411 lines
13 KiB
C
411 lines
13 KiB
C
/*
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* Copyright (c) 2010 Stefano Sabatini
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* libopencv wrapper functions
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*/
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/* #define DEBUG */
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#include <opencv/cv.h>
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#include <opencv/cxcore.h>
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#include "libavutil/avstring.h"
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#include "libavutil/common.h"
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#include "libavutil/file.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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static void fill_iplimage_from_picref(IplImage *img, const AVFilterBufferRef *picref, enum AVPixelFormat pixfmt)
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{
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IplImage *tmpimg;
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int depth, channels_nb;
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if (pixfmt == AV_PIX_FMT_GRAY8) { depth = IPL_DEPTH_8U; channels_nb = 1; }
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else if (pixfmt == AV_PIX_FMT_BGRA) { depth = IPL_DEPTH_8U; channels_nb = 4; }
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else if (pixfmt == AV_PIX_FMT_BGR24) { depth = IPL_DEPTH_8U; channels_nb = 3; }
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else return;
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tmpimg = cvCreateImageHeader((CvSize){picref->video->w, picref->video->h}, depth, channels_nb);
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*img = *tmpimg;
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img->imageData = img->imageDataOrigin = picref->data[0];
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img->dataOrder = IPL_DATA_ORDER_PIXEL;
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img->origin = IPL_ORIGIN_TL;
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img->widthStep = picref->linesize[0];
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}
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static void fill_picref_from_iplimage(AVFilterBufferRef *picref, const IplImage *img, enum AVPixelFormat pixfmt)
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{
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picref->linesize[0] = img->widthStep;
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picref->data[0] = img->imageData;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE
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};
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
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return 0;
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}
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typedef struct {
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const char *name;
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int (*init)(AVFilterContext *ctx, const char *args);
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void (*uninit)(AVFilterContext *ctx);
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void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
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void *priv;
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} OCVContext;
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typedef struct {
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int type;
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int param1, param2;
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double param3, param4;
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} SmoothContext;
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static av_cold int smooth_init(AVFilterContext *ctx, const char *args)
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{
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OCVContext *ocv = ctx->priv;
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SmoothContext *smooth = ocv->priv;
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char type_str[128] = "gaussian";
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smooth->param1 = 3;
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smooth->param2 = 0;
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smooth->param3 = 0.0;
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smooth->param4 = 0.0;
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if (args)
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sscanf(args, "%127[^:]:%d:%d:%lf:%lf", type_str, &smooth->param1, &smooth->param2, &smooth->param3, &smooth->param4);
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if (!strcmp(type_str, "blur" )) smooth->type = CV_BLUR;
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else if (!strcmp(type_str, "blur_no_scale")) smooth->type = CV_BLUR_NO_SCALE;
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else if (!strcmp(type_str, "median" )) smooth->type = CV_MEDIAN;
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else if (!strcmp(type_str, "gaussian" )) smooth->type = CV_GAUSSIAN;
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else if (!strcmp(type_str, "bilateral" )) smooth->type = CV_BILATERAL;
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else {
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av_log(ctx, AV_LOG_ERROR, "Smoothing type '%s' unknown.\n", type_str);
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return AVERROR(EINVAL);
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}
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if (smooth->param1 < 0 || !(smooth->param1%2)) {
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av_log(ctx, AV_LOG_ERROR,
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"Invalid value '%d' for param1, it has to be a positive odd number\n",
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smooth->param1);
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return AVERROR(EINVAL);
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}
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if ((smooth->type == CV_BLUR || smooth->type == CV_BLUR_NO_SCALE || smooth->type == CV_GAUSSIAN) &&
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(smooth->param2 < 0 || (smooth->param2 && !(smooth->param2%2)))) {
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av_log(ctx, AV_LOG_ERROR,
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"Invalid value '%d' for param2, it has to be zero or a positive odd number\n",
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smooth->param2);
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return AVERROR(EINVAL);
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}
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av_log(ctx, AV_LOG_VERBOSE, "type:%s param1:%d param2:%d param3:%f param4:%f\n",
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type_str, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
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return 0;
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}
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static void smooth_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
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{
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OCVContext *ocv = ctx->priv;
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SmoothContext *smooth = ocv->priv;
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cvSmooth(inimg, outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4);
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}
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static int read_shape_from_file(int *cols, int *rows, int **values, const char *filename,
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void *log_ctx)
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{
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uint8_t *buf, *p, *pend;
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size_t size;
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int ret, i, j, w;
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if ((ret = av_file_map(filename, &buf, &size, 0, log_ctx)) < 0)
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return ret;
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/* prescan file to get the number of lines and the maximum width */
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w = 0;
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for (i = 0; i < size; i++) {
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if (buf[i] == '\n') {
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if (*rows == INT_MAX) {
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av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of rows in the file\n");
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return AVERROR_INVALIDDATA;
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}
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++(*rows);
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*cols = FFMAX(*cols, w);
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w = 0;
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} else if (w == INT_MAX) {
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av_log(log_ctx, AV_LOG_ERROR, "Overflow on the number of columns in the file\n");
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return AVERROR_INVALIDDATA;
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}
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w++;
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}
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if (*rows > (SIZE_MAX / sizeof(int) / *cols)) {
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av_log(log_ctx, AV_LOG_ERROR, "File with size %dx%d is too big\n",
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*rows, *cols);
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return AVERROR_INVALIDDATA;
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}
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if (!(*values = av_mallocz(sizeof(int) * *rows * *cols)))
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return AVERROR(ENOMEM);
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/* fill *values */
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p = buf;
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pend = buf + size-1;
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for (i = 0; i < *rows; i++) {
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for (j = 0;; j++) {
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if (p > pend || *p == '\n') {
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p++;
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break;
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} else
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(*values)[*cols*i + j] = !!av_isgraph(*(p++));
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}
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}
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av_file_unmap(buf, size);
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#ifdef DEBUG
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{
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char *line;
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if (!(line = av_malloc(*cols + 1)))
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return AVERROR(ENOMEM);
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for (i = 0; i < *rows; i++) {
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for (j = 0; j < *cols; j++)
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line[j] = (*values)[i * *cols + j] ? '@' : ' ';
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line[j] = 0;
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av_log(log_ctx, AV_LOG_DEBUG, "%3d: %s\n", i, line);
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}
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av_free(line);
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}
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#endif
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return 0;
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}
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static int parse_iplconvkernel(IplConvKernel **kernel, char *buf, void *log_ctx)
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{
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char shape_filename[128] = "", shape_str[32] = "rect";
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int cols = 0, rows = 0, anchor_x = 0, anchor_y = 0, shape = CV_SHAPE_RECT;
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int *values = NULL, ret;
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sscanf(buf, "%dx%d+%dx%d/%32[^=]=%127s", &cols, &rows, &anchor_x, &anchor_y, shape_str, shape_filename);
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if (!strcmp(shape_str, "rect" )) shape = CV_SHAPE_RECT;
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else if (!strcmp(shape_str, "cross" )) shape = CV_SHAPE_CROSS;
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else if (!strcmp(shape_str, "ellipse")) shape = CV_SHAPE_ELLIPSE;
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else if (!strcmp(shape_str, "custom" )) {
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shape = CV_SHAPE_CUSTOM;
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if ((ret = read_shape_from_file(&cols, &rows, &values, shape_filename, log_ctx)) < 0)
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return ret;
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} else {
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av_log(log_ctx, AV_LOG_ERROR,
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"Shape unspecified or type '%s' unknown.\n", shape_str);
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return AVERROR(EINVAL);
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}
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if (rows <= 0 || cols <= 0) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Invalid non-positive values for shape size %dx%d\n", cols, rows);
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return AVERROR(EINVAL);
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}
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if (anchor_x < 0 || anchor_y < 0 || anchor_x >= cols || anchor_y >= rows) {
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av_log(log_ctx, AV_LOG_ERROR,
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"Shape anchor %dx%d is not inside the rectangle with size %dx%d.\n",
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anchor_x, anchor_y, cols, rows);
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return AVERROR(EINVAL);
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}
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*kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values);
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av_freep(&values);
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if (!*kernel)
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return AVERROR(ENOMEM);
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av_log(log_ctx, AV_LOG_VERBOSE, "Structuring element: w:%d h:%d x:%d y:%d shape:%s\n",
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rows, cols, anchor_x, anchor_y, shape_str);
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return 0;
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}
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typedef struct {
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int nb_iterations;
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IplConvKernel *kernel;
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} DilateContext;
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static av_cold int dilate_init(AVFilterContext *ctx, const char *args)
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{
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OCVContext *ocv = ctx->priv;
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DilateContext *dilate = ocv->priv;
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char default_kernel_str[] = "3x3+0x0/rect";
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char *kernel_str;
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const char *buf = args;
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int ret;
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dilate->nb_iterations = 1;
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if (args)
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kernel_str = av_get_token(&buf, ":");
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if ((ret = parse_iplconvkernel(&dilate->kernel,
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*kernel_str ? kernel_str : default_kernel_str,
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ctx)) < 0)
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return ret;
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av_free(kernel_str);
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sscanf(buf, ":%d", &dilate->nb_iterations);
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av_log(ctx, AV_LOG_VERBOSE, "iterations_nb:%d\n", dilate->nb_iterations);
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if (dilate->nb_iterations <= 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid non-positive value '%d' for nb_iterations\n",
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dilate->nb_iterations);
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return AVERROR(EINVAL);
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}
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return 0;
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}
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static av_cold void dilate_uninit(AVFilterContext *ctx)
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{
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OCVContext *ocv = ctx->priv;
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DilateContext *dilate = ocv->priv;
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cvReleaseStructuringElement(&dilate->kernel);
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}
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static void dilate_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
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{
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OCVContext *ocv = ctx->priv;
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DilateContext *dilate = ocv->priv;
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cvDilate(inimg, outimg, dilate->kernel, dilate->nb_iterations);
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}
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static void erode_end_frame_filter(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg)
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{
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OCVContext *ocv = ctx->priv;
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DilateContext *dilate = ocv->priv;
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cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations);
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}
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typedef struct {
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const char *name;
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size_t priv_size;
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int (*init)(AVFilterContext *ctx, const char *args);
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void (*uninit)(AVFilterContext *ctx);
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void (*end_frame_filter)(AVFilterContext *ctx, IplImage *inimg, IplImage *outimg);
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} OCVFilterEntry;
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static OCVFilterEntry ocv_filter_entries[] = {
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{ "dilate", sizeof(DilateContext), dilate_init, dilate_uninit, dilate_end_frame_filter },
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{ "erode", sizeof(DilateContext), dilate_init, dilate_uninit, erode_end_frame_filter },
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{ "smooth", sizeof(SmoothContext), smooth_init, NULL, smooth_end_frame_filter },
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};
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static av_cold int init(AVFilterContext *ctx, const char *args)
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{
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OCVContext *ocv = ctx->priv;
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char name[128], priv_args[1024];
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int i;
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char c;
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sscanf(args, "%127[^=:]%c%1023s", name, &c, priv_args);
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for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) {
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OCVFilterEntry *entry = &ocv_filter_entries[i];
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if (!strcmp(name, entry->name)) {
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ocv->name = entry->name;
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ocv->init = entry->init;
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ocv->uninit = entry->uninit;
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ocv->end_frame_filter = entry->end_frame_filter;
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if (!(ocv->priv = av_mallocz(entry->priv_size)))
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return AVERROR(ENOMEM);
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return ocv->init(ctx, priv_args);
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}
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}
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av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", name);
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return AVERROR(EINVAL);
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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OCVContext *ocv = ctx->priv;
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if (ocv->uninit)
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ocv->uninit(ctx);
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av_free(ocv->priv);
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memset(ocv, 0, sizeof(*ocv));
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}
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static int filter_frame(AVFilterLink *inlink, AVFilterBufferRef *in)
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{
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AVFilterContext *ctx = inlink->dst;
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OCVContext *ocv = ctx->priv;
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AVFilterLink *outlink= inlink->dst->outputs[0];
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AVFilterBufferRef *out;
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IplImage inimg, outimg;
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out = ff_get_video_buffer(outlink, AV_PERM_WRITE, outlink->w, outlink->h);
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if (!out) {
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avfilter_unref_bufferp(&in);
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return AVERROR(ENOMEM);
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}
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avfilter_copy_buffer_ref_props(out, in);
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fill_iplimage_from_picref(&inimg , in , inlink->format);
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fill_iplimage_from_picref(&outimg, out, inlink->format);
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ocv->end_frame_filter(ctx, &inimg, &outimg);
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fill_picref_from_iplimage(out, &outimg, inlink->format);
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avfilter_unref_bufferp(&in);
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return ff_filter_frame(outlink, out);
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}
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static const AVFilterPad avfilter_vf_ocv_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.filter_frame = filter_frame,
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.min_perms = AV_PERM_READ
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},
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{ NULL }
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};
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static const AVFilterPad avfilter_vf_ocv_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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},
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{ NULL }
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};
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AVFilter avfilter_vf_ocv = {
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.name = "ocv",
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.description = NULL_IF_CONFIG_SMALL("Apply transform using libopencv."),
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.priv_size = sizeof(OCVContext),
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.query_formats = query_formats,
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.init = init,
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.uninit = uninit,
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.inputs = avfilter_vf_ocv_inputs,
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.outputs = avfilter_vf_ocv_outputs,
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};
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