40 #define CLOCK_BITSIZE_MIN 0.2f
41 #define CLOCK_BITSIZE_MAX 1.5f
42 #define SYNC_BITSIZE_MIN 12.f
43 #define SYNC_BITSIZE_MAX 15.f
89 #define OFFSET(x) offsetof(ReadEIA608Context, x)
90 #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_RUNTIME_PARAM
140 if (end >= inlink->
h) {
150 if (
s->nb_allocated < end - start + 1) {
151 const int diff = end - start + 1 -
s->nb_allocated;
156 memset(&
s->scan[
s->nb_allocated], 0,
diff *
sizeof(*
s->scan));
157 s->nb_allocated = end - start + 1;
160 for (
int i = 0;
i <
s->nb_allocated;
i++) {
189 const int max =
s->max;
190 int start = 0, end = 0, middle;
191 int black = 0, white = 0;
194 for (
int i = 0;
i <=
max;
i++) {
201 for (
int i =
max;
i >= 0;
i--) {
208 middle = start + (end - start) / 2;
211 for (
int i = start;
i <= middle;
i++) {
219 for (
int i = end;
i >= middle;
i--) {
232 float sum = 0.0,
mean = 0.0;
234 for (
int i = 0;
i <
len;
i++)
235 sum +=
line[
i].filtered;
245 float standard_deviation = 0.f;
247 for (
int i = 0;
i <
len;
i++)
248 standard_deviation += (
line[
i].filtered - m) * (
line[
i].filtered - m);
250 return sqrtf(standard_deviation / (
len - 1));
254 int lag,
float threshold,
float influence,
int len)
256 for (
int i = lag;
i <
len + lag;
i++) {
261 for (
int i = 0;
i < lag;
i++) {
269 for (
int i = lag;
i <
len + lag;
i++) {
272 line[
i].output = 255;
277 line[
i].filtered = influence *
line[
i].unfiltered + (1.f - influence) *
line[
i-1].filtered;
279 int distance_from_black, distance_from_white;
284 line[
i].output = distance_from_black <= distance_from_white ? 0 : 255;
294 int hold =
line[
LAG].output, cnt = 0;
300 if (
line[
i].output != hold) {
301 code[cnt].size =
i - last;
302 code[cnt].bit = hold;
303 hold =
line[
i].output;
310 code[cnt].bit = hold;
318 for (
int i = 0;
i <
len;
i++) {
324 #define READ_LINE(type, name) \
325 static void read_##name(AVFrame *in, int nb_line, LineItem *line, int lp, int w) \
327 const type *src = (const type *)(&in->data[0][nb_line * in->linesize[0]]);\
330 for (int i = 0; i < w; i++) { \
331 int a = FFMAX(i - 3, 0); \
332 int b = FFMAX(i - 2, 0); \
333 int c = FFMAX(i - 1, 0); \
334 int d = FFMIN(i + 3, w-1); \
335 int e = FFMIN(i + 2, w-1); \
336 int f = FFMIN(i + 1, w-1); \
338 line[LAG + i].input = (src[a] + src[b] + src[c] + src[i] + \
339 src[d] + src[e] + src[f] + 6) / 7; \
342 for (int i = 0; i < w; i++) { \
343 line[LAG + i].input = src[i]; \
359 s->depth =
desc->comp[0].depth;
360 s->max = (1 <<
desc->comp[0].depth) - 1;
361 s->read_line[0] = read_byte;
362 s->read_line[1] = read_word;
373 float bit_size = 0.f;
380 s->read_line[
s->depth > 8](
in, nb_line,
line,
s->lp,
w);
397 for (
i = 14;
i <
len;
i++) {
402 for (
i = 1;
i < 14;
i++) {
409 if (scan->
code[15].
size / bit_size < 0.45f) {
413 for (j = 0,
i = 14;
i <
len;
i++) {
419 for (
int k = 0; j < 19 && k <
run; k++) {
427 for (ch = 0; ch < 2; ch++) {
429 int b = codes[3 + ch * 8 +
i];
442 scan->
byte[ch] = 0x7F;
452 int job,
int nb_jobs)
456 const int h =
s->end -
s->start + 1;
457 const int start = (
h * job) / nb_jobs;
458 const int end = (
h * (job+1)) / nb_jobs;
461 for (
int i = start;
i < end;
i++) {
481 for (
int i = 0;
i <
s->end -
s->start + 1;
i++) {
510 for (
int i = 0;
i <
s->nb_allocated;
i++) {
523 char *res,
int res_len,
int flags)
526 int ret, start =
s->start, end =
s->end;
560 .
name =
"readeia608",
561 .description =
NULL_IF_CONFIG_SMALL(
"Read EIA-608 Closed Caption codes from input video and write them to frame metadata."),
563 .priv_class = &readeia608_class,
static const AVFilterPad inputs[]
static const AVFilterPad outputs[]
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_process_command(AVFilterContext *ctx, const char *cmd, const char *arg, char *res, int res_len, int flags)
Generic processing of user supplied commands that are set in the same way as the filter options.
int ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
Main libavfilter public API header.
#define flags(name, subs,...)
#define bit(string, value)
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
static __device__ float fabsf(float a)
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
#define AV_PIX_FMT_YUV420P16
#define AV_PIX_FMT_YUV444P12
#define AV_PIX_FMT_YUV444P9
#define AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV440P12
#define AV_PIX_FMT_YUV422P9
#define AV_PIX_FMT_YUVA444P10
#define AV_PIX_FMT_YUVA420P16
#define AV_PIX_FMT_YUV420P12
#define AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUVA422P9
#define AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_GRAY12
#define AV_PIX_FMT_YUV420P9
#define AV_PIX_FMT_YUVA420P9
#define AV_PIX_FMT_YUVA422P10
#define AV_PIX_FMT_YUV420P14
AVPixelFormat
Pixel format.
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
@ AV_PIX_FMT_YUV440P
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
@ AV_PIX_FMT_YUVA420P
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
@ AV_PIX_FMT_YUVJ440P
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
@ AV_PIX_FMT_YUV411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
@ AV_PIX_FMT_YUV444P
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
@ AV_PIX_FMT_YUVA444P
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
@ AV_PIX_FMT_YUVJ411P
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
@ AV_PIX_FMT_YUVJ422P
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
@ AV_PIX_FMT_YUVA422P
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
@ AV_PIX_FMT_YUVJ444P
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
@ AV_PIX_FMT_YUVJ420P
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
#define AV_PIX_FMT_YUVA422P12
#define AV_PIX_FMT_YUV422P14
#define AV_PIX_FMT_GRAY10
#define AV_PIX_FMT_GRAY14
#define AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_GRAY16
#define AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUVA422P16
#define AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUVA444P9
#define AV_PIX_FMT_YUVA444P12
#define AV_PIX_FMT_YUV444P16
#define AV_PIX_FMT_YUV444P10
typedef void(RENAME(mix_any_func_type))
Describe the class of an AVClass context structure.
A link between two filters.
int w
agreed upon image width
int h
agreed upon image height
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.
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
void(* read_line[2])(AVFrame *in, int nb_line, LineItem *line, int lp, int w)
#define av_realloc_f(p, o, n)
timestamp utils, mostly useful for debugging/logging purposes
static float mean(const float *input, int size)
static av_always_inline int diff(const uint32_t a, const uint32_t b)
#define CLOCK_BITSIZE_MIN
static const AVOption readeia608_options[]
static float meanf(const LineItem *line, int len)
AVFILTER_DEFINE_CLASS(readeia608)
#define READ_LINE(type, name)
static void build_histogram(ReadEIA608Context *s, ScanItem *scan, const LineItem *line, int len)
static int query_formats(AVFilterContext *ctx)
static int config_input(AVFilterLink *inlink)
static const AVFilterPad readeia608_outputs[]
static void extract_line(AVFilterContext *ctx, AVFrame *in, ScanItem *scan, int w, int nb_line)
static void find_black_and_white(ReadEIA608Context *s, ScanItem *scan)
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
static int periods(const LineItem *line, CodeItem *code, int len)
static int config_filter(AVFilterContext *ctx, int start, int end)
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
static av_cold void uninit(AVFilterContext *ctx)
static float stddevf(const LineItem *line, int len)
AVFilter ff_vf_readeia608
static void dump_code(AVFilterContext *ctx, ScanItem *scan, int len, int item)
static int extract_lines(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
#define CLOCK_BITSIZE_MAX
static const AVFilterPad readeia608_inputs[]
static void thresholding(ReadEIA608Context *s, ScanItem *scan, LineItem *line, int lag, float threshold, float influence, int len)