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Merge branch 'pr/n51_wforums'

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This commit is contained in:
Carlos Fernandez 2014-06-22 18:08:23 -07:00
commit a5827dd0b9
2 changed files with 27 additions and 2 deletions
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2
docs/CHANGES.TXT
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@ -7,6 +7,8 @@ version of CCExtractor.
- Added a huge dictionary submitted by Matt Stockard.
- Added DVB subtitles decoder, spupng in output
- Added support for cdt2 media atoms in QT video files. Now multiple atoms in
a single sample sequence are supported.
0.69
----

25
src/gpacmp4/mp4.c
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@ -292,12 +292,35 @@ int processmp4 (char *file)
pts_set=1;
set_fts();
// Change by Willem
// Apparently the first 4 bytes are the sample length, and then comes 'cdat', and then the data itself
if (sample->dataLength>8 && strncmp (sample->data+4, "cdat", 4)==0)
/*if (sample->dataLength>8 && strncmp (sample->data+4, "cdat", 4)==0)
{
//dump (256,( unsigned char *) sample->data+8,sample->dataLength-8,0, 1);
process608((const unsigned char *)sample->data + 8, sample->dataLength - 8, &context_cc608_field_1);
}*/
// Based on https://developer.apple.com/library/prerelease/mac/documentation/QuickTime/QTFF/QTFFChap3/qtff3.html#//apple_ref/doc/uid/TP40000939-CH205-SW87
// An atom consists of the Atom size, Atom Type and the data.
// First 4 bytes are length in bytes of this atom
// byte 5-8 are the atom type. Should be either cdat or cdt2
// byte 9-x are actual data.
// This means a sample can contain multiple atoms!
if (sample->dataLength > 8 && strncmp(sample->data + 4, "cdat", 4) == 0){ // The format of the closed captioning sample data is a sequence of one or more atoms, one of which must be a 'cdat' atom.
int atomStart = 0;
// process Atom by Atom
while (atomStart < sample->dataLength){
unsigned int atomLength = (unsigned char)sample->data[atomStart] << 24 | (unsigned char)sample->data[atomStart + 1] << 16 | (unsigned char)sample->data[atomStart + 2] << 8 | (unsigned char)sample->data[atomStart + 3];
if (atomLength > 8 && (strncmp(sample->data + atomStart + 4, "cdat", 4) == 0 || strncmp(sample->data + atomStart + 4, "cdt2", 4) == 0)){
dump(256, (unsigned char *)sample->data +atomStart+ 8, atomLength - 8, 0, 1);
process608((const unsigned char *)sample->data + atomStart + 8, atomLength - 8, &context_cc608_field_1);
}
atomStart += atomLength;
}
}
// End of change
int progress = (int) ((k*100) / num_samples);
if (last_reported_progress != progress)
{