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tav: encoder ENDT fix

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This commit is contained in:
minjaesong
2025-11-29 01:58:54 +09:00
parent 3b401139e9
commit 9edeca929d
6 changed files with 52 additions and 39 deletions
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45
video_encoder/encoder_tav_text.c
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@@ -24,8 +24,8 @@ Audio: MP2 encoding at 96 kbps, 32 KHz stereo (packet 0x20)
Each text frame is treated as an I-frame with sync packet
Usage:
gcc -O3 -std=c11 -Wall encoder_tav_text.c -o encoder_tav_text -lm -lzstd
./encoder_tav_text -i video.mp4 -f font.chr -o output.vtx
gcc -Ofast -std=c11 -Wall encoder_tav_text.c -o encoder_tav_text -lm -lzstd
./encoder_tav_text -i video.mp4 -f font.chr -o output.mv3
*/
#define _POSIX_C_SOURCE 200809L
@@ -93,6 +93,9 @@ static void generate_random_filename(char *filename) {
char TEMP_AUDIO_FILE[42];
// Global flag to disable inverted character matching
int g_no_invert_char = 0;
typedef struct {
uint8_t *data; // Binary glyph data (PATCH_SZ bytes per glyph)
int count; // Number of glyphs
@@ -193,7 +196,7 @@ FontROM *load_font_rom(const char *path) {
// Find best matching glyph for a grayscale patch
int find_best_glyph(const uint8_t *patch, const FontROM *rom, uint8_t *out_bg, uint8_t *out_fg) {
// Try both normal and inverted matching
// Try both normal and inverted matching (unless --no-invert-char is set)
int best_glyph = 0;
float best_error = INFINITY;
uint8_t best_bg = COLOR_BLACK, best_fg = COLOR_WHITE;
@@ -209,25 +212,28 @@ int find_best_glyph(const uint8_t *patch, const FontROM *rom, uint8_t *out_bg, u
err_normal += diff * diff;
}
// Try inverted: glyph 0 = fg, glyph 1 = bg
float err_inverted = 0;
for (int i = 0; i < PATCH_SZ; i++) {
int expected = glyph[i] ? 0 : 255;
int diff = patch[i] - expected;
err_inverted += diff * diff;
}
if (err_normal < best_error) {
best_error = err_normal;
best_glyph = g;
best_bg = COLOR_BLACK;
best_fg = COLOR_WHITE;
}
if (err_inverted < best_error) {
best_error = err_inverted;
best_glyph = g;
best_bg = COLOR_WHITE;
best_fg = COLOR_BLACK;
// Try inverted: glyph 0 = fg, glyph 1 = bg (skip if --no-invert-char)
if (!g_no_invert_char) {
float err_inverted = 0;
for (int i = 0; i < PATCH_SZ; i++) {
int expected = glyph[i] ? 0 : 255;
int diff = patch[i] - expected;
err_inverted += diff * diff;
}
if (err_inverted < best_error) {
best_error = err_inverted;
best_glyph = g;
best_bg = COLOR_WHITE;
best_fg = COLOR_BLACK;
}
}
}
@@ -479,7 +485,7 @@ void write_text_packet(FILE *f, const uint8_t *bg_col, const uint8_t *fg_col,
int main(int argc, char **argv) {
if (argc < 7) {
fprintf(stderr, "Usage: %s -i <video> -f <font.chr> -o <output.tav>\n", argv[0]);
fprintf(stderr, "Usage: %s -i <video> -f <font.chr> -o <output.tav> [--no-invert-char]\n", argv[0]);
return 1;
}
@@ -491,6 +497,7 @@ int main(int argc, char **argv) {
if (strcmp(argv[i], "-i") == 0 && i+1 < argc) input_video = argv[++i];
else if (strcmp(argv[i], "-f") == 0 && i+1 < argc) font_path = argv[++i];
else if (strcmp(argv[i], "-o") == 0 && i+1 < argc) output_path = argv[++i];
else if (strcmp(argv[i], "--no-invert-char") == 0) g_no_invert_char = 1;
}
if (!input_video || !font_path || !output_path) {
@@ -498,6 +505,10 @@ int main(int argc, char **argv) {
return 1;
}
if (g_no_invert_char) {
fprintf(stderr, "Inverted character matching disabled\n");
}
// Generate random temp filename for audio
generate_random_filename(TEMP_AUDIO_FILE);