109 lines
2.8 KiB
C++
109 lines
2.8 KiB
C++
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#include "idemowriter.h"
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#include "demofile/demotypes.h"
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#include "demofile/demofile.h"
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#include "netmessages/nethandlers.h"
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#include "netmessages/netcontants.h"
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#include "demmessages/demhandlers.h"
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#include "sourcesdk/bitbuf.h"
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#include <cstdio>
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#include <memory>
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#ifdef _WIN32
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#include <io.h>
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#else
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#include <unistd.h>
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#endif
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#include <sys/stat.h>
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int truncate(FILE* fp, int relative_offset)
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{
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fflush(fp);
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#ifdef _WIN32
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const int fd = _fileno(fp);
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#else
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const int fd = fileno(fp);
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#endif
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struct stat statbuf;
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fstat(fd, &statbuf);
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#ifdef _WIN32
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return _chsize_s(fd, statbuf.st_size + relative_offset);
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#else
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return ftruncate(fd, statbuf.st_size + relative_offset);
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#endif
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}
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class DemoWriter: public IDemoWriter
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{
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public:
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DemoWriter(FILE* outputFp);
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virtual void StartWriting(demoheader_t& header) override final;
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virtual void EndWriting() override final;
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virtual void StartCommandPacket(const CommandPacket& packet) override final;
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virtual void EndCommandPacket(const PacketTrailingBits& trailingBits) override final;
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virtual void WriteNetPacket(NetPacket& packet, SourceGameContext& context) override final;
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private:
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DemoFileWriter m_writer;
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bf_write m_cmdPacketBuf;
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std::unique_ptr<uint8_t[]> m_packetBuffer;
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};
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IDemoWriter* IDemoWriter::CreateDemoWriter(void* outputFp)
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{
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return new DemoWriter(reinterpret_cast<FILE*>(outputFp));
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}
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DemoWriter::DemoWriter(FILE* outputFp):
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m_writer(outputFp),
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m_cmdPacketBuf(),
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m_packetBuffer(new uint8_t[NET_MAX_PAYLOAD])
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{
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m_cmdPacketBuf.StartWriting(m_packetBuffer.get(), NET_MAX_PAYLOAD);
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}
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void DemoWriter::StartWriting(demoheader_t& header)
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{
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m_writer.WriteDemoHeader(header);
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}
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void DemoWriter::EndWriting()
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{
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// stv demos have a byte chopped off of the end
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// i dunno why, just doit
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truncate(m_writer.GetFp(), -1);
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}
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void DemoWriter::StartCommandPacket(const CommandPacket& packet)
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{
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m_writer.WriteCmdHeader(packet.cmd, packet.tick);
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DemHandlers::DemMsg_FileWrite(packet.cmd, m_writer, packet.data);
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m_cmdPacketBuf.Reset();
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}
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void DemoWriter::EndCommandPacket(const PacketTrailingBits& trailingBits)
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{
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if (trailingBits.numTrailingBits > 0)
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{
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m_cmdPacketBuf.WriteUBitLong(trailingBits.value, trailingBits.numTrailingBits);
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}
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const int numBitsToWrite = m_cmdPacketBuf.GetNumBitsWritten() % 8;
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if (numBitsToWrite != 0)
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{
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assert(false);
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}
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if (m_cmdPacketBuf.GetNumBytesWritten() > 0)
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{
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m_writer.WriteRawData(m_cmdPacketBuf.GetBasePointer(), m_cmdPacketBuf.GetNumBytesWritten());
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}
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}
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void DemoWriter::WriteNetPacket(NetPacket& packet, SourceGameContext& context)
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{
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m_cmdPacketBuf.WriteUBitLong(packet.type, NETMSG_TYPE_BITS);
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NetHandlers::NetMsg_BitWrite(packet.type, m_cmdPacketBuf, context, packet.data);
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}
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