FFmpeg
vf_vidstabdetect.c
Go to the documentation of this file.
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 
33 typedef struct StabData {
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 
48 static 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 
61 AVFILTER_DEFINE_CLASS(vidstabdetect);
62 
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 
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 
86 {
87  AVFilterContext *ctx = inlink->dst;
88  StabData *s = ctx->priv;
89 
90  VSMotionDetect* md = &(s->md);
91  VSFrameInfo fi;
93  int is_planar = desc->flags & AV_PIX_FMT_FLAG_PLANAR;
94 
95  vsFrameInfoInit(&fi, inlink->w, inlink->h,
96  ff_av2vs_pixfmt(ctx, inlink->format));
97  if (!is_planar && fi.bytesPerPixel != av_get_bits_per_pixel(desc)/8) {
98  av_log(ctx, AV_LOG_ERROR, "pixel-format error: wrong bits/per/pixel, please report a BUG");
99  return AVERROR(EINVAL);
100  }
101  if (fi.log2ChromaW != desc->log2_chroma_w) {
102  av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_w, please report a BUG");
103  return AVERROR(EINVAL);
104  }
105 
106  if (fi.log2ChromaH != desc->log2_chroma_h) {
107  av_log(ctx, AV_LOG_ERROR, "pixel-format error: log2_chroma_h, please report a BUG");
108  return AVERROR(EINVAL);
109  }
110 
111  // set values that are not initialized by the options
112  s->conf.algo = 1;
113  s->conf.modName = "vidstabdetect";
114  if (vsMotionDetectInit(md, &s->conf, &fi) != VS_OK) {
115  av_log(ctx, AV_LOG_ERROR, "initialization of Motion Detection failed, please report a BUG");
116  return AVERROR(EINVAL);
117  }
118 
119  vsMotionDetectGetConfig(&s->conf, md);
120  av_log(ctx, AV_LOG_INFO, "Video stabilization settings (pass 1/2):\n");
121  av_log(ctx, AV_LOG_INFO, " shakiness = %d\n", s->conf.shakiness);
122  av_log(ctx, AV_LOG_INFO, " accuracy = %d\n", s->conf.accuracy);
123  av_log(ctx, AV_LOG_INFO, " stepsize = %d\n", s->conf.stepSize);
124  av_log(ctx, AV_LOG_INFO, " mincontrast = %f\n", s->conf.contrastThreshold);
125  av_log(ctx, AV_LOG_INFO, " tripod = %d\n", s->conf.virtualTripod);
126  av_log(ctx, AV_LOG_INFO, " show = %d\n", s->conf.show);
127  av_log(ctx, AV_LOG_INFO, " result = %s\n", s->result);
128 
129  s->f = fopen(s->result, "w");
130  if (s->f == NULL) {
131  av_log(ctx, AV_LOG_ERROR, "cannot open transform file %s\n", s->result);
132  return AVERROR(EINVAL);
133  } else {
134  if (vsPrepareFile(md, s->f) != VS_OK) {
135  av_log(ctx, AV_LOG_ERROR, "cannot write to transform file %s\n", s->result);
136  return AVERROR(EINVAL);
137  }
138  }
139  return 0;
140 }
141 
143 {
144  AVFilterContext *ctx = inlink->dst;
145  StabData *s = ctx->priv;
146  VSMotionDetect *md = &(s->md);
147  LocalMotions localmotions;
148 
149  AVFilterLink *outlink = inlink->dst->outputs[0];
150  VSFrame frame;
151  int plane;
152 
153  if (s->conf.show > 0 && !av_frame_is_writable(in))
155 
156  for (plane = 0; plane < md->fi.planes; plane++) {
157  frame.data[plane] = in->data[plane];
158  frame.linesize[plane] = in->linesize[plane];
159  }
160  if (vsMotionDetection(md, &localmotions, &frame) != VS_OK) {
161  av_log(ctx, AV_LOG_ERROR, "motion detection failed");
162  return AVERROR(AVERROR_EXTERNAL);
163  } else {
164  if (vsWriteToFile(md, s->f, &localmotions) != VS_OK) {
165  int ret = AVERROR(errno);
166  av_log(ctx, AV_LOG_ERROR, "cannot write to transform file");
167  return ret;
168  }
169  vs_vector_del(&localmotions);
170  }
171 
172  return ff_filter_frame(outlink, in);
173 }
174 
176  {
177  .name = "default",
178  .type = AVMEDIA_TYPE_VIDEO,
179  .filter_frame = filter_frame,
180  .config_props = config_input,
181  },
182 };
183 
185  {
186  .name = "default",
187  .type = AVMEDIA_TYPE_VIDEO,
188  },
189 };
190 
192  .name = "vidstabdetect",
193  .description = NULL_IF_CONFIG_SMALL("Extract relative transformations, "
194  "pass 1 of 2 for stabilization "
195  "(see vidstabtransform for pass 2)."),
196  .priv_size = sizeof(StabData),
197  .init = init,
198  .uninit = uninit,
202  .priv_class = &vidstabdetect_class,
203 };
ff_vf_vidstabdetect
const AVFilter ff_vf_vidstabdetect
Definition: vf_vidstabdetect.c:191
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
opt.h
vidstabutils.h
ff_filter_frame
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1018
av_pix_fmt_desc_get
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2564
FILTER_PIXFMTS_ARRAY
#define FILTER_PIXFMTS_ARRAY(array)
Definition: internal.h:171
FLAGS
#define FLAGS
Definition: vf_vidstabdetect.c:46
DEFAULT_RESULT_NAME
#define DEFAULT_RESULT_NAME
Definition: vf_vidstabdetect.c:21
StabData::md
VSMotionDetect md
Definition: vf_vidstabdetect.c:36
inlink
The exact code depends on how similar the blocks are and how related they are to the and needs to apply these operations to the correct inlink or outlink if there are several Macros are available to factor that when no extra processing is inlink
Definition: filter_design.txt:212
md
#define md
Definition: vf_colormatrix.c:103
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
av_frame_make_writable
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
Definition: frame.c:490
AVOption
AVOption.
Definition: opt.h:247
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
av_get_bits_per_pixel
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
Definition: pixdesc.c:2516
filter_frame
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
Definition: vf_vidstabdetect.c:142
AVFilter::name
const char * name
Filter name.
Definition: avfilter.h:153
avfilter_vf_vidstabdetect_outputs
static const AVFilterPad avfilter_vf_vidstabdetect_outputs[]
Definition: vf_vidstabdetect.c:184
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AVFilterPad
A filter pad used for either input or output.
Definition: internal.h:50
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
StabData::f
FILE * f
Definition: vf_vidstabdetect.c:40
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_av2vs_pixfmt
VSPixelFormat ff_av2vs_pixfmt(AVFilterContext *ctx, enum AVPixelFormat pf)
convert AV's pixelformat to vid.stab pixelformat
Definition: vidstabutils.c:32
AV_OPT_TYPE_DOUBLE
@ AV_OPT_TYPE_DOUBLE
Definition: opt.h:226
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ff_vidstab_pix_fmts
enum AVPixelFormat ff_vidstab_pix_fmts[]
Definition: vidstabutils.c:23
OFFSETC
#define OFFSETC(x)
Definition: vf_vidstabdetect.c:45
init
static av_cold int init(AVFilterContext *ctx)
Definition: vf_vidstabdetect.c:63
FILTER_INPUTS
#define FILTER_INPUTS(array)
Definition: internal.h:191
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
result
and forward the result(frame or status change) to the corresponding input. If nothing is possible
NULL
#define NULL
Definition: coverity.c:32
avfilter_vf_vidstabdetect_inputs
static const AVFilterPad avfilter_vf_vidstabdetect_inputs[]
Definition: vf_vidstabdetect.c:175
StabData::conf
VSMotionDetectConfig conf
Definition: vf_vidstabdetect.c:37
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
av_frame_is_writable
int av_frame_is_writable(AVFrame *frame)
Check if the frame data is writable.
Definition: frame.c:473
AVERROR_EXTERNAL
#define AVERROR_EXTERNAL
Generic error in an external library.
Definition: error.h:59
config_input
static int config_input(AVFilterLink *inlink)
Definition: vf_vidstabdetect.c:85
vidstabdetect_options
static const AVOption vidstabdetect_options[]
Definition: vf_vidstabdetect.c:48
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:191
internal.h
uninit
static av_cold void uninit(AVFilterContext *ctx)
Definition: vf_vidstabdetect.c:72
common.h
AVFilterPad::name
const char * name
Pad name.
Definition: internal.h:56
AVFilter
Filter definition.
Definition: avfilter.h:149
AVFILTER_DEFINE_CLASS
AVFILTER_DEFINE_CLASS(vidstabdetect)
ret
ret
Definition: filter_design.txt:187
ff_vs_init
void ff_vs_init(void)
sets the memory allocation function and logging constants to av versions
Definition: vidstabutils.c:77
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
OFFSET
#define OFFSET(x)
Definition: vf_vidstabdetect.c:44
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avfilter.h
AV_PIX_FMT_FLAG_PLANAR
#define AV_PIX_FMT_FLAG_PLANAR
At least one pixel component is not in the first data plane.
Definition: pixdesc.h:132
AVFilterContext
An instance of a filter.
Definition: avfilter.h:386
desc
const char * desc
Definition: libsvtav1.c:79
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVPixFmtDescriptor
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:69
FILTER_OUTPUTS
#define FILTER_OUTPUTS(array)
Definition: internal.h:192
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
StabData
Definition: vf_vidstabdetect.c:33
StabData::result
char * result
Definition: vf_vidstabdetect.c:39