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Sort VobSub entries according to their timestamp if there are tracks with timestamps that go backwards. Also warn about such entries.

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This commit is contained in:
Moritz Bunkus 2004-07-20 17:22:18 +00:00
parent 468cf4f859
commit ede68e964c
3 changed files with 93 additions and 47 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2004-07-20 Moritz Bunkus <moritz@bunkus.org>
* mkvmerge: bug fix: Broken VobSub .idx files which contain
timestamps going backwards no longer crash mkvmerge. A warning
will be printed for such inconsistencies.
2004-07-19 Moritz Bunkus <moritz@bunkus.org>
* mkvmerge: bug fix: The Matroska reader contained a nice little

123
src/input/r_vobsub.cpp
View File

@ -70,6 +70,11 @@ using namespace std;
#define PFX "vobsub_reader: "
bool
vobsub_entry_c::operator < (const vobsub_entry_c &cmp) const {
return timestamp < cmp.timestamp;
}
int
vobsub_reader_c::probe_file(mm_io_c *mm_io,
int64_t size) {
@ -160,39 +165,41 @@ vobsub_reader_c::~vobsub_reader_c() {
void
vobsub_reader_c::create_packetizer(int64_t tid) {
uint32_t i, k;
int64_t avg_duration;
uint32_t k;
int64_t avg_duration, duration;
char language[4];
const char *c;
vobsub_track_c *track;
if ((tid < tracks.size()) && demuxing_requested('s', tid) &&
(tracks[tid]->ptzr == -1)) {
i = tid;
ti->id = i;
if ((c = map_iso639_1_to_iso639_2(tracks[i]->language)) != NULL) {
track = tracks[tid];
ti->id = tid;
if ((c = map_iso639_1_to_iso639_2(tracks[tid]->language)) != NULL) {
strcpy(language, c);
ti->language = language;
} else
ti->language = NULL;
tracks[i]->ptzr =
track->ptzr =
add_packetizer(new vobsub_packetizer_c(this, idx_data.c_str(),
idx_data.length(), ti));
if (tracks[i]->timecodes.size() > 0) {
if (track->entries.size() > 0) {
avg_duration = 0;
for (k = 0; k < (tracks[i]->timecodes.size() - 1); k++) {
tracks[i]->durations.push_back(tracks[i]->timecodes[k + 1] -
tracks[i]->timecodes[k]);
avg_duration += tracks[i]->timecodes[k + 1] - tracks[i]->timecodes[k];
for (k = 0; k < (track->entries.size() - 1); k++) {
duration = track->entries[k + 1].timestamp -
track->entries[k].timestamp;
track->entries[k].duration = duration;
avg_duration += duration;
}
} else
avg_duration = 1000000000;
if (tracks[i]->timecodes.size() > 1)
avg_duration /= (tracks[i]->timecodes.size() - 1);
tracks[i]->durations.push_back(avg_duration);
if (track->entries.size() > 1)
avg_duration /= (track->entries.size() - 1);
track->entries[track->entries.size() - 1].duration = avg_duration;
mxinfo(FMT_TID "Using the VobSub subtitle output module (language: %s).\n",
ti->fname, (int64_t)i, tracks[i]->language);
ti->fname, (int64_t)tid, track->language);
ti->language = NULL;
}
}
@ -211,16 +218,22 @@ vobsub_reader_c::parse_headers() {
const char *sline;
char language[3];
vobsub_track_c *track;
int64_t filepos, timestamp;
int64_t filepos, timestamp, line_no, last_timestamp;
int hour, minute, second, msecond, idx;
uint32_t i, k, tsize;
vobsub_entry_c entry;
bool sort_required;
language[0] = 0;
track = NULL;
line_no = 0;
last_timestamp = 0;
sort_required = false;
while (1) {
if (!idx_file->getline2(line))
break;
line_no++;
if ((line.length() == 0) || (line[0] == '#'))
continue;
@ -235,12 +248,19 @@ vobsub_reader_c::parse_headers() {
} else
language[0] = 0;
if (track != NULL) {
if (track->timecodes.size() == 0)
if (track->entries.size() == 0)
delete track;
else
else {
tracks.push_back(track);
if (sort_required) {
mxverb(2, PFX "Sorting track %u\n", tracks.size());
stable_sort(track->entries.begin(), track->entries.end());
}
}
}
track = new vobsub_track_c(language);
last_timestamp = 0;
sort_required = false;
continue;
}
@ -260,14 +280,28 @@ vobsub_reader_c::parse_headers() {
filepos = filepos * 16 + hexvalue(sline[idx]);
idx++;
}
track->positions.push_back(filepos);
entry.position = filepos;
sscanf(&sline[11], "%02d:%02d:%02d:%03d", &hour, &minute, &second,
&msecond);
timestamp = (int64_t)hour * 60 * 60 * 1000 +
(int64_t)minute * 60 * 1000 + (int64_t)second * 1000 +
(int64_t)msecond;
track->timecodes.push_back(timestamp * 1000000);
entry.timestamp = timestamp * 1000000;
track->entries.push_back(entry);
if ((timestamp < last_timestamp) &&
demuxing_requested('s', tracks.size())) {
mxwarn(PFX "'%s', line %lld: The current timestamp (" FMT_TIMECODE
") is smaller than the last one (" FMT_TIMECODE"). mkvmerge "
"will sort the entries according to their timestamps. This "
"might result in the wrong order for some subtitle entries. If "
"this is the case then you have to fix the .idx file "
"manually.\n", ti->fname, line_no,
ARG_TIMECODE(timestamp), ARG_TIMECODE(last_timestamp));
sort_required = true;
}
last_timestamp = timestamp;
continue;
}
@ -276,32 +310,29 @@ vobsub_reader_c::parse_headers() {
idx_data += "\n";
}
if (track != NULL) {
if (track->timecodes.size() == 0)
if (track->entries.size() == 0)
delete track;
else
else {
tracks.push_back(track);
if (sort_required) {
mxverb(2, PFX "Sorting track %u\n", tracks.size());
stable_sort(track->entries.begin(), track->entries.end());
}
}
}
if (!identifying) {
if (!identifying && (verbose > 1)) {
tsize = tracks.size();
for (i = 0; i < tsize; i++)
if (tracks[i]->positions.size() != tracks[i]->timecodes.size())
mxerror(PFX "Have %u positions and %u timecodes. This "
"should not have happened. Please file a bug report.\n",
tracks[i]->positions.size(), tracks[i]->timecodes.size());
if (verbose > 1) {
for (i = 0; i < tsize; i++) {
mxinfo("vobsub_reader: Track number %u\n", i);
for (k = 0; k < tracks[i]->positions.size(); k++)
mxinfo("vobsub_reader: %04u position: %12lld (0x%04x%08x), "
"timecode: %12lld (" FMT_TIMECODE ")\n", k,
tracks[i]->positions[k],
(uint32_t)(tracks[i]->positions[k] >> 32),
(uint32_t)(tracks[i]->positions[k] & 0xffffffff),
tracks[i]->timecodes[k] / 1000000,
ARG_TIMECODE_NS(tracks[i]->timecodes[k]));
}
for (i = 0; i < tsize; i++) {
mxinfo("vobsub_reader: Track number %u\n", i);
for (k = 0; k < tracks[i]->entries.size(); k++)
mxinfo("vobsub_reader: %04u position: %12lld (0x%04x%08x), "
"timecode: %12lld (" FMT_TIMECODE ")\n", k,
tracks[i]->entries[k].position,
(uint32_t)(tracks[i]->entries[k].position >> 32),
(uint32_t)(tracks[i]->entries[k].position & 0xffffffff),
tracks[i]->entries[k].timestamp / 1000000,
ARG_TIMECODE_NS(tracks[i]->entries[k].timestamp));
}
}
}
@ -542,16 +573,16 @@ vobsub_reader_c::read(generic_packetizer_c *ptzr,
break;
}
if ((track == NULL) || (track->idx >= track->positions.size()))
if ((track == NULL) || (track->idx >= track->entries.size()))
return 0;
id = i;
sub_file->setFilePointer(track->positions[track->idx]);
extract_one_spu_packet(track->timecodes[track->idx],
track->durations[track->idx], id);
sub_file->setFilePointer(track->entries[track->idx].position);
extract_one_spu_packet(track->entries[track->idx].timestamp,
track->entries[track->idx].duration, id);
track->idx++;
if (track->idx >= track->timecodes.size()) {
if (track->idx >= track->entries.size()) {
flush_packetizers();
return 0;
} else

11
src/input/r_vobsub.h
View File

@ -30,11 +30,20 @@
#include "pr_generic.h"
#include "p_vobsub.h"
class vobsub_entry_c {
public:
int64_t position;
int64_t timestamp;
int64_t duration;
bool operator < (const vobsub_entry_c &cmp) const;
};
class vobsub_track_c {
public:
char *language;
int ptzr;
vector<int64_t> positions, timecodes, durations;
vector<vobsub_entry_c> entries;
int idx, aid;
bool mpeg_version_warning_printed;
int64_t packet_num, spu_size, overhead;