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 2AEC340A3C for ; Sat, 4 Jun 2022 10:35:43 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 8330E68B619; Sat, 4 Jun 2022 13:35:40 +0300 (EEST) Received: from mail-ej1-f44.google.com (mail-ej1-f44.google.com [209.85.218.44]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id C8DCF68B536 for ; Sat, 4 Jun 2022 13:35:34 +0300 (EEST) Received: by mail-ej1-f44.google.com with SMTP id me5so19745133ejb.2 for ; Sat, 04 Jun 2022 03:35:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=iTflgv8UDa0NJ6lqhTV8hZLbLufZWVCeqm0Gkq4sg+A=; b=qukptu/QWA0fQjcJGPaewcnHKPnL6qZUP9t1tRHG/rcihxLWNZVuBSXuDiOCJG9A8t hgo6Xb8nlB9JDGtREhaA/3P0ngJmAk9q/aptBNEot0fnWxuATq4B0O8BE2H02P4zMT7Z UXjnm1WYSw3tdXl0QxamA6Jm/7PQjzoVwk6F70PKr0/bt8aBHR2iUY7d7r4zHHNgqvxq kAUcaqTFK/5XMQdCyElEerq8zj+NF5KZeqUnv6jaeJdfBJQve/LFZgm1yJ+bS6TrdC3m kVUOdAHU7IqdBO8axn30X+HiVRntZ3Yf+VV9aAiv1JxAsSTJUBPcs6cd7yfUAcqj46ot mCHQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=iTflgv8UDa0NJ6lqhTV8hZLbLufZWVCeqm0Gkq4sg+A=; b=stCcLF+ZUIQIXZ73s9HXZ5Inc35TfbHHeM8PTGl5dTgQC/7lf1vksbljjvM9ktYTkw szTOXcosM0P/iwGT8b22SSWQ9aov7h2e95NNbn0EHWGdduG5vLYJpteZCJ+lisGEm4sa SlSbFqF7mceS+VYnAZVo8wU0f6+dIGxVSPNJCgpdx1PnDkiJdElABKocFtiA+fkSVKIQ pjPLxVw8vg2rAsYAy47Qn8Vs8w/oyGGk9TOoju893wrBPonnRSWLQZKriZ/zLVnTe0pP BUAYCR5qR9PwOKKKMi2c2PyR318hEnvaxPOyLDWffu62r1kP2251IT1+wd6lVbFF1Hmp wMVA== X-Gm-Message-State: AOAM532QJK8JSv2wA5vaKvzqZiQ9P4igJ2FiRjzQf3r1kyfITinZ18c1 bxYCXqoPgw45/LBz/oPBzWR6IcuVzN6fdA== X-Google-Smtp-Source: ABdhPJybBSc74jiTXErH7aCqrt6fC0TWmNjepwG+sXm4OvRNklO9IDji4BK6hQqL0QnKC8DZkPgJFQ== X-Received: by 2002:a17:907:7d88:b0:6fe:d709:6735 with SMTP id oz8-20020a1709077d8800b006fed7096735mr12243823ejc.76.1654338933882; Sat, 04 Jun 2022 03:35:33 -0700 (PDT) Received: from localhost.localdomain (92-64-99-37.biz.kpn.net. [92.64.99.37]) by smtp.googlemail.com with ESMTPSA id h1-20020a170906590100b006fe97996423sm3793743ejq.219.2022.06.04.03.35.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 Jun 2022 03:35:33 -0700 (PDT) From: Martijn van Beurden To: ffmpeg-devel@ffmpeg.org Date: Sat, 4 Jun 2022 12:35:06 +0200 Message-Id: <20220604103507.1822192-1-mvanb1@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH v2 1/2] avformat/cafdec: Implement FLAC-in-CAF parsing 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: , Reply-To: FFmpeg development discussions and patches Cc: Martijn van Beurden 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: The afconvert utility shipped with MacOS supports muxing of FLAC in CAF, see afconvert help output on a recent Mac here: https://hydrogenaud.io/index.php?topic=122509.0 A file created with afconvert free of copyright (licensed CC0) can be found here: http://www.audiograaf.nl/misc_stuff/afconvert-FLAC-in-CAF.caf This patch implements parsing of such a file --- libavformat/caf.c | 1 + libavformat/cafdec.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/libavformat/caf.c b/libavformat/caf.c index a700e4055b..a61c39fae5 100644 --- a/libavformat/caf.c +++ b/libavformat/caf.c @@ -46,6 +46,7 @@ const AVCodecTag ff_codec_caf_tags[] = { { AV_CODEC_ID_GSM, MKTAG('a','g','s','m') }, { AV_CODEC_ID_GSM_MS, MKTAG('m','s', 0, '1') }, { AV_CODEC_ID_ILBC, MKTAG('i','l','b','c') }, + { AV_CODEC_ID_FLAC, MKTAG('f','l','a','c') }, { AV_CODEC_ID_MACE3, MKTAG('M','A','C','3') }, { AV_CODEC_ID_MACE6, MKTAG('M','A','C','6') }, { AV_CODEC_ID_MP1, MKTAG('.','m','p','1') }, diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c index 168f69f20b..a9e19df264 100644 --- a/libavformat/cafdec.c +++ b/libavformat/cafdec.c @@ -32,6 +32,7 @@ #include "internal.h" #include "isom.h" #include "mov_chan.h" +#include "libavcodec/flac.h" #include "libavutil/intreadwrite.h" #include "libavutil/intfloat.h" #include "libavutil/dict.h" @@ -170,6 +171,49 @@ static int read_kuki_chunk(AVFormatContext *s, int64_t size) } avio_skip(pb, size - ALAC_NEW_KUKI); } + } else if (st->codecpar->codec_id == AV_CODEC_ID_FLAC) { + int last, type, flac_metadata_size; + uint8_t buf[4]; + /* The magic cookie format for FLAC consists mostly of an mp4 dfLa atom. */ + if (size < (16 + FLAC_STREAMINFO_SIZE)) { + av_log(s, AV_LOG_ERROR, "invalid FLAC magic cookie\n"); + return AVERROR_INVALIDDATA; + } + /* Check cookie version. */ + if (avio_r8(pb) != 0) { + av_log(s, AV_LOG_ERROR, "unknown FLAC magic cookie\n"); + return AVERROR_INVALIDDATA; + } + avio_rb24(pb); /* Flags */ + /* read dfLa fourcc */ + if (avio_read(pb, buf, 4) != 4) { + av_log(s, AV_LOG_ERROR, "failed to read FLAC magic cookie\n"); + return AVERROR_INVALIDDATA; + } + if (memcmp(buf,"dfLa",4)) { + av_log(s, AV_LOG_ERROR, "invalid FLAC magic cookie\n"); + return AVERROR_INVALIDDATA; + } + /* Check dfLa version. */ + if (avio_r8(pb) != 0) { + av_log(s, AV_LOG_ERROR, "unknown dfLa version\n"); + return AVERROR_INVALIDDATA; + } + avio_rb24(pb); /* Flags */ + if (avio_read(pb, buf, sizeof(buf)) != sizeof(buf)) { + av_log(s, AV_LOG_ERROR, "failed to read FLAC metadata block header\n"); + return AVERROR_INVALIDDATA; + } + flac_parse_block_header(buf, &last, &type, &flac_metadata_size); + if (type != FLAC_METADATA_TYPE_STREAMINFO || flac_metadata_size != FLAC_STREAMINFO_SIZE) { + av_log(s, AV_LOG_ERROR, "STREAMINFO must be first FLACMetadataBlock\n"); + return AVERROR_INVALIDDATA; + } + ret = ff_get_extradata(s, st->codecpar, pb, FLAC_STREAMINFO_SIZE); + if (ret < 0) + return ret; + if (!last) + av_log(s, AV_LOG_WARNING, "non-STREAMINFO FLACMetadataBlock(s) ignored\n"); } else if (st->codecpar->codec_id == AV_CODEC_ID_OPUS) { // The data layout for Opus is currently unknown, so we do not export // extradata at all. Multichannel streams are not supported. -- 2.30.2 _______________________________________________ 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".