@tensorflow/tfjs-core
Version:
Hardware-accelerated JavaScript library for machine intelligence
136 lines • 16.4 kB
JavaScript
/**
* @license
* Copyright 2018 Google LLC. All Rights Reserved.
* 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.
* =============================================================================
*/
/**
* Merges real and imaginary Float32Arrays into a single complex Float32Array.
*
* The memory layout is interleaved as follows:
* real: [r0, r1, r2]
* imag: [i0, i1, i2]
* complex: [r0, i0, r1, i1, r2, i2]
*
* This is the inverse of splitRealAndImagArrays.
*
* @param real The real values of the complex tensor values.
* @param imag The imag values of the complex tensor values.
* @returns A complex tensor as a Float32Array with merged values.
*/
export function mergeRealAndImagArrays(real, imag) {
if (real.length !== imag.length) {
throw new Error(`Cannot merge real and imag arrays of different lengths. real:` +
`${real.length}, imag: ${imag.length}.`);
}
const result = new Float32Array(real.length * 2);
for (let i = 0; i < result.length; i += 2) {
result[i] = real[i / 2];
result[i + 1] = imag[i / 2];
}
return result;
}
/**
* Splits a complex Float32Array into real and imag parts.
*
* The memory layout is interleaved as follows:
* complex: [r0, i0, r1, i1, r2, i2]
* real: [r0, r1, r2]
* imag: [i0, i1, i2]
*
* This is the inverse of mergeRealAndImagArrays.
*
* @param complex The complex tensor values.
* @returns An object with real and imag Float32Array components of the complex
* tensor.
*/
export function splitRealAndImagArrays(complex) {
const real = new Float32Array(complex.length / 2);
const imag = new Float32Array(complex.length / 2);
for (let i = 0; i < complex.length; i += 2) {
real[i / 2] = complex[i];
imag[i / 2] = complex[i + 1];
}
return { real, imag };
}
/**
* Extracts even indexed complex values in the given array.
* @param complex The complex tensor values
*/
export function complexWithEvenIndex(complex) {
const len = Math.ceil(complex.length / 4);
const real = new Float32Array(len);
const imag = new Float32Array(len);
for (let i = 0; i < complex.length; i += 4) {
real[Math.floor(i / 4)] = complex[i];
imag[Math.floor(i / 4)] = complex[i + 1];
}
return { real, imag };
}
/**
* Extracts odd indexed complete values in the given array.
* @param complex The complex tensor values
*/
export function complexWithOddIndex(complex) {
const len = Math.floor(complex.length / 4);
const real = new Float32Array(len);
const imag = new Float32Array(len);
for (let i = 2; i < complex.length; i += 4) {
real[Math.floor(i / 4)] = complex[i];
imag[Math.floor(i / 4)] = complex[i + 1];
}
return { real, imag };
}
/**
* Get the map representing a complex value in the given array.
* @param complex The complex tensor values.
* @param index An index of the target complex value.
*/
export function getComplexWithIndex(complex, index) {
const real = complex[index * 2];
const imag = complex[index * 2 + 1];
return { real, imag };
}
/**
* Insert a given complex value into the TypedArray.
* @param data The array in which the complex value is inserted.
* @param c The complex value to be inserted.
* @param index An index of the target complex value.
*/
export function assignToTypedArray(data, real, imag, index) {
data[index * 2] = real;
data[index * 2 + 1] = imag;
}
/**
* Make the list of exponent terms used by FFT.
*/
export function exponents(n, inverse) {
const real = new Float32Array(n / 2);
const imag = new Float32Array(n / 2);
for (let i = 0; i < Math.ceil(n / 2); i++) {
const x = (inverse ? 2 : -2) * Math.PI * (i / n);
real[i] = Math.cos(x);
imag[i] = Math.sin(x);
}
return { real, imag };
}
/**
* Make the exponent term used by FFT.
*/
export function exponent(k, n, inverse) {
const x = (inverse ? 2 : -2) * Math.PI * (k / n);
const real = Math.cos(x);
const imag = Math.sin(x);
return { real, imag };
}
//# sourceMappingURL=data:application/json;base64,{"version":3,"file":"complex_util.js","sourceRoot":"","sources":["../../../../../../tfjs-core/src/backends/complex_util.ts"],"names":[],"mappings":"AAAA;;;;;;;;;;;;;;;GAeG;AAGH;;;;;;;;;;;;;GAaG;AACH,MAAM,UAAU,sBAAsB,CAClC,IAAkB,EAAE,IAAkB;IACxC,IAAI,IAAI,CAAC,MAAM,KAAK,IAAI,CAAC,MAAM,EAAE;QAC/B,MAAM,IAAI,KAAK,CACX,+DAA+D;YAC/D,GAAG,IAAI,CAAC,MAAM,WAAW,IAAI,CAAC,MAAM,GAAG,CAAC,CAAC;KAC9C;IACD,MAAM,MAAM,GAAG,IAAI,YAAY,CAAC,IAAI,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC;IACjD,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,MAAM,CAAC,MAAM,EAAE,CAAC,IAAI,CAAC,EAAE;QACzC,MAAM,CAAC,CAAC,CAAC,GAAG,IAAI,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;QACxB,MAAM,CAAC,CAAC,GAAG,CAAC,CAAC,GAAG,IAAI,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;KAC7B;IACD,OAAO,MAAM,CAAC;AAChB,CAAC;AAED;;;;;;;;;;;;;GAaG;AACH,MAAM,UAAU,sBAAsB,CAAC,OAAqB;IAE1D,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,OAAO,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC;IAClD,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,OAAO,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC;IAClD,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC,IAAI,CAAC,EAAE;QAC1C,IAAI,CAAC,CAAC,GAAG,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;QACzB,IAAI,CAAC,CAAC,GAAG,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;KAC9B;IACD,OAAO,EAAC,IAAI,EAAE,IAAI,EAAC,CAAC;AACtB,CAAC;AAED;;;GAGG;AACH,MAAM,UAAU,oBAAoB,CAAC,OAAqB;IAExD,MAAM,GAAG,GAAG,IAAI,CAAC,IAAI,CAAC,OAAO,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC;IAC1C,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,GAAG,CAAC,CAAC;IACnC,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,GAAG,CAAC,CAAC;IACnC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC,IAAI,CAAC,EAAE;QAC1C,IAAI,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;QACrC,IAAI,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;KAC1C;IACD,OAAO,EAAC,IAAI,EAAE,IAAI,EAAC,CAAC;AACtB,CAAC;AAED;;;GAGG;AACH,MAAM,UAAU,mBAAmB,CAAC,OAAqB;IAEvD,MAAM,GAAG,GAAG,IAAI,CAAC,KAAK,CAAC,OAAO,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC;IAC3C,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,GAAG,CAAC,CAAC;IACnC,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,GAAG,CAAC,CAAC;IACnC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,OAAO,CAAC,MAAM,EAAE,CAAC,IAAI,CAAC,EAAE;QAC1C,IAAI,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,CAAC,CAAC;QACrC,IAAI,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC,GAAG,OAAO,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;KAC1C;IACD,OAAO,EAAC,IAAI,EAAE,IAAI,EAAC,CAAC;AACtB,CAAC;AAED;;;;GAIG;AACH,MAAM,UAAU,mBAAmB,CAC/B,OAAqB,EAAE,KAAa;IACtC,MAAM,IAAI,GAAG,OAAO,CAAC,KAAK,GAAG,CAAC,CAAC,CAAC;IAChC,MAAM,IAAI,GAAG,OAAO,CAAC,KAAK,GAAG,CAAC,GAAG,CAAC,CAAC,CAAC;IACpC,OAAO,EAAC,IAAI,EAAE,IAAI,EAAC,CAAC;AACtB,CAAC;AAED;;;;;GAKG;AACH,MAAM,UAAU,kBAAkB,CAC9B,IAAgB,EAAE,IAAY,EAAE,IAAY,EAAE,KAAa;IAC7D,IAAI,CAAC,KAAK,GAAG,CAAC,CAAC,GAAG,IAAI,CAAC;IACvB,IAAI,CAAC,KAAK,GAAG,CAAC,GAAG,CAAC,CAAC,GAAG,IAAI,CAAC;AAC7B,CAAC;AAED;;GAEG;AACH,MAAM,UAAU,SAAS,CACrB,CAAS,EAAE,OAAgB;IAC7B,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;IACrC,MAAM,IAAI,GAAG,IAAI,YAAY,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;IACrC,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,IAAI,CAAC,IAAI,CAAC,CAAC,GAAG,CAAC,CAAC,EAAE,CAAC,EAAE,EAAE;QACzC,MAAM,CAAC,GAAG,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAG,IAAI,CAAC,EAAE,GAAG,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;QACjD,IAAI,CAAC,CAAC,CAAC,GAAG,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;QACtB,IAAI,CAAC,CAAC,CAAC,GAAG,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;KACvB;IACD,OAAO,EAAC,IAAI,EAAE,IAAI,EAAC,CAAC;AACtB,CAAC;AAED;;GAEG;AACH,MAAM,UAAU,QAAQ,CACpB,CAAS,EAAE,CAAS,EAAE,OAAgB;IACxC,MAAM,CAAC,GAAG,CAAC,OAAO,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,GAAG,IAAI,CAAC,EAAE,GAAG,CAAC,CAAC,GAAG,CAAC,CAAC,CAAC;IACjD,MAAM,IAAI,GAAG,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;IACzB,MAAM,IAAI,GAAG,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC,CAAC;IACzB,OAAO,EAAC,IAAI,EAAE,IAAI,EAAC,CAAC;AACtB,CAAC","sourcesContent":["/**\n * @license\n * Copyright 2018 Google LLC. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport {TypedArray} from '../types';\n/**\n * Merges real and imaginary Float32Arrays into a single complex Float32Array.\n *\n * The memory layout is interleaved as follows:\n * real: [r0, r1, r2]\n * imag: [i0, i1, i2]\n * complex: [r0, i0, r1, i1, r2, i2]\n *\n * This is the inverse of splitRealAndImagArrays.\n *\n * @param real The real values of the complex tensor values.\n * @param imag The imag values of the complex tensor values.\n * @returns A complex tensor as a Float32Array with merged values.\n */\nexport function mergeRealAndImagArrays(\n    real: Float32Array, imag: Float32Array): Float32Array {\n  if (real.length !== imag.length) {\n    throw new Error(\n        `Cannot merge real and imag arrays of different lengths. real:` +\n        `${real.length}, imag: ${imag.length}.`);\n  }\n  const result = new Float32Array(real.length * 2);\n  for (let i = 0; i < result.length; i += 2) {\n    result[i] = real[i / 2];\n    result[i + 1] = imag[i / 2];\n  }\n  return result;\n}\n\n/**\n * Splits a complex Float32Array into real and imag parts.\n *\n * The memory layout is interleaved as follows:\n * complex: [r0, i0, r1, i1, r2, i2]\n * real: [r0, r1, r2]\n * imag: [i0, i1, i2]\n *\n * This is the inverse of mergeRealAndImagArrays.\n *\n * @param complex The complex tensor values.\n * @returns An object with real and imag Float32Array components of the complex\n *     tensor.\n */\nexport function splitRealAndImagArrays(complex: Float32Array):\n    {real: Float32Array, imag: Float32Array} {\n  const real = new Float32Array(complex.length / 2);\n  const imag = new Float32Array(complex.length / 2);\n  for (let i = 0; i < complex.length; i += 2) {\n    real[i / 2] = complex[i];\n    imag[i / 2] = complex[i + 1];\n  }\n  return {real, imag};\n}\n\n/**\n * Extracts even indexed complex values in the given array.\n * @param complex The complex tensor values\n */\nexport function complexWithEvenIndex(complex: Float32Array):\n    {real: Float32Array, imag: Float32Array} {\n  const len = Math.ceil(complex.length / 4);\n  const real = new Float32Array(len);\n  const imag = new Float32Array(len);\n  for (let i = 0; i < complex.length; i += 4) {\n    real[Math.floor(i / 4)] = complex[i];\n    imag[Math.floor(i / 4)] = complex[i + 1];\n  }\n  return {real, imag};\n}\n\n/**\n * Extracts odd indexed complete values in the given array.\n * @param complex The complex tensor values\n */\nexport function complexWithOddIndex(complex: Float32Array):\n    {real: Float32Array, imag: Float32Array} {\n  const len = Math.floor(complex.length / 4);\n  const real = new Float32Array(len);\n  const imag = new Float32Array(len);\n  for (let i = 2; i < complex.length; i += 4) {\n    real[Math.floor(i / 4)] = complex[i];\n    imag[Math.floor(i / 4)] = complex[i + 1];\n  }\n  return {real, imag};\n}\n\n/**\n * Get the map representing a complex value in the given array.\n * @param complex The complex tensor values.\n * @param index An index of the target complex value.\n */\nexport function getComplexWithIndex(\n    complex: Float32Array, index: number): {real: number, imag: number} {\n  const real = complex[index * 2];\n  const imag = complex[index * 2 + 1];\n  return {real, imag};\n}\n\n/**\n * Insert a given complex value into the TypedArray.\n * @param data The array in which the complex value is inserted.\n * @param c The complex value to be inserted.\n * @param index An index of the target complex value.\n */\nexport function assignToTypedArray(\n    data: TypedArray, real: number, imag: number, index: number) {\n  data[index * 2] = real;\n  data[index * 2 + 1] = imag;\n}\n\n/**\n * Make the list of exponent terms used by FFT.\n */\nexport function exponents(\n    n: number, inverse: boolean): {real: Float32Array, imag: Float32Array} {\n  const real = new Float32Array(n / 2);\n  const imag = new Float32Array(n / 2);\n  for (let i = 0; i < Math.ceil(n / 2); i++) {\n    const x = (inverse ? 2 : -2) * Math.PI * (i / n);\n    real[i] = Math.cos(x);\n    imag[i] = Math.sin(x);\n  }\n  return {real, imag};\n}\n\n/**\n * Make the exponent term used by FFT.\n */\nexport function exponent(\n    k: number, n: number, inverse: boolean): {real: number, imag: number} {\n  const x = (inverse ? 2 : -2) * Math.PI * (k / n);\n  const real = Math.cos(x);\n  const imag = Math.sin(x);\n  return {real, imag};\n}\n"]}