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avcodec/dca_core: Only call emms_c() if needed 

It is not needed on x64, because the AV_COPY* and AV_ZERO*
macros never use MMX on x64.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-09-08 15:09:26 +02:00
parent 29c4c0886d
commit df215e5758
1 changed files with 8 additions and 0 deletions
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8
libavcodec/dca_core.c
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@ -767,7 +767,9 @@ static void erase_adpcm_history(DCACoreDecoder *s)
for (band = 0; band < DCA_SUBBANDS; band++)
AV_ZERO128(s->subband_samples[ch][band] - DCA_ADPCM_COEFFS);
#ifdef FF_COPY_SWAP_ZERO_USES_MMX
emms_c();
#endif
}
static int alloc_sample_buffer(DCACoreDecoder *s)
@ -831,7 +833,9 @@ static int parse_frame_data(DCACoreDecoder *s, enum HeaderType header, int xch_b
}
}
#ifdef FF_COPY_SWAP_ZERO_USES_MMX
emms_c();
#endif
return 0;
}
@ -1276,7 +1280,9 @@ static void erase_x96_adpcm_history(DCACoreDecoder *s)
for (band = 0; band < DCA_SUBBANDS_X96; band++)
AV_ZERO128(s->x96_subband_samples[ch][band] - DCA_ADPCM_COEFFS);
#ifdef FF_COPY_SWAP_ZERO_USES_MMX
emms_c();
#endif
}
static int alloc_x96_sample_buffer(DCACoreDecoder *s)
@ -1506,7 +1512,9 @@ static int parse_x96_frame_data(DCACoreDecoder *s, int exss, int xch_base)
}
}
#ifdef FF_COPY_SWAP_ZERO_USES_MMX
emms_c();
#endif
return 0;
}