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https://github.com/FFmpeg/FFmpeg.git
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40e6575aa3
This is more spec-compliant because it does not rely on dead-code elimination by the compiler. Especially MSVC has problems with this, as can be seen in https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/296373.html or https://ffmpeg.org/pipermail/ffmpeg-devel/2022-May/297022.html This commit does not eliminate every instance where we rely on dead code elimination: It only tackles branching to the initialization of arch-specific dsp code, not e.g. all uses of CONFIG_ and HAVE_ checks. But maybe it is already enough to compile FFmpeg with MSVC with whole-programm-optimizations enabled (if one does not disable too many components). Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
449 lines
15 KiB
C
449 lines
15 KiB
C
/*
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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 "internal.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, "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 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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emms_c();
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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->interlaced_frame)
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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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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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outlink->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,
|
|
.uninit = uninit,
|
|
FILTER_INPUTS(framerate_inputs),
|
|
FILTER_OUTPUTS(framerate_outputs),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
.flags = AVFILTER_FLAG_SLICE_THREADS,
|
|
.activate = activate,
|
|
};
|