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FFmpeg/libavfilter/vf_decimate.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

464 lines
17 KiB
C

/*
* Copyright (c) 2012 Fredrik Mellbin
* Copyright (c) 2013 Clément Bœsch
*
* 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/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "avfilter.h"
#include "filters.h"
#include "internal.h"
#define INPUT_MAIN 0
#define INPUT_CLEANSRC 1
struct qitem {
AVFrame *frame;
int64_t maxbdiff;
int64_t totdiff;
};
typedef struct DecimateContext {
const AVClass *class;
struct qitem *queue; ///< window of cycle frames and the associated data diff
int fid; ///< current frame id in the queue
int filled; ///< 1 if the queue is filled, 0 otherwise
AVFrame *last; ///< last frame from the previous queue
AVFrame **clean_src; ///< frame queue for the clean source
int got_frame[2]; ///< frame request flag for each input stream
int64_t last_pts; ///< last output timestamp
int64_t last_duration; ///< last output duration
int64_t start_pts; ///< base for output timestamps
uint32_t eof; ///< bitmask for end of stream
int hsub, vsub; ///< chroma subsampling values
int depth;
int nxblocks, nyblocks;
int bdiffsize;
int64_t *bdiffs;
AVRational in_tb; // input time-base
AVRational nondec_tb; // non-decimated time-base
AVRational dec_tb; // decimated time-base
/* options */
int cycle;
double dupthresh_flt;
double scthresh_flt;
int64_t dupthresh;
int64_t scthresh;
int blockx, blocky;
int ppsrc;
int chroma;
int mixed;
} DecimateContext;
#define OFFSET(x) offsetof(DecimateContext, x)
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
static const AVOption decimate_options[] = {
{ "cycle", "set the number of frame from which one will be dropped", OFFSET(cycle), AV_OPT_TYPE_INT, {.i64 = 5}, 2, 25, FLAGS },
{ "dupthresh", "set duplicate threshold", OFFSET(dupthresh_flt), AV_OPT_TYPE_DOUBLE, {.dbl = 1.1}, 0, 100, FLAGS },
{ "scthresh", "set scene change threshold", OFFSET(scthresh_flt), AV_OPT_TYPE_DOUBLE, {.dbl = 15.0}, 0, 100, FLAGS },
{ "blockx", "set the size of the x-axis blocks used during metric calculations", OFFSET(blockx), AV_OPT_TYPE_INT, {.i64 = 32}, 4, 1<<9, FLAGS },
{ "blocky", "set the size of the y-axis blocks used during metric calculations", OFFSET(blocky), AV_OPT_TYPE_INT, {.i64 = 32}, 4, 1<<9, FLAGS },
{ "ppsrc", "mark main input as a pre-processed input and activate clean source input stream", OFFSET(ppsrc), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ "chroma", "set whether or not chroma is considered in the metric calculations", OFFSET(chroma), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, FLAGS },
{ "mixed", "set whether or not the input only partially contains content to be decimated", OFFSET(mixed), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, FLAGS },
{ NULL }
};
AVFILTER_DEFINE_CLASS(decimate);
static void calc_diffs(const DecimateContext *dm, struct qitem *q,
const AVFrame *f1, const AVFrame *f2)
{
int64_t maxdiff = -1;
int64_t *bdiffs = dm->bdiffs;
int plane, i, j;
memset(bdiffs, 0, dm->bdiffsize * sizeof(*bdiffs));
for (plane = 0; plane < (dm->chroma && f1->data[2] ? 3 : 1); plane++) {
int x, y, xl;
const int linesize1 = f1->linesize[plane];
const int linesize2 = f2->linesize[plane];
const uint8_t *f1p = f1->data[plane];
const uint8_t *f2p = f2->data[plane];
int width = plane ? AV_CEIL_RSHIFT(f1->width, dm->hsub) : f1->width;
int height = plane ? AV_CEIL_RSHIFT(f1->height, dm->vsub) : f1->height;
int hblockx = dm->blockx / 2;
int hblocky = dm->blocky / 2;
if (plane) {
hblockx >>= dm->hsub;
hblocky >>= dm->vsub;
}
for (y = 0; y < height; y++) {
int ydest = y / hblocky;
int xdest = 0;
#define CALC_DIFF(nbits) do { \
for (x = 0; x < width; x += hblockx) { \
int64_t acc = 0; \
int m = FFMIN(width, x + hblockx); \
for (xl = x; xl < m; xl++) \
acc += abs(((const uint##nbits##_t *)f1p)[xl] - \
((const uint##nbits##_t *)f2p)[xl]); \
bdiffs[ydest * dm->nxblocks + xdest] += acc; \
xdest++; \
} \
} while (0)
if (dm->depth == 8) CALC_DIFF(8);
else CALC_DIFF(16);
f1p += linesize1;
f2p += linesize2;
}
}
for (i = 0; i < dm->nyblocks - 1; i++) {
for (j = 0; j < dm->nxblocks - 1; j++) {
int64_t tmp = bdiffs[ i * dm->nxblocks + j ]
+ bdiffs[ i * dm->nxblocks + j + 1]
+ bdiffs[(i + 1) * dm->nxblocks + j ]
+ bdiffs[(i + 1) * dm->nxblocks + j + 1];
if (tmp > maxdiff)
maxdiff = tmp;
}
}
q->totdiff = 0;
for (i = 0; i < dm->bdiffsize; i++)
q->totdiff += bdiffs[i];
q->maxbdiff = maxdiff;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
int scpos = -1, duppos = -1;
int drop = INT_MIN, i, lowest = 0, ret;
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
DecimateContext *dm = ctx->priv;
AVFrame *prv;
/* update frames queue(s) */
if (FF_INLINK_IDX(inlink) == INPUT_MAIN) {
dm->queue[dm->fid].frame = in;
dm->got_frame[INPUT_MAIN] = 1;
} else {
dm->clean_src[dm->fid] = in;
dm->got_frame[INPUT_CLEANSRC] = 1;
}
if (!dm->got_frame[INPUT_MAIN] || (dm->ppsrc && !dm->got_frame[INPUT_CLEANSRC]))
return 0;
dm->got_frame[INPUT_MAIN] = dm->got_frame[INPUT_CLEANSRC] = 0;
if (dm->ppsrc)
in = dm->queue[dm->fid].frame;
if (in) {
/* update frame metrics */
prv = dm->fid ? dm->queue[dm->fid - 1].frame : dm->last;
if (!prv) {
dm->queue[dm->fid].maxbdiff = INT64_MAX;
dm->queue[dm->fid].totdiff = INT64_MAX;
} else {
calc_diffs(dm, &dm->queue[dm->fid], prv, in);
}
if (++dm->fid != dm->cycle)
return 0;
av_frame_free(&dm->last);
dm->last = av_frame_clone(in);
dm->fid = 0;
/* we have a complete cycle, select the frame to drop */
lowest = 0;
for (i = 0; i < dm->cycle; i++) {
if (dm->queue[i].totdiff > dm->scthresh)
scpos = i;
if (dm->queue[i].maxbdiff < dm->queue[lowest].maxbdiff)
lowest = i;
}
if (dm->queue[lowest].maxbdiff < dm->dupthresh)
duppos = lowest;
if (dm->mixed && duppos < 0) {
drop = -1; // no drop if mixed content + no frame in cycle below threshold
} else {
drop = scpos >= 0 && duppos < 0 ? scpos : lowest;
}
}
/* metrics debug */
if (av_log_get_level() >= AV_LOG_DEBUG) {
av_log(ctx, AV_LOG_DEBUG, "1/%d frame drop:\n", dm->cycle);
for (i = 0; i < dm->cycle && dm->queue[i].frame; i++) {
av_log(ctx, AV_LOG_DEBUG," #%d: totdiff=%08"PRIx64" maxbdiff=%08"PRIx64"%s%s%s%s\n",
i + 1, dm->queue[i].totdiff, dm->queue[i].maxbdiff,
i == scpos ? " sc" : "",
i == duppos ? " dup" : "",
i == lowest ? " lowest" : "",
i == drop ? " [DROP]" : "");
}
}
/* push all frames except the drop */
ret = 0;
for (i = 0; i < dm->cycle && dm->queue[i].frame; i++) {
if (i == drop) {
if (dm->ppsrc)
av_frame_free(&dm->clean_src[i]);
av_frame_free(&dm->queue[i].frame);
} else {
AVFrame *frame = dm->queue[i].frame;
dm->queue[i].frame = NULL;
if (frame->pts != AV_NOPTS_VALUE && dm->start_pts == AV_NOPTS_VALUE)
dm->start_pts = av_rescale_q(frame->pts, dm->in_tb, outlink->time_base);
if (dm->ppsrc) {
av_frame_free(&frame);
frame = dm->clean_src[i];
if (!frame)
continue;
dm->clean_src[i] = NULL;
}
frame->pts = dm->last_duration ? dm->last_pts + dm->last_duration :
(dm->start_pts == AV_NOPTS_VALUE ? 0 : dm->start_pts);
frame->duration = dm->mixed ? av_div_q(drop < 0 ? dm->nondec_tb : dm->dec_tb, outlink->time_base).num : 1;
dm->last_duration = frame->duration;
dm->last_pts = frame->pts;
ret = ff_filter_frame(outlink, frame);
if (ret < 0)
break;
}
}
return ret;
}
static int activate(AVFilterContext *ctx)
{
DecimateContext *dm = ctx->priv;
AVFrame *frame = NULL;
int ret = 0, status;
int64_t pts;
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
if ((dm->got_frame[INPUT_MAIN] == 0) && !(dm->eof & (1 << INPUT_MAIN)) &&
(ret = ff_inlink_consume_frame(ctx->inputs[INPUT_MAIN], &frame)) > 0) {
ret = filter_frame(ctx->inputs[INPUT_MAIN], frame);
if (ret < 0)
return ret;
}
if (ret < 0)
return ret;
if (dm->ppsrc &&
(dm->got_frame[INPUT_CLEANSRC] == 0) && !(dm->eof & (1 << INPUT_CLEANSRC)) &&
(ret = ff_inlink_consume_frame(ctx->inputs[INPUT_CLEANSRC], &frame)) > 0) {
ret = filter_frame(ctx->inputs[INPUT_CLEANSRC], frame);
if (ret < 0)
return ret;
}
if (ret < 0) {
return ret;
} else if (dm->eof == ((1 << INPUT_MAIN) | (dm->ppsrc << INPUT_CLEANSRC))) {
ff_outlink_set_status(ctx->outputs[0], AVERROR_EOF, dm->last_pts);
return 0;
} else if (!(dm->eof & (1 << INPUT_MAIN)) && ff_inlink_acknowledge_status(ctx->inputs[INPUT_MAIN], &status, &pts)) {
if (status == AVERROR_EOF) { // flushing
dm->eof |= 1 << INPUT_MAIN;
if (dm->ppsrc)
filter_frame(ctx->inputs[INPUT_CLEANSRC], NULL);
filter_frame(ctx->inputs[INPUT_MAIN], NULL);
ff_outlink_set_status(ctx->outputs[0], AVERROR_EOF, dm->last_pts);
return 0;
}
} else if (dm->ppsrc && !(dm->eof & (1 << INPUT_CLEANSRC)) && ff_inlink_acknowledge_status(ctx->inputs[INPUT_CLEANSRC], &status, &pts)) {
if (status == AVERROR_EOF) { // flushing
dm->eof |= 1 << INPUT_CLEANSRC;
filter_frame(ctx->inputs[INPUT_MAIN], NULL);
filter_frame(ctx->inputs[INPUT_CLEANSRC], NULL);
ff_outlink_set_status(ctx->outputs[0], AVERROR_EOF, dm->last_pts);
return 0;
}
}
if (ff_inlink_queued_frames(ctx->inputs[INPUT_MAIN]) > 0 && (!dm->ppsrc ||
(dm->ppsrc && ff_inlink_queued_frames(ctx->inputs[INPUT_CLEANSRC]) > 0))) {
ff_filter_set_ready(ctx, 100);
} else if (ff_outlink_frame_wanted(ctx->outputs[0])) {
if (dm->got_frame[INPUT_MAIN] == 0)
ff_inlink_request_frame(ctx->inputs[INPUT_MAIN]);
if (dm->ppsrc && (dm->got_frame[INPUT_CLEANSRC] == 0))
ff_inlink_request_frame(ctx->inputs[INPUT_CLEANSRC]);
}
return 0;
}
static av_cold int decimate_init(AVFilterContext *ctx)
{
DecimateContext *dm = ctx->priv;
AVFilterPad pad = {
.name = "main",
.type = AVMEDIA_TYPE_VIDEO,
};
int ret;
if ((ret = ff_append_inpad(ctx, &pad)) < 0)
return ret;
if (dm->ppsrc) {
pad.name = "clean_src";
pad.config_props = NULL;
if ((ret = ff_append_inpad(ctx, &pad)) < 0)
return ret;
}
if ((dm->blockx & (dm->blockx - 1)) ||
(dm->blocky & (dm->blocky - 1))) {
av_log(ctx, AV_LOG_ERROR, "blockx and blocky settings must be power of two\n");
return AVERROR(EINVAL);
}
dm->start_pts = AV_NOPTS_VALUE;
dm->last_duration = 0;
return 0;
}
static av_cold void decimate_uninit(AVFilterContext *ctx)
{
int i;
DecimateContext *dm = ctx->priv;
av_frame_free(&dm->last);
av_freep(&dm->bdiffs);
if (dm->queue) {
for (i = 0; i < dm->cycle; i++)
av_frame_free(&dm->queue[i].frame);
}
av_freep(&dm->queue);
if (dm->clean_src) {
for (i = 0; i < dm->cycle; i++)
av_frame_free(&dm->clean_src[i]);
}
av_freep(&dm->clean_src);
}
static const enum AVPixelFormat pix_fmts[] = {
#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf
#define PF_ALPHA(suf) AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf
#define PF(suf) PF_NOALPHA(suf), PF_ALPHA(suf)
PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16),
AV_PIX_FMT_YUV440P10, AV_PIX_FMT_YUV440P12,
AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P,
AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P,
AV_PIX_FMT_YUVJ411P,
AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14,
AV_PIX_FMT_GRAY16,
AV_PIX_FMT_NONE
};
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
DecimateContext *dm = ctx->priv;
const AVFilterLink *inlink = ctx->inputs[INPUT_MAIN];
AVRational fps = inlink->frame_rate;
int max_value;
const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
const int w = inlink->w;
const int h = inlink->h;
dm->hsub = pix_desc->log2_chroma_w;
dm->vsub = pix_desc->log2_chroma_h;
dm->depth = pix_desc->comp[0].depth;
max_value = (1 << dm->depth) - 1;
dm->scthresh = (int64_t)(((int64_t)max_value * w * h * dm->scthresh_flt) / 100);
dm->dupthresh = (int64_t)(((int64_t)max_value * dm->blockx * dm->blocky * dm->dupthresh_flt) / 100);
dm->nxblocks = (w + dm->blockx/2 - 1) / (dm->blockx/2);
dm->nyblocks = (h + dm->blocky/2 - 1) / (dm->blocky/2);
dm->bdiffsize = dm->nxblocks * dm->nyblocks;
dm->bdiffs = av_malloc_array(dm->bdiffsize, sizeof(*dm->bdiffs));
dm->queue = av_calloc(dm->cycle, sizeof(*dm->queue));
dm->in_tb = inlink->time_base;
dm->nondec_tb = av_inv_q(fps);
dm->dec_tb = av_mul_q(dm->nondec_tb, (AVRational){dm->cycle, dm->cycle - 1});
if (!dm->bdiffs || !dm->queue)
return AVERROR(ENOMEM);
if (dm->ppsrc) {
dm->clean_src = av_calloc(dm->cycle, sizeof(*dm->clean_src));
if (!dm->clean_src)
return AVERROR(ENOMEM);
}
if (!fps.num || !fps.den) {
av_log(ctx, AV_LOG_ERROR, "The input needs a constant frame rate; "
"current rate of %d/%d is invalid\n", fps.num, fps.den);
return AVERROR(EINVAL);
}
if (dm->mixed) {
outlink->time_base = av_gcd_q(dm->nondec_tb, dm->dec_tb, AV_TIME_BASE / 2, AV_TIME_BASE_Q);
av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> VFR (use %d/%d if CFR required)\n",
fps.num, fps.den, outlink->time_base.den, outlink->time_base.num);
} else {
outlink->time_base = dm->dec_tb;
outlink->frame_rate = av_inv_q(outlink->time_base);
av_log(ctx, AV_LOG_VERBOSE, "FPS: %d/%d -> %d/%d\n",
fps.num, fps.den, outlink->frame_rate.num, outlink->frame_rate.den);
}
outlink->sample_aspect_ratio = inlink->sample_aspect_ratio;
if (dm->ppsrc) {
outlink->w = ctx->inputs[INPUT_CLEANSRC]->w;
outlink->h = ctx->inputs[INPUT_CLEANSRC]->h;
} else {
outlink->w = inlink->w;
outlink->h = inlink->h;
}
return 0;
}
static const AVFilterPad decimate_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.config_props = config_output,
},
};
const AVFilter ff_vf_decimate = {
.name = "decimate",
.description = NULL_IF_CONFIG_SMALL("Decimate frames (post field matching filter)."),
.init = decimate_init,
.activate = activate,
.uninit = decimate_uninit,
.priv_size = sizeof(DecimateContext),
FILTER_OUTPUTS(decimate_outputs),
FILTER_PIXFMTS_ARRAY(pix_fmts),
.priv_class = &decimate_class,
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
};