From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 19:32:43 +0200
Subject: Adding upstream version 1:115.7.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../jpeg-xl/lib/jxl/modular/encoding/encoding.h    | 135 +++++++++++++++++++++
 1 file changed, 135 insertions(+)
 create mode 100644 third_party/jpeg-xl/lib/jxl/modular/encoding/encoding.h

(limited to 'third_party/jpeg-xl/lib/jxl/modular/encoding/encoding.h')

diff --git a/third_party/jpeg-xl/lib/jxl/modular/encoding/encoding.h b/third_party/jpeg-xl/lib/jxl/modular/encoding/encoding.h
new file mode 100644
index 0000000000..89697bce87
--- /dev/null
+++ b/third_party/jpeg-xl/lib/jxl/modular/encoding/encoding.h
@@ -0,0 +1,135 @@
+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#ifndef LIB_JXL_MODULAR_ENCODING_ENCODING_H_
+#define LIB_JXL_MODULAR_ENCODING_ENCODING_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <vector>
+
+#include "lib/jxl/dec_ans.h"
+#include "lib/jxl/image.h"
+#include "lib/jxl/modular/encoding/context_predict.h"
+#include "lib/jxl/modular/encoding/dec_ma.h"
+#include "lib/jxl/modular/modular_image.h"
+#include "lib/jxl/modular/options.h"
+#include "lib/jxl/modular/transform/transform.h"
+
+namespace jxl {
+
+// Valid range of properties for using lookup tables instead of trees.
+constexpr int32_t kPropRangeFast = 512;
+
+struct GroupHeader : public Fields {
+  GroupHeader();
+
+  JXL_FIELDS_NAME(GroupHeader)
+
+  Status VisitFields(Visitor *JXL_RESTRICT visitor) override {
+    JXL_QUIET_RETURN_IF_ERROR(visitor->Bool(false, &use_global_tree));
+    JXL_QUIET_RETURN_IF_ERROR(visitor->VisitNested(&wp_header));
+    uint32_t num_transforms = static_cast<uint32_t>(transforms.size());
+    JXL_QUIET_RETURN_IF_ERROR(visitor->U32(Val(0), Val(1), BitsOffset(4, 2),
+                                           BitsOffset(8, 18), 0,
+                                           &num_transforms));
+    if (visitor->IsReading()) transforms.resize(num_transforms);
+    for (size_t i = 0; i < num_transforms; i++) {
+      JXL_QUIET_RETURN_IF_ERROR(visitor->VisitNested(&transforms[i]));
+    }
+    return true;
+  }
+
+  bool use_global_tree;
+  weighted::Header wp_header;
+
+  std::vector<Transform> transforms;
+};
+
+FlatTree FilterTree(const Tree &global_tree,
+                    std::array<pixel_type, kNumStaticProperties> &static_props,
+                    size_t *num_props, bool *use_wp, bool *wp_only,
+                    bool *gradient_only);
+
+template <typename T>
+bool TreeToLookupTable(const FlatTree &tree,
+                       T context_lookup[2 * kPropRangeFast],
+                       int8_t offsets[2 * kPropRangeFast],
+                       int8_t multipliers[2 * kPropRangeFast] = nullptr) {
+  struct TreeRange {
+    // Begin *excluded*, end *included*. This works best with > vs <= decision
+    // nodes.
+    int begin, end;
+    size_t pos;
+  };
+  std::vector<TreeRange> ranges;
+  ranges.push_back(TreeRange{-kPropRangeFast - 1, kPropRangeFast - 1, 0});
+  while (!ranges.empty()) {
+    TreeRange cur = ranges.back();
+    ranges.pop_back();
+    if (cur.begin < -kPropRangeFast - 1 || cur.begin >= kPropRangeFast - 1 ||
+        cur.end > kPropRangeFast - 1) {
+      // Tree is outside the allowed range, exit.
+      return false;
+    }
+    auto &node = tree[cur.pos];
+    // Leaf.
+    if (node.property0 == -1) {
+      if (node.predictor_offset < std::numeric_limits<int8_t>::min() ||
+          node.predictor_offset > std::numeric_limits<int8_t>::max()) {
+        return false;
+      }
+      if (node.multiplier < std::numeric_limits<int8_t>::min() ||
+          node.multiplier > std::numeric_limits<int8_t>::max()) {
+        return false;
+      }
+      if (multipliers == nullptr && node.multiplier != 1) {
+        return false;
+      }
+      for (int i = cur.begin + 1; i < cur.end + 1; i++) {
+        context_lookup[i + kPropRangeFast] = node.childID;
+        if (multipliers) multipliers[i + kPropRangeFast] = node.multiplier;
+        offsets[i + kPropRangeFast] = node.predictor_offset;
+      }
+      continue;
+    }
+    // > side of top node.
+    if (node.properties[0] >= kNumStaticProperties) {
+      ranges.push_back(TreeRange({node.splitvals[0], cur.end, node.childID}));
+      ranges.push_back(
+          TreeRange({node.splitval0, node.splitvals[0], node.childID + 1}));
+    } else {
+      ranges.push_back(TreeRange({node.splitval0, cur.end, node.childID}));
+    }
+    // <= side
+    if (node.properties[1] >= kNumStaticProperties) {
+      ranges.push_back(
+          TreeRange({node.splitvals[1], node.splitval0, node.childID + 2}));
+      ranges.push_back(
+          TreeRange({cur.begin, node.splitvals[1], node.childID + 3}));
+    } else {
+      ranges.push_back(
+          TreeRange({cur.begin, node.splitval0, node.childID + 2}));
+    }
+  }
+  return true;
+}
+// TODO(veluca): make cleaner interfaces.
+
+Status ValidateChannelDimensions(const Image &image,
+                                 const ModularOptions &options);
+
+Status ModularGenericDecompress(BitReader *br, Image &image,
+                                GroupHeader *header, size_t group_id,
+                                ModularOptions *options,
+                                bool undo_transforms = true,
+                                const Tree *tree = nullptr,
+                                const ANSCode *code = nullptr,
+                                const std::vector<uint8_t> *ctx_map = nullptr,
+                                bool allow_truncated_group = false);
+}  // namespace jxl
+
+#endif  // LIB_JXL_MODULAR_ENCODING_ENCODING_H_
-- 
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