From patchwork Mon May 18 10:36:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lance Wang X-Patchwork-Id: 19737 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 1378644B70D for ; Mon, 18 May 2020 13:36:38 +0300 (EEST) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id EC28168AA7E; Mon, 18 May 2020 13:36:37 +0300 (EEST) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-pl1-f177.google.com (mail-pl1-f177.google.com [209.85.214.177]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id A7E1E680353 for ; Mon, 18 May 2020 13:36:31 +0300 (EEST) Received: by mail-pl1-f177.google.com with SMTP id s20so4063928plp.6 for ; Mon, 18 May 2020 03:36:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=isLI5dG+TsL5rbl5wnlZZXO0Jp3CzgaOjRJriAEGORs=; b=hFawH+dVmE6jSskBFq+fEiOLADBhNEhBliX+2H96xAbQTXVU4R49syzipT1AGqXGGq mXZJKs4Z2p5EBcFrzGpJB3vycw7vgbmeMU1a9bTCTqZc3Tt+9ecljT0qjRhm+tSlsZr0 PkTR5XDod/jSm8R+sYRvCtnoahKPVP78GLvRz8LzEPQc/AwBnz9Ekzyi3O9oYTuRBjtY OcyZAUKyo0OltyFIsjWktTShgUuRDfKh7wXmxR1SvGQXWUnivx7wCnM2H0sSFhJRh8g2 BHwI1stQZqNVZ3fR2yPcSqIfU6TvpziXMdyDIwCDs860MqDnFkOSzPN2hKd7//Vo3Fxh 1R2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=isLI5dG+TsL5rbl5wnlZZXO0Jp3CzgaOjRJriAEGORs=; b=QRT/ESNKAkU5YgVcz41GA+WdV/h6oYHLX3O22gfPwgGD9TcL3lqGdS86TQGgWI5hTF 9Kkry/mYxGc8gXgsjFZ0/GVrvG0BpJN0memSRwhRlicGsKFQnP5DAIZauVt1Xc4jJj3R gwYnnYSZ2juTT/tVAo05g+210GqF7lwjsJhmtdzDmaSGrU35hZR+hnpaG3bLdCMpp7Uk YEPmg3M8YeRiFLm5wOWzHsxyDCzg16oI0kMCOohUIlfZ8vbu9pe7r4hUS59fxJckWN9S r4e3pQrJAv8Eu84ehSPb/Sj5BWmuAFLmdT6wfaraGz+Pu723nzEVR90X/+OjiksjX+Aa DAVA== X-Gm-Message-State: AOAM533xAb4yCbhSN9lBdKQNsDz/KH9JDxSqpSfmLuoK9y5Y5KP5rpQR LuMQhs5r6tRxCH7UIW0RYjkw1hi7 X-Google-Smtp-Source: ABdhPJxJUiAH9Af6W198QOa+qDfp3i2QB5XlSg5WNhUXqdwpekVpDoAHFIRXcmHkj34JSzOIfAsG9g== X-Received: by 2002:a17:90a:d3d3:: with SMTP id d19mr14044120pjw.42.1589798189413; Mon, 18 May 2020 03:36:29 -0700 (PDT) Received: from vpn2.localdomain ([161.117.202.209]) by smtp.gmail.com with ESMTPSA id mn19sm8183919pjb.8.2020.05.18.03.36.27 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 18 May 2020 03:36:28 -0700 (PDT) From: lance.lmwang@gmail.com To: ffmpeg-devel@ffmpeg.org Date: Mon, 18 May 2020 18:36:24 +0800 Message-Id: <1589798184-22170-1-git-send-email-lance.lmwang@gmail.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1589382763-28061-2-git-send-email-lance.lmwang@gmail.com> References: <1589382763-28061-2-git-send-email-lance.lmwang@gmail.com> Subject: [FFmpeg-devel] [PATCH v3 2/5] avfilter/vf_libopencv: add opencv HaarCascade classifier simple face detection 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 Cc: Limin Wang MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" From: Limin Wang Signed-off-by: Limin Wang --- change the update_metadata() to postprocess() only, I'll add opencv drawbox filter and it need preprocess() to get the meta, so I prefer to change the function name for better readablity, in future, it may have other processing than metadata only. configure | 1 + doc/filters.texi | 29 +++++++ libavfilter/vf_libopencv.c | 164 ++++++++++++++++++++++++++++++++++++- 3 files changed, 191 insertions(+), 3 deletions(-) diff --git a/configure b/configure index 34afdaad28..281b67efc4 100755 --- a/configure +++ b/configure @@ -2123,6 +2123,7 @@ HEADERS_LIST=" machine_ioctl_meteor_h malloc_h opencv2_core_core_c_h + opencv2_objdetect_objdetect_c_h OpenGL_gl3_h poll_h sys_param_h diff --git a/doc/filters.texi b/doc/filters.texi index d9ba0fffa1..f938dd04de 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -14177,6 +14177,35 @@ other parameters is 0. These parameters correspond to the parameters assigned to the libopencv function @code{cvSmooth}. +@subsection facedetect +Face detection using Haar Feature-based Cascade Classifiers. + +The filter takes the following parameters: +@var{xml_model}|@var{qoffset}. + +@var{xml_model} is the path of pre-trained classifiers, The C API still +does not support the newer cascade format, please use the old format +haarcascade_frontalface_alt.xml which type_id is opencv-haar-classifier. + +@var{qoffset} +If you want export the detected faces by ROI side data in frame, please set the +parameters, See also the @ref{addroi} filter. The range of qoffset is from [-1.0, 1.0] + +By default the filter will report these metadata values if face are +detected: +@table @option +@item lavfi.facedetect.nb_faces +Display the detected face number + +@item lavfi.facedetect.face_id.x, lavfi.facedetect.face_id.y +Display x and y of every faces, face_id is the face index which is range +from [0, nb_faces-1] + +@item lavfi.facedetect.face_id.w, lavfi.facedetect.face_id.h +Display width and height of every faces, face_id is the face index +which is range from [0, nb_faces-1] +@end table + @section oscilloscope 2D Video Oscilloscope. diff --git a/libavfilter/vf_libopencv.c b/libavfilter/vf_libopencv.c index 8128030b8c..b2d19bb241 100644 --- a/libavfilter/vf_libopencv.c +++ b/libavfilter/vf_libopencv.c @@ -1,5 +1,6 @@ /* * Copyright (c) 2010 Stefano Sabatini + * Copyright (c) 2020 Limin Wang * * This file is part of FFmpeg. * @@ -27,10 +28,16 @@ #if HAVE_OPENCV2_CORE_CORE_C_H #include #include +#if HAVE_OPENCV2_OBJECTDETECT_OBJECTDETECT_C_H +#include +#else +#include +#endif #else #include #include #endif + #include "libavutil/avstring.h" #include "libavutil/common.h" #include "libavutil/file.h" @@ -82,6 +89,7 @@ typedef struct OCVContext { int (*init)(AVFilterContext *ctx, const char *args); void (*uninit)(AVFilterContext *ctx); void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg); + void (*postprocess)(AVFilterContext *ctx, AVFrame *out); void *priv; } OCVContext; @@ -326,18 +334,152 @@ static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplIma cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations); } +typedef struct FaceDetectContext { + char *xml_model; + CvHaarClassifierCascade* cascade; + CvMemStorage* storage; + int nb_faces; + CvSeq *faces; + int add_roi; + AVRational qoffset; +} FaceDetectContext; + +static av_cold int facedetect_init(AVFilterContext *ctx, const char *args) +{ + OCVContext *s = ctx->priv; + FaceDetectContext *facedetect = s->priv; + const char *buf = args; + double qoffset; + + if (args) { + facedetect->xml_model = av_get_token(&buf, "|"); + if (!facedetect->xml_model) { + av_log(ctx, AV_LOG_ERROR, "failed to get %s, %s\n", args, facedetect->xml_model); + return AVERROR(EINVAL); + } + + if (buf && sscanf(buf, "|%lf", &qoffset) == 1) { + if (qoffset < -1.0 || qoffset > 1.0) { + av_log(ctx, AV_LOG_ERROR, "failed to get valid qoffset(%f))\n", qoffset); + return AVERROR(EINVAL); + } + facedetect->add_roi = 1; + facedetect->qoffset = av_d2q(qoffset, 255); + } + } else { + av_log(ctx, AV_LOG_ERROR, "failed to get haarcascade_frontalface_alt.xml model file\n"); + return AVERROR(EINVAL); + } + + av_log(ctx, AV_LOG_VERBOSE, "xml_model: %s add_roi: %d qoffset: %d/%d\n", + facedetect->xml_model, facedetect->add_roi, facedetect->qoffset.num, facedetect->qoffset.den); + + facedetect->storage = cvCreateMemStorage(0); + if (!facedetect->storage) { + av_log(ctx, AV_LOG_ERROR, "cvCreateMemStorage() failed\n"); + return AVERROR(EINVAL); + } + cvClearMemStorage(facedetect->storage); + + facedetect->cascade = (CvHaarClassifierCascade*)cvLoad( facedetect->xml_model, NULL, NULL, NULL ); + if (!facedetect->cascade) { + av_log(ctx, AV_LOG_ERROR, "failed to load classifier cascade: %s \n", facedetect->xml_model); + return AVERROR(EINVAL); + } + + return 0; +} + +static av_cold void facedetect_uninit(AVFilterContext *ctx) +{ + OCVContext *s = ctx->priv; + FaceDetectContext *facedetect = s->priv; + + if (facedetect->cascade) + cvReleaseHaarClassifierCascade(&facedetect->cascade); + if (facedetect->storage) + cvReleaseMemStorage(&facedetect->storage); +} + +static void set_meta_int(AVDictionary **metadata, const char *key, int idx, int d) +{ + char value[128]; + char key2[128]; + + snprintf(value, sizeof(value), "%d", d); + snprintf(key2, sizeof(key2), "lavfi.facedetect.%d.%s", idx, key); + av_dict_set(metadata, key2, value, 0); +} + +static void facedetect_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg) +{ + OCVContext *s = ctx->priv; + FaceDetectContext *facedetect = s->priv; + + facedetect->faces = cvHaarDetectObjects(inimg, facedetect->cascade, facedetect->storage, + 1.25, 3, CV_HAAR_DO_CANNY_PRUNING, + cvSize(inimg->width/16,inimg->height/16), cvSize(0,0)); + + facedetect->nb_faces = facedetect->faces ? facedetect->faces->total : 0; +} + +static void facedetect_postprocess(AVFilterContext *ctx, AVFrame *out) +{ + OCVContext *s = ctx->priv; + FaceDetectContext *facedetect = s->priv; + AVRegionOfInterest *roi; + AVFrameSideData *sd; + AVBufferRef *roi_buf; + int i; + + if (facedetect->add_roi && facedetect->nb_faces > 0) { + sd = av_frame_new_side_data(out, AV_FRAME_DATA_REGIONS_OF_INTEREST, + facedetect->nb_faces * sizeof(AVRegionOfInterest)); + if (!sd) { + return AVERROR(ENOMEM); + } + roi = (AVRegionOfInterest*)sd->data; + for(i = 0; i < facedetect->nb_faces; i++ ) { + CvRect *r = (CvRect*) cvGetSeqElem(facedetect->faces, i); + + roi[i] = (AVRegionOfInterest) { + .self_size = sizeof(*roi), + .top = r->y, + .bottom = r->y + r->height, + .left = r->x, + .right = r->x + r->width, + .qoffset = facedetect->qoffset, + }; + } + } + + if (facedetect->nb_faces > 0) + av_dict_set_int(&out->metadata, "lavfi.facedetect.nb_faces", facedetect->nb_faces, 0); + + for(i = 0; i < facedetect->nb_faces; i++ ) { + CvRect *r = (CvRect*) cvGetSeqElem(facedetect->faces, i); + + set_meta_int(&out->metadata, "x", i, r->x); + set_meta_int(&out->metadata, "y", i, r->y); + set_meta_int(&out->metadata, "w", i, r->width); + set_meta_int(&out->metadata, "h", i, r->height); + } +} + typedef struct OCVFilterEntry { const char *name; size_t priv_size; int (*init)(AVFilterContext *ctx, const char *args); void (*uninit)(AVFilterContext *ctx); void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg); + void (*postprocess)(AVFilterContext *ctx, AVFrame *out); } OCVFilterEntry; static const OCVFilterEntry ocv_filter_entries[] = { - { "dilate", sizeof(DilateContext), dilate_init, dilate_uninit, dilate_end_frame_filter }, - { "erode", sizeof(DilateContext), dilate_init, dilate_uninit, erode_end_frame_filter }, - { "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter }, + { "dilate", sizeof(DilateContext), dilate_init, dilate_uninit, dilate_end_frame_filter, NULL }, + { "erode", sizeof(DilateContext), dilate_init, dilate_uninit, erode_end_frame_filter, NULL }, + { "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter, NULL }, + { "facedetect", sizeof(FaceDetectContext), facedetect_init, facedetect_uninit, facedetect_end_frame_filter, facedetect_postprocess }, }; static av_cold int init(AVFilterContext *ctx) @@ -355,6 +497,7 @@ static av_cold int init(AVFilterContext *ctx) s->init = entry->init; s->uninit = entry->uninit; s->end_frame_filter = entry->end_frame_filter; + s->postprocess = entry->postprocess; if (!(s->priv = av_mallocz(entry->priv_size))) return AVERROR(ENOMEM); @@ -383,18 +526,33 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in) AVFrame *out; IplImage inimg, outimg; + /* facedetect filter will passthrought the input frame */ + if (strcmp(s->name, "facedetect")) { out = ff_get_video_buffer(outlink, outlink->w, outlink->h); if (!out) { av_frame_free(&in); return AVERROR(ENOMEM); } av_frame_copy_props(out, in); + } else { + out = in; + } fill_iplimage_from_frame(&inimg , in , inlink->format); + + if (strcmp(s->name, "facedetect")) { fill_iplimage_from_frame(&outimg, out, inlink->format); s->end_frame_filter(ctx, &inimg, &outimg); fill_frame_from_iplimage(out, &outimg, inlink->format); + } else { + s->end_frame_filter(ctx, &inimg, NULL); + } + + if (s->postprocess) { + s->postprocess(ctx, out); + } + if (out != in) av_frame_free(&in); return ff_filter_frame(outlink, out);