nihav-codec-support/src/imgwrite/mod.rs

   1 //! Simple PNM image writers for RGB and YUV images.
   2 use std::io::prelude::*;
   3 use std::fs::File;
   4 use nihav_core::frame::{NABufferType, NAFrameRef};
   5
   6 /// Writes PGMYUV for input frame.
   7 pub fn write_pgmyuv(name: &str, frm: NAFrameRef) -> std::io::Result<()> {
   8     if let NABufferType::None = frm.get_buffer() { return Ok(()); }
   9     let mut ofile = File::create(name)?;
  10     let buf = frm.get_buffer().get_vbuf().unwrap();
  11     let is_flipped = buf.get_info().is_flipped();
  12     let (w, h) = buf.get_dimensions(0);
  13     let (w2, h2) = buf.get_dimensions(1);
  14     let full_w = w2 * 2 > w;
  15     let has_alpha = buf.get_info().get_format().has_alpha();
  16     let mut tot_h = h + h2;
  17     if has_alpha {
  18         tot_h += h;
  19     }
  20     if full_w {
  21         tot_h += h2;
  22     }
  23     let hdr = format!("P5\n{} {}\n255\n", w, tot_h);
  24     ofile.write_all(hdr.as_bytes())?;
  25     let dta = buf.get_data();
  26     let ls = buf.get_stride(0);
  27     let pad: Vec<u8> = vec![0xFF; if !full_w { (w - w2 * 2) / 2 } else { w - w2 } ];
  28     if !is_flipped {
  29         let ylines = dta.chunks(ls).take(h);
  30         for line in ylines {
  31             ofile.write_all(&line[..w])?;
  32         }
  33     } else {
  34         let ylines = dta[..h * ls].chunks(ls).rev();
  35         for line in ylines {
  36             ofile.write_all(&line[..w])?;
  37         }
  38     }
  39     let base1 = buf.get_offset(1);
  40     let stride1 = buf.get_stride(1);
  41     let base2 = buf.get_offset(2);
  42     let stride2 = buf.get_stride(2);
  43     let u = &dta[base1..][..h2*stride1];
  44     let v = &dta[base2..][..h2*stride2];
  45     let has_chroma = stride1 > 0 && stride2 > 0;
  46     if !full_w && has_chroma {
  47         if !is_flipped {
  48             for (uline, vline) in u.chunks(stride1).zip(v.chunks(stride2)) {
  49                 ofile.write_all(&uline[..w2])?;
  50                 ofile.write_all(pad.as_slice())?;
  51
  52                 ofile.write_all(&vline[..w2])?;
  53                 ofile.write_all(pad.as_slice())?;
  54             }
  55         } else {
  56             for (uline, vline) in u.chunks(stride1).rev().zip(v.chunks(stride2).rev()) {
  57                 ofile.write_all(&uline[..w2])?;
  58                 ofile.write_all(pad.as_slice())?;
  59
  60                 ofile.write_all(&vline[..w2])?;
  61                 ofile.write_all(pad.as_slice())?;
  62             }
  63         }
  64     } else if has_chroma {
  65         if !is_flipped {
  66             for uline in u.chunks(stride1) {
  67                 ofile.write_all(&uline[..w2])?;
  68                 ofile.write_all(pad.as_slice())?;
  69             }
  70             for vline in v.chunks(stride2) {
  71                 ofile.write_all(&vline[..w2])?;
  72                 ofile.write_all(pad.as_slice())?;
  73             }
  74         } else {
  75             for uline in u.chunks(stride1).rev() {
  76                 ofile.write_all(&uline[..w2])?;
  77                 ofile.write_all(pad.as_slice())?;
  78             }
  79             for vline in v.chunks(stride2).rev() {
  80                 ofile.write_all(&vline[..w2])?;
  81                 ofile.write_all(pad.as_slice())?;
  82             }
  83         }
  84     }
  85     if has_alpha {
  86         let ls = buf.get_stride(3);
  87         let mut idx = buf.get_offset(3);
  88         let mut idx2 = idx + w;
  89         for _ in 0..h {
  90             let line = &dta[idx..idx2];
  91             ofile.write_all(line)?;
  92             idx  += ls;
  93             idx2 += ls;
  94         }
  95     }
  96     Ok(())
  97 }
  98
  99 /// Writes output PPM for input paletted input frame.
 100 pub fn write_palppm(name: &str, frm: NAFrameRef) -> std::io::Result<()> {
 101     if let NABufferType::None = frm.get_buffer() { return Ok(()); }
 102     let mut ofile = File::create(name)?;
 103     let buf = frm.get_buffer().get_vbuf().unwrap();
 104     let (w, h) = buf.get_dimensions(0);
 105     let paloff = buf.get_offset(1);
 106     let hdr = format!("P6\n{} {}\n255\n", w, h);
 107     ofile.write_all(hdr.as_bytes())?;
 108     let dta = buf.get_data();
 109     let ls = buf.get_stride(0);
 110     let offs: [usize; 3] = [
 111             buf.get_info().get_format().get_chromaton(0).unwrap().get_offset() as usize,
 112             buf.get_info().get_format().get_chromaton(1).unwrap().get_offset() as usize,
 113             buf.get_info().get_format().get_chromaton(2).unwrap().get_offset() as usize
 114         ];
 115     let flipped = buf.get_info().is_flipped();
 116     let mut idx  = if !flipped { 0 } else { ls * h };
 117     let mut line: Vec<u8> = vec![0; w * 3];
 118     for _ in 0..h {
 119         if flipped {
 120             idx -= ls;
 121         }
 122         let src = &dta[idx..(idx+w)];
 123         for x in 0..w {
 124             let pix = src[x] as usize;
 125             line[x * 3 + 0] = dta[paloff + pix * 3 + offs[0]];
 126             line[x * 3 + 1] = dta[paloff + pix * 3 + offs[1]];
 127             line[x * 3 + 2] = dta[paloff + pix * 3 + offs[2]];
 128         }
 129         ofile.write_all(line.as_slice())?;
 130         if !flipped {
 131             idx += ls;
 132         }
 133     }
 134     Ok(())
 135 }
 136
 137 /// Writes PPM file for RGB input.
 138 pub fn write_rgbppm(name: &str, frm: NAFrameRef) -> std::io::Result<()> {
 139     if let NABufferType::None = frm.get_buffer() { return Ok(()); }
 140     let mut ofile = File::create(name)?;
 141     let info = frm.get_buffer().get_video_info().unwrap();
 142     let flipped = info.is_flipped();
 143     let buffer = frm.get_buffer();
 144     if let Some(ref buf) = buffer.get_vbuf() {
 145         let (w, h) = buf.get_dimensions(0);
 146         let hdr = format!("P6\n{} {}\n255\n", w, h);
 147         ofile.write_all(hdr.as_bytes())?;
 148         let dta = buf.get_data();
 149         let stride = buf.get_stride(0);
 150         let offs: [usize; 3] = [
 151                 info.get_format().get_chromaton(0).unwrap().get_offset() as usize,
 152                 info.get_format().get_chromaton(1).unwrap().get_offset() as usize,
 153                 info.get_format().get_chromaton(2).unwrap().get_offset() as usize
 154             ];
 155         let step = info.get_format().get_elem_size() as usize;
 156         let mut line: Vec<u8> = vec![0; w * 3];
 157         if !flipped {
 158             for src in dta.chunks(stride) {
 159                 for x in 0..w {
 160                     line[x * 3 + 0] = src[x * step + offs[0]];
 161                     line[x * 3 + 1] = src[x * step + offs[1]];
 162                     line[x * 3 + 2] = src[x * step + offs[2]];
 163                 }
 164                 ofile.write_all(line.as_slice())?;
 165             }
 166         } else {
 167             for src in dta[..stride * h].chunks(stride).rev() {
 168                 for x in 0..w {
 169                     line[x * 3 + 0] = src[x * step + offs[0]];
 170                     line[x * 3 + 1] = src[x * step + offs[1]];
 171                     line[x * 3 + 2] = src[x * step + offs[2]];
 172                 }
 173                 ofile.write_all(line.as_slice())?;
 174             }
 175         }
 176     } else if let NABufferType::Video16(ref buf) = buffer {
 177         let (w, h) = buf.get_dimensions(0);
 178         let hdr = format!("P6\n{} {}\n255\n", w, h);
 179         ofile.write_all(hdr.as_bytes())?;
 180         let dta = buf.get_data();
 181         let stride = buf.get_stride(0);
 182         let depths: [u8; 3] = [
 183                 info.get_format().get_chromaton(0).unwrap().get_depth(),
 184                 info.get_format().get_chromaton(1).unwrap().get_depth(),
 185                 info.get_format().get_chromaton(2).unwrap().get_depth()
 186             ];
 187         let masks: [u16; 3] = [
 188                 (1 << depths[0]) - 1,
 189                 (1 << depths[1]) - 1,
 190                 (1 << depths[2]) - 1
 191             ];
 192         let shifts: [u8; 3] = [
 193                 info.get_format().get_chromaton(0).unwrap().get_shift(),
 194                 info.get_format().get_chromaton(1).unwrap().get_shift(),
 195                 info.get_format().get_chromaton(2).unwrap().get_shift()
 196             ];
 197         let mut line: Vec<u8> = vec![0; w * 3];
 198         if !flipped {
 199             for src in dta.chunks(stride) {
 200                 for x in 0..w {
 201                     let elem = src[x];
 202                     let r = ((elem >> shifts[0]) & masks[0]) << (8 - depths[0]);
 203                     let g = ((elem >> shifts[1]) & masks[1]) << (8 - depths[1]);
 204                     let b = ((elem >> shifts[2]) & masks[2]) << (8 - depths[2]);
 205                     line[x * 3 + 0] = r as u8;
 206                     line[x * 3 + 1] = g as u8;
 207                     line[x * 3 + 2] = b as u8;
 208                 }
 209                 ofile.write_all(line.as_slice())?;
 210             }
 211         } else {
 212             for src in dta[..h * stride].chunks(stride).rev() {
 213                 for x in 0..w {
 214                     let elem = src[x];
 215                     let r = ((elem >> shifts[0]) & masks[0]) << (8 - depths[0]);
 216                     let g = ((elem >> shifts[1]) & masks[1]) << (8 - depths[1]);
 217                     let b = ((elem >> shifts[2]) & masks[2]) << (8 - depths[2]);
 218                     line[x * 3 + 0] = r as u8;
 219                     line[x * 3 + 1] = g as u8;
 220                     line[x * 3 + 2] = b as u8;
 221                 }
 222                 ofile.write_all(line.as_slice())?;
 223             }
 224         }
 225     } else {
 226 panic!(" unhandled buf format");
 227     }
 228     Ok(())
 229 }
 230
 231 /// Writes PNM file with a format depending on input format.
 232 pub fn write_pnm(pfx: &str, strno: usize, num: u64, frm: NAFrameRef) -> std::io::Result<()> {
 233     if let NABufferType::None = frm.get_buffer() { return Ok(()); }
 234
 235     let vinfo = frm.get_buffer().get_video_info().unwrap();
 236     if vinfo.get_format().is_paletted() {
 237         let name = format!("{}{:02}_{:06}.ppm", pfx, strno, num);
 238         write_palppm(name.as_str(), frm)
 239     } else if vinfo.get_format().get_model().is_yuv() {
 240         let name = format!("{}{:02}_{:06}.pgm", pfx, strno, num);
 241         write_pgmyuv(name.as_str(), frm)
 242     } else if vinfo.get_format().get_model().is_rgb() {
 243         let name = format!("{}{:02}_{:06}.ppm", pfx, strno, num);
 244         write_rgbppm(name.as_str(), frm)
 245     } else {
 246 panic!(" unknown format");
 247     }
 248 }
 249