diff options
Diffstat (limited to 'libavfilter/libmpcodecs/vf_qp.c')
| -rw-r--r-- | libavfilter/libmpcodecs/vf_qp.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/libavfilter/libmpcodecs/vf_qp.c b/libavfilter/libmpcodecs/vf_qp.c new file mode 100644 index 0000000000..d74f138662 --- /dev/null +++ b/libavfilter/libmpcodecs/vf_qp.c @@ -0,0 +1,177 @@ +/* + * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at> + * + * This file is part of MPlayer. + * + * MPlayer is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * MPlayer is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with MPlayer; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <math.h> +#include <inttypes.h> + +#include "mp_msg.h" +#include "cpudetect.h" +#include "img_format.h" +#include "mp_image.h" +#include "vf.h" +#include "libvo/fastmemcpy.h" + +#include "libavcodec/avcodec.h" +#include "libavutil/eval.h" + + +struct vf_priv_s { + char eq[200]; + int8_t *qp; + int8_t lut[257]; + int qp_stride; +}; + +static int config(struct vf_instance *vf, + int width, int height, int d_width, int d_height, + unsigned int flags, unsigned int outfmt){ + int h= (height+15)>>4; + int i; + + vf->priv->qp_stride= (width+15)>>4; + vf->priv->qp= av_malloc(vf->priv->qp_stride*h*sizeof(int8_t)); + + for(i=-129; i<128; i++){ + double const_values[]={ + M_PI, + M_E, + i != -129, + i, + 0 + }; + static const char *const_names[]={ + "PI", + "E", + "known", + "qp", + NULL + }; + double temp_val; + int res; + + res= av_expr_parse_and_eval(&temp_val, vf->priv->eq, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, NULL); + + if (res < 0){ + mp_msg(MSGT_VFILTER, MSGL_ERR, "qp: Error evaluating \"%s\" \n", vf->priv->eq); + return 0; + } + vf->priv->lut[i+129]= lrintf(temp_val); + } + + return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt); +} + +static void get_image(struct vf_instance *vf, mp_image_t *mpi){ + if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change + // ok, we can do pp in-place (or pp disabled): + vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, + mpi->type, mpi->flags, mpi->w, mpi->h); + mpi->planes[0]=vf->dmpi->planes[0]; + mpi->stride[0]=vf->dmpi->stride[0]; + mpi->width=vf->dmpi->width; + if(mpi->flags&MP_IMGFLAG_PLANAR){ + mpi->planes[1]=vf->dmpi->planes[1]; + mpi->planes[2]=vf->dmpi->planes[2]; + mpi->stride[1]=vf->dmpi->stride[1]; + mpi->stride[2]=vf->dmpi->stride[2]; + } + mpi->flags|=MP_IMGFLAG_DIRECT; +} + +static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){ + mp_image_t *dmpi; + int x,y; + + if(!(mpi->flags&MP_IMGFLAG_DIRECT)){ + // no DR, so get a new image! hope we'll get DR buffer: + vf->dmpi=vf_get_image(vf->next,mpi->imgfmt, + MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE, + mpi->w,mpi->h); + } + + dmpi= vf->dmpi; + + if(!(mpi->flags&MP_IMGFLAG_DIRECT)){ + memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h, dmpi->stride[0], mpi->stride[0]); + if(mpi->flags&MP_IMGFLAG_PLANAR){ + memcpy_pic(dmpi->planes[1], mpi->planes[1], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, dmpi->stride[1], mpi->stride[1]); + memcpy_pic(dmpi->planes[2], mpi->planes[2], mpi->w>>mpi->chroma_x_shift, mpi->h>>mpi->chroma_y_shift, dmpi->stride[2], mpi->stride[2]); + } + } + vf_clone_mpi_attributes(dmpi, mpi); + + dmpi->qscale = vf->priv->qp; + dmpi->qstride= vf->priv->qp_stride; + if(mpi->qscale){ + for(y=0; y<((dmpi->h+15)>>4); y++){ + for(x=0; x<vf->priv->qp_stride; x++){ + dmpi->qscale[x + dmpi->qstride*y]= + vf->priv->lut[ 129 + ((int8_t)mpi->qscale[x + mpi->qstride*y]) ]; + } + } + }else{ + int qp= vf->priv->lut[0]; + for(y=0; y<((dmpi->h+15)>>4); y++){ + for(x=0; x<vf->priv->qp_stride; x++){ + dmpi->qscale[x + dmpi->qstride*y]= qp; + } + } + } + + return vf_next_put_image(vf,dmpi, pts); +} + +static void uninit(struct vf_instance *vf){ + if(!vf->priv) return; + + av_free(vf->priv->qp); + vf->priv->qp= NULL; + + av_free(vf->priv); + vf->priv=NULL; +} + +//===========================================================================// +static int vf_open(vf_instance_t *vf, char *args){ + vf->config=config; + vf->put_image=put_image; + vf->get_image=get_image; + vf->uninit=uninit; + vf->priv=av_malloc(sizeof(struct vf_priv_s)); + memset(vf->priv, 0, sizeof(struct vf_priv_s)); + +// avcodec_init(); + + if (args) strncpy(vf->priv->eq, args, 199); + + return 1; +} + +const vf_info_t vf_info_qp = { + "QP changer", + "qp", + "Michael Niedermayer", + "", + vf_open, + NULL +}; |