5914ab837d
- Add 2 upstream bug fixes for Silk:
* opus-Silk-CNG-adapts-faster.patch: Silk CNG adapts faster to
received packets with lower gains.
* opus-Silk-fix-arm-optimization.patch: Avoid processing LPC
coeffs beyond the given order in NEON optimizations.
OBS-URL: https://build.opensuse.org/request/show/723806
OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/opus?expand=0&rev=41
41 lines
1.6 KiB
Diff
41 lines
1.6 KiB
Diff
From 3ebf4ad86de2469572f7fa2bd6451469e7867c8f Mon Sep 17 00:00:00 2001
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From: Felicia Lim <flim@google.com>
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Date: Fri, 31 May 2019 13:58:44 -0700
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Subject: [PATCH] Silk CNG adapts faster to received packets with lower gains
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---
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silk/CNG.c | 4 ++++
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silk/define.h | 1 +
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2 files changed, 5 insertions(+)
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diff --git a/silk/CNG.c b/silk/CNG.c
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index ef8e38df..2a910099 100644
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--- a/silk/CNG.c
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+++ b/silk/CNG.c
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@@ -118,6 +118,10 @@ void silk_CNG(
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/* Smooth gains */
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for( i = 0; i < psDec->nb_subfr; i++ ) {
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psCNG->CNG_smth_Gain_Q16 += silk_SMULWB( psDecCtrl->Gains_Q16[ i ] - psCNG->CNG_smth_Gain_Q16, CNG_GAIN_SMTH_Q16 );
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+ /* If the smoothed gain is 3 dB greater than this subframe's gain, use this subframe's gain to adapt faster. */
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+ if( silk_SMULWW( psCNG->CNG_smth_Gain_Q16, CNG_GAIN_SMTH_THRESHOLD_Q16 ) > psDecCtrl->Gains_Q16[ i ] ) {
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+ psCNG->CNG_smth_Gain_Q16 = psDecCtrl->Gains_Q16[ i ];
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+ }
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}
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}
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diff --git a/silk/define.h b/silk/define.h
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index 247cb0bf..491c86f3 100644
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--- a/silk/define.h
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+++ b/silk/define.h
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@@ -225,6 +225,7 @@ extern "C"
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/* Defines for CN generation */
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#define CNG_BUF_MASK_MAX 255 /* 2^floor(log2(MAX_FRAME_LENGTH))-1 */
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#define CNG_GAIN_SMTH_Q16 4634 /* 0.25^(1/4) */
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+#define CNG_GAIN_SMTH_THRESHOLD_Q16 46396 /* -3 dB */
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#define CNG_NLSF_SMTH_Q16 16348 /* 0.25 */
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#ifdef __cplusplus
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--
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2.11.0
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