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1 | use std::rc::Rc; | |
2 | use frame::*; | |
3 | use io::byteio::*; | |
4 | ||
5 | #[derive(Debug,Clone,Copy,PartialEq)] | |
6 | #[allow(dead_code)] | |
7 | pub enum DemuxerError { | |
8 | EOF, | |
9 | NoSuchInput, | |
10 | InvalidData, | |
11 | IOError, | |
12 | NotImplemented, | |
13 | MemoryError, | |
14 | } | |
15 | ||
16 | type DemuxerResult<T> = Result<T, DemuxerError>; | |
17 | ||
18 | pub trait DemuxCore<'a> { | |
19 | fn open(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<()>; | |
20 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket>; | |
21 | fn seek(&mut self, time: u64) -> DemuxerResult<()>; | |
22 | } | |
23 | ||
24 | pub trait NAPacketReader { | |
25 | fn read_packet(&mut self, str: Rc<NAStream>, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>; | |
26 | fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>; | |
27 | } | |
28 | ||
29 | impl<'a> NAPacketReader for ByteReader<'a> { | |
30 | fn read_packet(&mut self, str: Rc<NAStream>, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> { | |
31 | let mut buf: Vec<u8> = Vec::with_capacity(size); | |
32 | if buf.capacity() < size { return Err(DemuxerError::MemoryError); } | |
33 | buf.resize(size, 0); | |
34 | let res = self.read_buf(buf.as_mut_slice()); | |
35 | if let Err(_) = res { return Err(DemuxerError::IOError); } | |
36 | let pkt = NAPacket::new(str, ts, kf, buf); | |
37 | Ok(pkt) | |
38 | } | |
39 | fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> { | |
40 | let mut refbuf = pkt.get_buffer(); | |
41 | let mut buf = Rc::make_mut(&mut refbuf); | |
42 | let res = self.read_buf(buf.as_mut_slice()); | |
43 | if let Err(_) = res { return Err(DemuxerError::IOError); } | |
44 | Ok(()) | |
45 | } | |
46 | } | |
47 | ||
48 | pub struct StreamManager { | |
49 | streams: Vec<Rc<NAStream>>, | |
50 | ignored: Vec<bool>, | |
51 | no_ign: bool, | |
52 | } | |
53 | ||
54 | impl StreamManager { | |
55 | pub fn new() -> Self { | |
56 | StreamManager { | |
57 | streams: Vec::new(), | |
58 | ignored: Vec::new(), | |
59 | no_ign: true, | |
60 | } | |
61 | } | |
62 | pub fn iter(&self) -> StreamIter { StreamIter::new(&self.streams) } | |
63 | ||
64 | pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> { | |
65 | let stream_num = self.streams.len(); | |
66 | let mut str = stream.clone(); | |
67 | str.set_num(stream_num); | |
68 | self.streams.push(Rc::new(str)); | |
69 | self.ignored.push(false); | |
70 | Some(stream_num) | |
71 | } | |
72 | pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> { | |
73 | if idx < self.streams.len() { | |
74 | Some(self.streams[idx].clone()) | |
75 | } else { | |
76 | None | |
77 | } | |
78 | } | |
79 | pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> { | |
80 | for i in 0..self.streams.len() { | |
81 | if self.streams[i].get_id() == id { | |
82 | return Some(self.streams[i].clone()); | |
83 | } | |
84 | } | |
85 | None | |
86 | } | |
87 | pub fn get_num_streams(&self) -> usize { self.streams.len() } | |
88 | pub fn is_ignored(&self, idx: usize) -> bool { | |
89 | if self.no_ign { | |
90 | true | |
91 | } else if idx < self.ignored.len() { | |
92 | self.ignored[idx] | |
93 | } else { | |
94 | false | |
95 | } | |
96 | } | |
97 | pub fn is_ignored_id(&self, id: u32) -> bool { | |
98 | for i in 0..self.streams.len() { | |
99 | if self.streams[i].get_id() == id { | |
100 | return self.ignored[i]; | |
101 | } | |
102 | } | |
103 | false | |
104 | } | |
105 | pub fn set_ignored(&mut self, idx: usize) { | |
106 | if idx < self.ignored.len() { | |
107 | self.ignored[idx] = true; | |
108 | self.no_ign = false; | |
109 | } | |
110 | } | |
111 | pub fn set_unignored(&mut self, idx: usize) { | |
112 | if idx < self.ignored.len() { | |
113 | self.ignored[idx] = false; | |
114 | } | |
115 | } | |
116 | } | |
117 | ||
118 | pub struct StreamIter<'a> { | |
119 | streams: &'a Vec<Rc<NAStream>>, | |
120 | pos: usize, | |
121 | } | |
122 | ||
123 | impl<'a> StreamIter<'a> { | |
124 | pub fn new(streams: &'a Vec<Rc<NAStream>>) -> Self { | |
125 | StreamIter { streams: streams, pos: 0 } | |
126 | } | |
127 | } | |
128 | ||
129 | impl<'a> Iterator for StreamIter<'a> { | |
130 | type Item = Rc<NAStream>; | |
131 | ||
132 | fn next(&mut self) -> Option<Self::Item> { | |
133 | if self.pos >= self.streams.len() { return None; } | |
134 | let ret = self.streams[self.pos].clone(); | |
135 | self.pos += 1; | |
136 | Some(ret) | |
137 | } | |
138 | } | |
139 | ||
140 | pub struct Demuxer<'a> { | |
141 | dmx: Box<DemuxCore<'a> + 'a>, | |
142 | streams: StreamManager, | |
143 | } | |
144 | ||
145 | impl<'a> Demuxer<'a> { | |
146 | fn new(dmx: Box<DemuxCore<'a> + 'a>, str: StreamManager) -> Self { | |
147 | Demuxer { | |
148 | dmx: dmx, | |
149 | streams: str, | |
150 | } | |
151 | } | |
152 | pub fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> { | |
153 | self.streams.get_stream(idx) | |
154 | } | |
155 | pub fn get_stream_by_id(&self, id: u32) -> Option<Rc<NAStream>> { | |
156 | self.streams.get_stream_by_id(id) | |
157 | } | |
158 | pub fn get_num_streams(&self) -> usize { | |
159 | self.streams.get_num_streams() | |
160 | } | |
161 | pub fn get_streams(&self) -> StreamIter { | |
162 | self.streams.iter() | |
163 | } | |
164 | pub fn is_ignored_stream(&self, idx: usize) -> bool { | |
165 | self.streams.is_ignored(idx) | |
166 | } | |
167 | pub fn set_ignored_stream(&mut self, idx: usize) { | |
168 | self.streams.set_ignored(idx) | |
169 | } | |
170 | pub fn set_unignored_stream(&mut self, idx: usize) { | |
171 | self.streams.set_unignored(idx) | |
172 | } | |
173 | ||
174 | pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> { | |
175 | loop { | |
176 | let res = self.dmx.get_frame(&mut self.streams); | |
177 | if self.streams.no_ign || res.is_err() { return res; } | |
178 | let res = res.unwrap(); | |
179 | let idx = res.get_stream().get_num(); | |
180 | if !self.is_ignored_stream(idx) { | |
181 | return Ok(res); | |
182 | } | |
183 | } | |
184 | } | |
185 | pub fn seek(&mut self, time: u64) -> DemuxerResult<()> { | |
186 | self.dmx.seek(time) | |
187 | } | |
188 | } | |
189 | ||
190 | impl From<ByteIOError> for DemuxerError { | |
191 | fn from(_: ByteIOError) -> Self { DemuxerError::IOError } | |
192 | } | |
193 | ||
194 | ///The structure used to create demuxers. | |
195 | pub trait DemuxerCreator { | |
196 | /// Create new demuxer instance that will use `ByteReader` source as an input. | |
197 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<DemuxCore<'a> + 'a>; | |
198 | /// Get the name of current demuxer creator. | |
199 | fn get_name(&self) -> &'static str; | |
200 | } | |
201 | ||
202 | macro_rules! validate { | |
203 | ($a:expr) => { if !$a { return Err(DemuxerError::InvalidData); } }; | |
204 | } | |
205 | ||
206 | #[cfg(feature="demuxer_gdv")] | |
207 | mod gdv; | |
208 | #[cfg(feature="demuxer_avi")] | |
209 | mod avi; | |
210 | #[cfg(feature="demuxer_real")] | |
211 | mod realmedia; | |
212 | ||
213 | ||
214 | const DEMUXERS: &[&'static DemuxerCreator] = &[ | |
215 | #[cfg(feature="demuxer_avi")] | |
216 | &avi::AVIDemuxerCreator {}, | |
217 | #[cfg(feature="demuxer_gdv")] | |
218 | &gdv::GDVDemuxerCreator {}, | |
219 | #[cfg(feature="demuxer_real")] | |
220 | &realmedia::RealMediaDemuxerCreator {}, | |
221 | //#[cfg(feature="demuxer_real")] | |
222 | // &realmedia::RealAudioDemuxerCreator {}, | |
223 | //#[cfg(feature="demuxer_real")] | |
224 | // &realmedia::RealIVRDemuxerCreator {}, | |
225 | ]; | |
226 | ||
227 | pub fn find_demuxer(name: &str) -> Option<&DemuxerCreator> { | |
228 | for &dmx in DEMUXERS { | |
229 | if dmx.get_name() == name { | |
230 | return Some(dmx); | |
231 | } | |
232 | } | |
233 | None | |
234 | } | |
235 | ||
236 | pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> { | |
237 | let mut dmx = dmxcr.new_demuxer(br); | |
238 | let mut str = StreamManager::new(); | |
239 | dmx.open(&mut str)?; | |
240 | Ok(Demuxer::new(dmx, str)) | |
241 | } |