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Code Issues Releases Wiki Activity

Fixed margin handling in cRingBufferLinear

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This commit is contained in:
Klaus Schmidinger 2003-02-15 13:21:50 +01:00
parent 63ad7f1c71
commit 05e2966b35
2 changed files with 11 additions and 5 deletions
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1
HISTORY
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@ -1961,3 +1961,4 @@ Video Disk Recorder Revision History
- Fixed high CPU load during replay (thanks Marcel Wiesweg for pointing out this - Fixed high CPU load during replay (thanks Marcel Wiesweg for pointing out this
one). one).
- Fixed margin handling in cRingBufferLinear.

15
ringbuffer.c
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@ -7,7 +7,7 @@
* Parts of this file were inspired by the 'ringbuffy.c' from the * Parts of this file were inspired by the 'ringbuffy.c' from the
* LinuxDVB driver (see linuxtv.org). * LinuxDVB driver (see linuxtv.org).
* *
* $Id: ringbuffer.c 1.13 2003/01/26 19:47:10 kls Exp $ * $Id: ringbuffer.c 1.14 2003/02/15 13:21:50 kls Exp $
*/ */
#include "ringbuffer.h" #include "ringbuffer.h"
@ -34,14 +34,14 @@ cRingBuffer::~cRingBuffer()
void cRingBuffer::WaitForPut(void) void cRingBuffer::WaitForPut(void)
{ {
putMutex.Lock(); putMutex.Lock();
readyForPut.Wait(putMutex); readyForPut.TimedWait(putMutex, 1000);
putMutex.Unlock(); putMutex.Unlock();
} }
void cRingBuffer::WaitForGet(void) void cRingBuffer::WaitForGet(void)
{ {
getMutex.Lock(); getMutex.Lock();
readyForGet.Wait(getMutex); readyForGet.TimedWait(getMutex, 10);
getMutex.Unlock(); getMutex.Unlock();
} }
@ -102,7 +102,7 @@ int cRingBufferLinear::Put(const uchar *Data, int Count)
Lock(); Lock();
int rest = Size() - head; int rest = Size() - head;
int diff = tail - head; int diff = tail - head;
int free = (diff > 0) ? diff - 1 : Size() + diff - (tail < margin ? -(margin - tail) : margin) - 1; int free = ((tail < margin) ? rest : (diff > 0) ? diff : Size() + diff - margin) - 1;
if (statistics) { if (statistics) {
int fill = Size() - free - 1 + Count; int fill = Size() - free - 1 + Count;
if (fill >= Size()) if (fill >= Size())
@ -136,6 +136,8 @@ int cRingBufferLinear::Put(const uchar *Data, int Count)
Count = 0; Count = 0;
Unlock(); Unlock();
EnableGet(); EnableGet();
if (Count == 0)
WaitForPut();
} }
return Count; return Count;
} }
@ -147,7 +149,7 @@ const uchar *cRingBufferLinear::Get(int &Count)
if (getThreadPid < 0) if (getThreadPid < 0)
getThreadPid = getpid(); getThreadPid = getpid();
int rest = Size() - tail; int rest = Size() - tail;
if (tail > Size() - margin && head < tail) { if (rest < margin && head < tail) {
int t = margin - rest; int t = margin - rest;
memcpy(buffer + t, buffer + tail, rest); memcpy(buffer + t, buffer + tail, rest);
tail = t; tail = t;
@ -169,10 +171,13 @@ const uchar *cRingBufferLinear::Get(int &Count)
void cRingBufferLinear::Del(int Count) void cRingBufferLinear::Del(int Count)
{ {
if (Count > 0 && Count <= lastGet) { if (Count > 0 && Count <= lastGet) {
Lock();
tail += Count; tail += Count;
lastGet -= Count; lastGet -= Count;
if (tail >= Size()) if (tail >= Size())
tail = margin; tail = margin;
Unlock();
EnablePut();
} }
else else
esyslog("ERROR: invalid Count in cRingBufferLinear::Del: %d", Count); esyslog("ERROR: invalid Count in cRingBufferLinear::Del: %d", Count);