Initial community commit

Src/nsmkv/Cluster.h

@@ -0,0 +1,106 @@
+#pragma once
+#include "mkv_reader.h"
+#include <bfc/platform/types.h>
+
+const uint32_t mkv_segment_cluster = 0xf43b675;
+const uint32_t mkv_cluster_timecode = 0x67;
+const uint32_t mkv_cluster_blockgroup = 0x20;
+const uint32_t mkv_cluster_simpleblock = 0x23;
+const uint32_t mkv_blockgroup_referenceblock = 0x7b;
+const uint32_t mkv_blockgroup_block = 0x21;
+const uint32_t mkv_blockgroup_blockduration = 0x1b;
+
+/* TODO: benski>
+need to think this whole thing through.
+Ideally, we would be able to enumerate through the clusters/blocks,
+but the output plugin might have a different audio buffer size
+than the size that the encoder assumed.
+so the first attempt is going to be random access
+and we'll see if there is a better way after implementation
+*/
+namespace nsmkv
+{
+
+	class BlockBinary
+	{
+	public:
+		BlockBinary()
+		{
+			data=0;
+			data_size=0;
+			track_number=0;
+			flags=0;
+			time_code=0;
+		}
+		~BlockBinary()
+		{
+			free(data);
+		}
+		uint64_t track_number;
+		int16_t time_code;
+		uint8_t flags;
+		size_t data_size;
+		void *data; // maybe optionally allow the user to pass in the buffer to reduce mallocs
+		
+		enum
+		{
+			LACE_MASK = 0x6,
+			XIPH_LACING= 0x2,
+			FIXED_LACING = 0x4,
+			EBML_LACING = 0x6,
+			NO_LACING = 0x0,			
+		};
+	};
+
+	class Block
+	{
+		public:
+			Block()
+#ifdef WA_VALIDATE
+				:
+				reference_block_found(false),
+				block_duration_found(false)
+#endif
+			{
+				reference_block=0;
+				block_duration=0;
+			}
+			BlockBinary binary;
+			uint64_t reference_block;
+			uint64_t block_duration;
+
+#ifdef WA_VALIDATE
+			bool reference_block_found;
+			bool block_duration_found;
+#endif
+	};
+
+	class Cluster
+	{
+	public:
+		Cluster()
+#ifdef WA_VALIDATE
+			:
+			time_code_found(false)
+#endif
+		{
+			time_code = 0;
+			position = 0;
+			previous_size = 0;
+		}
+		uint64_t time_code;
+		uint64_t position;
+		uint64_t previous_size;
+#ifdef WA_VALIDATE
+		bool time_code_found;
+#endif
+	};
+
+	class Clusters
+	{
+
+	};
+	uint64_t ReadCluster(MKVReader *reader, uint64_t size, nsmkv::Cluster &cluster);
+	uint64_t ReadBlockBinary(MKVReader *reader, uint64_t size, nsmkv::BlockBinary &binary, uint64_t *allowed_track_numbers, size_t num_allowed_track_numbers);
+	uint64_t ReadBlockGroup(MKVReader *reader, uint64_t size, nsmkv::Block &block, uint64_t *allowed_track_numbers, size_t num_allowed_track_numbers);
+}