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/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     ASS_Renderer *renderer_realaspect;
  65     ASS_Renderer *renderer_vsfilter;
  66
  67     unsigned char *planes[3];
  68     struct line_limits {
  69         uint16_t start;
  70         uint16_t end;
  71     } *line_limits;
  72 } vf_priv_dflt;
  73
  74 extern float sub_delay;
  75
  76 static int config(struct vf_instance *vf,
  77                   int width, int height, int d_width, int d_height,
  78                   unsigned int flags, unsigned int outfmt)
  79 {
  80     struct MPOpts *opts = vf->opts;
  81     if (outfmt == IMGFMT_IF09)
  82         return 0;
  83
  84     vf->priv->outh = height + ass_top_margin + ass_bottom_margin;
  85     vf->priv->outw = width;
  86
  87     if (!opts->screen_size_x && !opts->screen_size_y) {
  88         d_width = d_width * vf->priv->outw / width;
  89         d_height = d_height * vf->priv->outh / height;
  90     }
  91
  92     vf->priv->planes[1]   = malloc(vf->priv->outw * vf->priv->outh);
  93     vf->priv->planes[2]   = malloc(vf->priv->outw * vf->priv->outh);
  94     vf->priv->line_limits = malloc((vf->priv->outh + 1) / 2 * sizeof(*vf->priv->line_limits));
  95
  96     if (vf->priv->renderer_realaspect) {
  97         mp_ass_configure(vf->priv->renderer_realaspect,
  98                          vf->priv->outw, vf->priv->outh, 0);
  99         mp_ass_configure(vf->priv->renderer_vsfilter,
 100                          vf->priv->outw, vf->priv->outh, 0);
 101         ass_set_aspect_ratio(vf->priv->renderer_realaspect,
 102                              (double)width / height * d_height / d_width, 1);
 103         ass_set_aspect_ratio(vf->priv->renderer_vsfilter, 1, 1);
 104     }
 105
 106     return vf_next_config(vf, vf->priv->outw, vf->priv->outh, d_width,
 107                           d_height, flags, outfmt);
 108 }
 109
 110 static void get_image(struct vf_instance *vf, mp_image_t *mpi)
 111 {
 112     if (mpi->type == MP_IMGTYPE_IPB)
 113         return;
 114     if (mpi->flags & MP_IMGFLAG_PRESERVE)
 115         return;
 116     if (mpi->imgfmt != vf->priv->outfmt)
 117         return;                                     // colorspace differ
 118
 119     // width never changes, always try full DR
 120     mpi->priv = vf->dmpi = vf_get_image(vf->next, mpi->imgfmt, mpi->type,
 121                                         mpi->flags | MP_IMGFLAG_READABLE,
 122                                         vf->priv->outw, vf->priv->outh);
 123
 124     if ((vf->dmpi->flags & MP_IMGFLAG_DRAW_CALLBACK) &&
 125         !(vf->dmpi->flags & MP_IMGFLAG_DIRECT)) {
 126         mp_tmsg(MSGT_ASS, MSGL_INFO, "Full DR not possible, trying SLICES instead!\n");
 127         return;
 128     }
 129
 130     // set up mpi as a cropped-down image of dmpi:
 131     if (mpi->flags & MP_IMGFLAG_PLANAR) {
 132         mpi->planes[0] = vf->dmpi->planes[0] +  ass_top_margin * vf->dmpi->stride[0];
 133         mpi->planes[1] = vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1];
 134         mpi->planes[2] = vf->dmpi->planes[2] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[2];
 135         mpi->stride[1] = vf->dmpi->stride[1];
 136         mpi->stride[2] = vf->dmpi->stride[2];
 137     } else {
 138         mpi->planes[0] = vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0];
 139     }
 140     mpi->stride[0] = vf->dmpi->stride[0];
 141     mpi->width = vf->dmpi->width;
 142     mpi->flags |= MP_IMGFLAG_DIRECT;
 143     mpi->flags &= ~MP_IMGFLAG_DRAW_CALLBACK;
 144 //      vf->dmpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
 145 }
 146
 147 static void blank(mp_image_t *mpi, int y1, int y2)
 148 {
 149     int color[3] = {16, 128, 128};    // black (YUV)
 150     int y;
 151     unsigned char *dst;
 152     int chroma_rows = (y2 - y1) >> mpi->chroma_y_shift;
 153
 154     dst = mpi->planes[0] + y1 * mpi->stride[0];
 155     for (y = 0; y < y2 - y1; ++y) {
 156         memset(dst, color[0], mpi->w);
 157         dst += mpi->stride[0];
 158     }
 159     dst = mpi->planes[1] + (y1 >> mpi->chroma_y_shift) * mpi->stride[1];
 160     for (y = 0; y < chroma_rows; ++y) {
 161         memset(dst, color[1], mpi->chroma_width);
 162         dst += mpi->stride[1];
 163     }
 164     dst = mpi->planes[2] + (y1 >> mpi->chroma_y_shift) * mpi->stride[2];
 165     for (y = 0; y < chroma_rows; ++y) {
 166         memset(dst, color[2], mpi->chroma_width);
 167         dst += mpi->stride[2];
 168     }
 169 }
 170
 171 static int prepare_image(struct vf_instance *vf, mp_image_t *mpi)
 172 {
 173     if (mpi->flags & MP_IMGFLAG_DIRECT
 174         || mpi->flags & MP_IMGFLAG_DRAW_CALLBACK) {
 175         vf->dmpi = mpi->priv;
 176         if (!vf->dmpi) {
 177             mp_tmsg(MSGT_ASS, MSGL_WARN, "Why do we get NULL??\n");
 178             return 0;
 179         }
 180         mpi->priv = NULL;
 181         // we've used DR, so we're ready...
 182         if (ass_top_margin)
 183             blank(vf->dmpi, 0, ass_top_margin);
 184         if (ass_bottom_margin)
 185             blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, vf->priv->outh);
 186         if (!(mpi->flags & MP_IMGFLAG_PLANAR))
 187             vf->dmpi->planes[1] = mpi->planes[1];             // passthrough rgb8 palette
 188         return 0;
 189     }
 190
 191     // hope we'll get DR buffer:
 192     vf->dmpi = vf_get_image(vf->next, vf->priv->outfmt, MP_IMGTYPE_TEMP,
 193                             MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_READABLE,
 194                             vf->priv->outw, vf->priv->outh);
 195
 196     // copy mpi->dmpi...
 197     if (mpi->flags & MP_IMGFLAG_PLANAR) {
 198         memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
 199                    mpi->planes[0],
 200                    mpi->w,
 201                    mpi->h,
 202                    vf->dmpi->stride[0],
 203                    mpi->stride[0]);
 204         memcpy_pic(vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1],
 205                    mpi->planes[1],
 206                    mpi->w >> mpi->chroma_x_shift,
 207                    mpi->h >> mpi->chroma_y_shift,
 208                    vf->dmpi->stride[1],
 209                    mpi->stride[1]);
 210         memcpy_pic(vf->dmpi->planes[2] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[2],
 211                    mpi->planes[2],
 212                    mpi->w >> mpi->chroma_x_shift,
 213                    mpi->h >> mpi->chroma_y_shift,
 214                    vf->dmpi->stride[2],
 215                    mpi->stride[2]);
 216     } else {
 217         memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
 218                    mpi->planes[0],
 219                    mpi->w * (vf->dmpi->bpp / 8),
 220                    mpi->h,
 221                    vf->dmpi->stride[0],
 222                    mpi->stride[0]);
 223         vf->dmpi->planes[1] = mpi->planes[1];   // passthrough rgb8 palette
 224     }
 225     if (ass_top_margin)
 226         blank(vf->dmpi, 0, ass_top_margin);
 227     if (ass_bottom_margin)
 228         blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, vf->priv->outh);
 229     return 0;
 230 }
 231
 232 static void update_limits(struct vf_instance *vf, int starty, int endy,
 233                           int startx, int endx)
 234 {
 235     starty >>= 1;
 236     endy = (endy + 1) >> 1;
 237     startx >>= 1;
 238     endx = (endx + 1) >> 1;
 239     for (int i = starty; i < endy; i++) {
 240         struct line_limits *ll = vf->priv->line_limits + i;
 241         if (startx < ll->start)
 242             ll->start = startx;
 243         if (endx > ll->end)
 244             ll->end = endx;
 245     }
 246 }
 247
 248 /**
 249  * \brief Copy specified rows from render_context.dmpi to render_context.planes, upsampling to 4:4:4
 250  */
 251 static void copy_from_image(struct vf_instance *vf)
 252 {
 253     int pl;
 254
 255     for (pl = 1; pl < 3; ++pl) {
 256         int dst_stride = vf->priv->outw;
 257         int src_stride = vf->dmpi->stride[pl];
 258
 259         unsigned char *src = vf->dmpi->planes[pl];
 260         unsigned char *dst = vf->priv->planes[pl];
 261         for (int i = 0; i < (vf->priv->outh + 1) / 2; i++) {
 262             struct line_limits *ll = vf->priv->line_limits + i;
 263             unsigned char *dst_next = dst + dst_stride;
 264             for (int j = ll->start; j < ll->end; j++) {
 265                 unsigned char val = src[j];
 266                 dst[j << 1] = val;
 267                 dst[(j << 1) + 1] = val;
 268                 dst_next[j << 1] = val;
 269                 dst_next[(j << 1) + 1] = val;
 270             }
 271             src += src_stride;
 272             dst = dst_next + dst_stride;
 273         }
 274     }
 275 }
 276
 277 /**
 278  * \brief Copy all previously copied rows back to render_context.dmpi
 279  */
 280 static void copy_to_image(struct vf_instance *vf)
 281 {
 282     int pl;
 283     int i, j;
 284     for (pl = 1; pl < 3; ++pl) {
 285         int dst_stride = vf->dmpi->stride[pl];
 286         int src_stride = vf->priv->outw;
 287
 288         unsigned char *dst      = vf->dmpi->planes[pl];
 289         unsigned char *src      = vf->priv->planes[pl];
 290         unsigned char *src_next = vf->priv->planes[pl] + src_stride;
 291         for (i = 0; i < vf->dmpi->chroma_height; ++i) {
 292             for (j = vf->priv->line_limits[i].start; j < vf->priv->line_limits[i].end; j++) {
 293                 unsigned val = 0;
 294                 val += src[j << 1];
 295                 val += src[(j << 1) + 1];
 296                 val += src_next[j << 1];
 297                 val += src_next[(j << 1) + 1];
 298                 dst[j] = val >> 2;
 299             }
 300             dst += dst_stride;
 301             src      = src_next + src_stride;
 302             src_next = src + src_stride;
 303         }
 304     }
 305 }
 306
 307 static void my_draw_bitmap(struct vf_instance *vf, unsigned char *bitmap,
 308                            int bitmap_w, int bitmap_h, int stride,
 309                            int dst_x, int dst_y, unsigned color)
 310 {
 311     unsigned char y = rgba2y(color);
 312     unsigned char u = rgba2u(color);
 313     unsigned char v = rgba2v(color);
 314     unsigned char opacity = 255 - _a(color);
 315     unsigned char *src, *dsty, *dstu, *dstv;
 316     int i, j;
 317     mp_image_t *dmpi = vf->dmpi;
 318
 319     src = bitmap;
 320     dsty = dmpi->planes[0] + dst_x + dst_y * dmpi->stride[0];
 321     dstu = vf->priv->planes[1] + dst_x + dst_y * vf->priv->outw;
 322     dstv = vf->priv->planes[2] + dst_x + dst_y * vf->priv->outw;
 323     for (i = 0; i < bitmap_h; ++i) {
 324         for (j = 0; j < bitmap_w; ++j) {
 325             unsigned k = (src[j] * opacity + 255) >> 8;
 326             dsty[j] = (k * y + (255 - k) * dsty[j] + 255) >> 8;
 327             dstu[j] = (k * u + (255 - k) * dstu[j] + 255) >> 8;
 328             dstv[j] = (k * v + (255 - k) * dstv[j] + 255) >> 8;
 329         }
 330         src  += stride;
 331         dsty += dmpi->stride[0];
 332         dstu += vf->priv->outw;
 333         dstv += vf->priv->outw;
 334     }
 335 }
 336
 337 static int render_frame(struct vf_instance *vf, mp_image_t *mpi,
 338                         const ASS_Image *img)
 339 {
 340     if (img) {
 341         for (int i = 0; i < (vf->priv->outh + 1) / 2; i++)
 342             vf->priv->line_limits[i] = (struct line_limits){65535, 0};
 343         for (const ASS_Image *im = img; im; im = im->next)
 344             update_limits(vf, im->dst_y, im->dst_y + im->h,
 345                           im->dst_x, im->dst_x + im->w);
 346         copy_from_image(vf);
 347         while (img) {
 348             my_draw_bitmap(vf, img->bitmap, img->w, img->h, img->stride,
 349                            img->dst_x, img->dst_y, img->color);
 350             img = img->next;
 351         }
 352         copy_to_image(vf);
 353     }
 354     return 0;
 355 }
 356
 357 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
 358 {
 359     ASS_Image *images = 0;
 360     ASS_Renderer *renderer = vf->priv->osd->vsfilter_aspect ?
 361         vf->priv->renderer_vsfilter : vf->priv->renderer_realaspect;
 362     if (sub_visibility && renderer && vf->priv->osd->ass_track
 363         && (pts != MP_NOPTS_VALUE))
 364         images = mp_ass_render_frame(renderer,
 365                                      vf->priv->osd->ass_track,
 366                                      (pts + sub_delay) * 1000 + .5, NULL);
 367
 368     prepare_image(vf, mpi);
 369     if (images)
 370         render_frame(vf, mpi, images);
 371
 372     return vf_next_put_image(vf, vf->dmpi, pts);
 373 }
 374
 375 static int query_format(struct vf_instance *vf, unsigned int fmt)
 376 {
 377     switch (fmt) {
 378     case IMGFMT_YV12:
 379     case IMGFMT_I420:
 380     case IMGFMT_IYUV:
 381         return vf_next_query_format(vf, vf->priv->outfmt);
 382     }
 383     return 0;
 384 }
 385
 386 static int control(vf_instance_t *vf, int request, void *data)
 387 {
 388     switch (request) {
 389     case VFCTRL_SET_OSD_OBJ:
 390         vf->priv->osd = data;
 391         break;
 392     case VFCTRL_INIT_EOSD:
 393         vf->priv->renderer_realaspect = ass_renderer_init((ASS_Library *)data);
 394         if (!vf->priv->renderer_realaspect)
 395             return CONTROL_FALSE;
 396         vf->priv->renderer_vsfilter = ass_renderer_init((ASS_Library *)data);
 397         if (!vf->priv->renderer_vsfilter) {
 398             ass_renderer_done(vf->priv->renderer_realaspect);
 399             return CONTROL_FALSE;
 400         }
 401         mp_ass_configure_fonts(vf->priv->renderer_realaspect);
 402         mp_ass_configure_fonts(vf->priv->renderer_vsfilter);
 403         return CONTROL_TRUE;
 404     case VFCTRL_DRAW_EOSD:
 405         if (vf->priv->renderer_realaspect)
 406             return CONTROL_TRUE;
 407         break;
 408     }
 409     return vf_next_control(vf, request, data);
 410 }
 411
 412 static void uninit(struct vf_instance *vf)
 413 {
 414     if (vf->priv->renderer_realaspect) {
 415         ass_renderer_done(vf->priv->renderer_realaspect);
 416         ass_renderer_done(vf->priv->renderer_vsfilter);
 417     }
 418     free(vf->priv->planes[1]);
 419     free(vf->priv->planes[2]);
 420     free(vf->priv->line_limits);
 421     free(vf->priv);
 422 }
 423
 424 static const unsigned int fmt_list[] = {
 425     IMGFMT_YV12,
 426     IMGFMT_I420,
 427     IMGFMT_IYUV,
 428     0
 429 };
 430
 431 static int vf_open(vf_instance_t *vf, char *args)
 432 {
 433     int flags;
 434     vf->priv->outfmt = vf_match_csp(&vf->next, fmt_list, IMGFMT_YV12);
 435     if (vf->priv->outfmt)
 436         flags = vf_next_query_format(vf, vf->priv->outfmt);
 437     if (!vf->priv->outfmt) {
 438         uninit(vf);
 439         return 0;
 440     } else if (vf->priv->auto_insert && flags & VFCAP_EOSD) {
 441         uninit(vf);
 442         return -1;
 443     }
 444
 445     if (vf->priv->auto_insert)
 446         mp_msg(MSGT_ASS, MSGL_INFO, "[ass] auto-open\n");
 447
 448     vf->config = config;
 449     vf->query_format = query_format;
 450     vf->uninit    = uninit;
 451     vf->control   = control;
 452     vf->get_image = get_image;
 453     vf->put_image = put_image;
 454     vf->default_caps = VFCAP_EOSD;
 455     return 1;
 456 }
 457
 458 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s, f)
 459 static const m_option_t vf_opts_fields[] = {
 460     {"auto", ST_OFF(auto_insert), CONF_TYPE_FLAG, 0, 0, 1, NULL},
 461     {NULL, NULL, 0, 0, 0, 0, NULL}
 462 };
 463
 464 static const m_struct_t vf_opts = {
 465     "ass",
 466     sizeof(struct vf_priv_s),
 467     &vf_priv_dflt,
 468     vf_opts_fields
 469 };
 470
 471 const vf_info_t vf_info_ass = {
 472     "Render ASS/SSA subtitles",
 473     "ass",
 474     "Evgeniy Stepanov",
 475     "",
 476     vf_open,
 477     &vf_opts
 478 };