mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
5 years ago
parent
5161b279d6
commit
a746359ede
6 changed files with 222 additions and 1 deletions
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/*
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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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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 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_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_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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AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); |
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if (!fmts_list) |
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return AVERROR(ENOMEM); |
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return ff_set_common_formats(ctx, fmts_list); |
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} |
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static void scroll(ScrollContext *s, AVFrame *in, AVFrame *out) |
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{ |
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int h_pos, v_pos; |
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int pos_h[4], pos_v[4]; |
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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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pos_v[1] = pos_v[2] = AV_CEIL_RSHIFT(v_pos, s->desc->log2_chroma_h); |
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pos_v[0] = pos_v[3] = v_pos; |
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pos_h[1] = pos_h[2] = AV_CEIL_RSHIFT(h_pos, s->desc->log2_chroma_w) * s->bytes; |
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pos_h[0] = pos_h[3] = h_pos * s->bytes; |
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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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uint8_t *dst = out->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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for (int y = 0; y < h; y++) { |
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int yy = (y + pos_v[p]) % h; |
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const uint8_t *ssrc = src + yy * in->linesize[p]; |
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if (pos_h[p] < w) |
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memcpy(dst, ssrc + pos_h[p], w - pos_h[p]); |
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if (pos_h[p] > 0) |
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memcpy(dst + w - pos_h[p], ssrc, pos_h[p]); |
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dst += out->linesize[p]; |
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} |
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} |
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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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ScrollContext *s = ctx->priv; |
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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(s, 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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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., FLAGS }, |
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{ "h", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, |
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{ "vertical", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, |
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{ "v", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, |
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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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{ NULL } |
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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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{ NULL } |
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}; |
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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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.query_formats = query_formats, |
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.inputs = scroll_inputs, |
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.outputs = scroll_outputs, |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, |
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}; |
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