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mpv/libmpcodecs/vf_ass.c

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/*
* Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <assert.h>
#include <libavutil/common.h>
#include "config.h"
#include "mp_msg.h"
#include "options.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "sub/sub.h"
#include "sub/dec_sub.h"
#include "libvo/fastmemcpy.h"
#include "m_option.h"
#include "m_struct.h"
#include "sub/ass_mp.h"
#define _r(c) ((c)>>24)
#define _g(c) (((c)>>16)&0xFF)
#define _b(c) (((c)>>8)&0xFF)
#define _a(c) ((c)&0xFF)
#define rgba2y(c) ( (( 263*_r(c) + 516*_g(c) + 100*_b(c)) >> 10) + 16 )
#define rgba2u(c) ( ((-152*_r(c) - 298*_g(c) + 450*_b(c)) >> 10) + 128 )
#define rgba2v(c) ( (( 450*_r(c) - 376*_g(c) - 73*_b(c)) >> 10) + 128 )
static const struct vf_priv_s {
int outh, outw;
unsigned int outfmt;
// 1 = auto-added filter: insert only if chain does not support EOSD already
// 0 = insert always
int auto_insert;
struct osd_state *osd;
double aspect_correction;
unsigned char *planes[3];
struct line_limits {
uint16_t start;
uint16_t end;
} *line_limits;
} vf_priv_dflt;
static int config(struct vf_instance *vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
struct MPOpts *opts = vf->opts;
if (outfmt == IMGFMT_IF09)
return 0;
vf->priv->outh = height + opts->ass_top_margin + opts->ass_bottom_margin;
vf->priv->outw = width;
if (!opts->screen_size_x && !opts->screen_size_y) {
d_width = d_width * vf->priv->outw / width;
d_height = d_height * vf->priv->outh / height;
}
vf->priv->planes[1] = malloc(vf->priv->outw * vf->priv->outh);
vf->priv->planes[2] = malloc(vf->priv->outw * vf->priv->outh);
vf->priv->line_limits = malloc((vf->priv->outh + 1) / 2 * sizeof(*vf->priv->line_limits));
vf->priv->aspect_correction = (double)width / height * d_height / d_width;
return vf_next_config(vf, vf->priv->outw, vf->priv->outh, d_width,
d_height, flags, outfmt);
}
static void get_image(struct vf_instance *vf, mp_image_t *mpi)
{
if (mpi->type == MP_IMGTYPE_IPB)
return;
if (mpi->flags & MP_IMGFLAG_PRESERVE)
return;
if (mpi->imgfmt != vf->priv->outfmt)
return; // colorspace differ
// width never changes, always try full DR
mpi->priv = vf->dmpi = vf_get_image(vf->next, mpi->imgfmt, mpi->type,
mpi->flags | MP_IMGFLAG_READABLE,
FFMAX(mpi->width, vf->priv->outw),
FFMAX(mpi->height, vf->priv->outh));
if ((vf->dmpi->flags & MP_IMGFLAG_DRAW_CALLBACK) &&
!(vf->dmpi->flags & MP_IMGFLAG_DIRECT)) {
mp_tmsg(MSGT_ASS, MSGL_INFO, "Full DR not possible, trying SLICES instead!\n");
return;
}
int tmargin = vf->opts->ass_top_margin;
// set up mpi as a cropped-down image of dmpi:
if (mpi->flags & MP_IMGFLAG_PLANAR) {
mpi->planes[0] = vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0];
mpi->planes[1] = vf->dmpi->planes[1] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[1];
mpi->planes[2] = vf->dmpi->planes[2] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[2];
mpi->stride[1] = vf->dmpi->stride[1];
mpi->stride[2] = vf->dmpi->stride[2];
} else {
mpi->planes[0] = vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0];
}
mpi->stride[0] = vf->dmpi->stride[0];
mpi->width = vf->dmpi->width;
mpi->flags |= MP_IMGFLAG_DIRECT;
mpi->flags &= ~MP_IMGFLAG_DRAW_CALLBACK;
// vf->dmpi->flags&=~MP_IMGFLAG_DRAW_CALLBACK;
}
static void blank(mp_image_t *mpi, int y1, int y2)
{
int color[3] = {16, 128, 128}; // black (YUV)
int y;
unsigned char *dst;
int chroma_rows = (y2 - y1) >> mpi->chroma_y_shift;
dst = mpi->planes[0] + y1 * mpi->stride[0];
for (y = 0; y < y2 - y1; ++y) {
memset(dst, color[0], mpi->w);
dst += mpi->stride[0];
}
dst = mpi->planes[1] + (y1 >> mpi->chroma_y_shift) * mpi->stride[1];
for (y = 0; y < chroma_rows; ++y) {
memset(dst, color[1], mpi->chroma_width);
dst += mpi->stride[1];
}
dst = mpi->planes[2] + (y1 >> mpi->chroma_y_shift) * mpi->stride[2];
for (y = 0; y < chroma_rows; ++y) {
memset(dst, color[2], mpi->chroma_width);
dst += mpi->stride[2];
}
}
static int prepare_image(struct vf_instance *vf, mp_image_t *mpi)
{
struct MPOpts *opts = vf->opts;
int tmargin = opts->ass_top_margin;
if (mpi->flags & MP_IMGFLAG_DIRECT
|| mpi->flags & MP_IMGFLAG_DRAW_CALLBACK) {
vf->dmpi = mpi->priv;
if (!vf->dmpi) {
mp_tmsg(MSGT_ASS, MSGL_WARN, "Why do we get NULL??\n");
return 0;
}
mpi->priv = NULL;
// we've used DR, so we're ready...
if (tmargin)
blank(vf->dmpi, 0, tmargin);
if (opts->ass_bottom_margin)
blank(vf->dmpi, vf->priv->outh - opts->ass_bottom_margin,
vf->priv->outh);
if (!(mpi->flags & MP_IMGFLAG_PLANAR))
vf->dmpi->planes[1] = mpi->planes[1]; // passthrough rgb8 palette
return 0;
}
// hope we'll get DR buffer:
vf->dmpi = vf_get_image(vf->next, vf->priv->outfmt, MP_IMGTYPE_TEMP,
MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_READABLE,
vf->priv->outw, vf->priv->outh);
// copy mpi->dmpi...
if (mpi->flags & MP_IMGFLAG_PLANAR) {
memcpy_pic(vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0],
mpi->planes[0],
mpi->w,
mpi->h,
vf->dmpi->stride[0],
mpi->stride[0]);
memcpy_pic(vf->dmpi->planes[1] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[1],
mpi->planes[1],
mpi->w >> mpi->chroma_x_shift,
mpi->h >> mpi->chroma_y_shift,
vf->dmpi->stride[1],
mpi->stride[1]);
memcpy_pic(vf->dmpi->planes[2] + (tmargin >> mpi->chroma_y_shift) * vf->dmpi->stride[2],
mpi->planes[2],
mpi->w >> mpi->chroma_x_shift,
mpi->h >> mpi->chroma_y_shift,
vf->dmpi->stride[2],
mpi->stride[2]);
} else {
memcpy_pic(vf->dmpi->planes[0] + tmargin * vf->dmpi->stride[0],
mpi->planes[0],
mpi->w * (vf->dmpi->bpp / 8),
mpi->h,
vf->dmpi->stride[0],
mpi->stride[0]);
vf->dmpi->planes[1] = mpi->planes[1]; // passthrough rgb8 palette
}
if (tmargin)
blank(vf->dmpi, 0, tmargin);
if (opts->ass_bottom_margin)
blank(vf->dmpi, vf->priv->outh - opts->ass_bottom_margin,
vf->priv->outh);
return 0;
}
static void update_limits(struct vf_instance *vf, int starty, int endy,
int startx, int endx)
{
starty >>= 1;
endy = (endy + 1) >> 1;
startx >>= 1;
endx = (endx + 1) >> 1;
for (int i = starty; i < endy; i++) {
struct line_limits *ll = vf->priv->line_limits + i;
if (startx < ll->start)
ll->start = startx;
if (endx > ll->end)
ll->end = endx;
}
}
/**
* \brief Copy specified rows from render_context.dmpi to render_context.planes, upsampling to 4:4:4
*/
static void copy_from_image(struct vf_instance *vf)
{
int pl;
for (pl = 1; pl < 3; ++pl) {
int dst_stride = vf->priv->outw;
int src_stride = vf->dmpi->stride[pl];
unsigned char *src = vf->dmpi->planes[pl];
unsigned char *dst = vf->priv->planes[pl];
for (int i = 0; i < (vf->priv->outh + 1) / 2; i++) {
struct line_limits *ll = vf->priv->line_limits + i;
unsigned char *dst_next = dst + dst_stride;
for (int j = ll->start; j < ll->end; j++) {
unsigned char val = src[j];
dst[j << 1] = val;
dst[(j << 1) + 1] = val;
dst_next[j << 1] = val;
dst_next[(j << 1) + 1] = val;
}
src += src_stride;
dst = dst_next + dst_stride;
}
}
}
/**
* \brief Copy all previously copied rows back to render_context.dmpi
*/
static void copy_to_image(struct vf_instance *vf)
{
int pl;
int i, j;
for (pl = 1; pl < 3; ++pl) {
int dst_stride = vf->dmpi->stride[pl];
int src_stride = vf->priv->outw;
unsigned char *dst = vf->dmpi->planes[pl];
unsigned char *src = vf->priv->planes[pl];
unsigned char *src_next = vf->priv->planes[pl] + src_stride;
for (i = 0; i < vf->priv->outh / 2; ++i) {
for (j = vf->priv->line_limits[i].start; j < vf->priv->line_limits[i].end; j++) {
unsigned val = 0;
val += src[j << 1];
val += src[(j << 1) + 1];
val += src_next[j << 1];
val += src_next[(j << 1) + 1];
dst[j] = val >> 2;
}
dst += dst_stride;
src = src_next + src_stride;
src_next = src + src_stride;
}
}
}
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)
{
unsigned char y = rgba2y(color);
unsigned char u = rgba2u(color);
unsigned char v = rgba2v(color);
unsigned char opacity = 255 - _a(color);
unsigned char *src, *dsty, *dstu, *dstv;
int i, j;
mp_image_t *dmpi = vf->dmpi;
src = bitmap;
dsty = dmpi->planes[0] + dst_x + dst_y * dmpi->stride[0];
dstu = vf->priv->planes[1] + dst_x + dst_y * vf->priv->outw;
dstv = vf->priv->planes[2] + dst_x + dst_y * vf->priv->outw;
for (i = 0; i < bitmap_h; ++i) {
for (j = 0; j < bitmap_w; ++j) {
unsigned k = (src[j] * opacity + 255) >> 8;
dsty[j] = (k * y + (255 - k) * dsty[j] + 255) >> 8;
dstu[j] = (k * u + (255 - k) * dstu[j] + 255) >> 8;
dstv[j] = (k * v + (255 - k) * dstv[j] + 255) >> 8;
}
src += stride;
dsty += dmpi->stride[0];
dstu += vf->priv->outw;
dstv += vf->priv->outw;
}
}
static int render_frame(struct vf_instance *vf, mp_image_t *mpi,
const ASS_Image *img)
{
if (img) {
for (int i = 0; i < (vf->priv->outh + 1) / 2; i++)
vf->priv->line_limits[i] = (struct line_limits){65535, 0};
for (const ASS_Image *im = img; im; im = im->next)
update_limits(vf, im->dst_y, im->dst_y + im->h,
im->dst_x, im->dst_x + im->w);
copy_from_image(vf);
while (img) {
my_draw_bitmap(vf, img->bitmap, img->w, img->h, img->stride,
img->dst_x, img->dst_y, img->color);
img = img->next;
}
copy_to_image(vf);
}
return 0;
}
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
{
struct vf_priv_s *priv = vf->priv;
struct MPOpts *opts = vf->opts;
struct osd_state *osd = priv->osd;
struct sub_bitmaps imgs = (struct sub_bitmaps) {0};
if (pts != MP_NOPTS_VALUE) {
struct sub_render_params subparams = {
.pts = pts,
.dim = { .w = vf->priv->outw,
.h = vf->priv->outh,
.mt = opts->ass_top_margin,
.mb = opts->ass_bottom_margin },
.normal_scale = vf->priv->aspect_correction,
.vsfilter_scale = 1,
};
bool formats[SUBBITMAP_COUNT] = {[SUBBITMAP_LIBASS] = true};
osd_draw_sub(osd, &imgs, &subparams, formats);
}
prepare_image(vf, mpi);
render_frame(vf, mpi, imgs.imgs);
return vf_next_put_image(vf, vf->dmpi, pts);
}
static int query_format(struct vf_instance *vf, unsigned int fmt)
{
switch (fmt) {
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
return vf_next_query_format(vf, vf->priv->outfmt);
}
return 0;
}
static int control(vf_instance_t *vf, int request, void *data)
{
switch (request) {
case VFCTRL_SET_OSD_OBJ:
vf->priv->osd = data;
break;
case VFCTRL_INIT_OSD:
return CONTROL_TRUE;
}
return vf_next_control(vf, request, data);
}
static void uninit(struct vf_instance *vf)
{
free(vf->priv->planes[1]);
free(vf->priv->planes[2]);
free(vf->priv->line_limits);
free(vf->priv);
}
static const unsigned int fmt_list[] = {
IMGFMT_YV12,
IMGFMT_I420,
IMGFMT_IYUV,
0
};
static int vf_open(vf_instance_t *vf, char *args)
{
int flags;
vf->priv->outfmt = vf_match_csp(&vf->next, fmt_list, IMGFMT_YV12);
if (vf->priv->outfmt)
flags = vf_next_query_format(vf, vf->priv->outfmt);
if (!vf->priv->outfmt) {
uninit(vf);
return 0;
} else if (vf->priv->auto_insert && flags & VFCAP_EOSD) {
uninit(vf);
return -1;
}
if (vf->priv->auto_insert)
mp_msg(MSGT_ASS, MSGL_INFO, "[ass] auto-open\n");
vf->config = config;
vf->query_format = query_format;
vf->uninit = uninit;
vf->control = control;
vf->get_image = get_image;
vf->put_image = put_image;
vf->default_caps = VFCAP_EOSD | VFCAP_EOSD_FILTER;
return 1;
}
#define ST_OFF(f) M_ST_OFF(struct vf_priv_s, f)
static const m_option_t vf_opts_fields[] = {
{"auto", ST_OFF(auto_insert), CONF_TYPE_FLAG, 0, 0, 1, NULL},
{NULL, NULL, 0, 0, 0, 0, NULL}
};
static const m_struct_t vf_opts = {
"ass",
sizeof(struct vf_priv_s),
&vf_priv_dflt,
vf_opts_fields
};
const vf_info_t vf_info_ass = {
"Render ASS/SSA subtitles",
"ass",
"Evgeniy Stepanov",
"",
vf_open,
&vf_opts
};
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