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FFmpeg/libavfilter/vf_shuffleframes.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

161 lines
4.4 KiB
C

/*
* Copyright (c) 2015 Paul B Mahol
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/avstring.h"
#include "libavutil/common.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "avfilter.h"
#include "internal.h"
#include "video.h"
typedef struct ShuffleFramesContext {
const AVClass *class;
char *mapping;
AVFrame **frames;
int *map;
int64_t *pts;
int in_frames;
int nb_frames;
} ShuffleFramesContext;
static av_cold int init(AVFilterContext *ctx)
{
ShuffleFramesContext *s = ctx->priv;
char *mapping, *saveptr = NULL, *p;
int n, nb_items;
nb_items = 1;
for (p = s->mapping; *p; p++) {
if (*p == '|' || *p == ' ')
nb_items++;
}
s->frames = av_calloc(nb_items, sizeof(*s->frames));
s->map = av_calloc(nb_items, sizeof(*s->map));
s->pts = av_calloc(nb_items, sizeof(*s->pts));
if (!s->map || !s->frames || !s->pts) {
return AVERROR(ENOMEM);
}
mapping = av_strdup(s->mapping);
if (!mapping)
return AVERROR(ENOMEM);
for (n = 0; n < nb_items; n++) {
char *map = av_strtok(n == 0 ? mapping : NULL, " |", &saveptr);
if (!map || sscanf(map, "%d", &s->map[n]) != 1) {
av_free(mapping);
return AVERROR(EINVAL);
}
if (s->map[n] < -1 || s->map[n] >= nb_items) {
av_log(ctx, AV_LOG_ERROR, "Index %d out of range: [-1, %d].\n", s->map[n], nb_items - 1);
av_free(mapping);
return AVERROR(EINVAL);
}
}
s->nb_frames = nb_items;
av_free(mapping);
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
{
AVFilterContext *ctx = inlink->dst;
ShuffleFramesContext *s = ctx->priv;
int ret = 0;
if (s->in_frames < s->nb_frames) {
s->frames[s->in_frames] = frame;
s->pts[s->in_frames] = frame->pts;
s->in_frames++;
}
if (s->in_frames == s->nb_frames) {
int n, x;
for (n = 0; n < s->nb_frames; n++) {
AVFrame *out;
x = s->map[n];
if (x >= 0) {
out = av_frame_clone(s->frames[x]);
if (!out)
return AVERROR(ENOMEM);
out->pts = s->pts[n];
ret = ff_filter_frame(ctx->outputs[0], out);
}
s->in_frames--;
}
for (n = 0; n < s->nb_frames; n++)
av_frame_free(&s->frames[n]);
}
return ret;
}
static av_cold void uninit(AVFilterContext *ctx)
{
ShuffleFramesContext *s = ctx->priv;
while (s->in_frames > 0) {
s->in_frames--;
av_frame_free(&s->frames[s->in_frames]);
}
av_freep(&s->frames);
av_freep(&s->map);
av_freep(&s->pts);
}
#define OFFSET(x) offsetof(ShuffleFramesContext, x)
#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
static const AVOption shuffleframes_options[] = {
{ "mapping", "set destination indexes of input frames", OFFSET(mapping), AV_OPT_TYPE_STRING, {.str="0"}, 0, 0, FLAGS },
{ NULL },
};
AVFILTER_DEFINE_CLASS(shuffleframes);
static const AVFilterPad shuffleframes_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
},
};
const AVFilter ff_vf_shuffleframes = {
.name = "shuffleframes",
.description = NULL_IF_CONFIG_SMALL("Shuffle video frames."),
.priv_size = sizeof(ShuffleFramesContext),
.priv_class = &shuffleframes_class,
.init = init,
.uninit = uninit,
FILTER_INPUTS(shuffleframes_inputs),
FILTER_OUTPUTS(ff_video_default_filterpad),
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
};