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 CFED04554A for ; Wed, 1 Feb 2023 05:42:08 +0000 (UTC) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 34D8068BEC0; Wed, 1 Feb 2023 07:41:53 +0200 (EET) Received: from mail-il1-f181.google.com (mail-il1-f181.google.com [209.85.166.181]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id AB12768BEAA for ; Wed, 1 Feb 2023 07:41:46 +0200 (EET) Received: by mail-il1-f181.google.com with SMTP id l15so3664715ilj.5 for ; Tue, 31 Jan 2023 21:41:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=QurPmiFdMb1oZIr2p1gdInjTmf5TObwWR5sd9OrRXIs=; b=fwTut754SEsma7VKqNf9/E97B/0qGIUBRwqCRy/Zg9uwF9cHy4nmxupvmUmCT7SLn9 zIpshF31GNwARuFbMyh7X1Z+vMbAck13x3Zog6udNpnhfCdQDPofpYCI8dJVfzGG3l8S tBjREAp8e4gt5fKDwvVDHHItBZA/Pwq4rZ+7wyI3sUegWEkjlG25T9g3MB++XB5Ku13f Ethk1wzMqOoNCt7etQ8qgAbhabrYJKaYWI7YdTHVbu74LiIU568RKNTmyFlmU1SsGJ87 wr2IXLsXHYh4xZzzgLj8yfntedej3SzjInsMZkEtgsDCbJOBn5ICTg3AgzW58g/vSMk1 cggg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=QurPmiFdMb1oZIr2p1gdInjTmf5TObwWR5sd9OrRXIs=; b=SFPPM6HZI/S13wn9dfdKiVbJJueoLRn+2/xGAkBY271VyOzIZAUsJYq15ZAqKnrQ1C JZigwdtkH5WFJXiBsDuW8LaD6+MLVDxCTzsoEcSYPTOg6lxfHIEiprHcYGnfEujlxY/F dIIeYKX5BAfvN1ndwX9NKDQfTw8clKlIa/n0Ytyjql60TbuF5/RqgRcaRREiB4aFx7Gn 9Xj3ipPQ7QEuIZd28wlNskkmpmDB4jBsGQWvSJqzBl9BDLSZbiBbatZ8EknhYDhV549w jEAWCZSc7El8XrtnKva4StTYS2LjHX1dPIPiC4ib1ktnsYlZ9CVNjtSfUnY5HBuECrJO ngzw== X-Gm-Message-State: AO0yUKVnBOzu88E3majjbJXiHsijaf2Me/ArLBROeUHJvciSSnbmyaKO ji15sfM9J54YXwXeQfPY9z+Bn7ICzHhvyA== X-Google-Smtp-Source: AK7set/g5sEzLmP+gpPIbbSucDsvkg9WmVTbRDBgPAIBM6aOzMdXhQYs2Z9SbRKzMDveW9arWQI0WQ== X-Received: by 2002:a05:6e02:152:b0:310:cc70:a152 with SMTP id j18-20020a056e02015200b00310cc70a152mr823707ilr.2.1675230105300; Tue, 31 Jan 2023 21:41:45 -0800 (PST) Received: from gauss.local (c-68-41-54-207.hsd1.mi.comcast.net. [68.41.54.207]) by smtp.gmail.com with ESMTPSA id q5-20020a02a305000000b0035678e2e175sm3549891jai.50.2023.01.31.21.41.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 31 Jan 2023 21:41:45 -0800 (PST) From: Leo Izen To: ffmpeg-devel@ffmpeg.org Date: Wed, 1 Feb 2023 00:41:29 -0500 Message-Id: <20230201054129.124226-3-leo.izen@gmail.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230201054129.124226-1-leo.izen@gmail.com> References: <20230201054129.124226-1-leo.izen@gmail.com> MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH 2/2] avcodec/pngenc: write sBIT chunks 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: Leo Izen 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: Add support for writing sBIT chunks, which mark the significant bit depth of the PNG file. This obtains the metadata using the field bits_per_raw_sample of AVCodecContext. Signed-off-by: Leo Izen --- libavcodec/pngenc.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/libavcodec/pngenc.c b/libavcodec/pngenc.c index 2393161c3b..0961125f0a 100644 --- a/libavcodec/pngenc.c +++ b/libavcodec/pngenc.c @@ -432,6 +432,13 @@ static int encode_headers(AVCodecContext *avctx, const AVFrame *pict) if (png_get_gama(pict->color_trc, s->buf)) png_write_chunk(&s->bytestream, MKTAG('g', 'A', 'M', 'A'), s->buf, 4); + if (avctx->bits_per_raw_sample > 0 && avctx->bits_per_raw_sample < s->bit_depth) { + size_t len = s->color_type == 0 ? 1 : s->color_type == 2 || s->color_type == 3 ? 3 : + s->color_type == 4 ? 2 : 4; + memset(s->buf, avctx->bits_per_raw_sample, len); + png_write_chunk(&s->bytestream, MKTAG('s', 'B', 'I', 'T'), s->buf, len); + } + side_data = av_frame_get_side_data(pict, AV_FRAME_DATA_ICC_PROFILE); if ((ret = png_write_iccp(s, side_data))) return ret; -- 2.39.1 _______________________________________________ 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".