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Stefano Sabatini
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Sep 14, 2010
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| /* | ||
| * copyright Stefano Sabatini 2010 | ||
| * | ||
| * 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 | ||
| */ | ||
|
|
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| #include "opencv/cv.h" | ||
| #include "opencv/cxtypes.h" | ||
| #include "avfilter.h" | ||
|
|
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| static void fill_iplimage_from_picref(IplImage *img, const AVFilterBufferRef *picref, enum PixelFormat pixfmt) | ||
| { | ||
| IplImage *tmpimg; | ||
| int depth, channels_nb; | ||
|
|
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| if (pixfmt == PIX_FMT_GRAY8) { depth = IPL_DEPTH_8U; channels_nb = 1; } | ||
| else if (pixfmt == PIX_FMT_BGRA) { depth = IPL_DEPTH_8U; channels_nb = 4; } | ||
| else if (pixfmt == PIX_FMT_BGR24) { depth = IPL_DEPTH_8U; channels_nb = 3; } | ||
| else return; | ||
|
|
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| tmpimg = cvCreateImageHeader((CvSize){picref->video->w, picref->video->h}, depth, channels_nb); | ||
| *img = *tmpimg; | ||
| img->imageData = img->imageDataOrigin = picref->data[0]; | ||
| img->dataOrder = IPL_DATA_ORDER_PIXEL; | ||
| img->origin = IPL_ORIGIN_TL; | ||
| img->widthStep = picref->linesize[0]; | ||
| } | ||
|
|
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| static void fill_picref_from_iplimage(AVFilterBufferRef *picref, const IplImage *img, enum PixelFormat pixfmt) | ||
| { | ||
| picref->linesize[0] = img->widthStep; | ||
| picref->data[0] = img->imageData; | ||
| } | ||
|
|
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| static int query_formats(AVFilterContext *ctx) | ||
| { | ||
| static const enum PixelFormat pix_fmts[] = { | ||
| PIX_FMT_BGR24, PIX_FMT_BGRA, PIX_FMT_GRAY8, PIX_FMT_NONE | ||
| }; | ||
|
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| avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts)); | ||
| return 0; | ||
| } | ||
|
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| static void null_draw_slice(AVFilterLink *link, int y, int h, int slice_dir) { } | ||
|
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| #if CONFIG_OCV_SMOOTH_FILTER | ||
|
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| typedef struct { | ||
| int type; | ||
| int param1, param2; | ||
| double param3, param4; | ||
| } SmoothContext; | ||
|
|
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| static av_cold int smooth_init(AVFilterContext *ctx, const char *args, void *opaque) | ||
| { | ||
| SmoothContext *smooth = ctx->priv; | ||
| char type_str[128] = "gaussian"; | ||
|
|
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| smooth->param1 = 3; | ||
| smooth->param2 = 0; | ||
| smooth->param3 = 0.0; | ||
| smooth->param4 = 0.0; | ||
|
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| if (args) | ||
| 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; | ||
| 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); | ||
| } | ||
|
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| 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); | ||
| } | ||
|
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| av_log(ctx, AV_LOG_INFO, "type:%s param1:%d param2:%d param3:%f param4:%f\n", | ||
| type_str, smooth->param1, smooth->param2, smooth->param3, smooth->param4); | ||
| return 0; | ||
| } | ||
|
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| static void smooth_end_frame(AVFilterLink *inlink) | ||
| { | ||
| SmoothContext *smooth = inlink->dst->priv; | ||
| AVFilterLink *outlink= inlink->dst->outputs[0]; | ||
| AVFilterBufferRef *inpicref = inlink ->cur_buf; | ||
| AVFilterBufferRef *outpicref = outlink->out_buf; | ||
| IplImage inimg, outimg; | ||
|
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| fill_iplimage_from_picref(&inimg , inpicref , inlink->format); | ||
| fill_iplimage_from_picref(&outimg, outpicref, inlink->format); | ||
| cvSmooth(&inimg, &outimg, smooth->type, smooth->param1, smooth->param2, smooth->param3, smooth->param4); | ||
| fill_picref_from_iplimage(outpicref, &outimg, inlink->format); | ||
|
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| avfilter_unref_buffer(inpicref); | ||
| avfilter_draw_slice(outlink, 0, outlink->h, 1); | ||
| avfilter_end_frame(outlink); | ||
| avfilter_unref_buffer(outpicref); | ||
| } | ||
|
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| AVFilter avfilter_vf_ocv_smooth = { | ||
| .name = "ocv_smooth", | ||
| .description = "Apply smooth transform using libopencv.", | ||
|
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| .priv_size = sizeof(SmoothContext), | ||
|
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| .query_formats = query_formats, | ||
| .init = smooth_init, | ||
|
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| .inputs = (AVFilterPad[]) {{ .name = "default", | ||
| .type = AVMEDIA_TYPE_VIDEO, | ||
| .draw_slice = null_draw_slice, | ||
| .end_frame = smooth_end_frame, | ||
| .min_perms = AV_PERM_READ }, | ||
| { .name = NULL}}, | ||
|
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| .outputs = (AVFilterPad[]) {{ .name = "default", | ||
| .type = AVMEDIA_TYPE_VIDEO, }, | ||
| { .name = NULL}}, | ||
| }; | ||
|
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| #endif /* CONFIG_OCV_SMOOTH_FILTER */ |