libmpcodecs/vf_screenshot.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include "config.h"
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <inttypes.h>
  25
  26 #include "mp_msg.h"
  27 #include "img_format.h"
  28 #include "mp_image.h"
  29 #include "vf.h"
  30 #include "vf_scale.h"
  31 #include "fmt-conversion.h"
  32 #include "libvo/fastmemcpy.h"
  33
  34 #include <libswscale/swscale.h>
  35
  36 struct vf_priv_s {
  37     mp_image_t *image;
  38     void (*image_callback)(void *, mp_image_t *);
  39     void *image_callback_ctx;
  40     int shot, store_slices;
  41 };
  42
  43 //===========================================================================//
  44
  45 static int config(struct vf_instance *vf,
  46                   int width, int height, int d_width, int d_height,
  47                   unsigned int flags, unsigned int outfmt)
  48 {
  49     free_mp_image(vf->priv->image);
  50     vf->priv->image = new_mp_image(width, height);
  51     mp_image_setfmt(vf->priv->image, outfmt);
  52     vf->priv->image->w = d_width;
  53     vf->priv->image->h = d_height;
  54     return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
  55 }
  56
  57 static void start_slice(struct vf_instance *vf, mp_image_t *mpi)
  58 {
  59     vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
  60         mpi->type, mpi->flags, mpi->width, mpi->height);
  61     if (vf->priv->shot) {
  62         vf->priv->store_slices = 1;
  63         if (!(vf->priv->image->flags & MP_IMGFLAG_ALLOCATED))
  64             mp_image_alloc_planes(vf->priv->image);
  65     }
  66
  67 }
  68
  69 static void memcpy_pic_slice(unsigned char *dst, unsigned char *src,
  70                              int bytesPerLine, int y, int h,
  71                              int dstStride, int srcStride)
  72 {
  73     memcpy_pic(dst + h * dstStride, src + h * srcStride, bytesPerLine,
  74                h, dstStride, srcStride);
  75 }
  76
  77 static void draw_slice(struct vf_instance *vf, unsigned char** src,
  78                        int* stride, int w,int h, int x, int y)
  79 {
  80     if (vf->priv->store_slices) {
  81         mp_image_t *dst = vf->priv->image;
  82         int bp = (dst->bpp + 7) / 8;
  83
  84         if (dst->flags & MP_IMGFLAG_PLANAR) {
  85             int bytes_per_line[3] = { w * bp, dst->chroma_width, dst->chroma_width };
  86             for (int n = 0; n < 3; n++) {
  87                 memcpy_pic_slice(dst->planes[n], src[n], bytes_per_line[n],
  88                                  y, h, dst->stride[n], stride[n]);
  89             }
  90         } else {
  91             memcpy_pic_slice(dst->planes[0], src[0], dst->w*bp, y, dst->h,
  92                              dst->stride[0], stride[0]);
  93         }
  94     }
  95     vf_next_draw_slice(vf,src,stride,w,h,x,y);
  96 }
  97
  98 static void get_image(struct vf_instance *vf, mp_image_t *mpi)
  99 {
 100     // FIXME: should vf.c really call get_image when using slices??
 101     if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK)
 102       return;
 103     vf->dmpi= vf_get_image(vf->next, mpi->imgfmt,
 104                            mpi->type, mpi->flags/* | MP_IMGFLAG_READABLE*/, mpi->width, mpi->height);
 105
 106     for (int i = 0; i < MP_MAX_PLANES; i++) {
 107         mpi->planes[i]=vf->dmpi->planes[i];
 108         mpi->stride[i]=vf->dmpi->stride[i];
 109     }
 110     mpi->width=vf->dmpi->width;
 111
 112     mpi->flags|=MP_IMGFLAG_DIRECT;
 113
 114     mpi->priv=(void*)vf->dmpi;
 115 }
 116
 117 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 118 {
 119     mp_image_t *dmpi = (mp_image_t *)mpi->priv;
 120
 121     if (mpi->flags & MP_IMGFLAG_DRAW_CALLBACK)
 122       dmpi = vf->dmpi;
 123     else
 124     if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
 125         dmpi=vf_get_image(vf->next,mpi->imgfmt,
 126                                     MP_IMGTYPE_EXPORT, 0,
 127                                     mpi->width, mpi->height);
 128         vf_clone_mpi_attributes(dmpi, mpi);
 129         for (int i = 0; i < MP_MAX_PLANES; i++) {
 130             dmpi->planes[i]=mpi->planes[i];
 131             dmpi->stride[i]=mpi->stride[i];
 132         }
 133         dmpi->width=mpi->width;
 134         dmpi->height=mpi->height;
 135     }
 136
 137     if(vf->priv->shot) {
 138         vf->priv->shot=0;
 139         mp_image_t image;
 140         if (!vf->priv->store_slices)
 141             image = *dmpi;
 142         else
 143             image = *vf->priv->image;
 144         image.w = vf->priv->image->w;
 145         image.h = vf->priv->image->h;
 146         vf->priv->image_callback(vf->priv->image_callback_ctx, &image);
 147         vf->priv->store_slices = 0;
 148     }
 149
 150     return vf_next_put_image(vf, dmpi, pts);
 151 }
 152
 153 static int control (vf_instance_t *vf, int request, void *data)
 154 {
 155     if(request==VFCTRL_SCREENSHOT) {
 156         struct vf_ctrl_screenshot *cmd = (struct vf_ctrl_screenshot *)data;
 157         vf->priv->image_callback = cmd->image_callback;
 158         vf->priv->image_callback_ctx = cmd->image_callback_ctx;
 159         vf->priv->shot=1;
 160         return CONTROL_TRUE;
 161     }
 162     return vf_next_control (vf, request, data);
 163 }
 164
 165
 166 //===========================================================================//
 167
 168 static int query_format(struct vf_instance *vf, unsigned int fmt)
 169 {
 170     enum PixelFormat av_format = imgfmt2pixfmt(fmt);
 171
 172     if (av_format != PIX_FMT_NONE && sws_isSupportedInput(av_format))
 173         return vf_next_query_format(vf, fmt);
 174     return 0;
 175 }
 176
 177 static void uninit(vf_instance_t *vf)
 178 {
 179     free_mp_image(vf->priv->image);
 180     free(vf->priv);
 181 }
 182
 183 static int vf_open(vf_instance_t *vf, char *args)
 184 {
 185     vf->config=config;
 186     vf->control=control;
 187     vf->put_image=put_image;
 188     vf->query_format=query_format;
 189     vf->start_slice=start_slice;
 190     vf->draw_slice=draw_slice;
 191     vf->get_image=get_image;
 192     vf->uninit=uninit;
 193     vf->priv=malloc(sizeof(struct vf_priv_s));
 194     vf->priv->shot=0;
 195     vf->priv->store_slices=0;
 196     vf->priv->image=NULL;
 197     return 1;
 198 }
 199
 200
 201 const vf_info_t vf_info_screenshot = {
 202     "screenshot to file",
 203     "screenshot",
 204     "A'rpi, Jindrich Makovicka",
 205     "",
 206     vf_open,
 207     NULL
 208 };
 209
 210 //===========================================================================//