FFmpeg/libavfilter/vf_framerate.c
Marton Balint 6d3b70c27e avfilter/vf_framerate: fix infinite loop with 1-frame input
Fixes infinite loop in:
ffmpeg -f lavfi -i testsrc=d=0.04 -vf framerate=50 -f null none

Signed-off-by: Marton Balint <cus@passwd.hu>
2020-12-27 11:01:41 +01:00

457 lines
15 KiB
C

/*
* Copyright (C) 2012 Mark Himsley
*
* get_scene_score() Copyright (c) 2011 Stefano Sabatini
* taken from libavfilter/vf_select.c
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* filter for upsampling or downsampling a progressive source
*/
#define DEBUG
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
#include "filters.h"
#include "framerate.h"
#include "scene_sad.h"
#define OFFSET(x) offsetof(FrameRateContext, x)
#define V AV_OPT_FLAG_VIDEO_PARAM
#define F AV_OPT_FLAG_FILTERING_PARAM
#define FRAMERATE_FLAG_SCD 01
static const AVOption framerate_options[] = {
{"fps", "required output frames per second rate", OFFSET(dest_frame_rate), AV_OPT_TYPE_VIDEO_RATE, {.str="50"}, 0, INT_MAX, V|F },
{"interp_start", "point to start linear interpolation", OFFSET(interp_start), AV_OPT_TYPE_INT, {.i64=15}, 0, 255, V|F },
{"interp_end", "point to end linear interpolation", OFFSET(interp_end), AV_OPT_TYPE_INT, {.i64=240}, 0, 255, V|F },
{"scene", "scene change level", OFFSET(scene_score), AV_OPT_TYPE_DOUBLE, {.dbl=8.2}, 0, 100., V|F },
{"flags", "set flags", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64=1}, 0, INT_MAX, V|F, "flags" },
{"scene_change_detect", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
{"scd", "enable scene change detection", 0, AV_OPT_TYPE_CONST, {.i64=FRAMERATE_FLAG_SCD}, INT_MIN, INT_MAX, V|F, "flags" },
{NULL}
};
AVFILTER_DEFINE_CLASS(framerate);
static double get_scene_score(AVFilterContext *ctx, AVFrame *crnt, AVFrame *next)
{
FrameRateContext *s = ctx->priv;
double ret = 0;
ff_dlog(ctx, "get_scene_score()\n");
if (crnt->height == next->height &&
crnt->width == next->width) {
uint64_t sad;
double mafd, diff;
ff_dlog(ctx, "get_scene_score() process\n");
s->sad(crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height, &sad);
emms_c();
mafd = (double)sad * 100.0 / (crnt->width * crnt->height) / (1 << s->bitdepth);
diff = fabs(mafd - s->prev_mafd);
ret = av_clipf(FFMIN(mafd, diff), 0, 100.0);
s->prev_mafd = mafd;
}
ff_dlog(ctx, "get_scene_score() result is:%f\n", ret);
return ret;
}
typedef struct ThreadData {
AVFrame *copy_src1, *copy_src2;
uint16_t src1_factor, src2_factor;
} ThreadData;
static int filter_slice(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
{
FrameRateContext *s = ctx->priv;
ThreadData *td = arg;
AVFrame *work = s->work;
AVFrame *src1 = td->copy_src1;
AVFrame *src2 = td->copy_src2;
uint16_t src1_factor = td->src1_factor;
uint16_t src2_factor = td->src2_factor;
int plane;
for (plane = 0; plane < 4 && src1->data[plane] && src2->data[plane]; plane++) {
const int start = (s->height[plane] * job ) / nb_jobs;
const int end = (s->height[plane] * (job+1)) / nb_jobs;
uint8_t *src1_data = src1->data[plane] + start * src1->linesize[plane];
uint8_t *src2_data = src2->data[plane] + start * src2->linesize[plane];
uint8_t *dst_data = work->data[plane] + start * work->linesize[plane];
s->blend(src1_data, src1->linesize[plane], src2_data, src2->linesize[plane],
dst_data, work->linesize[plane], s->line_size[plane], end - start,
src1_factor, src2_factor, s->blend_factor_max >> 1);
}
return 0;
}
static int blend_frames(AVFilterContext *ctx, int interpolate)
{
FrameRateContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
double interpolate_scene_score = 0;
if ((s->flags & FRAMERATE_FLAG_SCD)) {
if (s->score >= 0.0)
interpolate_scene_score = s->score;
else
interpolate_scene_score = s->score = get_scene_score(ctx, s->f0, s->f1);
ff_dlog(ctx, "blend_frames() interpolate scene score:%f\n", interpolate_scene_score);
}
// decide if the shot-change detection allows us to blend two frames
if (interpolate_scene_score < s->scene_score) {
ThreadData td;
td.copy_src1 = s->f0;
td.copy_src2 = s->f1;
td.src2_factor = interpolate;
td.src1_factor = s->blend_factor_max - td.src2_factor;
// get work-space for output frame
s->work = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!s->work)
return AVERROR(ENOMEM);
av_frame_copy_props(s->work, s->f0);
ff_dlog(ctx, "blend_frames() INTERPOLATE to create work frame\n");
ctx->internal->execute(ctx, filter_slice, &td, NULL, FFMIN(FFMAX(1, outlink->h >> 2), ff_filter_get_nb_threads(ctx)));
return 1;
}
return 0;
}
static int process_work_frame(AVFilterContext *ctx)
{
FrameRateContext *s = ctx->priv;
int64_t work_pts;
int64_t interpolate, interpolate8;
int ret;
if (!s->f1)
return 0;
if (!s->f0 && !s->flush)
return 0;
work_pts = s->start_pts + av_rescale_q(s->n, av_inv_q(s->dest_frame_rate), s->dest_time_base);
if (work_pts >= s->pts1 && !s->flush)
return 0;
if (!s->f0) {
av_assert1(s->flush);
s->work = s->f1;
s->f1 = NULL;
} else {
if (work_pts >= s->pts1 + s->delta && s->flush)
return 0;
interpolate = av_rescale(work_pts - s->pts0, s->blend_factor_max, s->delta);
interpolate8 = av_rescale(work_pts - s->pts0, 256, s->delta);
ff_dlog(ctx, "process_work_frame() interpolate: %"PRId64"/256\n", interpolate8);
if (interpolate >= s->blend_factor_max || interpolate8 > s->interp_end) {
s->work = av_frame_clone(s->f1);
} else if (interpolate <= 0 || interpolate8 < s->interp_start) {
s->work = av_frame_clone(s->f0);
} else {
ret = blend_frames(ctx, interpolate);
if (ret < 0)
return ret;
if (ret == 0)
s->work = av_frame_clone(interpolate > (s->blend_factor_max >> 1) ? s->f1 : s->f0);
}
}
if (!s->work)
return AVERROR(ENOMEM);
s->work->pts = work_pts;
s->n++;
return 1;
}
static av_cold int init(AVFilterContext *ctx)
{
FrameRateContext *s = ctx->priv;
s->start_pts = AV_NOPTS_VALUE;
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
FrameRateContext *s = ctx->priv;
av_frame_free(&s->f0);
av_frame_free(&s->f1);
}
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_YUV420P9, AV_PIX_FMT_YUV420P10, AV_PIX_FMT_YUV420P12,
AV_PIX_FMT_YUV422P9, AV_PIX_FMT_YUV422P10, AV_PIX_FMT_YUV422P12,
AV_PIX_FMT_YUV444P9, AV_PIX_FMT_YUV444P10, AV_PIX_FMT_YUV444P12,
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);
}
#define BLEND_FRAME_FUNC(nbits) \
static void blend_frames##nbits##_c(BLEND_FUNC_PARAMS) \
{ \
int line, pixel; \
uint##nbits##_t *dstw = (uint##nbits##_t *)dst; \
uint##nbits##_t *src1w = (uint##nbits##_t *)src1; \
uint##nbits##_t *src2w = (uint##nbits##_t *)src2; \
int bytes = nbits / 8; \
width /= bytes; \
src1_linesize /= bytes; \
src2_linesize /= bytes; \
dst_linesize /= bytes; \
for (line = 0; line < height; line++) { \
for (pixel = 0; pixel < width; pixel++) \
dstw[pixel] = ((src1w[pixel] * factor1) + \
(src2w[pixel] * factor2) + half) \
>> BLEND_FACTOR_DEPTH(nbits); \
src1w += src1_linesize; \
src2w += src2_linesize; \
dstw += dst_linesize; \
} \
}
BLEND_FRAME_FUNC(8)
BLEND_FRAME_FUNC(16)
void ff_framerate_init(FrameRateContext *s)
{
if (s->bitdepth == 8) {
s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(8);
s->blend = blend_frames8_c;
} else {
s->blend_factor_max = 1 << BLEND_FACTOR_DEPTH(16);
s->blend = blend_frames16_c;
}
if (ARCH_X86)
ff_framerate_init_x86(s);
}
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;
s->vsub = pix_desc->log2_chroma_h;
for (plane = 0; plane < 4; plane++) {
s->line_size[plane] = av_image_get_linesize(inlink->format, inlink->w, plane);
s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? s->vsub : 0);
}
s->bitdepth = pix_desc->comp[0].depth;
s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16);
if (!s->sad)
return AVERROR(EINVAL);
s->srce_time_base = inlink->time_base;
ff_framerate_init(s);
return 0;
}
static int activate(AVFilterContext *ctx)
{
int ret, status;
AVFilterLink *inlink = ctx->inputs[0];
AVFilterLink *outlink = ctx->outputs[0];
FrameRateContext *s = ctx->priv;
AVFrame *inpicref;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
retry:
ret = process_work_frame(ctx);
if (ret < 0)
return ret;
else if (ret == 1)
return ff_filter_frame(outlink, s->work);
ret = ff_inlink_consume_frame(inlink, &inpicref);
if (ret < 0)
return ret;
if (inpicref) {
if (inpicref->interlaced_frame)
av_log(ctx, AV_LOG_WARNING, "Interlaced frame found - the output will not be correct.\n");
if (inpicref->pts == AV_NOPTS_VALUE) {
av_log(ctx, AV_LOG_WARNING, "Ignoring frame without PTS.\n");
av_frame_free(&inpicref);
}
}
if (inpicref) {
pts = av_rescale_q(inpicref->pts, s->srce_time_base, s->dest_time_base);
if (s->f1 && pts == s->pts1) {
av_log(ctx, AV_LOG_WARNING, "Ignoring frame with same PTS.\n");
av_frame_free(&inpicref);
}
}
if (inpicref) {
av_frame_free(&s->f0);
s->f0 = s->f1;
s->pts0 = s->pts1;
s->f1 = inpicref;
s->pts1 = pts;
s->delta = s->pts1 - s->pts0;
s->score = -1.0;
if (s->delta < 0) {
av_log(ctx, AV_LOG_WARNING, "PTS discontinuity.\n");
s->start_pts = s->pts1;
s->n = 0;
av_frame_free(&s->f0);
}
if (s->start_pts == AV_NOPTS_VALUE)
s->start_pts = s->pts1;
goto retry;
}
if (ff_inlink_acknowledge_status(inlink, &status, &pts)) {
if (!s->flush) {
s->flush = 1;
goto retry;
}
ff_outlink_set_status(outlink, status, pts);
return 0;
}
FF_FILTER_FORWARD_WANTED(outlink, inlink);
return FFERROR_NOT_READY;
}
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;
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 const AVFilterPad framerate_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_input,
},
{ NULL }
};
static const AVFilterPad framerate_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.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,
.flags = AVFILTER_FLAG_SLICE_THREADS,
.activate = activate,
};