Add FLAC.

tests/CMakeLists.txt

@@ -8,7 +8,13 @@ include_directories(${gtest_SOURCE_DIR}/include ${gtest_SOURCE_DIR})
 file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/data/random
      DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/data/)
 
+file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/data/flac.flac
+     DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/data/)
+
+file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/data/audio.bin
+     DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/data/)
+
 # 'Google_Tests_run' is the target name
 # 'test1.cpp tests2.cpp' are source files with tests
-add_executable(tests_run crc64.cpp spamsum.cpp)
+add_executable(tests_run crc64.cpp spamsum.cpp crc32.c crc32.h flac.cpp)
 target_link_libraries(tests_run gtest gtest_main "aaruformat")

tests/crc32.c

@@ -0,0 +1,53 @@
+/*
+ * This file is part of the Aaru Data Preservation Suite.
+ * Copyright (c) 2019-2022 Natalia Portillo.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+#include <stdint.h>
+
+#define CRC32_ISO_POLY 0xEDB88320
+#define CRC32_ISO_SEED 0xFFFFFFFF
+
+    uint32_t crc32_data(const uint8_t* data, uint32_t len)
+    {
+        uint32_t localHashInt = CRC32_ISO_SEED;
+        uint32_t localTable[256];
+        int      i, j;
+
+        for(i = 0; i < 256; i++)
+        {
+            uint32_t entry = (uint32_t)i;
+
+            for(j = 0; j < 8; j++)
+                if((entry & 1) == 1) entry = (entry >> 1) ^ CRC32_ISO_POLY;
+                else
+                    entry >>= 1;
+
+            localTable[i] = entry;
+        }
+
+        for(i = 0; i < len; i++) localHashInt = (localHashInt >> 8) ^ localTable[data[i] ^ (localHashInt & 0xff)];
+
+        localHashInt ^= CRC32_ISO_SEED;
+
+        return localHashInt;
+    }
+#ifdef __cplusplus
+}
+#endif

tests/crc32.h

@@ -0,0 +1,31 @@
+/*
+ * This file is part of the Aaru Data Preservation Suite.
+ * Copyright (c) 2019-2022 Natalia Portillo.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef LIBAARUFORMAT_TESTS_CRC32_H_
+#define LIBAARUFORMAT_TESTS_CRC32_H_
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    uint32_t crc32_data(const uint8_t* data, uint32_t len);
+#ifdef __cplusplus
+}
+#endif
+
+#endif // LIBAARUFORMAT_TESTS_CRC32_H_

tests/flac.cpp

@@ -0,0 +1,145 @@
+/*
+ * This file is part of the Aaru Data Preservation Suite.
+ * Copyright (c) 2019-2022 Natalia Portillo.
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of the
+ * License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <climits>
+#include <cstddef>
+#include <cstdint>
+
+#include <aaruformat.h>
+
+#include "../include/aaruformat/flac.h"
+#include "crc32.h"
+#include "gtest/gtest.h"
+
+#define EXPECTED_CRC32 0xdfbc99bb
+
+static const uint8_t* buffer;
+
+class flacFixture : public ::testing::Test
+{
+  public:
+    flacFixture()
+    {
+        // initialization;
+        // can also be done in SetUp()
+    }
+
+  protected:
+    void SetUp()
+    {
+        char path[PATH_MAX];
+        char filename[PATH_MAX];
+
+        getcwd(path, PATH_MAX);
+        snprintf(filename, PATH_MAX, "%s/data/flac.flac", path);
+
+        FILE* file = fopen(filename, "rb");
+        buffer     = (const uint8_t*)malloc(6534197);
+        fread((void*)buffer, 1, 6534197, file);
+        fclose(file);
+    }
+
+    void TearDown() { free((void*)buffer); }
+
+    ~flacFixture()
+    {
+        // resources cleanup, no exceptions allowed
+    }
+
+    // shared user data
+};
+
+TEST_F(flacFixture, flac)
+{
+    auto* outBuf = (uint8_t*)malloc(9633792);
+
+    auto decoded = aaruf_flac_decode_redbook_buffer(outBuf, 9633792, buffer, 6534197);
+
+    EXPECT_EQ(decoded, 9633792);
+
+    auto crc = crc32_data(outBuf, 9633792);
+
+    free(outBuf);
+
+    EXPECT_EQ(crc, EXPECTED_CRC32);
+}
+
+TEST_F(flacFixture, flacCompress)
+{
+    size_t         original_len = 9633792;
+    uint           cmp_len      = original_len;
+    uint           decmp_len    = original_len;
+    char           path[PATH_MAX];
+    char           filename[PATH_MAX * 2];
+    FILE*          file;
+    uint32_t       original_crc, decmp_crc;
+    const uint8_t* original;
+    uint8_t*       cmp_buffer;
+    uint8_t*       decmp_buffer;
+    size_t         newSize;
+
+    // Allocate buffers
+    original     = (const uint8_t*)malloc(original_len);
+    cmp_buffer   = (uint8_t*)malloc(cmp_len);
+    decmp_buffer = (uint8_t*)malloc(decmp_len);
+
+    // Read the file
+    getcwd(path, PATH_MAX);
+    snprintf(filename, PATH_MAX, "%s/data/audio.bin", path);
+
+    file = fopen(filename, "rb");
+    fread((void*)original, 1, original_len, file);
+    fclose(file);
+
+    // Calculate the CRC
+    original_crc = crc32_data(original, original_len);
+
+    // Compress
+    newSize = aaruf_flac_encode_redbook_buffer(cmp_buffer,
+                                               cmp_len,
+                                               original,
+                                               original_len,
+                                               4608,
+                                               1,
+                                               0,
+                                               "partial_tukey(0/1.0/1.0)",
+                                               12,
+                                               0,
+                                               1,
+                                               false,
+                                               0,
+                                               8,
+                                               "Aaru.Compression.Native.Tests",
+                                               strlen("Aaru.Compression.Native.Tests"));
+    cmp_len = newSize;
+
+    // Decompress
+    newSize   = aaruf_flac_decode_redbook_buffer(decmp_buffer, decmp_len, cmp_buffer, cmp_len);
+    decmp_len = newSize;
+
+    EXPECT_EQ(decmp_len, original_len);
+
+    decmp_crc = crc32_data(decmp_buffer, decmp_len);
+
+    // Free buffers
+    free((void*)original);
+    free(cmp_buffer);
+    free(decmp_buffer);
+
+    EXPECT_EQ(decmp_crc, original_crc);
+}