Initial community commit

1 files changed, 92 insertions, 0 deletions

diff --git a/Src/external_dependencies/openmpt-trunk/soundlib/OggStream.h b/Src/external_dependencies/openmpt-trunk/soundlib/OggStream.h
new file mode 100644
index 00000000..a8165527
--- /dev/null
+++ b/Src/external_dependencies/openmpt-trunk/soundlib/OggStream.h
@@ -0,0 +1,92 @@
+/*
+ * OggStream.h
+ * -----------
+ * Purpose: Basic Ogg stream parsing functionality
+ * Notes  : (currently none)
+ * Authors: OpenMPT Devs
+ * The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
+ */
+
+
+#pragma once
+
+#include "openmpt/all/BuildSettings.hpp"
+
+#include "openmpt/base/Endian.hpp"
+#include "mpt/io/io.hpp"
+
+#include "../common/FileReaderFwd.h"
+
+
+OPENMPT_NAMESPACE_BEGIN
+
+
+namespace Ogg
+{
+
+struct PageHeader
+{
+	char     capture_pattern[4]; // "OggS"
+	uint8le  version;
+	uint8le  header_type;
+	uint64le granule_position;
+	uint32le bitstream_serial_number;
+	uint32le page_sequence_number;
+	uint32le CRC_checksum;
+	uint8le  page_segments;
+};
+
+MPT_BINARY_STRUCT(PageHeader, 27)
+
+
+struct PageInfo
+{
+	PageHeader header;
+	uint8 segment_table[255];
+	PageInfo()
+	{
+		MemsetZero(header);
+		MemsetZero(segment_table);
+	}
+	uint16 GetPagePhysicalSize() const;
+	uint16 GetPageHeaderSize() const;
+	uint16 GetPageDataSize() const;
+};
+
+
+// returns false on EOF
+bool AdvanceToPageMagic(FileReader &file);
+
+bool ReadPage(FileReader &file, PageInfo &pageInfo, std::vector<uint8> *pageData = nullptr);
+bool ReadPage(FileReader &file, PageInfo &pageInfo, std::vector<uint8> &pageData);
+bool ReadPage(FileReader &file);
+
+bool ReadPageAndSkipJunk(FileReader &file, PageInfo &pageInfo, std::vector<uint8> &pageData);
+
+
+bool UpdatePageCRC(PageInfo &pageInfo, const std::vector<uint8> &pageData);
+
+
+template <typename Tfile>
+bool WritePage(Tfile & f, const PageInfo &pageInfo, const std::vector<uint8> &pageData)
+{
+	if(!mpt::IO::Write(f, pageInfo.header))
+	{
+		return false;
+	}
+	if(!mpt::IO::WriteRaw(f, pageInfo.segment_table, pageInfo.header.page_segments))
+	{
+		return false;
+	}
+	if(!mpt::IO::WriteRaw(f, pageData.data(), pageData.size()))
+	{
+		return false;
+	}
+	return true;
+}
+
+
+} // namespace Ogg
+
+
+OPENMPT_NAMESPACE_END