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/* $Id: render.c,v 1.17 2005/04/14 17:37:54 titer Exp $
This file is part of the HandBrake source code.
Homepage: <http://handbrake.m0k.org/>.
It may be used under the terms of the GNU General Public License. */
#include "hb.h"
#include "ffmpeg/avcodec.h"
struct hb_work_private_s
{
hb_job_t * job;
ImgReSampleContext * context;
AVPicture pic_raw;
AVPicture pic_deint;
AVPicture pic_render;
hb_buffer_t * buf_deint;
};
int renderInit( hb_work_object_t *, hb_job_t * );
int renderWork( hb_work_object_t *, hb_buffer_t **, hb_buffer_t ** );
void renderClose( hb_work_object_t * );
hb_work_object_t hb_render =
{
WORK_RENDER,
"Renderer",
renderInit,
renderWork,
renderClose
};
static void ApplySub( hb_job_t * job, hb_buffer_t * buf,
hb_buffer_t ** _sub )
{
hb_buffer_t * sub = *_sub;
hb_title_t * title = job->title;
int i, j, offset_top, offset_left;
uint8_t * lum, * alpha, * out;
if( !sub )
{
return;
}
/* If necessary, move the subtitle so it is not in a cropped zone.
When it won't fit, we center it so we loose as much on both ends.
Otherwise we try to leave a 20px margin around it. */
if( sub->height > title->height - job->crop[0] - job->crop[1] - 40 )
offset_top = job->crop[0] + ( title->height - job->crop[0] -
job->crop[1] - sub->height ) / 2;
else if( sub->y < job->crop[0] + 20 )
offset_top = job->crop[0] + 20;
else if( sub->y > title->height - job->crop[1] - 20 - sub->height )
offset_top = title->height - job->crop[1] - 20 - sub->height;
else
offset_top = sub->y;
if( sub->width > title->width - job->crop[2] - job->crop[3] - 40 )
offset_left = job->crop[2] + ( title->width - job->crop[2] -
job->crop[3] - sub->width ) / 2;
else if( sub->x < job->crop[2] + 20 )
offset_left = job->crop[2] + 20;
else if( sub->x > title->width - job->crop[3] - 20 - sub->width )
offset_left = title->width - job->crop[3] - 20 - sub->width;
else
offset_left = sub->x;
lum = sub->data;
alpha = lum + sub->width * sub->height;
out = buf->data + offset_top * title->width + offset_left;
for( i = 0; i < sub->height; i++ )
{
if( offset_top + i >= 0 && offset_top + i < title->height )
{
for( j = 0; j < sub->width; j++ )
{
if( offset_left + j >= 0 && offset_left + j < title->width )
{
out[j] = ( (uint16_t) out[j] * ( 16 - (uint16_t) alpha[j] ) +
(uint16_t) lum[j] * (uint16_t) alpha[j] ) >> 4;
}
}
}
lum += sub->width;
alpha += sub->width;
out += title->width;
}
hb_buffer_close( _sub );
}
int renderWork( hb_work_object_t * w, hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_work_private_t * pv = w->private_data;
hb_job_t * job = pv->job;
hb_title_t * title = job->title;
hb_buffer_t * in = *buf_in, * buf;
avpicture_fill( &pv->pic_raw, in->data, PIX_FMT_YUV420P,
title->width, title->height );
buf = hb_buffer_init( 3 * job->width * job->height / 2 );
buf->start = in->start;
buf->stop = in->stop;
if( job->deinterlace && pv->context )
{
avpicture_fill( &pv->pic_render, buf->data, PIX_FMT_YUV420P,
job->width, job->height );
avpicture_deinterlace( &pv->pic_deint, &pv->pic_raw,
PIX_FMT_YUV420P, title->width,
title->height );
ApplySub( job, pv->buf_deint, &in->sub );
img_resample( pv->context, &pv->pic_render, &pv->pic_deint );
}
else if( job->deinterlace )
{
avpicture_fill( &pv->pic_deint, buf->data, PIX_FMT_YUV420P,
job->width, job->height );
avpicture_deinterlace( &pv->pic_deint, &pv->pic_raw,
PIX_FMT_YUV420P, title->width,
title->height );
ApplySub( job, buf, &in->sub );
}
else if( pv->context )
{
ApplySub( job, in, &in->sub );
avpicture_fill( &pv->pic_render, buf->data, PIX_FMT_YUV420P,
job->width, job->height );
img_resample( pv->context, &pv->pic_render, &pv->pic_raw );
}
else
{
hb_buffer_close( &buf );
ApplySub( job, in, &in->sub );
buf = in;
*buf_in = NULL;
}
(*buf_out) = buf;
return HB_WORK_OK;
}
void renderClose( hb_work_object_t * w )
{
}
int renderInit( hb_work_object_t * w, hb_job_t * job )
{
hb_title_t * title;
hb_work_private_t * pv = calloc( 1, sizeof( hb_work_private_t ) );
w->private_data = pv;
title = job->title;
pv->job = job;
if( job->crop[0] || job->crop[1] || job->crop[2] || job->crop[3] ||
job->width != title->width || job->height != title->height )
{
pv->context = img_resample_full_init(
job->width, job->height, title->width, title->height,
job->crop[0], job->crop[1], job->crop[2], job->crop[3],
0, 0, 0, 0 );
}
if( job->deinterlace )
{
/* Allocate a constant buffer used for deinterlacing */
pv->buf_deint = hb_buffer_init( 3 * title->width *
title->height / 2 );
avpicture_fill( &pv->pic_deint, pv->buf_deint->data,
PIX_FMT_YUV420P, title->width, title->height );
}
return 0;
}
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