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428 lines
13 KiB
428 lines
13 KiB
/* |
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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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#include "config.h" |
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#if HAVE_OPENCV2_CORE_CORE_C_H |
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#include <opencv2/core/core_c.h> |
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#include <opencv2/imgproc/imgproc_c.h> |
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#else |
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#include <opencv/cv.h> |
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#include <opencv/cxcore.h> |
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#endif |
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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 "libavutil/mem.h" |
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#include "libavutil/opt.h" |
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#include "avfilter.h" |
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#include "filters.h" |
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#include "formats.h" |
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#include "video.h" |
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static void fill_iplimage_from_frame(IplImage *img, const AVFrame *frame, 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){frame->width, frame->height}, depth, channels_nb); |
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*img = *tmpimg; |
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img->imageData = img->imageDataOrigin = frame->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 = frame->linesize[0]; |
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} |
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static void fill_frame_from_iplimage(AVFrame *frame, const IplImage *img, enum AVPixelFormat pixfmt) |
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{ |
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frame->linesize[0] = img->widthStep; |
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frame->data[0] = img->imageData; |
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} |
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typedef struct OCVContext { |
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const AVClass *class; |
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char *name; |
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char *params; |
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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 SmoothContext { |
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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 *s = ctx->priv; |
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SmoothContext *smooth = s->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 *s = ctx->priv; |
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SmoothContext *smooth = s->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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ret = AVERROR_INVALIDDATA; |
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goto end; |
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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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ret = AVERROR_INVALIDDATA; |
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goto end; |
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} |
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if (!(*values = av_calloc(sizeof(int) * *rows, *cols))) { |
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ret = AVERROR(ENOMEM); |
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goto end; |
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} |
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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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end: |
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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 = 0; |
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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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ret = AVERROR(EINVAL); |
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goto out; |
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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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ret = AVERROR(EINVAL); |
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goto out; |
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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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ret = AVERROR(EINVAL); |
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goto out; |
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} |
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*kernel = cvCreateStructuringElementEx(cols, rows, anchor_x, anchor_y, shape, values); |
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if (!*kernel) { |
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ret = AVERROR(ENOMEM); |
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goto out; |
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} |
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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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out: |
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av_freep(&values); |
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return ret; |
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} |
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typedef struct DilateContext { |
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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 *s = ctx->priv; |
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DilateContext *dilate = s->priv; |
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char default_kernel_str[] = "3x3+0x0/rect"; |
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char *kernel_str = NULL; |
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const char *buf = args; |
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int ret; |
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if (args) { |
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kernel_str = av_get_token(&buf, "|"); |
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if (!kernel_str) |
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return AVERROR(ENOMEM); |
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} |
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ret = parse_iplconvkernel(&dilate->kernel, |
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(!kernel_str || !*kernel_str) ? default_kernel_str |
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: kernel_str, |
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ctx); |
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av_free(kernel_str); |
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if (ret < 0) |
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return ret; |
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if (!buf || sscanf(buf, "|%d", &dilate->nb_iterations) != 1) |
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dilate->nb_iterations = 1; |
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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 *s = ctx->priv; |
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DilateContext *dilate = s->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 *s = ctx->priv; |
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DilateContext *dilate = s->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 *s = ctx->priv; |
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DilateContext *dilate = s->priv; |
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cvErode(inimg, outimg, dilate->kernel, dilate->nb_iterations); |
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} |
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typedef struct OCVFilterEntry { |
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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 const 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) |
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{ |
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OCVContext *s = ctx->priv; |
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int i; |
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if (!s->name) { |
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av_log(ctx, AV_LOG_ERROR, "No libopencv filter name specified\n"); |
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return AVERROR(EINVAL); |
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} |
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for (i = 0; i < FF_ARRAY_ELEMS(ocv_filter_entries); i++) { |
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const OCVFilterEntry *entry = &ocv_filter_entries[i]; |
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if (!strcmp(s->name, entry->name)) { |
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s->init = entry->init; |
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s->uninit = entry->uninit; |
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s->end_frame_filter = entry->end_frame_filter; |
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if (!(s->priv = av_mallocz(entry->priv_size))) |
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return AVERROR(ENOMEM); |
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return s->init(ctx, s->params); |
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} |
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} |
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av_log(ctx, AV_LOG_ERROR, "No libopencv filter named '%s'\n", s->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 *s = ctx->priv; |
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if (s->uninit) |
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s->uninit(ctx); |
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av_freep(&s->priv); |
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} |
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static int filter_frame(AVFilterLink *inlink, AVFrame *in) |
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{ |
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AVFilterContext *ctx = inlink->dst; |
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OCVContext *s = ctx->priv; |
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AVFilterLink *outlink= inlink->dst->outputs[0]; |
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AVFrame *out; |
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IplImage inimg, outimg; |
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out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!out) { |
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av_frame_free(&in); |
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return AVERROR(ENOMEM); |
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} |
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av_frame_copy_props(out, in); |
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fill_iplimage_from_frame(&inimg , in , inlink->format); |
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fill_iplimage_from_frame(&outimg, out, inlink->format); |
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s->end_frame_filter(ctx, &inimg, &outimg); |
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fill_frame_from_iplimage(out, &outimg, inlink->format); |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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} |
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#define OFFSET(x) offsetof(OCVContext, x) |
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM |
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static const AVOption ocv_options[] = { |
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{ "filter_name", NULL, OFFSET(name), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
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{ "filter_params", NULL, OFFSET(params), AV_OPT_TYPE_STRING, .flags = FLAGS }, |
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{ NULL } |
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}; |
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AVFILTER_DEFINE_CLASS(ocv); |
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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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}, |
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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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}; |
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const AVFilter ff_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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.priv_class = &ocv_class, |
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.init = init, |
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.uninit = uninit, |
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FILTER_INPUTS(avfilter_vf_ocv_inputs), |
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FILTER_OUTPUTS(avfilter_vf_ocv_outputs), |
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FILTER_PIXFMTS(AV_PIX_FMT_BGR24, AV_PIX_FMT_BGRA, AV_PIX_FMT_GRAY8), |
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};
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