1 files changed, 73 insertions, 0 deletions
diff --git a/libhwc2.1/libdevice/HistogramController.cpp b/libhwc2.1/libdevice/HistogramController.cpp
new file mode 100644
index 0000000..6cf6f78
--- /dev/null
+++ b/libhwc2.1/libdevice/HistogramController.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#include "HistogramController.h"
+
+void HistogramController::initPlatformHistogramCapability() {
+    mHistogramCapability.supportSamplePosList.push_back(HistogramSamplePos::PRE_POSTPROC);
+    mHistogramCapability.supportBlockingRoi = true;
+}
+
+// TODO: b/295990513 - Remove the if defined after kernel prebuilts are merged.
+#if defined(EXYNOS_HISTOGRAM_CHANNEL_REQUEST)
+int HistogramController::createHistogramDrmConfigLocked(const ChannelInfo& channel,
+                                                        std::shared_ptr<void>& configPtr,
+                                                        size_t& length) const {
+    configPtr = std::make_shared<struct histogram_channel_config>();
+    struct histogram_channel_config* channelConfig =
+            (struct histogram_channel_config*)configPtr.get();
+
+    if (channelConfig == nullptr) {
+        ALOGE("%s: histogram failed to allocate histogram_channel_config", __func__);
+        return NO_MEMORY;
+    }
+
+    channelConfig->roi.start_x = channel.workingConfig.roi.left;
+    channelConfig->roi.start_y = channel.workingConfig.roi.top;
+    channelConfig->roi.hsize = channel.workingConfig.roi.right - channel.workingConfig.roi.left;
+    channelConfig->roi.vsize = channel.workingConfig.roi.bottom - channel.workingConfig.roi.top;
+    if (channel.workingConfig.blockingRoi.has_value() &&
+        channel.workingConfig.blockingRoi.value() != DISABLED_ROI) {
+        const HistogramRoiRect& blockedRoi = channel.workingConfig.blockingRoi.value();
+        channelConfig->flags |= HISTOGRAM_FLAGS_BLOCKED_ROI;
+        channelConfig->blocked_roi.start_x = blockedRoi.left;
+        channelConfig->blocked_roi.start_y = blockedRoi.top;
+        channelConfig->blocked_roi.hsize = blockedRoi.right - blockedRoi.left;
+        channelConfig->blocked_roi.vsize = blockedRoi.bottom - blockedRoi.top;
+    } else {
+        channelConfig->flags &= ~HISTOGRAM_FLAGS_BLOCKED_ROI;
+    }
+    channelConfig->weights.weight_r = channel.workingConfig.weights.weightR;
+    channelConfig->weights.weight_g = channel.workingConfig.weights.weightG;
+    channelConfig->weights.weight_b = channel.workingConfig.weights.weightB;
+    channelConfig->pos = (channel.workingConfig.samplePos == HistogramSamplePos::POST_POSTPROC)
+            ? POST_DQE
+            : PRE_DQE;
+    channelConfig->threshold = channel.threshold;
+
+    length = sizeof(struct histogram_channel_config);
+
+    return NO_ERROR;
+}
+
+int HistogramController::parseDrmEvent(void* event, uint8_t& channelId, char16_t*& buffer) const {
+    struct exynos_drm_histogram_channel_event* histogram_channel_event =
+            (struct exynos_drm_histogram_channel_event*)event;
+    channelId = histogram_channel_event->hist_id;
+    buffer = (char16_t*)&histogram_channel_event->bins;
+    return NO_ERROR;
+}
+#endif