From patchwork Thu Oct 18 12:00:06 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul B Mahol X-Patchwork-Id: 10707 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 50827446E7D for ; Thu, 18 Oct 2018 15:06:51 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id A32C168A696; Thu, 18 Oct 2018 15:06:32 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-ed1-f66.google.com (mail-ed1-f66.google.com [209.85.208.66]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 207F368A562 for ; Thu, 18 Oct 2018 15:06:26 +0300 (EEST) Received: by mail-ed1-f66.google.com with SMTP id x31-v6so27984653edd.8 for ; Thu, 18 Oct 2018 05:06:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=KX62reAn9ZJB9s/4Xd+TS/DaBp1T4n+rmRJED/0NJ0Q=; b=Aw7aDC4iq+DTZz1/YwVvT9GhZyzBfvIGETdkouiT1FHTeh89TghhhWf1/cANbX/aqC qTUPKVXXkwS7aCZwNENoz8zt4zuuqWruIfJPoBH8+sm/Ric0d+8SQowVNj5bOePBJSd9 T+qaPj+LBWHZMBf8la+vikovONVliL7hq4nrdgGAbx+YBgeYZdIKnOw3XBLk4ICsXMo/ 316xKFVybXpucvLpoBUFJz/ml35MfVyllM/rhfUQ3LVK4IHsagOunBOqS16dWcQFaUlS 2Ds9i1q5Ra1D47to54FNau1T6/g7EkKpIJKyql66FdENk3q0zE45LzJevVmfmItlG/0c LgYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=KX62reAn9ZJB9s/4Xd+TS/DaBp1T4n+rmRJED/0NJ0Q=; b=qtXcVXbj0V1O1LrfesTRr0or1JzLbqX4LOTHxMs1+LKc0AKsC+1DZ+zhstGJuzK6oA tcMFdqgFAHx6d75CLkPsi1x3Qy7UWF/PUn/++Rfp5NqIURboyI2QeMQezn+554wR+3Ks rRHoEWEMGt3T1JpZEVR0pIgs9btqf87P/477LqaPmvos/V0PwR8q5qkA42/UVWzHh7IR 91HgXFwqeY8UxPJI8oK9VMZWlB9EDyScJXUXJDfhCdB3lrfB/1IZrVM6ASk0P7lTa5Cb 0DsKlxBptY7ieaZdCkpXIr9glfOcFGp79nOb6AUNl849kFKgAhtUISMtTAtBSNjAvZ1l 7qsg== X-Gm-Message-State: ABuFfojCs5QrxhGoE1fFrcfduiLMyICmGzdvdjujxZGgarKC7SSrLPW6 jiyoyQQA3FrTrVLgdlNykHuKP9tAeK4= X-Google-Smtp-Source: ACcGV62z3rDGmHnT/HNBeumWCD97h2atFigeoRgfIjHiCVQ0PpNbvWDKbec0bANg+RCWolzckysdsA== X-Received: by 2002:a17:906:d20d:: with SMTP id w13-v6mr28824108ejz.5.1539864039495; Thu, 18 Oct 2018 05:00:39 -0700 (PDT) Received: from localhost.localdomain ([94.250.174.60]) by smtp.gmail.com with ESMTPSA id x53-v6sm8942120edx.63.2018.10.18.05.00.38 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 Oct 2018 05:00:39 -0700 (PDT) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Thu, 18 Oct 2018 14:00:06 +0200 Message-Id: <20181018120006.26365-1-onemda@gmail.com> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH] avfilter: add chromahold 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 MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Signed-off-by: Paul B Mahol --- doc/filters.texi | 20 ++++++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_chromakey.c | 96 +++++++++++++++++++++++++++++++++++++- 4 files changed, 116 insertions(+), 2 deletions(-) diff --git a/doc/filters.texi b/doc/filters.texi index cadf78c93c..0835a8ef43 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -6120,6 +6120,26 @@ Only deinterlace frames marked as interlaced. The default value is @code{all}. @end table +@section chromahold +Remove all color infomation for all colors except for certain one. + +The filter accepts the following options: + +@table @option +@item color +The color which will be not be replaced with neutral chroma. + +@item similarity +Similarity percentage with the above color. +0.01 matches only the exact key color, while 1.0 matches everything. + +@item yuv +Signals that the color passed is already in YUV instead of RGB. + +Literal colors like "green" or "red" don't make sense with this enabled anymore. +This can be used to pass exact YUV values as hexadecimal numbers. +@end table + @section chromakey YUV colorspace color/chroma keying. diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 62cc2f561f..077415a909 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -165,6 +165,7 @@ OBJS-$(CONFIG_BOXBLUR_FILTER) += vf_boxblur.o boxblur.o OBJS-$(CONFIG_BOXBLUR_OPENCL_FILTER) += vf_avgblur_opencl.o opencl.o \ opencl/avgblur.o boxblur.o OBJS-$(CONFIG_BWDIF_FILTER) += vf_bwdif.o +OBJS-$(CONFIG_CHROMAHOLD_FILTER) += vf_chromakey.o OBJS-$(CONFIG_CHROMAKEY_FILTER) += vf_chromakey.o OBJS-$(CONFIG_CIESCOPE_FILTER) += vf_ciescope.o OBJS-$(CONFIG_CODECVIEW_FILTER) += vf_codecview.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 5e72803b13..6078a948d2 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -155,6 +155,7 @@ extern AVFilter ff_vf_bm3d; extern AVFilter ff_vf_boxblur; extern AVFilter ff_vf_boxblur_opencl; extern AVFilter ff_vf_bwdif; +extern AVFilter ff_vf_chromahold; extern AVFilter ff_vf_chromakey; extern AVFilter ff_vf_ciescope; extern AVFilter ff_vf_codecview; diff --git a/libavfilter/vf_chromakey.c b/libavfilter/vf_chromakey.c index 88414783bc..42b7d71d49 100644 --- a/libavfilter/vf_chromakey.c +++ b/libavfilter/vf_chromakey.c @@ -38,6 +38,9 @@ typedef struct ChromakeyContext { int hsub_log2; int vsub_log2; + + int (*do_slice)(AVFilterContext *ctx, void *arg, + int jobnr, int nb_jobs); } ChromakeyContext; static uint8_t do_chromakey_pixel(ChromakeyContext *ctx, uint8_t u[9], uint8_t v[9]) @@ -103,12 +106,45 @@ static int do_chromakey_slice(AVFilterContext *avctx, void *arg, int jobnr, int return 0; } +static int do_chromahold_slice(AVFilterContext *avctx, void *arg, int jobnr, int nb_jobs) +{ + ChromakeyContext *ctx = avctx->priv; + AVFrame *frame = arg; + const int slice_start = ((frame->height >> ctx->vsub_log2) * jobnr) / nb_jobs; + const int slice_end = ((frame->height >> ctx->vsub_log2) * (jobnr + 1)) / nb_jobs; + + int x, y, alpha; + + for (y = slice_start; y < slice_end; ++y) { + for (x = 0; x < frame->width >> ctx->hsub_log2; ++x) { + int u = frame->data[1][frame->linesize[1] * y + x]; + int v = frame->data[2][frame->linesize[2] * y + x]; + double diff; + int du, dv; + + du = u - ctx->chromakey_uv[0]; + dv = v - ctx->chromakey_uv[1]; + + diff = sqrt((du * du + dv * dv) / (255.0 * 255.0)); + + alpha = diff > ctx->similarity; + if (alpha) { + frame->data[1][frame->linesize[1] * y + x] = 128; + frame->data[2][frame->linesize[2] * y + x] = 128; + } + } + } + + return 0; +} + static int filter_frame(AVFilterLink *link, AVFrame *frame) { AVFilterContext *avctx = link->dst; + ChromakeyContext *ctx = avctx->priv; int res; - if (res = avctx->internal->execute(avctx, do_chromakey_slice, frame, NULL, FFMIN(frame->height, ff_filter_get_nb_threads(avctx)))) + if (res = avctx->internal->execute(avctx, ctx->do_slice, frame, NULL, FFMIN(frame->height, ff_filter_get_nb_threads(avctx)))) return res; return ff_filter_frame(avctx->outputs[0], frame); @@ -130,6 +166,12 @@ static av_cold int initialize_chromakey(AVFilterContext *avctx) ctx->chromakey_uv[1] = RGB_TO_V(ctx->chromakey_rgba); } + if (!strcmp(avctx->filter->name, "chromakey")) { + ctx->do_slice = do_chromakey_slice; + } else { + ctx->do_slice = do_chromahold_slice; + } + return 0; } @@ -142,9 +184,19 @@ static av_cold int query_formats(AVFilterContext *avctx) AV_PIX_FMT_NONE }; + static const enum AVPixelFormat hold_pixel_fmts[] = { + AV_PIX_FMT_YUV420P, + AV_PIX_FMT_YUV422P, + AV_PIX_FMT_YUV444P, + AV_PIX_FMT_YUVA420P, + AV_PIX_FMT_YUVA422P, + AV_PIX_FMT_YUVA444P, + AV_PIX_FMT_NONE + }; + AVFilterFormats *formats = NULL; - formats = ff_make_format_list(pixel_fmts); + formats = ff_make_format_list(!strcmp(avctx->filter->name, "chromahold") ? hold_pixel_fmts : pixel_fmts); if (!formats) return AVERROR(ENOMEM); @@ -206,3 +258,43 @@ AVFilter ff_vf_chromakey = { .outputs = chromakey_outputs, .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, }; + +static const AVOption chromahold_options[] = { + { "color", "set the chromahold key color", OFFSET(chromakey_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS }, + { "similarity", "set the chromahold similarity value", OFFSET(similarity), AV_OPT_TYPE_FLOAT, { .dbl = 0.01 }, 0.01, 1.0, FLAGS }, + { "yuv", "color parameter is in yuv instead of rgb", OFFSET(is_yuv), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS }, + { NULL } +}; + +static const AVFilterPad chromahold_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .needs_writable = 1, + .filter_frame = filter_frame, + .config_props = config_input, + }, + { NULL } +}; + +static const AVFilterPad chromahold_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(chromahold); + +AVFilter ff_vf_chromahold = { + .name = "chromahold", + .description = NULL_IF_CONFIG_SMALL("Turns a certain color range into gray."), + .priv_size = sizeof(ChromakeyContext), + .priv_class = &chromahold_class, + .init = initialize_chromakey, + .query_formats = query_formats, + .inputs = chromahold_inputs, + .outputs = chromahold_outputs, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS, +};