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Diffstat (limited to 'media/libstagefright/codecs/amrnb/common/src/round.cpp')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/common/src/round.cpp | 195 |
1 files changed, 0 insertions, 195 deletions
diff --git a/media/libstagefright/codecs/amrnb/common/src/round.cpp b/media/libstagefright/codecs/amrnb/common/src/round.cpp deleted file mode 100644 index 71d1702..0000000 --- a/media/libstagefright/codecs/amrnb/common/src/round.cpp +++ /dev/null @@ -1,195 +0,0 @@ -/* ------------------------------------------------------------------ - * 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/round.c - ------------------------------------------------------------------------------- - REVISION HISTORY - - Description: Created separate file for the round function. Sync'ed up - with the current template and fixed tabs. - - Description: Made changes based on review meeting: - 1. Removed long in Inputs Definitions. - 2. Changed L_var1 to var_out and description in - Output Definitions. - - Description: Added a parameter to the function interface, pOverflow which is - a pointer to the overflow flag. This flag is required by the - L_add() function invoked by round(). - Removed code that updates the MOPS counter. - Created a new return variable result. - - Description: Removed embedded tabs. Included comment in the Pseudo code - Section about using pointer to overflow flag in the actual - implementation instead of using a global flag. - - Description: Changed function name to pv_round to avoid conflict with - round function in C standard library. - - Who: Date: - Description: - ------------------------------------------------------------------------------- - MODULE DESCRIPTION - - Rounding function with saturation. - ------------------------------------------------------------------------------- -*/ - -/*---------------------------------------------------------------------------- -; INCLUDES -----------------------------------------------------------------------------*/ -#include "basic_op.h" - -/*---------------------------------------------------------------------------- -; MACROS -; [Define module specific macros here] -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; DEFINES -; [Include all pre-processor statements here. Include conditional -; compile variables also.] -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; LOCAL FUNCTION DEFINITIONS -; [List function prototypes here] -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; LOCAL VARIABLE DEFINITIONS -; [Variable declaration - defined here and used outside this module] -----------------------------------------------------------------------------*/ - -/* ------------------------------------------------------------------------------- - FUNCTION NAME: pv_round ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - L_var1 = 32 bit signed integer (Word32) whose value falls - in the range : 0x8000 0000 <= L_var1 <= 0x7fff ffff. - - pOverflow = pointer to overflow (Flag) - - Outputs: - None - - Returns: - result = MS 16 bits of rounded input L_var1. - - Global Variables Used: - None - - Local Variables Needed: - None - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - This function rounds the lower 16 bits of the 32 bit input number into the - MS 16 bits with saturation. Shift the resulting bits right by 16 and return - the 16 bit number: - pv_round(L_var1) = extract_h(L_add(L_var1,32768)) - ------------------------------------------------------------------------------- - REQUIREMENTS - - None - ------------------------------------------------------------------------------- - REFERENCES - - [1] round() function in basic_op2.c, UMTS GSM AMR speech codec, R99 - - Version 3.2.0, March 2, 2001 - ------------------------------------------------------------------------------- - PSEUDO-CODE - -Word16 pv_round (Word32 L_var1) -{ - Word16 var_out; - Word32 L_rounded; - -* The reference ETSI code uses a global flag for Overflow in the L_add() function. -* In the actual implementation a pointer to Overflow flag is passed in as a -* parameter to the function. - - L_rounded = L_add (L_var1, (Word32) 0x00008000L); -#if (WMOPS) - multiCounter[currCounter].L_add--; -#endif - var_out = extract_h (L_rounded); -#if (WMOPS) - multiCounter[currCounter].extract_h--; - multiCounter[currCounter].round++; -#endif - return (var_out); -} - ------------------------------------------------------------------------------- - 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 -----------------------------------------------------------------------------*/ -Word16 pv_round(register Word32 L_var1, Flag *pOverflow) -{ - Word16 result; - - L_var1 = L_add(L_var1, (Word32) 0x00008000L, pOverflow); - result = (Word16)(L_var1 >> 16); - - return (result); -} |