libmpcodecs/vf_ass.c

   1 /*
   2  * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
   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 "config.h"
  22
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <inttypes.h>
  27 #include <assert.h>
  28
  29 #include "config.h"
  30 #include "mp_msg.h"
  31 #include "options.h"
  32
  33 #include "img_format.h"
  34 #include "mp_image.h"
  35 #include "vf.h"
  36 #include "sub/dec_sub.h"
  37
  38 #include "libvo/fastmemcpy.h"
  39
  40 #include "m_option.h"
  41 #include "m_struct.h"
  42
  43 #include "sub/ass_mp.h"
  44
  45 #define _r(c)  ((c)>>24)
  46 #define _g(c)  (((c)>>16)&0xFF)
  47 #define _b(c)  (((c)>>8)&0xFF)
  48 #define _a(c)  ((c)&0xFF)
  49 #define rgba2y(c)  ( (( 263*_r(c) + 516*_g(c) + 100*_b(c)) >> 10) + 16  )
  50 #define rgba2u(c)  ( ((-152*_r(c) - 298*_g(c) + 450*_b(c)) >> 10) + 128 )
  51 #define rgba2v(c)  ( (( 450*_r(c) - 376*_g(c) -  73*_b(c)) >> 10) + 128 )
  52
  53
  54 static const struct vf_priv_s {
  55     int outh, outw;
  56
  57     unsigned int outfmt;
  58
  59     // 1 = auto-added filter: insert only if chain does not support EOSD already
  60     // 0 = insert always
  61     int auto_insert;
  62
  63     struct osd_state *osd;
  64     double aspect_correction;
  65
  66     unsigned char *planes[3];
  67     struct line_limits {
  68         uint16_t start;
  69         uint16_t end;
  70     } *line_limits;
  71 } vf_priv_dflt;
  72
  73 static int config(struct vf_instance *vf,
  74                   int width, int height, int d_width, int d_height,
  75                   unsigned int flags, unsigned int outfmt)
  76 {
  77     struct MPOpts *opts = vf->opts;
  78     if (outfmt == IMGFMT_IF09)
  79         return 0;
  80
  81     vf->priv->outh = height + opts->ass_top_margin + opts->ass_bottom_margin;
  82     vf->priv->outw = width;
  83
  84     if (!opts->screen_size_x && !opts->screen_size_y) {
  85         d_width = d_width * vf->priv->outw / width;
  86         d_height = d_height * vf->priv->outh / height;
  87     }
  88
  89     vf->priv->planes[1]   = malloc(vf->priv->outw * vf->priv->outh);
  90     vf->priv->planes[2]   = malloc(vf->priv->outw * vf->priv->outh);
  91     vf->priv->line_limits = malloc((vf->priv->outh + 1) / 2 * sizeof(*vf->priv->line_limits));
  92
  93     vf->priv->aspect_correction = (double)width / height * d_height / d_width;
  94
  95     return vf_next_config(vf, vf->priv->outw, vf->priv->outh, d_width,
  96                           d_height, flags, outfmt);
  97 }
  98
  99 static void get_image(struct vf_instance *vf, mp_image_t *mpi)
 100 {
 101     if (mpi->type == MP_IMGTYPE_IPB)
 102         return;
 103     if (mpi->flags & MP_IMGFLAG_PRESERVE)
 104         return;
 105     if (mpi->imgfmt != vf->priv->outfmt)
 106         return;                                     // colorspace differ
 107
 108     // width never changes, always try full DR
 109     mpi->priv = vf->dmpi = vf_get_image(vf->next, mpi->imgfmt, mpi->type,
 110                                         mpi->flags | MP_IMGFLAG_READABLE,
 111                                         vf->priv->outw, vf->priv->outh);
 112
 113     if ((vf->dmpi->flags & MP_IMGFLAG_DRAW_CALLBACK) &&
 114         !(vf->dmpi->flags & MP_IMGFLAG_DIRECT)) {
 115         mp_tmsg(MSGT_ASS, MSGL_INFO, "Full DR not possible, trying SLICES instead!\n");
 116         return;
 117     }
 118
 119     int tmargin = vf->opts->ass_top_margin;
 120     // set up mpi as a cropped-down image of dmpi:
 121     if (mpi->flags & MP_IMGFLAG_PLANAR) {
 122         mpi->planes[0] = vf->dmpi->planes[0] +  tmargin * vf->dmpi->stride[0];
 123         mpi->planes[1] = vf->dmpi->planes[1] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[1];
 124         mpi->planes[2] = vf->dmpi->planes[2] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[2];
 125         mpi->stride[1] = vf->dmpi->stride[1];
 126         mpi->stride[2] = vf->dmpi->stride[2];
 127     } else {
 128         mpi->planes[0] = vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0];
 129     }
 130     mpi->stride[0] = vf->dmpi->stride[0];
 131     mpi->width = vf->dmpi->width;
 132     mpi->flags |= MP_IMGFLAG_DIRECT;
 133     mpi->flags &= ~MP_IMGFLAG_DRAW_CALLBACK;
 134 //      vf->dmpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
 135 }
 136
 137 static void blank(mp_image_t *mpi, int y1, int y2)
 138 {
 139     int color[3] = {16, 128, 128};    // black (YUV)
 140     int y;
 141     unsigned char *dst;
 142     int chroma_rows = (y2 - y1) >> mpi->chroma_y_shift;
 143
 144     dst = mpi->planes[0] + y1 * mpi->stride[0];
 145     for (y = 0; y < y2 - y1; ++y) {
 146         memset(dst, color[0], mpi->w);
 147         dst += mpi->stride[0];
 148     }
 149     dst = mpi->planes[1] + (y1 >> mpi->chroma_y_shift) * mpi->stride[1];
 150     for (y = 0; y < chroma_rows; ++y) {
 151         memset(dst, color[1], mpi->chroma_width);
 152         dst += mpi->stride[1];
 153     }
 154     dst = mpi->planes[2] + (y1 >> mpi->chroma_y_shift) * mpi->stride[2];
 155     for (y = 0; y < chroma_rows; ++y) {
 156         memset(dst, color[2], mpi->chroma_width);
 157         dst += mpi->stride[2];
 158     }
 159 }
 160
 161 static int prepare_image(struct vf_instance *vf, mp_image_t *mpi)
 162 {
 163     struct MPOpts *opts = vf->opts;
 164     int tmargin = opts->ass_top_margin;
 165     if (mpi->flags & MP_IMGFLAG_DIRECT
 166         || mpi->flags & MP_IMGFLAG_DRAW_CALLBACK) {
 167         vf->dmpi = mpi->priv;
 168         if (!vf->dmpi) {
 169             mp_tmsg(MSGT_ASS, MSGL_WARN, "Why do we get NULL??\n");
 170             return 0;
 171         }
 172         mpi->priv = NULL;
 173         // we've used DR, so we're ready...
 174         if (tmargin)
 175             blank(vf->dmpi, 0, tmargin);
 176         if (opts->ass_bottom_margin)
 177             blank(vf->dmpi, vf->priv->outh - opts->ass_bottom_margin,
 178                   vf->priv->outh);
 179         if (!(mpi->flags & MP_IMGFLAG_PLANAR))
 180             vf->dmpi->planes[1] = mpi->planes[1];             // passthrough rgb8 palette
 181         return 0;
 182     }
 183
 184     // hope we'll get DR buffer:
 185     vf->dmpi = vf_get_image(vf->next, vf->priv->outfmt, MP_IMGTYPE_TEMP,
 186                             MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_READABLE,
 187                             vf->priv->outw, vf->priv->outh);
 188
 189     // copy mpi->dmpi...
 190     if (mpi->flags & MP_IMGFLAG_PLANAR) {
 191         memcpy_pic(vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0],
 192                    mpi->planes[0],
 193                    mpi->w,
 194                    mpi->h,
 195                    vf->dmpi->stride[0],
 196                    mpi->stride[0]);
 197         memcpy_pic(vf->dmpi->planes[1] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[1],
 198                    mpi->planes[1],
 199                    mpi->w >> mpi->chroma_x_shift,
 200                    mpi->h >> mpi->chroma_y_shift,
 201                    vf->dmpi->stride[1],
 202                    mpi->stride[1]);
 203         memcpy_pic(vf->dmpi->planes[2] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[2],
 204                    mpi->planes[2],
 205                    mpi->w >> mpi->chroma_x_shift,
 206                    mpi->h >> mpi->chroma_y_shift,
 207                    vf->dmpi->stride[2],
 208                    mpi->stride[2]);
 209     } else {
 210         memcpy_pic(vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0],
 211                    mpi->planes[0],
 212                    mpi->w * (vf->dmpi->bpp / 8),
 213                    mpi->h,
 214                    vf->dmpi->stride[0],
 215                    mpi->stride[0]);
 216         vf->dmpi->planes[1] = mpi->planes[1];   // passthrough rgb8 palette
 217     }
 218     if (tmargin)
 219         blank(vf->dmpi, 0, tmargin);
 220     if (opts->ass_bottom_margin)
 221         blank(vf->dmpi, vf->priv->outh - opts->ass_bottom_margin,
 222               vf->priv->outh);
 223     return 0;
 224 }
 225
 226 static void update_limits(struct vf_instance *vf, int starty, int endy,
 227                           int startx, int endx)
 228 {
 229     starty >>= 1;
 230     endy = (endy + 1) >> 1;
 231     startx >>= 1;
 232     endx = (endx + 1) >> 1;
 233     for (int i = starty; i < endy; i++) {
 234         struct line_limits *ll = vf->priv->line_limits + i;
 235         if (startx < ll->start)
 236             ll->start = startx;
 237         if (endx > ll->end)
 238             ll->end = endx;
 239     }
 240 }
 241
 242 /**
 243  * \brief Copy specified rows from render_context.dmpi to render_context.planes, upsampling to 4:4:4
 244  */
 245 static void copy_from_image(struct vf_instance *vf)
 246 {
 247     int pl;
 248
 249     for (pl = 1; pl < 3; ++pl) {
 250         int dst_stride = vf->priv->outw;
 251         int src_stride = vf->dmpi->stride[pl];
 252
 253         unsigned char *src = vf->dmpi->planes[pl];
 254         unsigned char *dst = vf->priv->planes[pl];
 255         for (int i = 0; i < (vf->priv->outh + 1) / 2; i++) {
 256             struct line_limits *ll = vf->priv->line_limits + i;
 257             unsigned char *dst_next = dst + dst_stride;
 258             for (int j = ll->start; j < ll->end; j++) {
 259                 unsigned char val = src[j];
 260                 dst[j << 1] = val;
 261                 dst[(j << 1) + 1] = val;
 262                 dst_next[j << 1] = val;
 263                 dst_next[(j << 1) + 1] = val;
 264             }
 265             src += src_stride;
 266             dst = dst_next + dst_stride;
 267         }
 268     }
 269 }
 270
 271 /**
 272  * \brief Copy all previously copied rows back to render_context.dmpi
 273  */
 274 static void copy_to_image(struct vf_instance *vf)
 275 {
 276     int pl;
 277     int i, j;
 278     for (pl = 1; pl < 3; ++pl) {
 279         int dst_stride = vf->dmpi->stride[pl];
 280         int src_stride = vf->priv->outw;
 281
 282         unsigned char *dst      = vf->dmpi->planes[pl];
 283         unsigned char *src      = vf->priv->planes[pl];
 284         unsigned char *src_next = vf->priv->planes[pl] + src_stride;
 285         for (i = 0; i < vf->dmpi->chroma_height; ++i) {
 286             for (j = vf->priv->line_limits[i].start; j < vf->priv->line_limits[i].end; j++) {
 287                 unsigned val = 0;
 288                 val += src[j << 1];
 289                 val += src[(j << 1) + 1];
 290                 val += src_next[j << 1];
 291                 val += src_next[(j << 1) + 1];
 292                 dst[j] = val >> 2;
 293             }
 294             dst += dst_stride;
 295             src      = src_next + src_stride;
 296             src_next = src + src_stride;
 297         }
 298     }
 299 }
 300
 301 static void my_draw_bitmap(struct vf_instance *vf, unsigned char *bitmap,
 302                            int bitmap_w, int bitmap_h, int stride,
 303                            int dst_x, int dst_y, unsigned color)
 304 {
 305     unsigned char y = rgba2y(color);
 306     unsigned char u = rgba2u(color);
 307     unsigned char v = rgba2v(color);
 308     unsigned char opacity = 255 - _a(color);
 309     unsigned char *src, *dsty, *dstu, *dstv;
 310     int i, j;
 311     mp_image_t *dmpi = vf->dmpi;
 312
 313     src = bitmap;
 314     dsty = dmpi->planes[0] + dst_x + dst_y * dmpi->stride[0];
 315     dstu = vf->priv->planes[1] + dst_x + dst_y * vf->priv->outw;
 316     dstv = vf->priv->planes[2] + dst_x + dst_y * vf->priv->outw;
 317     for (i = 0; i < bitmap_h; ++i) {
 318         for (j = 0; j < bitmap_w; ++j) {
 319             unsigned k = (src[j] * opacity + 255) >> 8;
 320             dsty[j] = (k * y + (255 - k) * dsty[j] + 255) >> 8;
 321             dstu[j] = (k * u + (255 - k) * dstu[j] + 255) >> 8;
 322             dstv[j] = (k * v + (255 - k) * dstv[j] + 255) >> 8;
 323         }
 324         src  += stride;
 325         dsty += dmpi->stride[0];
 326         dstu += vf->priv->outw;
 327         dstv += vf->priv->outw;
 328     }
 329 }
 330
 331 static int render_frame(struct vf_instance *vf, mp_image_t *mpi,
 332                         const ASS_Image *img)
 333 {
 334     if (img) {
 335         for (int i = 0; i < (vf->priv->outh + 1) / 2; i++)
 336             vf->priv->line_limits[i] = (struct line_limits){65535, 0};
 337         for (const ASS_Image *im = img; im; im = im->next)
 338             update_limits(vf, im->dst_y, im->dst_y + im->h,
 339                           im->dst_x, im->dst_x + im->w);
 340         copy_from_image(vf);
 341         while (img) {
 342             my_draw_bitmap(vf, img->bitmap, img->w, img->h, img->stride,
 343                            img->dst_x, img->dst_y, img->color);
 344             img = img->next;
 345         }
 346         copy_to_image(vf);
 347     }
 348     return 0;
 349 }
 350
 351 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 352 {
 353     struct vf_priv_s *priv = vf->priv;
 354     struct MPOpts *opts = vf->opts;
 355     struct osd_state *osd = priv->osd;
 356     ASS_Image *images = 0;
 357     if (pts != MP_NOPTS_VALUE) {
 358         osd->dim = (struct mp_eosd_res){ .w = vf->priv->outw,
 359                                          .h = vf->priv->outh,
 360                                          .mt = opts->ass_top_margin,
 361                                          .mb = opts->ass_bottom_margin };
 362         osd->normal_scale = vf->priv->aspect_correction;
 363         osd->vsfilter_scale = 1;
 364         osd->sub_pts = pts - osd->sub_offset;
 365         osd->support_rgba = false;
 366         struct sub_bitmaps b;
 367         sub_get_bitmaps(osd, &b);
 368         images = b.imgs;
 369     }
 370
 371     prepare_image(vf, mpi);
 372     render_frame(vf, mpi, images);
 373
 374     return vf_next_put_image(vf, vf->dmpi, pts);
 375 }
 376
 377 static int query_format(struct vf_instance *vf, unsigned int fmt)
 378 {
 379     switch (fmt) {
 380     case IMGFMT_YV12:
 381     case IMGFMT_I420:
 382     case IMGFMT_IYUV:
 383         return vf_next_query_format(vf, vf->priv->outfmt);
 384     }
 385     return 0;
 386 }
 387
 388 static int control(vf_instance_t *vf, int request, void *data)
 389 {
 390     switch (request) {
 391     case VFCTRL_SET_OSD_OBJ:
 392         vf->priv->osd = data;
 393         break;
 394     case VFCTRL_INIT_EOSD:
 395         return CONTROL_TRUE;
 396     case VFCTRL_DRAW_EOSD:
 397         return CONTROL_TRUE;
 398     }
 399     return vf_next_control(vf, request, data);
 400 }
 401
 402 static void uninit(struct vf_instance *vf)
 403 {
 404     free(vf->priv->planes[1]);
 405     free(vf->priv->planes[2]);
 406     free(vf->priv->line_limits);
 407     free(vf->priv);
 408 }
 409
 410 static const unsigned int fmt_list[] = {
 411     IMGFMT_YV12,
 412     IMGFMT_I420,
 413     IMGFMT_IYUV,
 414     0
 415 };
 416
 417 static int vf_open(vf_instance_t *vf, char *args)
 418 {
 419     int flags;
 420     vf->priv->outfmt = vf_match_csp(&vf->next, fmt_list, IMGFMT_YV12);
 421     if (vf->priv->outfmt)
 422         flags = vf_next_query_format(vf, vf->priv->outfmt);
 423     if (!vf->priv->outfmt) {
 424         uninit(vf);
 425         return 0;
 426     } else if (vf->priv->auto_insert && flags & VFCAP_EOSD) {
 427         uninit(vf);
 428         return -1;
 429     }
 430
 431     if (vf->priv->auto_insert)
 432         mp_msg(MSGT_ASS, MSGL_INFO, "[ass] auto-open\n");
 433
 434     vf->config = config;
 435     vf->query_format = query_format;
 436     vf->uninit    = uninit;
 437     vf->control   = control;
 438     vf->get_image = get_image;
 439     vf->put_image = put_image;
 440     vf->default_caps = VFCAP_EOSD | VFCAP_EOSD_FILTER;
 441     return 1;
 442 }
 443
 444 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s, f)
 445 static const m_option_t vf_opts_fields[] = {
 446     {"auto", ST_OFF(auto_insert), CONF_TYPE_FLAG, 0, 0, 1, NULL},
 447     {NULL, NULL, 0, 0, 0, 0, NULL}
 448 };
 449
 450 static const m_struct_t vf_opts = {
 451     "ass",
 452     sizeof(struct vf_priv_s),
 453     &vf_priv_dflt,
 454     vf_opts_fields
 455 };
 456
 457 const vf_info_t vf_info_ass = {
 458     "Render ASS/SSA subtitles",
 459     "ass",
 460     "Evgeniy Stepanov",
 461     "",
 462     vf_open,
 463     &vf_opts
 464 };