[PATCH v4 08/18] libcamera: software_isp: Create algorithms

[Milan Zamazal]

We are ready to introduce algorithms now.  First, let's create
algorithms.  The algorithms are not called yet, calls to them will be
added in followup patches.

The maximum number of contexts is set to the same value as in hardware
pipelines.

Signed-off-by: Milan Zamazal <mzamazal at redhat.com>
Reviewed-by: Umang Jain <umang.jain at ideasonboard.com>
Reviewed-by: Daniel Scally <dan.scally at ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
---
 src/ipa/simple/algorithms/meson.build |  4 ++++
 src/ipa/simple/data/uncalibrated.yaml |  1 +
 src/ipa/simple/meson.build            |  7 +++++--
 src/ipa/simple/soft_simple.cpp        | 14 ++++++++++++++
 4 files changed, 24 insertions(+), 2 deletions(-)
 create mode 100644 src/ipa/simple/algorithms/meson.build

diff --git a/src/ipa/simple/algorithms/meson.build b/src/ipa/simple/algorithms/meson.build
new file mode 100644
index 00000000..31d26e43
--- /dev/null
+++ b/src/ipa/simple/algorithms/meson.build
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: CC0-1.0
+
+soft_simple_ipa_algorithms = files([
+])
diff --git a/src/ipa/simple/data/uncalibrated.yaml b/src/ipa/simple/data/uncalibrated.yaml
index ff981a1a..2cdc39a8 100644
--- a/src/ipa/simple/data/uncalibrated.yaml
+++ b/src/ipa/simple/data/uncalibrated.yaml
@@ -2,4 +2,5 @@
 %YAML 1.1
 ---
 version: 1
+algorithms:
 ...
diff --git a/src/ipa/simple/meson.build b/src/ipa/simple/meson.build
index 7757f99b..dcd7c70a 100644
--- a/src/ipa/simple/meson.build
+++ b/src/ipa/simple/meson.build
@@ -1,5 +1,8 @@
 # SPDX-License-Identifier: CC0-1.0
 
+subdir('algorithms')
+subdir('data')
+
 ipa_name = 'ipa_soft_simple'
 
 soft_simple_sources = files([
@@ -8,6 +11,8 @@ soft_simple_sources = files([
     'black_level.cpp',
 ])
 
+soft_simple_sources += soft_simple_ipa_algorithms
+
 mod = shared_module(ipa_name, soft_simple_sources,
                     name_prefix : '',
                     include_directories : [ipa_includes],
@@ -24,6 +29,4 @@ if ipa_sign_module
                   build_by_default : true)
 endif
 
-subdir('data')
-
 ipa_names += ipa_name
diff --git a/src/ipa/simple/soft_simple.cpp b/src/ipa/simple/soft_simple.cpp
index 12b5245e..79ed4891 100644
--- a/src/ipa/simple/soft_simple.cpp
+++ b/src/ipa/simple/soft_simple.cpp
@@ -54,12 +54,15 @@ static constexpr float kExposureOptimal = kExposureBinsCount / 2.0;
  * enough to prevent the exposure from wobbling around the optimal value.
  */
 static constexpr float kExposureSatisfactory = 0.2;
+/* Maximum number of frame contexts to be held */
+static constexpr uint32_t kMaxFrameContexts = 16;
 
 class IPASoftSimple : public ipa::soft::IPASoftInterface, public Module
 {
 public:
 	IPASoftSimple()
 		: params_(nullptr), stats_(nullptr), blackLevel_(BlackLevel()),
+		  context_({ {}, {}, { kMaxFrameContexts } }),
 		  ignoreUpdates_(0)
 	{
 	}
@@ -93,6 +96,8 @@ private:
 	static constexpr unsigned int kGammaLookupSize = 1024;
 	std::array<uint8_t, kGammaLookupSize> gammaTable_;
 	int lastBlackLevel_ = -1;
+	/* Local parameter storage */
+	struct IPAContext context_;
 
 	int32_t exposureMin_, exposureMax_;
 	int32_t exposure_;
@@ -139,6 +144,15 @@ int IPASoftSimple::init(const IPASettings &settings,
 	unsigned int version = (*data)["version"].get<uint32_t>(0);
 	LOG(IPASoft, Debug) << "Tuning file version " << version;
 
+	if (!data->contains("algorithms")) {
+		LOG(IPASoft, Error) << "Tuning file doesn't contain algorithms";
+		return -EINVAL;
+	}
+
+	int ret = createAlgorithms(context_, (*data)["algorithms"]);
+	if (ret)
+		return ret;
+
 	params_ = nullptr;
 	stats_ = nullptr;
 
-- 
2.44.1