Prefer dynamic allocations over large STATIC arrays

 - Use dynamically allocated WSS URL
 - Use dynamic allocations for singaling payload
 - Use required only allocations in LwsApiCalls instead large static arrays

Author: vikramdattu

CMakeLists.txt

@@ -23,6 +23,7 @@ option(INSTRUMENTED_ALLOCATORS "Enable memory instrumentation" OFF)
 option(ENABLE_AWS_SDK_IN_TESTS "Enable support for compiling AWS SDKs for tests" ON)
 option(ENABLE_STATS_CALCULATION_CONTROL "Enable support for runtime control of ice agent stat calculations." OFF)
 option(BUILD_OLD_MBEDTLS_VERSION "Use MbedTLS version 2.28.8." OFF)
+option(PREFER_DYNAMIC_ALLOCS "Prefer dynamic allocations for payloads and URLs" OFF)
 
 # Developer Flags
 option(BUILD_TEST "Build the testing tree." OFF)
@@ -133,6 +134,10 @@ if (ENABLE_STATS_CALCULATION_CONTROL)
   add_definitions(-DENABLE_STATS_CALCULATION_CONTROL)
 endif()
 
+if (PREFER_DYNAMIC_ALLOCS)
+  add_definitions(-DPREFER_DYNAMIC_ALLOCS=1)
+endif()
+
 if(USE_OPENSSL)
   add_definitions(-DKVS_USE_OPENSSL)
 elseif(USE_MBEDTLS)

src/include/com/amazonaws/kinesis/video/webrtcclient/Include.h

@@ -1279,6 +1279,21 @@ typedef struct {
                                                               //!<
 } RtcIceCandidateInit, *PRtcIceCandidateInit;
 
+/**
+ * @brief Define this macro to use dynamically allocated payload in SignalingMessage
+ * This can be useful for platforms with limited memory as it avoids allocating
+ * MAX_SIGNALING_MESSAGE_LEN for each message when only a small payload is needed
+ */
+
+/**
+ * @brief If PREFER_DYNAMIC_ALLOCS is set to 1, use dynamic allocation for signaling payload
+ * Otherwise, use the existing DYNAMIC_SIGNALING_PAYLOAD setting
+ */
+#if PREFER_DYNAMIC_ALLOCS
+#define DYNAMIC_SIGNALING_PAYLOAD 1
+#define USE_DYNAMIC_URL 1
+#endif
+
 /**
  * @brief Structure defining the basic signaling message
  */
@@ -1293,7 +1308,11 @@ typedef struct {
 
     UINT32 payloadLen; //!< Optional payload length. If 0, the length will be calculated
 
+#ifdef DYNAMIC_SIGNALING_PAYLOAD
+    PCHAR payload; //!< Actual signaling message payload - dynamically allocated
+#else
     CHAR payload[MAX_SIGNALING_MESSAGE_LEN + 1]; //!< Actual signaling message payload
+#endif
 } SignalingMessage, *PSignalingMessage;
 
 /**