ffmpeg | branch: master | Paul B Mahol <[email protected]> | Thu Mar 26 13:53:22 2020 +0100| [840e92da17b12ea34df5757e57eb1d33231bc6b7] | committer: Paul B Mahol
avfilter/vf_v360: improve sg input format Specifically unbreak yaw functionality. > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=840e92da17b12ea34df5757e57eb1d33231bc6b7 --- libavfilter/vf_v360.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/libavfilter/vf_v360.c b/libavfilter/vf_v360.c index a16fd17574..b3443f2001 100644 --- a/libavfilter/vf_v360.c +++ b/libavfilter/vf_v360.c @@ -1742,8 +1742,11 @@ static int xyz_to_stereographic(const V360Context *s, const float *vec, int width, int height, int16_t us[4][4], int16_t vs[4][4], float *du, float *dv) { - const float x = vec[0] / (1.f - vec[1]) / s->iflat_range[0] * s->input_mirror_modifier[0]; - const float y = vec[2] / (1.f - vec[1]) / s->iflat_range[1] * s->input_mirror_modifier[1]; + const float theta = acosf(-vec[2]); + const float r = tanf(theta * 0.5f); + const float c = r / hypotf(vec[0], vec[1]); + const float x = vec[0] * c / s->iflat_range[0] * s->input_mirror_modifier[0]; + const float y = -vec[1] * c / s->iflat_range[1] * s->input_mirror_modifier[1]; const float uf = (x + 1.f) * width / 2.f; const float vf = (y + 1.f) * height / 2.f; _______________________________________________ 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".
