From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by master.gitmailbox.com (Postfix) with ESMTP id 482264ABEA for ; Thu, 16 May 2024 10:09:45 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 4B5D968D558; Thu, 16 May 2024 13:09:07 +0300 (EEST) Received: from vidala.lynne.ee (vidala.pars.ee [116.203.72.101]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id C34FE68D57C for ; Thu, 16 May 2024 13:09:02 +0300 (EEST) To: ffmpeg-devel@ffmpeg.org Date: Thu, 16 May 2024 12:08:15 +0200 Message-ID: <20240516100818.246162-6-dev@lynne.ee> X-Mailer: git-send-email 2.43.0.381.gb435a96ce8 In-Reply-To: <20240516100818.246162-1-dev@lynne.ee> References: <20240516100818.246162-1-dev@lynne.ee> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 5/8] aactab: add deemphasis tables for USAC X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Lynne via ffmpeg-devel Reply-To: FFmpeg development discussions and patches Cc: Lynne Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Archived-At: List-Archive: List-Post: --- libavcodec/aactab.c | 25 +++++++++++++++++++++++++ libavcodec/aactab.h | 2 ++ 2 files changed, 27 insertions(+) diff --git a/libavcodec/aactab.c b/libavcodec/aactab.c index 3718b81a07..8ce5e43974 100644 --- a/libavcodec/aactab.c +++ b/libavcodec/aactab.c @@ -3377,3 +3377,28 @@ const DECLARE_ALIGNED(32, int, ff_aac_eld_window_480_fixed)[1800] = { 0xffecff1c, 0xffed391e, 0xffed740c, 0xffedafb1, 0xffedebe1, 0xffee287d, 0xffee654e, 0xffeea23f, }; + +/* As specified by ISO/IEC 23003 */ +#define USAC_EMPH_COEFF 0.68 + +DECLARE_ALIGNED(16, const float, ff_aac_deemph_weights)[16] = { + USAC_EMPH_COEFF, + USAC_EMPH_COEFF*USAC_EMPH_COEFF, + USAC_EMPH_COEFF*USAC_EMPH_COEFF*USAC_EMPH_COEFF, + USAC_EMPH_COEFF*USAC_EMPH_COEFF*USAC_EMPH_COEFF*USAC_EMPH_COEFF, + + 0, + USAC_EMPH_COEFF, + USAC_EMPH_COEFF*USAC_EMPH_COEFF, + USAC_EMPH_COEFF*USAC_EMPH_COEFF*USAC_EMPH_COEFF, + + 0, + 0, + USAC_EMPH_COEFF, + USAC_EMPH_COEFF*USAC_EMPH_COEFF, + + 0, + 0, + 0, + USAC_EMPH_COEFF, +}; diff --git a/libavcodec/aactab.h b/libavcodec/aactab.h index e1a2d8b9a1..91262380d4 100644 --- a/libavcodec/aactab.h +++ b/libavcodec/aactab.h @@ -64,6 +64,8 @@ DECLARE_ALIGNED(32, extern const float, ff_aac_eld_window_480)[1800]; DECLARE_ALIGNED(32, extern const int, ff_aac_eld_window_480_fixed)[1800]; // @} +extern const float ff_aac_deemph_weights[16]; + /* Initializes data shared between float decoder and encoder. */ void ff_aac_float_common_init(void); -- 2.43.0.381.gb435a96ce8 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-request@ffmpeg.org with subject "unsubscribe".