Message ID | 20190929125625.30153-1-onemda@gmail.com |
---|---|
State | New |
Headers | show |
will apply. On 9/29/19, Paul B Mahol <onemda@gmail.com> wrote: > Signed-off-by: Paul B Mahol <onemda@gmail.com> > --- > doc/filters.texi | 20 ++++ > libavfilter/Makefile | 1 + > libavfilter/allfilters.c | 1 + > libavfilter/vf_scroll.c | 200 +++++++++++++++++++++++++++++++++++++++ > 4 files changed, 222 insertions(+) > create mode 100644 libavfilter/vf_scroll.c > > diff --git a/doc/filters.texi b/doc/filters.texi > index 333f502083..416bb327c1 100644 > --- a/doc/filters.texi > +++ b/doc/filters.texi > @@ -15650,6 +15650,26 @@ Scale a logo to 1/10th the height of a video, while > preserving its display aspec > @end example > @end itemize > > +@section scroll > +Scroll input video horizontally and/or vertically by constant speed. > + > +The filter accepts the following options: > +@table @option > +@item horizontal, h > +Set the horizontal scrolling speed. Default is 0. Allowed range is from -1 > to 1. > +Negative values changes scrolling direction. > + > +@item vertical, v > +Set the vertical scrolling speed. Default is 0. Allowed range is from -1 to > 1. > +Negative values changes scrolling direction. > + > +@item hpos > +Set the initial horizontal scrolling position. Default is 0. Allowed range > is from 0 to 1. > + > +@item vpos > +Set the initial vertical scrolling position. Default is 0. Allowed range is > from 0 to 1. > +@end table > + > @anchor{selectivecolor} > @section selectivecolor > > diff --git a/libavfilter/Makefile b/libavfilter/Makefile > index b99ecc8c26..124a3496e6 100644 > --- a/libavfilter/Makefile > +++ b/libavfilter/Makefile > @@ -356,6 +356,7 @@ OBJS-$(CONFIG_SCALE_NPP_FILTER) += > vf_scale_npp.o scale.o > OBJS-$(CONFIG_SCALE_QSV_FILTER) += vf_scale_qsv.o > OBJS-$(CONFIG_SCALE_VAAPI_FILTER) += vf_scale_vaapi.o scale.o > vaapi_vpp.o > OBJS-$(CONFIG_SCALE2REF_FILTER) += vf_scale.o scale.o > +OBJS-$(CONFIG_SCROLL_FILTER) += vf_scroll.o > OBJS-$(CONFIG_SELECT_FILTER) += f_select.o > OBJS-$(CONFIG_SELECTIVECOLOR_FILTER) += vf_selectivecolor.o > OBJS-$(CONFIG_SENDCMD_FILTER) += f_sendcmd.o > diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c > index 788652ab1e..0408bcd3df 100644 > --- a/libavfilter/allfilters.c > +++ b/libavfilter/allfilters.c > @@ -338,6 +338,7 @@ extern AVFilter ff_vf_scale_npp; > extern AVFilter ff_vf_scale_qsv; > extern AVFilter ff_vf_scale_vaapi; > extern AVFilter ff_vf_scale2ref; > +extern AVFilter ff_vf_scroll; > extern AVFilter ff_vf_select; > extern AVFilter ff_vf_selectivecolor; > extern AVFilter ff_vf_sendcmd; > diff --git a/libavfilter/vf_scroll.c b/libavfilter/vf_scroll.c > new file mode 100644 > index 0000000000..36db39f2ac > --- /dev/null > +++ b/libavfilter/vf_scroll.c > @@ -0,0 +1,200 @@ > +/* > + * Copyright (c) 2019 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/colorspace.h" > +#include "libavutil/common.h" > +#include "libavutil/opt.h" > +#include "libavutil/pixdesc.h" > +#include "avfilter.h" > +#include "drawutils.h" > +#include "formats.h" > +#include "internal.h" > +#include "video.h" > + > +typedef struct ScrollContext { > + const AVClass *class; > + > + float h_speed, v_speed; > + float h_pos, v_pos; > + float h_ipos, v_ipos; > + > + const AVPixFmtDescriptor *desc; > + int nb_planes; > + int bytes; > + > + int planewidth[4]; > + int planeheight[4]; > +} ScrollContext; > + > +static int query_formats(AVFilterContext *ctx) > +{ > + static const enum AVPixelFormat pix_fmts[] = { > + AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, > + AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, > + AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, > AV_PIX_FMT_YUV420P, > + AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, > + AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, > + AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, > + AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, > + AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, > AV_PIX_FMT_YUV440P12, > + AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, > + AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, > + AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, > + AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, > AV_PIX_FMT_YUVA444P10, > + AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, > AV_PIX_FMT_YUVA444P16, > + AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, > + AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, > + AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, > AV_PIX_FMT_GBRAP16, > + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, > AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, > + AV_PIX_FMT_NONE > + }; > + > + AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); > + if (!fmts_list) > + return AVERROR(ENOMEM); > + return ff_set_common_formats(ctx, fmts_list); > +} > + > +static void scroll(ScrollContext *s, AVFrame *in, AVFrame *out) > +{ > + int h_pos, v_pos; > + int pos_h[4], pos_v[4]; > + > + s->h_pos += s->h_speed * in->width; > + s->v_pos += s->v_speed * in->height; > + > + s->h_pos = fmodf(s->h_pos, in->width); > + s->v_pos = fmodf(s->v_pos, in->height); > + > + h_pos = s->h_pos; > + v_pos = s->v_pos; > + > + if (h_pos < 0) > + h_pos += in->width; > + if (v_pos < 0) > + v_pos += in->height; > + > + pos_v[1] = pos_v[2] = AV_CEIL_RSHIFT(v_pos, s->desc->log2_chroma_h); > + pos_v[0] = pos_v[3] = v_pos; > + pos_h[1] = pos_h[2] = AV_CEIL_RSHIFT(h_pos, s->desc->log2_chroma_w) * > s->bytes; > + pos_h[0] = pos_h[3] = h_pos * s->bytes; > + > + for (int p = 0; p < s->nb_planes; p++) { > + const uint8_t *src = in->data[p]; > + uint8_t *dst = out->data[p]; > + const int h = s->planeheight[p]; > + const int w = s->planewidth[p] * s->bytes; > + > + for (int y = 0; y < h; y++) { > + int yy = (y + pos_v[p]) % h; > + const uint8_t *ssrc = src + yy * in->linesize[p]; > + > + memcpy(dst, ssrc + pos_h[p], w - pos_h[p]); > + if (pos_h[p]) > + memcpy(dst + w - pos_h[p], ssrc, pos_h[p]); > + > + dst += out->linesize[p]; > + } > + } > +} > + > +static int filter_frame(AVFilterLink *inlink, AVFrame *in) > +{ > + AVFilterContext *ctx = inlink->dst; > + ScrollContext *s = ctx->priv; > + AVFilterLink *outlink = ctx->outputs[0]; > + AVFrame *out; > + > + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); > + if (!out) { > + av_frame_free(&in); > + return AVERROR(ENOMEM); > + } > + av_frame_copy_props(out, in); > + > + scroll(s, in, out); > + > + av_frame_free(&in); > + return ff_filter_frame(outlink, out); > +} > + > +static int config_input(AVFilterLink *inlink) > +{ > + AVFilterContext *ctx = inlink->dst; > + ScrollContext *s = ctx->priv; > + > + s->desc = av_pix_fmt_desc_get(inlink->format); > + s->nb_planes = s->desc->nb_components; > + s->bytes = (s->desc->comp[0].depth + 7) >> 3; > + > + s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, > s->desc->log2_chroma_h); > + s->planeheight[0] = s->planeheight[3] = inlink->h; > + s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, > s->desc->log2_chroma_w); > + s->planewidth[0] = s->planewidth[3] = inlink->w; > + > + s->h_pos += s->h_ipos * inlink->w; > + s->v_pos += s->v_ipos * inlink->h; > + > + return 0; > +} > + > +#define OFFSET(x) offsetof(ScrollContext, x) > +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM > + > +static const AVOption scroll_options[] = { > + { "horizontal", "set the horizontal scrolling speed", OFFSET(h_speed), > AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, > + { "h", "set the horizontal scrolling speed", OFFSET(h_speed), > AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, > + { "vertical", "set the vertical scrolling speed", OFFSET(v_speed), > AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, > + { "v", "set the vertical scrolling speed", OFFSET(v_speed), > AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, > + { "hpos", "set initial horizontal position", OFFSET(h_ipos), > AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS }, > + { "vpos", "set initial vertical position", OFFSET(v_ipos), > AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS }, > + { NULL } > +}; > + > +AVFILTER_DEFINE_CLASS(scroll); > + > +static const AVFilterPad scroll_inputs[] = { > + { > + .name = "default", > + .type = AVMEDIA_TYPE_VIDEO, > + .config_props = config_input, > + .filter_frame = filter_frame, > + }, > + { NULL } > +}; > + > +static const AVFilterPad scroll_outputs[] = { > + { > + .name = "default", > + .type = AVMEDIA_TYPE_VIDEO, > + }, > + { NULL } > +}; > + > +AVFilter ff_vf_scroll = { > + .name = "scroll", > + .description = NULL_IF_CONFIG_SMALL("Scroll input video."), > + .priv_size = sizeof(ScrollContext), > + .priv_class = &scroll_class, > + .query_formats = query_formats, > + .inputs = scroll_inputs, > + .outputs = scroll_outputs, > + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, > +}; > -- > 2.17.1 > >
diff --git a/doc/filters.texi b/doc/filters.texi index 333f502083..416bb327c1 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -15650,6 +15650,26 @@ Scale a logo to 1/10th the height of a video, while preserving its display aspec @end example @end itemize +@section scroll +Scroll input video horizontally and/or vertically by constant speed. + +The filter accepts the following options: +@table @option +@item horizontal, h +Set the horizontal scrolling speed. Default is 0. Allowed range is from -1 to 1. +Negative values changes scrolling direction. + +@item vertical, v +Set the vertical scrolling speed. Default is 0. Allowed range is from -1 to 1. +Negative values changes scrolling direction. + +@item hpos +Set the initial horizontal scrolling position. Default is 0. Allowed range is from 0 to 1. + +@item vpos +Set the initial vertical scrolling position. Default is 0. Allowed range is from 0 to 1. +@end table + @anchor{selectivecolor} @section selectivecolor diff --git a/libavfilter/Makefile b/libavfilter/Makefile index b99ecc8c26..124a3496e6 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -356,6 +356,7 @@ OBJS-$(CONFIG_SCALE_NPP_FILTER) += vf_scale_npp.o scale.o OBJS-$(CONFIG_SCALE_QSV_FILTER) += vf_scale_qsv.o OBJS-$(CONFIG_SCALE_VAAPI_FILTER) += vf_scale_vaapi.o scale.o vaapi_vpp.o OBJS-$(CONFIG_SCALE2REF_FILTER) += vf_scale.o scale.o +OBJS-$(CONFIG_SCROLL_FILTER) += vf_scroll.o OBJS-$(CONFIG_SELECT_FILTER) += f_select.o OBJS-$(CONFIG_SELECTIVECOLOR_FILTER) += vf_selectivecolor.o OBJS-$(CONFIG_SENDCMD_FILTER) += f_sendcmd.o diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c index 788652ab1e..0408bcd3df 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -338,6 +338,7 @@ extern AVFilter ff_vf_scale_npp; extern AVFilter ff_vf_scale_qsv; extern AVFilter ff_vf_scale_vaapi; extern AVFilter ff_vf_scale2ref; +extern AVFilter ff_vf_scroll; extern AVFilter ff_vf_select; extern AVFilter ff_vf_selectivecolor; extern AVFilter ff_vf_sendcmd; diff --git a/libavfilter/vf_scroll.c b/libavfilter/vf_scroll.c new file mode 100644 index 0000000000..36db39f2ac --- /dev/null +++ b/libavfilter/vf_scroll.c @@ -0,0 +1,200 @@ +/* + * Copyright (c) 2019 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/colorspace.h" +#include "libavutil/common.h" +#include "libavutil/opt.h" +#include "libavutil/pixdesc.h" +#include "avfilter.h" +#include "drawutils.h" +#include "formats.h" +#include "internal.h" +#include "video.h" + +typedef struct ScrollContext { + const AVClass *class; + + float h_speed, v_speed; + float h_pos, v_pos; + float h_ipos, v_ipos; + + const AVPixFmtDescriptor *desc; + int nb_planes; + int bytes; + + int planewidth[4]; + int planeheight[4]; +} ScrollContext; + +static int query_formats(AVFilterContext *ctx) +{ + static const enum AVPixelFormat pix_fmts[] = { + AV_PIX_FMT_YUVA444P, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV440P, + AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, + AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUV420P, + AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, + AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, + AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV444P9, + AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV444P10, + AV_PIX_FMT_YUV420P12, AV_PIX_FMT_YUV422P12, AV_PIX_FMT_YUV444P12, AV_PIX_FMT_YUV440P12, + AV_PIX_FMT_YUV420P14, AV_PIX_FMT_YUV422P14, AV_PIX_FMT_YUV444P14, + AV_PIX_FMT_YUV420P16, AV_PIX_FMT_YUV422P16, AV_PIX_FMT_YUV444P16, + AV_PIX_FMT_YUVA420P9, AV_PIX_FMT_YUVA422P9, AV_PIX_FMT_YUVA444P9, + AV_PIX_FMT_YUVA420P10, AV_PIX_FMT_YUVA422P10, AV_PIX_FMT_YUVA444P10, + AV_PIX_FMT_YUVA420P16, AV_PIX_FMT_YUVA422P16, AV_PIX_FMT_YUVA444P16, + AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, + AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, + AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, + AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, + AV_PIX_FMT_NONE + }; + + AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts); + if (!fmts_list) + return AVERROR(ENOMEM); + return ff_set_common_formats(ctx, fmts_list); +} + +static void scroll(ScrollContext *s, AVFrame *in, AVFrame *out) +{ + int h_pos, v_pos; + int pos_h[4], pos_v[4]; + + s->h_pos += s->h_speed * in->width; + s->v_pos += s->v_speed * in->height; + + s->h_pos = fmodf(s->h_pos, in->width); + s->v_pos = fmodf(s->v_pos, in->height); + + h_pos = s->h_pos; + v_pos = s->v_pos; + + if (h_pos < 0) + h_pos += in->width; + if (v_pos < 0) + v_pos += in->height; + + pos_v[1] = pos_v[2] = AV_CEIL_RSHIFT(v_pos, s->desc->log2_chroma_h); + pos_v[0] = pos_v[3] = v_pos; + pos_h[1] = pos_h[2] = AV_CEIL_RSHIFT(h_pos, s->desc->log2_chroma_w) * s->bytes; + pos_h[0] = pos_h[3] = h_pos * s->bytes; + + for (int p = 0; p < s->nb_planes; p++) { + const uint8_t *src = in->data[p]; + uint8_t *dst = out->data[p]; + const int h = s->planeheight[p]; + const int w = s->planewidth[p] * s->bytes; + + for (int y = 0; y < h; y++) { + int yy = (y + pos_v[p]) % h; + const uint8_t *ssrc = src + yy * in->linesize[p]; + + memcpy(dst, ssrc + pos_h[p], w - pos_h[p]); + if (pos_h[p]) + memcpy(dst + w - pos_h[p], ssrc, pos_h[p]); + + dst += out->linesize[p]; + } + } +} + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + AVFilterContext *ctx = inlink->dst; + ScrollContext *s = ctx->priv; + AVFilterLink *outlink = ctx->outputs[0]; + AVFrame *out; + + out = ff_get_video_buffer(outlink, outlink->w, outlink->h); + if (!out) { + av_frame_free(&in); + return AVERROR(ENOMEM); + } + av_frame_copy_props(out, in); + + scroll(s, in, out); + + av_frame_free(&in); + return ff_filter_frame(outlink, out); +} + +static int config_input(AVFilterLink *inlink) +{ + AVFilterContext *ctx = inlink->dst; + ScrollContext *s = ctx->priv; + + s->desc = av_pix_fmt_desc_get(inlink->format); + s->nb_planes = s->desc->nb_components; + s->bytes = (s->desc->comp[0].depth + 7) >> 3; + + s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, s->desc->log2_chroma_h); + s->planeheight[0] = s->planeheight[3] = inlink->h; + s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, s->desc->log2_chroma_w); + s->planewidth[0] = s->planewidth[3] = inlink->w; + + s->h_pos += s->h_ipos * inlink->w; + s->v_pos += s->v_ipos * inlink->h; + + return 0; +} + +#define OFFSET(x) offsetof(ScrollContext, x) +#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption scroll_options[] = { + { "horizontal", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, + { "h", "set the horizontal scrolling speed", OFFSET(h_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, + { "vertical", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, + { "v", "set the vertical scrolling speed", OFFSET(v_speed), AV_OPT_TYPE_FLOAT, {.dbl=0.}, -1., 1., FLAGS }, + { "hpos", "set initial horizontal position", OFFSET(h_ipos), AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS }, + { "vpos", "set initial vertical position", OFFSET(v_ipos), AV_OPT_TYPE_FLOAT, {.dbl=0.}, 0, 1., FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(scroll); + +static const AVFilterPad scroll_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .config_props = config_input, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad scroll_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + }, + { NULL } +}; + +AVFilter ff_vf_scroll = { + .name = "scroll", + .description = NULL_IF_CONFIG_SMALL("Scroll input video."), + .priv_size = sizeof(ScrollContext), + .priv_class = &scroll_class, + .query_formats = query_formats, + .inputs = scroll_inputs, + .outputs = scroll_outputs, + .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC, +};
Signed-off-by: Paul B Mahol <onemda@gmail.com> --- doc/filters.texi | 20 ++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/vf_scroll.c | 200 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 222 insertions(+) create mode 100644 libavfilter/vf_scroll.c