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 #[derive(Clone,Copy,PartialEq)]
  20 enum NumberMode {
  21     Counter,
  22     PktPTS,
  23     FrmPTS,
  24 }
  25
  26 struct FrameOutput {
  27     prefix:     &'static str,
  28     streamno:   usize,
  29     frameno:    u64,
  30     nmode:      NumberMode,
  31 }
  32
  33 impl FrameOutput {
  34     fn output_frame(&mut self, pkt: &NAPacket, frmref: NAFrameRef) {
  35         let frm = frmref.borrow();
  36         if frm.get_frame_type() != FrameType::Skip {
  37             let pts = match self.nmode {
  38                     NumberMode::Counter => { self.frameno },
  39                     NumberMode::PktPTS  => { pkt.get_pts().unwrap() },
  40                     NumberMode::FrmPTS  => { if let Some(pt) = frm.get_pts() { pt } else { pkt.get_pts().unwrap() } },
  41                 };
  42             let frmbuf = frm.get_buffer().get_vbuf().unwrap();
  43             if frmbuf.get_info().get_format().is_paletted() {
  44                 write_palppm(self.prefix, self.streamno, pts, frm);
  45             } else {
  46                 write_pgmyuv(self.prefix, self.streamno, pts, frm);
  47             }
  48         }
  49         self.frameno += 1;
  50     }
  51 }
  52
  53 struct AudioOutput {
  54     wwr:    WavWriter<'static>,
  55     wrote_header: bool,
  56 }
  57
  58 impl AudioOutput {
  59     fn new(name: &String) -> Self { Self { wwr: WavWriter::new(name), wrote_header: false } }
  60     fn output_frame(&mut self, _pkt: &NAPacket, frm: NAFrameRef) {
  61         if !self.wrote_header {
  62             self.wwr.write_header(frm.borrow().get_info().as_ref().get_properties().get_audio_info().unwrap()).unwrap();
  63             self.wrote_header = true;
  64         }
  65         self.wwr.write_frame(frm.borrow().get_buffer()).unwrap();
  66     }
  67 }
  68
  69 enum Outputter {
  70     Video(FrameOutput),
  71     Audio(AudioOutput),
  72     None,
  73 }
  74
  75 fn main() {
  76     let args: Vec<_> = env::args().collect();
  77
  78     if args.len() == 1 {
  79         println!("usage: nihav-tool [-noout] [-vn] [-an] input [lastpts]");
  80         return;
  81     }
  82     let mut lastpts: Option<u64> = None;
  83     let mut cur_arg: usize = 1;
  84     let mut noout = false;
  85     let mut decode_video = true;
  86     let mut decode_audio = true;
  87     let mut nmode = NumberMode::FrmPTS;
  88
  89     while (cur_arg < args.len()) && (args[cur_arg].chars().next().unwrap() == '-') {
  90         match args[cur_arg].as_str() {
  91             "--"        => { break; },
  92             "-noout"    => { noout = true; },
  93             "-an"       => { decode_audio = false; },
  94             "-vn"       => { decode_video = false; },
  95             "-nm=count"  => { nmode = NumberMode::Counter; },
  96             "-nm=pktpts" => { nmode = NumberMode::PktPTS; },
  97             "-nm=frmpts" => { nmode = NumberMode::FrmPTS; },
  98             _           => { println!("unknown option {}", args[cur_arg]); return; },
  99         }
 100         cur_arg += 1;
 101     }
 102     let name = args[cur_arg].as_str();
 103     cur_arg += 1;
 104     if cur_arg < args.len() {
 105         lastpts = Some(u64::from_str_radix(args[cur_arg].as_str(), 10).unwrap());
 106     }
 107
 108     let path = Path::new(name);
 109     let mut file = File::open(path).unwrap();
 110     let dmx_fact;
 111     let mut fr = FileReader::new_read(&mut file);
 112     let mut br = ByteReader::new(&mut fr);
 113     let res = detect::detect_format(name, &mut br);
 114     if res.is_none() {
 115         println!("cannot detect format for {}", name);
 116         return;
 117     }
 118     let (dmx_name, _) = res.unwrap();
 119 println!("trying demuxer {} on {}", dmx_name, name);
 120     dmx_fact = find_demuxer(dmx_name).unwrap();
 121     br.seek(SeekFrom::Start(0)).unwrap();
 122     let mut dmx = create_demuxer(dmx_fact, &mut br).unwrap();
 123
 124     let mut decs: Vec<Option<Box<NADecoder>>> = Vec::new();
 125     let mut writers: Vec<Outputter> = Vec::new();
 126     for i in 0..dmx.get_num_streams() {
 127         let s = dmx.get_stream(i).unwrap();
 128         let info = s.get_info();
 129         let decfunc = find_decoder(info.get_name());
 130 println!("stream {} - {} {}", i, s, info.get_name());
 131         let mut has_out = false;
 132         if info.is_video() {
 133             if decode_video {
 134                 if decfunc.is_none() {
 135                     println!("no video decoder found!");
 136                     return;
 137                 }
 138                 let mut dec = (decfunc.unwrap())();
 139                 dec.init(info).unwrap();
 140                 decs.push(Some(dec));
 141                 if !noout {
 142                     writers.push(Outputter::Video(FrameOutput{prefix: "", streamno: i, frameno: 1, nmode: nmode}));
 143                     has_out = true;
 144                 }
 145             } else {
 146                 decs.push(None);
 147             }
 148         } else if info.is_audio() {
 149             if decode_audio {
 150                 if decfunc.is_none() {
 151                     println!("no audio decoder found!");
 152                     return;
 153                 }
 154                 let mut dec = (decfunc.unwrap())();
 155                 dec.init(info).unwrap();
 156                 decs.push(Some(dec));
 157                 if !noout {
 158                     let name = format!("out{:02}.wav", i);
 159                     writers.push(Outputter::Audio(AudioOutput::new(&name)));
 160                     has_out = true;
 161                 }
 162             } else {
 163                 decs.push(None);
 164             }
 165         } else {
 166             decs.push(None);
 167 panic!("decoder {} not found", info.get_name());
 168         }
 169         if !has_out {
 170             writers.push(Outputter::None);
 171         }
 172     }
 173
 174     loop {
 175         let pktres = dmx.get_frame();
 176         if let Err(e) = pktres {
 177             if e == DemuxerError::EOF { break; }
 178         }
 179         let pkt = pktres.unwrap();
 180         let streamno = pkt.get_stream().get_id() as usize;
 181         if let Some(ref mut dec) = decs[streamno] {
 182             let frm = dec.decode(&pkt).unwrap();
 183             if !noout {
 184                 match writers[streamno] {
 185                     Outputter::Video(ref mut wr) => { wr.output_frame(&pkt, frm); },
 186                     Outputter::Audio(ref mut wr) => { wr.output_frame(&pkt, frm); },
 187                     _ => {},
 188                 };
 189             }
 190         }
 191         if pkt.get_pts() != None && lastpts.is_some() && pkt.get_pts() >= lastpts { break; }
 192     }
 193 //panic!("end");
 194 }