/* * Copyright (c) 2015 Paul B. Mahol * * 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 */ #include "libavutil/avassert.h" #include "libavutil/eval.h" #include "libavutil/imgutils.h" #include "libavutil/mem.h" #include "libavutil/opt.h" #include "avfilter.h" #include "filters.h" #include "formats.h" #include "video.h" typedef struct SwapRectContext { const AVClass *class; char *w, *h; char *x1, *y1; char *x2, *y2; int nb_planes; int pixsteps[4]; const AVPixFmtDescriptor *desc; uint8_t *temp; } SwapRectContext; #define OFFSET(x) offsetof(SwapRectContext, x) #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM static const AVOption swaprect_options[] = { { "w", "set rect width", OFFSET(w), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS }, { "h", "set rect height", OFFSET(h), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS }, { "x1", "set 1st rect x top left coordinate", OFFSET(x1), AV_OPT_TYPE_STRING, {.str="w/2"}, 0, 0, .flags = FLAGS }, { "y1", "set 1st rect y top left coordinate", OFFSET(y1), AV_OPT_TYPE_STRING, {.str="h/2"}, 0, 0, .flags = FLAGS }, { "x2", "set 2nd rect x top left coordinate", OFFSET(x2), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, .flags = FLAGS }, { "y2", "set 2nd rect y top left coordinate", OFFSET(y2), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, .flags = FLAGS }, { NULL }, }; AVFILTER_DEFINE_CLASS(swaprect); static int query_formats(const AVFilterContext *ctx, AVFilterFormatsConfig **cfg_in, AVFilterFormatsConfig **cfg_out) { int reject_flags = AV_PIX_FMT_FLAG_PAL | AV_PIX_FMT_FLAG_HWACCEL | AV_PIX_FMT_FLAG_BITSTREAM; return ff_set_common_formats2(ctx, cfg_in, cfg_out, ff_formats_pixdesc_filter(0, reject_flags)); } static const char *const var_names[] = { "w", "h", "a", "n", "t", #if FF_API_FRAME_PKT "pos", #endif "sar", "dar", NULL }; enum { VAR_W, VAR_H, VAR_A, VAR_N, VAR_T, #if FF_API_FRAME_PKT VAR_POS, #endif VAR_SAR, VAR_DAR, VAR_VARS_NB }; static int filter_frame(AVFilterLink *inlink, AVFrame *in) { FilterLink *inl = ff_filter_link(inlink); AVFilterContext *ctx = inlink->dst; AVFilterLink *outlink = ctx->outputs[0]; SwapRectContext *s = ctx->priv; double var_values[VAR_VARS_NB]; int x1[4], y1[4]; int x2[4], y2[4]; int aw[4], ah[4]; int lw[4], lh[4]; int pw[4], ph[4]; double dw, dh; double dx1, dy1; double dx2, dy2; int y, p, w, h, ret; var_values[VAR_W] = inlink->w; var_values[VAR_H] = inlink->h; var_values[VAR_A] = (float) inlink->w / inlink->h; var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? av_q2d(inlink->sample_aspect_ratio) : 1; var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR]; var_values[VAR_N] = inl->frame_count_out; var_values[VAR_T] = in->pts == AV_NOPTS_VALUE ? NAN : in->pts * av_q2d(inlink->time_base); #if FF_API_FRAME_PKT FF_DISABLE_DEPRECATION_WARNINGS var_values[VAR_POS] = in->pkt_pos == -1 ? NAN : in->pkt_pos; FF_ENABLE_DEPRECATION_WARNINGS #endif ret = av_expr_parse_and_eval(&dw, s->w, var_names, &var_values[0], NULL, NULL, NULL, NULL, 0, 0, ctx); if (ret < 0) return ret; ret = av_expr_parse_and_eval(&dh, s->h, var_names, &var_values[0], NULL, NULL, NULL, NULL, 0, 0, ctx); if (ret < 0) return ret; ret = av_expr_parse_and_eval(&dx1, s->x1, var_names, &var_values[0], NULL, NULL, NULL, NULL, 0, 0, ctx); if (ret < 0) return ret; ret = av_expr_parse_and_eval(&dy1, s->y1, var_names, &var_values[0], NULL, NULL, NULL, NULL, 0, 0, ctx); if (ret < 0) return ret; ret = av_expr_parse_and_eval(&dx2, s->x2, var_names, &var_values[0], NULL, NULL, NULL, NULL, 0, 0, ctx); if (ret < 0) return ret; ret = av_expr_parse_and_eval(&dy2, s->y2, var_names, &var_values[0], NULL, NULL, NULL, NULL, 0, 0, ctx); if (ret < 0) return ret; w = dw; h = dh; x1[0] = dx1; y1[0] = dy1; x2[0] = dx2; y2[0] = dy2; x1[0] = av_clip(x1[0], 0, inlink->w - 1); y1[0] = av_clip(y1[0], 0, inlink->h - 1); x2[0] = av_clip(x2[0], 0, inlink->w - 1); y2[0] = av_clip(y2[0], 0, inlink->h - 1); ah[1] = ah[2] = AV_CEIL_RSHIFT(h, s->desc->log2_chroma_h); ah[0] = ah[3] = h; aw[1] = aw[2] = AV_CEIL_RSHIFT(w, s->desc->log2_chroma_w); aw[0] = aw[3] = w; w = FFMIN3(w, inlink->w - x1[0], inlink->w - x2[0]); h = FFMIN3(h, inlink->h - y1[0], inlink->h - y2[0]); ph[1] = ph[2] = AV_CEIL_RSHIFT(h, s->desc->log2_chroma_h); ph[0] = ph[3] = h; pw[1] = pw[2] = AV_CEIL_RSHIFT(w, s->desc->log2_chroma_w); pw[0] = pw[3] = w; lh[1] = lh[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); lh[0] = lh[3] = inlink->h; lw[1] = lw[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w); lw[0] = lw[3] = inlink->w; x1[1] = x1[2] = (x1[0] >> s->desc->log2_chroma_w); x1[0] = x1[3] = x1[0]; y1[1] = y1[2] = (y1[0] >> s->desc->log2_chroma_h); y1[0] = y1[3] = y1[0]; x2[1] = x2[2] = (x2[0] >> s->desc->log2_chroma_w); x2[0] = x2[3] = x2[0]; y2[1] = y2[2] = (y2[0] >> s->desc->log2_chroma_h); y2[0] = y2[3] = y2[0]; av_assert0(FFMAX(x1[1], x2[1]) + pw[1] <= lw[1]); av_assert0(FFMAX(y1[1], y2[1]) + ph[1] <= lh[1]); for (p = 0; p < s->nb_planes; p++) { if (ph[p] == ah[p] && pw[p] == aw[p]) { uint8_t *src = in->data[p] + y1[p] * in->linesize[p] + x1[p] * s->pixsteps[p]; uint8_t *dst = in->data[p] + y2[p] * in->linesize[p] + x2[p] * s->pixsteps[p]; for (y = 0; y < ph[p]; y++) { memcpy(s->temp, src, pw[p] * s->pixsteps[p]); memmove(src, dst, pw[p] * s->pixsteps[p]); memcpy(dst, s->temp, pw[p] * s->pixsteps[p]); src += in->linesize[p]; dst += in->linesize[p]; } } } return ff_filter_frame(outlink, in); } static int config_input(AVFilterLink *inlink) { AVFilterContext *ctx = inlink->dst; SwapRectContext *s = ctx->priv; if (!s->w || !s->h || !s->x1 || !s->y1 || !s->x2 || !s->y2) return AVERROR(EINVAL); s->desc = av_pix_fmt_desc_get(inlink->format); av_image_fill_max_pixsteps(s->pixsteps, NULL, s->desc); s->nb_planes = av_pix_fmt_count_planes(inlink->format); s->temp = av_malloc_array(inlink->w, s->pixsteps[0]); if (!s->temp) return AVERROR(ENOMEM); return 0; } static av_cold void uninit(AVFilterContext *ctx) { SwapRectContext *s = ctx->priv; av_freep(&s->temp); } static const AVFilterPad inputs[] = { { .name = "default", .type = AVMEDIA_TYPE_VIDEO, .flags = AVFILTERPAD_FLAG_NEEDS_WRITABLE, .filter_frame = filter_frame, .config_props = config_input, }, }; const AVFilter ff_vf_swaprect = { .name = "swaprect", .description = NULL_IF_CONFIG_SMALL("Swap 2 rectangular objects in video."), .priv_size = sizeof(SwapRectContext), .priv_class = &swaprect_class, .uninit = uninit, FILTER_INPUTS(inputs), FILTER_OUTPUTS(ff_video_default_filterpad), FILTER_QUERY_FUNC2(query_formats), .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, .process_command = ff_filter_process_command, };