1 /*
2 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of MPlayer.
5 *
6 * MPlayer is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * MPlayer is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License along
17 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 */
20
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 #include <math.h>
25 #include <inttypes.h>
26
27 #include "mp_msg.h"
28 #include "cpudetect.h"
29 #include "img_format.h"
30 #include "mp_image.h"
31 #include "vf.h"
32 #include "libvo/fastmemcpy.h"
33
34 #include "libavcodec/avcodec.h"
35 #include "libavutil/eval.h"
36 #include "libavutil/mem.h"
37
38
39 struct vf_priv_s {
40 char eq[200];
41 int8_t *qp;
42 int8_t lut[257];
43 int qp_stride;
44 };
45
config(struct vf_instance * vf,int width,int height,int d_width,int d_height,unsigned int flags,unsigned int outfmt)46 static int config(struct vf_instance *vf,
47 int width, int height, int d_width, int d_height,
48 unsigned int flags, unsigned int outfmt){
49 int h= (height+15)>>4;
50 int i;
51
52 vf->priv->qp_stride= (width+15)>>4;
53 vf->priv->qp= av_malloc(vf->priv->qp_stride*h*sizeof(int8_t));
54
55 for(i=-129; i<128; i++){
56 double const_values[]={
57 M_PI,
58 M_E,
59 i != -129,
60 i,
61 0
62 };
63 static const char *const_names[]={
64 "PI",
65 "E",
66 "known",
67 "qp",
68 NULL
69 };
70 double temp_val;
71 int res;
72
73 res= av_expr_parse_and_eval(&temp_val, vf->priv->eq, const_names, const_values, NULL, NULL, NULL, NULL, NULL, 0, NULL);
74
75 if (res < 0){
76 mp_msg(MSGT_VFILTER, MSGL_ERR, "qp: Error evaluating \"%s\" \n", vf->priv->eq);
77 return 0;
78 }
79 vf->priv->lut[i+129]= lrintf(temp_val);
80 }
81
82 return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
83 }
84
get_image(struct vf_instance * vf,mp_image_t * mpi)85 static void get_image(struct vf_instance *vf, mp_image_t *mpi){
86 if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
87 // ok, we can do pp in-place (or pp disabled):
88 vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
89 mpi->type, mpi->flags, mpi->w, mpi->h);
90 mpi->planes[0]=vf->dmpi->planes[0];
91 mpi->stride[0]=vf->dmpi->stride[0];
92 mpi->width=vf->dmpi->width;
93 if(mpi->flags&MP_IMGFLAG_PLANAR){
94 mpi->planes[1]=vf->dmpi->planes[1];
95 mpi->planes[2]=vf->dmpi->planes[2];
96 mpi->stride[1]=vf->dmpi->stride[1];
97 mpi->stride[2]=vf->dmpi->stride[2];
98 }
99 mpi->flags|=MP_IMGFLAG_DIRECT;
100 }
101
put_image(struct vf_instance * vf,mp_image_t * mpi,double pts,double endpts)102 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts, double endpts){
103 mp_image_t *dmpi;
104 int x,y;
105
106 if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
107 // no DR, so get a new image! hope we'll get DR buffer:
108 vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
109 MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE|MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
110 mpi->w,mpi->h);
111 }
112
113 dmpi= vf->dmpi;
114
115 if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
116 memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h, dmpi->stride[0], mpi->stride[0]);
117 if(mpi->flags&MP_IMGFLAG_PLANAR){
118 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]);
119 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]);
120 }
121 }
122 vf_clone_mpi_attributes(dmpi, mpi);
123
124 dmpi->qscale = vf->priv->qp;
125 dmpi->qstride= vf->priv->qp_stride;
126 if(mpi->qscale){
127 for(y=0; y<((dmpi->h+15)>>4); y++){
128 for(x=0; x<vf->priv->qp_stride; x++){
129 dmpi->qscale[x + dmpi->qstride*y]=
130 vf->priv->lut[ 129 + ((int8_t)mpi->qscale[x + mpi->qstride*y]) ];
131 }
132 }
133 }else{
134 int qp= vf->priv->lut[0];
135 for(y=0; y<((dmpi->h+15)>>4); y++){
136 for(x=0; x<vf->priv->qp_stride; x++){
137 dmpi->qscale[x + dmpi->qstride*y]= qp;
138 }
139 }
140 }
141
142 return vf_next_put_image(vf, dmpi, pts, endpts);
143 }
144
uninit(struct vf_instance * vf)145 static void uninit(struct vf_instance *vf){
146 if(!vf->priv) return;
147
148 av_free(vf->priv->qp);
149 vf->priv->qp= NULL;
150
151 av_free(vf->priv);
152 vf->priv=NULL;
153 }
154
155 //===========================================================================//
vf_open(vf_instance_t * vf,char * args)156 static int vf_open(vf_instance_t *vf, char *args){
157 vf->config=config;
158 vf->put_image=put_image;
159 vf->get_image=get_image;
160 vf->uninit=uninit;
161 vf->priv=av_malloc(sizeof(struct vf_priv_s));
162 memset(vf->priv, 0, sizeof(struct vf_priv_s));
163
164 // avcodec_init();
165
166 if (args) strncpy(vf->priv->eq, args, 199);
167
168 return 1;
169 }
170
171 const vf_info_t vf_info_qp = {
172 "QP changer",
173 "qp",
174 "Michael Niedermayer",
175 "",
176 vf_open,
177 NULL
178 };
179