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//! Simple PNM image writers for RGB and YUV images.
use std::io::prelude::*;
use std::fs::File;
use nihav_core::frame::{NABufferType, NAFrameRef, NAFrame, alloc_video_buffer};
use nihav_core::scale::*;
use nihav_core::formats::YUV420_FORMAT;
/// Writes PGMYUV for input frame.
pub fn write_pgmyuv(name: &str, frm: NAFrameRef) -> std::io::Result<()> {
if let NABufferType::None = frm.get_buffer() { return Ok(()); }
let mut ofile = File::create(name)?;
let buf = frm.get_buffer().get_vbuf().unwrap();
let is_flipped = buf.get_info().is_flipped();
let (w, h) = buf.get_dimensions(0);
let (w2, h2) = buf.get_dimensions(1);
let full_w = w2 * 2 > w;
let has_alpha = buf.get_info().get_format().has_alpha();
let mut tot_h = h + h2;
if has_alpha {
tot_h += h;
}
if full_w {
tot_h += h2;
}
let hdr = format!("P5\n{} {}\n255\n", w, tot_h);
ofile.write_all(hdr.as_bytes())?;
let dta = buf.get_data();
let ls = buf.get_stride(0);
let pad: Vec<u8> = vec![0xFF; if !full_w { (w - w2 * 2) / 2 } else { w - w2 } ];
if !is_flipped {
let ylines = dta.chunks(ls).take(h);
for line in ylines {
ofile.write_all(&line[..w])?;
}
} else {
let ylines = dta[..h * ls].chunks(ls).rev();
for line in ylines {
ofile.write_all(&line[..w])?;
}
}
let base1 = buf.get_offset(1);
let stride1 = buf.get_stride(1);
let base2 = buf.get_offset(2);
let stride2 = buf.get_stride(2);
let u = &dta[base1..][..h2*stride1];
let v = &dta[base2..][..h2*stride2];
let has_chroma = stride1 > 0 && stride2 > 0;
if !full_w && has_chroma {
if !is_flipped {
for (uline, vline) in u.chunks(stride1).zip(v.chunks(stride2)) {
ofile.write_all(&uline[..w2])?;
ofile.write_all(pad.as_slice())?;
ofile.write_all(&vline[..w2])?;
ofile.write_all(pad.as_slice())?;
}
} else {
for (uline, vline) in u.chunks(stride1).rev().zip(v.chunks(stride2).rev()) {
ofile.write_all(&uline[..w2])?;
ofile.write_all(pad.as_slice())?;
ofile.write_all(&vline[..w2])?;
ofile.write_all(pad.as_slice())?;
}
}
} else if has_chroma {
if !is_flipped {
for uline in u.chunks(stride1) {
ofile.write_all(&uline[..w2])?;
ofile.write_all(pad.as_slice())?;
}
for vline in v.chunks(stride2) {
ofile.write_all(&vline[..w2])?;
ofile.write_all(pad.as_slice())?;
}
} else {
for uline in u.chunks(stride1).rev() {
ofile.write_all(&uline[..w2])?;
ofile.write_all(pad.as_slice())?;
}
for vline in v.chunks(stride2).rev() {
ofile.write_all(&vline[..w2])?;
ofile.write_all(pad.as_slice())?;
}
}
}
if has_alpha {
let ls = buf.get_stride(3);
if !is_flipped {
let alines = dta[buf.get_offset(3)..].chunks(ls).take(h);
for line in alines {
ofile.write_all(&line[..w])?;
}
} else {
let alines = dta[buf.get_offset(3)..].chunks(ls).take(h).rev();
for line in alines {
ofile.write_all(&line[..w])?;
}
}
}
Ok(())
}
/// Writes output PPM for input paletted input frame.
pub fn write_palppm(name: &str, frm: NAFrameRef) -> std::io::Result<()> {
if let NABufferType::None = frm.get_buffer() { return Ok(()); }
let mut ofile = File::create(name)?;
let buf = frm.get_buffer().get_vbuf().unwrap();
let (w, h) = buf.get_dimensions(0);
let paloff = buf.get_offset(1);
let hdr = format!("P6\n{} {}\n255\n", w, h);
ofile.write_all(hdr.as_bytes())?;
let dta = buf.get_data();
let ls = 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 flipped = buf.get_info().is_flipped();
let mut idx = if !flipped { 0 } else { ls * h };
let mut line: Vec<u8> = vec![0; w * 3];
for _ in 0..h {
if flipped {
idx -= ls;
}
let src = &dta[idx..(idx+w)];
for x in 0..w {
let pix = src[x] as usize;
line[x * 3 + 0] = dta[paloff + pix * 3 + offs[0]];
line[x * 3 + 1] = dta[paloff + pix * 3 + offs[1]];
line[x * 3 + 2] = dta[paloff + pix * 3 + offs[2]];
}
ofile.write_all(line.as_slice())?;
if !flipped {
idx += ls;
}
}
Ok(())
}
/// Writes PPM file for RGB input.
pub fn write_rgbppm(name: &str, frm: NAFrameRef) -> std::io::Result<()> {
if let NABufferType::None = frm.get_buffer() { return Ok(()); }
let mut ofile = File::create(name)?;
let info = frm.get_buffer().get_video_info().unwrap();
let flipped = info.is_flipped();
let buffer = frm.get_buffer();
if let Some(ref buf) = buffer.get_vbuf() {
let (w, h) = buf.get_dimensions(0);
let hdr = format!("P6\n{} {}\n255\n", w, h);
ofile.write_all(hdr.as_bytes())?;
let dta = buf.get_data();
let stride = buf.get_stride(0);
let offs: [usize; 3] = [
info.get_format().get_chromaton(0).unwrap().get_offset() as usize,
info.get_format().get_chromaton(1).unwrap().get_offset() as usize,
info.get_format().get_chromaton(2).unwrap().get_offset() as usize
];
let step = info.get_format().get_elem_size() as usize;
let mut line: Vec<u8> = vec![0; w * 3];
if !flipped {
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())?;
}
} else {
for src in dta[..stride * h].chunks(stride).rev() {
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())?;
}
}
} else if let NABufferType::Video16(ref buf) = buffer {
let (w, h) = buf.get_dimensions(0);
let hdr = format!("P6\n{} {}\n255\n", w, h);
ofile.write_all(hdr.as_bytes())?;
let dta = buf.get_data();
let stride = buf.get_stride(0);
let depths: [u8; 3] = [
info.get_format().get_chromaton(0).unwrap().get_depth(),
info.get_format().get_chromaton(1).unwrap().get_depth(),
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] = [
info.get_format().get_chromaton(0).unwrap().get_shift(),
info.get_format().get_chromaton(1).unwrap().get_shift(),
info.get_format().get_chromaton(2).unwrap().get_shift()
];
let mut line: Vec<u8> = vec![0; w * 3];
if !flipped {
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())?;
}
} else {
for src in dta[..h * stride].chunks(stride).rev() {
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())?;
}
}
} else {
panic!(" unhandled buf format");
}
Ok(())
}
/// Writes PNM file with a format depending on input format.
pub fn write_pnm(pfx: &str, strno: usize, num: u64, frm: NAFrameRef) -> std::io::Result<()> {
if let NABufferType::None = frm.get_buffer() { return Ok(()); }
let vinfo = frm.get_buffer().get_video_info().unwrap();
if vinfo.get_format().is_paletted() {
let name = format!("{}{:02}_{:06}.ppm", pfx, strno, num);
write_palppm(name.as_str(), frm)
} else if vinfo.get_format().get_model().is_yuv() {
let name = format!("{}{:02}_{:06}.pgm", pfx, strno, num);
if vinfo.get_format().is_unpacked() {
write_pgmyuv(name.as_str(), frm)
} else {
let mut dst_vinfo = vinfo;
dst_vinfo.format = YUV420_FORMAT;
let mut cvt_buf = alloc_video_buffer(dst_vinfo, 2).unwrap();
let buf = frm.get_buffer();
let ifmt = get_scale_fmt_from_pic(&buf);
let ofmt = get_scale_fmt_from_pic(&cvt_buf);
let mut scaler = NAScale::new(ifmt, ofmt).unwrap();
scaler.convert(&buf, &mut cvt_buf).unwrap();
let frm = NAFrame::new(frm.get_time_information(), frm.frame_type, frm.key, frm.get_info(), cvt_buf);
write_pgmyuv(name.as_str(), frm.into_ref())
}
} else if vinfo.get_format().get_model().is_rgb() {
let name = format!("{}{:02}_{:06}.ppm", pfx, strno, num);
write_rgbppm(name.as_str(), frm)
} else {
panic!(" unknown format");
}
}
|
