src/demuxers/mod.rs

   1 pub mod gdv;
   2
   3 use std::fmt;
   4 use std::rc::Rc;
   5 use frame::*;
   6 //use std::collections::HashMap;
   7 use io::byteio::*;
   8
   9 #[derive(Debug,Clone,Copy)]
  10 #[allow(dead_code)]
  11 pub enum StreamType {
  12     Video,
  13     Audio,
  14     Subtitles,
  15     Data,
  16 }
  17
  18 impl fmt::Display for StreamType {
  19     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  20         match *self {
  21             StreamType::Video => write!(f, "Video"),
  22             StreamType::Audio => write!(f, "Audio"),
  23             StreamType::Subtitles => write!(f, "Subtitles"),
  24             StreamType::Data => write!(f, "Data"),
  25         }
  26     }
  27 }
  28
  29
  30 #[allow(dead_code)]
  31 #[derive(Clone)]
  32 pub struct NAStream {
  33     media_type:     StreamType,
  34     id:             u32,
  35     num:            usize,
  36     info:           Rc<NACodecInfo>,
  37 }
  38
  39 impl NAStream {
  40     pub fn new(mt: StreamType, id: u32, info: NACodecInfo) -> Self {
  41         NAStream { media_type: mt, id: id, num: 0, info: Rc::new(info) }
  42     }
  43     pub fn get_id(&self) -> u32 { self.id }
  44     pub fn get_num(&self) -> usize { self.num }
  45     pub fn set_num(&mut self, num: usize) { self.num = num; }
  46     pub fn get_info(&self) -> Rc<NACodecInfo> { self.info.clone() }
  47 }
  48
  49 impl fmt::Display for NAStream {
  50     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  51         write!(f, "({}#{})", self.media_type, self.id)
  52     }
  53 }
  54
  55 #[allow(dead_code)]
  56 pub struct NAPacket {
  57     stream:         Rc<NAStream>,
  58     pts:            Option<u64>,
  59     dts:            Option<u64>,
  60     duration:       Option<u64>,
  61     buffer:         Rc<Vec<u8>>,
  62     keyframe:       bool,
  63 //    options:        HashMap<String, NAValue<'a>>,
  64 }
  65
  66 impl NAPacket {
  67     pub fn new(str: Rc<NAStream>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, kf: bool, vec: Vec<u8>) -> Self {
  68 //        let mut vec: Vec<u8> = Vec::new();
  69 //        vec.resize(size, 0);
  70         NAPacket { stream: str, pts: pts, dts: dts, duration: dur, keyframe: kf, buffer: Rc::new(vec) }
  71     }
  72     pub fn get_stream(&self) -> Rc<NAStream> { self.stream.clone() }
  73     pub fn get_pts(&self) -> Option<u64> { self.pts }
  74     pub fn get_buffer(&self) -> Rc<Vec<u8>> { self.buffer.clone() }
  75 }
  76
  77 impl fmt::Display for NAPacket {
  78     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  79         let mut foo = format!("[pkt for {} size {}", self.stream, self.buffer.len());
  80         if let Some(pts) = self.pts { foo = format!("{} pts {}", foo, pts); }
  81         if let Some(dts) = self.dts { foo = format!("{} dts {}", foo, dts); }
  82         if let Some(dur) = self.duration { foo = format!("{} duration {}", foo, dur); }
  83         if self.keyframe { foo = format!("{} kf", foo); }
  84         foo = foo + "]";
  85         write!(f, "{}", foo)
  86     }
  87 }
  88
  89 #[derive(Debug)]
  90 #[allow(dead_code)]
  91 pub enum DemuxerError {
  92     EOF,
  93     NoSuchInput,
  94     InvalidData,
  95     IOError,
  96     NotImplemented,
  97     MemoryError,
  98 }
  99
 100 type DemuxerResult<T> = Result<T, DemuxerError>;
 101
 102 pub trait Demux<'a> {
 103     fn open(&mut self) -> DemuxerResult<()>;
 104     fn get_frame(&mut self) -> DemuxerResult<NAPacket>;
 105     fn seek(&mut self, time: u64) -> DemuxerResult<()>;
 106 }
 107
 108 pub trait NAPacketReader {
 109     fn read_packet(&mut self, str: Rc<NAStream>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
 110     fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
 111 }
 112
 113 impl<'a> NAPacketReader for ByteReader<'a> {
 114     fn read_packet(&mut self, str: Rc<NAStream>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
 115         let mut buf: Vec<u8> = Vec::with_capacity(size);
 116         if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
 117         buf.resize(size, 0);
 118         let res = self.read_buf(buf.as_mut_slice());
 119         if let Err(_) = res { return Err(DemuxerError::IOError); }
 120         if res.unwrap() < buf.len() { return Err(DemuxerError::IOError); }
 121         let pkt = NAPacket::new(str, pts, dts, dur, kf, buf);
 122         Ok(pkt)
 123     }
 124     fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
 125         let mut refbuf = pkt.get_buffer();
 126         let mut buf = Rc::make_mut(&mut refbuf);
 127         let res = self.read_buf(buf.as_mut_slice());
 128         if let Err(_) = res { return Err(DemuxerError::IOError); }
 129         if res.unwrap() < buf.len() { return Err(DemuxerError::IOError); }
 130         Ok(())
 131     }
 132 }
 133
 134 pub struct Demuxer {
 135     streams: Vec<Rc<NAStream>>,
 136 }
 137
 138 impl Demuxer {
 139     pub fn new() -> Self { Demuxer { streams: Vec::new() } }
 140     pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> {
 141         let stream_num = self.streams.len();
 142         let mut str = stream.clone();
 143         str.set_num(stream_num);
 144         self.streams.push(Rc::new(str));
 145         Some(stream_num)
 146     }
 147     pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> {
 148         if idx < self.streams.len() {
 149             Some(self.streams[idx].clone())
 150         } else {
 151             None
 152         }
 153     }
 154     pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> {
 155         for i in 0..self.streams.len() {
 156             if self.streams[i].get_id() == id {
 157                 return Some(self.streams[i].clone());
 158             }
 159         }
 160         None
 161     }
 162 }
 163
 164 impl From<ByteIOError> for DemuxerError {
 165     fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
 166 }
 167
 168 //impl NADemuxerBuilder {
 169 //    #[allow(unused_variables)]
 170 //    pub fn create_demuxer(name: &str, url: &str) -> DemuxerResult<Box<NADemuxer<'static>>> {
 171 //        unimplemented!()
 172 //    }
 173 //}