+fn write_ppm(pfx: &str, strno: usize, num: u64, frm: NAFrameRef) {
+ let name = format!("assets/{}out{:02}_{:06}.ppm", pfx, strno, num);
+ let mut ofile = File::create(name).unwrap();
+ if let NABufferType::VideoPacked(ref buf) = frm.get_buffer() {
+ let (w, h) = buf.get_dimensions(0);
+ let hdr = format!("P6\n{} {}\n255\n", w, h);
+ ofile.write_all(hdr.as_bytes()).unwrap();
+ let dta = buf.get_data();
+ let stride = buf.get_stride(0);
+ let offs: [usize; 3] = [
+ buf.get_info().get_format().get_chromaton(0).unwrap().get_offset() as usize,
+ buf.get_info().get_format().get_chromaton(1).unwrap().get_offset() as usize,
+ buf.get_info().get_format().get_chromaton(2).unwrap().get_offset() as usize
+ ];
+ let step = buf.get_info().get_format().get_elem_size() as usize;
+ let mut line: Vec<u8> = Vec::with_capacity(w * 3);
+ line.resize(w * 3, 0);
+ for src in dta.chunks(stride) {
+ for x in 0..w {
+ line[x * 3 + 0] = src[x * step + offs[0]];
+ line[x * 3 + 1] = src[x * step + offs[1]];
+ line[x * 3 + 2] = src[x * step + offs[2]];
+ }
+ ofile.write_all(line.as_slice()).unwrap();
+ }
+ } else if let NABufferType::Video16(ref buf) = frm.get_buffer() {
+ let (w, h) = buf.get_dimensions(0);
+ let hdr = format!("P6\n{} {}\n255\n", w, h);
+ ofile.write_all(hdr.as_bytes()).unwrap();
+ let dta = buf.get_data();
+ let stride = buf.get_stride(0);
+ let depths: [u8; 3] = [
+ buf.get_info().get_format().get_chromaton(0).unwrap().get_depth(),
+ buf.get_info().get_format().get_chromaton(1).unwrap().get_depth(),
+ buf.get_info().get_format().get_chromaton(2).unwrap().get_depth()
+ ];
+ let masks: [u16; 3] = [
+ (1 << depths[0]) - 1,
+ (1 << depths[1]) - 1,
+ (1 << depths[2]) - 1
+ ];
+ let shifts: [u8; 3] = [
+ buf.get_info().get_format().get_chromaton(0).unwrap().get_shift(),
+ buf.get_info().get_format().get_chromaton(1).unwrap().get_shift(),
+ buf.get_info().get_format().get_chromaton(2).unwrap().get_shift()
+ ];
+ let mut line: Vec<u8> = Vec::with_capacity(w * 3);
+ line.resize(w * 3, 0);
+ for src in dta.chunks(stride) {
+ for x in 0..w {
+ let elem = src[x];
+ let r = ((elem >> shifts[0]) & masks[0]) << (8 - depths[0]);
+ let g = ((elem >> shifts[1]) & masks[1]) << (8 - depths[1]);
+ let b = ((elem >> shifts[2]) & masks[2]) << (8 - depths[2]);
+ line[x * 3 + 0] = r as u8;
+ line[x * 3 + 1] = g as u8;
+ line[x * 3 + 2] = b as u8;
+ }
+ ofile.write_all(line.as_slice()).unwrap();
+ }
+ } else {
+panic!(" unhandled buf format");
+ }
+}
+