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1 | pub use crate::frame::*; | |
2 | pub use crate::io::byteio::*; | |
3 | ||
4 | #[derive(Debug,Clone,Copy,PartialEq)] | |
5 | #[allow(dead_code)] | |
6 | pub enum DemuxerError { | |
7 | EOF, | |
8 | NoSuchInput, | |
9 | InvalidData, | |
10 | IOError, | |
11 | NotImplemented, | |
12 | MemoryError, | |
13 | TryAgain, | |
14 | SeekError, | |
15 | NotPossible, | |
16 | } | |
17 | ||
18 | pub type DemuxerResult<T> = Result<T, DemuxerError>; | |
19 | ||
20 | pub trait DemuxCore<'a> { | |
21 | fn open(&mut self, strmgr: &mut StreamManager, seek_idx: &mut SeekIndex) -> DemuxerResult<()>; | |
22 | fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket>; | |
23 | fn seek(&mut self, time: u64, seek_idx: &SeekIndex) -> DemuxerResult<()>; | |
24 | } | |
25 | ||
26 | pub trait NAPacketReader { | |
27 | fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>; | |
28 | fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>; | |
29 | } | |
30 | ||
31 | impl<'a> NAPacketReader for ByteReader<'a> { | |
32 | fn read_packet(&mut self, str: NAStreamRef, ts: NATimeInfo, kf: bool, size: usize) -> DemuxerResult<NAPacket> { | |
33 | let mut buf: Vec<u8> = Vec::with_capacity(size); | |
34 | if buf.capacity() < size { return Err(DemuxerError::MemoryError); } | |
35 | buf.resize(size, 0); | |
36 | self.read_buf(buf.as_mut_slice())?; | |
37 | let pkt = NAPacket::new(str, ts, kf, buf); | |
38 | Ok(pkt) | |
39 | } | |
40 | fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> { | |
41 | let mut refbuf = pkt.get_buffer(); | |
42 | let buf = refbuf.as_mut().unwrap(); | |
43 | self.read_buf(buf.as_mut_slice())?; | |
44 | Ok(()) | |
45 | } | |
46 | } | |
47 | ||
48 | #[derive(Default)] | |
49 | pub struct StreamManager { | |
50 | streams: Vec<NAStreamRef>, | |
51 | ignored: Vec<bool>, | |
52 | no_ign: bool, | |
53 | } | |
54 | ||
55 | impl StreamManager { | |
56 | pub fn new() -> Self { | |
57 | StreamManager { | |
58 | streams: Vec::new(), | |
59 | ignored: Vec::new(), | |
60 | no_ign: true, | |
61 | } | |
62 | } | |
63 | pub fn iter(&self) -> StreamIter { StreamIter::new(&self.streams) } | |
64 | ||
65 | pub fn add_stream(&mut self, stream: NAStream) -> Option<usize> { | |
66 | let stream_num = self.streams.len(); | |
67 | let mut str = stream.clone(); | |
68 | str.set_num(stream_num); | |
69 | self.streams.push(str.into_ref()); | |
70 | self.ignored.push(false); | |
71 | Some(stream_num) | |
72 | } | |
73 | pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> { | |
74 | if idx < self.streams.len() { | |
75 | Some(self.streams[idx].clone()) | |
76 | } else { | |
77 | None | |
78 | } | |
79 | } | |
80 | pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> { | |
81 | for i in 0..self.streams.len() { | |
82 | if self.streams[i].get_id() == id { | |
83 | return Some(self.streams[i].clone()); | |
84 | } | |
85 | } | |
86 | None | |
87 | } | |
88 | pub fn get_num_streams(&self) -> usize { self.streams.len() } | |
89 | pub fn is_ignored(&self, idx: usize) -> bool { | |
90 | if self.no_ign { | |
91 | true | |
92 | } else if idx < self.ignored.len() { | |
93 | self.ignored[idx] | |
94 | } else { | |
95 | false | |
96 | } | |
97 | } | |
98 | pub fn is_ignored_id(&self, id: u32) -> bool { | |
99 | for i in 0..self.streams.len() { | |
100 | if self.streams[i].get_id() == id { | |
101 | return self.ignored[i]; | |
102 | } | |
103 | } | |
104 | false | |
105 | } | |
106 | pub fn set_ignored(&mut self, idx: usize) { | |
107 | if idx < self.ignored.len() { | |
108 | self.ignored[idx] = true; | |
109 | self.no_ign = false; | |
110 | } | |
111 | } | |
112 | pub fn set_unignored(&mut self, idx: usize) { | |
113 | if idx < self.ignored.len() { | |
114 | self.ignored[idx] = false; | |
115 | } | |
116 | } | |
117 | } | |
118 | ||
119 | pub struct StreamIter<'a> { | |
120 | streams: &'a [NAStreamRef], | |
121 | pos: usize, | |
122 | } | |
123 | ||
124 | impl<'a> StreamIter<'a> { | |
125 | pub fn new(streams: &'a [NAStreamRef]) -> Self { | |
126 | StreamIter { streams, pos: 0 } | |
127 | } | |
128 | } | |
129 | ||
130 | impl<'a> Iterator for StreamIter<'a> { | |
131 | type Item = NAStreamRef; | |
132 | ||
133 | fn next(&mut self) -> Option<Self::Item> { | |
134 | if self.pos >= self.streams.len() { return None; } | |
135 | let ret = self.streams[self.pos].clone(); | |
136 | self.pos += 1; | |
137 | Some(ret) | |
138 | } | |
139 | } | |
140 | ||
141 | #[derive(Clone,Copy,PartialEq)] | |
142 | pub enum SeekIndexMode { | |
143 | None, | |
144 | Present, | |
145 | Automatic, | |
146 | } | |
147 | ||
148 | impl Default for SeekIndexMode { | |
149 | fn default() -> Self { SeekIndexMode::None } | |
150 | } | |
151 | ||
152 | #[derive(Clone,Copy,Default)] | |
153 | pub struct SeekEntry { | |
154 | pub time: u64, // in milliseconds | |
155 | pub pts: u64, | |
156 | pub pos: u64, | |
157 | } | |
158 | ||
159 | #[derive(Clone)] | |
160 | pub struct StreamSeekInfo { | |
161 | pub id: u32, | |
162 | pub filled: bool, | |
163 | pub entries: Vec<SeekEntry>, | |
164 | } | |
165 | ||
166 | impl StreamSeekInfo { | |
167 | pub fn new(id: u32) -> Self { | |
168 | Self { | |
169 | id, | |
170 | filled: false, | |
171 | entries: Vec::new(), | |
172 | } | |
173 | } | |
174 | pub fn add_entry(&mut self, entry: SeekEntry) { | |
175 | self.entries.push(entry); | |
176 | } | |
177 | pub fn find_pos(&self, time: u64) -> Option<SeekEntry> { | |
178 | if !self.entries.is_empty() { | |
179 | // todo something faster like binary search | |
180 | let mut cand = None; | |
181 | for entry in self.entries.iter() { | |
182 | if entry.time <= time { | |
183 | cand = Some(*entry); | |
184 | } else { | |
185 | break; | |
186 | } | |
187 | } | |
188 | cand | |
189 | } else { | |
190 | None | |
191 | } | |
192 | } | |
193 | } | |
194 | ||
195 | #[derive(Clone,Copy,Default)] | |
196 | pub struct SeekIndexResult { | |
197 | pub pts: u64, | |
198 | pub pos: u64, | |
199 | pub str_id: u32, | |
200 | } | |
201 | ||
202 | #[derive(Default)] | |
203 | pub struct SeekIndex { | |
204 | pub seek_info: Vec<StreamSeekInfo>, | |
205 | pub mode: SeekIndexMode, | |
206 | pub skip_index: bool, | |
207 | } | |
208 | ||
209 | impl SeekIndex { | |
210 | pub fn new() -> Self { Self::default() } | |
211 | pub fn add_stream(&mut self, id: u32) -> usize { | |
212 | let ret = self.stream_id_to_index(id); | |
213 | if ret.is_none() { | |
214 | self.seek_info.push(StreamSeekInfo::new(id)); | |
215 | self.seek_info.len() - 1 | |
216 | } else { | |
217 | ret.unwrap() | |
218 | } | |
219 | } | |
220 | pub fn stream_id_to_index(&self, id: u32) -> Option<usize> { | |
221 | for (idx, str) in self.seek_info.iter().enumerate() { | |
222 | if str.id == id { | |
223 | return Some(idx); | |
224 | } | |
225 | } | |
226 | None | |
227 | } | |
228 | pub fn get_stream_index(&mut self, id: u32) -> Option<&mut StreamSeekInfo> { | |
229 | for str in self.seek_info.iter_mut() { | |
230 | if str.id == id { | |
231 | return Some(str); | |
232 | } | |
233 | } | |
234 | None | |
235 | } | |
236 | pub fn add_entry(&mut self, id: u32, entry: SeekEntry) { | |
237 | let mut idx = self.stream_id_to_index(id); | |
238 | if idx.is_none() { | |
239 | idx = Some(self.add_stream(id)); | |
240 | } | |
241 | self.seek_info[idx.unwrap()].add_entry(entry); | |
242 | self.seek_info[idx.unwrap()].filled = true; | |
243 | } | |
244 | pub fn find_pos(&self, time: u64) -> Option<SeekIndexResult> { | |
245 | let mut cand = None; | |
246 | for str in self.seek_info.iter() { | |
247 | if !str.filled { continue; } | |
248 | let res = str.find_pos(time); | |
249 | if res.is_none() { continue; } | |
250 | let res = res.unwrap(); | |
251 | if cand.is_none() { | |
252 | cand = Some(SeekIndexResult { pts: res.pts, pos: res.pos, str_id: str.id }); | |
253 | } else if let Some(entry) = cand { | |
254 | if res.pos < entry.pos { | |
255 | cand = Some(SeekIndexResult { pts: res.pts, pos: res.pos, str_id: str.id }); | |
256 | } | |
257 | } | |
258 | } | |
259 | cand | |
260 | } | |
261 | } | |
262 | ||
263 | pub struct Demuxer<'a> { | |
264 | dmx: Box<dyn DemuxCore<'a> + 'a>, | |
265 | streams: StreamManager, | |
266 | seek_idx: SeekIndex, | |
267 | } | |
268 | ||
269 | impl<'a> Demuxer<'a> { | |
270 | fn new(dmx: Box<dyn DemuxCore<'a> + 'a>, str: StreamManager, seek_idx: SeekIndex) -> Self { | |
271 | Demuxer { | |
272 | dmx, | |
273 | streams: str, | |
274 | seek_idx, | |
275 | } | |
276 | } | |
277 | pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> { | |
278 | self.streams.get_stream(idx) | |
279 | } | |
280 | pub fn get_stream_by_id(&self, id: u32) -> Option<NAStreamRef> { | |
281 | self.streams.get_stream_by_id(id) | |
282 | } | |
283 | pub fn get_num_streams(&self) -> usize { | |
284 | self.streams.get_num_streams() | |
285 | } | |
286 | pub fn get_streams(&self) -> StreamIter { | |
287 | self.streams.iter() | |
288 | } | |
289 | pub fn is_ignored_stream(&self, idx: usize) -> bool { | |
290 | self.streams.is_ignored(idx) | |
291 | } | |
292 | pub fn set_ignored_stream(&mut self, idx: usize) { | |
293 | self.streams.set_ignored(idx) | |
294 | } | |
295 | pub fn set_unignored_stream(&mut self, idx: usize) { | |
296 | self.streams.set_unignored(idx) | |
297 | } | |
298 | ||
299 | pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> { | |
300 | loop { | |
301 | let res = self.dmx.get_frame(&mut self.streams); | |
302 | if self.streams.no_ign || res.is_err() { return res; } | |
303 | let res = res.unwrap(); | |
304 | let idx = res.get_stream().get_num(); | |
305 | if !self.is_ignored_stream(idx) { | |
306 | return Ok(res); | |
307 | } | |
308 | } | |
309 | } | |
310 | pub fn seek(&mut self, time: u64) -> DemuxerResult<()> { | |
311 | if self.seek_idx.skip_index { | |
312 | return Err(DemuxerError::NotPossible); | |
313 | } | |
314 | self.dmx.seek(time, &self.seek_idx) | |
315 | } | |
316 | pub fn get_seek_index(&self) -> &SeekIndex { | |
317 | &self.seek_idx | |
318 | } | |
319 | } | |
320 | ||
321 | impl From<ByteIOError> for DemuxerError { | |
322 | fn from(_: ByteIOError) -> Self { DemuxerError::IOError } | |
323 | } | |
324 | ||
325 | ///The structure used to create demuxers. | |
326 | pub trait DemuxerCreator { | |
327 | /// Create new demuxer instance that will use `ByteReader` source as an input. | |
328 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a>; | |
329 | /// Get the name of current demuxer creator. | |
330 | fn get_name(&self) -> &'static str; | |
331 | } | |
332 | ||
333 | pub fn create_demuxer<'a>(dmxcr: &DemuxerCreator, br: &'a mut ByteReader<'a>) -> DemuxerResult<Demuxer<'a>> { | |
334 | let mut dmx = dmxcr.new_demuxer(br); | |
335 | let mut str = StreamManager::new(); | |
336 | let mut seek_idx = SeekIndex::new(); | |
337 | dmx.open(&mut str, &mut seek_idx)?; | |
338 | Ok(Demuxer::new(dmx, str, seek_idx)) | |
339 | } | |
340 | ||
341 | #[derive(Default)] | |
342 | pub struct RegisteredDemuxers { | |
343 | dmxs: Vec<&'static DemuxerCreator>, | |
344 | } | |
345 | ||
346 | impl RegisteredDemuxers { | |
347 | pub fn new() -> Self { | |
348 | Self { dmxs: Vec::new() } | |
349 | } | |
350 | pub fn add_demuxer(&mut self, dmx: &'static DemuxerCreator) { | |
351 | self.dmxs.push(dmx); | |
352 | } | |
353 | pub fn find_demuxer(&self, name: &str) -> Option<&DemuxerCreator> { | |
354 | for &dmx in self.dmxs.iter() { | |
355 | if dmx.get_name() == name { | |
356 | return Some(dmx); | |
357 | } | |
358 | } | |
359 | None | |
360 | } | |
361 | } |