607 lines
18 KiB
C
607 lines
18 KiB
C
#define NETWORKINTID_INVALID -1
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#define DEFAULT_STREAMING_ACN_PORT 5568
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#define IP_ADDRESS_BYTES 16
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#define STARTCODE_DMX 0
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/*
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* a description of the address space being used
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*/
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#define PREAMBLE_SIZE_ADDR 0
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#define POSTAMBLE_SIZE_ADDR 2
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#define ACN_IDENTIFIER_ADDR 4
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#define ROOT_FLAGS_AND_LENGTH_ADDR 16
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#define ROOT_VECTOR_ADDR 18
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#define CID_ADDR 22
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#define FRAMING_FLAGS_AND_LENGTH_ADDR 38
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#define FRAMING_VECTOR_ADDR 40
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#define SOURCE_NAME_ADDR 44
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#define PRIORITY_ADDR 108
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#define RESERVED_ADDR 109
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#define SEQ_NUM_ADDR 111
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#define OPTIONS_ADDR 112
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#define UNIVERSE_ADDR 113
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#define DMP_FLAGS_AND_LENGTH_ADDR 115
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#define DMP_VECTOR_ADDR 117
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#define DMP_ADDRESS_AND_DATA_ADDR 118
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#define FIRST_PROPERTY_ADDRESS_ADDR 119
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#define ADDRESS_INC_ADDR 121
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#define PROP_COUNT_ADDR 123
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#define START_CODE_ADDR 125
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#define PROP_VALUES_ADDR (START_CODE_ADDR + 1)
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/*
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* common sizes
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*/
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#define STREAM_HEADER_SIZE 126
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#define STREAM_BODY_SIZE 512
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#define SOURCE_NAME_SIZE 64
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#define RLP_PREAMBLE_SIZE 16
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#define RLP_POSTAMBLE_SIZE 0
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#define ACN_IDENTIFIER_SIZE 12
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/*
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* data definitions
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*/
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#define ACN_IDENTIFIER "ASC-E1.17\0\0\0"
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#define ROOT_VECTOR 4
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#define FRAMING_VECTOR 2
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#define DMP_VECTOR 2
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#define ADDRESS_AND_DATA_FORMAT 0xa1
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#define ADDRESS_INC 1
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#define DMP_FIRST_PROPERTY_ADDRESS_FORCE 0
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#define RESERVED_VALUE 0
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//for support of the early draft
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#define DRAFT_STREAM_HEADER_SIZE 90
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#define DRAFT_SOURCE_NAME_SIZE 32
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//for support of the early draft
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#define DRAFT_ROOT_VECTOR 3
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const u32 VHD_MAXFLAGBYTES = 7; //The maximum amount of bytes used to pack the flags, len, and vector
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const u32 VHD_MAXLEN = 0x0fffff; //The maximum packet length is 20 bytes long
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const u32 VHD_MAXMINLENGTH = 4095; //The highest length that will fit in the "smallest" length pack
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//Defines for the VHD flags
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const u8 VHD_L_FLAG = 0x80;
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const u8 VHD_V_FLAG = 0x40;
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const u8 VHD_H_FLAG = 0x20;
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const u8 VHD_D_FLAG = 0x10;
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#define CID_Bytes 16
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struct cid
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{
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u8 Bytes[CID_Bytes];
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};
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struct sacn_universe
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{
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s16 Universe;
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u8* StartPositionInSendBuffer;
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s32 SizeInSendBuffer;
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s32 OffsetInSendBuffer;
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s32 BeginPixelCopyFromOffset;
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platform_network_address_handle SendAddress;
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};
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struct sacn_send_buffer
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{
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u8* Memory;
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s32 Size;
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sacn_send_buffer* Next;
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};
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struct sacn_universe_buffer
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{
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sacn_universe* Universes;
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s32 Used;
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s32 Max;
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sacn_universe_buffer* Next;
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};
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struct streaming_acn
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{
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memory_arena Memory;
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// These get created and freed together
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sacn_universe_buffer* UniverseBuffer;
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sacn_send_buffer* SendBuffer;
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platform_socket_handle SendSocket;
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cid CID;
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s32 SequenceIterator;
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};
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// SACN Data Header Functions
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internal void InitStreamHeader (u8* Buffer, s32 BufferSize, u16 SlotCount, u8 StartCode, u16 Universe, u8 Priority, u16 Reserved, u8 Options, const char* SourceName, cid CID);
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internal void SetStreamHeaderSequence_ (u8* Buffer, u8 Sequence, b32 Draft);
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internal void VHD_PackFlags_(u8* Buffer, b32 InheritVec, b32 InheritHead, b32 InheritData);
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internal u8* VHD_PackLength_(u8* Buffer, u32 Length, b32 IncludeLength);
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internal cid StringToCID_ (const char* String);
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#define CalculateSendBufferSize(UniverseCount) ((UniverseCount * (STREAM_HEADER_SIZE + STREAM_BODY_SIZE)) + sizeof(sacn_send_buffer))
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#define CalculateUniverseBufferSize(UniverseCount) ((UniverseCount * sizeof(sacn_universe)) + sizeof(sacn_universe_buffer))
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// Utility
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struct sacn_pixel
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{
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u8 R;
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u8 G;
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u8 B;
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};
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//
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internal sacn_universe*
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SACNGetUniverse (s32 UniverseNumber, streaming_acn* SACN)
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{
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sacn_universe* Result = 0;
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sacn_universe_buffer* Header = SACN->UniverseBuffer;
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while (Header)
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{
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sacn_universe* Cursor = Header->Universes;
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for (s32 i = 0; i < Header->Used; i++)
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{
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if (Cursor->Universe == UniverseNumber)
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{
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Result = Cursor;
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break;
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}
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Cursor++;
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}
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Header = Header->Next;
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}
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return Result;
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}
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internal void
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SACNPushSendBufferOnList (sacn_send_buffer* ListHead, sacn_send_buffer* NewBuffer)
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{
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if (ListHead->Next)
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{
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SACNPushSendBufferOnList(ListHead->Next, NewBuffer);
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}
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else
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{
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ListHead->Next = NewBuffer;
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}
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}
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internal sacn_send_buffer*
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SACNRemoveSendBufferFromList (sacn_send_buffer* List, sacn_send_buffer* Entry)
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{
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sacn_send_buffer* ListHead = 0;
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if (List != Entry && List->Next)
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{
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ListHead = SACNRemoveSendBufferFromList(List->Next, Entry);
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}
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else if (List == Entry)
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{
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ListHead = Entry->Next;
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}
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else
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{
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// NOTE(Peter): Trying to remove an entry from a list that doesn't contain it
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InvalidCodePath;
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}
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return ListHead;
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}
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internal void
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SACNPushUniverseBufferOnList (sacn_universe_buffer* ListHead, sacn_universe_buffer* NewBuffer)
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{
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if (ListHead->Next)
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{
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SACNPushUniverseBufferOnList(ListHead->Next, NewBuffer);
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}
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else
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{
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ListHead->Next = NewBuffer;
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}
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}
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internal sacn_universe_buffer*
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SACNRemoveUniverseBufferFromList (sacn_universe_buffer* List, sacn_universe_buffer* Entry)
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{
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sacn_universe_buffer* ListHead = 0;
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if (List != Entry && List->Next)
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{
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ListHead = SACNRemoveUniverseBufferFromList(List->Next, Entry);
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}
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else if (List == Entry)
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{
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ListHead = Entry->Next;
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}
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else
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{
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// NOTE(Peter): Trying to remove an entry from a list that doesn't contain it
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InvalidCodePath;
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}
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return ListHead;
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}
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struct sacn_add_universes_result
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{
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sacn_send_buffer* NewSendBuffer;
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sacn_universe_buffer* NewUniverseBuffer;
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};
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internal sacn_add_universes_result
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SACNAddUniverses(s32* Universes, s32 UniversesLength, streaming_acn* SACN, context Context)
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{
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sacn_add_universes_result Result = {};
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// Determine which universes are already registered and not to be readded.
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// NOTE(Peter): This might create funky behaviour if two sculptures start sending data to the same universe
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// but I'm not sure its incorrect behavior. I think, eventually, we will want to spit out a report from
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// this function that says what universes were duplicated. We might want to display this information to the user
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// in a way that they don't have to exit out of every single time they load the software. Not sure
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s32 UniversesToAdd = 0;
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for (s32 i = 0; i < UniversesLength; i++)
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{
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sacn_universe* UniverseExists = SACNGetUniverse(Universes[i], SACN);
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if (UniverseExists)
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{
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Universes[i] = -1;
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}
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else
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{
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UniversesToAdd++;
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}
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}
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// Push On New Send and Universe Buffers
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s32 SendBufferSize = CalculateSendBufferSize(UniversesToAdd);
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u8* SendBufferMemory = PushArray(&SACN->Memory, u8, SendBufferSize);
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sacn_send_buffer* SendBufferHeader = (sacn_send_buffer*)SendBufferMemory;
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SendBufferHeader->Memory = (u8*)(SendBufferHeader + 1);
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SendBufferHeader->Size = SendBufferSize - sizeof(sacn_send_buffer);
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SendBufferHeader->Next = 0;
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if (SACN->SendBuffer)
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{
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SACNPushSendBufferOnList(SACN->SendBuffer, SendBufferHeader);
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}
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else
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{
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SACN->SendBuffer = SendBufferHeader;
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}
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s32 UniverseBufferSize = CalculateUniverseBufferSize(UniversesToAdd);
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u8* UniverseBufferMemory = PushArray(&SACN->Memory, u8, UniverseBufferSize);
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sacn_universe_buffer* UniverseBufferHeader = (sacn_universe_buffer*)UniverseBufferMemory;
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UniverseBufferHeader->Universes = (sacn_universe*)(UniverseBufferHeader + 1);
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UniverseBufferHeader->Used = 0;
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UniverseBufferHeader->Max = UniversesToAdd;
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if (SACN->UniverseBuffer)
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{
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SACNPushUniverseBufferOnList(SACN->UniverseBuffer, UniverseBufferHeader);
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}
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else
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{
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SACN->UniverseBuffer = UniverseBufferHeader;
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}
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// Add each of the valid universes
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for (s32 j = 0; j < UniversesLength; j++)
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{
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if (Universes[j] >= 0)
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{
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Assert(UniverseBufferHeader->Used < UniverseBufferHeader->Max);
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s32 Index = UniverseBufferHeader->Used++;
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s32 UniverseID = Universes[j];
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UniverseBufferHeader->Universes[Index].Universe = UniverseID;
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UniverseBufferHeader->Universes[Index].SizeInSendBuffer = STREAM_HEADER_SIZE + STREAM_BODY_SIZE;
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UniverseBufferHeader->Universes[Index].BeginPixelCopyFromOffset = -1;
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// Configure how the universe looks into the pixel color buffer
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s32 SendBufferOffset = (Index * (STREAM_HEADER_SIZE + STREAM_BODY_SIZE));
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u8* SendBufferStartPosition = SendBufferHeader->Memory + SendBufferOffset;
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UniverseBufferHeader->Universes[Index].OffsetInSendBuffer = SendBufferOffset;
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UniverseBufferHeader->Universes[Index].StartPositionInSendBuffer = SendBufferStartPosition;
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// Set up the Send Address
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u8 MulticastAddressBuffer[IP_ADDRESS_BYTES];
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GSMemSet(MulticastAddressBuffer, 0, IP_ADDRESS_BYTES);
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MulticastAddressBuffer[12] = 239;
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MulticastAddressBuffer[13] = 255;
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PackB2(MulticastAddressBuffer + 14, UniverseID);
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u_long V4Address = (u_long)UpackB4(MulticastAddressBuffer + IP_ADDRESS_BYTES - sizeof(u32));
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GSMemSet(&UniverseBufferHeader->Universes[Index].SendAddress, 0, sizeof(sockaddr_in));
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UniverseBufferHeader->Universes[Index].SendAddress = Context.PlatformGetSendAddress(
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AF_INET,
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HostToNetU16(DEFAULT_STREAMING_ACN_PORT),
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HostToNetU32(V4Address));
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#if 0 // Old Net Code
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UniverseBufferHeader->Universes[Index].SendAddress.sin_family = AF_INET;
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UniverseBufferHeader->Universes[Index].SendAddress.sin_port = HostToNetU16(DEFAULT_STREAMING_ACN_PORT);
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UniverseBufferHeader->Universes[Index].SendAddress.sin_addr.s_addr = HostToNetU32(V4Address);
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#endif
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s32 SlotCount = 512;
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InitStreamHeader(UniverseBufferHeader->Universes[Index].StartPositionInSendBuffer,
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UniverseBufferHeader->Universes[Index].SizeInSendBuffer,
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SlotCount,
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STARTCODE_DMX,
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UniverseID,
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0,
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0, // Reserved
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0, // Options
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"Source 1",
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SACN->CID
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);
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}
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}
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Result.NewUniverseBuffer = UniverseBufferHeader;
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Result.NewSendBuffer= SendBufferHeader;
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return Result;
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}
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internal void
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SACNRemoveUniverseAndSendBuffer(streaming_acn* SACN, sacn_universe_buffer* Universes, sacn_send_buffer* SendBuffer)
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{
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SACN->UniverseBuffer = SACNRemoveUniverseBufferFromList(SACN->UniverseBuffer, Universes);
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SACN->SendBuffer = SACNRemoveSendBufferFromList(SACN->SendBuffer, SendBuffer);
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}
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internal streaming_acn
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InitializeSACN (platform_alloc* PlatformAlloc, context Context)
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{
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streaming_acn SACN = {};
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InitMemoryArena(&SACN.Memory, 0, 0, PlatformAlloc);
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SACN.SendSocket = Context.PlatformGetSocketHandle(AF_INET, SOCK_DGRAM, 0);
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int Multicast_TimeToLive = 20;
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int Error = Context.PlatformSetSocketOption(SACN.SendSocket, IPPROTO_IP, IP_MULTICAST_TTL,
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(const char*)(&Multicast_TimeToLive), sizeof(Multicast_TimeToLive));
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SACN.CID = StringToCID_ ("{67F9D986-544E-4abb-8986-D5F79382586C}");
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SACN.UniverseBuffer = 0;
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SACN.SendBuffer = 0;
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return SACN;
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}
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internal void
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SACNSendDataToUniverse (streaming_acn* SACN, sacn_universe* Universe, platform_send_to* PlatformSendTo)
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{
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//DEBUG_TRACK_FUNCTION;
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u8* StartPositionInSendBuffer = (u8*)Universe->StartPositionInSendBuffer;
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SetStreamHeaderSequence_(StartPositionInSendBuffer, SACN->SequenceIterator, false);
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PlatformSendTo(SACN->SendSocket, Universe->SendAddress, (const char*)StartPositionInSendBuffer, Universe->SizeInSendBuffer, 0);
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#if 0 // Old Network Code
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// TODO(Peter): HUGE NOTE!!!!!!!!
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// This needs to be put on a separate thread. The sendto call is really slowing us down.
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s32 LengthSent = sendto(SACN->SendSocket, (const char*)StartPositionInSendBuffer, Universe->SizeInSendBuffer,
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0, (sockaddr*)(&Universe->SendAddress), sizeof(sockaddr_in));
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if (LengthSent == SOCKET_ERROR)
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{
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s32 LastSocketError = WSAGetLastError();
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InvalidCodePath;
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}
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#endif
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}
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internal void
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SACNCleanup(streaming_acn* SACN, context Context)
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{
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Context.PlatformCloseSocket(SACN->SendSocket);
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}
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///////////////////////////////////////////////
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//
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// SACN Data Header Functions
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//
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///////////////////////////////////////////////
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internal void
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InitStreamHeader (u8* Buffer, s32 BufferSize,
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u16 SlotCount,
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u8 StartCode,
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u16 Universe,
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u8 Priority,
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u16 Reserved,
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u8 Options,
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const char* SourceName,
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cid CID
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)
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{
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u8* Cursor = Buffer;
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// Preamble Size
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Cursor = PackB2(Cursor, RLP_PREAMBLE_SIZE);
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Cursor = PackB2(Cursor, RLP_POSTAMBLE_SIZE);
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memcpy(Cursor, ACN_IDENTIFIER, ACN_IDENTIFIER_SIZE);
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Cursor += ACN_IDENTIFIER_SIZE;
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// TODO(Peter): If you never use this anywhere else, go back and remove the parameters
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VHD_PackFlags_(Cursor, false, false, false);
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Cursor = VHD_PackLength_(Cursor,
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STREAM_HEADER_SIZE - RLP_PREAMBLE_SIZE + SlotCount,
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false);
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// root vector
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Cursor = PackB4(Cursor, ROOT_VECTOR);
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// CID Pack
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for (s32 i = 0; i < CID_Bytes; i++)
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{
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*Cursor++ = CID.Bytes[i];
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}
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VHD_PackFlags_(Cursor, false, false, false);
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Cursor = VHD_PackLength_(Cursor,
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STREAM_HEADER_SIZE - FRAMING_FLAGS_AND_LENGTH_ADDR + SlotCount,
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false);
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// framing vector
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Cursor = PackB4(Cursor, FRAMING_VECTOR);
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// framing source name
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strncpy((char*)Cursor, SourceName, SOURCE_NAME_SIZE);
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Cursor[SOURCE_NAME_SIZE - 1] = '\0';
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Cursor += SOURCE_NAME_SIZE;
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// priority
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Cursor = PackB1(Cursor, Priority);
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// reserved
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Cursor = PackB2(Cursor, Reserved);
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// Sequence # is always set to 0/NONE at the beginning, but it is incremented when sending data
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Cursor = PackB1(Cursor, 0);
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// Options
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Cursor = PackB1(Cursor, Options);
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// Universe
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Cursor = PackB2(Cursor, Universe);
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VHD_PackFlags_(Cursor, false, false, false);
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Cursor = VHD_PackLength_(Cursor,
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STREAM_HEADER_SIZE - DMP_FLAGS_AND_LENGTH_ADDR + SlotCount,
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false);
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// DMP Vector
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Cursor = PackB1(Cursor, DMP_VECTOR);
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// DMP Address and data type
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Cursor = PackB1(Cursor, ADDRESS_AND_DATA_FORMAT);
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// DMP first property address
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Cursor = PackB2(Cursor, 0);
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// DMP Address Increment
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Cursor = PackB2(Cursor, ADDRESS_INC);
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// Property Value Count -- Includes one byte for start code
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Cursor = PackB2(Cursor, SlotCount + 1);
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Cursor = PackB1(Cursor, StartCode);
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s32 DiffSize = Cursor - Buffer;
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if (Cursor - Buffer != STREAM_HEADER_SIZE)
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{
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InvalidCodePath;
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}
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}
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internal void
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SetStreamHeaderSequence_ (u8* Buffer, u8 Sequence, b32 Draft)
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{
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DEBUG_TRACK_FUNCTION;
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PackB1(Buffer + SEQ_NUM_ADDR, Sequence);
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}
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internal void
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VHD_PackFlags_(u8* Buffer, b32 InheritVec, b32 InheritHead, b32 InheritData)
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{
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u8* Cursor = Buffer;
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u8 NewByte = UpackB1(Cursor) & 0x8f;
|
|
|
|
if (!InheritVec) { NewByte |= VHD_V_FLAG; }
|
|
if (!InheritHead) { NewByte |= VHD_H_FLAG; }
|
|
if (!InheritData) { NewByte |= VHD_D_FLAG; }
|
|
|
|
PackB1(Cursor, NewByte);
|
|
}
|
|
|
|
internal u8*
|
|
VHD_PackLength_(u8* Buffer, u32 Length, b32 IncludeLength)
|
|
{
|
|
u8* Cursor = Buffer;
|
|
u32 AdjustedLength = Length;
|
|
if (IncludeLength)
|
|
{
|
|
if (Length + 1 > VHD_MAXMINLENGTH)
|
|
{
|
|
AdjustedLength += 2;
|
|
}
|
|
else
|
|
{
|
|
AdjustedLength += 1;
|
|
}
|
|
}
|
|
|
|
// Mask out the length bits to keep flags intact
|
|
u8 NewByte = UpackB1(Cursor) & 0x70;
|
|
if (AdjustedLength > VHD_MAXMINLENGTH)
|
|
{
|
|
NewByte |= VHD_L_FLAG;
|
|
}
|
|
|
|
u8 PackBuffer[4];
|
|
PackB4(PackBuffer, AdjustedLength);
|
|
if (AdjustedLength <= VHD_MAXMINLENGTH)
|
|
{
|
|
NewByte |= (PackBuffer[2] & 0x0f);
|
|
Cursor = PackB1(Cursor, NewByte);
|
|
Cursor = PackB1(Cursor, PackBuffer[3]);
|
|
}
|
|
else
|
|
{
|
|
NewByte |= (PackBuffer[1] & 0x0f);
|
|
Cursor = PackB1(Cursor, PackBuffer[2]);
|
|
Cursor = PackB1(Cursor, PackBuffer[3]);
|
|
}
|
|
|
|
return Cursor;
|
|
}
|
|
|
|
internal cid
|
|
StringToCID_ (const char* String)
|
|
{
|
|
cid Result = {};
|
|
|
|
const char* Src = String;
|
|
u8* Dest = &Result.Bytes[0];
|
|
b32 FirstNibble = true;
|
|
|
|
while(*Src && (Dest - &Result.Bytes[0] < CID_Bytes))
|
|
{
|
|
u8 Offset = 0;
|
|
if ((*Src >= 0x30) && (*Src <= 0x39)){ Offset = 0x30; }
|
|
else if ((*Src >= 0x41) && (*Src <= 0x46)) { Offset = 0x37; }
|
|
else if ((*Src >= 0x61) && (*Src <= 0x66)) { Offset = 0x66; }
|
|
|
|
if (Offset != 0)
|
|
{
|
|
if (FirstNibble)
|
|
{
|
|
*Dest = (u8)(*Src - Offset);
|
|
*Dest <<= 4;
|
|
FirstNibble = false;
|
|
}
|
|
else
|
|
{
|
|
*Dest |= (*Src - Offset);
|
|
Dest++;
|
|
FirstNibble = true;
|
|
}
|
|
}
|
|
Src++;
|
|
}
|
|
|
|
return Result;
|
|
}
|