From 506bb988795fc3e72b3c176617f4cb6568b3672f Mon Sep 17 00:00:00 2001
From: Jan Grewe <jan.grewe@g-node.org>
Date: Fri, 13 Mar 2020 11:58:34 +0100
Subject: [PATCH] [buffer] add method to read last image
---
imagebuffer.cpp | 18 +++++++++++++++++-
imagebuffer.h | 1 +
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/imagebuffer.cpp b/imagebuffer.cpp
index da01b3f..2af6bfb 100644
--- a/imagebuffer.cpp
+++ b/imagebuffer.cpp
@@ -46,7 +46,7 @@ void ImageBuffer::push(const MyImage &img) {
if (load < static_cast<int64_t>(buffer.capacity()))
load += 1;
mutex.unlock();
- std::cerr << "load: " << bufferLoad() << "\t pressure: " << bufferPreassure() << std::endl;
+ //std::cerr << "load: " << bufferLoad() << "\t pressure: " << bufferPreassure() << std::endl;
}
bool ImageBuffer::bufferNotEmpty() {
@@ -69,3 +69,19 @@ bool ImageBuffer::pop(MyImage &img) {
return ret;
}
+bool ImageBuffer::readLast(MyImage &img) {
+ bool ret = false;
+ mutex.lock();
+ if (load > 0) {
+ size_t idx;
+ if (current_write_index != 0) {
+ idx = static_cast<size_t>(current_write_index) - 1;
+ } else {
+ idx = buffer.capacity() -1;
+ }
+ img = buffer[idx];
+ ret = true;
+ }
+ mutex.unlock();
+ return ret;
+}
diff --git a/imagebuffer.h b/imagebuffer.h
index 1d5e708..8b272a3 100644
--- a/imagebuffer.h
+++ b/imagebuffer.h
@@ -17,6 +17,7 @@ public:
void resize(size_t new_size);
void push(const MyImage &img);
bool pop(MyImage &img);
+ bool readLast(MyImage &img);
size_t capacity();
double bufferPreassure();
int64_t bufferLoad();