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diff --git a/media/libstagefright/codecs/amrnb/dec/src/bgnscd.cpp b/media/libstagefright/codecs/amrnb/dec/src/bgnscd.cpp
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index e732007..0000000
--- a/media/libstagefright/codecs/amrnb/dec/src/bgnscd.cpp
+++ /dev/null
@@ -1,589 +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/bgnscd.c
- Functions:
- Bgn_scd_reset
- Bgn_scd
-
-------------------------------------------------------------------------------
- MODULE DESCRIPTION
-
- Background noise source characteristic detector (SCD)
-
-------------------------------------------------------------------------------
-*/
-
-
-/*----------------------------------------------------------------------------
-; INCLUDES
-----------------------------------------------------------------------------*/
-#include <string.h>
-
-#include "bgnscd.h"
-#include "typedef.h"
-#include "basic_op.h"
-#include "cnst.h"
-#include "copy.h"
-#include "gmed_n.h"
-#include "sqrt_l.h"
-
-/*----------------------------------------------------------------------------
-; MACROS
-; Define module specific macros here
-----------------------------------------------------------------------------*/
-
-
-/*----------------------------------------------------------------------------
-; DEFINES
-; Include all pre-processor statements here. Include conditional
-; compile variables also.
-----------------------------------------------------------------------------*/
-#define TRUE 1
-#define FALSE 0
-
-/*----------------------------------------------------------------------------
-; LOCAL FUNCTION DEFINITIONS
-; Function Prototype declaration
-----------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------------
-; LOCAL VARIABLE DEFINITIONS
-; Variable declaration - defined here and used outside this module
-----------------------------------------------------------------------------*/
-
-
-/*
-------------------------------------------------------------------------------
- FUNCTION NAME: Bgn_scd_reset
-------------------------------------------------------------------------------
- INPUT AND OUTPUT DEFINITIONS
-
- Inputs:
- state = points to memory of type Bgn_scdState.
-
- Outputs:
- The memory of type Bgn_scdState pointed to by state is set to all
- 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
-
- bgnscd.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
-
-------------------------------------------------------------------------------
- PSEUDO-CODE
-
-Word16 Bgn_scd_reset (Bgn_scdState *state)
-{
- if (state == (Bgn_scdState *) NULL){
- fprintf(stderr, "Bgn_scd_reset: invalid parameter\n");
- return -1;
- }
-
- // Static vectors to zero
- Set_zero (state->frameEnergyHist, L_ENERGYHIST);
-
- // Initialize hangover handling
- state->bgHangover = 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 Bgn_scd_reset(Bgn_scdState *state)
-{
- if (state == (Bgn_scdState *) NULL)
- {
- /* fprintf(stderr, "Bgn_scd_reset: invalid parameter\n"); */
- return(-1);
- }
-
- /* Static vectors to zero */
- memset(state->frameEnergyHist, 0, L_ENERGYHIST*sizeof(Word16));
-
- /* Initialize hangover handling */
- state->bgHangover = 0;
-
- return(0);
-}
-
-/****************************************************************************/
-
-/*
-------------------------------------------------------------------------------
- FUNCTION NAME: Bgn_scd
-------------------------------------------------------------------------------
- INPUT AND OUTPUT DEFINITIONS
-
- Inputs:
- st = pointer to state variables of type Bgn_scdState
- ltpGainHist[] = LTP gain history (Word16)
- speech[] = synthesis speech frame (Word16)
- voicedHangover = pointer to # of frames after last voiced frame (Word16)
- pOverflow = pointer to overflow indicator (Flag)
-
- Outputs:
- st = function updates the state variables of type Bgn_scdState
- pointed to by st.
- voicedHangover = function updates the # of frames after last voiced
- frame pointed to by voicedHangover.
- pOverflow = 1 if the basic math function L_add() results in saturation.
- else pOverflow is zero.
-
- Returns:
- inbgNoise = flag if background noise is present (Word16)
-
- Global Variables Used:
- None.
-
- Local Variables Needed:
- None.
-
-------------------------------------------------------------------------------
- FUNCTION DESCRIPTION
-
- Characterize synthesis speech and detect background noise.
-
-------------------------------------------------------------------------------
- REQUIREMENTS
-
- None
-
-------------------------------------------------------------------------------
- REFERENCES
-
- bgnscd.c, UMTS GSM AMR speech codec, R99 - Version 3.2.0, March 2, 2001
-
-------------------------------------------------------------------------------
- PSEUDO-CODE
-
-Word16 Bgn_scd (Bgn_scdState *st, // i : State variables for bgn SCD
- Word16 ltpGainHist[], // i : LTP gain history
- Word16 speech[], // o : synthesis speech frame
- Word16 *voicedHangover // o : # of frames after last
- voiced frame
- )
-{
- Word16 i;
- Word16 prevVoiced, inbgNoise;
- Word16 temp;
- Word16 ltpLimit, frameEnergyMin;
- Word16 currEnergy, noiseFloor, maxEnergy, maxEnergyLastPart;
- Word32 s;
-
- // Update the inBackgroundNoise flag (valid for use in next frame if BFI)
- // it now works as a energy detector floating on top
- // not as good as a VAD.
-
- currEnergy = 0;
- s = (Word32) 0;
-
- for (i = 0; i < L_FRAME; i++)
- {
- s = L_mac (s, speech[i], speech[i]);
- }
-
- s = L_shl(s, 2);
-
- currEnergy = extract_h (s);
-
- frameEnergyMin = 32767;
-
- for (i = 0; i < L_ENERGYHIST; i++)
- {
- if (sub(st->frameEnergyHist[i], frameEnergyMin) < 0)
- frameEnergyMin = st->frameEnergyHist[i];
- }
-
- noiseFloor = shl (frameEnergyMin, 4); // Frame Energy Margin of 16
-
- maxEnergy = st->frameEnergyHist[0];
- for (i = 1; i < L_ENERGYHIST-4; i++)
- {
- if ( sub (maxEnergy, st->frameEnergyHist[i]) < 0)
- {
- maxEnergy = st->frameEnergyHist[i];
- }
- }
-
- maxEnergyLastPart = st->frameEnergyHist[2*L_ENERGYHIST/3];
- for (i = 2*L_ENERGYHIST/3+1; i < L_ENERGYHIST; i++)
- {
- if ( sub (maxEnergyLastPart, st->frameEnergyHist[i] ) < 0)
- {
- maxEnergyLastPart = st->frameEnergyHist[i];
- }
- }
-
- inbgNoise = 0; // false
-
- // Do not consider silence as noise
- // Do not consider continuous high volume as noise
- // Or if the current noise level is very low
- // Mark as noise if under current noise limit
- // OR if the maximum energy is below the upper limit
-
- if ( (sub(maxEnergy, LOWERNOISELIMIT) > 0) &&
- (sub(currEnergy, FRAMEENERGYLIMIT) < 0) &&
- (sub(currEnergy, LOWERNOISELIMIT) > 0) &&
- ( (sub(currEnergy, noiseFloor) < 0) ||
- (sub(maxEnergyLastPart, UPPERNOISELIMIT) < 0)))
- {
- if (sub(add(st->bgHangover, 1), 30) > 0)
- {
- st->bgHangover = 30;
- } else
- {
- st->bgHangover = add(st->bgHangover, 1);
- }
- }
- else
- {
- st->bgHangover = 0;
- }
-
- // make final decision about frame state , act somewhat cautiosly
- if (sub(st->bgHangover,1) > 0)
- inbgNoise = 1; // true
-
- for (i = 0; i < L_ENERGYHIST-1; i++)
- {
- st->frameEnergyHist[i] = st->frameEnergyHist[i+1];
- }
- st->frameEnergyHist[L_ENERGYHIST-1] = currEnergy;
-
- // prepare for voicing decision; tighten the threshold after some
- time in noise
- ltpLimit = 13926; // 0.85 Q14
- if (sub(st->bgHangover, 8) > 0)
- {
- ltpLimit = 15565; // 0.95 Q14
- }
- if (sub(st->bgHangover, 15) > 0)
- {
- ltpLimit = 16383; // 1.00 Q14
- }
-
- // weak sort of voicing indication.
- prevVoiced = 0; // false
-
- if (sub(gmed_n(&ltpGainHist[4], 5), ltpLimit) > 0)
- {
- prevVoiced = 1; // true
- }
- if (sub(st->bgHangover, 20) > 0) {
- if (sub(gmed_n(ltpGainHist, 9), ltpLimit) > 0)
- {
- prevVoiced = 1; // true
- }
- else
- {
- prevVoiced = 0; // false
- }
- }
-
- if (prevVoiced)
- {
- *voicedHangover = 0;
- }
- else
- {
- temp = add(*voicedHangover, 1);
- if (sub(temp, 10) > 0)
- {
- *voicedHangover = 10;
- }
- else
- {
- *voicedHangover = temp;
- }
- }
-
- return inbgNoise;
-}
-
-------------------------------------------------------------------------------
- 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 Bgn_scd(Bgn_scdState *st, /* i : State variables for bgn SCD */
- Word16 ltpGainHist[], /* i : LTP gain history */
- Word16 speech[], /* o : synthesis speech frame */
- Word16 *voicedHangover,/* o : # of frames after last
- voiced frame */
- Flag *pOverflow
- )
-{
- Word16 i;
- Word16 prevVoiced, inbgNoise;
- Word16 temp;
- Word16 ltpLimit, frameEnergyMin;
- Word16 currEnergy, noiseFloor, maxEnergy, maxEnergyLastPart;
- Word32 s, L_temp;
-
-
- /* Update the inBackgroundNoise flag (valid for use in next frame if BFI) */
- /* it now works as a energy detector floating on top */
- /* not as good as a VAD. */
-
- s = (Word32) 0;
-
- for (i = L_FRAME - 1; i >= 0; i--)
- {
- L_temp = ((Word32) speech[i]) * speech[i];
- if (L_temp != (Word32) 0x40000000L)
- {
- L_temp = L_temp << 1;
- }
- else
- {
- L_temp = MAX_32;
- }
- s = L_add(s, L_temp, pOverflow);
- }
-
- /* s is a sum of squares, so don't need to check for neg overflow */
- if (s > (Word32)0x1fffffffL)
- {
- currEnergy = MAX_16;
- }
- else
- {
- currEnergy = (Word16)(s >> 14);
- }
-
- frameEnergyMin = 32767;
- for (i = L_ENERGYHIST - 1; i >= 0; i--)
- {
- if (st->frameEnergyHist[i] < frameEnergyMin)
- {
- frameEnergyMin = st->frameEnergyHist[i];
- }
- }
-
- /* Frame Energy Margin of 16 */
- L_temp = (Word32)frameEnergyMin << 4;
- if (L_temp != (Word32)((Word16) L_temp))
- {
- if (L_temp > 0)
- {
- noiseFloor = MAX_16;
- }
- else
- {
- noiseFloor = MIN_16;
- }
- }
- else
- {
- noiseFloor = (Word16)(L_temp);
- }
-
- maxEnergy = st->frameEnergyHist[0];
- for (i = L_ENERGYHIST - 5; i >= 1; i--)
- {
- if (maxEnergy < st->frameEnergyHist[i])
- {
- maxEnergy = st->frameEnergyHist[i];
- }
- }
-
- maxEnergyLastPart = st->frameEnergyHist[2*L_ENERGYHIST/3];
- for (i = 2 * L_ENERGYHIST / 3 + 1; i < L_ENERGYHIST; i++)
- {
- if (maxEnergyLastPart < st->frameEnergyHist[i])
- {
- maxEnergyLastPart = st->frameEnergyHist[i];
- }
- }
-
- /* Do not consider silence as noise */
- /* Do not consider continuous high volume as noise */
- /* Or if the current noise level is very low */
- /* Mark as noise if under current noise limit */
- /* OR if the maximum energy is below the upper limit */
-
- if ((maxEnergy > LOWERNOISELIMIT) &&
- (currEnergy < FRAMEENERGYLIMIT) &&
- (currEnergy > LOWERNOISELIMIT) &&
- ((currEnergy < noiseFloor) ||
- (maxEnergyLastPart < UPPERNOISELIMIT)))
- {
- if ((st->bgHangover + 1) > 30)
- {
- st->bgHangover = 30;
- }
- else
- {
- st->bgHangover += 1;
- }
- }
- else
- {
- st->bgHangover = 0;
- }
-
- /* make final decision about frame state , act somewhat cautiosly */
-
- if (st->bgHangover > 1)
- {
- inbgNoise = TRUE;
- }
- else
- {
- inbgNoise = FALSE;
- }
-
- for (i = 0; i < L_ENERGYHIST - 1; i++)
- {
- st->frameEnergyHist[i] = st->frameEnergyHist[i+1];
- }
- st->frameEnergyHist[L_ENERGYHIST-1] = currEnergy;
-
- /* prepare for voicing decision; tighten the threshold after some
- time in noise */
-
- if (st->bgHangover > 15)
- {
- ltpLimit = 16383; /* 1.00 Q14 */
- }
- else if (st->bgHangover > 8)
- {
- ltpLimit = 15565; /* 0.95 Q14 */
- }
- else
- {
- ltpLimit = 13926; /* 0.85 Q14 */
- }
-
- /* weak sort of voicing indication. */
- prevVoiced = FALSE;
-
- if (gmed_n(&ltpGainHist[4], 5) > ltpLimit)
- {
- prevVoiced = TRUE;
- }
-
- if (st->bgHangover > 20)
- {
- if (gmed_n(ltpGainHist, 9) > ltpLimit)
- {
- prevVoiced = TRUE;
- }
- else
- {
- prevVoiced = FALSE;
- }
- }
-
-
- if (prevVoiced)
- {
- *voicedHangover = 0;
- }
- else
- {
- temp = *voicedHangover + 1;
-
- if (temp > 10)
- {
- *voicedHangover = 10;
- }
- else
- {
- *voicedHangover = temp;
- }
- }
-
- return(inbgNoise);
-}
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