The use of float based functions is both unneeded and wrong due to
unpredictable rounding
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavcodec/evc_parse.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/libavcodec/evc_parse.c b/libavcodec/evc_parse.c
index 5ab33166cf3..20b6849041a 100644
--- a/libavcodec/evc_parse.c
+++ b/libavcodec/evc_parse.c
@@ -176,7 +176,8 @@ int ff_evc_derive_poc(const EVCParamSets *ps, const
EVCParserSliceHeader *sh,
poc->PicOrderCntVal = 0;
poc->DocOffset = -1;
} else {
- int SubGopLength = (int)pow(2.0, sps->log2_sub_gop_length);
+ int SubGopLength = 1 << sps->log2_sub_gop_length;
+
if (tid == 0) {
poc->PicOrderCntVal = poc->prevPicOrderCntVal + SubGopLength;
poc->DocOffset = 0;
@@ -191,15 +192,16 @@ int ff_evc_derive_poc(const EVCParamSets *ps, const
EVCParserSliceHeader *sh,
poc->prevPicOrderCntVal += SubGopLength;
ExpectedTemporalId = 0;
} else
- ExpectedTemporalId = 1 + (int)log2(poc->DocOffset);
+ ExpectedTemporalId = 1 + av_log2(poc->DocOffset);
+
while (tid != ExpectedTemporalId) {
poc->DocOffset = (poc->DocOffset + 1) % SubGopLength;
if (poc->DocOffset == 0)
ExpectedTemporalId = 0;
else
- ExpectedTemporalId = 1 + (int)log2(poc->DocOffset);
+ ExpectedTemporalId = 1 + av_log2(poc->DocOffset);
}
- PocOffset = (int)(SubGopLength * ((2.0 * poc->DocOffset + 1) /
(int)pow(2.0, tid) - 2));
+ PocOffset = (int)(SubGopLength * ((2.0 * poc->DocOffset + 1) /
(1 << tid) - 2));
poc->PicOrderCntVal = poc->prevPicOrderCntVal + PocOffset;
}
}
--
2.17.1
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
To unsubscribe, visit link above, or email
ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
