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447 lines
15 KiB
447 lines
15 KiB
/* |
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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 "avfilter.h" |
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#include "video.h" |
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#include "filters.h" |
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#include "framerate.h" |
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#include "scene_sad.h" |
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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=8.2}, 0, 100., V|F }, |
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{"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64=1}, 0, INT_MAX, V|F, .unit = "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, .unit = "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, .unit = "flags" }, |
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{NULL} |
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}; |
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AVFILTER_DEFINE_CLASS(framerate); |
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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->height == next->height && |
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crnt->width == next->width) { |
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uint64_t sad; |
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double mafd, diff; |
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ff_dlog(ctx, "get_scene_score() process\n"); |
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s->sad(crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height, &sad); |
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mafd = (double)sad * 100.0 / (crnt->width * crnt->height) / (1 << s->bitdepth); |
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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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typedef struct ThreadData { |
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AVFrame *copy_src1, *copy_src2; |
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uint16_t src1_factor, src2_factor; |
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} ThreadData; |
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static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs) |
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{ |
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FrameRateContext *s = ctx->priv; |
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ThreadData *td = arg; |
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AVFrame *work = s->work; |
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AVFrame *src1 = td->copy_src1; |
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AVFrame *src2 = td->copy_src2; |
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uint16_t src1_factor = td->src1_factor; |
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uint16_t src2_factor = td->src2_factor; |
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int plane; |
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for (plane = 0; plane < 4 && src1->data[plane] && src2->data[plane]; plane++) { |
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const int start = (s->height[plane] * job ) / nb_jobs; |
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const int end = (s->height[plane] * (job+1)) / nb_jobs; |
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uint8_t *src1_data = src1->data[plane] + start * src1->linesize[plane]; |
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uint8_t *src2_data = src2->data[plane] + start * src2->linesize[plane]; |
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uint8_t *dst_data = work->data[plane] + start * work->linesize[plane]; |
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s->blend(src1_data, src1->linesize[plane], src2_data, src2->linesize[plane], |
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dst_data, work->linesize[plane], s->line_size[plane], end - start, |
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src1_factor, src2_factor, s->blend_factor_max >> 1); |
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} |
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return 0; |
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} |
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static int blend_frames(AVFilterContext *ctx, int interpolate) |
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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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double interpolate_scene_score = 0; |
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if ((s->flags & FRAMERATE_FLAG_SCD)) { |
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if (s->score >= 0.0) |
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interpolate_scene_score = s->score; |
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else |
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interpolate_scene_score = s->score = get_scene_score(ctx, s->f0, s->f1); |
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ff_dlog(ctx, "blend_frames() 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) { |
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ThreadData td; |
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td.copy_src1 = s->f0; |
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td.copy_src2 = s->f1; |
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td.src2_factor = interpolate; |
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td.src1_factor = s->blend_factor_max - td.src2_factor; |
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// get work-space for output frame |
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s->work = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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if (!s->work) |
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return AVERROR(ENOMEM); |
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av_frame_copy_props(s->work, s->f0); |
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ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n"); |
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ff_filter_execute(ctx, filter_slice, &td, NULL, |
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FFMIN(FFMAX(1, outlink->h >> 2), ff_filter_get_nb_threads(ctx))); |
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return 1; |
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} |
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return 0; |
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} |
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static int process_work_frame(AVFilterContext *ctx) |
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{ |
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FrameRateContext *s = ctx->priv; |
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int64_t work_pts; |
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int64_t interpolate, interpolate8; |
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int ret; |
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if (!s->f1) |
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return 0; |
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if (!s->f0 && !s->flush) |
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return 0; |
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work_pts = s->start_pts + av_rescale_q(s->n, av_inv_q(s->dest_frame_rate), s->dest_time_base); |
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if (work_pts >= s->pts1 && !s->flush) |
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return 0; |
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if (!s->f0) { |
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av_assert1(s->flush); |
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s->work = s->f1; |
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s->f1 = NULL; |
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} else { |
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if (work_pts >= s->pts1 + s->delta && s->flush) |
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return 0; |
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interpolate = av_rescale(work_pts - s->pts0, s->blend_factor_max, s->delta); |
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interpolate8 = av_rescale(work_pts - s->pts0, 256, s->delta); |
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ff_dlog(ctx, "process_work_frame() interpolate: %"PRId64"/256\n", interpolate8); |
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if (interpolate >= s->blend_factor_max || interpolate8 > s->interp_end) { |
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s->work = av_frame_clone(s->f1); |
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} else if (interpolate <= 0 || interpolate8 < s->interp_start) { |
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s->work = av_frame_clone(s->f0); |
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} else { |
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ret = blend_frames(ctx, interpolate); |
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if (ret < 0) |
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return ret; |
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if (ret == 0) |
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s->work = av_frame_clone(interpolate > (s->blend_factor_max >> 1) ? s->f1 : s->f0); |
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} |
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} |
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if (!s->work) |
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return AVERROR(ENOMEM); |
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s->work->pts = work_pts; |
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s->n++; |
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return 1; |
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} |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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FrameRateContext *s = ctx->priv; |
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s->start_pts = AV_NOPTS_VALUE; |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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FrameRateContext *s = ctx->priv; |
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av_frame_free(&s->f0); |
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av_frame_free(&s->f1); |
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} |
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static const enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_YUV410P, |
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AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUVJ411P, |
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AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUVJ420P, |
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AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUVJ422P, |
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUVJ440P, |
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_YUV420P9, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12, |
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AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12, |
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AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12, |
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AV_PIX_FMT_NONE |
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}; |
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#define BLEND_FRAME_FUNC(nbits) \ |
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static void blend_frames##nbits##_c(BLEND_FUNC_PARAMS) \ |
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{ \ |
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int line, pixel; \ |
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uint##nbits##_t *dstw = (uint##nbits##_t *)dst; \ |
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uint##nbits##_t *src1w = (uint##nbits##_t *)src1; \ |
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uint##nbits##_t *src2w = (uint##nbits##_t *)src2; \ |
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int bytes = nbits / 8; \ |
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width /= bytes; \ |
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src1_linesize /= bytes; \ |
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src2_linesize /= bytes; \ |
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dst_linesize /= bytes; \ |
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for (line = 0; line < height; line++) { \ |
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for (pixel = 0; pixel < width; pixel++) \ |
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dstw[pixel] = ((src1w[pixel] * factor1) + \ |
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(src2w[pixel] * factor2) + half) \ |
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>> BLEND_FACTOR_DEPTH(nbits); \ |
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src1w += src1_linesize; \ |
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src2w += src2_linesize; \ |
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dstw += dst_linesize; \ |
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} \ |
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} |
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BLEND_FRAME_FUNC(8) |
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BLEND_FRAME_FUNC(16) |
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void ff_framerate_init(FrameRateContext *s) |
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{ |
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if (s->bitdepth == 8) { |
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s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(8); |
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s->blend = blend_frames8_c; |
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} else { |
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s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(16); |
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s->blend = blend_frames16_c; |
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} |
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#if ARCH_X86 |
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ff_framerate_init_x86(s); |
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#endif |
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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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FrameRateContext *s = ctx->priv; |
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const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format); |
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int plane; |
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s->vsub = pix_desc->log2_chroma_h; |
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for (plane = 0; plane < 4; plane++) { |
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s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w, plane); |
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s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? s->vsub : 0); |
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} |
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s->bitdepth = pix_desc->comp[0].depth; |
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s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16); |
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if (!s->sad) |
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return AVERROR(EINVAL); |
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s->srce_time_base = inlink->time_base; |
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ff_framerate_init(s); |
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return 0; |
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} |
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static int activate(AVFilterContext *ctx) |
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{ |
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int ret, status; |
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AVFilterLink *inlink = ctx->inputs[0]; |
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AVFilterLink *outlink = ctx->outputs[0]; |
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FrameRateContext *s = ctx->priv; |
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AVFrame *inpicref; |
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int64_t pts; |
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FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink); |
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retry: |
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ret = process_work_frame(ctx); |
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if (ret < 0) |
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return ret; |
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else if (ret == 1) |
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return ff_filter_frame(outlink, s->work); |
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ret = ff_inlink_consume_frame(inlink, &inpicref); |
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if (ret < 0) |
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return ret; |
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if (inpicref) { |
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if (inpicref->flags & AV_FRAME_FLAG_INTERLACED) |
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av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n"); |
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if (inpicref->pts == AV_NOPTS_VALUE) { |
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av_log(ctx, AV_LOG_WARNING, "Ignoring frame without PTS.\n"); |
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av_frame_free(&inpicref); |
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} |
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} |
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if (inpicref) { |
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pts = av_rescale_q(inpicref->pts, s->srce_time_base, s->dest_time_base); |
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if (s->f1 && pts == s->pts1) { |
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av_log(ctx, AV_LOG_WARNING, "Ignoring frame with same PTS.\n"); |
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av_frame_free(&inpicref); |
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} |
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} |
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if (inpicref) { |
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av_frame_free(&s->f0); |
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s->f0 = s->f1; |
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s->pts0 = s->pts1; |
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s->f1 = inpicref; |
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s->pts1 = pts; |
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s->delta = s->pts1 - s->pts0; |
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s->score = -1.0; |
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if (s->delta < 0) { |
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av_log(ctx, AV_LOG_WARNING, "PTS discontinuity.\n"); |
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s->start_pts = s->pts1; |
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s->n = 0; |
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av_frame_free(&s->f0); |
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} |
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if (s->start_pts == AV_NOPTS_VALUE) |
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s->start_pts = s->pts1; |
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goto retry; |
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} |
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if (ff_inlink_acknowledge_status(inlink, &status, &pts)) { |
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if (!s->flush) { |
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s->flush = 1; |
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goto retry; |
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} |
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ff_outlink_set_status(outlink, status, pts); |
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return 0; |
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} |
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FF_FILTER_FORWARD_WANTED(outlink, inlink); |
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return FFERROR_NOT_READY; |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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FilterLink *l = ff_filter_link(outlink); |
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FrameRateContext *s = ctx->priv; |
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int exact; |
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ff_dlog(ctx, "config_output()\n"); |
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ff_dlog(ctx, |
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"config_output() input time base:%u/%u (%f)\n", |
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ctx->inputs[0]->time_base.num,ctx->inputs[0]->time_base.den, |
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av_q2d(ctx->inputs[0]->time_base)); |
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// make sure timebase is small enough to hold the framerate |
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exact = av_reduce(&s->dest_time_base.num, &s->dest_time_base.den, |
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av_gcd((int64_t)s->srce_time_base.num * s->dest_frame_rate.num, |
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(int64_t)s->srce_time_base.den * s->dest_frame_rate.den ), |
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(int64_t)s->srce_time_base.den * s->dest_frame_rate.num, INT_MAX); |
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av_log(ctx, AV_LOG_INFO, |
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"time base:%u/%u -> %u/%u exact:%d\n", |
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s->srce_time_base.num, s->srce_time_base.den, |
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s->dest_time_base.num, s->dest_time_base.den, exact); |
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if (!exact) { |
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av_log(ctx, AV_LOG_WARNING, "Timebase conversion is not exact\n"); |
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} |
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l->frame_rate = s->dest_frame_rate; |
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outlink->time_base = s->dest_time_base; |
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ff_dlog(ctx, |
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"config_output() output time base:%u/%u (%f) w:%d h:%d\n", |
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outlink->time_base.num, outlink->time_base.den, |
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av_q2d(outlink->time_base), |
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outlink->w, outlink->h); |
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av_log(ctx, AV_LOG_INFO, "fps -> fps:%u/%u scene score:%f interpolate start:%d end:%d\n", |
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s->dest_frame_rate.num, s->dest_frame_rate.den, |
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s->scene_score, s->interp_start, s->interp_end); |
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return 0; |
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} |
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static const AVFilterPad framerate_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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}, |
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}; |
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static const AVFilterPad framerate_outputs[] = { |
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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_output, |
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}, |
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}; |
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const AVFilter ff_vf_framerate = { |
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.name = "framerate", |
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.description = NULL_IF_CONFIG_SMALL("Upsamples or downsamples progressive source between specified frame rates."), |
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.priv_size = sizeof(FrameRateContext), |
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.priv_class = &framerate_class, |
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.init = init, |
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.uninit = uninit, |
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FILTER_INPUTS(framerate_inputs), |
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FILTER_OUTPUTS(framerate_outputs), |
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FILTER_PIXFMTS_ARRAY(pix_fmts), |
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.flags = AVFILTER_FLAG_SLICE_THREADS, |
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.activate = activate, |
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};
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