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path: root/libavfilter/vf_vidstabdetect.c (plain)
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1/*
2 * Copyright (c) 2013 Georg Martius <georg dot martius at web dot de>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#define DEFAULT_RESULT_NAME "transforms.trf"
22
23#include <vid.stab/libvidstab.h>
24
25#include "libavutil/common.h"
26#include "libavutil/opt.h"
27#include "libavutil/imgutils.h"
28#include "avfilter.h"
29#include "internal.h"
30
31#include "vidstabutils.h"
32
33typedef struct {
34 const AVClass *class;
35
36 VSMotionDetect md;
37 VSMotionDetectConfig conf;
38
39 char *result;
40 FILE *f;
41} StabData;
42
43
44#define OFFSET(x) offsetof(StabData, x)
45#define OFFSETC(x) (offsetof(StabData, conf)+offsetof(VSMotionDetectConfig, x))
46#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
47
48static const AVOption vidstabdetect_options[] = {
49 {"result", "path to the file used to write the transforms", OFFSET(result), AV_OPT_TYPE_STRING, {.str = DEFAULT_RESULT_NAME}, .flags = FLAGS},
50 {"shakiness", "how shaky is the video and how quick is the camera?"
51 " 1: little (fast) 10: very strong/quick (slow)", OFFSETC(shakiness), AV_OPT_TYPE_INT, {.i64 = 5}, 1, 10, FLAGS},
52 {"accuracy", "(>=shakiness) 1: low 15: high (slow)", OFFSETC(accuracy), AV_OPT_TYPE_INT, {.i64 = 15}, 1, 15, FLAGS},
53 {"stepsize", "region around minimum is scanned with 1 pixel resolution", OFFSETC(stepSize), AV_OPT_TYPE_INT, {.i64 = 6}, 1, 32, FLAGS},
54 {"mincontrast", "below this contrast a field is discarded (0-1)", OFFSETC(contrastThreshold), AV_OPT_TYPE_DOUBLE, {.dbl = 0.25}, 0.0, 1.0, FLAGS},
55 {"show", "0: draw nothing; 1,2: show fields and transforms", OFFSETC(show), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 2, FLAGS},
56 {"tripod", "virtual tripod mode (if >0): motion is compared to a reference"
57 " reference frame (frame # is the value)", OFFSETC(virtualTripod), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS},
58 {NULL}
59};
60
61AVFILTER_DEFINE_CLASS(vidstabdetect);
62
63static av_cold int init(AVFilterContext *ctx)
64{
65 StabData *s = ctx->priv;
66 ff_vs_init();
67 s->class = &vidstabdetect_class;
68 av_log(ctx, AV_LOG_VERBOSE, "vidstabdetect filter: init %s\n", LIBVIDSTAB_VERSION);
69 return 0;
70}
71
72static av_cold void uninit(AVFilterContext *ctx)
73{
74 StabData *s = ctx->priv;
75 VSMotionDetect *md = &(s->md);
76
77 if (s->f) {
78 fclose(s->f);
79 s->f = NULL;
80 }
81
82 vsMotionDetectionCleanup(md);
83}
84
85static int query_formats(AVFilterContext *ctx)
86{
87 // If you add something here also add it in vidstabutils.c
88 static const enum AVPixelFormat pix_fmts[] = {
89 AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P,
90 AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUVA420P,
91 AV_PIX_FMT_YUV440P, AV_PIX_FMT_GRAY8,
92 AV_PIX_FMT_RGB24, AV_PIX_FMT_BGR24, AV_PIX_FMT_RGBA,
93 AV_PIX_FMT_NONE
94 };
95
96 AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
97 if (!fmts_list)
98 return AVERROR(ENOMEM);
99 return ff_set_common_formats(ctx, fmts_list);
100}
101
102static int config_input(AVFilterLink *inlink)
103{
104 AVFilterContext *ctx = inlink->dst;
105 StabData *s = ctx->priv;
106
107 VSMotionDetect* md = &(s->md);
108 VSFrameInfo fi;
109 const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format);
110
111 vsFrameInfoInit(&fi, inlink->w, inlink->h,
112 ff_av2vs_pixfmt(ctx, inlink->format));
113 if (fi.bytesPerPixel != av_get_bits_per_pixel(desc)/8) {
114 av_log(ctx, AV_LOG_ERROR, "pixel-format error: wrong bits/per/pixel, please report a BUG");
115 return AVERROR(EINVAL);
116 }
117 if (fi.log2ChromaW != desc->log2_chroma_w) {
118 av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_w, please report a BUG");
119 return AVERROR(EINVAL);
120 }
121
122 if (fi.log2ChromaH != desc->log2_chroma_h) {
123 av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_h, please report a BUG");
124 return AVERROR(EINVAL);
125 }
126
127 // set values that are not initialized by the options
128 s->conf.algo = 1;
129 s->conf.modName = "vidstabdetect";
130 if (vsMotionDetectInit(md, &s->conf, &fi) != VS_OK) {
131 av_log(ctx, AV_LOG_ERROR, "initialization of Motion Detection failed, please report a BUG");
132 return AVERROR(EINVAL);
133 }
134
135 vsMotionDetectGetConfig(&s->conf, md);
136 av_log(ctx, AV_LOG_INFO, "Video stabilization settings (pass 1/2):\n");
137 av_log(ctx, AV_LOG_INFO, " shakiness = %d\n", s->conf.shakiness);
138 av_log(ctx, AV_LOG_INFO, " accuracy = %d\n", s->conf.accuracy);
139 av_log(ctx, AV_LOG_INFO, " stepsize = %d\n", s->conf.stepSize);
140 av_log(ctx, AV_LOG_INFO, " mincontrast = %f\n", s->conf.contrastThreshold);
141 av_log(ctx, AV_LOG_INFO, " tripod = %d\n", s->conf.virtualTripod);
142 av_log(ctx, AV_LOG_INFO, " show = %d\n", s->conf.show);
143 av_log(ctx, AV_LOG_INFO, " result = %s\n", s->result);
144
145 s->f = fopen(s->result, "w");
146 if (s->f == NULL) {
147 av_log(ctx, AV_LOG_ERROR, "cannot open transform file %s\n", s->result);
148 return AVERROR(EINVAL);
149 } else {
150 if (vsPrepareFile(md, s->f) != VS_OK) {
151 av_log(ctx, AV_LOG_ERROR, "cannot write to transform file %s\n", s->result);
152 return AVERROR(EINVAL);
153 }
154 }
155 return 0;
156}
157
158static int filter_frame(AVFilterLink *inlink, AVFrame *in)
159{
160 AVFilterContext *ctx = inlink->dst;
161 StabData *s = ctx->priv;
162 VSMotionDetect *md = &(s->md);
163 LocalMotions localmotions;
164
165 AVFilterLink *outlink = inlink->dst->outputs[0];
166 VSFrame frame;
167 int plane;
168
169 if (s->conf.show > 0 && !av_frame_is_writable(in))
170 av_frame_make_writable(in);
171
172 for (plane = 0; plane < md->fi.planes; plane++) {
173 frame.data[plane] = in->data[plane];
174 frame.linesize[plane] = in->linesize[plane];
175 }
176 if (vsMotionDetection(md, &localmotions, &frame) != VS_OK) {
177 av_log(ctx, AV_LOG_ERROR, "motion detection failed");
178 return AVERROR(AVERROR_EXTERNAL);
179 } else {
180 if (vsWriteToFile(md, s->f, &localmotions) != VS_OK) {
181 int ret = AVERROR(errno);
182 av_log(ctx, AV_LOG_ERROR, "cannot write to transform file");
183 return ret;
184 }
185 vs_vector_del(&localmotions);
186 }
187
188 return ff_filter_frame(outlink, in);
189}
190
191static const AVFilterPad avfilter_vf_vidstabdetect_inputs[] = {
192 {
193 .name = "default",
194 .type = AVMEDIA_TYPE_VIDEO,
195 .filter_frame = filter_frame,
196 .config_props = config_input,
197 },
198 { NULL }
199};
200
201static const AVFilterPad avfilter_vf_vidstabdetect_outputs[] = {
202 {
203 .name = "default",
204 .type = AVMEDIA_TYPE_VIDEO,
205 },
206 { NULL }
207};
208
209AVFilter ff_vf_vidstabdetect = {
210 .name = "vidstabdetect",
211 .description = NULL_IF_CONFIG_SMALL("Extract relative transformations, "
212 "pass 1 of 2 for stabilization "
213 "(see vidstabtransform for pass 2)."),
214 .priv_size = sizeof(StabData),
215 .init = init,
216 .uninit = uninit,
217 .query_formats = query_formats,
218 .inputs = avfilter_vf_vidstabdetect_inputs,
219 .outputs = avfilter_vf_vidstabdetect_outputs,
220 .priv_class = &vidstabdetect_class,
221};
222
generated by cgit at 2024-05-17 20:29:01 (GMT)