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avcodec/x86/fdct: guard usage of undefined functions with preprocessor

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The asumption is that DCE will remove references to those functions.
However some compilers with certain instrumentation enabled doesn't DCE
those at all, resulting in linking failure. Tested with cl.exe -RTCu -RTCs.

Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
This commit is contained in:
Kacper Michajłow
2025-07-21 01:40:08 +02:00
parent 6bc23ab352
commit 9658d4425e
1 changed files with 2 additions and 0 deletions
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2
libavcodec/x86/fdctdsp_init.c
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@ -26,6 +26,7 @@
av_cold void ff_fdctdsp_init_x86(FDCTDSPContext *c, AVCodecContext *avctx, av_cold void ff_fdctdsp_init_x86(FDCTDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth) unsigned high_bit_depth)
{ {
#if HAVE_SSE2_INLINE
int cpu_flags = av_get_cpu_flags(); int cpu_flags = av_get_cpu_flags();
const int dct_algo = avctx->dct_algo; const int dct_algo = avctx->dct_algo;
@ -35,4 +36,5 @@ av_cold void ff_fdctdsp_init_x86(FDCTDSPContext *c, AVCodecContext *avctx,
c->fdct = ff_fdct_sse2; c->fdct = ff_fdct_sse2;
} }
} }
#endif
} }