diff options
Diffstat (limited to 'media/libstagefright/codecs/amrnb/dec/src/d_plsf.cpp')
-rw-r--r-- | media/libstagefright/codecs/amrnb/dec/src/d_plsf.cpp | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrnb/dec/src/d_plsf.cpp b/media/libstagefright/codecs/amrnb/dec/src/d_plsf.cpp new file mode 100644 index 0000000..138193f --- /dev/null +++ b/media/libstagefright/codecs/amrnb/dec/src/d_plsf.cpp @@ -0,0 +1,207 @@ +/* ------------------------------------------------------------------ + * 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. +****************************************************************************************/ +/* +------------------------------------------------------------------------------ + + + + Pathname: ./audio/gsm-amr/c/src/d_plsf.c + Functions: + + + Date: 04/14/2000 + +------------------------------------------------------------------------------ + REVISION HISTORY + + Description: Removed the functions d_plsf_init and d_plsf_exit. + The d_plsf related structure is no longer dynamically allocated. + + Description: Removed q_plsf_5.tab from Include section and added + q_plsf_5_tbl.h to Include section. Changed "mean_lsf" + to "mean_lsf_5" in D_plsf_reset(). + + Description: Replaced OSCL mem type functions and eliminated include + files that now are chosen by OSCL definitions + + Description: Replaced "int" and/or "char" with OSCL defined types. + + Description: + +------------------------------------------------------------------------------ + MODULE DESCRIPTION + + common part (reset) of LSF decoder + module (rest in d_plsf_3.c and d_plsf_5.c) +------------------------------------------------------------------------------ +*/ + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ +#include "typedef.h" +#include "basic_op.h" +#include "cnst.h" +#include "copy.h" +#include "d_plsf.h" +#include "q_plsf_5_tbl.h" + + +/*---------------------------------------------------------------------------- +; MACROS +; Define module specific macros here +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; DEFINES +; Include all pre-processor statements here. Include conditional +; compile variables also. +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL FUNCTION DEFINITIONS +; Function Prototype declaration +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; LOCAL VARIABLE DEFINITIONS +; Variable declaration - defined here and used outside this module +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; EXTERNAL FUNCTION REFERENCES +; Declare functions defined elsewhere and referenced in this module +----------------------------------------------------------------------------*/ + +/*---------------------------------------------------------------------------- +; EXTERNAL VARIABLES REFERENCES +; Declare variables used in this module but defined elsewhere +----------------------------------------------------------------------------*/ + +/* +------------------------------------------------------------------------------ + FUNCTION NAME: D_plsf_reset +------------------------------------------------------------------------------ + INPUT AND OUTPUT DEFINITIONS + + Inputs: + state = pointer to structure of type D_plsf_reset + + Outputs: + fields of the structure pointed to by state is initialized to zero + + Returns: + return_value = 0, if reset was successful; -1, otherwise (int) + + Global Variables Used: + None + + Local Variables Needed: + None + +------------------------------------------------------------------------------ + FUNCTION DESCRIPTION + + Resets state memory + +------------------------------------------------------------------------------ + REQUIREMENTS + + None + +------------------------------------------------------------------------------ + REFERENCES + + d_plsf.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 + +------------------------------------------------------------------------------ + PSEUDO-CODE + +int D_plsf_reset (D_plsfState *state) +{ + Word16 i; + + if (state == (D_plsfState *) NULL){ + // fprintf(stderr, "D_plsf_reset: invalid parameter\n"); + return -1; + } + + for (i = 0; i < M; i++){ + state->past_r_q[i] = 0; // Past quantized prediction error + } + + // Past dequantized lsfs + Copy(mean_lsf, &state->past_lsf_q[0], M); + + return 0; +} +------------------------------------------------------------------------------ + 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] + +------------------------------------------------------------------------------ +*/ + +Word16 D_plsf_reset(D_plsfState *state) +{ + Word16 i; + + if (state == (D_plsfState *) NULL) + { + /* fprintf(stderr, "D_plsf_reset: invalid parameter\n"); */ + return -1; + } + + for (i = 0; i < M; i++) + { + state->past_r_q[i] = 0; /* Past quantized prediction error */ + } + + /* Past dequantized lsfs */ + Copy(mean_lsf_5, &state->past_lsf_q[0], M); + + return 0; + +} |