/*!
************************************************************************
* \brief
* Write out not paired direct output fields. A second empty field is generated
* and combined into the frame buffer.
* \param fs
* FrameStore that contains a single field
* \param p_out
* Output file
************************************************************************
*/
void write_unpaired_field(FrameStore* fs, FILE *p_out)
{
StorablePicture *p;
assert (fs->is_used<3);
if(fs->is_used &1)
{
// we have a top field
// construct an empty bottom field
p = fs->top_field;
fs->bottom_field = alloc_storable_picture(BOTTOM_FIELD, p->size_x, p->size_y, p->size_x_cr, p->size_y_cr);
clear_picture(fs->bottom_field);
dpb_combine_field(fs);
write_picture (fs->frame, p_out);
fs->is_used=3;
}
if(fs->is_used &2)
{
// we have a bottom field
// construct an empty top field
p = fs->bottom_field;
fs->top_field = alloc_storable_picture(TOP_FIELD, p->size_x, p->size_y, p->size_x_cr, p->size_y_cr);
clear_picture(fs->bottom_field);
dpb_combine_field(fs);
write_picture (fs->frame, p_out);
fs->is_used=3;
}
}
/*!
************************************************************************
* \brief
* Write out not paired direct output fields. A second empty field is generated
* and combined into the frame buffer.
* \param fs
* FrameStore that contains a single field
* \param p_out
* Output file
************************************************************************
*/
void write_unpaired_field(FrameStore* fs, FILE *p_out)
{
StorablePicture *p;
assert (fs->is_used<3);
if(fs->is_used &1)
{
// we have a top field
// construct an empty bottom field
p = fs->top_field;
fs->bottom_field = alloc_storable_picture(BOTTOM_FIELD, p->size_x, 2*p->size_y, p->size_x_cr, 2*p->size_y_cr);
clear_picture(fs->bottom_field);
dpb_combine_field(fs);
write_picture (fs->frame, p_out, TOP_FIELD);
}
if(fs->is_used &2)
{
// we have a bottom field
// construct an empty top field
p = fs->bottom_field;
fs->top_field = alloc_storable_picture(TOP_FIELD, p->size_x, 2*p->size_y, p->size_x_cr, 2*p->size_y_cr);
clear_picture(fs->top_field);
fs ->top_field->frame_cropping_flag = fs->bottom_field->frame_cropping_flag;
if(fs ->top_field->frame_cropping_flag)
{
fs ->top_field->frame_cropping_rect_top_offset = fs->bottom_field->frame_cropping_rect_top_offset;
fs ->top_field->frame_cropping_rect_bottom_offset = fs->bottom_field->frame_cropping_rect_bottom_offset;
fs ->top_field->frame_cropping_rect_left_offset = fs->bottom_field->frame_cropping_rect_left_offset;
fs ->top_field->frame_cropping_rect_right_offset = fs->bottom_field->frame_cropping_rect_right_offset;
}
dpb_combine_field(fs);
write_picture (fs->frame, p_out, BOTTOM_FIELD);
}
fs->is_used=3;
}
/*!
************************************************************************
* \brief
* Directly output a picture without storing it in the DPB. Fields
* are buffered before they are written to the file.
* \param p
* Picture for output
* \param p_out
* Output file
************************************************************************
*/
void direct_output(StorablePicture *p, FILE *p_out)
{
if (p->structure==FRAME)
{
// we have a frame (or complementary field pair)
// so output it directly
flush_direct_output(p_out);
write_picture (p, p_out, FRAME);
if (p_ref)
find_snr(snr, p, p_ref);
free_storable_picture(p);
return;
}
if (p->structure == TOP_FIELD)
{
if (out_buffer->is_used &1)
flush_direct_output(p_out);
out_buffer->top_field = p;
out_buffer->is_used |= 1;
}
if (p->structure == BOTTOM_FIELD)
{
if (out_buffer->is_used &2)
flush_direct_output(p_out);
out_buffer->bottom_field = p;
out_buffer->is_used |= 2;
}
if (out_buffer->is_used == 3)
{
// we have both fields, so output them
dpb_combine_field(out_buffer);
write_picture (out_buffer->frame, p_out, FRAME);
if (p_ref)
find_snr(snr, out_buffer->frame, p_ref);
free_storable_picture(out_buffer->frame);
out_buffer->frame = NULL;
free_storable_picture(out_buffer->top_field);
out_buffer->top_field = NULL;
free_storable_picture(out_buffer->bottom_field);
out_buffer->bottom_field = NULL;
out_buffer->is_used = 0;
}
}
