1 files changed, 40 insertions, 0 deletions
diff --git a/src/warp_prediction.h b/src/warp_prediction.h
new file mode 100644
index 0000000..6c86df3
--- /dev/null
+++ b/src/warp_prediction.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2019 The libgav1 Authors
+ *
+ * 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.
+ */
+
+#ifndef LIBGAV1_SRC_WARP_PREDICTION_H_
+#define LIBGAV1_SRC_WARP_PREDICTION_H_
+
+#include "src/obu_parser.h"
+#include "src/utils/constants.h"
+#include "src/utils/types.h"
+
+namespace libgav1 {
+
+// Sets the alpha, beta, gamma, delta fields in warp_params using the
+// warp_params->params array as input (only array entries at indexes 2, 3, 4,
+// 5 are used). Returns whether alpha, beta, gamma, delta are valid.
+bool SetupShear(GlobalMotion* warp_params);  // 7.11.3.6.
+
+// Computes local warp parameters by performing a least square fit.
+// Returns whether the computed parameters are valid.
+bool WarpEstimation(int num_samples, int block_width4x4, int block_height4x4,
+                    int row4x4, int column4x4, const MotionVector& mv,
+                    const int candidates[kMaxLeastSquaresSamples][4],
+                    GlobalMotion* warp_params);  // 7.11.3.8.
+
+}  // namespace libgav1
+
+#endif  // LIBGAV1_SRC_WARP_PREDICTION_H_