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+/* ------------------------------------------------------------------
+ * Copyright (C) 1998-2009 PacketVideo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ * -------------------------------------------------------------------
+ */
+/****************************************************************************************
+Portions of this file are derived from the following 3GPP standard:
+
+ 3GPP TS 26.073
+ ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec
+ Available from http://www.3gpp.org
+
+(C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC)
+Permission to distribute, modify and use this file under the standard license
+terms listed above has been obtained from the copyright holder.
+****************************************************************************************/
+/*
+
+
+
+
+ Filename: /audio/gsm_amr/c/src/prm2bits.c
+
+ Date: 02/04/2002
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+ Description: Improved the code as per review comments.
+
+ Description: For Int2bin() and Prm2bits()
+ 1. Eliminated unused include file typedef.h.
+ 2. Replaced array addressing by pointers
+ 3. Changed to decrement loops
+
+ Description: Replaced "int" and/or "char" with OSCL defined types.
+
+ Description:
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; INCLUDES
+----------------------------------------------------------------------------*/
+#include "prm2bits.h"
+#include "mode.h"
+#include "bitno_tab.h"
+
+
+/*----------------------------------------------------------------------------
+; MACROS
+; [Define module specific macros here]
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; DEFINES
+; [Include all pre-processor statements here. Include conditional
+; compile variables also.]
+----------------------------------------------------------------------------*/
+#define MASK 0x0001
+/*----------------------------------------------------------------------------
+; LOCAL FUNCTION DEFINITIONS
+; [List function prototypes here]
+----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+; LOCAL VARIABLE DEFINITIONS
+; [Variable declaration - defined here and used outside this module]
+----------------------------------------------------------------------------*/
+
+/*
+------------------------------------------------------------------------------
+ FUNCTION NAME: Int2bin
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+ Inputs:
+ value = value to be converted to binary of type Word16
+ no_of_bits = number of bits associated with value of type Word16
+
+ Outputs:
+ bitstream = pointer to address where bits are written of type Word16
+
+ Returns:
+ None
+
+ Global Variables Used:
+ None
+
+ Local Variables Needed:
+ None
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+ FUNCTION: Int2bin
+
+ PURPOSE: convert integer to binary and write the bits to the array
+ bitstream[]. The most significant bits are written first.
+
+------------------------------------------------------------------------------
+ REQUIREMENTS
+
+ None
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+ prm2bits.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
+
+------------------------------------------------------------------------------
+ PSEUDO-CODE
+
+static void Int2bin (
+ Word16 value, // input : value to be converted to binary
+ Word16 no_of_bits, // input : number of bits associated with value
+ Word16 *bitstream // output: address where bits are written
+)
+{
+ Word16 *pt_bitstream, i, bit;
+
+ pt_bitstream = &bitstream[no_of_bits];
+
+ for (i = 0; i < no_of_bits; i++)
+ {
+ bit = value & MASK;
+ if (bit == 0)
+ {
+ *--pt_bitstream = BIT_0;
+ }
+ else
+ {
+ *--pt_bitstream = BIT_1;
+ }
+ value = shr (value, 1);
+ }
+}
+
+------------------------------------------------------------------------------
+ RESOURCES USED [optional]
+
+ When the code is written for a specific target processor the
+ the resources used should be documented below.
+
+ HEAP MEMORY USED: x bytes
+
+ STACK MEMORY USED: x bytes
+
+ CLOCK CYCLES: (cycle count equation for this function) + (variable
+ used to represent cycle count for each subroutine
+ called)
+ where: (cycle count variable) = cycle count for [subroutine
+ name]
+
+------------------------------------------------------------------------------
+ CAUTION [optional]
+ [State any special notes, constraints or cautions for users of this function]
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; FUNCTION CODE
+----------------------------------------------------------------------------*/
+static void Int2bin(
+ Word16 value, /* input : value to be converted to binary */
+ Word16 no_of_bits, /* input : number of bits associated with value */
+ Word16 *bitstream /* output: address where bits are written */
+)
+{
+ Word16 *pt_bitstream;
+ Word16 i;
+
+ pt_bitstream = &bitstream[no_of_bits-1];
+
+ for (i = no_of_bits; i != 0; i--)
+ {
+ *(pt_bitstream--) = value & MASK;
+ value >>= 1;
+ }
+
+}
+
+
+/*
+------------------------------------------------------------------------------
+ FUNCTION NAME: prm2bits
+------------------------------------------------------------------------------
+ INPUT AND OUTPUT DEFINITIONS
+
+ Inputs:
+ mode = AMR mode of type enum Mode
+ prm[] = pointer to analysis parameters of type Word16
+
+ Outputs:
+ bits[] = pointer to serial bits of type Word16
+
+ Returns:
+ None
+
+ Global Variables Used:
+ None
+
+ Local Variables Needed:
+ None
+
+------------------------------------------------------------------------------
+ FUNCTION DESCRIPTION
+
+ FUNCTION: Prm2bits
+
+ PURPOSE: converts the encoder parameter vector into a vector of serial
+ bits.
+
+ DESCRIPTION: depending on the mode, different numbers of parameters
+ (with differing numbers of bits) are processed. Details
+ are found in bitno.tab
+
+------------------------------------------------------------------------------
+ REQUIREMENTS
+
+ None
+
+------------------------------------------------------------------------------
+ REFERENCES
+
+ prm2bits.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
+
+------------------------------------------------------------------------------
+ PSEUDO-CODE
+
+void Prm2bits (
+ enum Mode mode, // i : AMR mode
+ Word16 prm[], // i : analysis parameters (size <= MAX_PRM_SIZE)
+ Word16 bits[] // o : serial bits (size <= MAX_SERIAL_SIZE)
+)
+{
+ Word16 i;
+
+ for (i = 0; i < prmno[mode]; i++)
+ {
+ Int2bin (prm[i], bitno[mode][i], bits);
+ bits += bitno[mode][i];
+ add(0,0); // account for above pointer update
+ }
+
+ return;
+}
+
+------------------------------------------------------------------------------
+ RESOURCES USED [optional]
+
+ When the code is written for a specific target processor the
+ the resources used should be documented below.
+
+ HEAP MEMORY USED: x bytes
+
+ STACK MEMORY USED: x bytes
+
+ CLOCK CYCLES: (cycle count equation for this function) + (variable
+ used to represent cycle count for each subroutine
+ called)
+ where: (cycle count variable) = cycle count for [subroutine
+ name]
+
+------------------------------------------------------------------------------
+ CAUTION [optional]
+ [State any special notes, constraints or cautions for users of this function]
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; FUNCTION CODE
+----------------------------------------------------------------------------*/
+void Prm2bits(
+ enum Mode mode, /* i : AMR mode */
+ Word16 prm[], /* i : analysis parameters (size <= MAX_PRM_SIZE) */
+ Word16 bits[] /* o : serial bits (size <= MAX_SERIAL_SIZE) */
+)
+{
+ Word16 i;
+ const Word16 *p_mode;
+ Word16 *p_prm;
+
+ p_mode = &bitno[mode][0];
+ p_prm = &prm[0];
+
+ for (i = prmno[mode]; i != 0; i--)
+ {
+ Int2bin(*(p_prm++), *(p_mode), bits);
+ bits += *(p_mode++);
+ }
+
+ return;
+}
+
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