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 D537148AA8 for ; Thu, 28 Mar 2024 21:36:23 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 02D9568D701; Thu, 28 Mar 2024 23:36:14 +0200 (EET) Received: from mail-yb1-f202.google.com (mail-yb1-f202.google.com [209.85.219.202]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 7D84868D42C for ; Thu, 28 Mar 2024 23:36:06 +0200 (EET) Received: by mail-yb1-f202.google.com with SMTP id 3f1490d57ef6-dcdc3db67f0so2889712276.1 for ; Thu, 28 Mar 2024 14:36:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711661765; x=1712266565; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=axUWRQAXvCiT54MQKMzzCqXji6EJcc5fv2YKpS/9tas=; b=ZUnhaLdavDbNuqBGfTMsZh8EOSlw7lcTAInkq/u01SaN8JjX5488vvn+Afnacg9fbe /8qrWvS1ShmccXmkdz+vTmJAHLq5ImOdhPTojoJk+cK9LeYas59ngAAWmjbOcILHc/hv KfLbRC6nIj9dZXdUhR+m01kuUxHFDUodZIj9bP6rcc3hY89OcokmGoOBblOM3bkij0p6 IKqa1Q7536pxb9ppc6/cw40e7vVmLQavNpxWTH4b8JIltINsG280IyBWkpGq3iK1BVoc DcJEG8jrBQswMeQ0xfHhKY7206csLsgmb8f6tdNBWDAkqWaP23WQYhMcP/LGER49E0GP mBNQ== X-Gm-Message-State: AOJu0YzLbBGaAKMazXAgABiaL6gLx6r7Rvu6DngKXoUbUE59O4WDkEuj bEuh45ExLV1ZRCDAZmvHv/VAMlkMPYkSFJDPsm4/t55IFeR1c7Esgv0GcPvUu9GWGHEmR0XDki/ 5PVKoK8D94GU88wc1U3N8Esol9ESDpOaY2lUJ05oZapJwcIeweDjN8lQaxbRSNCnURdcacv1deQ 2JFeXoXn52PSiKPD1jsGasJgyYCzlXAjQ1PQylAygeXQpM X-Google-Smtp-Source: AGHT+IFjIbTnVvsjw4y5whBk2or/HmP0tN8dbBLk97uieo26cUmwQERsgMCuW463Pd9VUUwXF1Y5CzddUDxcFQ== X-Received: from asoulier-us.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:f79]) (user=asoulier job=sendgmr) by 2002:a25:abea:0:b0:dcc:2267:796e with SMTP id v97-20020a25abea000000b00dcc2267796emr738923ybi.2.1711661764763; Thu, 28 Mar 2024 14:36:04 -0700 (PDT) Date: Thu, 28 Mar 2024 21:35:59 +0000 In-Reply-To: <20240328213600.864070-1-asoulier@google.com> Mime-Version: 1.0 References: <20240328213600.864070-1-asoulier@google.com> X-Mailer: git-send-email 2.44.0.478.gd926399ef9-goog Message-ID: <20240328213600.864070-2-asoulier@google.com> To: ffmpeg-devel@ffmpeg.org Subject: [FFmpeg-devel] [PATCH 2/2] avformat/lc3: Add file format for LC3/LC3plus transport 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: Antoine Soulier via ffmpeg-devel Reply-To: FFmpeg development discussions and patches Cc: Antoine Soulier 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: A file format is described in Bluetooth SIG LC3 and ETSI TS 103 634, for test purpose. This is the format implemented here. Signed-off-by: Antoine Soulier --- Changelog | 1 + doc/muxers.texi | 6 ++ libavformat/Makefile | 2 + libavformat/allformats.c | 2 + libavformat/lc3dec.c | 135 +++++++++++++++++++++++++++++++++++++++ libavformat/lc3enc.c | 102 +++++++++++++++++++++++++++++ 6 files changed, 248 insertions(+) create mode 100644 libavformat/lc3dec.c create mode 100644 libavformat/lc3enc.c diff --git a/Changelog b/Changelog index 83a4cf7888..08c200a41d 100644 --- a/Changelog +++ b/Changelog @@ -2,6 +2,7 @@ Entries are sorted chronologically from oldest to youngest within each release, releases are sorted from youngest to oldest. version : +- LC3/LC3plus demuxer and muxer - LC3/LC3plus decoding/encoding using external library liblc3 diff --git a/doc/muxers.texi b/doc/muxers.texi index a10a8e216f..9687746c30 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -2612,6 +2612,12 @@ WebDAV server every second: ffmpeg -f x11grab -framerate 1 -i :0.0 -q:v 6 -update 1 -protocol_opts method=PUT http://example.com/desktop.jpg @end example +@section lc3 +Bluetooth SIG Low Complexity Communication Codec audio (LC3), or +ETSI TS 103 634 Low Complexity Communication Codec plus (LC3plus). + +This muxer accepts a single @code{lc3} audio stream. + @section matroska Matroska container muxer. diff --git a/libavformat/Makefile b/libavformat/Makefile index 44aa485029..4961c42852 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -332,6 +332,8 @@ OBJS-$(CONFIG_KVAG_DEMUXER) += kvag.o OBJS-$(CONFIG_KVAG_MUXER) += kvag.o rawenc.o OBJS-$(CONFIG_LAF_DEMUXER) += lafdec.o OBJS-$(CONFIG_LATM_MUXER) += latmenc.o rawenc.o +OBJS-$(CONFIG_LC3_DEMUXER) += lc3dec.o +OBJS-$(CONFIG_LC3_MUXER) += lc3enc.o OBJS-$(CONFIG_LMLM4_DEMUXER) += lmlm4.o OBJS-$(CONFIG_LOAS_DEMUXER) += loasdec.o rawdec.o OBJS-$(CONFIG_LUODAT_DEMUXER) += luodatdec.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 9df42bb87a..0b36a7c3eb 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -252,6 +252,8 @@ extern const FFInputFormat ff_kvag_demuxer; extern const FFOutputFormat ff_kvag_muxer; extern const FFInputFormat ff_laf_demuxer; extern const FFOutputFormat ff_latm_muxer; +extern const FFInputFormat ff_lc3_demuxer; +extern const FFOutputFormat ff_lc3_muxer; extern const FFInputFormat ff_lmlm4_demuxer; extern const FFInputFormat ff_loas_demuxer; extern const FFInputFormat ff_luodat_demuxer; diff --git a/libavformat/lc3dec.c b/libavformat/lc3dec.c new file mode 100644 index 0000000000..9ca9825f1b --- /dev/null +++ b/libavformat/lc3dec.c @@ -0,0 +1,135 @@ +/* + * LC3 demuxer + * Copyright (C) 2024 Antoine Soulier + * + * 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 + */ + +/** + * @file + * Based on the file format specified by : + * + * - Bluetooth SIG - Low Complexity Communication Codec Test Suite + * https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=502301 + * 3.2.8.2 Reference LC3 Codec Bitstream Format + * + * - ETSI TI 103 634 V1.4.1 - Low Complexity Communication Codec plus + * https://www.etsi.org/deliver/etsi_ts/103600_103699/103634/01.04.01_60/ts_103634v010401p.pdf + * LC3plus conformance script package + */ + +#include "libavcodec/packet.h" +#include "libavutil/intreadwrite.h" + +#include "avformat.h" +#include "avio.h" +#include "demux.h" +#include "internal.h" + +typedef struct LC3DemuxContext { + int frame_samples; + int64_t position; + int64_t length; +} LC3DemuxContext; + +static int lc3_read_header(AVFormatContext *s) +{ + LC3DemuxContext *lc3 = s->priv_data; + AVStream *st = NULL; + uint16_t tag, hdr_size; + uint16_t frame_us; + uint32_t length; + int ep_mode, hr_mode; + int srate_hz, channels, bit_rate; + int num_extra_params, ret; + + tag = avio_rb16(s->pb); + hdr_size = avio_rl16(s->pb); + + if (tag != 0x1ccc || hdr_size < 9 * sizeof(uint16_t)) + return AVERROR_INVALIDDATA; + + num_extra_params = hdr_size / sizeof(uint16_t) - 9; + + srate_hz = avio_rl16(s->pb) * 100; + bit_rate = avio_rl16(s->pb) * 100; + channels = avio_rl16(s->pb); + frame_us = avio_rl16(s->pb) * 10; + ep_mode = avio_rl16(s->pb) != 0; + length = avio_rl32(s->pb); + hr_mode = num_extra_params >= 1 && avio_rl16(s->pb); + + st = avformat_new_stream(s, NULL); + if (!st) + return AVERROR(ENOMEM); + + avpriv_set_pts_info(st, 32, 1, srate_hz); + st->duration = length; + + st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; + st->codecpar->codec_id = AV_CODEC_ID_LC3; + st->codecpar->sample_rate = srate_hz; + st->codecpar->bit_rate = bit_rate; + st->codecpar->ch_layout.nb_channels = channels; + + if ((ret = ff_alloc_extradata(st->codecpar, 6)) < 0) { + av_log(s, AV_LOG_ERROR, "Could not allocate extradata\n"); + return ret; + } + + AV_WL16(st->codecpar->extradata + 0, frame_us); + AV_WL16(st->codecpar->extradata + 2, ep_mode); + AV_WL16(st->codecpar->extradata + 4, hr_mode); + + lc3->frame_samples = av_rescale(frame_us, srate_hz, 1000*1000); + + lc3->position = 0; + lc3->length = st->duration + + av_rescale(frame_us == 7500 ? 4000 : 2500, srate_hz, 1000*1000); + + return 0; +} + +static int lc3_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + LC3DemuxContext *lc3 = s->priv_data; + AVIOContext *pb = s->pb; + int ret; + + ret = av_get_packet(s->pb, pkt, avio_rl16(pb)); + if (ret < 0) + return ret; + + pkt->duration = lc3->frame_samples; + lc3->position += lc3->frame_samples; + if (lc3->position > lc3->length) { + pkt->duration -= lc3->position - lc3->length; + lc3->position = lc3->length; + } + + return 0; +} + +const FFInputFormat ff_lc3_demuxer = { + .p.name = "lc3", + .p.long_name = NULL_IF_CONFIG_SMALL("LC3 (Low Complexity Communication Codec)"), + .p.extensions = "lc3", + .p.flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH | AVFMT_NO_BYTE_SEEK | AVFMT_NOTIMESTAMPS, + .priv_data_size = sizeof(LC3DemuxContext), + .read_header = lc3_read_header, + .read_packet = lc3_read_packet, +}; diff --git a/libavformat/lc3enc.c b/libavformat/lc3enc.c new file mode 100644 index 0000000000..a7e3e3f4f7 --- /dev/null +++ b/libavformat/lc3enc.c @@ -0,0 +1,102 @@ +/* + * LC3 muxer + * Copyright (C) 2024 Antoine Soulier + * + * 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 + */ + +/** + * @file + * Based on the file format specified by : + * + * - Bluetooth SIG - Low Complexity Communication Codec Test Suite + * https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=502301 + * 3.2.8.2 Reference LC3 Codec Bitstream Format + * + * - ETSI TI 103 634 V1.4.1 - Low Complexity Communication Codec plus + * https://www.etsi.org/deliver/etsi_ts/103600_103699/103634/01.04.01_60/ts_103634v010401p.pdf + * LC3plus conformance script package + */ + +#include "libavutil/intreadwrite.h" + +#include "avformat.h" +#include "avio.h" +#include "mux.h" +#include "internal.h" + +static av_cold int lc3_init(AVFormatContext *s) +{ + if (s->nb_streams != 1) { + av_log(s, AV_LOG_ERROR, "This muxer only supports a single stream.\n"); + return AVERROR(EINVAL); + } + + return 0; +} + +static int lc3_write_header(AVFormatContext *s) +{ + AVStream *st = s->streams[0]; + int channels = st->codecpar->ch_layout.nb_channels; + int srate_hz = st->codecpar->sample_rate; + int bit_rate = st->codecpar->bit_rate; + uint16_t frame_us = 10000; + int ep_mode = 0, hr_mode = 0; + uint32_t nb_samples = av_rescale_q( + st->duration, st->time_base, (AVRational){ 1, srate_hz }); + + if (st->codecpar->extradata_size >= 2) + frame_us = AV_RL16(st->codecpar->extradata + 0); + + if (st->codecpar->extradata_size >= 6) { + ep_mode = AV_RL16(st->codecpar->extradata + 2); + hr_mode = AV_RL16(st->codecpar->extradata + 4); + } + + avio_wb16(s->pb, 0x1ccc); + avio_wl16(s->pb, (9 + hr_mode) * sizeof(uint16_t)); + avio_wl16(s->pb, srate_hz / 100); + avio_wl16(s->pb, bit_rate / 100); + avio_wl16(s->pb, channels); + avio_wl16(s->pb, frame_us / 10); + avio_wl16(s->pb, ep_mode); + avio_wl32(s->pb, nb_samples); + if (hr_mode) + avio_wl16(s->pb, hr_mode); + + return 0; +} + +static int lc3_write_packet(AVFormatContext *s, AVPacket *pkt) +{ + avio_wl16(s->pb, pkt->size); + avio_write(s->pb, pkt->data, pkt->size); + return 0; +} + +const FFOutputFormat ff_lc3_muxer = { + .p.name = "lc3", + .p.long_name = NULL_IF_CONFIG_SMALL("LC3 (Low Complexity Communication Codec)"), + .p.extensions = "lc3", + .p.audio_codec = AV_CODEC_ID_LC3, + .p.video_codec = AV_CODEC_ID_NONE, + .p.flags = AVFMT_NOTIMESTAMPS, + .init = lc3_init, + .write_header = lc3_write_header, + .write_packet = lc3_write_packet, +}; -- 2.44.0.478.gd926399ef9-goog _______________________________________________ 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".