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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <stdlib.h> | |
| 6 | |
| 7 #include "remoting/base/compressor_zlib.h" | |
| 8 #include "remoting/base/decompressor_zlib.h" | |
| 9 #include "testing/gtest/include/gtest/gtest.h" | |
| 10 | |
| 11 namespace remoting { | |
| 12 | |
| 13 static void GenerateTestData(uint8* data, int size, int seed) { | |
| 14 srand(seed); | |
| 15 for (int i = 0; i < size; ++i) | |
| 16 data[i] = rand() % 256; | |
| 17 } | |
| 18 | |
| 19 // Keep compressing |input_data| into |output_data| until the last | |
| 20 // bytes is consumed. | |
| 21 // | |
| 22 // The compressed size is written to |compressed_size|. | |
| 23 static void Compress(remoting::Compressor* compressor, | |
| 24 const uint8* input_data, int input_size, | |
| 25 uint8* output_data, int output_size, | |
| 26 int* compressed_size) { | |
| 27 *compressed_size = 0; | |
| 28 while (true) { | |
| 29 int consumed, written; | |
| 30 bool ret = compressor->Process( | |
| 31 input_data, input_size, output_data, output_size, | |
| 32 input_size == 0 ? | |
| 33 Compressor::CompressorFinish : Compressor::CompressorNoFlush, | |
| 34 &consumed, &written); | |
| 35 input_data += consumed; | |
| 36 input_size -= consumed; | |
| 37 output_data += written; | |
| 38 output_size -= written; | |
| 39 *compressed_size += written; | |
| 40 | |
| 41 if (!ret) | |
| 42 break; | |
| 43 } | |
| 44 } | |
| 45 | |
| 46 // The decompressed size is written to |decompressed_size|. | |
| 47 static void Decompress(remoting::Decompressor* decompressor, | |
| 48 const uint8* input_data, int input_size, | |
| 49 uint8* output_data, int output_size, | |
| 50 int* decompressed_size) { | |
| 51 *decompressed_size = 0; | |
| 52 while (true) { | |
| 53 int consumed, written; | |
| 54 bool ret = decompressor->Process(input_data, input_size, | |
| 55 output_data, output_size, | |
| 56 &consumed, &written); | |
| 57 input_data += consumed; | |
| 58 input_size -= consumed; | |
| 59 output_data += written; | |
| 60 output_size -= written; | |
| 61 *decompressed_size += written; | |
| 62 | |
| 63 if (!ret) | |
| 64 break; | |
| 65 } | |
| 66 } | |
| 67 | |
| 68 TEST(DecompressorZlibTest, CompressAndDecompress) { | |
| 69 static const int kRawDataSize = 1024 * 128; | |
| 70 static const int kCompressedDataSize = 2 * kRawDataSize; | |
| 71 static const int kDecompressedDataSize = kRawDataSize; | |
| 72 | |
| 73 uint8 raw_data[kRawDataSize]; | |
| 74 uint8 compressed_data[kCompressedDataSize]; | |
| 75 uint8 decompressed_data[kDecompressedDataSize]; | |
| 76 | |
| 77 // Generate the test data.g | |
| 78 GenerateTestData(raw_data, kRawDataSize, 99); | |
| 79 | |
| 80 // Then use the compressor. | |
| 81 remoting::CompressorZlib compressor; | |
| 82 int compressed_size = 0; | |
| 83 Compress(&compressor, raw_data, kRawDataSize, | |
| 84 compressed_data, kCompressedDataSize, | |
| 85 &compressed_size); | |
| 86 | |
| 87 // Then use the decompressor. | |
| 88 remoting::DecompressorZlib decompressor; | |
| 89 int decompressed_size = 0; | |
| 90 Decompress(&decompressor, compressed_data, compressed_size, | |
| 91 decompressed_data, kDecompressedDataSize, | |
| 92 &decompressed_size); | |
| 93 | |
| 94 EXPECT_EQ(kRawDataSize, decompressed_size); | |
| 95 EXPECT_EQ(0, memcmp(raw_data, decompressed_data, decompressed_size)); | |
| 96 } | |
| 97 | |
| 98 // Checks that zlib can work with a small output buffer by limiting | |
| 99 // number of bytes it gets from the input. | |
| 100 TEST(DecompressorZlibTest, SmallOutputBuffer) { | |
| 101 static const int kRawDataSize = 1024 * 128; | |
| 102 static const int kCompressedDataSize = 2 * kRawDataSize; | |
| 103 | |
| 104 uint8 raw_data[kRawDataSize]; | |
| 105 uint8 compressed_data[kCompressedDataSize]; | |
| 106 | |
| 107 // Generate the test data. | |
| 108 GenerateTestData(raw_data, kRawDataSize, 99); | |
| 109 | |
| 110 // Then use the compressor to compress. | |
| 111 remoting::CompressorZlib compressor; | |
| 112 int compressed_size = 0; | |
| 113 Compress(&compressor, raw_data, kRawDataSize, | |
| 114 compressed_data, kCompressedDataSize, | |
| 115 &compressed_size); | |
| 116 | |
| 117 // Then use the decompressor. We decompress into a 1 byte buffer | |
| 118 // every time. | |
| 119 remoting::DecompressorZlib decompressor; | |
| 120 uint8* input_data = compressed_data; | |
| 121 int input_size = compressed_size; | |
| 122 int decompressed_size = 0; | |
| 123 while (true) { | |
| 124 int consumed, written; | |
| 125 uint8 output_data; | |
| 126 bool ret = decompressor.Process(input_data, input_size, | |
| 127 &output_data, 1, | |
| 128 &consumed, &written); | |
| 129 input_data += consumed; | |
| 130 input_size -= consumed; | |
| 131 | |
| 132 // Expect that there's only one byte written. | |
| 133 EXPECT_EQ(1, written); | |
| 134 decompressed_size += written; | |
| 135 | |
| 136 if (!ret) | |
| 137 break; | |
| 138 } | |
| 139 EXPECT_EQ(kRawDataSize, decompressed_size); | |
| 140 } | |
| 141 | |
| 142 } // namespace remoting | |
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Chromium Code Reviews
Issue 11195029:
Remove ZLib codec support from chromoting host and client. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src