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only assure sample loopend is within sdtachunk

This commit is contained in:
Tom M 2017-08-04 18:33:48 +02:00 committed by GitHub
parent c149678912
commit cc84b40736
1 changed files with 6 additions and 2 deletions
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8
fluidsynth/src/sfloader/fluid_defsfont.c
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@ -3170,8 +3170,12 @@ fixup_sample (SFData * sf)
/* The SoundFont 2.4 spec defines the loop start index as the first sample point of the loop */
inv_start = (sam->loopstart < sam->start) || (sam->loopstart >= sam->loopend);
/* while loop end is the first point AFTER the last sample of the loop */
inv_end = (sam->loopend > sam->end) || (sam->loopstart >= sam->loopend);
/* while loop end is the first point AFTER the last sample of the loop.
* this is as it should be. however we cannot be sure whether any of sam.loopend or sam.end
* is correct. hours of thinking through this have concluded, that it would be best practice
* to mangle with loops as little as necessary by only making sure loopend is within
* sdtachunk_size. incorrect soundfont shall preferably fail loudly. */
inv_end = (sam->loopend > sdtachunk_size) || (sam->loopstart >= sam->loopend);
/* if sample is not a ROM sample and end is over the sample data chunk
or sam start is greater than 4 less than the end (at least 4 samples) */