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 "libvo/sub.h"
  37
  38 #include "libvo/fastmemcpy.h"
  39
  40 #include "m_option.h"
  41 #include "m_struct.h"
  42
  43 #include "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 *ass_priv;
  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 extern float sub_delay;
  74
  75 static int config(struct vf_instance *vf,
  76                   int width, int height, int d_width, int d_height,
  77                   unsigned int flags, unsigned int outfmt)
  78 {
  79     struct MPOpts *opts = vf->opts;
  80     if (outfmt == IMGFMT_IF09)
  81         return 0;
  82
  83     vf->priv->outh = height + ass_top_margin + ass_bottom_margin;
  84     vf->priv->outw = width;
  85
  86     if (!opts->screen_size_x && !opts->screen_size_y) {
  87         d_width = d_width * vf->priv->outw / width;
  88         d_height = d_height * vf->priv->outh / height;
  89     }
  90
  91     vf->priv->planes[1]   = malloc(vf->priv->outw * vf->priv->outh);
  92     vf->priv->planes[2]   = malloc(vf->priv->outw * vf->priv->outh);
  93     vf->priv->line_limits = malloc((vf->priv->outh + 1) / 2 * sizeof(*vf->priv->line_limits));
  94
  95     if (vf->priv->ass_priv) {
  96         ass_configure(vf->priv->ass_priv, vf->priv->outw, vf->priv->outh, 0);
  97         ass_set_aspect_ratio(vf->priv->ass_priv, 1, 1);
  98     }
  99
 100     return vf_next_config(vf, vf->priv->outw, vf->priv->outh, d_width,
 101                           d_height, flags, outfmt);
 102 }
 103
 104 static void get_image(struct vf_instance *vf, mp_image_t *mpi)
 105 {
 106     if (mpi->type == MP_IMGTYPE_IPB)
 107         return;
 108     if (mpi->flags & MP_IMGFLAG_PRESERVE)
 109         return;
 110     if (mpi->imgfmt != vf->priv->outfmt)
 111         return;                                     // colorspace differ
 112
 113     // width never changes, always try full DR
 114     mpi->priv = vf->dmpi = vf_get_image(vf->next, mpi->imgfmt, mpi->type,
 115                                         mpi->flags | MP_IMGFLAG_READABLE,
 116                                         vf->priv->outw, vf->priv->outh);
 117
 118     if ((vf->dmpi->flags & MP_IMGFLAG_DRAW_CALLBACK) &&
 119         !(vf->dmpi->flags & MP_IMGFLAG_DIRECT)) {
 120         mp_tmsg(MSGT_ASS, MSGL_INFO, "Full DR not possible, trying SLICES instead!\n");
 121         return;
 122     }
 123
 124     // set up mpi as a cropped-down image of dmpi:
 125     if (mpi->flags & MP_IMGFLAG_PLANAR) {
 126         mpi->planes[0] = vf->dmpi->planes[0] +  ass_top_margin * vf->dmpi->stride[0];
 127         mpi->planes[1] = vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1];
 128         mpi->planes[2] = vf->dmpi->planes[2] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[2];
 129         mpi->stride[1] = vf->dmpi->stride[1];
 130         mpi->stride[2] = vf->dmpi->stride[2];
 131     } else {
 132         mpi->planes[0] = vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0];
 133     }
 134     mpi->stride[0] = vf->dmpi->stride[0];
 135     mpi->width = vf->dmpi->width;
 136     mpi->flags |= MP_IMGFLAG_DIRECT;
 137     mpi->flags &= ~MP_IMGFLAG_DRAW_CALLBACK;
 138 //      vf->dmpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
 139 }
 140
 141 static void blank(mp_image_t *mpi, int y1, int y2)
 142 {
 143     int color[3] = {16, 128, 128};    // black (YUV)
 144     int y;
 145     unsigned char *dst;
 146     int chroma_rows = (y2 - y1) >> mpi->chroma_y_shift;
 147
 148     dst = mpi->planes[0] + y1 * mpi->stride[0];
 149     for (y = 0; y < y2 - y1; ++y) {
 150         memset(dst, color[0], mpi->w);
 151         dst += mpi->stride[0];
 152     }
 153     dst = mpi->planes[1] + (y1 >> mpi->chroma_y_shift) * mpi->stride[1];
 154     for (y = 0; y < chroma_rows; ++y) {
 155         memset(dst, color[1], mpi->chroma_width);
 156         dst += mpi->stride[1];
 157     }
 158     dst = mpi->planes[2] + (y1 >> mpi->chroma_y_shift) * mpi->stride[2];
 159     for (y = 0; y < chroma_rows; ++y) {
 160         memset(dst, color[2], mpi->chroma_width);
 161         dst += mpi->stride[2];
 162     }
 163 }
 164
 165 static int prepare_image(struct vf_instance *vf, mp_image_t *mpi)
 166 {
 167     if (mpi->flags & MP_IMGFLAG_DIRECT
 168         || mpi->flags & MP_IMGFLAG_DRAW_CALLBACK) {
 169         vf->dmpi = mpi->priv;
 170         if (!vf->dmpi) {
 171             mp_tmsg(MSGT_ASS, MSGL_WARN, "Why do we get NULL??\n");
 172             return 0;
 173         }
 174         mpi->priv = NULL;
 175         // we've used DR, so we're ready...
 176         if (ass_top_margin)
 177             blank(vf->dmpi, 0, ass_top_margin);
 178         if (ass_bottom_margin)
 179             blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, vf->priv->outh);
 180         if (!(mpi->flags & MP_IMGFLAG_PLANAR))
 181             vf->dmpi->planes[1] = mpi->planes[1];             // passthrough rgb8 palette
 182         return 0;
 183     }
 184
 185     // hope we'll get DR buffer:
 186     vf->dmpi = vf_get_image(vf->next, vf->priv->outfmt, MP_IMGTYPE_TEMP,
 187                             MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_READABLE,
 188                             vf->priv->outw, vf->priv->outh);
 189
 190     // copy mpi->dmpi...
 191     if (mpi->flags & MP_IMGFLAG_PLANAR) {
 192         memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
 193                    mpi->planes[0],
 194                    mpi->w,
 195                    mpi->h,
 196                    vf->dmpi->stride[0],
 197                    mpi->stride[0]);
 198         memcpy_pic(vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1],
 199                    mpi->planes[1],
 200                    mpi->w >> mpi->chroma_x_shift,
 201                    mpi->h >> mpi->chroma_y_shift,
 202                    vf->dmpi->stride[1],
 203                    mpi->stride[1]);
 204         memcpy_pic(vf->dmpi->planes[2] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[2],
 205                    mpi->planes[2],
 206                    mpi->w >> mpi->chroma_x_shift,
 207                    mpi->h >> mpi->chroma_y_shift,
 208                    vf->dmpi->stride[2],
 209                    mpi->stride[2]);
 210     } else {
 211         memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
 212                    mpi->planes[0],
 213                    mpi->w * (vf->dmpi->bpp / 8),
 214                    mpi->h,
 215                    vf->dmpi->stride[0],
 216                    mpi->stride[0]);
 217         vf->dmpi->planes[1] = mpi->planes[1];   // passthrough rgb8 palette
 218     }
 219     if (ass_top_margin)
 220         blank(vf->dmpi, 0, ass_top_margin);
 221     if (ass_bottom_margin)
 222         blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, 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     ASS_Image *images = 0;
 354     if (sub_visibility && vf->priv->ass_priv && vf->priv->osd->ass_track
 355         && (pts != MP_NOPTS_VALUE))
 356         images = ass_mp_render_frame(vf->priv->ass_priv,
 357                                      vf->priv->osd->ass_track,
 358                                      (pts + sub_delay) * 1000 + .5, NULL);
 359
 360     prepare_image(vf, mpi);
 361     if (images)
 362         render_frame(vf, mpi, images);
 363
 364     return vf_next_put_image(vf, vf->dmpi, pts);
 365 }
 366
 367 static int query_format(struct vf_instance *vf, unsigned int fmt)
 368 {
 369     switch (fmt) {
 370     case IMGFMT_YV12:
 371     case IMGFMT_I420:
 372     case IMGFMT_IYUV:
 373         return vf_next_query_format(vf, vf->priv->outfmt);
 374     }
 375     return 0;
 376 }
 377
 378 static int control(vf_instance_t *vf, int request, void *data)
 379 {
 380     switch (request) {
 381     case VFCTRL_SET_OSD_OBJ:
 382         vf->priv->osd = data;
 383         break;
 384     case VFCTRL_INIT_EOSD:
 385         vf->priv->ass_priv = ass_renderer_init((ASS_Library *)data);
 386         if (!vf->priv->ass_priv)
 387             return CONTROL_FALSE;
 388         ass_configure_fonts(vf->priv->ass_priv);
 389         return CONTROL_TRUE;
 390     case VFCTRL_DRAW_EOSD:
 391         if (vf->priv->ass_priv)
 392             return CONTROL_TRUE;
 393         break;
 394     }
 395     return vf_next_control(vf, request, data);
 396 }
 397
 398 static void uninit(struct vf_instance *vf)
 399 {
 400     if (vf->priv->ass_priv)
 401         ass_renderer_done(vf->priv->ass_priv);
 402     free(vf->priv->planes[1]);
 403     free(vf->priv->planes[2]);
 404     free(vf->priv->line_limits);
 405     free(vf->priv);
 406 }
 407
 408 static const unsigned int fmt_list[] = {
 409     IMGFMT_YV12,
 410     IMGFMT_I420,
 411     IMGFMT_IYUV,
 412     0
 413 };
 414
 415 static int vf_open(vf_instance_t *vf, char *args)
 416 {
 417     int flags;
 418     vf->priv->outfmt = vf_match_csp(&vf->next, fmt_list, IMGFMT_YV12);
 419     if (vf->priv->outfmt)
 420         flags = vf_next_query_format(vf, vf->priv->outfmt);
 421     if (!vf->priv->outfmt) {
 422         uninit(vf);
 423         return 0;
 424     } else if (vf->priv->auto_insert && flags & VFCAP_EOSD) {
 425         uninit(vf);
 426         return -1;
 427     }
 428
 429     if (vf->priv->auto_insert)
 430         mp_msg(MSGT_ASS, MSGL_INFO, "[ass] auto-open\n");
 431
 432     vf->config = config;
 433     vf->query_format = query_format;
 434     vf->uninit    = uninit;
 435     vf->control   = control;
 436     vf->get_image = get_image;
 437     vf->put_image = put_image;
 438     vf->default_caps = VFCAP_EOSD;
 439     return 1;
 440 }
 441
 442 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s, f)
 443 static const m_option_t vf_opts_fields[] = {
 444     {"auto", ST_OFF(auto_insert), CONF_TYPE_FLAG, 0, 0, 1, NULL},
 445     {NULL, NULL, 0, 0, 0, 0, NULL}
 446 };
 447
 448 static const m_struct_t vf_opts = {
 449     "ass",
 450     sizeof(struct vf_priv_s),
 451     &vf_priv_dflt,
 452     vf_opts_fields
 453 };
 454
 455 const vf_info_t vf_info_ass = {
 456     "Render ASS/SSA subtitles",
 457     "ass",
 458     "Evgeniy Stepanov",
 459     "",
 460     vf_open,
 461     &vf_opts
 462 };