Go to the documentation of this file.
1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
19 /**
20  * @file
21  * video freeze detection filter
22  */
24 #include "libavutil/avassert.h"
25 #include "libavutil/imgutils.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/pixdesc.h"
28 #include "libavutil/timestamp.h"
30 #include "avfilter.h"
31 #include "filters.h"
32 #include "scene_sad.h"
34 typedef struct FreezeDetectContext {
35  const AVClass *class;
37  ptrdiff_t width[4];
38  ptrdiff_t height[4];
40  int bitdepth;
42  int64_t n;
43  int64_t reference_n;
44  int frozen;
46  double noise;
47  int64_t duration; ///< minimum duration of frozen frame until notification
50 #define OFFSET(x) offsetof(FreezeDetectContext, x)
54 static const AVOption freezedetect_options[] = {
55  { "n", "set noise tolerance", OFFSET(noise), AV_OPT_TYPE_DOUBLE, {.dbl=0.001}, 0, 1.0, V|F },
56  { "noise", "set noise tolerance", OFFSET(noise), AV_OPT_TYPE_DOUBLE, {.dbl=0.001}, 0, 1.0, V|F },
57  { "d", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, INT64_MAX, V|F },
58  { "duration", "set minimum duration in seconds", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64=2000000}, 0, INT64_MAX, V|F },
60  {NULL}
61 };
63 AVFILTER_DEFINE_CLASS(freezedetect);
66 {
67  static const enum AVPixelFormat pix_fmts[] = {
92  };
94  AVFilterFormats *fmts_list = ff_make_format_list(pix_fmts);
95  if (!fmts_list)
96  return AVERROR(ENOMEM);
97  return ff_set_common_formats(ctx, fmts_list);
98 }
101 {
102  AVFilterContext *ctx = inlink->dst;
103  FreezeDetectContext *s = ctx->priv;
104  const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(inlink->format);
106  s->bitdepth = pix_desc->comp[0].depth;
108  for (int plane = 0; plane < 4; plane++) {
109  ptrdiff_t line_size = av_image_get_linesize(inlink->format, inlink->w, plane);
110  s->width[plane] = line_size >> (s->bitdepth > 8);
111  s->height[plane] = inlink->h >> ((plane == 1 || plane == 2) ? pix_desc->log2_chroma_h : 0);
112  }
114  s->sad = ff_scene_sad_get_fn(s->bitdepth == 8 ? 8 : 16);
115  if (!s->sad)
116  return AVERROR(EINVAL);
118  return 0;
119 }
122 {
123  FreezeDetectContext *s = ctx->priv;
125 }
128 {
129  uint64_t sad = 0;
130  uint64_t count = 0;
131  double mafd;
132  for (int plane = 0; plane < 4; plane++) {
133  if (s->width[plane]) {
134  uint64_t plane_sad;
135  s->sad(frame->data[plane], frame->linesize[plane],
136  reference->data[plane], reference->linesize[plane],
137  s->width[plane], s->height[plane], &plane_sad);
138  sad += plane_sad;
139  count += s->width[plane] * s->height[plane];
140  }
141  }
142  emms_c();
143  mafd = (double)sad / count / (1ULL << s->bitdepth);
144  return (mafd <= s->noise);
145 }
147 static int set_meta(FreezeDetectContext *s, AVFrame *frame, const char *key, const char *value)
148 {
149  av_log(s, AV_LOG_INFO, "%s: %s\n", key, value);
150  return av_dict_set(&frame->metadata, key, value, 0);
151 }
154 {
155  int ret;
156  AVFilterLink *inlink = ctx->inputs[0];
157  AVFilterLink *outlink = ctx->outputs[0];
158  FreezeDetectContext *s = ctx->priv;
159  AVFrame *frame;
161  FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
163  ret = ff_inlink_consume_frame(inlink, &frame);
164  if (ret < 0)
165  return ret;
167  if (frame) {
168  int frozen = 0;
169  s->n++;
171  if (s->reference_frame) {
172  int64_t duration;
173  if (s->reference_frame->pts == AV_NOPTS_VALUE || frame->pts == AV_NOPTS_VALUE || frame->pts < s->reference_frame->pts) // Discontinuity?
174  duration = inlink->frame_rate.num > 0 ? av_rescale_q(s->n - s->reference_n, av_inv_q(inlink->frame_rate), AV_TIME_BASE_Q) : 0;
175  else
176  duration = av_rescale_q(frame->pts - s->reference_frame->pts, inlink->time_base, AV_TIME_BASE_Q);
178  frozen = is_frozen(s, s->reference_frame, frame);
179  if (duration >= s->duration) {
180  if (!s->frozen)
181  set_meta(s, frame, "lavfi.freezedetect.freeze_start", av_ts2timestr(s->reference_frame->pts, &inlink->time_base));
182  if (!frozen) {
183  set_meta(s, frame, "lavfi.freezedetect.freeze_duration", av_ts2timestr(duration, &AV_TIME_BASE_Q));
184  set_meta(s, frame, "lavfi.freezedetect.freeze_end", av_ts2timestr(frame->pts, &inlink->time_base));
185  }
186  s->frozen = frozen;
187  }
188  }
190  if (!frozen) {
192  s->reference_frame = av_frame_clone(frame);
193  s->reference_n = s->n;
194  if (!s->reference_frame) {
195  av_frame_free(&frame);
196  return AVERROR(ENOMEM);
197  }
198  }
199  return ff_filter_frame(outlink, frame);
200  }
202  FF_FILTER_FORWARD_STATUS(inlink, outlink);
203  FF_FILTER_FORWARD_WANTED(outlink, inlink);
205  return FFERROR_NOT_READY;
206 }
209  {
210  .name = "default",
211  .type = AVMEDIA_TYPE_VIDEO,
212  .config_props = config_input,
213  },
214  { NULL }
215 };
218  {
219  .name = "default",
220  .type = AVMEDIA_TYPE_VIDEO,
221  },
222  { NULL }
223 };
226  .name = "freezedetect",
227  .description = NULL_IF_CONFIG_SMALL("Detects frozen video input."),
228  .priv_size = sizeof(FreezeDetectContext),
229  .priv_class = &freezedetect_class,
230  .uninit = uninit,
232  .inputs = freezedetect_inputs,
233  .outputs = freezedetect_outputs,
234  .activate = activate,
235 };
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
Definition: pixfmt.h:81
int ff_inlink_consume_frame(AVFilterLink *link, AVFrame **rframe)
Take a frame from the link&#39;s FIFO and update the link&#39;s stats.
Definition: avfilter.c:1491
#define NULL
Definition: coverity.c:32
void(* ff_scene_sad_fn)(SCENE_SAD_PARAMS)
Definition: scene_sad.h:34
int av_image_get_linesize(enum AVPixelFormat pix_fmt, int width, int plane)
Compute the size of an image line with format pix_fmt and width width for the plane plane...
Definition: imgutils.c:76
#define AV_PIX_FMT_YUVA422P16
Definition: pixfmt.h:442
#define AV_PIX_FMT_YUV440P10
Definition: pixfmt.h:401
#define AV_PIX_FMT_YUVA422P9
Definition: pixfmt.h:434
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
Definition: pixdesc.c:2573
This structure describes decoded (raw) audio or video data.
Definition: frame.h:314
Definition: opt.h:248
#define AV_PIX_FMT_YUVA420P10
Definition: pixfmt.h:436
#define AV_PIX_FMT_YUV444P14
Definition: pixfmt.h:409
8 bits gray, 8 bits alpha
Definition: pixfmt.h:143
#define AV_PIX_FMT_GBRAP10
Definition: pixfmt.h:419
#define AV_PIX_FMT_YUVA422P10
Definition: pixfmt.h:437
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
Definition: pixfmt.h:71
misc image utilities
Main libavfilter public API header.
packed RGB 8:8:8, 24bpp, RGBRGB...
Definition: pixfmt.h:68
ff_scene_sad_fn ff_scene_sad_get_fn(int depth)
Definition: scene_sad.c:59
#define OFFSET(x)
planar GBR 4:4:4 24bpp
Definition: pixfmt.h:168
int num
Definition: rational.h:59
#define AV_PIX_FMT_GBRP10
Definition: pixfmt.h:415
#define AV_PIX_FMT_GRAY9
Definition: pixfmt.h:379
#define AV_PIX_FMT_YUV420P12
Definition: pixfmt.h:403
const char * key
static const AVFilterPad freezedetect_outputs[]
#define F
AVFilterFormats * ff_make_format_list(const int *fmts)
Create a list of supported formats.
Definition: formats.c:287
#define AV_PIX_FMT_GRAY10
Definition: pixfmt.h:380
static int set_meta(FreezeDetectContext *s, AVFrame *frame, const char *key, const char *value)
const char * name
Pad name.
Definition: internal.h:60
#define AV_PIX_FMT_GRAY12
Definition: pixfmt.h:381
AVFilterLink ** inputs
array of pointers to input links
Definition: avfilter.h:349
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
Definition: avfilter.c:1093
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
Definition: pixfmt.h:101
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
Definition: pixdesc.h:117
#define av_cold
Definition: attributes.h:88
timestamp utils, mostly useful for debugging/logging purposes
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:108
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
Definition: frame.h:407
#define AV_PIX_FMT_YUVA420P9
Definition: pixfmt.h:433
#define AV_PIX_FMT_GBRP9
Definition: pixfmt.h:414
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
Definition: pixfmt.h:94
static const AVOption freezedetect_options[]
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
Definition: pixfmt.h:100
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
Definition: pixfmt.h:79
AVDictionary * metadata
Definition: frame.h:600
#define AV_PIX_FMT_YUV444P16
Definition: pixfmt.h:412
#define AV_PIX_FMT_YUV422P12
Definition: pixfmt.h:404
#define AV_PIX_FMT_YUVA420P16
Definition: pixfmt.h:441
#define av_log(a,...)
#define FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink)
Forward the status on an output link to an input link.
Definition: filters.h:199
A filter pad used for either input or output.
Definition: internal.h:54
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
Scene SAD functions.
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
Definition: pixfmt.h:176
static int query_formats(AVFilterContext *ctx)
int ff_set_common_formats(AVFilterContext *ctx, AVFilterFormats *formats)
A helper for query_formats() which sets all links to the same list of formats.
Definition: formats.c:588
uint8_t log2_chroma_h
Amount to shift the luma height right to find the chroma height.
Definition: pixdesc.h:101
static int activate(AVFilterContext *ctx)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:203
#define av_ts2timestr(ts, tb)
Convenience macro, the return value should be used only directly in function arguments but never stan...
Definition: timestamp.h:76
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:115
static int config_input(AVFilterLink *inlink)
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
Definition: pixfmt.h:95
void * priv
private data for use by the filter
Definition: avfilter.h:356
#define AV_PIX_FMT_YUVA444P16
Definition: pixfmt.h:443
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
Definition: pixfmt.h:89
#define AV_PIX_FMT_GBRAP12
Definition: pixfmt.h:420
simple assert() macros that are a bit more flexible than ISO C assert().
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:402
int64_t duration
minimum duration of frozen frame until notification
GLsizei count
Definition: opengl_enc.c:108
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
#define AV_PIX_FMT_GBRAP16
Definition: pixfmt.h:421
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
Definition: pixfmt.h:93
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:70
#define AV_PIX_FMT_YUV422P9
Definition: pixfmt.h:397
as above, but U and V bytes are swapped
Definition: pixfmt.h:90
#define AV_PIX_FMT_GBRP16
Definition: pixfmt.h:418
#define AV_PIX_FMT_GRAY16
Definition: pixfmt.h:383
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
Definition: pixfmt.h:78
AVFormatContext * ctx
Definition: movenc.c:48
packed YUV 4:2:2, 16bpp, Y0 Cr Y1 Cb
Definition: pixfmt.h:210
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
#define s(width, name)
Definition: cbs_vp9.c:257
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:69
#define AV_PIX_FMT_YUVA444P10
Definition: pixfmt.h:438
#define AV_PIX_FMT_YUV444P9
Definition: pixfmt.h:398
#define AV_PIX_FMT_GBRP14
Definition: pixfmt.h:417
AVFrame * av_frame_clone(const AVFrame *src)
Create a new frame that references the same data as src.
Definition: frame.c:540
static const AVFilterPad outputs[]
Definition: af_acontrast.c:203
#define AV_PIX_FMT_YUV420P16
Definition: pixfmt.h:410
static av_cold void uninit(AVFilterContext *ctx)
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_PIX_FMT_YUV420P14
Definition: pixfmt.h:407
#define AV_TIME_BASE_Q
Internal time base represented as fractional value.
Definition: avutil.h:260
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:345
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Definition: pixfmt.h:177
static const AVFilterPad freezedetect_inputs[]
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
Definition: pixdesc.h:81
#define AV_PIX_FMT_GRAY14
Definition: pixfmt.h:382
ff_scene_sad_fn sad
#define V
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:67
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 inputs
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
#define AV_PIX_FMT_YUV420P10
Definition: pixfmt.h:399
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
Describe the class of an AVClass context structure.
Definition: log.h:67
Filter definition.
Definition: avfilter.h:145
const char * name
Filter name.
Definition: avfilter.h:149
#define AV_PIX_FMT_YUV440P12
Definition: pixfmt.h:405
#define AV_PIX_FMT_YUV420P9
Definition: pixfmt.h:396
AVFilterLink ** outputs
array of pointers to output links
Definition: avfilter.h:353
static enum AVPixelFormat pix_fmts[]
Definition: libkvazaar.c:303
#define AV_PIX_FMT_YUV422P14
Definition: pixfmt.h:408
#define AV_PIX_FMT_GBRP12
Definition: pixfmt.h:416
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:400
#define AV_PIX_FMT_YUV444P12
Definition: pixfmt.h:406
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:328
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
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
static int is_frozen(FreezeDetectContext *s, AVFrame *reference, AVFrame *frame)
Y , 8bpp.
Definition: pixfmt.h:74
planar GBRA 4:4:4:4 32bpp
Definition: pixfmt.h:215
#define AV_PIX_FMT_YUVA444P9
Definition: pixfmt.h:435
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
Definition: pixfmt.h:80
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
Definition: pixfmt.h:73
interleaved chroma YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:201
A list of supported formats for one end of a filter link.
Definition: formats.h:65
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
Definition: pixfmt.h:258
An instance of a filter.
Definition: avfilter.h:341
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
Definition: pixfmt.h:99
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
int depth
Number of bits in the component.
Definition: pixdesc.h:58
Pixel format.
Definition: pixfmt.h:64
#define AV_PIX_FMT_YUV422P16
Definition: pixfmt.h:411
AVFilter ff_vf_freezedetect
Undefined timestamp value.
Definition: avutil.h:248