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timepack.c
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timepack.c
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#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#define MAX_KEYPOINTS 1024
//#define DO_RANGES
static void usage(const char *name) {
printf("Usage: %s infile outfile\n", name);
}
typedef struct {
int time;
float columns[1];
} Keypoint;
static struct {
int columns, pattern_size;
float *column_ranges;
int keypoint_size;
char *keypoints_storage;
int rows;
} data;
int timelineRead(FILE *f) {
if (2 != fscanf(f, "%d %d", &data.columns, &data.pattern_size)) {
printf("Cannot read columns number and pattern size\n");
return 0;
}
if (data.columns < 1) {
printf("column count %d is not valid\n", data.columns);
return 0;
}
if (data.pattern_size < 1) {
printf("pattern size %d is not valid\n", data.pattern_size);
return 0;
}
printf("Input declares %d columns\n", data.columns);
data.column_ranges = malloc(data.columns * sizeof(float));
for (int i = 0; i < data.columns; ++i) {
#ifdef DO_RANGES
data.column_ranges[i] = 0;
#else
data.column_ranges[i] = 63.5f;
#endif
}
data.keypoint_size = sizeof(Keypoint) + sizeof(float) * (data.columns - 1);
data.keypoints_storage = malloc(data.keypoint_size * MAX_KEYPOINTS);
int k = 0;
while (!feof(f)) {
if (k >= MAX_KEYPOINTS) {
printf("Too many keypoints, max is %d", MAX_KEYPOINTS);
return 0;
}
int pat, tick, grain;
const int rd = fscanf(f, "%d:%d.%d", &pat, &tick, &grain);
if (rd == -1)
break;
if (3 != rd) {
printf("Row %d: Cannot read time spec\n", k + 1);
return 0;
}
Keypoint *keypoint = (Keypoint*)(data.keypoints_storage + data.keypoint_size * k);
keypoint->time = ((pat * data.pattern_size + tick) << 1) + grain;
for (int i = 0; i < data.columns; ++i) {
if (1 != fscanf(f, "%f", keypoint->columns + i)) {
printf("Cannot read column %d/%d of row %d\n", i + 1, data.columns, k);
return 0;
}
#ifdef DO_RANGES
const float absval = fabs(keypoint->columns[i]);
if (data.column_ranges[i] < absval)
data.column_ranges[i] = absval;
#endif
if (keypoint->columns[i] < -data.column_ranges[i] || keypoint->columns[i] > data.column_ranges[i]) {
printf("Column %d/%d row %d value %f is outside [%f, %f]\n",
i + 1, data.columns, k, keypoint->columns[i], -data.column_ranges[i], data.column_ranges[i]);
return 0;
}
}
++k;
}
data.rows = k;
for (int i = 0; i < data.columns; ++i) {
printf("column %d range: [%f %f]\n", i, -data.column_ranges[i], data.column_ranges[i]);
}
return 1;
}
int timelineWrite(FILE *f) {
fprintf(f, "/* AUTOGENERATED BY " __FILE__ ", DO NOT MODIFY */\n");
fprintf(f, "#define TIMELINE_COLS (%d)\n", data.columns);
fprintf(f, "#define TIMELINE_ROWS (%d)\n", data.rows);
fprintf(f, "#pragma data_seg(\".timeline_data\")\n");
#ifdef DO_RANGES
fprintf(f, "static const unsigned char timeline_ranges[%d] = {\n\t", data.columns);
for (int i = 0; i < data.columns; ++i) {
const float r = data.column_ranges[i];
if (r > 255.f) {
printf("Error at col %d: range is too big: %f > 255", i + 1, r);
return 0;
}
data.column_ranges[i] = ceilf(r);
fprintf(f, "%d%s", (int)(data.column_ranges[i]), (i != (data.columns-1)) ? ", " : "};\n");
}
#endif
fprintf(f, "static const unsigned char timeline_times[%d] = {\n\t", data.rows);
int prevtime = 0;
for (int i = 0; i < data.rows; ++i) {
const Keypoint *keypoint = (Keypoint*)(data.keypoints_storage + data.keypoint_size * i);
const int deltatime = keypoint->time - prevtime;
if (deltatime > 255) {
printf("Error at row %d: dt=%d, but it should be less than %d (tick/4)", i + 1, deltatime, 255);
return 0;
}
if (deltatime < 0) {
printf("Error at row %d: dt=%d, but it should be at least %d (tick/4)", i + 1, deltatime, 0);
return 0;
}
fprintf(f, "%d%s", deltatime, (i != (data.rows - 1)) ? ", " : "\n};\n");
prevtime = keypoint->time;
}
fprintf(f, "static const unsigned char timeline_values[%d] = {\n\t", data.columns * data.rows);
for (int j = 0; j < data.columns; ++j) {
for (int i = 0; i < data.rows; ++i) {
const Keypoint *keypoint = (Keypoint*)(data.keypoints_storage + data.keypoint_size * i);
const float r = data.column_ranges[j];
int value = (keypoint->columns[j] + r) * 255.f / (2.f * r);
if (value < 0) { printf("WARN: %d:%d %f -> %d\n", i, j, keypoint->columns[j], value); value = 0; }
if (value > 255) { printf("WARN: %d:%d %f -> %d\n", i, j, keypoint->columns[j], value); value = 255; }
fprintf(f, "%d%s", value, (i != (data.rows -1)) ? ", " : "");
}
fprintf(f, "%s", (j != (data.columns - 1)) ? ",\n\t" : "\n};\n");
}
return 1;
}
int main(int argc, char *argv[]) {
FILE *fin, *fout;
if (argc < 3) {
usage(argv[0]);
return 1;
}
fin = fopen(argv[1], "r");
if (!fin) {
printf("cannot open file %s\n", argv[1]);
return 1;
}
if (!timelineRead(fin)) {
printf("Unable to parse file %s\n", argv[1]);
return 1;
}
fclose(fin);
fout = fopen(argv[2], "w");
if (!fin) {
printf("cannot open file %s\n", argv[2]);
return 1;
}
if (!timelineWrite(fout)) {
printf("Unable to write file %s\n", argv[2]);
return 1;
}
fclose(fout);
return 0;
}