"use strict";
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/**
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* @license
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* Copyright 2018 Google Inc. All Rights Reserved.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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* =============================================================================
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*/
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Object.defineProperty(exports, "__esModule", { value: true });
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var LRNGradProgram = /** @class */ (function () {
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function LRNGradProgram(inputShape, depthRadius, bias, alpha, beta) {
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this.variableNames = ['inputImage', 'outputImage', 'dy'];
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this.outputShape = [];
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this.outputShape = inputShape;
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this.depth = inputShape[3];
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this.depthRadius = depthRadius;
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this.bias = bias;
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this.alpha = alpha;
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this.beta = beta;
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this.userCode = "\n void main() {\n ivec4 coords = getOutputCoords();\n int b = coords[0];\n int r = coords[1];\n int c = coords[2];\n\n float result = 0.0;\n for (int d = 0; d < " + this.depth + "; ++d) {\n int depthBegin = int(max(0.0, float(d - " + depthRadius + ")));\n int depthEnd = int(min(float(" + this.depth + "),\n float(d + " + depthRadius + " + 1)));\n\n const int MIN_DEPTH_BEGIN = 0;\n const int MAX_DEPTH_END = " + this.depth + ";\n\n float norm = 0.0;\n for (int k = MIN_DEPTH_BEGIN; k < MAX_DEPTH_END; ++k) {\n if (k < depthBegin){\n continue;\n }\n else if (k >= depthBegin && k < depthEnd) {\n norm += getInputImage(b, r, c, k) * getInputImage(b, r, c, k);\n }\n else {\n break;\n }\n }\n\n norm = float(" + alpha + ") * norm + float(" + bias + ");\n\n for(int k = MIN_DEPTH_BEGIN; k < MAX_DEPTH_END; ++k){\n if (k < depthBegin){\n continue;\n }\n else if (k >= depthBegin && k < depthEnd){\n float dyi = -2.0 * float(" + alpha + ")\n * float(" + beta + ")\n * getInputImage(b ,r ,c, k) * getOutputImage(b, r, c, d)\n / norm;\n if (k == d) {\n dyi += pow(norm, -1.0 * " + beta + ");\n }\n if (k == coords[3]) {\n dyi *= getDy(b, r, c, d);\n result += dyi;\n }\n }\n else {\n break;\n }\n }\n }\n setOutput(result);\n }\n ";
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}
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return LRNGradProgram;
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}());
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exports.LRNGradProgram = LRNGradProgram;
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//# sourceMappingURL=lrn_grad_gpu.js.map
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