void _mp4v2_write_chapters(MP4V2Handles *handle) {
VALUE self = handle->self;
MP4FileHandle mp4v2 = handle->file;
VALUE chapters = rb_check_array_type(GET(chapters)), chapter, title;
double last_stamp = 0, stamp;
MP4Chapter_t *chaps;
uint32_t count = 0;
switch(TYPE(chapters)) {
case T_ARRAY:
RARRAY_ALL_INSTANCE(chapters, rb_cChapter, chapter);
// Make chapters go in order of timestamp
rb_ary_sort_bang(chapters);
count = RARRAY_LEN(chapters);
chaps = handle->chapters = (MP4Chapter_t *)malloc(sizeof(MP4Chapter_t) * count);
if (!chaps) {
rb_raise(rb_eNoMemError, "unable to save all changes to file");
}
for (uint32_t i = 0; i < count; i++) {
// Calculate the duration of chapter from previous timestamp and current
chapter = rb_ary_entry(chapters, i);
stamp = NUM2DBL(rb_funcall(rb_ivar_get(chapter, rb_intern("@timestamp")), rb_intern("milliseconds"), 0));
chaps[i].duration = stamp - last_stamp;
last_stamp = stamp;
// Get the title of the chapter
title = rb_encode_utf8(rb_ivar_get(chapter, rb_intern("@title")));
if (RSTRING_LEN(title) > MP4V2_CHAPTER_TITLE_MAX) {
rb_raise(rb_eStandardError, "chapter title '%s' is too long, it should be at most %d bytes", RSTRING_PTR(title), MP4V2_CHAPTER_TITLE_MAX);
}
memcpy(chaps[i].title, RSTRING_PTR(title), RSTRING_LEN(title)+1);
}
if (count > 0) {
MP4SetChapters(mp4v2, chaps, count, MP4ChapterTypeAny);
} else {
MP4DeleteChapters(mp4v2, MP4ChapterTypeAny);
}
free(chaps);
handle->chapters = NULL;
break;
case T_NIL:
MP4DeleteChapters(mp4v2, MP4ChapterTypeAny);
break;
default:;
}
}
/** Action for removing 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::actionRemove( JobContext& job )
{
ostringstream oss;
oss << "Deleting " << getChapterTypeName( _ChapterType ) << " chapters from file " << '"' << job.file << '"' << endl;
verbose1f( "%s", oss.str().c_str() );
if( dryrunAbort() )
{
return SUCCESS;
}
job.fileHandle = MP4Modify( job.file.c_str() );
if( job.fileHandle == MP4_INVALID_FILE_HANDLE )
{
return herrf( "unable to open for write: %s\n", job.file.c_str() );
}
MP4ChapterType chtp = MP4DeleteChapters( job.fileHandle, _ChapterType );
if( MP4ChapterTypeNone == chtp )
{
return FAILURE;
}
fixQtScale( job.fileHandle );
job.optimizeApplicable = true;
return SUCCESS;
}
