mpv/libmpcodecs/vf_ass.c

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// -*- c-basic-offset: 8; indent-tabs-mode: t -*-
// vim:ts=8:sw=8:noet:ai:
/*
Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
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
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <assert.h>
#include "config.h"
#include "mp_msg.h"
#include "help_mp.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"
#include "m_option.h"
#include "m_struct.h"
#include "libass/ass.h"
#include "libass/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 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;
ass_renderer_t* ass_priv;
unsigned char* planes[3];
unsigned char* dirty_rows;
} vf_priv_dflt;
extern int opt_screen_size_x;
extern int opt_screen_size_y;
extern ass_track_t* ass_track;
extern float sub_delay;
extern int sub_visibility;
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
if (outfmt == IMGFMT_IF09) return 0;
vf->priv->outh = height + ass_top_margin + ass_bottom_margin;
vf->priv->outw = width;
if(!opt_screen_size_x && !opt_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->dirty_rows = malloc(vf->priv->outh);
if (vf->priv->ass_priv) {
ass_configure(vf->priv->ass_priv, vf->priv->outw, vf->priv->outh);
ass_set_aspect_ratio(vf->priv->ass_priv, ((double)d_width) / d_height);
}
return vf_next_config(vf, vf->priv->outw, vf->priv->outh, d_width, d_height, flags, outfmt);
}
static void get_image(struct vf_instance_s* 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,
vf->priv->outw,
vf->priv->outh);
if((vf->dmpi->flags & MP_IMGFLAG_DRAW_CALLBACK) &&
!(vf->dmpi->flags & MP_IMGFLAG_DIRECT)){
mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_MPCODECS_FullDRNotPossible);
return;
}
// set up mpi as a cropped-down image of dmpi:
if(mpi->flags&MP_IMGFLAG_PLANAR){
mpi->planes[0]=vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0];
mpi->planes[1]=vf->dmpi->planes[1] + (ass_top_margin >> mpi->chroma_y_shift) * vf->dmpi->stride[1];
mpi->planes[2]=vf->dmpi->planes[2] + (ass_top_margin >> 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] + ass_top_margin * 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_s* vf, mp_image_t *mpi)
{
if(mpi->flags&MP_IMGFLAG_DIRECT || mpi->flags&MP_IMGFLAG_DRAW_CALLBACK){
vf->dmpi = mpi->priv;
if (!vf->dmpi) { mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_MPCODECS_FunWhydowegetNULL); return 0; }
mpi->priv = NULL;
// we've used DR, so we're ready...
if (ass_top_margin)
blank(vf->dmpi, 0, ass_top_margin);
if (ass_bottom_margin)
blank(vf->dmpi, vf->priv->outh - 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,
vf->priv->outw, vf->priv->outh);
// copy mpi->dmpi...
if(mpi->flags&MP_IMGFLAG_PLANAR){
memcpy_pic(vf->dmpi->planes[0] + ass_top_margin * vf->dmpi->stride[0],
mpi->planes[0], mpi->w, mpi->h,
vf->dmpi->stride[0], mpi->stride[0]);
memcpy_pic(vf->dmpi->planes[1] + (ass_top_margin >> 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] + (ass_top_margin >> 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] + ass_top_margin * 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 (ass_top_margin)
blank(vf->dmpi, 0, ass_top_margin);
if (ass_bottom_margin)
blank(vf->dmpi, vf->priv->outh - ass_bottom_margin, vf->priv->outh);
return 0;
}
/**
* \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_s* vf, int first_row, int last_row)
{
int pl;
int i, j, k;
unsigned char val;
int chroma_rows;
first_row -= (first_row % 2);
last_row += (last_row % 2);
chroma_rows = (last_row - first_row) / 2;
for (pl = 1; pl < 3; ++pl) {
int dst_stride = vf->dmpi->stride[pl] * 2;
int src_stride = vf->dmpi->stride[pl];
unsigned char* src = vf->dmpi->planes[pl] + (first_row/2) * src_stride;
unsigned char* dst = vf->priv->planes[pl] + first_row * dst_stride;
unsigned char* dst_next = dst + dst_stride;
for(i = 0; i < chroma_rows; ++i)
{
if ((vf->priv->dirty_rows[first_row + i*2] == 0) ||
(vf->priv->dirty_rows[first_row + i*2 + 1] == 0)) {
for (j = 0, k = 0; j < vf->dmpi->chroma_width; ++j, k+=2) {
val = *(src + j);
*(dst + k) = val;
*(dst + k + 1) = val;
*(dst_next + k) = val;
*(dst_next + k + 1) = val;
}
}
src += src_stride;
dst = dst_next + dst_stride;
dst_next = dst + dst_stride;
}
}
for (i = first_row; i < last_row; ++i)
vf->priv->dirty_rows[i] = 1;
}
/**
* \brief Copy all previously copied rows back to render_context.dmpi
*/
static void copy_to_image(struct vf_instance_s* vf)
{
int pl;
int i, j, k;
for (pl = 1; pl < 3; ++pl) {
int dst_stride = vf->dmpi->stride[pl];
int src_stride = vf->dmpi->stride[pl] * 2;
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->dmpi->chroma_height; ++i)
{
if ((vf->priv->dirty_rows[i*2] == 1)) {
assert(vf->priv->dirty_rows[i*2 + 1] == 1);
for (j = 0, k = 0; j < vf->dmpi->chroma_width; ++j, k+=2) {
unsigned val = 0;
val += *(src + k);
val += *(src + k + 1);
val += *(src_next + k);
val += *(src_next + k + 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_s* 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 * 2 * dmpi->chroma_width;
dstv = vf->priv->planes[2] + dst_x + dst_y * 2 * dmpi->chroma_width;
for (i = 0; i < bitmap_h; ++i) {
for (j = 0; j < bitmap_w; ++j) {
unsigned k = ((unsigned)src[j]) * opacity / 255;
dsty[j] = (k*y + (255-k)*dsty[j]) / 255;
dstu[j] = (k*u + (255-k)*dstu[j]) / 255;
dstv[j] = (k*v + (255-k)*dstv[j]) / 255;
}
src += stride;
dsty += dmpi->stride[0];
dstu += 2 * dmpi->chroma_width;
dstv += 2 * dmpi->chroma_width;
}
}
static int render_frame(struct vf_instance_s* vf, mp_image_t *mpi, const ass_image_t* img)
{
if (img) {
memset(vf->priv->dirty_rows, 0, vf->priv->outh); // reset dirty rows
while (img) {
copy_from_image(vf, img->dst_y, img->dst_y + img->h);
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_s* vf, mp_image_t *mpi, double pts)
{
ass_image_t* images = 0;
if (sub_visibility && vf->priv->ass_priv && ass_track && (pts != MP_NOPTS_VALUE))
images = ass_render_frame(vf->priv->ass_priv, ass_track, (pts+sub_delay) * 1000 + .5);
prepare_image(vf, mpi);
if (images) render_frame(vf, mpi, images);
return vf_next_put_image(vf, vf->dmpi, pts);
}
static int query_format(struct vf_instance_s* 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_INIT_EOSD:
vf->priv->ass_priv = ass_renderer_init((ass_library_t*)data);
return vf->priv->ass_priv ? CONTROL_TRUE : CONTROL_FALSE;
case VFCTRL_DRAW_EOSD:
if (vf->priv->ass_priv) return CONTROL_TRUE;
break;
}
return vf_next_control(vf, request, data);
}
static void uninit(struct vf_instance_s* vf)
{
if (vf->priv->ass_priv)
ass_renderer_done(vf->priv->ass_priv);
if (vf->priv->planes[1])
free(vf->priv->planes[1]);
if (vf->priv->planes[2])
free(vf->priv->planes[2]);
if (vf->priv->dirty_rows)
free(vf->priv->dirty_rows);
}
static unsigned int fmt_list[]={
IMGFMT_YV12,
IMGFMT_I420,
IMGFMT_IYUV,
0
};
static int 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 || (vf->priv->auto_insert && flags&VFCAP_EOSD))
{
uninit(vf);
return 0;
}
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;
return 1;
}
#define ST_OFF(f) M_ST_OFF(struct vf_priv_s,f)
static 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 m_struct_t vf_opts = {
"ass",
sizeof(struct vf_priv_s),
&vf_priv_dflt,
vf_opts_fields
};
vf_info_t vf_info_ass = {
"Render ASS/SSA subtitles",
"ass",
"Evgeniy Stepanov",
"",
open,
&vf_opts
};