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 94 {
"scan_max",
"set to which line to scan for codes",
OFFSET(end),
AV_OPT_TYPE_INT, {.i64=29}, 0, INT_MAX, FLAGS },
95 {
"spw",
"set ratio of width reserved for sync code detection",
OFFSET(spw),
AV_OPT_TYPE_FLOAT, {.dbl=.27}, 0.1, 0.7, FLAGS },
140 if (end >= inlink->
h) {
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++)
244 float m =
meanf(line, len);
245 float standard_deviation = 0.f;
247 for (
int i = 0;
i <
len;
i++)
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++) {
279 int distance_from_black, distance_from_white;
284 line[
i].
output = distance_from_black <= distance_from_white ? 0 : 255;
297 memset(code, 0, len *
sizeof(*code));
299 for (
int i =
LAG + 1;
i < len +
LAG;
i++) {
301 code[cnt].
size =
i - last;
302 code[cnt].
bit = hold;
309 code[cnt].
size = LAG + len - last;
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]; \ 373 float bit_size = 0.f;
376 memset(line, 0, (w +
LAG) *
sizeof(*line));
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++) {
428 for (parity = 0, i = 0; i < 8; i++) {
429 int b = codes[3 + ch * 8 +
i];
437 scan->
byte[ch] |= b <<
i;
442 scan->
byte[ch] = 0x7F;
452 int job,
int nb_jobs)
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++) {
492 snprintf(key,
sizeof(key),
"lavfi.readeia608.%d.cc", nb_found);
496 snprintf(key,
sizeof(key),
"lavfi.readeia608.%d.line", nb_found);
523 char *res,
int res_len,
int flags)
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,
565 .
inputs = readeia608_inputs,
#define AV_PIX_FMT_YUVA422P16
static void find_black_and_white(ReadEIA608Context *s, ScanItem *scan)
#define AV_PIX_FMT_YUV440P10
#define AV_PIX_FMT_YUVA422P9
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
#define av_realloc_f(p, o, n)
This structure describes decoded (raw) audio or video data.
static void dump_code(AVFilterContext *ctx, ScanItem *scan, int len, int item)
#define AV_PIX_FMT_YUVA420P10
#define AV_PIX_FMT_YUV444P14
#define AV_PIX_FMT_YUVA422P10
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
#define AV_LOG_WARNING
Something somehow does not look correct.
Main libavfilter public API header.
#define CLOCK_BITSIZE_MAX
int h
agreed upon image height
static int periods(const LineItem *line, CodeItem *code, int len)
static float meanf(const LineItem *line, int len)
#define AV_PIX_FMT_YUV420P12
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
#define AV_PIX_FMT_GRAY10
#define AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC
Some filters support a generic "enable" expression option that can be used to enable or disable a fil...
const char * name
Pad name.
#define AV_PIX_FMT_GRAY12
static const AVOption readeia608_options[]
AVFilterLink ** inputs
array of pointers to input links
int ff_filter_frame(AVFilterLink *link, AVFrame *frame)
Send a frame of data to the next filter.
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
static int config_input(AVFilterLink *inlink)
timestamp utils, mostly useful for debugging/logging purposes
GLsizei GLboolean const GLfloat * value
static int config_filter(AVFilterContext *ctx, int start, int end)
#define AV_PIX_FMT_YUVA420P9
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
#define READ_LINE(type, name)
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
AVDictionary * metadata
metadata.
#define AV_PIX_FMT_YUV444P16
static av_cold void uninit(AVFilterContext *ctx)
#define AV_PIX_FMT_YUV422P12
#define AV_PIX_FMT_YUVA420P16
static __device__ float fabsf(float a)
A filter pad used for either input or output.
A link between two filters.
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
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...
void * priv
private data for use by the filter
#define AVFILTER_FLAG_SLICE_THREADS
The filter supports multithreading by splitting frames into multiple parts and processing them concur...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
AVFilter ff_vf_readeia608
static const AVFilterPad readeia608_outputs[]
#define AV_PIX_FMT_YUVA444P16
#define AV_PIX_FMT_YUV444P10
#define CLOCK_BITSIZE_MIN
static float mean(const float *input, int size)
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
int w
agreed upon image width
common internal API header
#define AV_PIX_FMT_YUV422P9
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 ff_filter_get_nb_threads(AVFilterContext *ctx)
Get number of threads for current filter instance.
#define AV_PIX_FMT_GRAY16
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
#define AV_PIX_FMT_YUVA444P12
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
static const AVFilterPad readeia608_inputs[]
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
#define AV_PIX_FMT_YUVA444P10
AVFILTER_DEFINE_CLASS(readeia608)
#define AV_PIX_FMT_YUV444P9
static const AVFilterPad outputs[]
#define AV_PIX_FMT_YUV420P16
static float stddevf(const LineItem *line, int len)
#define AV_PIX_FMT_YUV420P14
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_WB16 unsigned int_TMPL byte
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
#define AV_PIX_FMT_GRAY14
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.
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
#define AV_PIX_FMT_YUV420P10
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Describe the class of an AVClass context structure.
static int64_t read_line(AVBPrint *buf, AVIOContext *pb)
const char * name
Filter name.
#define AV_PIX_FMT_YUV440P12
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args, char *res, int res_len, int flags)
#define AV_PIX_FMT_YUV420P9
static void build_histogram(ReadEIA608Context *s, ScanItem *scan, const LineItem *line, int len)
AVFilterLink ** outputs
array of pointers to output links
#define AV_PIX_FMT_YUV422P14
#define flags(name, subs,...)
and forward the test the status of outputs and forward it to the corresponding return FFERROR_NOT_READY If the filters stores internally one or a few frame for some it can consider them to be part of the FIFO and delay acknowledging a status change accordingly Example code
AVFilterInternal * internal
An opaque struct for libavfilter internal use.
#define AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV444P12
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
The official guide to swscale for confused that consecutive non overlapping rectangles of slice_bottom special converter These generally are unscaled converters of common like for each output line the vertical scaler pulls lines from a ring buffer When the ring buffer does not contain the wanted line
#define bit(string, value)
#define AV_PIX_FMT_YUVA444P9
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
static int query_formats(AVFilterContext *ctx)
avfilter_execute_func * execute
static av_always_inline int diff(const uint32_t a, const uint32_t b)
AVFilterContext * dst
dest filter
void(* read_line[2])(AVFrame *in, int nb_line, LineItem *line, int lp, int w)
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
static int extract_lines(AVFilterContext *ctx, void *arg, int job, int nb_jobs)
static void extract_line(AVFilterContext *ctx, AVFrame *in, ScanItem *scan, int w, int nb_line)
static void thresholding(ReadEIA608Context *s, ScanItem *scan, LineItem *line, int lag, float threshold, float influence, int len)
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.
AVPixelFormat
Pixel format.
#define AV_PIX_FMT_YUV422P16
#define AV_PIX_FMT_YUVA422P12