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Fix buffer queue when filled in one shot.

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It would mod by the size and think it was empty, even though it had plenty
of data.  This could happen if a game creates a ringbuffer with 512
packets and then does a single put operation with 512 packets.

Such behavior is rare though, since it will cause lag in starting the
video.
This commit is contained in:
Unknown W. Brackets 2014-01-10 15:04:20 -08:00
parent 628426bbd4
commit 7287da38cb
1 changed files with 13 additions and 8 deletions
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21
Core/HW/BufferQueue.h
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@ -49,7 +49,11 @@ struct BufferQueue {
}
inline int getQueueSize() {
return (end + bufQueueSize - start) % bufQueueSize;
if (end >= start) {
return end - start;
} else {
return bufQueueSize + end - start;
}
}
inline int getRemainSize() {
@ -63,12 +67,13 @@ struct BufferQueue {
return false;
if (end + addsize <= bufQueueSize) {
memcpy(bufQueue + end, buf, addsize);
end += addsize;
} else {
int size = bufQueueSize - end;
memcpy(bufQueue + end, buf, size);
memcpy(bufQueue, buf + size, addsize - size);
int firstSize = bufQueueSize - end;
memcpy(bufQueue + end, buf, firstSize);
memcpy(bufQueue, buf + firstSize, addsize - firstSize);
end = addsize - firstSize;
}
end = (end + addsize) % bufQueueSize;
return true;
}
@ -82,9 +87,9 @@ struct BufferQueue {
if (start + bytesgot <= bufQueueSize) {
memcpy(buf, bufQueue + start, bytesgot);
} else {
int size = bufQueueSize - start;
memcpy(buf, bufQueue + start, size);
memcpy(buf + size, bufQueue, bytesgot - size);
int firstSize = bufQueueSize - start;
memcpy(buf, bufQueue + start, firstSize);
memcpy(buf + firstSize, bufQueue, bytesgot - firstSize);
}
}
start = (start + bytesgot) % bufQueueSize;