Disabled external gits
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cs440-acg/ext/openexr/OpenEXR/IlmImfTest/testHuf.cpp
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cs440-acg/ext/openexr/OpenEXR/IlmImfTest/testHuf.cpp
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///////////////////////////////////////////////////////////////////////////
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//
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// Copyright (c) 2002-2012, Industrial Light & Magic, a division of Lucas
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// Digital Ltd. LLC
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Industrial Light & Magic nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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///////////////////////////////////////////////////////////////////////////
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#include <ImfHuf.h>
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#include "ImathRandom.h"
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#include <ImfArray.h>
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#include <iostream>
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#include <exception>
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#include <limits.h>
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#include <math.h>
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#include <stdlib.h>
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#include <assert.h>
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using namespace OPENEXR_IMF_NAMESPACE;
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using namespace std;
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namespace {
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void
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fill1 (unsigned short data[/*n*/], int n, float bias, IMATH_NAMESPACE::Rand48 & rand48)
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{
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for (int i = 0; i < n; ++i)
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data[i] = (unsigned short)
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(pow (rand48.nextf(), double(bias)) * (USHRT_MAX + 1));
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}
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void
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fill2 (unsigned short data[/*n*/], int n, int m, IMATH_NAMESPACE::Rand48 & rand48)
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{
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for (int i = 0; i < n; ++i)
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data[i] = 0;
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for (int i = 0; i < m; ++i)
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data[rand48.nexti() % n] = (unsigned short) (rand48.nextf() * (USHRT_MAX + 1));
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}
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void
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fill3 (unsigned short data[/*n*/], int n, int m)
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{
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for (int i = 0; i < n; ++i)
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data[i] = m;
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}
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void
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fill4 (unsigned short data[/*n*/], int n)
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{
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for (int i = 0; i < n; ++i)
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data[i] = i & USHRT_MAX;
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}
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void
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fill5 (unsigned short data[/*n*/], int n)
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{
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for (int i = 0; i < n; ++i)
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data[i] = 0;
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int j = 0, k = 0;
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for (int i = 0; i < n; ++i)
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{
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data[i] = j;
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j = j + k;
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k = k + 1;
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if (j > USHRT_MAX)
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break;
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}
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}
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void
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compressUncompress (const unsigned short raw[], int n)
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{
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Array <char> compressed (3 * n + 4 * 65536);
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Array <unsigned short> uncompressed (n);
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cout << "compressing " << flush;
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int nCompressed = hufCompress (raw, n, compressed);
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cout << "uncompressing " << flush;
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hufUncompress (compressed, nCompressed, uncompressed, n);
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cout << "comparing: " << flush;
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for (int i = 0; i < n; ++i)
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assert (uncompressed[i] == raw[i]);
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cout << sizeof (raw[0]) * n << " bytes, compressed " <<
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nCompressed << " bytes" << endl;
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}
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void
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compressUncompressSubset(const unsigned short raw[], int n)
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{
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// Test various subsets of the data set
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Array <char> compressed (3 * n + 4 * 65536);
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Array <unsigned short> uncompressed (n);
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int maxOffset = 16;
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if (n <= maxOffset) {
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maxOffset = n-1;
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}
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for (int offset=1; offset<maxOffset; ++offset) {
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int maxLength = n - offset;
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int minLength = maxLength - 16;
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if (minLength < 1) minLength = 1;
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for (int length=minLength; length<=maxLength; ++length) {
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cout << "compressing " << flush;
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int nCompressed = hufCompress (raw + offset, length, compressed + offset);
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cout << "uncompressing " << flush;
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hufUncompress (compressed + offset, nCompressed, uncompressed + offset, length);
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for (int i = 0; i < length; ++i)
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assert (uncompressed[offset+i] == raw[offset+i]);
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cout << sizeof (raw[0]) * length << " bytes, compressed " << nCompressed << " bytes ";
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cout << "(+" << offset << ",-" << n-offset-length << ")" << endl;
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}
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}
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}
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} // namespace
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void
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testHuf (const std::string&)
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{
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try
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{
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cout << "Testing Huffman encoder" << endl;
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IMATH_NAMESPACE::Rand48 rand48 (0);
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const int N = 1000000;
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Array <unsigned short> raw (N);
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fill1 (raw, N, 1, rand48); // test various symbol distributions
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill1 (raw, N, 10, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill1 (raw, N, 100, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill1 (raw, N, 1000, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill2 (raw, N, 1, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill2 (raw, N, 10, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill2 (raw, N, 100, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill2 (raw, N, 1000, rand48);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill3 (raw, N, 0);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill3 (raw, N, 1);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill3 (raw, N, USHRT_MAX - 1);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill3 (raw, N, USHRT_MAX);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill4 (raw, USHRT_MAX + 1);
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compressUncompress (raw, USHRT_MAX + 1);
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compressUncompressSubset (raw, USHRT_MAX + 1);
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fill4 (raw, N);
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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fill4 (raw, 0);
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compressUncompress (raw, 0); // test small input data sets
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fill4 (raw, 1);
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compressUncompress (raw, 1);
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fill4 (raw, 2);
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compressUncompress (raw, 2);
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fill4 (raw, 3);
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compressUncompress (raw, 3);
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fill5 (raw, N); // test run-length coding of code table
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compressUncompress (raw, N);
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compressUncompressSubset (raw, N);
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cout << "ok\n" << endl;
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}
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catch (const std::exception &e)
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{
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cerr << "ERROR -- caught exception: " << e.what() << endl;
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assert (false);
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}
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}
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