From 96df5c64a03de57732eb61c3f65c4e17d14c6688 Mon Sep 17 00:00:00 2001
From: Jonas Suhr Christensen <jsc@umbraculum.org>
Date: Fri, 10 Apr 2015 16:28:03 +0200
Subject: Added unit test shell for cachemanager. Added cache manager logic -
 still needing audio related code.

---
 src/cachemanager.cc | 107 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 105 insertions(+), 2 deletions(-)

(limited to 'src/cachemanager.cc')

diff --git a/src/cachemanager.cc b/src/cachemanager.cc
index 2e9eab9..5e2adf0 100644
--- a/src/cachemanager.cc
+++ b/src/cachemanager.cc
@@ -3,8 +3,8 @@
  *            cachemanager.cc
  *
  *  Fri Apr 10 10:39:24 CEST 2015
- *  Copyright 2015 Bent Bisballe Nyeng
- *  deva@aasimon.org
+ *  Copyright 2015 Jonas Suhr Christensen 
+ *  jsc@umbraculum.org
  ****************************************************************************/
 
 /*
@@ -26,3 +26,106 @@
  */
 #include "cachemanager.h"
 
+#include <stdio.h>
+
+CacheManager::CacheManager()
+{
+}
+
+CacheManager::~CacheManager()
+{
+  wait_stop();
+}
+
+void CacheManager::init(int poolsize)
+{
+  id2cache.resize(poolsize);
+  for(int i = 0; i < poolsize; i++) {
+    availableids.push_back(i);
+  }
+
+  running = true;
+  run();
+}
+
+// Invariant: initial_samples_needed < preloaded audio data 
+sample_t *CacheManager::open(AudioFile *file, int initial_samples_needed, int channel, cacheid_t &id) 
+{
+  // What if no free ids is available?
+  m_ids.lock(); 
+  id = availableids.front();
+  availableids.pop_front();
+  m_ids.unlock();
+
+  cache_t c;
+  c.file = file;
+  c.channel = channel;
+  c.pos = initial_samples_needed;
+  // Allocate buffers
+  // Increase audio ref count
+
+  id2cache[id] = c;
+ 
+  event_t e;
+  e.id = id;
+  pushEvent(e);
+
+  return file->data;
+}
+
+void CacheManager::close(cacheid_t id)
+{
+  m_ids.lock();
+  availableids.push_back(id);
+  m_ids.unlock();
+
+  // Clean cache_t mapped to event
+  // Clean event list for other events mapped to this id?
+  //    Maybe we need an event for this, that we can push in front of eventqueue (con: we dont read from disk when doing this stuff).
+  // Decrement audiofile ref count
+}
+
+sample_t *CacheManager::next(cacheid_t id, size_t &size) 
+{
+  sample_t *s = NULL;
+  return s;   
+}
+
+void CacheManager::loadNext(cacheid_t id) 
+{
+  printf("Loading next...\n");
+
+  // If more is left of file 
+  if(false) {
+    event_t e; 
+    e.id = id;
+    pushEvent(e);
+  }
+}
+
+void CacheManager::thread_main()
+{
+  while(running) {
+    sem.wait();
+    
+    m_events.lock();
+    if(eventqueue.empty()) {
+      event_t e = eventqueue.front();
+      eventqueue.pop_front();
+      m_events.unlock();
+    
+      loadNext(e.id);      
+    }
+    else {
+      m_events.unlock();
+    } 
+  }
+}
+
+void CacheManager::pushEvent(event_t e)
+{
+  // Check that if event should be merged (Maybe by event queue (ie. push in front).
+  m_events.lock();
+  eventqueue.push_back(e);
+  m_events.unlock();
+}
-- 
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