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author | rfelker <rfelker@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-01-23 16:33:57 +0000 |
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committer | rfelker <rfelker@b3059339-0415-0410-9bf9-f77b7e298cf2> | 2003-01-23 16:33:57 +0000 |
commit | b35ba6697cf6e58ded5c24672618e99e8e35867a (patch) | |
tree | 15c62b613d3bb53265a5988c6a635c3b585dd564 /libmpcodecs/vf_field.c | |
parent | 9c3153404fdb7bd150a53661b3b2534b5c00737f (diff) | |
download | mpv-b35ba6697cf6e58ded5c24672618e99e8e35867a.tar.bz2 mpv-b35ba6697cf6e58ded5c24672618e99e8e35867a.tar.xz |
new video filter to extract a single field using stride arithmetic,
i.e. without using cpu time
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@9073 b3059339-0415-0410-9bf9-f77b7e298cf2
Diffstat (limited to 'libmpcodecs/vf_field.c')
-rw-r--r-- | libmpcodecs/vf_field.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/libmpcodecs/vf_field.c b/libmpcodecs/vf_field.c new file mode 100644 index 0000000000..de321bf645 --- /dev/null +++ b/libmpcodecs/vf_field.c @@ -0,0 +1,74 @@ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "../config.h" +#include "../mp_msg.h" + +#include "mp_image.h" +#include "vf.h" + +#include "../libvo/fastmemcpy.h" + +struct vf_priv_s { + int field; + mp_image_t *dmpi; +}; + +//===========================================================================// + +static int config(struct vf_instance_s* vf, + int width, int height, int d_width, int d_height, + unsigned int flags, unsigned int outfmt){ + return vf_next_config(vf,width,height/2,d_width,d_height,flags,outfmt); +} + +static int put_image(struct vf_instance_s* vf, mp_image_t *mpi){ + if(mpi->flags&MP_IMGFLAG_DIRECT){ + // we've used DR, so we're ready... + return vf_next_put_image(vf,(mp_image_t*)mpi->priv); + } + + vf->priv->dmpi=vf_get_image(vf->next,mpi->imgfmt, + MP_IMGTYPE_EXPORT, MP_IMGFLAG_ACCEPT_STRIDE, + mpi->width, mpi->height/2); + + // set up mpi as a double-stride image of dmpi: + vf->priv->dmpi->planes[0]=mpi->planes[0]+mpi->stride[0]*vf->priv->field; + vf->priv->dmpi->stride[0]=2*mpi->stride[0]; + if(vf->priv->dmpi->flags&MP_IMGFLAG_PLANAR){ + vf->priv->dmpi->planes[1]=mpi->planes[1]+ + mpi->stride[1]*vf->priv->field; + vf->priv->dmpi->stride[1]=2*mpi->stride[1]; + vf->priv->dmpi->planes[2]=mpi->planes[2]+ + mpi->stride[2]*vf->priv->field; + vf->priv->dmpi->stride[2]=2*mpi->stride[2]; + } else + vf->priv->dmpi->planes[1]=mpi->planes[1]; // passthru bgr8 palette!!! + + return vf_next_put_image(vf,vf->priv->dmpi); +} + +//===========================================================================// + +// FIXME - do we need to free dmpi on uninit? + +static int open(vf_instance_t *vf, char* args){ + vf->config=config; + vf->put_image=put_image; + vf->default_reqs=VFCAP_ACCEPT_STRIDE; + vf->priv=calloc(1, sizeof(struct vf_priv_s)); + if (args) sscanf(args, "%d", &vf->priv->field); + vf->priv->field &= 1; + return 1; +} + +vf_info_t vf_info_field = { + "extract single field", + "field", + "Rich Felker", + "", + open +}; + +//===========================================================================// |