ffmpeg | branch: master | Paul B Mahol <[email protected]> | Thu Mar 26 13:37:13 2020 +0100| [7931e766ade210b3960aba987497d5bd2eeadcf4] | committer: Paul B Mahol
avfilter/vf_v360: improve sg output format > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7931e766ade210b3960aba987497d5bd2eeadcf4 --- libavfilter/vf_v360.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c index fe0c9f3c4d..a16fd17574 100644 --- a/libavfilter/vf_v360.c +++ b/libavfilter/vf_v360.c @@ -1696,11 +1696,13 @@ static int stereographic_to_xyz(const V360Context *s, { const float x = ((2.f * i + 1.f) / width - 1.f) * s->flat_range[0]; const float y = ((2.f * j + 1.f) / height - 1.f) * s->flat_range[1]; - const float xy = x * x + y * y; + const float r = hypotf(x, y); + const float theta = atanf(r) * 2.f; + const float sin_theta = sinf(theta); - vec[0] = 2.f * x / (1.f + xy); - vec[1] = (-1.f + xy) / (1.f + xy); - vec[2] = 2.f * y / (1.f + xy); + vec[0] = x / r * sin_theta; + vec[1] = -y / r * sin_theta; + vec[2] = -cosf(theta); normalize_vector(vec); _______________________________________________ ffmpeg-cvslog mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
