diff options
Diffstat (limited to 'libmpcodecs/img_format.c')
-rw-r--r-- | libmpcodecs/img_format.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/libmpcodecs/img_format.c b/libmpcodecs/img_format.c index 2c83a643f7..d4f4d59f38 100644 --- a/libmpcodecs/img_format.c +++ b/libmpcodecs/img_format.c @@ -79,3 +79,40 @@ const char *vo_format_name(int format) snprintf(unknown_format,20,"Unknown 0x%04x",format); return unknown_format; } + +int mp_get_chroma_shift(int format, int *x_shift, int *y_shift) +{ + int xs = 0, ys = 0; + int err = 0; + switch (format) { + case IMGFMT_I420: + case IMGFMT_IYUV: + case IMGFMT_YV12: + xs = 1; + ys = 1; + break; + case IMGFMT_IF09: + case IMGFMT_YVU9: + xs = 2; + ys = 2; + break; + case IMGFMT_444P: + xs = 0; + ys = 0; + break; + case IMGFMT_422P: + xs = 1; + ys = 0; + break; + case IMGFMT_411P: + xs = 2; + ys = 0; + break; + default: + err = 1; + break; + } + if (x_shift) *x_shift = xs; + if (y_shift) *y_shift = ys; + return err ? 0 : 8 + (16 >> (xs + ys)); +} |