Thanks Doug, I made a sample project and submitted radar://28351122
It's encouraging that region lists are working on someone's machine. I wouldn't be surprised if it's just something I misunderstood about working with variable length structs. I don't use C all that often. On Fri, Sep 16, 2016 at 12:48 PM, Doug Wyatt <dwy...@apple.com> wrote: > Hi Charles, > > If you could please write a bug report and attach a crash log, we'll look > into it. I have successfully written a small number of markers to a CAF > file... > > Thanks, > Doug > > > > On Sep 16, 2016, at 1:17 , Charles Constant <char...@charlesism.com> > wrote: > > > > Judging by the lack of mentions anywhere on the internet, I don't think > many people use AudioFileRegionLists. I have found one mention from 3 years > ago, where the developer had similar results reading, as to what I am > seeing with writing - in so far as only the first marker of the first > region is reliably accessible. > > > > https://devforums.apple.com/message/759692#759692 > > > > So I'm leaning toward a new theory, that it's not my CSStrings, but that > this feature is broken. Can anyone confirm this? > > > > Thanks > > > > Charles > > > > PS: I also see a layer down, this might be possible using a > CAFRegionChunk. Anyone had any luck with this? > > > > > > > > On Wed, Sep 14, 2016 at 8:53 PM, Charles Constant < > char...@charlesism.com> wrote: > > > > I'm having a rather bad time getting AudioFileSetProperty to write an > AudioFileRegionList to a CAF file. I suspect the problem is the way that > I'm allocating CFStrings. > > > > Is this an appropriate way to allocate CFStrings when setting a > marker.mName or region.mName? > > > > rgn->mName = CFStringCreateWithFormat( kCFAllocatorDefault, NULL, > CFSTR("Region-%d"), r ); > > > > > > > > My problem is that if I try to create a List that contains more than one > Region, as soon as I call AudioFileSetProperty, I get "EXC_BAD_ACCESS." > This happens unless I use a very small quantity of regions and markers. The > debugger shows the exact place where AudioFileSetProperty falls over as > either "CFStringGetLength" or "CAFRegion_NtoB(CAFRegion*)". > > > > > > > > If I create only a single Region, and then use afinfo to view my file, I > get this type of thing: > > > > MacBook-Pro:~ username$ afinfo /Users/username/UnitTest_CAF_ANSI_C.caf > > File: /Users/username/UnitTest_CAF_ANSI_C.caf > > File type ID: caff > > Num Tracks: 1 > > ---- > > Data format: 1 ch, 44100 Hz, 'lpcm' (0x0000000E) 16-bit big-endian > signed integer > > no channel layout. > > estimated duration: 5.001315 sec > > audio bytes: 441116 > > audio packets: 220558 > > bit rate: 705600 bits per second > > packet size upper bound: 2 > > maximum packet size: 2 > > audio data file offset: 4096 > > optimized > > audio 220558 valid frames + 0 priming + 0 remainder = 220558 > > source bit depth: I16 > > 1 regions; SMPTE time type 0 (none) > > region 1, "Region-0", flags 00000000 > > marker 990, "Marker-990": frame 100 SMPTE time > 0:00:00:00/0 type 1935828327 ('sbeg') channel 0 > > marker 991, "<unnnamed>": frame 200 SMPTE time > 0:00:00:00/0 type 1936027236 ('send') channel 0 > > marker 992, "<unnnamed>": frame 300 SMPTE time > 0:00:00:00/0 type 1935828327 ('sbeg') channel 0 > > > > The names should be "Marker-990" "Marker-991" "Marker-992" and so on. > > > > > > Anyone have any ideas? I'm stumped, and after three days working on > this, I can't find much outside information. > > > > Thanks, > > > > Charles > > > > > > > > > > > > > > > > _______________________________________________ > > Do not post admin requests to the list. They will be ignored. > > Coreaudio-api mailing list (Coreaudio-api@lists.apple.com) > > Help/Unsubscribe/Update your Subscription: > > https://lists.apple.com/mailman/options/coreaudio-api/dwyatt%40apple.com > > > > This email sent to dwy...@apple.com > >
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