Add Apple ADC algorithm.

tests/adc.cpp

@@ -0,0 +1,79 @@
+/*
+ * This file is part of the Aaru Data Preservation Suite.
+ * Copyright (c) 2019-2021 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 <cstdint>
+#include <cstring>
+
+#include "../library.h"
+#include "../adc.h"
+#include "crc32.h"
+#include "gtest/gtest.h"
+
+#define EXPECTED_CRC32 0x5a5a7388
+
+static const uint8_t* buffer;
+
+class adcFixture : public ::testing::Test
+{
+  public:
+    adcFixture()
+    {
+        // 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/adc.bin", path);
+
+        FILE* file = fopen(filename, "rb");
+        buffer     = (const uint8_t*)malloc(34367);
+        fread((void*)buffer, 1, 34367, file);
+        fclose(file);
+    }
+
+    void TearDown() { free((void*)buffer); }
+
+    ~adcFixture()
+    {
+        // resources cleanup, no exceptions allowed
+    }
+
+    // shared user data
+};
+
+TEST_F(adcFixture, adc)
+{
+    auto* outBuf = (uint8_t*)malloc(327680);
+
+    auto decoded = adc_decode_buffer(outBuf, 327680, buffer, 34367);
+
+    EXPECT_EQ(decoded, 262144);
+
+    auto crc = crc32_data(outBuf, 262144);
+
+    free(outBuf);
+
+    EXPECT_EQ(crc, EXPECTED_CRC32);
+}