mirror of
https://github.com/FFmpeg/FFmpeg.git
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215 lines
7.4 KiB
C
215 lines
7.4 KiB
C
/*
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* Copyright (c) 2019 Paul B Mahol
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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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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.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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typedef struct ScrollContext {
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const AVClass *class;
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float h_speed, v_speed;
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float h_pos, v_pos;
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float h_ipos, v_ipos;
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int pos_h[4], pos_v[4];
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const AVPixFmtDescriptor *desc;
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int nb_planes;
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int bytes;
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int planewidth[4];
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int planeheight[4];
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} ScrollContext;
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static const enum AVPixelFormat pix_fmts[] = {
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AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P,
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AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P,
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AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9,
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AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10,
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AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12,
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AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14,
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AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16,
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AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9,
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AV_PIX_FMT_YUVA422P12, AV_PIX_FMT_YUVA444P12,
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AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10,
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AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16,
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10,
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16,
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16,
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16,
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AV_PIX_FMT_NONE
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};
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typedef struct ThreadData {
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AVFrame *in, *out;
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} ThreadData;
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static int scroll_slice(AVFilterContext *ctx, void *arg, int jobnr,
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int nb_jobs)
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{
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ScrollContext *s = ctx->priv;
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ThreadData *td = arg;
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AVFrame *in = td->in;
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AVFrame *out = td->out;
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for (int p = 0; p < s->nb_planes; p++) {
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const uint8_t *src = in->data[p];
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const int h = s->planeheight[p];
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const int w = s->planewidth[p] * s->bytes;
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const int slice_start = (h * jobnr) / nb_jobs;
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const int slice_end = (h * (jobnr+1)) / nb_jobs;
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uint8_t *dst = out->data[p] + slice_start * out->linesize[p];
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for (int y = slice_start; y < slice_end; y++) {
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int yy = (y + s->pos_v[p]) % h;
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const uint8_t *ssrc = src + yy * in->linesize[p];
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if (s->pos_h[p] < w)
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memcpy(dst, ssrc + s->pos_h[p], w - s->pos_h[p]);
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if (s->pos_h[p] > 0)
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memcpy(dst + w - s->pos_h[p], ssrc, s->pos_h[p]);
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dst += out->linesize[p];
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}
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}
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return 0;
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}
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static void scroll(AVFilterContext *ctx, AVFrame *in, AVFrame *out)
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{
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ScrollContext *s = ctx->priv;
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ThreadData td;
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int h_pos, v_pos;
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s->h_pos = fmodf(s->h_pos, in->width);
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s->v_pos = fmodf(s->v_pos, in->height);
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h_pos = s->h_pos;
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v_pos = s->v_pos;
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if (h_pos < 0)
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h_pos += in->width;
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if (v_pos < 0)
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v_pos += in->height;
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s->pos_v[1] = s->pos_v[2] = AV_CEIL_RSHIFT(v_pos, s->desc->log2_chroma_h);
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s->pos_v[0] = s->pos_v[3] = v_pos;
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s->pos_h[1] = s->pos_h[2] = AV_CEIL_RSHIFT(h_pos, s->desc->log2_chroma_w) * s->bytes;
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s->pos_h[0] = s->pos_h[3] = h_pos * s->bytes;
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td.in = in; td.out = out;
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ff_filter_execute(ctx, scroll_slice, &td, NULL,
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FFMIN(out->height, ff_filter_get_nb_threads(ctx)));
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s->h_pos += s->h_speed * in->width;
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s->v_pos += s->v_speed * in->height;
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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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AVFilterLink *outlink = ctx->outputs[0];
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AVFrame *out;
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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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scroll(ctx, in, out);
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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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static int config_input(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ScrollContext *s = ctx->priv;
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s->desc = av_pix_fmt_desc_get(inlink->format);
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s->nb_planes = s->desc->nb_components;
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s->bytes = (s->desc->comp[0].depth + 7) >> 3;
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h);
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s->planeheight[0] = s->planeheight[3] = inlink->h;
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w);
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s->planewidth[0] = s->planewidth[3] = inlink->w;
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s->h_pos = (1.f - s->h_ipos) * inlink->w;
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s->v_pos = (1.f - s->v_ipos) * inlink->h;
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return 0;
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}
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#define OFFSET(x) offsetof(ScrollContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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#define VFT AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
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static const AVOption scroll_options[] = {
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{ "horizontal", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
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{ "h", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
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{ "vertical", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
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{ "v", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., VFT },
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{ "hpos", "set initial horizontal position", OFFSET(h_ipos), AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS },
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{ "vpos", "set initial vertical position", OFFSET(v_ipos), AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(scroll);
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static const AVFilterPad scroll_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_input,
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.filter_frame = filter_frame,
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},
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};
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static const AVFilterPad scroll_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_scroll = {
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.name = "scroll",
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.description = NULL_IF_CONFIG_SMALL("Scroll input video."),
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.priv_size = sizeof(ScrollContext),
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.priv_class = &scroll_class,
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FILTER_INPUTS(scroll_inputs),
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FILTER_OUTPUTS(scroll_outputs),
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FILTER_PIXFMTS_ARRAY(pix_fmts),
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = ff_filter_process_command,
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};
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