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| author | Michael Niedermayer <michaelni@gmx.at> | 2012-08-05 22:17:02 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2012-08-05 22:17:02 +0200 |
| commit | b4780d03d04d402b490be21b01ec886565cabe29 (patch) | |
| tree | 2c5605baa7b588cced8f79c2916eb724356d5c25 /libavutil/rational.h | |
| parent | 69aeba1396d5a13e79cbc3cc9f49fd6896addb82 (diff) | |
| parent | 2096857551660649dbe9a5aad7338b0872858575 (diff) | |
| download | ffmpeg-b4780d03d04d402b490be21b01ec886565cabe29.tar.gz | |
Merge remote-tracking branch 'qatar/master'
* qatar/master:
x86: h264_idct: Rename x264_add8x4_idct_sse2 --> h264_add8x4_idct_sse2
rational: add av_inv_q() returning the inverse of an AVRational
dpx: Make start offset unsigned
lavfi: properly signal out-of-memory error in ff_filter_samples
cosmetics: Fix a few switched periods and linebreaks
zerocodec: Fix memleak in decode_frame
zerocodec: Cosmetics
Conflicts:
ffmpeg.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavutil/rational.h')
| -rw-r--r-- | libavutil/rational.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavutil/rational.h b/libavutil/rational.h index 8c2bdb5529..417e29e577 100644 --- a/libavutil/rational.h +++ b/libavutil/rational.h @@ -115,6 +115,17 @@ AVRational av_add_q(AVRational b, AVRational c) av_const; AVRational av_sub_q(AVRational b, AVRational c) av_const; /** + * Invert a rational. + * @param q value + * @return 1 / q + */ +static av_always_inline AVRational av_inv_q(AVRational q) +{ + AVRational r = { q.den, q.num }; + return r; +} + +/** * Convert a double precision floating point number to a rational. * inf is expressed as {1,0} or {-1,0} depending on the sign. * |