src/demuxers/mod.rs

   1 #[cfg(feature="demuxer_gdv")]
   2 pub mod gdv;
   3 #[cfg(feature="demuxer_avi")]
   4 pub mod avi;
   5
   6 use std::fmt;
   7 use std::rc::Rc;
   8 use frame::*;
   9 use std::collections::HashMap;
  10 use io::byteio::*;
  11
  12 #[derive(Debug,Clone,Copy)]
  13 #[allow(dead_code)]
  14 pub enum StreamType {
  15     Video,
  16     Audio,
  17     Subtitles,
  18     Data,
  19     None,
  20 }
  21
  22 impl fmt::Display for StreamType {
  23     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  24         match *self {
  25             StreamType::Video => write!(f, "Video"),
  26             StreamType::Audio => write!(f, "Audio"),
  27             StreamType::Subtitles => write!(f, "Subtitles"),
  28             StreamType::Data => write!(f, "Data"),
  29             StreamType::None => write!(f, "-"),
  30         }
  31     }
  32 }
  33
  34
  35 #[allow(dead_code)]
  36 #[derive(Clone)]
  37 pub struct NAStream {
  38     media_type:     StreamType,
  39     id:             u32,
  40     num:            usize,
  41     info:           Rc<NACodecInfo>,
  42 }
  43
  44 impl NAStream {
  45     pub fn new(mt: StreamType, id: u32, info: NACodecInfo) -> Self {
  46         NAStream { media_type: mt, id: id, num: 0, info: Rc::new(info) }
  47     }
  48     pub fn get_id(&self) -> u32 { self.id }
  49     pub fn get_num(&self) -> usize { self.num }
  50     pub fn set_num(&mut self, num: usize) { self.num = num; }
  51     pub fn get_info(&self) -> Rc<NACodecInfo> { self.info.clone() }
  52 }
  53
  54 impl fmt::Display for NAStream {
  55     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  56         write!(f, "({}#{} - {})", self.media_type, self.id, self.info.get_properties())
  57     }
  58 }
  59
  60 #[allow(dead_code)]
  61 pub struct NAPacket {
  62     stream:         Rc<NAStream>,
  63     pts:            Option<u64>,
  64     dts:            Option<u64>,
  65     duration:       Option<u64>,
  66     buffer:         Rc<Vec<u8>>,
  67     keyframe:       bool,
  68 //    options:        HashMap<String, NAValue<'a>>,
  69 }
  70
  71 impl NAPacket {
  72     pub fn new(str: Rc<NAStream>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, kf: bool, vec: Vec<u8>) -> Self {
  73 //        let mut vec: Vec<u8> = Vec::new();
  74 //        vec.resize(size, 0);
  75         NAPacket { stream: str, pts: pts, dts: dts, duration: dur, keyframe: kf, buffer: Rc::new(vec) }
  76     }
  77     pub fn get_stream(&self) -> Rc<NAStream> { self.stream.clone() }
  78     pub fn get_pts(&self) -> Option<u64> { self.pts }
  79     pub fn get_dts(&self) -> Option<u64> { self.dts }
  80     pub fn get_duration(&self) -> Option<u64> { self.duration }
  81     pub fn is_keyframe(&self) -> bool { self.keyframe }
  82     pub fn get_buffer(&self) -> Rc<Vec<u8>> { self.buffer.clone() }
  83 }
  84
  85 impl Drop for NAPacket {
  86     fn drop(&mut self) {}
  87 }
  88
  89 impl fmt::Display for NAPacket {
  90     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  91         let mut foo = format!("[pkt for {} size {}", self.stream, self.buffer.len());
  92         if let Some(pts) = self.pts { foo = format!("{} pts {}", foo, pts); }
  93         if let Some(dts) = self.dts { foo = format!("{} dts {}", foo, dts); }
  94         if let Some(dur) = self.duration { foo = format!("{} duration {}", foo, dur); }
  95         if self.keyframe { foo = format!("{} kf", foo); }
  96         foo = foo + "]";
  97         write!(f, "{}", foo)
  98     }
  99 }
 100
 101 #[derive(Debug)]
 102 #[allow(dead_code)]
 103 pub enum DemuxerError {
 104     EOF,
 105     NoSuchInput,
 106     InvalidData,
 107     IOError,
 108     NotImplemented,
 109     MemoryError,
 110 }
 111
 112 type DemuxerResult<T> = Result<T, DemuxerError>;
 113
 114 pub trait Demux<'a> {
 115     fn open(&mut self) -> DemuxerResult<()>;
 116     fn get_num_streams(&self) -> usize;
 117     fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>>;
 118     fn get_frame(&mut self) -> DemuxerResult<NAPacket>;
 119     fn seek(&mut self, time: u64) -> DemuxerResult<()>;
 120 }
 121
 122 pub trait NAPacketReader {
 123     fn read_packet(&mut self, str: Rc<NAStream>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
 124     fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
 125 }
 126
 127 impl<'a> NAPacketReader for ByteReader<'a> {
 128     fn read_packet(&mut self, str: Rc<NAStream>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
 129         let mut buf: Vec<u8> = Vec::with_capacity(size);
 130         if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
 131         buf.resize(size, 0);
 132         let res = self.read_buf(buf.as_mut_slice());
 133         if let Err(_) = res { return Err(DemuxerError::IOError); }
 134         let pkt = NAPacket::new(str, pts, dts, dur, kf, buf);
 135         Ok(pkt)
 136     }
 137     fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
 138         let mut refbuf = pkt.get_buffer();
 139         let mut buf = Rc::make_mut(&mut refbuf);
 140         let res = self.read_buf(buf.as_mut_slice());
 141         if let Err(_) = res { return Err(DemuxerError::IOError); }
 142         Ok(())
 143     }
 144 }
 145
 146 pub struct Demuxer {
 147     streams: Vec<Rc<NAStream>>,
 148 }
 149
 150 impl Demuxer {
 151     pub fn new() -> Self { Demuxer { streams: Vec::new() } }
 152     pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> {
 153         let stream_num = self.streams.len();
 154         let mut str = stream.clone();
 155         str.set_num(stream_num);
 156         self.streams.push(Rc::new(str));
 157         Some(stream_num)
 158     }
 159     pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> {
 160         if idx < self.streams.len() {
 161             Some(self.streams[idx].clone())
 162         } else {
 163             None
 164         }
 165     }
 166     pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> {
 167         for i in 0..self.streams.len() {
 168             if self.streams[i].get_id() == id {
 169                 return Some(self.streams[i].clone());
 170             }
 171         }
 172         None
 173     }
 174     pub fn get_num_streams(&self) -> usize { self.streams.len() }
 175 }
 176
 177 impl From<ByteIOError> for DemuxerError {
 178     fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
 179 }
 180
 181 pub trait FrameFromPacket {
 182     fn new_from_pkt(pkt: &NAPacket, info: Rc<NACodecInfo>) -> NAFrame;
 183     fn fill_timestamps(&mut self, pkt: &NAPacket);
 184 }
 185
 186 impl FrameFromPacket for NAFrame {
 187     fn new_from_pkt(pkt: &NAPacket, info: Rc<NACodecInfo>) -> NAFrame {
 188         NAFrame::new(pkt.pts, pkt.dts, pkt.duration, info, HashMap::new())
 189     }
 190     fn fill_timestamps(&mut self, pkt: &NAPacket) {
 191         self.set_pts(pkt.pts);
 192         self.set_dts(pkt.dts);
 193         self.set_duration(pkt.duration);
 194     }
 195 }
 196
 197 pub trait DemuxerCreator {
 198     fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a>;
 199     fn get_name(&self) -> &'static str;
 200 }
 201
 202 const DEMUXERS: &[&'static DemuxerCreator] = &[
 203 #[cfg(feature="demuxer_avi")]
 204     &avi::AVIDemuxerCreator {},
 205 #[cfg(feature="demuxer_gdv")]
 206     &gdv::GDVDemuxerCreator {},
 207 ];
 208
 209 pub fn find_demuxer(name: &str) -> Option<&DemuxerCreator> {
 210     for i in 0..DEMUXERS.len() {
 211         if DEMUXERS[i].get_name() == name {
 212             return Some(DEMUXERS[i]);
 213         }
 214     }
 215     None
 216 }