--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/layer1/gtt_include/ctm/fifo.h	Fri May 15 01:28:16 2020 +0000
@@ -0,0 +1,218 @@
+/*
+*******************************************************************************
+*
+*      COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
+*      90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100
+*
+*      The program(s) may be used and/or copied only with the
+*      written permission from Ericsson or in accordance
+*      with the terms and conditions stipulated in the agreement or
+*      contract under which the program(s) have been supplied.
+*
+*******************************************************************************
+*
+*      File             : fifo.h
+*      Author           : Matthias Doerbecker
+*      Tested Platforms : DEC Alpha 250 4/266 (OSF/1 3.2)
+*      Description      : File I/O for float and double (32/64 bit signed) 
+*                         values. 
+*
+*      Revision history
+*
+*      Rev  Date       Name            Description
+*      -------------------------------------------------------------------
+*      pA1  12-MAR-97  M.Doerbecker    initial version
+*                                      (based on shortio.h pA2)
+*
+*******************************************************************************
+*/
+#ifndef fifo_h
+#define fifo_h "$Id: $"
+
+/*
+*******************************************************************************
+*                         INCLUDE FILES
+*******************************************************************************
+*/
+
+#include "ctm_typedefs.h"
+/*
+*******************************************************************************
+*                         DEFINITION OF CONSTANTS
+*******************************************************************************
+*/
+
+/*
+*******************************************************************************
+*                         DEFINITION OF DATA TYPES
+*******************************************************************************
+*/
+
+// typedef float Float;
+// typedef char Char;
+
+typedef enum {SHORTINT_FIFO, FLOAT_FIFO, CHAR_FIFO} fifo_type_t;
+
+
+/* fifo_state_t is the state variable type that is used for both types */
+/* of fifo structures: Shortint_fifo as well as Float_fifo.            */
+
+typedef struct
+{
+  WORD16    *buffer_Shortint;  /* buffer for Shortint_fifo_xxx()           */
+  Float       *buffer_Float;     /* buffer for Float_fifo_xxx()              */
+  Char        *buffer_Char;      /* buffer for Char_fifo_xxx()               */
+  WORD32     length_buffer;     /* maximum length of the fifo buffer        */
+  WORD32     num_entries_actual;/* actual number of elements in fifo        */
+  fifo_type_t fifo_type;         /* either SHORTINT_FIFO or FLOAT_FIFO       */
+  WORD32     magic_number;      /* for detecting wheter fifo is initialized */
+}
+fifo_state_t;
+
+/*
+*******************************************************************************
+*                         DECLARATION OF PROTOTYPES
+*******************************************************************************
+*/
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_init
+*     In              : length_fifo   determines maximukm length of the buffer
+*     Out             : fifo_state    initialized state variable
+*     Calls           : calloc, fprintf, exit
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : 0 on success, 1 in case of an error
+*     Information     : initialization of a fifo structure for buffering 
+*                       Shortint data
+*
+*******************************************************************************
+*/
+
+int Shortint_fifo_init(fifo_state_t *fifo_state,
+                       WORD32      length_fifo);
+
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_reset
+*     In              : 
+*     In/Out          : fifo_state    initialized state variable
+*     Calls           : <none>
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : 0 on success, 1 in case of an error
+*     Information     : reset of the fifo structure, i.e. all buffered 
+*                       elements are removed
+*
+*******************************************************************************
+*/
+
+int Shortint_fifo_reset(fifo_state_t *fifo_state);
+
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_exit
+*     In              : length_fifo   determines maximum length of the buffer
+*     In/Out          : fifo_state    initialized state variable
+*     Calls           : free, fprintf, exit
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : 0 on success, 1 in case of an error
+*     Information     : shuts down fifo structure, frees allocated memory
+*
+*******************************************************************************
+*/
+
+int Shortint_fifo_exit(fifo_state_t *fifo_state);
+
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_push
+*     In              : elements_to_push        vector containing the elements
+*     In                num_elements_to_push    number of the elements
+*     In/Out          : fifo_state              state variable
+*     Calls           : fprintf, exit
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : 0 on success, 1 in case of an error
+*     Information     : pushes elements into the fifo
+*
+*******************************************************************************
+*/
+
+int Shortint_fifo_push(fifo_state_t *fifo_state, 
+                       WORD16     *elements_to_push,
+                       WORD32      num_elements_to_push);
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_pop
+*     In              : num_elements_to_pop     number of the elements
+*     Out             : popped_elements         vector containing the elements
+*     In/Out          : fifo_state              state variable
+*     Calls           : fprintf, exit
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : 0 on success, 1 in case of an error
+*     Information     : pops elements from the fifo
+*
+*******************************************************************************
+*/
+
+int Shortint_fifo_pop(fifo_state_t *fifo_state, 
+                      WORD16     *popped_elements,
+                      WORD32      num_elements_to_pop);
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_peek
+*     In              : num_elements_to_peek    number of the elements
+*     Out             : peeked_elements         vector containing the elements
+*     In/Out          : fifo_state              state variable
+*     Calls           : fprintf, exit
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : 0 on success, 1 in case of an error
+*     Information     : similar to pop, but elements are remaining in buffer
+*
+*******************************************************************************
+*/
+
+int Shortint_fifo_peek(fifo_state_t *fifo_state, 
+                       WORD16     *peeked_elements,
+                       WORD32      num_elements_to_peek);
+
+
+/*
+*******************************************************************************
+*
+*     Function        : Shortint_fifo_check
+*     In/Out          : fifo_state              state variable
+*     Calls           : <none>
+*     Tables          : <none>
+*     Compile Defines : <none>
+*     Return          : number of elements in fifo
+*     Information     : determines the number of valid elements in fifo
+*
+*******************************************************************************
+*/
+
+WORD32 Shortint_fifo_check(fifo_state_t *fifo_state);
+
+#endif