1 files changed, 301 insertions, 0 deletions
diff --git a/Source/Core/DolphinTool/ConvertCommand.cpp b/Source/Core/DolphinTool/ConvertCommand.cpp
new file mode 100644
index 0000000000..ca270e9d12
--- /dev/null
+++ b/Source/Core/DolphinTool/ConvertCommand.cpp
@@ -0,0 +1,301 @@
+// Copyright 2021 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "DolphinTool/ConvertCommand.h"
+
+#include <OptionParser.h>
+
+namespace DolphinTool
+{
+int ConvertCommand::Main(const std::vector<std::string>& args)
+{
+  auto parser = std::make_unique<optparse::OptionParser>();
+
+  parser->usage("usage: convert [options]... [FILE]...");
+
+  parser->add_option("-i", "--input")
+      .type("string")
+      .action("store")
+      .help("Path to disc image FILE.")
+      .metavar("FILE");
+
+  parser->add_option("-o", "--output")
+      .type("string")
+      .action("store")
+      .help("Path to the destination FILE.")
+      .metavar("FILE");
+
+  parser->add_option("-f", "--format")
+      .type("string")
+      .action("store")
+      .help("Container format to use. Default is RVZ. [%choices]")
+      .choices({"iso", "gcz", "wia", "rvz"});
+
+  parser->add_option("-s", "--scrub")
+      .action("store_true")
+      .help("Scrub junk data as part of conversion.");
+
+  parser->add_option("-b", "--block_size")
+      .type("int")
+      .action("store")
+      .help("Block size for GCZ/WIA/RVZ formats, as an integer. Suggested value for RVZ: 131072 "
+            "(128 KiB)");
+
+  parser->add_option("-c", "--compression")
+      .type("string")
+      .action("store")
+      .help("Compression method to use when converting to WIA/RVZ. Suggested value for RVZ: zstd "
+            "[%choices]")
+      .choices({"none", "zstd", "bzip", "lzma", "lzma2"});
+
+  parser->add_option("-l", "--compression_level")
+      .type("int")
+      .action("store")
+      .help("Level of compression for the selected method. Ignored if 'none'. Suggested value for "
+            "zstd: 5");
+
+  const optparse::Values& options = parser->parse_args(args);
+
+  // Validate options
+
+  // --input
+  const std::string input_file_path = static_cast<const char*>(options.get("input"));
+  if (input_file_path.empty())
+  {
+    std::cerr << "Error: No input set" << std::endl;
+    return 1;
+  }
+
+  // --output
+  const std::string output_file_path = static_cast<const char*>(options.get("output"));
+  if (output_file_path.empty())
+  {
+    std::cerr << "Error: No output set" << std::endl;
+    return 1;
+  }
+
+  // --format
+  const std::optional<DiscIO::BlobType> format_o =
+      ParseFormatString(static_cast<const char*>(options.get("format")));
+  if (!format_o.has_value())
+  {
+    std::cerr << "Error: No output format set" << std::endl;
+    return 1;
+  }
+  const DiscIO::BlobType format = format_o.value();
+
+  // Open the volume now for inspection
+  std::unique_ptr<DiscIO::Volume> volume = DiscIO::CreateVolume(input_file_path);
+  if (!volume)
+  {
+    std::cerr << "Error: Unable to open disc image" << std::endl;
+    return 1;
+  }
+
+  // --scrub
+  const bool scrub = static_cast<bool>(options.get("scrub"));
+
+  if (scrub && volume->IsDatelDisc())
+  {
+    std::cerr << "Error: Scrubbing a Datel disc is not supported";
+    return 1;
+  }
+
+  if (scrub && format == DiscIO::BlobType::RVZ)
+  {
+    std::cerr << "Warning: Scrubbing an RVZ container does not offer significant space advantages. "
+                 "Continuing anyway."
+              << std::endl;
+  }
+
+  if (scrub && format == DiscIO::BlobType::PLAIN)
+  {
+    std::cerr << "Warning: Scrubbing does not save space when converting to ISO unless using "
+                 "external compression. Continuing anyway."
+              << std::endl;
+  }
+
+  if (!scrub && format == DiscIO::BlobType::GCZ &&
+      volume->GetVolumeType() == DiscIO::Platform::WiiDisc && !volume->IsDatelDisc())
+  {
+    std::cerr << "Warning: Converting Wii disc images to GCZ without scrubbing may not offer space "
+                 "advantages over ISO. Continuing anyway."
+              << std::endl;
+  }
+
+  if (volume->IsNKit())
+  {
+    std::cerr << "Warning: Converting an NKit file, output will still be NKit! Continuing anyway."
+              << std::endl;
+  }
+
+  // --block_size
+  std::optional<int> block_size_o;
+  if (options.is_set("block_size"))
+    block_size_o = static_cast<int>(options.get("block_size"));
+
+  if (format == DiscIO::BlobType::GCZ || format == DiscIO::BlobType::WIA ||
+      format == DiscIO::BlobType::RVZ)
+  {
+    if (!block_size_o.has_value())
+    {
+      std::cerr << "Error: Block size must be set for GCZ/RVZ/WIA" << std::endl;
+      return 1;
+    }
+
+    if (!DiscIO::IsDiscImageBlockSizeValid(block_size_o.value(), format))
+    {
+      std::cerr << "Error: Block size is not valid for this format" << std::endl;
+      return 1;
+    }
+
+    if (block_size_o.value() < DiscIO::PREFERRED_MIN_BLOCK_SIZE ||
+        block_size_o.value() > DiscIO::PREFERRED_MAX_BLOCK_SIZE)
+    {
+      std::cerr << "Warning: Block size is not ideal for performance. Continuing anyway."
+                << std::endl;
+    }
+
+    if (format == DiscIO::BlobType::GCZ &&
+        !DiscIO::IsGCZBlockSizeLegacyCompatible(block_size_o.value(), volume->GetSize()))
+    {
+      std::cerr << "Warning: For GCZs to be compatible with Dolphin < 5.0-11893, "
+                   "the file size must be an integer multiple of the block size "
+                   "and must not be an integer multiple of the block size multiplied by 32. "
+                   "Continuing anyway."
+                << std::endl;
+    }
+  }
+
+  // --compress, --compress_level
+  std::optional<DiscIO::WIARVZCompressionType> compression_o =
+      ParseCompressionTypeString(static_cast<const char*>(options.get("compression")));
+
+  std::optional<int> compression_level_o;
+  if (options.is_set("compression_level"))
+    compression_level_o = static_cast<int>(options.get("compression_level"));
+
+  if (format == DiscIO::BlobType::WIA || format == DiscIO::BlobType::RVZ)
+  {
+    if (!compression_o.has_value())
+    {
+      std::cerr << "Error: Compression format must be set for WIA or RVZ" << std::endl;
+      return 1;
+    }
+
+    if ((format == DiscIO::BlobType::WIA &&
+         compression_o.value() == DiscIO::WIARVZCompressionType::Zstd) ||
+        (format == DiscIO::BlobType::RVZ &&
+         compression_o.value() == DiscIO::WIARVZCompressionType::Purge))
+    {
+      std::cerr << "Error: Compression type is not supported for the container format" << std::endl;
+      return 1;
+    }
+
+    if (compression_o.value() == DiscIO::WIARVZCompressionType::None)
+    {
+      compression_level_o = 0;
+    }
+    else
+    {
+      if (!compression_level_o.has_value())
+      {
+        std::cerr << "Error: Compression level must be set when compression type is not 'none'"
+                  << std::endl;
+        return 1;
+      }
+
+      const std::pair<int, int> range = DiscIO::GetAllowedCompressionLevels(compression_o.value());
+      if (compression_level_o.value() < range.first || compression_level_o.value() > range.second)
+      {
+        std::cerr << "Error: Compression level not in acceptable range" << std::endl;
+        return 1;
+      }
+    }
+  }
+
+  // Open the blob reader
+  std::unique_ptr<DiscIO::BlobReader> blob_reader =
+      scrub ? DiscIO::ScrubbedBlob::Create(input_file_path) :
+              DiscIO::CreateBlobReader(input_file_path);
+  if (!blob_reader)
+  {
+    std::cerr << "Error: Unable to process disc image. If --scrub is enabled, try again without it."
+              << std::endl;
+    return 1;
+  }
+
+  // Perform the conversion
+  const auto NOOP_STATUS_CALLBACK = [](const std::string& text, float percent) { return true; };
+
+  bool success = false;
+
+  switch (format)
+  {
+  case DiscIO::BlobType::PLAIN:
+    success = DiscIO::ConvertToPlain(blob_reader.get(), input_file_path, output_file_path,
+                                     NOOP_STATUS_CALLBACK);
+    break;
+
+  case DiscIO::BlobType::GCZ:
+    success = DiscIO::ConvertToGCZ(blob_reader.get(), input_file_path, output_file_path,
+                                   volume->GetVolumeType() == DiscIO::Platform::WiiDisc ? 1 : 0,
+                                   block_size_o.value(), NOOP_STATUS_CALLBACK);
+    break;
+
+  case DiscIO::BlobType::WIA:
+  case DiscIO::BlobType::RVZ:
+    success = DiscIO::ConvertToWIAOrRVZ(blob_reader.get(), input_file_path, output_file_path,
+                                        format == DiscIO::BlobType::RVZ, compression_o.value(),
+                                        compression_level_o.value(), block_size_o.value(),
+                                        NOOP_STATUS_CALLBACK);
+    break;
+
+  default:
+    ASSERT(false);
+    break;
+  }
+
+  if (!success)
+  {
+    std::cerr << "Error: Conversion failed" << std::endl;
+    return 1;
+  }
+
+  return 0;
+}
+
+std::optional<DiscIO::WIARVZCompressionType>
+ConvertCommand::ParseCompressionTypeString(const std::string compression_str)
+{
+  if (compression_str == "none")
+    return DiscIO::WIARVZCompressionType::None;
+  else if (compression_str == "purge")
+    return DiscIO::WIARVZCompressionType::Purge;
+  else if (compression_str == "bzip2")
+    return DiscIO::WIARVZCompressionType::Bzip2;
+  else if (compression_str == "lzma")
+    return DiscIO::WIARVZCompressionType::LZMA;
+  else if (compression_str == "lzma2")
+    return DiscIO::WIARVZCompressionType::LZMA2;
+  else if (compression_str == "zstd")
+    return DiscIO::WIARVZCompressionType::Zstd;
+  else
+    return std::nullopt;
+}
+
+std::optional<DiscIO::BlobType> ConvertCommand::ParseFormatString(const std::string format_str)
+{
+  if (format_str == "iso")
+    return DiscIO::BlobType::PLAIN;
+  else if (format_str == "gcz")
+    return DiscIO::BlobType::GCZ;
+  else if (format_str == "wia")
+    return DiscIO::BlobType::WIA;
+  else if (format_str == "rvz")
+    return DiscIO::BlobType::RVZ;
+  else
+    return std::nullopt;
+}
+
+}  // namespace DolphinTool