[FFmpeg-devel] [PATCHv2 1/2] avdevice/decklink_dec: add support for decoding teletext from 10bit ancillary data

[John Warburton]

On Tue, Jul 18, 2017 at 6:10 PM, Marton Balint <cus at passwd.hu> wrote:
> On Sat, 8 Jul 2017, Marton Balint wrote:
>
>> This also add supports for 4K DeckLink cards because they always output the
>> ancillary data in 10-bit.
>>
>> v2:
>> - only try teletext decoding for 576i PAL mode
>> - some comments as requested by Aaron Levinson
>>
>> Signed-off-by: Marton Balint <cus at passwd.hu>
>
> Applied the series, thanks for all the comments.

Since this patch was applied, the mingw-w64 compiler, gcc version
6.4.1, fails to link shared library avdevice-57.dll, giving the
following error. It is as if the const uint8_t ff_reverse[256] that is
found in libavutil/reverse.c somehow isn't being discovered by the
linker. I'm afraid my knowledge beyond this point is zero.

libavdevice/decklink_dec.o:decklink_dec.cpp:(.rdata$.refptr.ff_reverse[.refptr.ff_reverse]+0x0):
undefined reference to `ff_reverse'
collect2: error: ld returned 1 exit status
ffbuild/library.mak:101: recipe for target 'libavdevice/avdevice-57.dll' failed
make: *** [libavdevice/avdevice-57.dll] Error 1
Build failure. Please see error messages above.

Kind regards,
John Warburton