void _mp4v2_read_chapters(MP4V2Handles *handle) {
VALUE self = handle->self;
MP4Chapter_t *chaps = NULL;
uint32_t count;
MP4GetChapters(handle->file, &chaps, &count, MP4ChapterTypeAny);
VALUE chapters = rb_ary_new2(count), chapter;
MP4Duration sum = 0;
for (uint32_t i = 0; i < count; i++) {
chapter = rb_funcall(rb_cChapter, rb_intern("new"), 2, DBL2NUM(sum), rb_utf8_str(chaps[i].title));
rb_ary_push(chapters, chapter);
sum += chaps[i].duration;
}
free(chaps);
handle->chapters = NULL;
SET(chapters, chapters);
}
/** Action for exporting chapters from the <b>job.file</b>
*
*
* @param job the job to process
* @return mp4v2::util::SUCCESS if successful, mp4v2::util::FAILURE otherwise
*/
bool
ChapterUtility::actionExport( JobContext& job )
{
job.fileHandle = MP4Read( job.file.c_str() );
if( job.fileHandle == MP4_INVALID_FILE_HANDLE )
{
return herrf( "unable to open for read: %s\n", job.file.c_str() );
}
// get the list of chapters
MP4Chapter_t* chapters = 0;
uint32_t chapterCount = 0;
MP4ChapterType chtp = MP4GetChapters( job.fileHandle, &chapters, &chapterCount, _ChapterType );
if (0 == chapterCount)
{
return herrf( "File \"%s\" does not contain chapters of type %s\n", job.file.c_str(),
getChapterTypeName( chtp ).c_str() );
}
// build the filename
string outName = job.file;
if( _ChapterFile.empty() )
{
FileSystem::pathnameStripExtension( outName );
outName.append( ".chapters.txt" );
}
else
{
outName = _ChapterFile;
}
ostringstream oss;
oss << "Exporting " << chapterCount << " " << getChapterTypeName( chtp );
oss << " chapters from file " << '"' << job.file << '"' << " into chapter file " << '"' << outName << '"' << endl;
verbose1f( "%s", oss.str().c_str() );
if( dryrunAbort() )
{
// free up the memory
MP4Free(chapters);
return SUCCESS;
}
// open the file
File out( outName, File::MODE_CREATE );
if( openFileForWriting( out ) )
{
// free up the memory
MP4Free(chapters);
return FAILURE;
}
// write the chapters
#if defined( _WIN32 )
static const char* LINEND = "\r\n";
#else
static const char* LINEND = "\n";
#endif
File::Size nout;
bool failure = SUCCESS;
int width = 2;
if( CHPT_FMT_COMMON == _ChapterFormat && (chapterCount / 100) >= 1 )
{
width = 3;
}
Timecode duration( 0, CHAPTERTIMESCALE );
duration.setFormat( Timecode::DECIMAL );
for( uint32_t i = 0; i < chapterCount; ++i )
{
// print the infos
ostringstream oss;
switch( _ChapterFormat )
{
case CHPT_FMT_COMMON:
oss << "CHAPTER" << setw( width ) << setfill( '0' ) << i+1 << '=' << duration.svalue << LINEND
<< "CHAPTER" << setw( width ) << setfill( '0' ) << i+1 << "NAME=" << chapters[i].title << LINEND;
break;
case CHPT_FMT_NATIVE:
default:
oss << duration.svalue << ' ' << chapters[i].title << LINEND;
}
string str = oss.str();
if( out.write( str.c_str(), str.size(), nout ) )
{
failure = herrf( "write to %s failed: %s\n", outName.c_str(), sys::getLastErrorStr() );
break;
}
// add the duration of this chapter to the sum (the start time of the next chapter)
duration += Timecode(chapters[i].duration, CHAPTERTIMESCALE);
}
out.close();
if( failure )
{
verbose1f( "removing file %s\n", outName.c_str() );
::remove( outName.c_str() );
}
// free up the memory
MP4Free(chapters);
return SUCCESS;
}
