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Code Issues Releases Activity

avfilter/vf_readeia608: add support for slice threads

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This commit is contained in:
Paul B Mahol 2020-11-24 22:14:14 +01:00
parent 97bc6900e6
commit 278984b343
1 changed files with 163 additions and 77 deletions
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240
libavfilter/vf_readeia608.c
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@ -57,20 +57,28 @@ typedef struct CodeItem {
int size;
} CodeItem;
typedef struct ReadEIA608Context {
const AVClass *class;
int start, end;
int nb_found;
typedef struct ScanItem {
int nb_line;
int found;
int white;
int black;
uint64_t histogram[256];
uint8_t byte[2];
CodeItem *code;
LineItem *line;
} ScanItem;
typedef struct ReadEIA608Context {
const AVClass *class;
int start, end;
float spw;
int chp;
int lp;
uint64_t histogram[256];
CodeItem *code;
LineItem *line;
int nb_allocated;
ScanItem *scan;
} ReadEIA608Context;
#define OFFSET(x) offsetof(ReadEIA608Context, x)
@ -105,53 +113,80 @@ static int query_formats(AVFilterContext *ctx)
return ff_set_common_formats(ctx, formats);
}
static int config_input(AVFilterLink *inlink)
static int config_filter(AVFilterContext *ctx, int start, int end)
{
AVFilterContext *ctx = inlink->dst;
ReadEIA608Context *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
int size = inlink->w + LAG;
if (s->end >= inlink->h) {
if (end >= inlink->h) {
av_log(ctx, AV_LOG_WARNING, "Last line to scan too large, clipping.\n");
s->end = inlink->h - 1;
end = inlink->h - 1;
}
if (s->start > s->end) {
if (start > end) {
av_log(ctx, AV_LOG_ERROR, "Invalid range.\n");
return AVERROR(EINVAL);
}
s->line = av_calloc(size, sizeof(*s->line));
s->code = av_calloc(size, sizeof(*s->code));
if (!s->line || !s->code)
return AVERROR(ENOMEM);
if (s->nb_allocated < end - start + 1) {
const int diff = end - start + 1 - s->nb_allocated;
s->scan = av_realloc_f(s->scan, end - start + 1, sizeof(*s->scan));
if (!s->scan)
return AVERROR(ENOMEM);
memset(&s->scan[s->nb_allocated], 0, diff * sizeof(*s->scan));
s->nb_allocated = end - start + 1;
}
for (int i = 0; i < s->nb_allocated; i++) {
ScanItem *scan = &s->scan[i];
if (!scan->line)
scan->line = av_calloc(size, sizeof(*scan->line));
if (!scan->code)
scan->code = av_calloc(size, sizeof(*scan->code));
if (!scan->line || !scan->code)
return AVERROR(ENOMEM);
}
s->start = start;
s->end = end;
return 0;
}
static void build_histogram(ReadEIA608Context *s, const LineItem *line, int len)
static int config_input(AVFilterLink *inlink)
{
memset(s->histogram, 0, sizeof(s->histogram));
AVFilterContext *ctx = inlink->dst;
ReadEIA608Context *s = ctx->priv;
for (int i = LAG; i < len + LAG; i++)
s->histogram[line[i].input]++;
return config_filter(ctx, s->start, s->end);
}
static void find_black_and_white(ReadEIA608Context *s)
static void build_histogram(ReadEIA608Context *s, ScanItem *scan, const LineItem *line, int len)
{
memset(scan->histogram, 0, sizeof(scan->histogram));
for (int i = LAG; i < len + LAG; i++)
scan->histogram[line[i].input]++;
}
static void find_black_and_white(ReadEIA608Context *s, ScanItem *scan)
{
int start = 0, end = 0, middle;
int black = 0, white = 0;
int cnt;
for (int i = 0; i < 256; i++) {
if (s->histogram[i]) {
if (scan->histogram[i]) {
start = i;
break;
}
}
for (int i = 255; i >= 0; i--) {
if (s->histogram[i]) {
if (scan->histogram[i]) {
end = i;
break;
}
@ -161,22 +196,22 @@ static void find_black_and_white(ReadEIA608Context *s)
cnt = 0;
for (int i = start; i <= middle; i++) {
if (s->histogram[i] > cnt) {
cnt = s->histogram[i];
if (scan->histogram[i] > cnt) {
cnt = scan->histogram[i];
black = i;
}
}
cnt = 0;
for (int i = end; i >= middle; i--) {
if (s->histogram[i] > cnt) {
cnt = s->histogram[i];
if (scan->histogram[i] > cnt) {
cnt = scan->histogram[i];
white = i;
}
}
s->black = black;
s->white = white;
scan->black = black;
scan->white = white;
}
static float meanf(const LineItem *line, int len)
@ -202,7 +237,7 @@ static float stddevf(const LineItem *line, int len)
return sqrtf(standard_deviation / (len - 1));
}
static void thresholding(ReadEIA608Context *s, LineItem *line,
static void thresholding(ReadEIA608Context *s, ScanItem *scan, LineItem *line,
int lag, float threshold, float influence, int len)
{
for (int i = lag; i < len + lag; i++) {
@ -230,8 +265,8 @@ static void thresholding(ReadEIA608Context *s, LineItem *line,
} else {
int distance_from_black, distance_from_white;
distance_from_black = FFABS(line[i].input - s->black);
distance_from_white = FFABS(line[i].input - s->white);
distance_from_black = FFABS(line[i].input - scan->black);
distance_from_white = FFABS(line[i].input - scan->white);
line[i].output = distance_from_black <= distance_from_white ? 0 : 255;
}
@ -264,29 +299,28 @@ static int periods(const LineItem *line, CodeItem *code, int len)
return cnt + 1;
}
static void dump_code(AVFilterContext *ctx, int len, int item)
static void dump_code(AVFilterContext *ctx, ScanItem *scan, int len, int item)
{
ReadEIA608Context *s = ctx->priv;
av_log(ctx, AV_LOG_DEBUG, "%d:", item);
for (int i = 0; i < len; i++) {
av_log(ctx, AV_LOG_DEBUG, " %03d", s->code[i].size);
av_log(ctx, AV_LOG_DEBUG, " %03d", scan->code[i].size);
}
av_log(ctx, AV_LOG_DEBUG, "\n");
}
static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
static void extract_line(AVFilterContext *ctx, AVFrame *in, ScanItem *scan, int w, int nb_line)
{
ReadEIA608Context *s = ctx->priv;
LineItem *line = s->line;
LineItem *line = scan->line;
int i, j, ch, len;
const uint8_t *src;
uint8_t byte[2] = { 0 };
uint8_t codes[19] = { 0 };
float bit_size = 0.f;
int parity;
memset(line, 0, (w + LAG) * sizeof(*line));
scan->byte[0] = scan->byte[1] = 0;
scan->found = 0;
src = &in->data[0][nb_line * in->linesize[0]];
if (s->lp) {
@ -306,42 +340,42 @@ static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
}
}
build_histogram(s, line, w);
find_black_and_white(s);
if (s->white - s->black < 5)
build_histogram(s, scan, line, w);
find_black_and_white(s, scan);
if (scan->white - scan->black < 5)
return;
thresholding(s, line, LAG, 1, 0, w);
len = periods(line, s->code, w);
dump_code(ctx, len, nb_line);
thresholding(s, scan, line, LAG, 1, 0, w);
len = periods(line, scan->code, w);
dump_code(ctx, scan, len, nb_line);
if (len < 15 ||
s->code[14].bit != 0 ||
w / (float)s->code[14].size < SYNC_BITSIZE_MIN ||
w / (float)s->code[14].size > SYNC_BITSIZE_MAX) {
scan->code[14].bit != 0 ||
w / (float)scan->code[14].size < SYNC_BITSIZE_MIN ||
w / (float)scan->code[14].size > SYNC_BITSIZE_MAX) {
return;
}
for (i = 14; i < len; i++) {
bit_size += s->code[i].size;
bit_size += scan->code[i].size;
}
bit_size /= 19.f;
for (i = 1; i < 14; i++) {
if (s->code[i].size / bit_size > CLOCK_BITSIZE_MAX ||
s->code[i].size / bit_size < CLOCK_BITSIZE_MIN) {
if (scan->code[i].size / bit_size > CLOCK_BITSIZE_MAX ||
scan->code[i].size / bit_size < CLOCK_BITSIZE_MIN) {
return;
}
}
if (s->code[15].size / bit_size < 0.45f) {
if (scan->code[15].size / bit_size < 0.45f) {
return;
}
for (j = 0, i = 14; i < len; i++) {
int run, bit;
run = lrintf(s->code[i].size / bit_size);
bit = s->code[i].bit;
run = lrintf(scan->code[i].size / bit_size);
bit = scan->code[i].bit;
for (int k = 0; j < 19 && k < run; k++) {
codes[j++] = bit;
@ -361,33 +395,37 @@ static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
} else {
b = 0;
}
byte[ch] |= b << i;
scan->byte[ch] |= b << i;
}
if (s->chp) {
if (!(parity & 1)) {
byte[ch] = 0x7F;
scan->byte[ch] = 0x7F;
}
}
}
{
uint8_t key[128], value[128];
scan->nb_line = nb_line;
scan->found = 1;
}
//snprintf(key, sizeof(key), "lavfi.readeia608.%d.bits", s->nb_found);
//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);
//av_dict_set(&in->metadata, key, value, 0);
static int extract_lines(AVFilterContext *ctx, void *arg,
int job, int nb_jobs)
{
ReadEIA608Context *s = ctx->priv;
AVFilterLink *inlink = ctx->inputs[0];
const int h = s->end - s->start + 1;
const int start = (h * job) / nb_jobs;
const int end = (h * (job+1)) / nb_jobs;
AVFrame *in = arg;
snprintf(key, sizeof(key), "lavfi.readeia608.%d.cc", s->nb_found);
snprintf(value, sizeof(value), "0x%02X%02X", byte[0], byte[1]);
av_dict_set(&in->metadata, key, value, 0);
for (int i = start; i < end; i++) {
ScanItem *scan = &s->scan[i];
snprintf(key, sizeof(key), "lavfi.readeia608.%d.line", s->nb_found);
snprintf(value, sizeof(value), "%d", nb_line);
av_dict_set(&in->metadata, key, value, 0);
extract_line(ctx, in, scan, inlink->w, i);
}
s->nb_found++;
return 0;
}
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
@ -395,11 +433,33 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
AVFilterContext *ctx = inlink->dst;
AVFilterLink *outlink = ctx->outputs[0];
ReadEIA608Context *s = ctx->priv;
int i;
int nb_found;
s->nb_found = 0;
for (i = s->start; i <= s->end; i++)
extract_line(ctx, in, inlink->w, i);
ctx->internal->execute(ctx, extract_lines, in, NULL, FFMIN(FFMAX(s->end - s->start + 1, 1),
ff_filter_get_nb_threads(ctx)));
nb_found = 0;
for (int i = 0; i < s->end - s->start + 1; i++) {
ScanItem *scan = &s->scan[i];
uint8_t key[128], value[128];
if (!scan->found)
continue;
//snprintf(key, sizeof(key), "lavfi.readeia608.%d.bits", nb_found);
//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);
//av_dict_set(&in->metadata, key, value, 0);
snprintf(key, sizeof(key), "lavfi.readeia608.%d.cc", nb_found);
snprintf(value, sizeof(value), "0x%02X%02X", scan->byte[0], scan->byte[1]);
av_dict_set(&in->metadata, key, value, 0);
snprintf(key, sizeof(key), "lavfi.readeia608.%d.line", nb_found);
snprintf(value, sizeof(value), "%d", scan->nb_line);
av_dict_set(&in->metadata, key, value, 0);
nb_found++;
}
return ff_filter_frame(outlink, in);
}
@ -408,8 +468,34 @@ static av_cold void uninit(AVFilterContext *ctx)
{
ReadEIA608Context *s = ctx->priv;
av_freep(&s->code);
av_freep(&s->line);
for (int i = 0; i < s->nb_allocated; i++) {
ScanItem *scan = &s->scan[i];
av_freep(&scan->code);
av_freep(&scan->line);
}
s->nb_allocated = 0;
av_freep(&s->scan);
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
ReadEIA608Context *s = ctx->priv;
int ret, start = s->start, end = s->end;
ret = ff_filter_process_command(ctx, cmd, args, res, res_len, flags);
if (ret < 0)
return ret;
ret = config_filter(ctx, s->start, s->end);
if (ret < 0) {
s->start = start;
s->end = end;
}
return 0;
}
static const AVFilterPad readeia608_inputs[] = {
@ -439,6 +525,6 @@ AVFilter ff_vf_readeia608 = {
.inputs = readeia608_inputs,
.outputs = readeia608_outputs,
.uninit = uninit,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
.process_command = ff_filter_process_command,
.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC | AVFILTER_FLAG_SLICE_THREADS,
.process_command = process_command,
};