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|
/* rendersub.c
Copyright (c) 2003-2020 HandBrake Team
This file is part of the HandBrake source code
Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License v2.
For full terms see the file COPYING file or visit http://www.gnu.org/licenses/gpl-2.0.html
*/
#include "handbrake/handbrake.h"
#include "handbrake/hbffmpeg.h"
#include <ass/ass.h>
#define ABS(a) ((a) > 0 ? (a) : (-(a)))
struct hb_filter_private_s
{
// Common
int crop[4];
int type;
struct SwsContext * sws;
int sws_width;
int sws_height;
// VOBSUB
hb_list_t * sub_list; // List of active subs
// SSA
ASS_Library * ssa;
ASS_Renderer * renderer;
ASS_Track * ssaTrack;
uint8_t script_initialized;
// SRT
int line;
hb_buffer_t * current_sub;
hb_filter_init_t input;
hb_filter_init_t output;
};
// VOBSUB
static int vobsub_post_init( hb_filter_object_t * filter, hb_job_t * job );
static int vobsub_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void vobsub_close( hb_filter_object_t * filter );
// SSA
static int ssa_post_init( hb_filter_object_t * filter, hb_job_t * job );
static int ssa_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void ssa_close( hb_filter_object_t * filter );
// SRT
static int textsub_post_init( hb_filter_object_t * filter, hb_job_t * job );
static int cc608sub_post_init( hb_filter_object_t * filter, hb_job_t * job );
static int textsub_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void textsub_close( hb_filter_object_t * filter );
// PGS
static int pgssub_post_init( hb_filter_object_t * filter, hb_job_t * job );
static int pgssub_work ( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void pgssub_close( hb_filter_object_t * filter );
// Entry points
static int hb_rendersub_init( hb_filter_object_t * filter,
hb_filter_init_t * init );
static int hb_rendersub_post_init( hb_filter_object_t * filter, hb_job_t *job );
static int hb_rendersub_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void hb_rendersub_close( hb_filter_object_t * filter );
hb_filter_object_t hb_filter_render_sub =
{
.id = HB_FILTER_RENDER_SUB,
.enforce_order = 1,
.name = "Subtitle renderer",
.settings = NULL,
.init = hb_rendersub_init,
.post_init = hb_rendersub_post_init,
.work = hb_rendersub_work,
.close = hb_rendersub_close,
};
// blends src YUVA420P buffer into dst
// dst is currently YUV420P, but in future will be other formats as well
static void blend( hb_buffer_t *dst, hb_buffer_t *src, int left, int top )
{
int xx, yy;
int ww, hh;
int x0, y0;
uint8_t *y_in, *y_out;
uint8_t *u_in, *u_out;
uint8_t *v_in, *v_out;
uint8_t *a_in, alpha;
x0 = y0 = 0;
if( left < 0 )
{
x0 = -left;
}
if( top < 0 )
{
y0 = -top;
}
ww = src->f.width;
if( src->f.width - x0 > dst->f.width - left )
{
ww = dst->f.width - left + x0;
}
hh = src->f.height;
if( src->f.height - y0 > dst->f.height - top )
{
hh = dst->f.height - top + y0;
}
// Blend luma
for( yy = y0; yy < hh; yy++ )
{
y_in = src->plane[0].data + yy * src->plane[0].stride;
y_out = dst->plane[0].data + ( yy + top ) * dst->plane[0].stride;
a_in = src->plane[3].data + yy * src->plane[3].stride;
for( xx = x0; xx < ww; xx++ )
{
alpha = a_in[xx];
/*
* Merge the luminance and alpha with the picture
*/
y_out[left + xx] =
( (uint16_t)y_out[left + xx] * ( 255 - alpha ) +
(uint16_t)y_in[xx] * alpha ) / 255;
}
}
// Blend U & V
// Assumes source and dest are the same PIX_FMT
int hshift = 0;
int wshift = 0;
if( dst->plane[1].height < dst->plane[0].height )
hshift = 1;
if( dst->plane[1].width < dst->plane[0].width )
wshift = 1;
for( yy = y0 >> hshift; yy < hh >> hshift; yy++ )
{
u_in = src->plane[1].data + yy * src->plane[1].stride;
u_out = dst->plane[1].data + ( yy + ( top >> hshift ) ) * dst->plane[1].stride;
v_in = src->plane[2].data + yy * src->plane[2].stride;
v_out = dst->plane[2].data + ( yy + ( top >> hshift ) ) * dst->plane[2].stride;
a_in = src->plane[3].data + ( yy << hshift ) * src->plane[3].stride;
for( xx = x0 >> wshift; xx < ww >> wshift; xx++ )
{
alpha = a_in[xx << wshift];
// Blend averge U and alpha
u_out[(left >> wshift) + xx] =
( (uint16_t)u_out[(left >> wshift) + xx] * ( 255 - alpha ) +
(uint16_t)u_in[xx] * alpha ) / 255;
// Blend V and alpha
v_out[(left >> wshift) + xx] =
( (uint16_t)v_out[(left >> wshift) + xx] * ( 255 - alpha ) +
(uint16_t)v_in[xx] * alpha ) / 255;
}
}
}
// applies subtitle 'sub' YUVA420P buffer into destination 'buf'
// 'buf' is currently YUV420P, but in future will be other formats as well
// Assumes that the input destination buffer has the same dimensions
// as the original title dimensions
static void ApplySub( hb_filter_private_t * pv, hb_buffer_t * buf, hb_buffer_t * sub )
{
blend( buf, sub, sub->f.x, sub->f.y );
}
static hb_buffer_t * ScaleSubtitle(hb_filter_private_t *pv,
hb_buffer_t *sub, hb_buffer_t *buf)
{
hb_buffer_t * scaled;
double xfactor = 1., yfactor = 1.;
// Do we need to rescale subtitles?
if (sub->f.window_width > 0 && sub->f.window_height > 0)
{
// TODO: Factor aspect ratio
// For now, assume subtitle and video PAR is the same.
xfactor = (double)buf->f.width / sub->f.window_width;
yfactor = (double)buf->f.height / sub->f.window_height;
// The video may have been cropped. This will make xfactor != yfactor
// even though video and subtitles are the same PAR. So use the
// larger of as the scale factor.
if (xfactor > yfactor)
{
yfactor = xfactor;
}
else
{
xfactor = yfactor;
}
}
if (ABS(xfactor - 1) > 0.01 || ABS(yfactor - 1) > 0.01)
{
uint8_t * in_data[4], * out_data[4];
int in_stride[4], out_stride[4];
int width, height;
width = sub->f.width * xfactor;
height = sub->f.height * yfactor;
// Note that subtitle frame buffer is YUVA420P, not YUV420P, it has alpha
scaled = hb_frame_buffer_init(AV_PIX_FMT_YUVA420P, width, height);
if (scaled == NULL)
return NULL;
scaled->f.x = sub->f.x * xfactor;
scaled->f.y = sub->f.y * yfactor;
hb_picture_fill(in_data, in_stride, sub);
hb_picture_fill(out_data, out_stride, scaled);
if (pv->sws == NULL ||
pv->sws_width != width ||
pv->sws_height != height)
{
if (pv->sws!= NULL)
sws_freeContext(pv->sws);
pv->sws = hb_sws_get_context(
sub->f.width, sub->f.height, sub->f.fmt,
scaled->f.width, scaled->f.height, sub->f.fmt,
SWS_LANCZOS|SWS_ACCURATE_RND, SWS_CS_DEFAULT);
pv->sws_width = width;
pv->sws_height = height;
}
sws_scale(pv->sws, (const uint8_t* const *)in_data, in_stride,
0, sub->f.height, out_data, out_stride);
}
else
{
scaled = hb_buffer_dup(sub);
}
int top, left, margin_top, margin_percent;
/*
* Percent of height of picture that form a margin that subtitles
* should not be displayed within.
*/
margin_percent = 2;
/*
* If necessary, move the subtitle so it is not in a cropped zone.
* When it won't fit, we center it so we lose as much on both ends.
* Otherwise we try to leave a 20px or 2% margin around it.
*/
margin_top = ( ( buf->f.height - pv->crop[0] - pv->crop[1] ) *
margin_percent ) / 100;
if( margin_top > 20 )
{
/*
* A maximum margin of 20px regardless of height of the picture.
*/
margin_top = 20;
}
if( scaled->f.height > buf->f.height - pv->crop[0] - pv->crop[1] -
( margin_top * 2 ) )
{
/*
* The subtitle won't fit in the cropped zone, so center
* it vertically so we fit in as much as we can.
*/
top = pv->crop[0] + ( buf->f.height - pv->crop[0] -
pv->crop[1] - scaled->f.height ) / 2;
}
else if( scaled->f.y < pv->crop[0] + margin_top )
{
/*
* The subtitle fits in the cropped zone, but is currently positioned
* within our top margin, so move it outside of our margin.
*/
top = pv->crop[0] + margin_top;
}
else if( scaled->f.y > buf->f.height - pv->crop[1] - margin_top - scaled->f.height )
{
/*
* The subtitle fits in the cropped zone, and is not within the top
* margin but is within the bottom margin, so move it to be above
* the margin.
*/
top = buf->f.height - pv->crop[1] - margin_top - scaled->f.height;
}
else
{
/*
* The subtitle is fine where it is.
*/
top = scaled->f.y;
}
if( scaled->f.width > buf->f.width - pv->crop[2] - pv->crop[3] - 40 )
left = pv->crop[2] + ( buf->f.width - pv->crop[2] -
pv->crop[3] - scaled->f.width ) / 2;
else if( scaled->f.x < pv->crop[2] + 20 )
left = pv->crop[2] + 20;
else if( scaled->f.x > buf->f.width - pv->crop[3] - 20 - scaled->f.width )
left = buf->f.width - pv->crop[3] - 20 - scaled->f.width;
else
left = scaled->f.x;
scaled->f.x = left;
scaled->f.y = top;
return scaled;
}
// Assumes that the input buffer has the same dimensions
// as the original title dimensions
static void ApplyVOBSubs( hb_filter_private_t * pv, hb_buffer_t * buf )
{
int ii;
hb_buffer_t *sub, *next;
for( ii = 0; ii < hb_list_count(pv->sub_list); )
{
sub = hb_list_item( pv->sub_list, ii );
if (ii + 1 < hb_list_count(pv->sub_list))
next = hb_list_item( pv->sub_list, ii + 1 );
else
next = NULL;
if ((sub->s.stop != AV_NOPTS_VALUE && sub->s.stop <= buf->s.start) ||
(next != NULL && sub->s.stop == AV_NOPTS_VALUE && next->s.start <= buf->s.start))
{
// Subtitle stop is in the past, delete it
hb_list_rem( pv->sub_list, sub );
hb_buffer_close( &sub );
}
else if( sub->s.start <= buf->s.start )
{
// The subtitle has started before this frame and ends
// after it. Render the subtitle into the frame.
while ( sub )
{
hb_buffer_t *scaled = ScaleSubtitle(pv, sub, buf);
ApplySub( pv, buf, scaled );
hb_buffer_close(&scaled);
sub = sub->next;
}
ii++;
}
else
{
// The subtitle starts in the future. No need to continue.
break;
}
}
}
static int vobsub_post_init( hb_filter_object_t * filter, hb_job_t * job )
{
hb_filter_private_t * pv = filter->private_data;
pv->sub_list = hb_list_init();
return 0;
}
static void vobsub_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if( !pv )
{
return;
}
if( pv->sub_list )
hb_list_empty( &pv->sub_list );
free( pv );
filter->private_data = NULL;
}
static int vobsub_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_filter_private_t * pv = filter->private_data;
hb_buffer_t * in = *buf_in;
hb_buffer_t * sub;
if (in->s.flags & HB_BUF_FLAG_EOF)
{
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_DONE;
}
// Get any pending subtitles and add them to the active
// subtitle list
while( ( sub = hb_fifo_get( filter->subtitle->fifo_out ) ) )
{
if (sub->s.flags & HB_BUF_FLAG_EOF)
{
hb_buffer_close(&sub);
break;
}
hb_list_add( pv->sub_list, sub );
}
ApplyVOBSubs( pv, in );
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_OK;
}
static uint8_t ssaAlpha( ASS_Image *frame, int x, int y )
{
unsigned frameA = ( frame->color ) & 0xff;
unsigned gliphA = frame->bitmap[y*frame->stride + x];
// Alpha for this pixel is the frame opacity (255 - frameA)
// multiplied by the gliph alfa (gliphA) for this pixel
unsigned alpha = (255 - frameA) * gliphA >> 8;
return (uint8_t)alpha;
}
// Returns a subtitle rendered to a YUVA420P frame
static hb_buffer_t * RenderSSAFrame( hb_filter_private_t * pv, ASS_Image * frame )
{
hb_buffer_t *sub;
int xx, yy;
unsigned r = ( frame->color >> 24 ) & 0xff;
unsigned g = ( frame->color >> 16 ) & 0xff;
unsigned b = ( frame->color >> 8 ) & 0xff;
int yuv = hb_rgb2yuv((r << 16) | (g << 8) | b );
unsigned frameY = (yuv >> 16) & 0xff;
unsigned frameV = (yuv >> 8 ) & 0xff;
unsigned frameU = (yuv >> 0 ) & 0xff;
// Note that subtitle frame buffer is YUVA420P, not YUV420P, it has alpha
sub = hb_frame_buffer_init(AV_PIX_FMT_YUVA420P, frame->w, frame->h);
if (sub == NULL)
return NULL;
uint8_t *y_out, *u_out, *v_out, *a_out;
y_out = sub->plane[0].data;
u_out = sub->plane[1].data;
v_out = sub->plane[2].data;
a_out = sub->plane[3].data;
for( yy = 0; yy < frame->h; yy++ )
{
for( xx = 0; xx < frame->w; xx++ )
{
y_out[xx] = frameY;
if( ( yy & 1 ) == 0 )
{
u_out[xx>>1] = frameU;
v_out[xx>>1] = frameV;
}
a_out[xx] = ssaAlpha( frame, xx, yy );;
}
y_out += sub->plane[0].stride;
if( ( yy & 1 ) == 0 )
{
u_out += sub->plane[1].stride;
v_out += sub->plane[2].stride;
}
a_out += sub->plane[3].stride;
}
sub->f.width = frame->w;
sub->f.height = frame->h;
sub->f.x = frame->dst_x + pv->crop[2];
sub->f.y = frame->dst_y + pv->crop[0];
return sub;
}
static void ApplySSASubs( hb_filter_private_t * pv, hb_buffer_t * buf )
{
ASS_Image *frameList;
hb_buffer_t *sub;
frameList = ass_render_frame( pv->renderer, pv->ssaTrack,
buf->s.start / 90, NULL );
if ( !frameList )
return;
ASS_Image *frame;
for (frame = frameList; frame; frame = frame->next) {
sub = RenderSSAFrame( pv, frame );
if( sub )
{
ApplySub( pv, buf, sub );
hb_buffer_close( &sub );
}
}
}
static void ssa_log(int level, const char *fmt, va_list args, void *data)
{
if ( level < 5 ) // same as default verbosity when no callback is set
{
hb_valog( 1, "[ass]", fmt, args );
}
}
static int ssa_post_init( hb_filter_object_t * filter, hb_job_t * job )
{
hb_filter_private_t * pv = filter->private_data;
pv->ssa = ass_library_init();
if ( !pv->ssa ) {
hb_error( "decssasub: libass initialization failed\n" );
return 1;
}
// Redirect libass output to hb_log
ass_set_message_cb( pv->ssa, ssa_log, NULL );
// Load embedded fonts
hb_list_t * list_attachment = job->list_attachment;
int i;
for ( i = 0; i < hb_list_count(list_attachment); i++ )
{
hb_attachment_t * attachment = hb_list_item( list_attachment, i );
if ( attachment->type == FONT_TTF_ATTACH ||
attachment->type == FONT_OTF_ATTACH )
{
ass_add_font(
pv->ssa,
attachment->name,
attachment->data,
attachment->size );
}
}
ass_set_extract_fonts( pv->ssa, 1 );
ass_set_style_overrides( pv->ssa, NULL );
pv->renderer = ass_renderer_init( pv->ssa );
if ( !pv->renderer ) {
hb_log( "decssasub: renderer initialization failed\n" );
return 1;
}
ass_set_use_margins( pv->renderer, 0 );
ass_set_hinting( pv->renderer, ASS_HINTING_LIGHT ); // VLC 1.0.4 uses this
ass_set_font_scale( pv->renderer, 1.0 );
ass_set_line_spacing( pv->renderer, 1.0 );
// Setup default font family
//
// SSA v4.00 requires that "Arial" be the default font
const char *font = NULL;
const char *family = "Arial";
// NOTE: This can sometimes block for several *seconds*.
// It seems that process_fontdata() for some embedded fonts is slow.
ass_set_fonts( pv->renderer, font, family, /*haveFontConfig=*/1, NULL, 1 );
// Setup track state
pv->ssaTrack = ass_new_track( pv->ssa );
if ( !pv->ssaTrack ) {
hb_log( "decssasub: ssa track initialization failed\n" );
return 1;
}
int height = job->title->geometry.height - job->crop[0] - job->crop[1];
int width = job->title->geometry.width - job->crop[2] - job->crop[3];
ass_set_frame_size( pv->renderer, width, height);
double par = (double)job->par.num / job->par.den;
ass_set_aspect_ratio( pv->renderer, 1, par );
return 0;
}
static void ssa_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if( !pv )
{
return;
}
if ( pv->ssaTrack )
ass_free_track( pv->ssaTrack );
if ( pv->renderer )
ass_renderer_done( pv->renderer );
if ( pv->ssa )
ass_library_done( pv->ssa );
free( pv );
filter->private_data = NULL;
}
static int ssa_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_filter_private_t * pv = filter->private_data;
hb_buffer_t * in = *buf_in;
hb_buffer_t * sub;
if (!pv->script_initialized)
{
// NOTE: The codec extradata is expected to be in MKV format
// I would like to initialize this in ssa_post_init, but when we are
// transcoding text subtitles to SSA, the extradata does not
// get initialized until the decoder is initialized. Since
// decoder initialization happens after filter initialization,
// we need to postpone this.
ass_process_codec_private(pv->ssaTrack,
(char*)filter->subtitle->extradata,
filter->subtitle->extradata_size);
pv->script_initialized = 1;
}
if (in->s.flags & HB_BUF_FLAG_EOF)
{
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_DONE;
}
// Get any pending subtitles and add them to the active
// subtitle list
while( ( sub = hb_fifo_get( filter->subtitle->fifo_out ) ) )
{
if (sub->s.flags & HB_BUF_FLAG_EOF)
{
hb_buffer_close(&sub);
break;
}
// Parse MKV-SSA packet
// SSA subtitles always have an explicit stop time, so we
// do not need to do special processing for stop == AV_NOPTS_VALUE
ass_process_chunk( pv->ssaTrack, (char*)sub->data, sub->size,
sub->s.start / 90,
(sub->s.stop - sub->s.start) / 90 );
hb_buffer_close(&sub);
}
ApplySSASubs( pv, in );
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_OK;
}
static int cc608sub_post_init( hb_filter_object_t * filter, hb_job_t * job )
{
// Text subtitles for which we create a dummy ASS header need
// to have the header rewritten with the correct dimensions.
int height = job->title->geometry.height - job->crop[0] - job->crop[1];
int width = job->title->geometry.width - job->crop[2] - job->crop[3];
int safe_height = 0.8 * job->title->geometry.height;
// Use fixed width font for CC
hb_subtitle_add_ssa_header(filter->subtitle, HB_FONT_MONO,
.08 * safe_height, width, height);
return ssa_post_init(filter, job);
}
static int textsub_post_init( hb_filter_object_t * filter, hb_job_t * job )
{
// Text subtitles for which we create a dummy ASS header need
// to have the header rewritten with the correct dimensions.
int height = job->title->geometry.height - job->crop[0] - job->crop[1];
int width = job->title->geometry.width - job->crop[2] - job->crop[3];
hb_subtitle_add_ssa_header(filter->subtitle, HB_FONT_SANS,
.066 * job->title->geometry.height,
width, height);
return ssa_post_init(filter, job);
}
static void textsub_close( hb_filter_object_t * filter )
{
return ssa_close(filter);
}
static void process_sub(hb_filter_private_t *pv, hb_buffer_t *sub)
{
int64_t start, dur;
char *ssa, *tmp;
// libass expects every chunk to have a unique sequence number
// since we are repeating subs in some cases, we need to replace
// the sequence number.
tmp = strchr((char*)sub->data, ',');
if (tmp == NULL)
return;
ssa = hb_strdup_printf("%d%s", ++pv->line, tmp);
// Parse MKV-SSA packet
// SSA subtitles always have an explicit stop time, so we
// do not need to do special processing for stop == AV_NOPTS_VALUE
start = sub->s.start;
dur = sub->s.stop - sub->s.start;
ass_process_chunk(pv->ssaTrack, ssa, sub->size, start, dur);
free(ssa);
}
static int textsub_work(hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out)
{
hb_filter_private_t * pv = filter->private_data;
hb_buffer_t * in = *buf_in;
hb_buffer_t * sub;
if (!pv->script_initialized)
{
ass_process_codec_private(pv->ssaTrack,
(char*)filter->subtitle->extradata,
filter->subtitle->extradata_size);
pv->script_initialized = 1;
}
if (in->s.flags & HB_BUF_FLAG_EOF)
{
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_DONE;
}
int in_start_ms = in->s.start / 90;
// Get any pending subtitles and add them to the active
// subtitle list
while ((sub = hb_fifo_get(filter->subtitle->fifo_out)))
{
if (sub->s.flags & HB_BUF_FLAG_EOF)
{
hb_buffer_close(&sub);
if (pv->current_sub != NULL)
{
// Make us some duration for final sub
pv->current_sub->s.stop = pv->current_sub->s.start +
90000LL * 10;
process_sub(pv, pv->current_sub);
hb_buffer_close(&pv->current_sub);
}
break;
}
// libass expects times in ms. So to make the math easy,
// convert to ms immediately.
sub->s.start /= 90;
if (sub->s.stop != AV_NOPTS_VALUE)
{
sub->s.stop /= 90;
}
// Subtitle formats such as CC can have stop times
// that are not known until an "erase display" command
// is encountered in the stream. For these formats
// current_sub is the currently active subtitle for which
// we do not yet know the stop time. We do not currently
// support overlapping subtitles of this type.
if (pv->current_sub != NULL)
{
// Next sub start time tells us the stop time of the
// current sub when it is not known in advance.
pv->current_sub->s.stop = sub->s.start;
process_sub(pv, pv->current_sub);
hb_buffer_close(&pv->current_sub);
}
if (sub->s.flags & HB_BUF_FLAG_EOS)
{
// marker used to "clear" previous sub that had
// an unknown duration
hb_buffer_close(&sub);
}
else if (sub->s.stop == AV_NOPTS_VALUE)
{
// We don't know the duration of this sub. So we will
// apply it to every video frame until we see a "clear" sub.
pv->current_sub = sub;
pv->current_sub->s.stop = pv->current_sub->s.start;
}
else
{
// Duration of this subtitle is known, so we can just
// process it normally.
process_sub(pv, sub);
hb_buffer_close(&sub);
}
}
if (pv->current_sub != NULL && pv->current_sub->s.start <= in_start_ms)
{
// We don't know the duration of this subtitle, but we know
// that it started before the current video frame and that
// it is still active. So render it on this video frame.
pv->current_sub->s.start = pv->current_sub->s.stop;
pv->current_sub->s.stop = in_start_ms + 1;
process_sub(pv, pv->current_sub);
}
ApplySSASubs(pv, in);
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_OK;
}
static void ApplyPGSSubs( hb_filter_private_t * pv, hb_buffer_t * buf )
{
int index;
hb_buffer_t * old_sub;
hb_buffer_t * sub;
// Each PGS subtitle supersedes anything that preceded it.
// Find the active subtitle (if there is one), and delete
// everything before it.
for( index = hb_list_count( pv->sub_list ) - 1; index > 0; index-- )
{
sub = hb_list_item( pv->sub_list, index);
if ( sub->s.start <= buf->s.start )
{
while ( index > 0 )
{
old_sub = hb_list_item( pv->sub_list, index - 1);
hb_list_rem( pv->sub_list, old_sub );
hb_buffer_close( &old_sub );
index--;
}
}
}
// Some PGS subtitles have no content and only serve to clear
// the screen. If any of these are at the front of our list,
// we can now get rid of them.
while ( hb_list_count( pv->sub_list ) > 0 )
{
sub = hb_list_item( pv->sub_list, 0 );
if (sub->f.width != 0 && sub->f.height != 0)
break;
hb_list_rem( pv->sub_list, sub );
hb_buffer_close( &sub );
}
// Check to see if there's an active subtitle, and apply it.
if ( hb_list_count( pv->sub_list ) > 0)
{
sub = hb_list_item( pv->sub_list, 0 );
if ( sub->s.start <= buf->s.start )
{
hb_buffer_t *scaled = ScaleSubtitle(pv, sub, buf);
ApplySub( pv, buf, scaled );
hb_buffer_close(&scaled);
}
}
}
static int pgssub_post_init( hb_filter_object_t * filter, hb_job_t * job )
{
hb_filter_private_t * pv = filter->private_data;
pv->sub_list = hb_list_init();
return 0;
}
static void pgssub_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if ( !pv )
{
return;
}
if ( pv->sub_list )
hb_list_empty( &pv->sub_list );
free( pv );
filter->private_data = NULL;
}
static int pgssub_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out)
{
hb_filter_private_t * pv = filter->private_data;
hb_buffer_t * in = *buf_in;
hb_buffer_t * sub;
if (in->s.flags & HB_BUF_FLAG_EOF)
{
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_DONE;
}
// Get any pending subtitles and add them to the active
// subtitle list
while ( ( sub = hb_fifo_get( filter->subtitle->fifo_out ) ) )
{
if (sub->s.flags & HB_BUF_FLAG_EOF)
{
hb_buffer_close(&sub);
break;
}
hb_list_add( pv->sub_list, sub );
}
ApplyPGSSubs( pv, in );
*buf_in = NULL;
*buf_out = in;
return HB_FILTER_OK;
}
static int hb_rendersub_init( hb_filter_object_t * filter,
hb_filter_init_t * init )
{
filter->private_data = calloc( 1, sizeof(struct hb_filter_private_s) );
hb_filter_private_t * pv = filter->private_data;
hb_subtitle_t *subtitle;
int ii;
pv->input = *init;
// Find the subtitle we need
for( ii = 0; ii < hb_list_count(init->job->list_subtitle); ii++ )
{
subtitle = hb_list_item( init->job->list_subtitle, ii );
if( subtitle && subtitle->config.dest == RENDERSUB )
{
// Found it
filter->subtitle = subtitle;
pv->type = subtitle->source;
break;
}
}
if( filter->subtitle == NULL )
{
hb_log("rendersub: no subtitle marked for burn");
return 1;
}
pv->output = *init;
return 0;
}
static int hb_rendersub_post_init( hb_filter_object_t * filter, hb_job_t *job )
{
hb_filter_private_t * pv = filter->private_data;
pv->crop[0] = job->crop[0];
pv->crop[1] = job->crop[1];
pv->crop[2] = job->crop[2];
pv->crop[3] = job->crop[3];
switch( pv->type )
{
case VOBSUB:
{
return vobsub_post_init( filter, job );
}
case SSASUB:
{
return ssa_post_init( filter, job );
}
case IMPORTSRT:
case IMPORTSSA:
case UTF8SUB:
case TX3GSUB:
{
return textsub_post_init( filter, job );
}
case CC608SUB:
{
return cc608sub_post_init( filter, job );
}
case DVBSUB:
case PGSSUB:
{
return pgssub_post_init( filter, job );
}
default:
{
hb_log("rendersub: unsupported subtitle format %d", pv->type );
return 1;
}
}
}
static int hb_rendersub_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_filter_private_t * pv = filter->private_data;
switch( pv->type )
{
case VOBSUB:
{
return vobsub_work( filter, buf_in, buf_out );
}
case SSASUB:
{
return ssa_work( filter, buf_in, buf_out );
}
case IMPORTSRT:
case IMPORTSSA:
case CC608SUB:
case UTF8SUB:
case TX3GSUB:
{
return textsub_work( filter, buf_in, buf_out );
}
case DVBSUB:
case PGSSUB:
{
return pgssub_work( filter, buf_in, buf_out );
}
default:
{
hb_error("rendersub: unsupported subtitle format %d", pv->type );
return 1;
}
}
}
static void hb_rendersub_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if (pv->sws != NULL)
{
sws_freeContext(pv->sws);
}
switch( pv->type )
{
case VOBSUB:
{
vobsub_close( filter );
} break;
case SSASUB:
{
ssa_close( filter );
} break;
case IMPORTSRT:
case IMPORTSSA:
case CC608SUB:
case UTF8SUB:
case TX3GSUB:
{
textsub_close( filter );
} break;
case DVBSUB:
case PGSSUB:
{
pgssub_close( filter );
} break;
default:
{
hb_error("rendersub: unsupported subtitle format %d", pv->type );
} break;
}
}
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