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TAV: videotex mode; TSVM documentation fix

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This commit is contained in:
minjaesong
2025-11-21 16:53:35 +09:00
parent a61a21d28b
commit 2533b2dc19
7 changed files with 794 additions and 22 deletions
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51
video_encoder/tav_inspector.c
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@@ -26,8 +26,9 @@
#define TAV_PACKET_AUDIO_MP2 0x20
#define TAV_PACKET_AUDIO_PCM8 0x21
#define TAV_PACKET_AUDIO_TAD 0x24
#define TAV_PACKET_SUBTITLE 0x30 // Legacy SSF (frame-locked)
#define TAV_PACKET_SUBTITLE 0x30 // Legacy SSF (frame-locked), also used for Font ROM upload
#define TAV_PACKET_SUBTITLE_TC 0x31 // SSF-TC (timecode-based)
#define TAV_PACKET_VIDEOTEX 0x3F // Videotex (text-mode video)
#define TAV_PACKET_AUDIO_TRACK 0x40
#define TAV_PACKET_VIDEO_CH2_I 0x70
#define TAV_PACKET_VIDEO_CH2_P 0x71
@@ -77,6 +78,7 @@ typedef struct {
int audio_tad_count;
int audio_track_count;
int subtitle_count;
int videotex_count;
int timecode_count;
int sync_count;
int sync_ntsc_count;
@@ -91,6 +93,7 @@ typedef struct {
uint64_t audio_pcm8_bytes;
uint64_t audio_tad_bytes;
uint64_t audio_track_bytes;
uint64_t videotex_bytes;
} packet_stats_t;
// Display options
@@ -122,6 +125,7 @@ const char* get_packet_type_name(uint8_t type) {
case TAV_PACKET_AUDIO_TAD: return "AUDIO TAD (zstd)";
case TAV_PACKET_SUBTITLE: return "SUBTITLE (SSF frame-locked)";
case TAV_PACKET_SUBTITLE_TC: return "SUBTITLE (SSF-TC timecoded)";
case TAV_PACKET_VIDEOTEX: return "VIDEOTEX (text-mode video)";
case TAV_PACKET_AUDIO_TRACK: return "AUDIO TRACK (Separate MP2)";
case TAV_PACKET_EXIF: return "METADATA (EXIF)";
case TAV_PACKET_ID3V1: return "METADATA (ID3v1)";
@@ -820,6 +824,45 @@ static const char* VERDESC[] = {"null", "YCoCg tiled, uniform", "ICtCp tiled, un
break;
}
case TAV_PACKET_VIDEOTEX: {
stats.videotex_count++;
uint32_t size;
if (fread(&size, sizeof(uint32_t), 1, fp) != 1) break;
stats.videotex_bytes += size;
if (!opts.summary_only && display) {
// Read compressed data
uint8_t *compressed_data = malloc(size);
if (compressed_data && fread(compressed_data, 1, size, fp) == size) {
// Allocate decompression buffer (max 2 + 80*32*3 = 7682 bytes)
size_t const decompress_size = 8192;
uint8_t *decompressed_data = malloc(decompress_size);
if (decompressed_data) {
size_t actual_size = ZSTD_decompress(decompressed_data, decompress_size,
compressed_data, size);
if (!ZSTD_isError(actual_size) && actual_size >= 2) {
uint8_t rows = decompressed_data[0];
uint8_t cols = decompressed_data[1];
printf(" - size=%u bytes (decompressed: %zu bytes, grid: %ux%u, ratio: %.2f:1)",
size, actual_size, cols, rows, (double)actual_size / size);
} else {
printf(" - size=%u bytes (decompression failed)", size);
}
free(decompressed_data);
} else {
printf(" - size=%u bytes", size);
}
free(compressed_data);
} else {
printf(" - size=%u bytes", size);
fseek(fp, size, SEEK_CUR);
}
} else {
fseek(fp, size, SEEK_CUR);
}
break;
}
case TAV_PACKET_EXIF:
case TAV_PACKET_ID3V1:
case TAV_PACKET_ID3V2:
@@ -950,6 +993,12 @@ static const char* VERDESC[] = {"null", "YCoCg tiled, uniform", "ICtCp tiled, un
printf("\nOther:\n");
printf(" Timecodes: %d\n", stats.timecode_count);
printf(" Subtitles: %d\n", stats.subtitle_count);
if (stats.videotex_count > 0) {
printf(" Videotex frames: %d (%llu bytes, %.2f MB)\n",
stats.videotex_count,
(unsigned long long)stats.videotex_bytes,
stats.videotex_bytes / 1024.0 / 1024.0);
}
printf(" Extended headers: %d\n", stats.extended_header_count);
printf(" Metadata packets: %d\n", stats.metadata_count);
printf(" Loop points: %d\n", stats.loop_point_count);