libmpcodecs/vf_ass.c

   1 // -*- c-basic-offset: 8; indent-tabs-mode: t -*-
   2 // vim:ts=8:sw=8:noet:ai:
   3 /*
   4  * Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include "config.h"
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <inttypes.h>
  29 #include <assert.h>
  30
  31 #include "config.h"
  32 #include "mp_msg.h"
  33 #include "options.h"
  34
  35 #include "img_format.h"
  36 #include "mp_image.h"
  37 #include "vf.h"
  38
  39 #include "libvo/fastmemcpy.h"
  40
  41 #include "m_option.h"
  42 #include "m_struct.h"
  43
  44 #include "ass_mp.h"
  45
  46 #define _r(c)  ((c)>>24)
  47 #define _g(c)  (((c)>>16)&0xFF)
  48 #define _b(c)  (((c)>>8)&0xFF)
  49 #define _a(c)  ((c)&0xFF)
  50 #define rgba2y(c)  ( (( 263*_r(c)  + 516*_g(c) + 100*_b(c)) >> 10) + 16  )
  51 #define rgba2u(c)  ( ((-152*_r(c) - 298*_g(c) + 450*_b(c)) >> 10) + 128 )
  52 #define rgba2v(c)  ( (( 450*_r(c) - 376*_g(c) -  73*_b(c)) >> 10) + 128 )
  53
  54
  55 static const struct vf_priv_s {
  56         int outh, outw;
  57
  58         unsigned int outfmt;
  59
  60         // 1 = auto-added filter: insert only if chain does not support EOSD already
  61         // 0 = insert always
  62         int auto_insert;
  63
  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 ASS_Track *ass_track;
  74 extern float sub_delay;
  75 extern int sub_visibility;
  76
  77 static int config(struct vf_instance* vf,
  78         int width, int height, int d_width, int d_height,
  79         unsigned int flags, unsigned int outfmt)
  80 {
  81         struct MPOpts *opts = vf->opts;
  82         if (outfmt == IMGFMT_IF09) 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->ass_priv) {
  97                 ass_configure(vf->priv->ass_priv, vf->priv->outw, vf->priv->outh, 0);
  98                 ass_set_aspect_ratio(vf->priv->ass_priv, 1, 1);
  99         }
 100
 101         return vf_next_config(vf, vf->priv->outw, vf->priv->outh, d_width, 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) return;
 107         if(mpi->flags & MP_IMGFLAG_PRESERVE) return;
 108         if(mpi->imgfmt != vf->priv->outfmt) return; // colorspace differ
 109
 110         // width never changes, always try full DR
 111         mpi->priv = vf->dmpi = vf_get_image(vf->next, mpi->imgfmt,
 112                         mpi->type, mpi->flags | MP_IMGFLAG_READABLE,
 113                         vf->priv->outw,
 114                         vf->priv->outh);
 115
 116         if((vf->dmpi->flags & MP_IMGFLAG_DRAW_CALLBACK) &&
 117                         !(vf->dmpi->flags & MP_IMGFLAG_DIRECT)){
 118                 mp_tmsg(MSGT_ASS, MSGL_INFO, "Full DR not possible, trying SLICES instead!\n");
 119                 return;
 120         }
 121
 122         // set up mpi as a cropped-down image of dmpi:
 123         if(mpi->flags&MP_IMGFLAG_PLANAR){
 124                 mpi->planes[0]=vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0];
 125                 mpi->planes[1]=vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1];
 126                 mpi->planes[2]=vf->dmpi->planes[2] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[2];
 127                 mpi->stride[1]=vf->dmpi->stride[1];
 128                 mpi->stride[2]=vf->dmpi->stride[2];
 129         } else {
 130                 mpi->planes[0]=vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0];
 131         }
 132         mpi->stride[0]=vf->dmpi->stride[0];
 133         mpi->width=vf->dmpi->width;
 134         mpi->flags|=MP_IMGFLAG_DIRECT;
 135         mpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
 136 //      vf->dmpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
 137 }
 138
 139 static void blank(mp_image_t *mpi, int y1, int y2)
 140 {
 141         int color[3] = {16, 128, 128}; // black (YUV)
 142         int y;
 143         unsigned char* dst;
 144         int chroma_rows = (y2 - y1) >> mpi->chroma_y_shift;
 145
 146         dst = mpi->planes[0] + y1 * mpi->stride[0];
 147         for (y = 0; y < y2 - y1; ++y) {
 148                 memset(dst, color[0], mpi->w);
 149                 dst += mpi->stride[0];
 150         }
 151         dst = mpi->planes[1] + (y1 >> mpi->chroma_y_shift) * mpi->stride[1];
 152         for (y = 0; y < chroma_rows ; ++y) {
 153                 memset(dst, color[1], mpi->chroma_width);
 154                 dst += mpi->stride[1];
 155         }
 156         dst = mpi->planes[2] + (y1 >> mpi->chroma_y_shift) * mpi->stride[2];
 157         for (y = 0; y < chroma_rows ; ++y) {
 158                 memset(dst, color[2], mpi->chroma_width);
 159                 dst += mpi->stride[2];
 160         }
 161 }
 162
 163 static int prepare_image(struct vf_instance* vf, mp_image_t *mpi)
 164 {
 165         if(mpi->flags&MP_IMGFLAG_DIRECT || mpi->flags&MP_IMGFLAG_DRAW_CALLBACK){
 166                 vf->dmpi = mpi->priv;
 167                 if (!vf->dmpi) { mp_tmsg(MSGT_ASS, MSGL_WARN, "Why do we get NULL??\n"); return 0; }
 168                 mpi->priv = NULL;
 169                 // we've used DR, so we're ready...
 170                 if (ass_top_margin)
 171                         blank(vf->dmpi, 0, ass_top_margin);
 172                 if (ass_bottom_margin)
 173                         blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, vf->priv->outh);
 174                 if(!(mpi->flags&MP_IMGFLAG_PLANAR))
 175                         vf->dmpi->planes[1] = mpi->planes[1]; // passthrough rgb8 palette
 176                 return 0;
 177         }
 178
 179         // hope we'll get DR buffer:
 180         vf->dmpi = vf_get_image(vf->next, vf->priv->outfmt,
 181                         MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_READABLE,
 182                         vf->priv->outw, vf->priv->outh);
 183
 184         // copy mpi->dmpi...
 185         if(mpi->flags&MP_IMGFLAG_PLANAR){
 186                 memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
 187                                 mpi->planes[0], mpi->w, mpi->h,
 188                                 vf->dmpi->stride[0], mpi->stride[0]);
 189                 memcpy_pic(vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1],
 190                                 mpi->planes[1], mpi->w >> mpi->chroma_x_shift, mpi->h >> mpi->chroma_y_shift,
 191                                 vf->dmpi->stride[1], mpi->stride[1]);
 192                 memcpy_pic(vf->dmpi->planes[2] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[2],
 193                                 mpi->planes[2], mpi->w >> mpi->chroma_x_shift, mpi->h >> mpi->chroma_y_shift,
 194                                 vf->dmpi->stride[2], mpi->stride[2]);
 195         } else {
 196                 memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
 197                                 mpi->planes[0], mpi->w*(vf->dmpi->bpp/8), mpi->h,
 198                                 vf->dmpi->stride[0], mpi->stride[0]);
 199                 vf->dmpi->planes[1] = mpi->planes[1]; // passthrough rgb8 palette
 200         }
 201         if (ass_top_margin)
 202                 blank(vf->dmpi, 0, ass_top_margin);
 203         if (ass_bottom_margin)
 204                 blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, vf->priv->outh);
 205         return 0;
 206 }
 207
 208 static void update_limits(struct vf_instance *vf, int starty, int endy,
 209                           int startx, int endx)
 210 {
 211         starty >>= 1;
 212         endy = (endy + 1) >> 1;
 213         startx >>= 1;
 214         endx = (endx + 1) >> 1;
 215         for (int i = starty; i < endy; i++) {
 216                 struct line_limits *ll = vf->priv->line_limits + i;
 217                 if (startx < ll->start)
 218                         ll->start = startx;
 219                 if (endx > ll->end)
 220                         ll->end = endx;
 221         }
 222 }
 223
 224 /**
 225  * \brief Copy specified rows from render_context.dmpi to render_context.planes, upsampling to 4:4:4
 226  */
 227 static void copy_from_image(struct vf_instance* vf)
 228 {
 229         int pl;
 230
 231         for (pl = 1; pl < 3; ++pl) {
 232                 int dst_stride = vf->priv->outw;
 233                 int src_stride = vf->dmpi->stride[pl];
 234
 235                 unsigned char* src = vf->dmpi->planes[pl];
 236                 unsigned char* dst = vf->priv->planes[pl];
 237                 for (int i = 0; i < (vf->priv->outh + 1) / 2; i++) {
 238                         struct line_limits *ll = vf->priv->line_limits + i;
 239                         unsigned char* dst_next = dst + dst_stride;
 240                         for (int j = ll->start; j < ll->end; j++) {
 241                                 unsigned char val = src[j];
 242                                 dst[j << 1] = val;
 243                                 dst[(j << 1) + 1] = val;
 244                                 dst_next[j << 1] = val;
 245                                 dst_next[(j << 1) + 1] = val;
 246                         }
 247                         src += src_stride;
 248                         dst = dst_next + dst_stride;
 249                 }
 250         }
 251 }
 252
 253 /**
 254  * \brief Copy all previously copied rows back to render_context.dmpi
 255  */
 256 static void copy_to_image(struct vf_instance* vf)
 257 {
 258         int pl;
 259         int i, j;
 260         for (pl = 1; pl < 3; ++pl) {
 261                 int dst_stride = vf->dmpi->stride[pl];
 262                 int src_stride = vf->priv->outw;
 263
 264                 unsigned char* dst = vf->dmpi->planes[pl];
 265                 unsigned char* src = vf->priv->planes[pl];
 266                 unsigned char* src_next = vf->priv->planes[pl] + src_stride;
 267                 for (i = 0; i < vf->dmpi->chroma_height; ++i) {
 268                         for (j = vf->priv->line_limits[i].start; j < vf->priv->line_limits[i].end; j++) {
 269                                 unsigned val = 0;
 270                                 val += src[j << 1];
 271                                 val += src[(j << 1) + 1];
 272                                 val += src_next[j << 1];
 273                                 val += src_next[(j << 1) + 1];
 274                                 dst[j] = val >> 2;
 275                         }
 276                         dst += dst_stride;
 277                         src = src_next + src_stride;
 278                         src_next = src + src_stride;
 279                 }
 280         }
 281 }
 282
 283 static void my_draw_bitmap(struct vf_instance* vf, unsigned char* bitmap, int bitmap_w, int bitmap_h, int stride, int dst_x, int dst_y, unsigned color)
 284 {
 285         unsigned char y = rgba2y(color);
 286         unsigned char u = rgba2u(color);
 287         unsigned char v = rgba2v(color);
 288         unsigned char opacity = 255 - _a(color);
 289         unsigned char *src, *dsty, *dstu, *dstv;
 290         int i, j;
 291         mp_image_t* dmpi = vf->dmpi;
 292
 293         src = bitmap;
 294         dsty = dmpi->planes[0] + dst_x + dst_y * dmpi->stride[0];
 295         dstu = vf->priv->planes[1] + dst_x + dst_y * vf->priv->outw;
 296         dstv = vf->priv->planes[2] + dst_x + dst_y * vf->priv->outw;
 297         for (i = 0; i < bitmap_h; ++i) {
 298                 for (j = 0; j < bitmap_w; ++j) {
 299                         unsigned k = (src[j] * opacity + 255) >> 8;
 300                         dsty[j] = (k*y + (255-k)*dsty[j] + 255) >> 8;
 301                         dstu[j] = (k*u + (255-k)*dstu[j] + 255) >> 8;
 302                         dstv[j] = (k*v + (255-k)*dstv[j] + 255) >> 8;
 303                 }
 304                 src += stride;
 305                 dsty += dmpi->stride[0];
 306                 dstu += vf->priv->outw;
 307                 dstv += vf->priv->outw;
 308         }
 309 }
 310
 311 static int render_frame(struct vf_instance* vf, mp_image_t *mpi, const ASS_Image *img)
 312 {
 313         if (img) {
 314                 for (int i = 0; i < (vf->priv->outh + 1) / 2; i++)
 315                         vf->priv->line_limits[i] = (struct line_limits){65535, 0};
 316                 for (const ASS_Image *im = img; im; im = im->next)
 317                         update_limits(vf, im->dst_y, im->dst_y + im->h, im->dst_x, im->dst_x + im->w);
 318                 copy_from_image(vf);
 319                 while (img) {
 320                         my_draw_bitmap(vf, img->bitmap, img->w, img->h, img->stride,
 321                                         img->dst_x, img->dst_y, img->color);
 322                         img = img->next;
 323                 }
 324                 copy_to_image(vf);
 325         }
 326         return 0;
 327 }
 328
 329 static int put_image(struct vf_instance* vf, mp_image_t *mpi, double pts)
 330 {
 331         ASS_Image* images = 0;
 332         if (sub_visibility && vf->priv->ass_priv && ass_track && (pts != MP_NOPTS_VALUE))
 333                 images = ass_mp_render_frame(vf->priv->ass_priv, ass_track, (pts+sub_delay) * 1000 + .5, NULL);
 334
 335         prepare_image(vf, mpi);
 336         if (images) render_frame(vf, mpi, images);
 337
 338         return vf_next_put_image(vf, vf->dmpi, pts);
 339 }
 340
 341 static int query_format(struct vf_instance* vf, unsigned int fmt)
 342 {
 343         switch(fmt){
 344         case IMGFMT_YV12:
 345         case IMGFMT_I420:
 346         case IMGFMT_IYUV:
 347                 return vf_next_query_format(vf, vf->priv->outfmt);
 348         }
 349         return 0;
 350 }
 351
 352 static int control(vf_instance_t *vf, int request, void *data)
 353 {
 354         switch (request) {
 355         case VFCTRL_INIT_EOSD:
 356                 vf->priv->ass_priv = ass_renderer_init((ASS_Library*)data);
 357                 if (!vf->priv->ass_priv) return CONTROL_FALSE;
 358                 ass_configure_fonts(vf->priv->ass_priv);
 359                 return CONTROL_TRUE;
 360         case VFCTRL_DRAW_EOSD:
 361                 if (vf->priv->ass_priv) return CONTROL_TRUE;
 362                 break;
 363         }
 364         return vf_next_control(vf, request, data);
 365 }
 366
 367 static void uninit(struct vf_instance* vf)
 368 {
 369         if (vf->priv->ass_priv)
 370                 ass_renderer_done(vf->priv->ass_priv);
 371         free(vf->priv->planes[1]);
 372         free(vf->priv->planes[2]);
 373         free(vf->priv->line_limits);
 374         free(vf->priv);
 375 }
 376
 377 static const unsigned int fmt_list[]={
 378         IMGFMT_YV12,
 379         IMGFMT_I420,
 380         IMGFMT_IYUV,
 381         0
 382 };
 383
 384 static int vf_open(vf_instance_t *vf, char *args)
 385 {
 386         int flags;
 387         vf->priv->outfmt = vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
 388         if (vf->priv->outfmt)
 389                 flags = vf_next_query_format(vf, vf->priv->outfmt);
 390         if (!vf->priv->outfmt) {
 391                 uninit(vf);
 392                 return 0;
 393         } else if (vf->priv->auto_insert && flags&VFCAP_EOSD) {
 394                 uninit(vf);
 395                 return -1;
 396         }
 397
 398         if (vf->priv->auto_insert)
 399                 mp_msg(MSGT_ASS, MSGL_INFO, "[ass] auto-open\n");
 400
 401         vf->config = config;
 402         vf->query_format = query_format;
 403         vf->uninit = uninit;
 404         vf->control = control;
 405         vf->get_image = get_image;
 406         vf->put_image = put_image;
 407         vf->default_caps=VFCAP_EOSD;
 408         return 1;
 409 }
 410
 411 #define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
 412 static const m_option_t vf_opts_fields[] = {
 413         {"auto", ST_OFF(auto_insert), CONF_TYPE_FLAG, 0 , 0, 1, NULL},
 414         { NULL, NULL, 0, 0, 0, 0,  NULL }
 415 };
 416
 417 static const m_struct_t vf_opts = {
 418         "ass",
 419         sizeof(struct vf_priv_s),
 420         &vf_priv_dflt,
 421         vf_opts_fields
 422 };
 423
 424 const vf_info_t vf_info_ass = {
 425         "Render ASS/SSA subtitles",
 426         "ass",
 427         "Evgeniy Stepanov",
 428         "",
 429         vf_open,
 430         &vf_opts
 431 };