forked from mia/Aegisub
258 lines
6.4 KiB
C
258 lines
6.4 KiB
C
/*****************************************************************************
|
|
* csri: common subtitle renderer interface
|
|
*****************************************************************************
|
|
* Copyright (C) 2007 David Lamparter
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
****************************************************************************/
|
|
|
|
/** libass csri wrapper.
|
|
* Indirectly based on code from aegisub,
|
|
* (c) 2006-2007, Rodrigo Braz Monteiro, Evgeniy Stepanov
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "acconf.h"
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include <ass/ass.h>
|
|
|
|
#ifdef _WIN32
|
|
# define CSRIAPI __declspec(dllexport)
|
|
#else
|
|
# ifdef HAVE_GCC_VISIBILITY
|
|
# define CSRIAPI __attribute__((visibility ("default")))
|
|
# else
|
|
# define CSRIAPI
|
|
# endif
|
|
#endif
|
|
|
|
#define CSRI_OWN_HANDLES
|
|
typedef struct csri_libass_rend {
|
|
ass_library_t* ass_library;
|
|
} csri_rend;
|
|
|
|
typedef struct csri_asa_inst {
|
|
ass_renderer_t* ass_renderer;
|
|
ass_track_t* ass_track;
|
|
} csri_inst;
|
|
|
|
#include <csri/csri.h>
|
|
#include <csri/stream.h>
|
|
#include <subhelp.h>
|
|
|
|
static struct csri_libass_rend csri_libass = { NULL };
|
|
|
|
csri_inst *csri_open_file(csri_rend *renderer,
|
|
const char *filename, struct csri_openflag *flags)
|
|
{
|
|
return subhelp_open_file(renderer, csri_open_mem, filename, flags);
|
|
}
|
|
|
|
csri_inst *csri_open_mem(csri_rend *renderer,
|
|
const void *data, size_t length, struct csri_openflag *flags)
|
|
{
|
|
csri_inst *rv;
|
|
if (renderer != &csri_libass)
|
|
return NULL;
|
|
|
|
rv = (csri_inst *)malloc(sizeof(csri_inst));
|
|
if (!rv)
|
|
return NULL;
|
|
|
|
rv->ass_renderer = ass_renderer_init(renderer->ass_library);
|
|
if (!rv->ass_renderer) {
|
|
free(rv);
|
|
return NULL;
|
|
}
|
|
ass_set_font_scale(rv->ass_renderer, 1.);
|
|
ass_set_fonts(rv->ass_renderer, NULL, "Sans");
|
|
rv->ass_track = ass_read_memory(csri_libass.ass_library,
|
|
(void *)data, length, "UTF-8");
|
|
if (!rv->ass_track) {
|
|
ass_renderer_done(rv->ass_renderer);
|
|
free(rv);
|
|
return NULL;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
void csri_close(csri_inst *inst)
|
|
{
|
|
ass_free_track(inst->ass_track);
|
|
ass_renderer_done(inst->ass_renderer);
|
|
free(inst);
|
|
}
|
|
|
|
int csri_request_fmt(csri_inst *inst, const struct csri_fmt *fmt)
|
|
{
|
|
if (!csri_is_rgb(fmt->pixfmt) || csri_has_alpha(fmt->pixfmt))
|
|
return -1;
|
|
ass_set_frame_size(inst->ass_renderer, fmt->width, fmt->height);
|
|
return 0;
|
|
}
|
|
|
|
void csri_render(csri_inst *inst, struct csri_frame *frame, double time)
|
|
{
|
|
ass_image_t *img = ass_render_frame(inst->ass_renderer,
|
|
inst->ass_track, (int)(time * 1000), NULL);
|
|
|
|
while (img) {
|
|
unsigned bpp, alpha = 256 - (img->color && 0xFF);
|
|
int src_d, dst_d;
|
|
unsigned char *src, *dst, *endy, *endx;
|
|
unsigned char c[3] = {
|
|
(img->color >> 8) & 0xFF, /* B */
|
|
(img->color >> 16) & 0xFF, /* G */
|
|
img->color >> 24 /* R */
|
|
};
|
|
if ((frame->pixfmt | 1) == CSRI_F__RGB
|
|
|| frame->pixfmt == CSRI_F_RGB) {
|
|
unsigned char tmp = c[2];
|
|
c[2] = c[0];
|
|
c[0] = tmp;
|
|
}
|
|
bpp = frame->pixfmt >= 0x200 ? 3 : 4;
|
|
|
|
dst = frame->planes[0]
|
|
+ img->dst_y * frame->strides[0]
|
|
+ img->dst_x * bpp;
|
|
if (frame->pixfmt & 1)
|
|
dst++;
|
|
src = img->bitmap;
|
|
|
|
src_d = img->stride - img->w;
|
|
dst_d = frame->strides[0] - img->w * bpp;
|
|
endy = src + img->h * img->stride;
|
|
|
|
while (src != endy) {
|
|
endx = src + img->w;
|
|
while (src != endx) {
|
|
/* src[x]: 0..255, alpha: 1..256 (see above)
|
|
* -> src[x]*alpha: 0<<8..255<<8
|
|
* -> need 1..256 for mult => +1
|
|
*/
|
|
unsigned s = ((*src++ * alpha) >> 8) + 1;
|
|
unsigned d = 257 - s;
|
|
/* c[0]: 0.255, s/d: 1..256 */
|
|
dst[0] = (s*c[0] + d*dst[0]) >> 8;
|
|
dst[1] = (s*c[1] + d*dst[1]) >> 8;
|
|
dst[2] = (s*c[2] + d*dst[2]) >> 8;
|
|
dst += bpp;
|
|
}
|
|
dst += dst_d;
|
|
src += src_d;
|
|
}
|
|
img = img->next;
|
|
}
|
|
}
|
|
|
|
static csri_inst *libass_init_stream(csri_rend *renderer,
|
|
const void *header, size_t headerlen,
|
|
struct csri_openflag *flags)
|
|
{
|
|
csri_inst *rv;
|
|
|
|
if (renderer != &csri_libass)
|
|
return NULL;
|
|
|
|
rv = (csri_inst *)malloc(sizeof(csri_inst));
|
|
if (!rv)
|
|
return NULL;
|
|
|
|
rv->ass_renderer = ass_renderer_init(renderer->ass_library);
|
|
if (!rv->ass_renderer) {
|
|
free(rv);
|
|
return NULL;
|
|
}
|
|
ass_set_font_scale(rv->ass_renderer, 1.);
|
|
ass_set_fonts(rv->ass_renderer, NULL, "Sans");
|
|
rv->ass_track = ass_new_track(csri_libass.ass_library);
|
|
if (!rv->ass_track) {
|
|
ass_renderer_done(rv->ass_renderer);
|
|
free(rv);
|
|
return NULL;
|
|
}
|
|
ass_process_codec_private(rv->ass_track, (void *)header, headerlen);
|
|
return rv;
|
|
}
|
|
|
|
static void libass_push_packet(csri_inst *inst,
|
|
const void *packet, size_t packetlen,
|
|
double pts_start, double pts_end)
|
|
{
|
|
ass_process_chunk(inst->ass_track, (void *)packet, packetlen,
|
|
(int)(pts_start * 1000), (int)((pts_end - pts_start) * 1000));
|
|
}
|
|
|
|
static struct csri_stream_ext streamext = {
|
|
libass_init_stream,
|
|
libass_push_packet,
|
|
NULL
|
|
};
|
|
|
|
void *csri_query_ext(csri_rend *rend, csri_ext_id extname)
|
|
{
|
|
if (!rend)
|
|
return NULL;
|
|
if (!strcmp(extname, CSRI_EXT_STREAM_ASS))
|
|
return &streamext;
|
|
return NULL;
|
|
}
|
|
|
|
static struct csri_info csri_libass_info = {
|
|
"libass",
|
|
"0.9.x",
|
|
"libass (the MPlayer SSA/ASS renderer, 0.9.x API)",
|
|
"Evgeniy Stepanov",
|
|
"Copyright (c) 2006, 2007 by Evgeniy Stepanov"
|
|
};
|
|
|
|
struct csri_info *csri_renderer_info(csri_rend *rend)
|
|
{
|
|
return &csri_libass_info;
|
|
}
|
|
|
|
csri_rend *csri_renderer_byname(const char *name,
|
|
const char *specific)
|
|
{
|
|
if (strcmp(name, csri_libass_info.name))
|
|
return NULL;
|
|
if (specific && strcmp(specific, csri_libass_info.specific))
|
|
return NULL;
|
|
return &csri_libass;
|
|
}
|
|
|
|
csri_rend *csri_renderer_default()
|
|
{
|
|
csri_libass.ass_library = ass_library_init();
|
|
if (!csri_libass.ass_library)
|
|
return NULL;
|
|
|
|
ass_set_fonts_dir(csri_libass.ass_library, "");
|
|
ass_set_extract_fonts(csri_libass.ass_library, 0);
|
|
ass_set_style_overrides(csri_libass.ass_library, NULL);
|
|
return &csri_libass;
|
|
}
|
|
|
|
csri_rend *csri_renderer_next(csri_rend *prev)
|
|
{
|
|
return NULL;
|
|
}
|
|
|