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Overcome SBR encoder coupling quality issue in ELD. 

Bug 177604812
Test: see SBR/PS encoder

Change-Id: Ie7b9f8d1dec3708557d1e1189d45bc0e3bf5444c
This commit is contained in:
Fraunhofer IIS FDK 2020-04-17 15:11:03 +02:00 committed by Jean-Michel Trivi
parent 91ec65f7c8
commit 4204c46665
2 changed files with 17 additions and 10 deletions
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22
libSBRenc/src/env_est.cpp
View File

@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
© Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved.
1. INTRODUCTION
@ -1267,6 +1267,7 @@ void FDKsbrEnc_extractSbrEnvelope2(
sbrExtrEnv->pre_transient_info[1] = ed->transient_info[1]; /* tran_flag */
hEnvChan->encEnvData.noOfEnvelopes = ed->nEnvelopes =
ed->frame_info->nEnvelopes; /* number of envelopes of current frame */
hEnvChan->encEnvData.currentAmpResFF = (AMP_RES)h_con->initAmpResFF;
/*
Check if the current frame is divided into one envelope only. If so, set
@ -1274,8 +1275,9 @@ void FDKsbrEnc_extractSbrEnvelope2(
*/
if ((hEnvChan->encEnvData.hSbrBSGrid->frameClass == FIXFIX) &&
(ed->nEnvelopes == 1)) {
AMP_RES currentAmpResFF = SBR_AMP_RES_1_5;
if (h_con->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) {
/* Note: global_tonaliy_float_value ==
/* Note: global_tonality_float_value ==
((float)hEnvChan->encEnvData.global_tonality/((INT64)(1)<<(31-(19+2)))/0.524288*(2.0/3.0)));
threshold_float_value ==
((float)h_con->thresholdAmpResFF_m/((INT64)(1)<<(31-(h_con->thresholdAmpResFF_e)))/0.524288*(2.0/3.0)));
@ -1289,14 +1291,13 @@ void FDKsbrEnc_extractSbrEnvelope2(
} else {
hEnvChan->encEnvData.currentAmpResFF = SBR_AMP_RES_3_0;
}
} else
hEnvChan->encEnvData.currentAmpResFF = SBR_AMP_RES_1_5;
currentAmpResFF = hEnvChan->encEnvData.currentAmpResFF;
}
if (hEnvChan->encEnvData.currentAmpResFF !=
hEnvChan->encEnvData.init_sbr_amp_res) {
if (currentAmpResFF != hEnvChan->encEnvData.init_sbr_amp_res) {
FDKsbrEnc_InitSbrHuffmanTables(
&hEnvChan->encEnvData, &hEnvChan->sbrCodeEnvelope,
&hEnvChan->sbrCodeNoiseFloor, hEnvChan->encEnvData.currentAmpResFF);
&hEnvChan->sbrCodeNoiseFloor, currentAmpResFF);
}
} else {
if (sbrHeaderData->sbr_amp_res != hEnvChan->encEnvData.init_sbr_amp_res) {
@ -1355,6 +1356,13 @@ void FDKsbrEnc_extractSbrEnvelope2(
}
}
if (h_con->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY &&
stereoMode == SBR_SWITCH_LRC &&
h_envChan[0]->encEnvData.currentAmpResFF !=
h_envChan[1]->encEnvData.currentAmpResFF) {
stereoMode = SBR_LEFT_RIGHT;
}
/*
Extract envelope of current frame.
*/

5
libSBRenc/src/sbr_encoder.cpp
View File

@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android
© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
© Copyright 1995 - 2020 Fraunhofer-Gesellschaft zur Förderung der angewandten
Forschung e.V. All rights reserved.
1. INTRODUCTION
@ -1450,8 +1450,6 @@ static INT initEnvChannel(HANDLE_SBR_CONFIG_DATA sbrConfigData,
params->deltaTAcrossFrames, 0, 0))
return (1);
sbrConfigData->initAmpResFF = params->init_amp_res_FF;
if (FDKsbrEnc_InitSbrHuffmanTables(&hEnv->encEnvData, &hEnv->sbrCodeEnvelope,
&hEnv->sbrCodeNoiseFloor,
sbrHeaderData->sbr_amp_res))
@ -1749,6 +1747,7 @@ static INT FDKsbrEnc_EnvInit(HANDLE_SBR_ELEMENT hSbrElement,
hSbrElement->sbrHeaderData.sbr_data_extra = 1;
hSbrElement->sbrHeaderData.sbr_amp_res = (AMP_RES)params->amp_res;
hSbrElement->sbrConfigData.initAmpResFF = params->init_amp_res_FF;
/* header_extra_1 */
hSbrElement->sbrHeaderData.freqScale = params->freqScale;