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Diffstat (limited to 'media/libstagefright/codecs/amrnb/dec/src/c_g_aver.cpp')
| -rw-r--r-- | media/libstagefright/codecs/amrnb/dec/src/c_g_aver.cpp | 648 |
1 files changed, 0 insertions, 648 deletions
diff --git a/media/libstagefright/codecs/amrnb/dec/src/c_g_aver.cpp b/media/libstagefright/codecs/amrnb/dec/src/c_g_aver.cpp deleted file mode 100644 index 91d3982..0000000 --- a/media/libstagefright/codecs/amrnb/dec/src/c_g_aver.cpp +++ /dev/null @@ -1,648 +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. -****************************************************************************************/ -/* ------------------------------------------------------------------------------- - - - - Pathname: ./audio/gsm-amr/c/src/c_g_aver.c - Functions: - Cb_gain_average_reset - Cb_gain_average - - Date: 03/28/2000 - ------------------------------------------------------------------------------- - REVISION HISTORY - - Description: Made some changes to the comments to match the comments from - other modules. - - Description: Made changes based on comments from the review meeting. - - Description: Synchronized file with UMTS version 3.2.0. Updated coding - template. - - Description: Made the following changes per comments from Phase 2/3 review: - 1. Defined one local variable per line. - - Description: Removed the functions Cb_gain_average_init and - Cb_gain_average_exit. The Cb_gain_average related structure is no longer - dynamically allocated. - - Description: Passing in pOverflow to comply with changes needed for EPOC - Updated the include files for the module. - - Description: Changed round function name to pv_round to avoid conflict with - round function in C standard library. - - - Description: Replaced OSCL mem type functions and eliminated include - files that now are chosen by OSCL definitions - - Description: ------------------------------------------------------------------------------- - MODULE DESCRIPTION - - This file contains functions that reset and perform - codebook gain calculations. - ------------------------------------------------------------------------------- -*/ - - -/*---------------------------------------------------------------------------- -; INCLUDES -----------------------------------------------------------------------------*/ -#include <string.h> - -#include "c_g_aver.h" -#include "typedef.h" -#include "mode.h" -#include "cnst.h" - -#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 -; Function Prototype declaration -----------------------------------------------------------------------------*/ - -/*---------------------------------------------------------------------------- -; LOCAL VARIABLE DEFINITIONS -; Variable declaration - defined here and used outside this module -----------------------------------------------------------------------------*/ - -/* ------------------------------------------------------------------------------- - FUNCTION NAME: Cb_gain_average_reset ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - state = pointer to a structure of type Cb_gain_averageState - - Outputs: - Structure pointed to by state is initialized to zeros - - Returns: - Returns 0 if memory was successfully initialized, - otherwise returns -1. - - Global Variables Used: - None. - - Local Variables Needed: - None. - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - Resets state memory - ------------------------------------------------------------------------------- - REQUIREMENTS - - None. - ------------------------------------------------------------------------------- - REFERENCES - - c_g_aver.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 - ------------------------------------------------------------------------------- - PSEUDO-CODE - -Word16 Cb_gain_average_reset (Cb_gain_averageState *state) -{ - if (state == (Cb_gain_averageState *) NULL){ - fprintf(stderr, "Cb_gain_average_reset: invalid parameter\n"); - return -1; - } - - // Static vectors to zero - Set_zero (state->cbGainHistory, L_CBGAINHIST); - - // Initialize hangover handling - state->hangVar = 0; - state->hangCount= 0; - - 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 Cb_gain_average_reset(Cb_gain_averageState *state) -{ - if (state == (Cb_gain_averageState *) NULL) - { - /* fprint(stderr, "Cb_gain_average_reset: invalid parameter\n"); */ - return(-1); - } - - /* Static vectors to zero */ - memset(state->cbGainHistory, 0, L_CBGAINHIST*sizeof(Word16)); - - /* Initialize hangover handling */ - state->hangVar = 0; - state->hangCount = 0; - - return(0); -} - -/****************************************************************************/ - -/* ------------------------------------------------------------------------------- - FUNCTION NAME: Cb_gain_average ------------------------------------------------------------------------------- - INPUT AND OUTPUT DEFINITIONS - - Inputs: - st = pointer to structure of type Cb_gain_averageState - mode = AMR mode (enum Mode) - gain_code = CB gain (Word16) - lsp = the LSP for the current frame (Word16) - lspAver = the average of LSP for 8 frames (Word16) - bfi = bad frame indication flag (Word16) - prev_bf = previous bad frame indication flag (Word16) - pdfi = potential degraded bad frame ind flag (Word16) - prev_pdf = prev pot. degraded bad frame ind flag (Word16) - inBackgroundNoise = background noise decision (Word16) - voicedHangover = # of frames after last voiced frame (Word16) - pOverflow = address of overflow (Flag) - - Returns: - cbGainMix = codebook gain (Word16) - - Outputs: - None. - - Global Variables Used: - None. - - Local Variables Needed: - None. - ------------------------------------------------------------------------------- - FUNCTION DESCRIPTION - - The mix cb gains for MR475, MR515, MR59, MR67, MR102; gain_code other modes - ------------------------------------------------------------------------------- - REQUIREMENTS - - None. - ------------------------------------------------------------------------------- - REFERENCES - - c_g_aver.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001 - ------------------------------------------------------------------------------- - PSEUDO-CODE - -Word16 Cb_gain_average ( - Cb_gain_averageState *st, // i/o : State variables for CB gain avergeing - enum Mode mode, // i : AMR mode - Word16 gain_code, // i : CB gain Q1 - Word16 lsp[], // i : The LSP for the current frame Q15 - Word16 lspAver[], // i : The average of LSP for 8 frames Q15 - Word16 bfi, // i : bad frame indication flag - Word16 prev_bf, // i : previous bad frame indication flag - Word16 pdfi, // i : potential degraded bad frame ind flag - Word16 prev_pdf, // i : prev pot. degraded bad frame ind flag - Word16 inBackgroundNoise, // i : background noise decision - Word16 voicedHangover // i : # of frames after last voiced frame - ) -{ - //---------------------------------------------------------* - * Compute mixed cb gain, used to make cb gain more * - * smooth in background noise for modes 5.15, 5.9 and 6.7 * - * states that needs to be updated by all * - *--------------------------------------------------------- - Word16 i; - Word16 cbGainMix, diff, tmp_diff, bgMix, cbGainMean; - Word32 L_sum; - Word16 tmp[M], tmp1, tmp2, shift1, shift2, shift; - - // set correct cbGainMix for MR74, MR795, MR122 - cbGainMix = gain_code; - - *-------------------------------------------------------* - * Store list of CB gain needed in the CB gain * - * averaging * - *-------------------------------------------------------* - for (i = 0; i < (L_CBGAINHIST-1); i++) - { - st->cbGainHistory[i] = st->cbGainHistory[i+1]; - } - st->cbGainHistory[L_CBGAINHIST-1] = gain_code; - - // compute lsp difference - for (i = 0; i < M; i++) { - tmp1 = abs_s(sub(lspAver[i], lsp[i])); // Q15 - shift1 = sub(norm_s(tmp1), 1); // Qn - tmp1 = shl(tmp1, shift1); // Q15+Qn - shift2 = norm_s(lspAver[i]); // Qm - tmp2 = shl(lspAver[i], shift2); // Q15+Qm - tmp[i] = div_s(tmp1, tmp2); // Q15+(Q15+Qn)-(Q15+Qm) - shift = sub(add(2, shift1), shift2); - if (shift >= 0) - { - tmp[i] = shr(tmp[i], shift); // Q15+Qn-Qm-Qx=Q13 - } - else - { - tmp[i] = shl(tmp[i], negate(shift)); // Q15+Qn-Qm-Qx=Q13 - } - } - - diff = tmp[0]; - for (i = 1; i < M; i++) { - diff = add(diff, tmp[i]); // Q13 - } - - // Compute hangover - if (sub(diff, 5325) > 0) // 0.65 in Q11 - { - st->hangVar = add(st->hangVar, 1); - } - else - { - st->hangVar = 0; - } - - if (sub(st->hangVar, 10) > 0) - { - st->hangCount = 0; // Speech period, reset hangover variable - } - - // Compute mix constant (bgMix) - bgMix = 8192; // 1 in Q13 - if ((sub(mode, MR67) <= 0) || (sub(mode, MR102) == 0)) - // MR475, MR515, MR59, MR67, MR102 - { - // if errors and presumed noise make smoothing probability stronger - if (((((pdfi != 0) && (prev_pdf != 0)) || (bfi != 0) || (prev_bf != 0)) && - (sub(voicedHangover, 1) > 0) && (inBackgroundNoise != 0) && - ((sub(mode, MR475) == 0) || - (sub(mode, MR515) == 0) || - (sub(mode, MR59) == 0)) )) - { - // bgMix = min(0.25, max(0.0, diff-0.55)) / 0.25; - tmp_diff = sub(diff, 4506); // 0.55 in Q13 - - // max(0.0, diff-0.55) - if (tmp_diff > 0) - { - tmp1 = tmp_diff; - } - else - { - tmp1 = 0; - } - - // min(0.25, tmp1) - if (sub(2048, tmp1) < 0) - { - bgMix = 8192; - } - else - { - bgMix = shl(tmp1, 2); - } - } - else - { - // bgMix = min(0.25, max(0.0, diff-0.40)) / 0.25; - tmp_diff = sub(diff, 3277); // 0.4 in Q13 - - // max(0.0, diff-0.40) - if (tmp_diff > 0) - { - tmp1 = tmp_diff; - } - else - { - tmp1 = 0; - } - - // min(0.25, tmp1) - if (sub(2048, tmp1) < 0) - { - bgMix = 8192; - } - else - { - bgMix = shl(tmp1, 2); - } - } - - if ((sub(st->hangCount, 40) < 0) || (sub(diff, 5325) > 0)) // 0.65 in Q13 - { - bgMix = 8192; // disable mix if too short time since - } - - // Smoothen the cb gain trajectory - // smoothing depends on mix constant bgMix - L_sum = L_mult(6554, st->cbGainHistory[2]); // 0.2 in Q15; L_sum in Q17 - for (i = 3; i < L_CBGAINHIST; i++) - { - L_sum = L_mac(L_sum, 6554, st->cbGainHistory[i]); - } - cbGainMean = pv_round(L_sum); // Q1 - - // more smoothing in error and bg noise (NB no DFI used here) - if (((bfi != 0) || (prev_bf != 0)) && (inBackgroundNoise != 0) && - ((sub(mode, MR475) == 0) || - (sub(mode, MR515) == 0) || - (sub(mode, MR59) == 0)) ) - { - L_sum = L_mult(4681, st->cbGainHistory[0]); // 0.143 in Q15; L_sum in Q17 - for (i = 1; i < L_CBGAINHIST; i++) - { - L_sum = L_mac(L_sum, 4681, st->cbGainHistory[i]); - } - cbGainMean = pv_round(L_sum); // Q1 - } - - // cbGainMix = bgMix*cbGainMix + (1-bgMix)*cbGainMean; - L_sum = L_mult(bgMix, cbGainMix); // L_sum in Q15 - L_sum = L_mac(L_sum, 8192, cbGainMean); - L_sum = L_msu(L_sum, bgMix, cbGainMean); - cbGainMix = pv_round(L_shl(L_sum, 2)); // Q1 - } - - st->hangCount = add(st->hangCount, 1); - return cbGainMix; -} - ------------------------------------------------------------------------------- - 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 Cb_gain_average( - Cb_gain_averageState *st, /* i/o : State variables for CB gain averaging */ - enum Mode mode, /* i : AMR mode */ - Word16 gain_code, /* i : CB gain Q1 */ - Word16 lsp[], /* i : The LSP for the current frame Q15 */ - Word16 lspAver[], /* i : The average of LSP for 8 frames Q15 */ - Word16 bfi, /* i : bad frame indication flag */ - Word16 prev_bf, /* i : previous bad frame indication flag */ - Word16 pdfi, /* i : potential degraded bad frame ind flag */ - Word16 prev_pdf, /* i : prev pot. degraded bad frame ind flag */ - Word16 inBackgroundNoise, /* i : background noise decision */ - Word16 voicedHangover, /* i : # of frames after last voiced frame */ - Flag *pOverflow -) -{ - Word16 i; - Word16 cbGainMix; - Word16 diff; - Word16 tmp_diff; - Word16 bgMix; - Word16 cbGainMean; - Word32 L_sum; - Word16 tmp[M]; - Word16 tmp1; - Word16 tmp2; - Word16 shift1; - Word16 shift2; - Word16 shift; - - /*---------------------------------------------------------* - * Compute mixed cb gain, used to make cb gain more * - * smooth in background noise for modes 5.15, 5.9 and 6.7 * - * states that needs to be updated by all * - *---------------------------------------------------------*/ - - /* set correct cbGainMix for MR74, MR795, MR122 */ - cbGainMix = gain_code; - - /*-------------------------------------------------------* - * Store list of CB gain needed in the CB gain * - * averaging * - *-------------------------------------------------------*/ - for (i = 0; i < (L_CBGAINHIST - 1); i++) - { - st->cbGainHistory[i] = st->cbGainHistory[i+1]; - } - st->cbGainHistory[L_CBGAINHIST-1] = gain_code; - - diff = 0; - - /* compute lsp difference */ - for (i = 0; i < M; i++) - { - tmp1 = abs_s(sub(*(lspAver + i), *(lsp + i), pOverflow)); - /* Q15 */ - shift1 = sub(norm_s(tmp1), 1, pOverflow); /* Qn */ - tmp1 = shl(tmp1, shift1, pOverflow); /* Q15+Qn */ - shift2 = norm_s(*(lspAver + i)); /* Qm */ - tmp2 = shl(*(lspAver + i), shift2, pOverflow); /* Q15+Qm */ - tmp[i] = div_s(tmp1, tmp2); /* Q15+(Q15+Qn)-(Q15+Qm) */ - - shift = 2 + shift1 - shift2; - - if (shift >= 0) - { - *(tmp + i) = shr(*(tmp + i), shift, pOverflow); - /* Q15+Qn-Qm-Qx=Q13 */ - } - else - { - *(tmp + i) = shl(*(tmp + i), negate(shift), pOverflow); - /* Q15+Qn-Qm-Qx=Q13 */ - } - - diff = add(diff, *(tmp + i), pOverflow); /* Q13 */ - } - - /* Compute hangover */ - - if (diff > 5325) /* 0.65 in Q11 */ - { - st->hangVar += 1; - } - else - { - st->hangVar = 0; - } - - - if (st->hangVar > 10) - { - /* Speech period, reset hangover variable */ - st->hangCount = 0; - } - - /* Compute mix constant (bgMix) */ - bgMix = 8192; /* 1 in Q13 */ - - if ((mode <= MR67) || (mode == MR102)) - /* MR475, MR515, MR59, MR67, MR102 */ - { - /* if errors and presumed noise make smoothing probability stronger */ - - if (((((pdfi != 0) && (prev_pdf != 0)) || (bfi != 0) || - (prev_bf != 0)) - && (voicedHangover > 1) - && (inBackgroundNoise != 0) - && ((mode == MR475) || (mode == MR515) || - (mode == MR59)))) - { - /* bgMix = min(0.25, max(0.0, diff-0.55)) / 0.25; */ - tmp_diff = sub(diff, 4506, pOverflow); /* 0.55 in Q13 */ - } - else - { - /* bgMix = min(0.25, max(0.0, diff-0.40)) / 0.25; */ - tmp_diff = sub(diff, 3277, pOverflow); /* 0.4 in Q13 */ - } - - /* max(0.0, diff-0.55) or */ - /* max(0.0, diff-0.40) */ - if (tmp_diff > 0) - { - tmp1 = tmp_diff; - } - else - { - tmp1 = 0; - } - - /* min(0.25, tmp1) */ - if (2048 < tmp1) - { - bgMix = 8192; - } - else - { - bgMix = shl(tmp1, 2, pOverflow); - } - - if ((st->hangCount < 40) || (diff > 5325)) /* 0.65 in Q13 */ - { - /* disable mix if too short time since */ - bgMix = 8192; - } - - /* Smoothen the cb gain trajectory */ - /* smoothing depends on mix constant bgMix */ - L_sum = L_mult(6554, st->cbGainHistory[2], pOverflow); - /* 0.2 in Q15; L_sum in Q17 */ - - for (i = 3; i < L_CBGAINHIST; i++) - { - L_sum = L_mac(L_sum, 6554, st->cbGainHistory[i], pOverflow); - } - cbGainMean = pv_round(L_sum, pOverflow); /* Q1 */ - - /* more smoothing in error and bg noise (NB no DFI used here) */ - - if (((bfi != 0) || (prev_bf != 0)) && (inBackgroundNoise != 0) - && ((mode == MR475) || (mode == MR515) - || (mode == MR59))) - { - /* 0.143 in Q15; L_sum in Q17 */ - L_sum = L_mult(4681, st->cbGainHistory[0], pOverflow); - for (i = 1; i < L_CBGAINHIST; i++) - { - L_sum = - L_mac(L_sum, 4681, st->cbGainHistory[i], pOverflow); - } - cbGainMean = pv_round(L_sum, pOverflow); /* Q1 */ - } - - /* cbGainMix = bgMix*cbGainMix + (1-bgMix)*cbGainMean; */ - /* L_sum in Q15 */ - L_sum = L_mult(bgMix, cbGainMix, pOverflow); - L_sum = L_mac(L_sum, 8192, cbGainMean, pOverflow); - L_sum = L_msu(L_sum, bgMix, cbGainMean, pOverflow); - cbGainMix = pv_round(L_shl(L_sum, 2, pOverflow), pOverflow); /* Q1 */ - } - - st->hangCount += 1; - - return (cbGainMix); -} - |