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author | Paul B Mahol <onemda@gmail.com> | 2019-09-14 17:40:46 +0200 |
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committer | Paul B Mahol <onemda@gmail.com> | 2019-09-14 17:40:46 +0200 |
commit | 451cee662c379489f6f3ddeef6561aa201aa51b0 (patch) | |
tree | b6ffaafa032fa9f56001b5ca51fc5d8454682d86 /libavfilter | |
parent | 2a672a93d248afc2e9199cef50930c598ff34ad5 (diff) | |
download | ffmpeg-streaming-451cee662c379489f6f3ddeef6561aa201aa51b0.zip ffmpeg-streaming-451cee662c379489f6f3ddeef6561aa201aa51b0.tar.gz |
avfilter/vf_v360: reduce by one cosf call less
Diffstat (limited to 'libavfilter')
-rw-r--r-- | libavfilter/vf_v360.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c index 39a96f1..3be302d 100644 --- a/libavfilter/vf_v360.c +++ b/libavfilter/vf_v360.c @@ -1827,9 +1827,14 @@ static void dfisheye_to_xyz(const V360Context *s, const float phi = M_PI + atan2f(vf, uf * m); const float theta = m * M_PI_2 * (1.f - hypotf(uf, vf)); - vec[0] = cosf(theta) * cosf(phi); - vec[1] = cosf(theta) * sinf(phi); - vec[2] = sinf(theta); + const float sin_phi = sinf(phi); + const float cos_phi = cosf(phi); + const float sin_theta = sinf(theta); + const float cos_theta = cosf(theta); + + vec[0] = cos_theta * cos_phi; + vec[1] = cos_theta * sin_phi; + vec[2] = sin_theta; normalize_vector(vec); } |