| /* |
| * Copyright (c) 2010 Stefano Sabatini |
| * |
| * 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 |
| * libopencv wrapper functions |
| */ |
| |
| #include "config.h" |
| #if HAVE_OPENCV2_CORE_CORE_C_H |
| #include <opencv2/core/core_c.h> |
| #include <opencv2/imgproc/imgproc_c.h> |
| #else |
| #include <opencv/cv.h> |
| #include <opencv/cxcore.h> |
| #endif |
| #include "libavutil/avstring.h" |
| #include "libavutil/common.h" |
| #include "libavutil/file.h" |
| #include "libavutil/opt.h" |
| #include "avfilter.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "video.h" |
| |
| static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, enum AVPixelFormat pixfmt) |
| { |
| IplImage *tmpimg; |
| int depth, channels_nb; |
| |
| if (pixfmt == AV_PIX_FMT_GRAY8) { depth = IPL_DEPTH_8U; channels_nb = 1; } |
| else if (pixfmt == AV_PIX_FMT_BGRA) { depth = IPL_DEPTH_8U; channels_nb = 4; } |
| else if (pixfmt == AV_PIX_FMT_BGR24) { depth = IPL_DEPTH_8U; channels_nb = 3; } |
| else return; |
| |
| tmpimg = cvCreateImageHeader((CvSize){frame->width, frame->height}, depth, channels_nb); |
| *img = *tmpimg; |
| img->imageData = img->imageDataOrigin = frame->data[0]; |
| img->dataOrder = IPL_DATA_ORDER_PIXEL; |
| img->origin = IPL_ORIGIN_TL; |
| img->widthStep = frame->linesize[0]; |
| } |
| |
| static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt) |
| { |
| frame->linesize[0] = img->widthStep; |
| frame->data[0] = img->imageData; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| static const enum AVPixelFormat pix_fmts[] = { |
| AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE |
| }; |
| AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
| if (!fmts_list) |
| return AVERROR(ENOMEM); |
| return ff_set_common_formats(ctx, fmts_list); |
| } |
| |
| typedef struct OCVContext { |
| const AVClass *class; |
| char *name; |
| char *params; |
| int (*init)(AVFilterContext *ctx, const char *args); |
| void (*uninit)(AVFilterContext *ctx); |
| void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg); |
| void *priv; |
| } OCVContext; |
| |
| typedef struct SmoothContext { |
| int type; |
| int param1, param2; |
| double param3, param4; |
| } SmoothContext; |
| |
| static av_cold int smooth_init(AVFilterContext *ctx, const char *args) |
| { |
| OCVContext *s = ctx->priv; |
| SmoothContext *smooth = s->priv; |
| char type_str[128] = "gaussian"; |
| |
| smooth->param1 = 3; |
| smooth->param2 = 0; |
| smooth->param3 = 0.0; |
| smooth->param4 = 0.0; |
| |
| if (args) |
| sscanf(args, "%127[^|]|%d|%d|%lf|%lf", type_str, &smooth->param1, &smooth->param2, &smooth->param3, &smooth->param4); |
| |
| if (!strcmp(type_str, "blur" )) smooth->type = CV_BLUR; |
| else if (!strcmp(type_str, "blur_no_scale")) smooth->type = CV_BLUR_NO_SCALE; |
| else if (!strcmp(type_str, "median" )) smooth->type = CV_MEDIAN; |
| else if (!strcmp(type_str, "gaussian" )) smooth->type = CV_GAUSSIAN; |
| else if (!strcmp(type_str, "bilateral" )) smooth->type = CV_BILATERAL; |
| else { |
| av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown.\n", type_str); |
| return AVERROR(EINVAL); |
| } |
| |
| if (smooth->param1 < 0 || !(smooth->param1%2)) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Invalid value '%d' for param1, it has to be a positive odd number\n", |
| smooth->param1); |
| return AVERROR(EINVAL); |
| } |
| if ((smooth->type == CV_BLUR || smooth->type == CV_BLUR_NO_SCALE || smooth->type == CV_GAUSSIAN) && |
| (smooth->param2 < 0 || (smooth->param2 && !(smooth->param2%2)))) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Invalid value '%d' for param2, it has to be zero or a positive odd number\n", |
| smooth->param2); |
| return AVERROR(EINVAL); |
| } |
| |
| av_log(ctx, AV_LOG_VERBOSE, "type:%s param1:%d param2:%d param3:%f param4:%f\n", |
| type_str, smooth->param1, smooth->param2, smooth->param3, smooth->param4); |
| return 0; |
| } |
| |
| static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg) |
| { |
| OCVContext *s = ctx->priv; |
| SmoothContext *smooth = s->priv; |
| cvSmooth(inimg, outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4); |
| } |
| |
| static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename, |
| void *log_ctx) |
| { |
| uint8_t *buf, *p, *pend; |
| size_t size; |
| int ret, i, j, w; |
| |
| if ((ret = av_file_map(filename, &buf, &size, 0, log_ctx)) < 0) |
| return ret; |
| |
| /* prescan file to get the number of lines and the maximum width */ |
| w = 0; |
| for (i = 0; i < size; i++) { |
| if (buf[i] == '\n') { |
| if (*rows == INT_MAX) { |
| av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of rows in the file\n"); |
| ret = AVERROR_INVALIDDATA; |
| goto end; |
| } |
| ++(*rows); |
| *cols = FFMAX(*cols, w); |
| w = 0; |
| } else if (w == INT_MAX) { |
| av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of columns in the file\n"); |
| return AVERROR_INVALIDDATA; |
| } |
| w++; |
| } |
| if (*rows > (SIZE_MAX / sizeof(int) / *cols)) { |
| av_log(log_ctx, AV_LOG_ERROR, "File with size %dx%d is too big\n", |
| *rows, *cols); |
| ret = AVERROR_INVALIDDATA; |
| goto end; |
| } |
| if (!(*values = av_mallocz_array(sizeof(int) * *rows, *cols))) { |
| ret = AVERROR(ENOMEM); |
| goto end; |
| } |
| |
| /* fill *values */ |
| p = buf; |
| pend = buf + size-1; |
| for (i = 0; i < *rows; i++) { |
| for (j = 0;; j++) { |
| if (p > pend || *p == '\n') { |
| p++; |
| break; |
| } else |
| (*values)[*cols*i + j] = !!av_isgraph(*(p++)); |
| } |
| } |
| |
| end: |
| av_file_unmap(buf, size); |
| |
| #ifdef DEBUG |
| { |
| char *line; |
| if (!(line = av_malloc(*cols + 1))) |
| return AVERROR(ENOMEM); |
| for (i = 0; i < *rows; i++) { |
| for (j = 0; j < *cols; j++) |
| line[j] = (*values)[i * *cols + j] ? '@' : ' '; |
| line[j] = 0; |
| av_log(log_ctx, AV_LOG_DEBUG, "%3d: %s\n", i, line); |
| } |
| av_free(line); |
| } |
| #endif |
| |
| return 0; |
| } |
| |
| static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx) |
| { |
| char shape_filename[128] = "", shape_str[32] = "rect"; |
| int cols = 0, rows = 0, anchor_x = 0, anchor_y = 0, shape = CV_SHAPE_RECT; |
| int *values = NULL, ret = 0; |
| |
| sscanf(buf, "%dx%d+%dx%d/%32[^=]=%127s", &cols, &rows, &anchor_x, &anchor_y, shape_str, shape_filename); |
| |
| if (!strcmp(shape_str, "rect" )) shape = CV_SHAPE_RECT; |
| else if (!strcmp(shape_str, "cross" )) shape = CV_SHAPE_CROSS; |
| else if (!strcmp(shape_str, "ellipse")) shape = CV_SHAPE_ELLIPSE; |
| else if (!strcmp(shape_str, "custom" )) { |
| shape = CV_SHAPE_CUSTOM; |
| if ((ret = read_shape_from_file(&cols, &rows, &values, shape_filename, log_ctx)) < 0) |
| return ret; |
| } else { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Shape unspecified or type '%s' unknown.\n", shape_str); |
| ret = AVERROR(EINVAL); |
| goto out; |
| } |
| |
| if (rows <= 0 || cols <= 0) { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Invalid non-positive values for shape size %dx%d\n", cols, rows); |
| ret = AVERROR(EINVAL); |
| goto out; |
| } |
| |
| if (anchor_x < 0 || anchor_y < 0 || anchor_x >= cols || anchor_y >= rows) { |
| av_log(log_ctx, AV_LOG_ERROR, |
| "Shape anchor %dx%d is not inside the rectangle with size %dx%d.\n", |
| anchor_x, anchor_y, cols, rows); |
| ret = AVERROR(EINVAL); |
| goto out; |
| } |
| |
| *kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values); |
| if (!*kernel) { |
| ret = AVERROR(ENOMEM); |
| goto out; |
| } |
| |
| av_log(log_ctx, AV_LOG_VERBOSE, "Structuring element: w:%d h:%d x:%d y:%d shape:%s\n", |
| rows, cols, anchor_x, anchor_y, shape_str); |
| out: |
| av_freep(&values); |
| return ret; |
| } |
| |
| typedef struct DilateContext { |
| int nb_iterations; |
| IplConvKernel *kernel; |
| } DilateContext; |
| |
| static av_cold int dilate_init(AVFilterContext *ctx, const char *args) |
| { |
| OCVContext *s = ctx->priv; |
| DilateContext *dilate = s->priv; |
| char default_kernel_str[] = "3x3+0x0/rect"; |
| char *kernel_str = NULL; |
| const char *buf = args; |
| int ret; |
| |
| if (args) { |
| kernel_str = av_get_token(&buf, "|"); |
| |
| if (!kernel_str) |
| return AVERROR(ENOMEM); |
| } |
| |
| ret = parse_iplconvkernel(&dilate->kernel, |
| (!kernel_str || !*kernel_str) ? default_kernel_str |
| : kernel_str, |
| ctx); |
| av_free(kernel_str); |
| if (ret < 0) |
| return ret; |
| |
| if (!buf || sscanf(buf, "|%d", &dilate->nb_iterations) != 1) |
| dilate->nb_iterations = 1; |
| av_log(ctx, AV_LOG_VERBOSE, "iterations_nb:%d\n", dilate->nb_iterations); |
| if (dilate->nb_iterations <= 0) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid non-positive value '%d' for nb_iterations\n", |
| dilate->nb_iterations); |
| return AVERROR(EINVAL); |
| } |
| return 0; |
| } |
| |
| static av_cold void dilate_uninit(AVFilterContext *ctx) |
| { |
| OCVContext *s = ctx->priv; |
| DilateContext *dilate = s->priv; |
| |
| cvReleaseStructuringElement(&dilate->kernel); |
| } |
| |
| static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg) |
| { |
| OCVContext *s = ctx->priv; |
| DilateContext *dilate = s->priv; |
| cvDilate(inimg, outimg, dilate->kernel, dilate->nb_iterations); |
| } |
| |
| static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg) |
| { |
| OCVContext *s = ctx->priv; |
| DilateContext *dilate = s->priv; |
| cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations); |
| } |
| |
| 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); |
| } 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 }, |
| }; |
| |
| static av_cold int init(AVFilterContext *ctx) |
| { |
| OCVContext *s = ctx->priv; |
| int i; |
| |
| if (!s->name) { |
| av_log(ctx, AV_LOG_ERROR, "No libopencv filter name specified\n"); |
| return AVERROR(EINVAL); |
| } |
| for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) { |
| const OCVFilterEntry *entry = &ocv_filter_entries[i]; |
| if (!strcmp(s->name, entry->name)) { |
| s->init = entry->init; |
| s->uninit = entry->uninit; |
| s->end_frame_filter = entry->end_frame_filter; |
| |
| if (!(s->priv = av_mallocz(entry->priv_size))) |
| return AVERROR(ENOMEM); |
| return s->init(ctx, s->params); |
| } |
| } |
| |
| av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", s->name); |
| return AVERROR(EINVAL); |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| OCVContext *s = ctx->priv; |
| |
| if (s->uninit) |
| s->uninit(ctx); |
| av_freep(&s->priv); |
| } |
| |
| static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| OCVContext *s = ctx->priv; |
| AVFilterLink *outlink= inlink->dst->outputs[0]; |
| AVFrame *out; |
| IplImage inimg, outimg; |
| |
| 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); |
| |
| fill_iplimage_from_frame(&inimg , in , inlink->format); |
| fill_iplimage_from_frame(&outimg, out, inlink->format); |
| s->end_frame_filter(ctx, &inimg, &outimg); |
| fill_frame_from_iplimage(out, &outimg, inlink->format); |
| |
| av_frame_free(&in); |
| |
| return ff_filter_frame(outlink, out); |
| } |
| |
| #define OFFSET(x) offsetof(OCVContext, x) |
| #define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
| static const AVOption ocv_options[] = { |
| { "filter_name", NULL, OFFSET(name), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
| { "filter_params", NULL, OFFSET(params), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
| { NULL } |
| }; |
| |
| AVFILTER_DEFINE_CLASS(ocv); |
| |
| static const AVFilterPad avfilter_vf_ocv_inputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .filter_frame = filter_frame, |
| }, |
| { NULL } |
| }; |
| |
| static const AVFilterPad avfilter_vf_ocv_outputs[] = { |
| { |
| .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| }, |
| { NULL } |
| }; |
| |
| AVFilter ff_vf_ocv = { |
| .name = "ocv", |
| .description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."), |
| .priv_size = sizeof(OCVContext), |
| .priv_class = &ocv_class, |
| .query_formats = query_formats, |
| .init = init, |
| .uninit = uninit, |
| .inputs = avfilter_vf_ocv_inputs, |
| .outputs = avfilter_vf_ocv_outputs, |
| }; |
