static int
get_buffer_size (GstSchroDec *schro_dec)
{
int size;
int width = schro_dec->width;
int height = schro_dec->height;
switch (schro_dec->fourcc) {
case GST_MAKE_FOURCC('I','4','2','0'):
size = ROUND_UP_POW2(width,2) * ROUND_UP_POW2(height,1);
size += 2 * ROUND_UP_POW2(ROUND_UP_SHIFT(width,1),2) *
ROUND_UP_SHIFT(height,1);
break;
case GST_MAKE_FOURCC('Y','U','Y','2'):
size = ROUND_UP_POW2(width,2) * 2 * height;
break;
case GST_MAKE_FOURCC('A','Y','U','V'):
size = width * 4 * height;
break;
default:
g_assert_not_reached();
break;
}
return size;
}
void
schro_encoder_frame_downsample (SchroEncoderFrame *frame)
{
int i;
SCHRO_DEBUG("downsampling frame %d", frame->frame_number);
for(i=0;i<5;i++){
frame->downsampled_frames[i] =
schro_frame_new_and_alloc (NULL, frame->filtered_frame->format,
ROUND_UP_SHIFT(frame->filtered_frame->width, i+1),
ROUND_UP_SHIFT(frame->filtered_frame->height, i+1));
}
schro_frame_downsample (frame->downsampled_frames[0],
frame->filtered_frame);
schro_frame_downsample (frame->downsampled_frames[1],
frame->downsampled_frames[0]);
schro_frame_downsample (frame->downsampled_frames[2],
frame->downsampled_frames[1]);
schro_frame_downsample (frame->downsampled_frames[3],
frame->downsampled_frames[2]);
schro_frame_downsample (frame->downsampled_frames[4],
frame->downsampled_frames[3]);
}
