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// LOG.C
// low overhead logging routines
// can be used in time-critical situations
// LogInit should be called once to create the memory mapped file
// use LOGVIEW.EXE to view the log.
#include "precomp.h"
#ifdef LOGGING
// storage in log.c
// Strings corresponding to LOGMSG_XXX
// Note: cant use %s in format string
char LogStringTable [][MAX_STRING_SIZE] = {// dont exceed the size of the string below!
// "123456789012345678901234567890123456789012345678901234567890123"
"Sent at %d\n", "NetRecv ts = %d, seq = %d at %d\n", "AP::Send (%d), %d bytes, ts =%d\n", "AP::Silent (%d) %d\n", "AP::Record (%d)\n", "AP::Recv (%d) seq = %d len=%d\n", "Rx::Reset1 MaxT=%d PlayT=%d PlayPos=%d\n", "Rx::Reset2 MaxT=%d PlayT=%d PlayPos=%d\n", "AP::Encoded(%d)\n", "AP::Decoded(%d)\n", "AP::Playing(%d) at %d\n", "AP::PlaySil(%d)\n", "RcrdTh:: try to open audio dev\n", "PlayTh: too many missings and Yield\n", "RcrdTh:: too many silence and Yield\n", "AP::Recycle(%d)\n", "AutoSilence: strength=%d,threshold=%d,avgSilence=%d\n", "Tx -Presend(%d)\n", "Rx-Skipping(%d)\n", "Tx::Reset FreePos=%d SendPos=%d\n", "Rx::VarDelay=%d samples, avgVarDelay=%d, delayPos=%d\n", "AP::PlayInterpolated(%d)\n", "AP::Interpolated (%d) %d\n", "VP::Send (%d), %d bytes, ts =%d\n", "VP::Recv (%d) seq = %d len=%d\n", "VP::Recycle(%d)\n", "VP::Record (%d)\n", "VP::Playing(%d) at %d\n", "VP::PlaySil(%d)\n", "VP::PlayInterpolated(%d)\n", "VP::Interpolated (%d) %d\n", "VP::Encoded(%d)\n", "VP::Decoded(%d)\n", "Vid::Trying to open Capture\n", "Vid:GetSendFrame (%d)\n", "Vid:GetRecvFrame (%d)\n", "Vid:ReleaseSendFrame(%d)\n", "Vid:ReleaseRecvFrame(%d)\n", "Vid:Playing back TS %d aud sync %d\n", "DGSOCK:->OnRead (%d)\n", "DGSOCK:<-OnRead (%d)\n", "DGSOCK:->OnReadDone (%d)\n", "DGSOCK:<-OnReadDone (%d)\n", "DGSOCK:->RecvFrom (%d)\n", "DGSOCK:<-RecvFrom (%d)\n", "DGSOCK:ReadWouldBlock (%d)\n", "VidSend: VP::Queue %d bytes, ts =%d at %d\n", "VidSend: AP::Queue %d bytes, ts =%d at %d\n", "VidSend: VP::Send %d bytes, ts =%d at %d\n", "VidSend: AP::Send %d bytes, ts =%d at %d\n", "VidSend: VP::!Send %d bytes, ts =%d\n", "VidSend: AP::!Send %d bytes, ts =%d\n", "VidSend: IO Pending\n", "VidSend: Audio queue is empty\n", "VidSend: Video queue is empty\n", "AudSend: VP::Queue %d bytes, ts =%d\n", "AudSend: AP::Queue %d bytes, ts =%d at %d\n", "AudSend: VP::Send %d bytes, ts =%d\n", "AudSend: AP::Send %d bytes, ts =%d at %d\n", "AudSend: VP::!Send %d bytes, ts =%d\n", "AudSend: AP::!Send %d bytes, ts =%d\n", "AudSend: IO Pending\n", "AudSend: Audio queue is empty\n", "AudSend: Video queue is empty\n", "Send blocked for %d ms\n",
"DS PlayBuf: Play=%d, Write=%d, len=%d\n", "DS Empty : Play=%d, lastPlay=%d, nextWrite=%d\n", "DS Timeout: Play=%d, nextWrite=%d at %d\n", "DS PlayBuf Overflow! SetPlayPosition to %d (hr=%d)\n", "DS Create: (hr = %d)\n", "DS Release: (uref = %d)\n", "DS PlayBuf: Dropped out of sequence packet\n", "DS PlayBuf: timestamp=%d, seq=%d, fMark=%d\n", "DS PlayBuf: GetTickCount=%d\n", "DS PlayBuf: PlayPos=%d, WritePos=%d\n", "DS PlayBuf: Dropping packet due to overflow\n", "m_Next=%d, curDelay=%d, bufSize=%d\n",
"Send Audio Config took %ld ms\r\n", "Send Audio UnConfig took %ld ms\r\n", "Send Video Config took %ld ms\r\n", "Send Video UnConfig took %ld ms\r\n", "Recv Audio Config took %ld ms\r\n", "Recv Audio UnConfig took %ld ms\r\n", "Recv Video Config took %ld ms\r\n", "Recv Video UnConfig took %ld ms\r\n",
"DSC Timestamp: %d\r\n", "DSC GetCurrentPos: capPos=%d ReadPos=%d\r\n", "DSC Timeout: A timeout has occured\r\n", "DSC Lagging condition: Lag=%d NextExpect=%d\r\n", "DSC Sending: Num=%d, dwFirstPos=%d, dwLastPos=%d\r\n", "DSC Stats: BufferSize=%d, FrameSize=%d\r\n", "DSC Early condition detected\r\n"};
#define MAX_LOG_ENTRIES 2048
// IMPORTANT: should be identical to definition in viewer app.
typedef struct { int locked; // set to TRUE while viewer is accessing log
int cdwEntrySize; int cMaxEntries; int cbOffsetBase; // from start of this struct
int cbOffsetStringTable; // from start of this struct
int cStrings; // number of strings
int cCurrent; // index of current log position
} LOG_HEADER;
struct LogEntry { DWORD dw[4];} *pLogBase;
#define MAX_LOG_SIZE (sizeof(LOG_HEADER)+sizeof(struct LogEntry)*MAX_LOG_ENTRIES + sizeof(LogStringTable))
HANDLE hMapFile = NULL;char szLogViewMap[] = "LogViewMap";LOG_HEADER *pLog=NULL;CRITICAL_SECTION logCritSect; // not used
void Log (UINT n, UINT arg1, UINT arg2, UINT arg3){ struct LogEntry *pCurEntry; if (pLog == NULL || pLog->locked) return;
//EnterCriticalSection(&logCritSect);
// sideeffect of multiple access are not serious so
// dont bother with synchronization.
pLog->cCurrent++; if (pLog->cCurrent >= pLog->cMaxEntries) { pLog->cCurrent = 0; //wraparound
} pCurEntry = pLogBase + pLog->cCurrent; pCurEntry->dw[0] = n; pCurEntry->dw[1] = arg1; pCurEntry->dw[2] = arg2; pCurEntry->dw[3] = arg3; //LeaveCriticalSection(&logCritSect);
}
int LogInit(){ int fSuccess; hMapFile = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, MAX_LOG_SIZE, szLogViewMap); if (hMapFile == NULL) { //printf("Couldnt open Map: %s\n",szLogViewMap);
fSuccess = FALSE; goto Exit; } pLog = (LOG_HEADER *)MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, 0); // entire file starting from offset 0
if (pLog == NULL) { //printf("Couldnt map view %s\n",szLogViewMap);
fSuccess = FALSE; goto Exit; } InitializeCriticalSection(&logCritSect); // initialize log
pLog->locked = 0; pLog->cdwEntrySize = sizeof(struct LogEntry)/sizeof(DWORD); // size in dwords
pLog->cMaxEntries = MAX_LOG_ENTRIES; pLog->cbOffsetBase = sizeof(LOG_HEADER)+sizeof(LogStringTable); pLog->cbOffsetStringTable = sizeof(LOG_HEADER); pLog->cStrings = sizeof(LogStringTable)/MAX_STRING_SIZE; pLog->cCurrent = 0; // current position
pLogBase = (struct LogEntry *)((PBYTE)pLog + pLog->cbOffsetBase);
memcpy((PBYTE)pLog + pLog->cbOffsetStringTable, LogStringTable, sizeof(LogStringTable)); memset((PBYTE)pLogBase,0,MAX_LOG_ENTRIES*pLog->cdwEntrySize*4); fSuccess = TRUE;Exit: return fSuccess;}
LogClose(){ if (pLog) { DeleteCriticalSection(&logCritSect); UnmapViewOfFile(pLog); pLog = NULL; CloseHandle(hMapFile); hMapFile = NULL; } return TRUE;}#endif // LOGGING enabled
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