32 #define MAX_FRAMES 240
34 #define NUM_CHANNELS 3
58 #define OFFSET(x) offsetof(PhotosensitivityContext, x)
59 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
64 {
"threshold",
"set detection threshold factor (lower is stricter)",
OFFSET(threshold_multiplier),
AV_OPT_TYPE_FLOAT, {.dbl=1}, 0.1, FLT_MAX,
FLAGS },
65 {
"t",
"set detection threshold factor (lower is stricter)",
OFFSET(threshold_multiplier),
AV_OPT_TYPE_FLOAT, {.dbl=1}, 0.1, FLT_MAX,
FLAGS },
93 #define NUM_CELLS (GRID_SIZE * GRID_SIZE)
97 int cell, gx, gy, x0, x1, y0, y1, x, y,
c, area;
103 const int slice_start = (
NUM_CELLS * jobnr) / nb_jobs;
106 int width =
td->in->width,
height =
td->in->height, linesize =
td->in->linesize[0], skip =
td->skip;
121 for (y = y0; y < y1; y += skip) {
123 for (x = x0; x < x1; x += skip) {
133 area = ((x1 - x0 + skip - 1) / skip) * ((y1 - y0 + skip - 1) / skip);
137 td->out->grid[gy][gx][
c] = sum[
c];
165 const uint16_t s_mul =
td->s_mul;
166 const uint16_t t_mul = 0x100 - s_mul;
167 const int slice_start = (
td->target->height * jobnr) / nb_jobs;
168 const int slice_end = (
td->target->height * (jobnr+1)) / nb_jobs;
169 const int linesize =
td->target->linesize[0];
171 for (y = slice_start; y <
slice_end; y++) {
172 t =
td->target->data[0] + y *
td->target->linesize[0];
173 s =
td->source->data[0] + y *
td->source->linesize[0];
174 for (x = 0; x < linesize; x++) {
175 *t = (*t * t_mul + *
s * s_mul) >> 8;
187 td.s_mul = (uint16_t)(
factor * 0x100);
193 int badness, x, y,
c;
198 badness +=
abs((
int)
a->grid[y][x][
c] - (
int)
b->grid[y][x][
c]);
220 int this_badness, current_badness, fixed_badness, new_badness,
i, res;
233 for (
i = 1;
i <
s->nb_frames;
i++)
234 current_badness +=
i *
s->history[(
s->history_pos +
i) %
s->nb_frames];
235 current_badness /=
s->nb_frames;
239 new_badness = current_badness + this_badness;
241 current_badness, new_badness,
s->badness_threshold,
242 100 * new_badness /
s->badness_threshold, new_badness < s->badness_threshold ?
"OK" :
"EXCEEDED");
244 fixed_badness = new_badness;
245 if (new_badness < s->badness_threshold || !
s->last_frame_av ||
s->bypass) {
248 s->last_frame_av =
src =
in;
249 s->last_frame_e = ef;
250 s->history[
s->history_pos] = this_badness;
252 factor = (float)(
s->badness_threshold - current_badness) / (new_badness - current_badness);
255 s->history[
s->history_pos] = 0;
266 fixed_badness = current_badness + this_badness;
268 current_badness, fixed_badness,
s->badness_threshold,
269 100 * new_badness /
s->badness_threshold,
factor);
270 s->last_frame_e = ef;
271 s->history[
s->history_pos] = this_badness;
273 src =
s->last_frame_av;
276 s->history_pos = (
s->history_pos + 1) %
s->nb_frames;
285 metadata = &
out->metadata;
333 .
name =
"photosensitivity",
334 .description =
NULL_IF_CONFIG_SMALL(
"Filter out photosensitive epilepsy seizure-inducing flashes."),
336 .priv_class = &photosensitivity_class,
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(const uint8_t *) pi - 0x80) *(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(const int16_t *) pi >> 8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t, *(const int16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(const int32_t *) pi >> 24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t, *(const int32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(const float *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(const float *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(const float *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(const double *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(const double *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(const double *) pi *(1U<< 31)))) #define SET_CONV_FUNC_GROUP(ofmt, ifmt) static void set_generic_function(AudioConvert *ac) { } void ff_audio_convert_free(AudioConvert **ac) { if(! *ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);} AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enum AVSampleFormat out_fmt, enum AVSampleFormat in_fmt, int channels, int sample_rate, int apply_map) { AudioConvert *ac;int in_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) return NULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method !=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt) > 2) { ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc) { av_free(ac);return NULL;} return ac;} in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar) { ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar ? ac->channels :1;} else if(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;else ac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);return ac;} int ff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in) { int use_generic=1;int len=in->nb_samples;int p;if(ac->dc) { av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));return ff_convert_dither(ac-> in
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Main libavfilter public API header.
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
Copy only "metadata" fields from src to dst.
int av_frame_make_writable(AVFrame *frame)
Ensure that the frame data is writable, avoiding data copy if possible.
int av_frame_copy(AVFrame *dst, const AVFrame *src)
Copy the frame data from src to dst.
#define AV_LOG_VERBOSE
Detailed information.
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
AVPixelFormat
Pixel format.
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Describe the class of an AVClass context structure.
A link between two filters.
AVFilterContext * dst
dest filter
A filter pad used for either input or output.
const char * name
Pad name.
const char * name
Filter name.
AVFormatInternal * internal
An opaque field for libavformat internal usage.
This structure describes decoded (raw) audio or video data.
float threshold_multiplier
PhotosensitivityFrame last_frame_e
uint8_t grid[GRID_SIZE][GRID_SIZE][4]
PhotosensitivityFrame * out
In the ELBG jargon, a cell is the set of points that are closest to a codebook entry.
static const AVOption photosensitivity_options[]
static int convert_frame_partial(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static void blend_frame(AVFilterContext *ctx, AVFrame *target, AVFrame *source, float factor)
static int query_formats(AVFilterContext *ctx)
static int config_input(AVFilterLink *inlink)
static int blend_frame_partial(AVFilterContext *ctx, void *arg, int jobnr, int nb_jobs)
static const AVFilterPad inputs[]
static int get_badness(PhotosensitivityFrame *a, PhotosensitivityFrame *b)
static const AVFilterPad outputs[]
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
AVFILTER_DEFINE_CLASS(photosensitivity)
static void convert_frame(AVFilterContext *ctx, AVFrame *in, PhotosensitivityFrame *out, int skip)
static av_cold void uninit(AVFilterContext *ctx)
AVFilter ff_vf_photosensitivity
static const int factor[16]
AVFrame * ff_get_video_buffer(AVFilterLink *link, int w, int h)
Request a picture buffer with a specific set of permissions.