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-rw-r--r--libavfilter/vf_vidstabdetect.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/libavfilter/vf_vidstabdetect.c b/libavfilter/vf_vidstabdetect.c
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+++ b/libavfilter/vf_vidstabdetect.c
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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 {
+ 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 *sd = ctx->priv;
+ vs_set_mem_and_log_functions();
+ sd->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 *sd = ctx->priv;
+ VSMotionDetect *md = &(sd->md);
+
+ if (sd->f) {
+ fclose(sd->f);
+ sd->f = NULL;
+ }
+
+ vsMotionDetectionCleanup(md);
+}
+
+static int query_formats(AVFilterContext *ctx)
+{
+ // If you add something here also add it in vidstabutils.c
+ static const enum AVPixelFormat pix_fmts[] = {
+ AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
+ AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P,
+ AV_PIX_FMT_YUV440P, AV_PIX_FMT_GRAY8,
+ AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_RGBA,
+ AV_PIX_FMT_NONE
+ };
+
+ ff_set_common_formats(ctx, ff_make_format_list(pix_fmts));
+ return 0;
+}
+
+static int config_input(AVFilterLink *inlink)
+{
+ AVFilterContext *ctx = inlink->dst;
+ StabData *sd = ctx->priv;
+
+ VSMotionDetect* md = &(sd->md);
+ VSFrameInfo fi;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
+
+ vsFrameInfoInit(&fi, inlink->w, inlink->h, av_2_vs_pixel_format(ctx, inlink->format));
+ if (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
+ sd->conf.algo = 1;
+ sd->conf.modName = "vidstabdetect";
+ if (vsMotionDetectInit(md, &sd->conf, &fi) != VS_OK) {
+ av_log(ctx, AV_LOG_ERROR, "initialization of Motion Detection failed, please report a BUG");
+ return AVERROR(EINVAL);
+ }
+
+ vsMotionDetectGetConfig(&sd->conf, md);
+ av_log(ctx, AV_LOG_INFO, "Video stabilization settings (pass 1/2):\n");
+ av_log(ctx, AV_LOG_INFO, " shakiness = %d\n", sd->conf.shakiness);
+ av_log(ctx, AV_LOG_INFO, " accuracy = %d\n", sd->conf.accuracy);
+ av_log(ctx, AV_LOG_INFO, " stepsize = %d\n", sd->conf.stepSize);
+ av_log(ctx, AV_LOG_INFO, " mincontrast = %f\n", sd->conf.contrastThreshold);
+ av_log(ctx, AV_LOG_INFO, " tripod = %d\n", sd->conf.virtualTripod);
+ av_log(ctx, AV_LOG_INFO, " show = %d\n", sd->conf.show);
+ av_log(ctx, AV_LOG_INFO, " result = %s\n", sd->result);
+
+ sd->f = fopen(sd->result, "w");
+ if (sd->f == NULL) {
+ av_log(ctx, AV_LOG_ERROR, "cannot open transform file %s\n", sd->result);
+ return AVERROR(EINVAL);
+ } else {
+ if (vsPrepareFile(md, sd->f) != VS_OK) {
+ av_log(ctx, AV_LOG_ERROR, "cannot write to transform file %s\n", sd->result);
+ return AVERROR(EINVAL);
+ }
+ }
+ return 0;
+}
+
+static int filter_frame(AVFilterLink *inlink, AVFrame *in)
+{
+ AVFilterContext *ctx = inlink->dst;
+ StabData *sd = ctx->priv;
+ VSMotionDetect *md = &(sd->md);
+ LocalMotions localmotions;
+
+ AVFilterLink *outlink = inlink->dst->outputs[0];
+ VSFrame frame;
+ int plane;
+
+ if (sd->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, sd->f, &localmotions) != VS_OK) {
+ av_log(ctx, AV_LOG_ERROR, "cannot write to transform file");
+ return AVERROR(errno);
+ }
+ 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,
+ },
+ { NULL }
+};
+
+static const AVFilterPad avfilter_vf_vidstabdetect_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ },
+ { NULL }
+};
+
+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,
+ .query_formats = query_formats,
+ .inputs = avfilter_vf_vidstabdetect_inputs,
+ .outputs = avfilter_vf_vidstabdetect_outputs,
+ .priv_class = &vidstabdetect_class,
+};
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