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1 | #[cfg(feature="demuxer_gdv")] | |
2 | pub mod gdv; | |
3 | #[cfg(feature="demuxer_avi")] | |
4 | pub mod avi; | |
5 | ||
6 | use std::rc::Rc; | |
7 | use frame::*; | |
8 | use io::byteio::*; | |
9 | ||
10 | #[derive(Debug,Clone,Copy,PartialEq)] | |
11 | #[allow(dead_code)] | |
12 | pub enum DemuxerError { | |
13 | EOF, | |
14 | NoSuchInput, | |
15 | InvalidData, | |
16 | IOError, | |
17 | NotImplemented, | |
18 | MemoryError, | |
19 | } | |
20 | ||
21 | type DemuxerResult<T> = Result<T, DemuxerError>; | |
22 | ||
23 | pub trait Demux<'a> { | |
24 | fn open(&mut self) -> DemuxerResult<()>; | |
25 | fn get_num_streams(&self) -> usize; | |
26 | fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>>; | |
27 | fn get_frame(&mut self) -> DemuxerResult<NAPacket>; | |
28 | fn seek(&mut self, time: u64) -> DemuxerResult<()>; | |
29 | } | |
30 | ||
31 | pub trait NAPacketReader { | |
32 | fn read_packet(&mut self, str: Rc<NAStream>, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>; | |
33 | fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>; | |
34 | } | |
35 | ||
36 | impl<'a> NAPacketReader for ByteReader<'a> { | |
37 | fn read_packet(&mut self, str: Rc<NAStream>, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> { | |
38 | let mut buf: Vec<u8> = Vec::with_capacity(size); | |
39 | if buf.capacity() < size { return Err(DemuxerError::MemoryError); } | |
40 | buf.resize(size, 0); | |
41 | let res = self.read_buf(buf.as_mut_slice()); | |
42 | if let Err(_) = res { return Err(DemuxerError::IOError); } | |
43 | let pkt = NAPacket::new(str, ts, kf, buf); | |
44 | Ok(pkt) | |
45 | } | |
46 | fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> { | |
47 | let mut refbuf = pkt.get_buffer(); | |
48 | let mut buf = Rc::make_mut(&mut refbuf); | |
49 | let res = self.read_buf(buf.as_mut_slice()); | |
50 | if let Err(_) = res { return Err(DemuxerError::IOError); } | |
51 | Ok(()) | |
52 | } | |
53 | } | |
54 | ||
55 | struct Demuxer { | |
56 | streams: Vec<Rc<NAStream>>, | |
57 | } | |
58 | ||
59 | impl Demuxer { | |
60 | pub fn new() -> Self { Demuxer { streams: Vec::new() } } | |
61 | pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> { | |
62 | let stream_num = self.streams.len(); | |
63 | let mut str = stream.clone(); | |
64 | str.set_num(stream_num); | |
65 | self.streams.push(Rc::new(str)); | |
66 | Some(stream_num) | |
67 | } | |
68 | pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> { | |
69 | if idx < self.streams.len() { | |
70 | Some(self.streams[idx].clone()) | |
71 | } else { | |
72 | None | |
73 | } | |
74 | } | |
75 | #[allow(dead_code)] | |
76 | pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> { | |
77 | for i in 0..self.streams.len() { | |
78 | if self.streams[i].get_id() == id { | |
79 | return Some(self.streams[i].clone()); | |
80 | } | |
81 | } | |
82 | None | |
83 | } | |
84 | pub fn get_num_streams(&self) -> usize { self.streams.len() } | |
85 | } | |
86 | ||
87 | impl From<ByteIOError> for DemuxerError { | |
88 | fn from(_: ByteIOError) -> Self { DemuxerError::IOError } | |
89 | } | |
90 | ||
91 | ///The structure used to create demuxers. | |
92 | pub trait DemuxerCreator { | |
93 | /// Create new demuxer instance that will use `ByteReader` source as an input. | |
94 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a>; | |
95 | /// Get the name of current demuxer creator. | |
96 | fn get_name(&self) -> &'static str; | |
97 | } | |
98 | ||
99 | const DEMUXERS: &[&'static DemuxerCreator] = &[ | |
100 | #[cfg(feature="demuxer_avi")] | |
101 | &avi::AVIDemuxerCreator {}, | |
102 | #[cfg(feature="demuxer_gdv")] | |
103 | &gdv::GDVDemuxerCreator {}, | |
104 | ]; | |
105 | ||
106 | pub fn find_demuxer(name: &str) -> Option<&DemuxerCreator> { | |
107 | for &dmx in DEMUXERS { | |
108 | if dmx.get_name() == name { | |
109 | return Some(dmx); | |
110 | } | |
111 | } | |
112 | None | |
113 | } |