include "samples/quant_model/fssd_25_8bit_v2_bytecode_module_static_c.h"
@@ -60,13 +62,13 @@
 iree_status_t load_input_data(const MlModel *model, void **buffer,
                               iree_byte_span_t **byte_span) {
   iree_status_t result = alloc_input_buffer(model, buffer);
-  // Populate initial value
-  srand(11111111);
-  if (iree_status_is_ok(result)) {
-    for (int i = 0; i < model->input_length[0]; ++i) {
-      ((uint8_t *)*buffer)[i] = (uint8_t)rand();
-    }
-  }
+
+  ImageU8 input = {
+      .width = 640, .height = 480, .num_channels = 1, .data = fssd_quant_input};
+  ImageU8 output = {
+      .width = 320, .height = 320, .num_channels = 3, .data = buffer[0]};
+  isp_pipeline(&input, &output);
+
   byte_span[0] = malloc(sizeof(iree_byte_span_t));
   *byte_span[0] = iree_make_byte_span(
       buffer[0], model->input_size_bytes[0] * model->input_length[0]);