Show PSRAM usage (#2206)

* centralize PSRAM usage (application code only)

* update logging

* update logging

* fix use after free

* initialize buffer

* free rgb_image before ussing it for new allocation

* use wrapper function

* switch log level to debug

* .

* undo adding free() calls

* .

* add names to all CImage instances

* .

* .

* .

* revert changes of stbi_image_free() with free_psram_heap() on the places where is is not in PSRAM

* .

* typos

* typo

* Added MQTT Outbox explanation/warning

* added CONFIG_SPIRAM_USE_MEMMAP explanation

---------

Co-authored-by: CaCO3 <caco@ruinelli.ch>

code/components/jomjol_helper/psram.cpp

@@ -0,0 +1,42 @@
+#include "ClassLogFile.h"
+#include "esp_heap_caps.h"
+
+static const char* TAG = "PSRAM";
+
+using namespace std;
+
+
+void *malloc_psram_heap(std::string name, size_t size, uint32_t caps) {
+	void *ptr;
+
+	ptr = heap_caps_malloc(size, caps);
+    if (ptr != NULL) {
+	    LogFile.WriteToFile(ESP_LOG_DEBUG, TAG, "Allocated " + to_string(size) + " bytes in PSRAM for '" + name + "'");
+	}
+    else {
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to allocate " + to_string(size) + " bytes in PSRAM for '" + name + "'!");
+    }
+
+	return ptr;
+}
+
+
+void *calloc_psram_heap(std::string name, size_t n, size_t size, uint32_t caps) {
+	void *ptr;
+
+	ptr = heap_caps_calloc(n, size, caps);
+    if (ptr != NULL) {
+	    LogFile.WriteToFile(ESP_LOG_DEBUG, TAG, "Allocated " + to_string(size) + " bytes in PSRAM for '" + name + "'");
+	}
+    else {
+        LogFile.WriteToFile(ESP_LOG_ERROR, TAG, "Failed to allocate " + to_string(size) + " bytes in PSRAM for '" + name + "'!");
+    }
+
+	return ptr;
+}
+
+
+void free_psram_heap(std::string name, void *ptr) {
+    LogFile.WriteToFile(ESP_LOG_DEBUG, TAG, "Freeing memory in PSRAM used for '" + name + "'...");
+    heap_caps_free(ptr);
+}