src/main.rs

   1 extern crate nihav;
   2
   3 use std::io::SeekFrom;
   4 use std::fs::File;
   5 use std::path::Path;
   6 use nihav::io::byteio::{FileReader, ByteReader};
   7 use nihav::frame::*;
   8 use nihav::codecs::*;
   9 use nihav::demuxers::*;
  10 use nihav::detect;
  11 use std::env;
  12
  13 mod frmwriter;
  14 use frmwriter::*;
  15
  16 mod wavwriter;
  17 use wavwriter::WavWriter;
  18
  19 struct FrameOutput {
  20     prefix:     &'static str,
  21     streamno:   usize,
  22 }
  23
  24 impl FrameOutput {
  25     fn output_frame(&mut self, pkt: &NAPacket, frmref: NAFrameRef) {
  26         let frm = frmref.borrow();
  27         if frm.get_frame_type() != FrameType::Skip {
  28             let pts = if let Some(pt) = frm.get_pts() { pt } else { pkt.get_pts().unwrap() };
  29             let frmbuf = frm.get_buffer().get_vbuf().unwrap();
  30             if frmbuf.get_info().get_format().is_paletted() {
  31                 write_palppm(self.prefix, self.streamno, pts, frm);
  32             } else {
  33                 write_pgmyuv(self.prefix, self.streamno, pts, frm);
  34             }
  35         }
  36     }
  37 }
  38
  39 struct AudioOutput {
  40     wwr:    WavWriter<'static>,
  41     wrote_header: bool,
  42 }
  43
  44 impl AudioOutput {
  45     fn new(name: &String) -> Self { Self { wwr: WavWriter::new(name), wrote_header: false } }
  46     fn output_frame(&mut self, _pkt: &NAPacket, frm: NAFrameRef) {
  47         if !self.wrote_header {
  48             self.wwr.write_header(frm.borrow().get_info().as_ref().get_properties().get_audio_info().unwrap()).unwrap();
  49             self.wrote_header = true;
  50         }
  51         self.wwr.write_frame(frm.borrow().get_buffer()).unwrap();
  52     }
  53 }
  54
  55 enum Outputter {
  56     Video(FrameOutput),
  57     Audio(AudioOutput),
  58     None,
  59 }
  60
  61 fn main() {
  62     let args: Vec<_> = env::args().collect();
  63
  64     if args.len() == 1 {
  65         println!("usage: nihav-tool [-noout] [-vn] [-an] input [lastpts]");
  66         return;
  67     }
  68     let mut lastpts: Option<u64> = None;
  69     let mut cur_arg: usize = 1;
  70     let mut noout = false;
  71     let mut decode_video = true;
  72     let mut decode_audio = true;
  73
  74     while (cur_arg < args.len()) && (args[cur_arg].chars().next().unwrap() == '-') {
  75         match args[cur_arg].as_str() {
  76             "--"        => { break; },
  77             "-noout"    => { noout = true; },
  78             "-an"       => { decode_audio = false; },
  79             "-vn"       => { decode_video = false; },
  80             _           => { println!("unknown option {}", args[cur_arg]); return; },
  81         }
  82         cur_arg += 1;
  83     }
  84     let name = args[cur_arg].as_str();
  85     cur_arg += 1;
  86     if cur_arg < args.len() {
  87         lastpts = Some(u64::from_str_radix(args[cur_arg].as_str(), 10).unwrap());
  88     }
  89
  90     let path = Path::new(name);
  91     let mut file = File::open(path).unwrap();
  92     let dmx_fact;
  93     let mut fr = FileReader::new_read(&mut file);
  94     let mut br = ByteReader::new(&mut fr);
  95     let res = detect::detect_format(name, &mut br);
  96     if res.is_none() {
  97         println!("cannot detect format for {}", name);
  98         return;
  99     }
 100     let (dmx_name, _) = res.unwrap();
 101 println!("trying demuxer {} on {}", dmx_name, name);
 102     dmx_fact = find_demuxer(dmx_name).unwrap();
 103     br.seek(SeekFrom::Start(0)).unwrap();
 104     let mut dmx = create_demuxer(dmx_fact, &mut br).unwrap();
 105
 106     let mut decs: Vec<Option<Box<NADecoder>>> = Vec::new();
 107     let mut writers: Vec<Outputter> = Vec::new();
 108     for i in 0..dmx.get_num_streams() {
 109         let s = dmx.get_stream(i).unwrap();
 110         let info = s.get_info();
 111         let decfunc = find_decoder(info.get_name());
 112 println!("stream {} - {} {}", i, s, info.get_name());
 113         let mut has_out = false;
 114         if info.is_video() {
 115             if decode_video {
 116                 let mut dec = (decfunc.unwrap())();
 117                 dec.init(info).unwrap();
 118                 decs.push(Some(dec));
 119                 if !noout {
 120                     writers.push(Outputter::Video(FrameOutput{prefix: "", streamno: i}));
 121                     has_out = true;
 122                 }
 123             } else {
 124                 decs.push(None);
 125             }
 126         } else if info.is_audio() {
 127             if decode_audio {
 128                 let mut dec = (decfunc.unwrap())();
 129                 dec.init(info).unwrap();
 130                 decs.push(Some(dec));
 131                 if !noout {
 132                     let name = format!("out{:02}.wav", i);
 133                     writers.push(Outputter::Audio(AudioOutput::new(&name)));
 134                     has_out = true;
 135                 }
 136             } else {
 137                 decs.push(None);
 138             }
 139         } else {
 140             decs.push(None);
 141 panic!("decoder {} not found", info.get_name());
 142         }
 143         if !has_out {
 144             writers.push(Outputter::None);
 145         }
 146     }
 147
 148     loop {
 149         let pktres = dmx.get_frame();
 150         if let Err(e) = pktres {
 151             if e == DemuxerError::EOF { break; }
 152         }
 153         let pkt = pktres.unwrap();
 154         let streamno = pkt.get_stream().get_id() as usize;
 155         if let Some(ref mut dec) = decs[streamno] {
 156             let frm = dec.decode(&pkt).unwrap();
 157             if !noout {
 158                 match writers[streamno] {
 159                     Outputter::Video(ref mut wr) => { wr.output_frame(&pkt, frm); },
 160                     Outputter::Audio(ref mut wr) => { wr.output_frame(&pkt, frm); },
 161                     _ => {},
 162                 };
 163             }
 164         }
 165         if pkt.get_pts() != None && pkt.get_pts() >= lastpts { break; }
 166     }
 167 //panic!("end");
 168 }