libmpcodecs/vf_hue.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <inttypes.h>
   5 #include <math.h>
   6
   7 #include "config.h"
   8 #include "mp_msg.h"
   9 #include "cpudetect.h"
  10
  11 #include "img_format.h"
  12 #include "mp_image.h"
  13 #include "vf.h"
  14
  15 #include "libvo/video_out.h"
  16
  17 #include "m_option.h"
  18 #include "m_struct.h"
  19
  20 static struct vf_priv_s {
  21         uint8_t *buf[2];
  22         float hue;
  23         float saturation;
  24 } const vf_priv_dflt = {
  25   {NULL, NULL},
  26   0.0,
  27   1.0,
  28 };
  29
  30 static void process_C(uint8_t *udst, uint8_t *vdst, uint8_t *usrc, uint8_t *vsrc, int dststride, int srcstride,
  31                     int w, int h, float hue, float sat)
  32 {
  33         int i;
  34         const int s= rint(sin(hue) * (1<<16) * sat);
  35         const int c= rint(cos(hue) * (1<<16) * sat);
  36
  37         while (h--) {
  38                 for (i = 0; i<w; i++)
  39                 {
  40                         const int u= usrc[i] - 128;
  41                         const int v= vsrc[i] - 128;
  42                         int new_u= (c*u - s*v + (1<<15) + (128<<16))>>16;
  43                         int new_v= (s*u + c*v + (1<<15) + (128<<16))>>16;
  44                         if(new_u & 768) new_u= (-new_u)>>31;
  45                         if(new_v & 768) new_v= (-new_v)>>31;
  46                         udst[i]= new_u;
  47                         vdst[i]= new_v;
  48                 }
  49                 usrc += srcstride;
  50                 vsrc += srcstride;
  51                 udst += dststride;
  52                 vdst += dststride;
  53         }
  54 }
  55
  56 static void (*process)(uint8_t *udst, uint8_t *vdst, uint8_t *usrc, uint8_t *vsrc, int dststride, int srcstride,
  57                     int w, int h, float hue, float sat);
  58
  59 /* FIXME: add packed yuv version of process */
  60
  61 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts)
  62 {
  63         mp_image_t *dmpi;
  64
  65         dmpi=vf_get_image(vf->next, mpi->imgfmt,
  66                           MP_IMGTYPE_EXPORT, 0,
  67                           mpi->w, mpi->h);
  68
  69         dmpi->planes[0] = mpi->planes[0];
  70         dmpi->stride[0] = mpi->stride[0];
  71         dmpi->stride[1] = mpi->stride[1];
  72         dmpi->stride[2] = mpi->stride[2];
  73
  74         if (!vf->priv->buf[0]){
  75                 vf->priv->buf[0] = malloc(mpi->stride[1]*mpi->h >> mpi->chroma_y_shift);
  76                 vf->priv->buf[1] = malloc(mpi->stride[2]*mpi->h >> mpi->chroma_y_shift);
  77         }
  78
  79         if (vf->priv->hue == 0 && vf->priv->saturation == 1){
  80                 dmpi->planes[1] = mpi->planes[1];
  81                 dmpi->planes[2] = mpi->planes[2];
  82         }else {
  83                 dmpi->planes[1] = vf->priv->buf[0];
  84                 dmpi->planes[2] = vf->priv->buf[1];
  85                 process(dmpi->planes[1], dmpi->planes[2],
  86                         mpi->planes[1], mpi->planes[2],
  87                         dmpi->stride[1],mpi->stride[1],
  88                         mpi->w>> mpi->chroma_x_shift, mpi->h>> mpi->chroma_y_shift,
  89                         vf->priv->hue, vf->priv->saturation);
  90         }
  91
  92         return vf_next_put_image(vf,dmpi, pts);
  93 }
  94
  95 static int control(struct vf_instance_s* vf, int request, void* data)
  96 {
  97         vf_equalizer_t *eq;
  98
  99         switch (request) {
 100         case VFCTRL_SET_EQUALIZER:
 101                 eq = data;
 102                 if (!strcmp(eq->item,"hue")) {
 103                         vf->priv->hue = eq->value * M_PI / 100;
 104                         return CONTROL_TRUE;
 105                 } else if (!strcmp(eq->item,"saturation")) {
 106                         vf->priv->saturation = (eq->value + 100)/100.0;
 107                         return CONTROL_TRUE;
 108                 }
 109                 break;
 110         case VFCTRL_GET_EQUALIZER:
 111                 eq = data;
 112                 if (!strcmp(eq->item,"hue")) {
 113                         eq->value = rint(vf->priv->hue *100 / M_PI);
 114                         return CONTROL_TRUE;
 115                 }else if (!strcmp(eq->item,"saturation")) {
 116                         eq->value = rint(vf->priv->saturation*100 - 100);
 117                         return CONTROL_TRUE;
 118                 }
 119                 break;
 120         }
 121         return vf_next_control(vf, request, data);
 122 }
 123
 124 static int query_format(struct vf_instance_s* vf, unsigned int fmt)
 125 {
 126         switch (fmt) {
 127         case IMGFMT_YVU9:
 128         case IMGFMT_IF09:
 129         case IMGFMT_YV12:
 130         case IMGFMT_I420:
 131         case IMGFMT_IYUV:
 132         case IMGFMT_CLPL:
 133         case IMGFMT_444P:
 134         case IMGFMT_422P:
 135         case IMGFMT_411P:
 136                 return vf_next_query_format(vf, fmt);
 137         }
 138         return 0;
 139 }
 140
 141 static void uninit(struct vf_instance_s* vf)
 142 {
 143         if (vf->priv->buf[0]) free(vf->priv->buf[0]);
 144         if (vf->priv->buf[1]) free(vf->priv->buf[1]);
 145         free(vf->priv);
 146 }
 147
 148 static int open(vf_instance_t *vf, char* args)
 149 {
 150         vf->control=control;
 151         vf->query_format=query_format;
 152         vf->put_image=put_image;
 153         vf->uninit=uninit;
 154
 155         if(!vf->priv) {
 156         vf->priv = malloc(sizeof(struct vf_priv_s));
 157         memset(vf->priv, 0, sizeof(struct vf_priv_s));
 158         }
 159         if (args) sscanf(args, "%f:%f", &vf->priv->hue, &vf->priv->saturation);
 160         vf->priv->hue *= M_PI / 180.0;
 161
 162         process = process_C;
 163         return 1;
 164 }
 165
 166 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 167 static m_option_t vf_opts_fields[] = {
 168   {"hue", ST_OFF(hue), CONF_TYPE_FLOAT, M_OPT_RANGE,-180.0 ,180.0, NULL},
 169   {"saturation", ST_OFF(saturation), CONF_TYPE_FLOAT, M_OPT_RANGE,-10.0 ,10.0, NULL},
 170   { NULL, NULL, 0, 0, 0, 0,  NULL }
 171 };
 172
 173 static m_struct_t vf_opts = {
 174   "hue",
 175   sizeof(struct vf_priv_s),
 176   &vf_priv_dflt,
 177   vf_opts_fields
 178 };
 179
 180 const vf_info_t vf_info_hue = {
 181         "hue changer",
 182         "hue",
 183         "Michael Niedermayer",
 184         "",
 185         open,
 186         &vf_opts
 187 };
 188