From patchwork Sun May 3 20:21:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lynne X-Patchwork-Id: 19454 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id 9230C44A578 for ; Sun, 3 May 2020 23:21:40 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 6F9DA68BEA2; Sun, 3 May 2020 23:21:40 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from w4.tutanota.de (w4.tutanota.de [81.3.6.165]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 268DC68BD2C for ; Sun, 3 May 2020 23:21:34 +0300 (EEST) Received: from w3.tutanota.de (unknown [192.168.1.164]) by w4.tutanota.de (Postfix) with ESMTP id B340C106019B for ; Sun, 3 May 2020 20:21:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1588537293; s=s1; d=lynne.ee; h=From:From:To:To:Subject:Subject:Content-Description:Content-ID:Content-Type:Content-Type:Content-Transfer-Encoding:Cc:Date:Date:In-Reply-To:MIME-Version:MIME-Version:Message-ID:Message-ID:Reply-To:References:Sender; bh=4eGKtLV2JsSTO/epmSCZZvEs+zp3hxmk1VAumgMlbIk=; b=EnZQRH7XEJNnx8rX3edDI+ciZS3AYQQZVQmXuL1sTSewsIxQimOl9GWfFZCj+Ord DQ7XUzShVjXLpSEvaor2sp9x4vmFmHs+aUjWuAdzzLQErrrUrIQY7HUnakSnHy0n54X 5fvUqYbMtSk00abMIYAtZY6Z+lNQrKbtzamONeb1hO0YwKLzIh/bUh4lYRs8zfBxa0y u/J2GIoxyL12wCmjmOduPOe7e+yElJShp13NIe2sRMF2n+0PBnQ0v0fixZmrPuzZWA7 NopgeMzvxbhQPI/TdWrEZIVV5a+/isFeICt5tRQlE9zrJRM3+sZzfoWKk63oXATlRIG lEAbEychMA== Date: Sun, 3 May 2020 22:21:33 +0200 (CEST) From: Lynne To: Ffmpeg Devel Message-ID: MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] lavc/bsf: add an Opus metadata bitstream filter X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" The only adjustable field is the gain. Some ripping/transcoding programs have started to use it for replaygain adjustments. Patch attached. From 44f83786e057d468efee986ee865ba8c776ebe9b Mon Sep 17 00:00:00 2001 From: Lynne Date: Sun, 3 May 2020 21:17:33 +0100 Subject: [PATCH] lavc/bsf: add an Opus metadata bitstream filter The only adjustable field is the gain. Some ripping/transcoding programs have started to use it. --- libavcodec/Makefile | 1 + libavcodec/bitstream_filters.c | 1 + libavcodec/opus_metadata_bsf.c | 72 ++++++++++++++++++++++++++++++++++ 3 files changed, 74 insertions(+) create mode 100644 libavcodec/opus_metadata_bsf.c diff --git a/libavcodec/Makefile b/libavcodec/Makefile index 28076c2c83..cf72f55aff 100644 --- a/libavcodec/Makefile +++ b/libavcodec/Makefile @@ -1116,6 +1116,7 @@ OBJS-$(CONFIG_MP3_HEADER_DECOMPRESS_BSF) += mp3_header_decompress_bsf.o \ OBJS-$(CONFIG_MPEG2_METADATA_BSF) += mpeg2_metadata_bsf.o OBJS-$(CONFIG_NOISE_BSF) += noise_bsf.o OBJS-$(CONFIG_NULL_BSF) += null_bsf.o +OBJS-$(CONFIG_OPUS_METADATA_BSF) += opus_metadata_bsf.o OBJS-$(CONFIG_PRORES_METADATA_BSF) += prores_metadata_bsf.o OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF) += remove_extradata_bsf.o OBJS-$(CONFIG_TEXT2MOVSUB_BSF) += movsub_bsf.o diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c index 6b5ffe4d70..f1b24baa53 100644 --- a/libavcodec/bitstream_filters.c +++ b/libavcodec/bitstream_filters.c @@ -49,6 +49,7 @@ extern const AVBitStreamFilter ff_mpeg4_unpack_bframes_bsf; extern const AVBitStreamFilter ff_mov2textsub_bsf; extern const AVBitStreamFilter ff_noise_bsf; extern const AVBitStreamFilter ff_null_bsf; +extern const AVBitStreamFilter ff_opus_metadata_bsf; extern const AVBitStreamFilter ff_prores_metadata_bsf; extern const AVBitStreamFilter ff_remove_extradata_bsf; extern const AVBitStreamFilter ff_text2movsub_bsf; diff --git a/libavcodec/opus_metadata_bsf.c b/libavcodec/opus_metadata_bsf.c new file mode 100644 index 0000000000..f0d794c1b3 --- /dev/null +++ b/libavcodec/opus_metadata_bsf.c @@ -0,0 +1,72 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "bsf.h" +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" + +typedef struct OpusBSFContext { + const AVClass *class; + int64_t gain; +} OpusBSFContext; + +static int opus_metadata_filter(AVBSFContext *bsfc, AVPacket *pkt) +{ + return ff_bsf_get_packet_ref(bsfc, pkt); +} + +static int opus_metadata_init(AVBSFContext *bsfc) +{ + OpusBSFContext *s = bsfc->priv_data; + + if (bsfc->par_out->extradata_size < 19) + return AVERROR_INVALIDDATA; + + AV_WL16(bsfc->par_out->extradata + 16, s->gain); + + return 0; +} + +#define OFFSET(x) offsetof(OpusBSFContext, x) +#define FLAGS (AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_BSF_PARAM) +static const AVOption opus_metadata_options[] = { + { "gain", "Gain, actual amplification is pow(10, gain/(20.0*256))", OFFSET(gain), + AV_OPT_TYPE_INT, { .i64 = 0 }, -(INT16_MAX + 1), INT16_MAX, .flags = FLAGS }, + + { NULL }, +}; + +static const AVClass opus_metadata_class = { + .class_name = "opus_metadata_bsf", + .item_name = av_default_item_name, + .option = opus_metadata_options, + .version = LIBAVUTIL_VERSION_INT, +}; + +static const enum AVCodecID codec_ids[] = { + AV_CODEC_ID_OPUS, AV_CODEC_ID_NONE, +}; + +const AVBitStreamFilter ff_opus_metadata_bsf = { + .name = "opus_metadata", + .priv_data_size = sizeof(OpusBSFContext), + .priv_class = &opus_metadata_class, + .init = &opus_metadata_init, + .filter = &opus_metadata_filter, + .codec_ids = codec_ids, +}; -- 2.26.2