avfilter/vf_readeia608: add support for slice threads
This commit is contained in:
Paul B Mahol
parent
97bc6900e6
commit
278984b343
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@ -57,20 +57,28 @@ typedef struct CodeItem {
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int size;
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} CodeItem;
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typedef struct ReadEIA608Context {
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const AVClass *class;
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int start, end;
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int nb_found;
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typedef struct ScanItem {
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int nb_line;
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int found;
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int white;
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int black;
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uint64_t histogram[256];
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uint8_t byte[2];
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CodeItem *code;
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LineItem *line;
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} ScanItem;
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typedef struct ReadEIA608Context {
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const AVClass *class;
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int start, end;
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float spw;
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int chp;
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int lp;
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uint64_t histogram[256];
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CodeItem *code;
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LineItem *line;
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int nb_allocated;
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ScanItem *scan;
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} ReadEIA608Context;
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#define OFFSET(x) offsetof(ReadEIA608Context, x)
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@ -105,53 +113,80 @@ static int query_formats(AVFilterContext *ctx)
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return ff_set_common_formats(ctx, formats);
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}
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static int config_input(AVFilterLink *inlink)
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static int config_filter(AVFilterContext *ctx, int start, int end)
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{
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AVFilterContext *ctx = inlink->dst;
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ReadEIA608Context *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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int size = inlink->w + LAG;
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if (s->end >= inlink->h) {
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if (end >= inlink->h) {
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av_log(ctx, AV_LOG_WARNING, "Last line to scan too large, clipping.\n");
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s->end = inlink->h - 1;
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end = inlink->h - 1;
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}
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if (s->start > s->end) {
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if (start > end) {
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av_log(ctx, AV_LOG_ERROR, "Invalid range.\n");
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return AVERROR(EINVAL);
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}
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s->line = av_calloc(size, sizeof(*s->line));
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s->code = av_calloc(size, sizeof(*s->code));
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if (!s->line || !s->code)
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return AVERROR(ENOMEM);
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if (s->nb_allocated < end - start + 1) {
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const int diff = end - start + 1 - s->nb_allocated;
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s->scan = av_realloc_f(s->scan, end - start + 1, sizeof(*s->scan));
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if (!s->scan)
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return AVERROR(ENOMEM);
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memset(&s->scan[s->nb_allocated], 0, diff * sizeof(*s->scan));
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s->nb_allocated = end - start + 1;
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}
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for (int i = 0; i < s->nb_allocated; i++) {
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ScanItem *scan = &s->scan[i];
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if (!scan->line)
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scan->line = av_calloc(size, sizeof(*scan->line));
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if (!scan->code)
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scan->code = av_calloc(size, sizeof(*scan->code));
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if (!scan->line || !scan->code)
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return AVERROR(ENOMEM);
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}
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s->start = start;
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s->end = end;
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return 0;
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}
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static void build_histogram(ReadEIA608Context *s, const LineItem *line, int len)
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static int config_input(AVFilterLink *inlink)
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{
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memset(s->histogram, 0, sizeof(s->histogram));
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AVFilterContext *ctx = inlink->dst;
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ReadEIA608Context *s = ctx->priv;
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for (int i = LAG; i < len + LAG; i++)
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s->histogram[line[i].input]++;
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return config_filter(ctx, s->start, s->end);
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}
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static void find_black_and_white(ReadEIA608Context *s)
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static void build_histogram(ReadEIA608Context *s, ScanItem *scan, const LineItem *line, int len)
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{
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memset(scan->histogram, 0, sizeof(scan->histogram));
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for (int i = LAG; i < len + LAG; i++)
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scan->histogram[line[i].input]++;
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}
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static void find_black_and_white(ReadEIA608Context *s, ScanItem *scan)
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{
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int start = 0, end = 0, middle;
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int black = 0, white = 0;
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int cnt;
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for (int i = 0; i < 256; i++) {
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if (s->histogram[i]) {
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if (scan->histogram[i]) {
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start = i;
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break;
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}
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}
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for (int i = 255; i >= 0; i--) {
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if (s->histogram[i]) {
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if (scan->histogram[i]) {
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end = i;
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break;
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}
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@ -161,22 +196,22 @@ static void find_black_and_white(ReadEIA608Context *s)
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cnt = 0;
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for (int i = start; i <= middle; i++) {
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if (s->histogram[i] > cnt) {
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cnt = s->histogram[i];
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if (scan->histogram[i] > cnt) {
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cnt = scan->histogram[i];
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black = i;
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}
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}
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cnt = 0;
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for (int i = end; i >= middle; i--) {
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if (s->histogram[i] > cnt) {
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cnt = s->histogram[i];
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if (scan->histogram[i] > cnt) {
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cnt = scan->histogram[i];
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white = i;
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}
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}
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s->black = black;
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s->white = white;
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scan->black = black;
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scan->white = white;
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}
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static float meanf(const LineItem *line, int len)
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@ -202,7 +237,7 @@ static float stddevf(const LineItem *line, int len)
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return sqrtf(standard_deviation / (len - 1));
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}
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static void thresholding(ReadEIA608Context *s, LineItem *line,
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static void thresholding(ReadEIA608Context *s, ScanItem *scan, LineItem *line,
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int lag, float threshold, float influence, int len)
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{
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for (int i = lag; i < len + lag; i++) {
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@ -230,8 +265,8 @@ static void thresholding(ReadEIA608Context *s, LineItem *line,
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} else {
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int distance_from_black, distance_from_white;
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distance_from_black = FFABS(line[i].input - s->black);
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distance_from_white = FFABS(line[i].input - s->white);
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distance_from_black = FFABS(line[i].input - scan->black);
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distance_from_white = FFABS(line[i].input - scan->white);
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line[i].output = distance_from_black <= distance_from_white ? 0 : 255;
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}
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@ -264,29 +299,28 @@ static int periods(const LineItem *line, CodeItem *code, int len)
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return cnt + 1;
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}
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static void dump_code(AVFilterContext *ctx, int len, int item)
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static void dump_code(AVFilterContext *ctx, ScanItem *scan, int len, int item)
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{
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ReadEIA608Context *s = ctx->priv;
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av_log(ctx, AV_LOG_DEBUG, "%d:", item);
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for (int i = 0; i < len; i++) {
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av_log(ctx, AV_LOG_DEBUG, " %03d", s->code[i].size);
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av_log(ctx, AV_LOG_DEBUG, " %03d", scan->code[i].size);
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}
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av_log(ctx, AV_LOG_DEBUG, "\n");
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}
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static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
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static void extract_line(AVFilterContext *ctx, AVFrame *in, ScanItem *scan, int w, int nb_line)
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{
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ReadEIA608Context *s = ctx->priv;
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LineItem *line = s->line;
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LineItem *line = scan->line;
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int i, j, ch, len;
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const uint8_t *src;
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uint8_t byte[2] = { 0 };
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uint8_t codes[19] = { 0 };
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float bit_size = 0.f;
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int parity;
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memset(line, 0, (w + LAG) * sizeof(*line));
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scan->byte[0] = scan->byte[1] = 0;
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scan->found = 0;
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src = &in->data[0][nb_line * in->linesize[0]];
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if (s->lp) {
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@ -306,42 +340,42 @@ static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
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}
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}
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build_histogram(s, line, w);
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find_black_and_white(s);
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if (s->white - s->black < 5)
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build_histogram(s, scan, line, w);
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find_black_and_white(s, scan);
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if (scan->white - scan->black < 5)
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return;
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thresholding(s, line, LAG, 1, 0, w);
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len = periods(line, s->code, w);
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dump_code(ctx, len, nb_line);
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thresholding(s, scan, line, LAG, 1, 0, w);
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len = periods(line, scan->code, w);
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dump_code(ctx, scan, len, nb_line);
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if (len < 15 ||
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s->code[14].bit != 0 ||
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w / (float)s->code[14].size < SYNC_BITSIZE_MIN ||
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w / (float)s->code[14].size > SYNC_BITSIZE_MAX) {
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scan->code[14].bit != 0 ||
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w / (float)scan->code[14].size < SYNC_BITSIZE_MIN ||
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w / (float)scan->code[14].size > SYNC_BITSIZE_MAX) {
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return;
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}
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for (i = 14; i < len; i++) {
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bit_size += s->code[i].size;
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bit_size += scan->code[i].size;
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}
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bit_size /= 19.f;
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for (i = 1; i < 14; i++) {
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if (s->code[i].size / bit_size > CLOCK_BITSIZE_MAX ||
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s->code[i].size / bit_size < CLOCK_BITSIZE_MIN) {
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if (scan->code[i].size / bit_size > CLOCK_BITSIZE_MAX ||
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scan->code[i].size / bit_size < CLOCK_BITSIZE_MIN) {
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return;
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}
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}
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if (s->code[15].size / bit_size < 0.45f) {
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if (scan->code[15].size / bit_size < 0.45f) {
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return;
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}
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for (j = 0, i = 14; i < len; i++) {
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int run, bit;
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run = lrintf(s->code[i].size / bit_size);
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bit = s->code[i].bit;
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run = lrintf(scan->code[i].size / bit_size);
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bit = scan->code[i].bit;
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for (int k = 0; j < 19 && k < run; k++) {
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codes[j++] = bit;
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@ -361,33 +395,37 @@ static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
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} else {
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b = 0;
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}
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byte[ch] |= b << i;
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scan->byte[ch] |= b << i;
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}
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if (s->chp) {
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if (!(parity & 1)) {
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byte[ch] = 0x7F;
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scan->byte[ch] = 0x7F;
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}
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}
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}
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{
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uint8_t key[128], value[128];
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scan->nb_line = nb_line;
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scan->found = 1;
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}
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//snprintf(key, sizeof(key), "lavfi.readeia608.%d.bits", s->nb_found);
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//snprintf(value, sizeof(value), "0b%d%d%d%d%d%d%d%d 0b%d%d%d%d%d%d%d%d", codes[3]==255,codes[4]==255,codes[5]==255,codes[6]==255,codes[7]==255,codes[8]==255,codes[9]==255,codes[10]==255,codes[11]==255,codes[12]==255,codes[13]==255,codes[14]==255,codes[15]==255,codes[16]==255,codes[17]==255,codes[18]==255);
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//av_dict_set(&in->metadata, key, value, 0);
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static int extract_lines(AVFilterContext *ctx, void *arg,
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int job, int nb_jobs)
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{
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ReadEIA608Context *s = ctx->priv;
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AVFilterLink *inlink = ctx->inputs[0];
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const int h = s->end - s->start + 1;
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const int start = (h * job) / nb_jobs;
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const int end = (h * (job+1)) / nb_jobs;
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AVFrame *in = arg;
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snprintf(key, sizeof(key), "lavfi.readeia608.%d.cc", s->nb_found);
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snprintf(value, sizeof(value), "0x%02X%02X", byte[0], byte[1]);
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av_dict_set(&in->metadata, key, value, 0);
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for (int i = start; i < end; i++) {
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ScanItem *scan = &s->scan[i];
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snprintf(key, sizeof(key), "lavfi.readeia608.%d.line", s->nb_found);
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snprintf(value, sizeof(value), "%d", nb_line);
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av_dict_set(&in->metadata, key, value, 0);
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extract_line(ctx, in, scan, inlink->w, i);
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}
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s->nb_found++;
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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@ -395,11 +433,33 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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AVFilterContext *ctx = inlink->dst;
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AVFilterLink *outlink = ctx->outputs[0];
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ReadEIA608Context *s = ctx->priv;
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int i;
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int nb_found;
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s->nb_found = 0;
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for (i = s->start; i <= s->end; i++)
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extract_line(ctx, in, inlink->w, i);
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ctx->internal->execute(ctx, extract_lines, in, NULL, FFMIN(FFMAX(s->end - s->start + 1, 1),
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ff_filter_get_nb_threads(ctx)));
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nb_found = 0;
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for (int i = 0; i < s->end - s->start + 1; i++) {
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ScanItem *scan = &s->scan[i];
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uint8_t key[128], value[128];
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if (!scan->found)
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continue;
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//snprintf(key, sizeof(key), "lavfi.readeia608.%d.bits", nb_found);
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//snprintf(value, sizeof(value), "0b%d%d%d%d%d%d%d%d 0b%d%d%d%d%d%d%d%d", codes[3]==255,codes[4]==255,codes[5]==255,codes[6]==255,codes[7]==255,codes[8]==255,codes[9]==255,codes[10]==255,codes[11]==255,codes[12]==255,codes[13]==255,codes[14]==255,codes[15]==255,codes[16]==255,codes[17]==255,codes[18]==255);
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//av_dict_set(&in->metadata, key, value, 0);
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snprintf(key, sizeof(key), "lavfi.readeia608.%d.cc", nb_found);
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snprintf(value, sizeof(value), "0x%02X%02X", scan->byte[0], scan->byte[1]);
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av_dict_set(&in->metadata, key, value, 0);
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snprintf(key, sizeof(key), "lavfi.readeia608.%d.line", nb_found);
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snprintf(value, sizeof(value), "%d", scan->nb_line);
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av_dict_set(&in->metadata, key, value, 0);
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nb_found++;
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}
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return ff_filter_frame(outlink, in);
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}
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@ -408,8 +468,34 @@ static av_cold void uninit(AVFilterContext *ctx)
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{
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ReadEIA608Context *s = ctx->priv;
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av_freep(&s->code);
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av_freep(&s->line);
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for (int i = 0; i < s->nb_allocated; i++) {
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ScanItem *scan = &s->scan[i];
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av_freep(&scan->code);
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av_freep(&scan->line);
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}
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s->nb_allocated = 0;
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av_freep(&s->scan);
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}
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static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
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char *res, int res_len, int flags)
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{
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ReadEIA608Context *s = ctx->priv;
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int ret, start = s->start, end = s->end;
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ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
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if (ret < 0)
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return ret;
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ret = config_filter(ctx, s->start, s->end);
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if (ret < 0) {
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s->start = start;
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s->end = end;
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}
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return 0;
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}
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static const AVFilterPad readeia608_inputs[] = {
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@ -439,6 +525,6 @@ AVFilter ff_vf_readeia608 = {
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.inputs = readeia608_inputs,
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.outputs = readeia608_outputs,
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.uninit = uninit,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
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.process_command = ff_filter_process_command,
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
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.process_command = process_command,
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};
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