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/*
* Copyright (c) 2013 Georg Martius <georg dot martius at web dot de>
*
* 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
*/
#define DEFAULT_RESULT_NAME "transforms.trf"
#include <vid.stab/libvidstab.h>
#include "libavutil/common.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "avfilter.h"
#include "internal.h"
#include "vidstabutils.h"
typedef struct StabData {
const AVClass *class;
VSMotionDetect md;
VSMotionDetectConfig conf;
char *result;
FILE *f;
} StabData;
#define OFFSET(x) offsetof(StabData, x)
#define OFFSETC(x) (offsetof(StabData, conf)+offsetof(VSMotionDetectConfig, x))
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
static const AVOption vidstabdetect_options[] = {
{"result", "path to the file used to write the transforms", OFFSET(result), AV_OPT_TYPE_STRING, {.str = DEFAULT_RESULT_NAME}, .flags = FLAGS},
{"shakiness", "how shaky is the video and how quick is the camera?"
" 1: little (fast) 10: very strong/quick (slow)", OFFSETC(shakiness), AV_OPT_TYPE_INT, {.i64 = 5}, 1, 10, FLAGS},
{"accuracy", "(>=shakiness) 1: low 15: high (slow)", OFFSETC(accuracy), AV_OPT_TYPE_INT, {.i64 = 15}, 1, 15, FLAGS},
{"stepsize", "region around minimum is scanned with 1 pixel resolution", OFFSETC(stepSize), AV_OPT_TYPE_INT, {.i64 = 6}, 1, 32, FLAGS},
{"mincontrast", "below this contrast a field is discarded (0-1)", OFFSETC(contrastThreshold), AV_OPT_TYPE_DOUBLE, {.dbl = 0.25}, 0.0, 1.0, FLAGS},
{"show", "0: draw nothing; 1,2: show fields and transforms", OFFSETC(show), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 2, FLAGS},
{"tripod", "virtual tripod mode (if >0): motion is compared to a reference"
" reference frame (frame # is the value)", OFFSETC(virtualTripod), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS},
{NULL}
};
AVFILTER_DEFINE_CLASS(vidstabdetect);
static av_cold int init(AVFilterContext *ctx)
{
StabData *s = ctx->priv;
ff_vs_init();
s->class = &vidstabdetect_class;
av_log(ctx, AV_LOG_VERBOSE, "vidstabdetect filter: init %s\n", LIBVIDSTAB_VERSION);
return 0;
}
static av_cold void uninit(AVFilterContext *ctx)
{
StabData *s = ctx->priv;
VSMotionDetect *md = &(s->md);
if (s->f) {
fclose(s->f);
s->f = NULL;
}
vsMotionDetectionCleanup(md);
}
static int config_input(AVFilterLink *inlink)
{
AVFilterContext *ctx = inlink->dst;
StabData *s = ctx->priv;
VSMotionDetect* md = &(s->md);
VSFrameInfo fi;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
int is_planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;
vsFrameInfoInit(&fi, inlink->w, inlink->h,
ff_av2vs_pixfmt(ctx, inlink->format));
if (!is_planar && fi.bytesPerPixel != av_get_bits_per_pixel(desc)/8) {
av_log(ctx, AV_LOG_ERROR, "pixel-format error: wrong bits/per/pixel, please report a BUG");
return AVERROR(EINVAL);
}
if (fi.log2ChromaW != desc->log2_chroma_w) {
av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_w, please report a BUG");
return AVERROR(EINVAL);
}
if (fi.log2ChromaH != desc->log2_chroma_h) {
av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_h, please report a BUG");
return AVERROR(EINVAL);
}
// set values that are not initialized by the options
s->conf.algo = 1;
s->conf.modName = "vidstabdetect";
if (vsMotionDetectInit(md, &s->conf, &fi) != VS_OK) {
av_log(ctx, AV_LOG_ERROR, "initialization of Motion Detection failed, please report a BUG");
return AVERROR(EINVAL);
}
vsMotionDetectGetConfig(&s->conf, md);
av_log(ctx, AV_LOG_INFO, "Video stabilization settings (pass 1/2):\n");
av_log(ctx, AV_LOG_INFO, " shakiness = %d\n", s->conf.shakiness);
av_log(ctx, AV_LOG_INFO, " accuracy = %d\n", s->conf.accuracy);
av_log(ctx, AV_LOG_INFO, " stepsize = %d\n", s->conf.stepSize);
av_log(ctx, AV_LOG_INFO, " mincontrast = %f\n", s->conf.contrastThreshold);
av_log(ctx, AV_LOG_INFO, " tripod = %d\n", s->conf.virtualTripod);
av_log(ctx, AV_LOG_INFO, " show = %d\n", s->conf.show);
av_log(ctx, AV_LOG_INFO, " result = %s\n", s->result);
s->f = avpriv_fopen_utf8(s->result, "w");
if (s->f == NULL) {
av_log(ctx, AV_LOG_ERROR, "cannot open transform file %s\n", s->result);
return AVERROR(EINVAL);
} else {
if (vsPrepareFile(md, s->f) != VS_OK) {
av_log(ctx, AV_LOG_ERROR, "cannot write to transform file %s\n", s->result);
return AVERROR(EINVAL);
}
}
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
AVFilterContext *ctx = inlink->dst;
StabData *s = ctx->priv;
VSMotionDetect *md = &(s->md);
LocalMotions localmotions;
AVFilterLink *outlink = inlink->dst->outputs[0];
VSFrame frame;
int plane;
if (s->conf.show > 0 && !av_frame_is_writable(in))
av_frame_make_writable(in);
for (plane = 0; plane < md->fi.planes; plane++) {
frame.data[plane] = in->data[plane];
frame.linesize[plane] = in->linesize[plane];
}
if (vsMotionDetection(md, &localmotions, &frame) != VS_OK) {
av_log(ctx, AV_LOG_ERROR, "motion detection failed");
return AVERROR(AVERROR_EXTERNAL);
} else {
if (vsWriteToFile(md, s->f, &localmotions) != VS_OK) {
int ret = AVERROR(errno);
av_log(ctx, AV_LOG_ERROR, "cannot write to transform file");
return ret;
}
vs_vector_del(&localmotions);
}
return ff_filter_frame(outlink, in);
}
static const AVFilterPad avfilter_vf_vidstabdetect_inputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
.filter_frame = filter_frame,
.config_props = config_input,
},
};
static const AVFilterPad avfilter_vf_vidstabdetect_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_VIDEO,
},
};
const AVFilter ff_vf_vidstabdetect = {
.name = "vidstabdetect",
.description = NULL_IF_CONFIG_SMALL("Extract relative transformations, "
"pass 1 of 2 for stabilization "
"(see vidstabtransform for pass 2)."),
.priv_size = sizeof(StabData),
.init = init,
.uninit = uninit,
.flags = AVFILTER_FLAG_METADATA_ONLY,
FILTER_INPUTS(avfilter_vf_vidstabdetect_inputs),
FILTER_OUTPUTS(avfilter_vf_vidstabdetect_outputs),
FILTER_PIXFMTS_ARRAY(ff_vidstab_pix_fmts),
.priv_class = &vidstabdetect_class,
};
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