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#include "hb.h"
#include "hbffmpeg.h"
struct hb_filter_private_s
{
int width_in;
int height_in;
int pix_fmt;
int pix_fmt_out;
int width_out;
int height_out;
int crop[4];
struct SwsContext * context;
};
static int hb_crop_scale_init( hb_filter_object_t * filter,
hb_filter_init_t * init );
static int hb_crop_scale_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static int hb_crop_scale_info( hb_filter_object_t * filter,
hb_filter_info_t * info );
static void hb_crop_scale_close( hb_filter_object_t * filter );
hb_filter_object_t hb_filter_crop_scale =
{
.id = HB_FILTER_CROP_SCALE,
.enforce_order = 1,
.name = "Crop and Scale",
.settings = NULL,
.init = hb_crop_scale_init,
.work = hb_crop_scale_work,
.close = hb_crop_scale_close,
.info = hb_crop_scale_info,
};
static int hb_crop_scale_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;
// TODO: add pix format option to settings
pv->pix_fmt_out = init->pix_fmt;
pv->width_in = init->width;
pv->height_in = init->height;
pv->width_out = init->width;
pv->height_out = init->height;
memcpy( pv->crop, init->crop, sizeof( int[4] ) );
if( filter->settings )
{
sscanf( filter->settings, "%d:%d:%d:%d:%d:%d",
&pv->width_out, &pv->height_out,
&pv->crop[0], &pv->crop[1], &pv->crop[2], &pv->crop[3] );
}
// Set init values so the next stage in the pipline
// knows what it will be getting
init->pix_fmt = pv->pix_fmt;
init->width = pv->width_out;
init->height = pv->height_out;
memcpy( init->crop, pv->crop, sizeof( int[4] ) );
return 0;
}
static int hb_crop_scale_info( hb_filter_object_t * filter,
hb_filter_info_t * info )
{
hb_filter_private_t * pv = filter->private_data;
if( !pv )
return 0;
// Set init values so the next stage in the pipline
// knows what it will be getting
memset( info, 0, sizeof( hb_filter_info_t ) );
info->out.pix_fmt = pv->pix_fmt;
info->out.width = pv->width_out;
info->out.height = pv->height_out;
memcpy( info->out.crop, pv->crop, sizeof( int[4] ) );
int cropped_width = pv->width_in - ( pv->crop[2] + pv->crop[3] );
int cropped_height = pv->height_in - ( pv->crop[0] + pv->crop[1] );
sprintf( info->human_readable_desc,
"source: %d * %d, crop (%d/%d/%d/%d): %d * %d, scale: %d * %d",
pv->width_in, pv->height_in,
pv->crop[0], pv->crop[1], pv->crop[2], pv->crop[3],
cropped_width, cropped_height, pv->width_out, pv->height_out );
return 0;
}
static void hb_crop_scale_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if ( !pv )
{
return;
}
if ( pv->context )
{
sws_freeContext( pv->context );
}
free( pv );
filter->private_data = NULL;
}
static hb_buffer_t* crop_scale( hb_filter_private_t * pv, hb_buffer_t * in )
{
AVPicture pic_in;
AVPicture pic_out;
AVPicture pic_crop;
hb_buffer_t * out;
out = hb_video_buffer_init( pv->width_out, pv->height_out );
hb_avpicture_fill( &pic_in, in );
hb_avpicture_fill( &pic_out, out );
// Crop; this alters the pointer to the data to point to the
// correct place for cropped frame
av_picture_crop( &pic_crop, &pic_in, in->f.fmt,
pv->crop[0], pv->crop[2] );
if ( !pv->context ||
pv->width_in != in->f.width ||
pv->height_in != in->f.height ||
pv->pix_fmt != in->f.fmt )
{
// Something changed, need a new scaling context.
if( pv->context )
sws_freeContext( pv->context );
pv->context = hb_sws_get_context(
in->f.width - (pv->crop[2] + pv->crop[3]),
in->f.height - (pv->crop[0] + pv->crop[1]),
in->f.fmt,
out->f.width, out->f.height, out->f.fmt,
SWS_LANCZOS | SWS_ACCURATE_RND );
pv->width_in = in->f.width;
pv->height_in = in->f.height;
pv->pix_fmt = in->f.fmt;
}
// Scale pic_crop into pic_render according to the
// context set up above
sws_scale(pv->context,
(const uint8_t* const*)pic_crop.data,
pic_crop.linesize,
0, in->f.height - (pv->crop[0] + pv->crop[1]),
pic_out.data, pic_out.linesize);
out->s = in->s;
hb_buffer_move_subs( out, in );
return out;
}
static int hb_crop_scale_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;
if ( in->size <= 0 )
{
*buf_out = in;
*buf_in = NULL;
return HB_FILTER_DONE;
}
if ( !pv )
{
*buf_out = in;
*buf_in = NULL;
return HB_FILTER_OK;
}
// If width or height were not set, set them now based on the
// input width & height
if ( pv->width_out <= 0 || pv->height_out <= 0 )
{
pv->width_out = in->f.width - (pv->crop[2] + pv->crop[3]);
pv->height_out = in->f.height - (pv->crop[0] + pv->crop[1]);
}
if ( in->f.fmt == pv->pix_fmt_out &&
!pv->crop[0] && !pv->crop[1] && !pv->crop[2] && !pv->crop[3] &&
in->f.width == pv->width_out && in->f.height == pv->height_out )
{
*buf_out = in;
*buf_in = NULL;
return HB_FILTER_OK;
}
*buf_out = crop_scale( pv, in );
return HB_FILTER_OK;
}
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