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Use agi::scoped_holder to close files in mkvwrap

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This commit is contained in:
Thomas Goyne 2013-09-29 08:00:36 -07:00
parent bbd4cbef78
commit 9a21c13cbe
1 changed files with 73 additions and 83 deletions
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36
aegisub/src/mkv_wrap.cpp
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@ -44,6 +44,7 @@
#include "MatroskaParser.h"
#include <libaegisub/fs.h>
#include <libaegisub/scoped_ptr.h>
#include <algorithm>
#include <boost/algorithm/string/classification.hpp>
@ -135,19 +136,17 @@ static void read_subtitles(agi::ProgressSink *ps, MatroskaFile *file, MkvStdIO *
void MatroskaWrapper::GetSubtitles(agi::fs::path const& filename, AssFile *target) {
MkvStdIO input(filename);
char err[2048];
MatroskaFile *file = mkv_Open(&input, err, sizeof(err));
agi::scoped_holder<MatroskaFile*, decltype(&mkv_Close)> file(mkv_Open(&input, err, sizeof(err)), mkv_Close);
if (!file) throw MatroskaException(err);
try {
// Get info
unsigned tracks = mkv_GetNumTracks(file);
std::vector<unsigned> tracksFound;
std::vector<std::string> tracksNames;
unsigned trackToRead;
// Find tracks
for (unsigned track = 0; track < tracks; track++) {
TrackInfo *trackInfo = mkv_GetTrackInfo(file, track);
for (auto track : boost::irange(0u, tracks)) {
auto trackInfo = mkv_GetTrackInfo(file, track);
if (trackInfo->Type != 0x11) continue;
// Known subtitle format
@ -166,6 +165,7 @@ void MatroskaWrapper::GetSubtitles(agi::fs::path const& filename, AssFile *targe
if (tracksFound.empty())
throw MatroskaException("File has no recognised subtitle tracks.");
unsigned trackToRead;
// Only one track found
if (tracksFound.size() == 1)
trackToRead = tracksFound[0];
@ -180,7 +180,7 @@ void MatroskaWrapper::GetSubtitles(agi::fs::path const& filename, AssFile *targe
// Picked track
mkv_SetTrackMask(file, ~(1 << trackToRead));
TrackInfo *trackInfo = mkv_GetTrackInfo(file, trackToRead);
auto trackInfo = mkv_GetTrackInfo(file, trackToRead);
std::string CodecID(trackInfo->CodecID);
bool srt = CodecID == "S_TEXT/UTF8";
bool ssa = CodecID == "S_TEXT/SSA";
@ -204,25 +204,20 @@ void MatroskaWrapper::GetSubtitles(agi::fs::path const& filename, AssFile *targe
}
// Read timecode scale
SegmentInfo *segInfo = mkv_GetFileInfo(file);
auto segInfo = mkv_GetFileInfo(file);
longlong timecodeScale = mkv_TruncFloat(trackInfo->TimecodeScale) * segInfo->TimecodeScale;
// Progress bar
double totalTime = double(segInfo->Duration) / timecodeScale;
auto totalTime = double(segInfo->Duration) / timecodeScale;
DialogProgress progress(nullptr, _("Parsing Matroska"), _("Reading subtitles from Matroska file."));
progress.Run([&](agi::ProgressSink *ps) { read_subtitles(ps, file, &input, srt, totalTime, &parser); });
}
catch (...) {
mkv_Close(file);
throw;
}
}
bool MatroskaWrapper::HasSubtitles(agi::fs::path const& filename) {
char err[2048];
try {
MkvStdIO input(filename);
auto file = mkv_Open(&input, err, sizeof(err));
agi::scoped_holder<MatroskaFile*, decltype(&mkv_Close)> file(mkv_Open(&input, err, sizeof(err)), mkv_Close);
if (!file) return false;
// Find tracks
@ -232,20 +227,16 @@ bool MatroskaWrapper::HasSubtitles(agi::fs::path const& filename) {
if (trackInfo->Type == 0x11) {
std::string CodecID(trackInfo->CodecID);
if (CodecID == "S_TEXT/SSA" || CodecID == "S_TEXT/ASS" || CodecID == "S_TEXT/UTF8") {
mkv_Close(file);
if (CodecID == "S_TEXT/SSA" || CodecID == "S_TEXT/ASS" || CodecID == "S_TEXT/UTF8")
return true;
}
}
}
mkv_Close(file);
return false;
}
catch (...) {
// We don't care about why we couldn't read subtitles here
return false;
}
return false;
}
int StdIoRead(InputStream *_st, ulonglong pos, void *buffer, int count) {
@ -274,9 +265,8 @@ longlong StdIoScan(InputStream *st, ulonglong start, unsigned signature) {
return -1;
int c;
unsigned cmp = 0;
while ((c = getc(fp)) != EOF) {
cmp = ((cmp << 8) | c) & 0xffffffff;
unsigned cmp = ((cmp << 8) | c) & 0xffffffff;
if (cmp == signature)
return std_ftell(fp) - 4;
}