add function to help set session read codec to slinear

src/include/switch_core.h

@@ -116,7 +116,6 @@ struct switch_core_session;
 struct switch_core_runtime;
 struct switch_core_port_allocator;
 
-
 /*!
   \defgroup core1 Core Library 
   \ingroup FREESWITCH
@@ -713,6 +712,7 @@ SWITCH_DECLARE(void) switch_core_session_soft_lock(switch_core_session_t *sessio
 SWITCH_DECLARE(void) switch_core_session_soft_unlock(switch_core_session_t *session);
 SWITCH_DECLARE(void) switch_core_session_set_dmachine(switch_core_session_t *session, switch_ivr_dmachine_t *dmachine);
 SWITCH_DECLARE(switch_ivr_dmachine_t *) switch_core_session_get_dmachine(switch_core_session_t *session);
+SWITCH_DECLARE(switch_status_t) switch_core_session_set_codec_slin(switch_core_session_t *session, switch_slin_data_t *data);
 
 /*! 
   \brief Retrieve the unique identifier from the core

src/include/switch_module_interfaces.h

@@ -711,6 +711,14 @@ struct switch_api_interface {
 #define PROTECT_INTERFACE(_it) if (_it) {switch_mutex_lock(_it->reflock); switch_thread_rwlock_rdlock(_it->parent->rwlock); switch_thread_rwlock_rdlock(_it->rwlock); _it->refs++; _it->parent->refs++; switch_mutex_unlock(_it->reflock);}	//if (!strcmp(_it->interface_name, "user")) switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "+++++++++++LOCK %s %d/%d\n", _it->interface_name, _it->refs, _it->parent->refs);
 #define UNPROTECT_INTERFACE(_it) if (_it) {switch_mutex_lock(_it->reflock); switch_thread_rwlock_unlock(_it->rwlock); switch_thread_rwlock_unlock(_it->parent->rwlock); _it->refs--; _it->parent->refs--; switch_mutex_unlock(_it->reflock);}	//if (!strcmp(_it->interface_name, "user")) switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "---------UNLOCK %s %d/%d\n", _it->interface_name, _it->refs, _it->parent->refs);
 
+#include "switch_frame.h"
+
+struct switch_slin_data {
+	switch_core_session_t *session;
+	switch_frame_t write_frame;
+	switch_codec_t codec;
+	char frame_data[SWITCH_RECOMMENDED_BUFFER_SIZE];
+};
 
 SWITCH_END_EXTERN_C
 #endif

src/include/switch_types.h

@@ -1817,6 +1817,8 @@ typedef struct switch_loadable_module_function_table {
 
 typedef int (*switch_modulename_callback_func_t) (void *user_data, const char *module_name);
 
+typedef struct switch_slin_data switch_slin_data_t;
+
 #define SWITCH_MODULE_DEFINITION_EX(name, load, shutdown, runtime, flags)					\
 static const char modname[] =  #name ;														\
 SWITCH_MOD_DECLARE_DATA switch_loadable_module_function_table_t name##_module_interface = {	\

src/switch_core_session.c

@@ -58,6 +58,39 @@ SWITCH_DECLARE(void) switch_core_session_soft_unlock(switch_core_session_t *sess
 	session->soft_lock = 0;
 }
 
+SWITCH_DECLARE(switch_status_t) switch_core_session_set_codec_slin(switch_core_session_t *session, switch_slin_data_t *data)
+													
+{
+	switch_codec_implementation_t read_impl = { 0 };
+	int interval;
+
+	switch_core_session_get_read_impl(session, &read_impl);
+	interval = read_impl.microseconds_per_packet / 1000;
+	data->session = session;
+
+	if (switch_core_codec_init(&data->codec,
+							   "L16",
+							   NULL,
+							   read_impl.actual_samples_per_second,
+							   interval,
+							   1, SWITCH_CODEC_FLAG_ENCODE | SWITCH_CODEC_FLAG_DECODE, NULL, NULL) == SWITCH_STATUS_SUCCESS) {
+		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session),
+						  SWITCH_LOG_DEBUG, "Codec Activated L16@%uhz %dms\n", read_impl.actual_samples_per_second, interval);
+
+		memset(&data->write_frame, 0, sizeof(data->write_frame));
+
+		data->write_frame.codec = &data->codec;
+		data->write_frame.data = data->frame_data;
+		data->write_frame.buflen = sizeof(data->frame_data);
+		data->write_frame.datalen = 0;
+		switch_core_session_set_read_codec(session, &data->codec);
+		return SWITCH_STATUS_SUCCESS;
+	}
+
+	return SWITCH_STATUS_FALSE;
+}
+
+
 #ifdef SWITCH_DEBUG_RWLOCKS
 SWITCH_DECLARE(switch_core_session_t *) switch_core_session_perform_locate(const char *uuid_str, const char *file, const char *func, int line)
 #else