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https://github.com/FFmpeg/FFmpeg.git
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avfilter: add framerate video filter
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
57cd2f7777
commit
15f4b3db58
@ -37,6 +37,7 @@ version <next>:
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- hstack and vstack filter
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- Support DNx100 (1440x1080@8)
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- VAAPI hevc hwaccel
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- framerate filter
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version 2.7:
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@ -6015,6 +6015,51 @@ ffmpeg -i LEFT -i RIGHT -filter_complex framepack=frameseq OUTPUT
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ffmpeg -i LEFT -i RIGHT -filter_complex [0:v]scale=w=iw/2[left],[1:v]scale=w=iw/2[right],[left][right]framepack=sbs OUTPUT
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@end example
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@section framerate
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Change the frame rate by interpolating new video output frames from the source
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frames.
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This filter is not designed to function correctly with interlaced media. If
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you wish to change the frame rate of interlaced media then you are required
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to deinterlace before this filter and re-interlace after this filter.
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A description of the accepted options follows.
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@table @option
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@item fps
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Specify the output frames per second. This option can also be specified
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as a value alone. The default is @code{50}.
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@item interp_start
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Specify the start of a range where the output frame will be created as a
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linear interpolation of two frames. The range is [@code{0}-@code{255}],
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the default is @code{15}.
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@item interp_end
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Specify the end of a range where the output frame will be created as a
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linear interpolation of two frames. The range is [@code{0}-@code{255}],
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the default is @code{240}.
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@item scene
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Specify the level at which a scene change is detected as a value between
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0 and 100 to indicate a new scene; a low value reflects a low
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probability for the current frame to introduce a new scene, while a higher
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value means the current frame is more likely to be one.
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The default is @code{7}.
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@item flags
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Specify flags influencing the filter process.
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Available value for @var{flags} is:
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@table @option
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@item scene_change_detect, scd
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Enable scene change detection using the value of the option @var{scene}.
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This flag is enabled by default.
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@end table
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@end table
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@section framestep
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Select one frame every N-th frame.
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@ -142,6 +142,7 @@ OBJS-$(CONFIG_FIND_RECT_FILTER) += vf_find_rect.o lavfutils.o
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OBJS-$(CONFIG_FORMAT_FILTER) += vf_format.o
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OBJS-$(CONFIG_FPS_FILTER) += vf_fps.o
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OBJS-$(CONFIG_FRAMEPACK_FILTER) += vf_framepack.o
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OBJS-$(CONFIG_FRAMERATE_FILTER) += vf_framerate.o
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OBJS-$(CONFIG_FRAMESTEP_FILTER) += vf_framestep.o
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OBJS-$(CONFIG_FREI0R_FILTER) += vf_frei0r.o
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OBJS-$(CONFIG_FSPP_FILTER) += vf_fspp.o
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@ -158,6 +158,7 @@ void avfilter_register_all(void)
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REGISTER_FILTER(FORMAT, format, vf);
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REGISTER_FILTER(FPS, fps, vf);
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REGISTER_FILTER(FRAMEPACK, framepack, vf);
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REGISTER_FILTER(FRAMERATE, framerate, vf);
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REGISTER_FILTER(FRAMESTEP, framestep, vf);
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REGISTER_FILTER(FREI0R, frei0r, vf);
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REGISTER_FILTER(FSPP, fspp, vf);
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@ -30,7 +30,7 @@
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#include "libavutil/version.h"
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#define LIBAVFILTER_VERSION_MAJOR 5
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#define LIBAVFILTER_VERSION_MINOR 38
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#define LIBAVFILTER_VERSION_MINOR 39
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#define LIBAVFILTER_VERSION_MICRO 100
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#define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
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592
libavfilter/vf_framerate.c
Normal file
592
libavfilter/vf_framerate.c
Normal file
@ -0,0 +1,592 @@
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/*
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* Copyright (C) 2012 Mark Himsley
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*
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* get_scene_score() Copyright (c) 2011 Stefano Sabatini
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* taken from libavfilter/vf_select.c
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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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/**
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* @file
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* filter for upsampling or downsampling a progressive source
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*/
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#define DEBUG
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#include "libavutil/avassert.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/internal.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "libavutil/pixelutils.h"
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#include "avfilter.h"
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#include "internal.h"
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#include "video.h"
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#define N_SRCE 3
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typedef struct FrameRateContext {
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const AVClass *class;
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// parameters
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AVRational dest_frame_rate; ///< output frames per second
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int flags; ///< flags affecting frame rate conversion algorithm
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double scene_score; ///< score that denotes a scene change has happened
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int interp_start; ///< start of range to apply linear interpolation
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int interp_end; ///< end of range to apply linear interpolation
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int line_size[4]; ///< bytes of pixel data per line for each plane
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int vsub;
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int frst, next, prev, crnt, last;
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int pending_srce_frames; ///< how many input frames are still waiting to be processed
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int flush; ///< are we flushing final frames
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int pending_end_frame; ///< flag indicating we are waiting to call filter_frame()
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AVRational srce_time_base; ///< timebase of source
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AVRational dest_time_base; ///< timebase of destination
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int32_t dest_frame_num;
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int64_t last_dest_frame_pts; ///< pts of the last frame output
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int64_t average_srce_pts_dest_delta;///< average input pts delta converted from input rate to output rate
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int64_t average_dest_pts_delta; ///< calculated average output pts delta
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av_pixelutils_sad_fn sad; ///< Sum of the absolute difference function (scene detect only)
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double prev_mafd; ///< previous MAFD (scene detect only)
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AVFrame *srce[N_SRCE]; ///< buffered source frames
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int64_t srce_pts_dest[N_SRCE]; ///< pts for source frames scaled to output timebase
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int64_t pts; ///< pts of frame we are working on
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} FrameRateContext;
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#define OFFSET(x) offsetof(FrameRateContext, x)
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#define V AV_OPT_FLAG_VIDEO_PARAM
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#define F AV_OPT_FLAG_FILTERING_PARAM
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#define FRAMERATE_FLAG_SCD 01
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static const AVOption framerate_options[] = {
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{"fps", "required output frames per second rate", OFFSET(dest_frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="50"}, 0, INT_MAX, V|F },
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{"interp_start", "point to start linear interpolation", OFFSET(interp_start), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, V|F },
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{"interp_end", "point to end linear interpolation", OFFSET(interp_end), AV_OPT_TYPE_INT, {.i64=240}, 0, 255, V|F },
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{"scene", "scene change level", OFFSET(scene_score), AV_OPT_TYPE_DOUBLE, {.dbl=7.0}, 0, INT_MAX, V|F },
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{"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64=1}, 0, INT_MAX, V|F, "flags" },
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{"scene_change_detect", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
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{"scd", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
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{NULL}
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};
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AVFILTER_DEFINE_CLASS(framerate);
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static void next_source(AVFilterContext *ctx)
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{
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FrameRateContext *s = ctx->priv;
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int i;
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ff_dlog(ctx, "next_source()\n");
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if (s->srce[s->last] && s->srce[s->last] != s->srce[s->last-1]) {
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ff_dlog(ctx, "next_source() unlink %d\n", s->last);
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av_frame_free(&s->srce[s->last]);
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}
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for (i = s->last; i > s->frst; i--) {
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ff_dlog(ctx, "next_source() copy %d to %d\n", i - 1, i);
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s->srce[i] = s->srce[i - 1];
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}
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ff_dlog(ctx, "next_source() make %d null\n", s->frst);
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s->srce[s->frst] = NULL;
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}
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static double get_scene_score(AVFilterContext *ctx, AVFrame *crnt, AVFrame *next)
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{
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FrameRateContext *s = ctx->priv;
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double ret = 0;
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ff_dlog(ctx, "get_scene_score()\n");
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if (crnt &&
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crnt->height == next->height &&
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crnt->width == next->width) {
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int x, y;
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int64_t sad;
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double mafd, diff;
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uint8_t *p1 = crnt->data[0];
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uint8_t *p2 = next->data[0];
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const int p1_linesize = crnt->linesize[0];
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const int p2_linesize = next->linesize[0];
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ff_dlog(ctx, "get_scene_score() process\n");
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for (sad = y = 0; y < crnt->height; y += 8) {
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for (x = 0; x < p1_linesize; x += 8) {
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sad += s->sad(p1 + y * p1_linesize + x,
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p1_linesize,
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p2 + y * p2_linesize + x,
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p2_linesize);
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}
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}
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emms_c();
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mafd = sad / (crnt->height * crnt->width * 3);
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diff = fabs(mafd - s->prev_mafd);
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ret = av_clipf(FFMIN(mafd, diff), 0, 100.0);
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s->prev_mafd = mafd;
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}
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ff_dlog(ctx, "get_scene_score() result is:%f\n", ret);
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return ret;
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}
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static int process_work_frame(AVFilterContext *ctx, int stop)
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{
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FrameRateContext *s = ctx->priv;
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AVFilterLink *outlink = ctx->outputs[0];
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int64_t work_next_pts;
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AVFrame *copy_src1, *copy_src2, *work;
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int interpolate;
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ff_dlog(ctx, "process_work_frame()\n");
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ff_dlog(ctx, "process_work_frame() pending_input_frames %d\n", s->pending_srce_frames);
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if (s->srce[s->prev]) ff_dlog(ctx, "process_work_frame() srce prev pts:%"PRId64"\n", s->srce[s->prev]->pts);
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if (s->srce[s->crnt]) ff_dlog(ctx, "process_work_frame() srce crnt pts:%"PRId64"\n", s->srce[s->crnt]->pts);
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if (s->srce[s->next]) ff_dlog(ctx, "process_work_frame() srce next pts:%"PRId64"\n", s->srce[s->next]->pts);
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if (!s->srce[s->crnt]) {
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// the filter cannot do anything
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ff_dlog(ctx, "process_work_frame() no current frame cached: move on to next frame, do not output a frame\n");
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next_source(ctx);
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return 0;
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}
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work_next_pts = s->pts + s->average_dest_pts_delta;
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ff_dlog(ctx, "process_work_frame() work crnt pts:%"PRId64"\n", s->pts);
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ff_dlog(ctx, "process_work_frame() work next pts:%"PRId64"\n", work_next_pts);
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if (s->srce[s->prev])
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ff_dlog(ctx, "process_work_frame() srce prev pts:%"PRId64" at dest time base:%u/%u\n",
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s->srce_pts_dest[s->prev], s->dest_time_base.num, s->dest_time_base.den);
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if (s->srce[s->crnt])
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ff_dlog(ctx, "process_work_frame() srce crnt pts:%"PRId64" at dest time base:%u/%u\n",
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s->srce_pts_dest[s->crnt], s->dest_time_base.num, s->dest_time_base.den);
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if (s->srce[s->next])
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ff_dlog(ctx, "process_work_frame() srce next pts:%"PRId64" at dest time base:%u/%u\n",
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s->srce_pts_dest[s->next], s->dest_time_base.num, s->dest_time_base.den);
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av_assert0(s->srce[s->next]);
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// should filter be skipping input frame (output frame rate is lower than input frame rate)
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if (!s->flush && s->pts >= s->srce_pts_dest[s->next]) {
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ff_dlog(ctx, "process_work_frame() work crnt pts >= srce next pts: SKIP FRAME, move on to next frame, do not output a frame\n");
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next_source(ctx);
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s->pending_srce_frames--;
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return 0;
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}
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// calculate interpolation
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interpolate = (int) ((s->pts - s->srce_pts_dest[s->crnt]) * 256.0 / s->average_srce_pts_dest_delta);
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ff_dlog(ctx, "process_work_frame() interpolate:%d/256\n", interpolate);
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copy_src1 = s->srce[s->crnt];
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if (interpolate > s->interp_end) {
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ff_dlog(ctx, "process_work_frame() source is:NEXT\n");
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copy_src1 = s->srce[s->next];
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}
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if (s->srce[s->prev] && interpolate < -s->interp_end) {
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ff_dlog(ctx, "process_work_frame() source is:PREV\n");
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copy_src1 = s->srce[s->prev];
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}
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// decide whether to blend two frames
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if ((interpolate >= s->interp_start && interpolate <= s->interp_end) || (interpolate <= -s->interp_start && interpolate >= -s->interp_end)) {
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double interpolate_scene_score = 0;
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if (interpolate > 0) {
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ff_dlog(ctx, "process_work_frame() interpolate source is:NEXT\n");
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copy_src2 = s->srce[s->next];
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} else {
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ff_dlog(ctx, "process_work_frame() interpolate source is:PREV\n");
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copy_src2 = s->srce[s->prev];
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}
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if ((s->flags & FRAMERATE_FLAG_SCD) && copy_src2) {
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interpolate_scene_score = get_scene_score(ctx, copy_src1, copy_src2);
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ff_dlog(ctx, "process_work_frame() interpolate scene score:%f\n", interpolate_scene_score);
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}
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// decide if the shot-change detection allows us to blend two frames
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if (interpolate_scene_score < s->scene_score && copy_src2) {
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uint16_t src2_factor = abs(interpolate);
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uint16_t src1_factor = 256 - src2_factor;
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int plane, line, pixel;
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// get work-space for output frame
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work = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!work)
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return AVERROR(ENOMEM);
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av_frame_copy_props(work, s->srce[s->crnt]);
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ff_dlog(ctx, "process_work_frame() INTERPOLATE to create work frame\n");
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for (plane = 0; plane < 4 && copy_src1->data[plane] && copy_src2->data[plane]; plane++) {
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int cpy_line_width = s->line_size[plane];
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uint8_t *cpy_src1_data = copy_src1->data[plane];
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int cpy_src1_line_size = copy_src1->linesize[plane];
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uint8_t *cpy_src2_data = copy_src2->data[plane];
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int cpy_src2_line_size = copy_src2->linesize[plane];
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int cpy_src_h = (plane > 0 && plane < 3) ? (copy_src1->height >> s->vsub) : (copy_src1->height);
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uint8_t *cpy_dst_data = work->data[plane];
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int cpy_dst_line_size = work->linesize[plane];
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if (plane <1 || plane >2) {
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// luma or alpha
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for (line = 0; line < cpy_src_h; line++) {
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for (pixel = 0; pixel < cpy_line_width; pixel++) {
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// integer version of (src1 * src1_factor) + (src2 + src2_factor) + 0.5
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// 0.5 is for rounding
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// 128 is the integer representation of 0.5 << 8
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cpy_dst_data[pixel] = ((cpy_src1_data[pixel] * src1_factor) + (cpy_src2_data[pixel] * src2_factor) + 128) >> 8;
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}
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cpy_src1_data += cpy_src1_line_size;
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cpy_src2_data += cpy_src2_line_size;
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cpy_dst_data += cpy_dst_line_size;
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}
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} else {
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// chroma
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for (line = 0; line < cpy_src_h; line++) {
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for (pixel = 0; pixel < cpy_line_width; pixel++) {
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// as above
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// because U and V are based around 128 we have to subtract 128 from the components.
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// 32896 is the integer representation of 128.5 << 8
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cpy_dst_data[pixel] = (((cpy_src1_data[pixel] - 128) * src1_factor) + ((cpy_src2_data[pixel] - 128) * src2_factor) + 32896) >> 8;
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}
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cpy_src1_data += cpy_src1_line_size;
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cpy_src2_data += cpy_src2_line_size;
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cpy_dst_data += cpy_dst_line_size;
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}
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}
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}
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goto copy_done;
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}
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else {
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ff_dlog(ctx, "process_work_frame() CUT - DON'T INTERPOLATE\n");
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}
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}
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ff_dlog(ctx, "process_work_frame() COPY to the work frame\n");
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// copy the frame we decided is our base source
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work = av_frame_clone(copy_src1);
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if (!work)
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return AVERROR(ENOMEM);
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copy_done:
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work->pts = s->pts;
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// should filter be re-using input frame (output frame rate is higher than input frame rate)
|
||||
if (!s->flush && (work_next_pts + s->average_dest_pts_delta) < (s->srce_pts_dest[s->crnt] + s->average_srce_pts_dest_delta)) {
|
||||
ff_dlog(ctx, "process_work_frame() REPEAT FRAME\n");
|
||||
} else {
|
||||
ff_dlog(ctx, "process_work_frame() CONSUME FRAME, move to next frame\n");
|
||||
s->pending_srce_frames--;
|
||||
next_source(ctx);
|
||||
}
|
||||
ff_dlog(ctx, "process_work_frame() output a frame\n");
|
||||
s->dest_frame_num++;
|
||||
if (stop)
|
||||
s->pending_end_frame = 0;
|
||||
s->last_dest_frame_pts = work->pts;
|
||||
|
||||
return ff_filter_frame(ctx->outputs[0], work);
|
||||
}
|
||||
|
||||
static void set_srce_frame_dest_pts(AVFilterContext *ctx)
|
||||
{
|
||||
FrameRateContext *s = ctx->priv;
|
||||
|
||||
ff_dlog(ctx, "set_srce_frame_output_pts()\n");
|
||||
|
||||
// scale the input pts from the timebase difference between input and output
|
||||
if (s->srce[s->prev])
|
||||
s->srce_pts_dest[s->prev] = av_rescale_q(s->srce[s->prev]->pts, s->srce_time_base, s->dest_time_base);
|
||||
if (s->srce[s->crnt])
|
||||
s->srce_pts_dest[s->crnt] = av_rescale_q(s->srce[s->crnt]->pts, s->srce_time_base, s->dest_time_base);
|
||||
if (s->srce[s->next])
|
||||
s->srce_pts_dest[s->next] = av_rescale_q(s->srce[s->next]->pts, s->srce_time_base, s->dest_time_base);
|
||||
}
|
||||
|
||||
static void set_work_frame_pts(AVFilterContext *ctx)
|
||||
{
|
||||
FrameRateContext *s = ctx->priv;
|
||||
int64_t pts, average_srce_pts_delta = 0;
|
||||
|
||||
ff_dlog(ctx, "set_work_frame_pts()\n");
|
||||
|
||||
av_assert0(s->srce[s->next]);
|
||||
av_assert0(s->srce[s->crnt]);
|
||||
|
||||
ff_dlog(ctx, "set_work_frame_pts() srce crnt pts:%"PRId64"\n", s->srce[s->crnt]->pts);
|
||||
ff_dlog(ctx, "set_work_frame_pts() srce next pts:%"PRId64"\n", s->srce[s->next]->pts);
|
||||
if (s->srce[s->prev])
|
||||
ff_dlog(ctx, "set_work_frame_pts() srce prev pts:%"PRId64"\n", s->srce[s->prev]->pts);
|
||||
|
||||
average_srce_pts_delta = s->average_srce_pts_dest_delta;
|
||||
ff_dlog(ctx, "set_work_frame_pts() initial average srce pts:%"PRId64"\n", average_srce_pts_delta);
|
||||
|
||||
// calculate the PTS delta
|
||||
if ((pts = (s->srce[s->next]->pts - s->srce[s->crnt]->pts))) {
|
||||
average_srce_pts_delta = average_srce_pts_delta?((average_srce_pts_delta+pts)>>1):pts;
|
||||
} else if (s->srce[s->prev] && (pts = (s->srce[s->crnt]->pts - s->srce[s->prev]->pts))) {
|
||||
average_srce_pts_delta = average_srce_pts_delta?((average_srce_pts_delta+pts)>>1):pts;
|
||||
}
|
||||
|
||||
s->average_srce_pts_dest_delta = av_rescale_q(average_srce_pts_delta, s->srce_time_base, s->dest_time_base);
|
||||
ff_dlog(ctx, "set_work_frame_pts() average srce pts:%"PRId64"\n", average_srce_pts_delta);
|
||||
ff_dlog(ctx, "set_work_frame_pts() average srce pts:%"PRId64" at dest time base:%u/%u\n",
|
||||
s->average_srce_pts_dest_delta, s->dest_time_base.num, s->dest_time_base.den);
|
||||
|
||||
set_srce_frame_dest_pts(ctx);
|
||||
|
||||
if (ctx->inputs[0] && !s->average_dest_pts_delta) {
|
||||
int64_t d = av_q2d(av_inv_q(av_mul_q(s->srce_time_base, s->dest_frame_rate)));
|
||||
if (d == 0) { // FIXME
|
||||
av_log(ctx, AV_LOG_WARNING, "Buggy path reached, use settb filter before this filter!\n");
|
||||
d = av_q2d(av_mul_q(ctx->inputs[0]->time_base, s->dest_frame_rate));
|
||||
}
|
||||
s->average_dest_pts_delta = av_rescale_q(d, s->srce_time_base, s->dest_time_base);
|
||||
ff_dlog(ctx, "set_frame_pts() average output pts from input timebase\n");
|
||||
ff_dlog(ctx, "set_work_frame_pts() average dest pts delta:%"PRId64"\n", s->average_dest_pts_delta);
|
||||
}
|
||||
|
||||
if (!s->dest_frame_num) {
|
||||
s->pts = s->last_dest_frame_pts = s->srce_pts_dest[s->crnt];
|
||||
} else {
|
||||
s->pts = s->last_dest_frame_pts + s->average_dest_pts_delta;
|
||||
}
|
||||
|
||||
ff_dlog(ctx, "set_work_frame_pts() calculated pts:%"PRId64" at dest time base:%u/%u\n",
|
||||
s->pts, s->dest_time_base.num, s->dest_time_base.den);
|
||||
}
|
||||
|
||||
static av_cold int init(AVFilterContext *ctx)
|
||||
{
|
||||
FrameRateContext *s = ctx->priv;
|
||||
|
||||
s->dest_frame_num = 0;
|
||||
|
||||
s->crnt = (N_SRCE)>>1;
|
||||
s->last = N_SRCE - 1;
|
||||
|
||||
s->next = s->crnt - 1;
|
||||
s->prev = s->crnt + 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static av_cold void uninit(AVFilterContext *ctx)
|
||||
{
|
||||
FrameRateContext *s = ctx->priv;
|
||||
int i;
|
||||
|
||||
for (i = s->frst + 1; i > s->last; i++) {
|
||||
if (s->srce[i] && (s->srce[i] != s->srce[i + 1]))
|
||||
av_frame_free(&s->srce[i]);
|
||||
}
|
||||
av_frame_free(&s->srce[s->last]);
|
||||
}
|
||||
|
||||
static int query_formats(AVFilterContext *ctx)
|
||||
{
|
||||
static const enum AVPixelFormat pix_fmts[] = {
|
||||
AV_PIX_FMT_YUV410P,
|
||||
AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P,
|
||||
AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P,
|
||||
AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P,
|
||||
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P,
|
||||
AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P,
|
||||
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 int config_input(AVFilterLink *inlink)
|
||||
{
|
||||
AVFilterContext *ctx = inlink->dst;
|
||||
FrameRateContext *s = ctx->priv;
|
||||
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
|
||||
int plane;
|
||||
|
||||
for (plane = 0; plane < 4; plane++) {
|
||||
s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w,
|
||||
plane);
|
||||
}
|
||||
|
||||
s->vsub = pix_desc->log2_chroma_h;
|
||||
|
||||
s->sad = av_pixelutils_get_sad_fn(3, 3, 2, s); // 8x8 both sources aligned
|
||||
if (!s->sad)
|
||||
return AVERROR(EINVAL);
|
||||
|
||||
s->srce_time_base = inlink->time_base;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int filter_frame(AVFilterLink *inlink, AVFrame *inpicref)
|
||||
{
|
||||
AVFilterContext *ctx = inlink->dst;
|
||||
FrameRateContext *s = ctx->priv;
|
||||
|
||||
// we have one new frame
|
||||
s->pending_srce_frames++;
|
||||
|
||||
if (inpicref->interlaced_frame)
|
||||
av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n");
|
||||
|
||||
// store the pointer to the new frame
|
||||
av_frame_free(&s->srce[s->frst]);
|
||||
s->srce[s->frst] = inpicref;
|
||||
|
||||
if (!s->pending_end_frame && s->srce[s->crnt]) {
|
||||
set_work_frame_pts(ctx);
|
||||
s->pending_end_frame = 1;
|
||||
} else {
|
||||
set_srce_frame_dest_pts(ctx);
|
||||
}
|
||||
|
||||
return process_work_frame(ctx, 1);
|
||||
}
|
||||
|
||||
static int config_output(AVFilterLink *outlink)
|
||||
{
|
||||
AVFilterContext *ctx = outlink->src;
|
||||
FrameRateContext *s = ctx->priv;
|
||||
int exact;
|
||||
|
||||
ff_dlog(ctx, "config_output()\n");
|
||||
|
||||
ff_dlog(ctx,
|
||||
"config_output() input time base:%u/%u (%f)\n",
|
||||
ctx->inputs[0]->time_base.num,ctx->inputs[0]->time_base.den,
|
||||
av_q2d(ctx->inputs[0]->time_base));
|
||||
|
||||
// make sure timebase is small enough to hold the framerate
|
||||
|
||||
exact = av_reduce(&s->dest_time_base.num, &s->dest_time_base.den,
|
||||
av_gcd((int64_t)s->srce_time_base.num * s->dest_frame_rate.num,
|
||||
(int64_t)s->srce_time_base.den * s->dest_frame_rate.den ),
|
||||
(int64_t)s->srce_time_base.den * s->dest_frame_rate.num, INT_MAX);
|
||||
|
||||
av_log(ctx, AV_LOG_INFO,
|
||||
"time base:%u/%u -> %u/%u exact:%d\n",
|
||||
s->srce_time_base.num, s->srce_time_base.den,
|
||||
s->dest_time_base.num, s->dest_time_base.den, exact);
|
||||
if (!exact) {
|
||||
av_log(ctx, AV_LOG_WARNING, "Timebase conversion is not exact\n");
|
||||
}
|
||||
|
||||
outlink->frame_rate = s->dest_frame_rate;
|
||||
outlink->time_base = s->dest_time_base;
|
||||
outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP;
|
||||
|
||||
ff_dlog(ctx,
|
||||
"config_output() output time base:%u/%u (%f) w:%d h:%d\n",
|
||||
outlink->time_base.num, outlink->time_base.den,
|
||||
av_q2d(outlink->time_base),
|
||||
outlink->w, outlink->h);
|
||||
|
||||
|
||||
av_log(ctx, AV_LOG_INFO, "fps -> fps:%u/%u scene score:%f interpolate start:%d end:%d\n",
|
||||
s->dest_frame_rate.num, s->dest_frame_rate.den,
|
||||
s->scene_score, s->interp_start, s->interp_end);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int request_frame(AVFilterLink *outlink)
|
||||
{
|
||||
AVFilterContext *ctx = outlink->src;
|
||||
FrameRateContext *s = ctx->priv;
|
||||
int val, i;
|
||||
|
||||
ff_dlog(ctx, "request_frame()\n");
|
||||
|
||||
// if there is no "next" frame AND we are not in flush then get one from our input filter
|
||||
if (!s->srce[s->frst] && !s->flush) {
|
||||
ff_dlog(ctx, "request_frame() call source's request_frame()\n");
|
||||
if ((val = ff_request_frame(outlink->src->inputs[0])) < 0) {
|
||||
ff_dlog(ctx, "request_frame() source's request_frame() returned error:%d\n", val);
|
||||
return val;
|
||||
}
|
||||
ff_dlog(ctx, "request_frame() source's request_frame() returned:%d\n", val);
|
||||
return 0;
|
||||
}
|
||||
|
||||
ff_dlog(ctx, "request_frame() REPEAT or FLUSH\n");
|
||||
|
||||
if (s->pending_srce_frames <= 0) {
|
||||
ff_dlog(ctx, "request_frame() nothing else to do, return:EOF\n");
|
||||
return AVERROR_EOF;
|
||||
}
|
||||
|
||||
// otherwise, make brand-new frame and pass to our output filter
|
||||
ff_dlog(ctx, "request_frame() FLUSH\n");
|
||||
|
||||
// back fill at end of file when source has no more frames
|
||||
for (i = s->last; i > s->frst; i--) {
|
||||
if (!s->srce[i - 1] && s->srce[i]) {
|
||||
ff_dlog(ctx, "request_frame() copy:%d to:%d\n", i, i - 1);
|
||||
s->srce[i - 1] = s->srce[i];
|
||||
}
|
||||
}
|
||||
|
||||
set_work_frame_pts(ctx);
|
||||
return process_work_frame(ctx, 0);
|
||||
}
|
||||
|
||||
static const AVFilterPad framerate_inputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.config_props = config_input,
|
||||
.filter_frame = filter_frame,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
static const AVFilterPad framerate_outputs[] = {
|
||||
{
|
||||
.name = "default",
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.request_frame = request_frame,
|
||||
.config_props = config_output,
|
||||
},
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
AVFilter ff_vf_framerate = {
|
||||
.name = "framerate",
|
||||
.description = NULL_IF_CONFIG_SMALL("Upsamples or downsamples progressive source between specified frame rates."),
|
||||
.priv_size = sizeof(FrameRateContext),
|
||||
.priv_class = &framerate_class,
|
||||
.init = init,
|
||||
.uninit = uninit,
|
||||
.query_formats = query_formats,
|
||||
.inputs = framerate_inputs,
|
||||
.outputs = framerate_outputs,
|
||||
};
|
||||
Loading…
Reference in New Issue
Block a user