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1 | use std::io::SeekFrom; | |
2 | use nihav_core::codecs::*; | |
3 | use nihav_core::demuxers::*; | |
4 | use nihav_registry::detect; | |
5 | use nihav_core::io::byteio::ByteReader; | |
6 | use super::allreg::FullRegister; | |
7 | ||
8 | pub struct RawStreamCtx<'a> { | |
9 | stream: NAStreamRef, | |
10 | pkt: Box<dyn NAPacketiser + Send>, | |
11 | br: &'a mut ByteReader<'a>, | |
12 | pts: u64, | |
13 | seek: SeekIndex, | |
14 | } | |
15 | ||
16 | impl<'a> RawStreamCtx<'a> { | |
17 | fn new(stream: NAStreamRef, packetiser: Box<dyn NAPacketiser + Send>, br: &'a mut ByteReader<'a>) -> Self { | |
18 | let mut seek = SeekIndex::new(); | |
19 | seek.add_stream(0); | |
20 | Self { stream, pkt: packetiser, br, pts: 0, seek } | |
21 | } | |
22 | fn account_for_packet(&mut self, packet: &mut NAPacket) { | |
23 | let pos = self.br.tell() - (self.pkt.bytes_left() as u64); | |
24 | if packet.get_pts().is_none() && packet.get_duration().is_some() { | |
25 | packet.ts.pts = Some(self.pts); | |
26 | } | |
27 | if packet.is_keyframe() { | |
28 | let pts = packet.get_pts().unwrap_or(self.pts); | |
29 | let time = NATimeInfo::ts_to_time(pts, 1000, self.stream.tb_num, self.stream.tb_den); | |
30 | let in_range = if let Some(last) = self.seek.seek_info[0].entries.last() { | |
31 | last.pts >= pts | |
32 | } else { | |
33 | false | |
34 | }; | |
35 | if !in_range { | |
36 | self.seek.add_entry(0, SeekEntry { time, pts, pos }); | |
37 | } | |
38 | } | |
39 | self.pts += packet.get_duration().unwrap_or(0); | |
40 | } | |
41 | fn get_frame(&mut self) -> DemuxerResult<NAPacket> { | |
42 | let mut buf = [0; 1048576]; | |
43 | loop { | |
44 | match self.pkt.get_packet(self.stream.clone()) { | |
45 | Ok(Some(mut packet)) => { | |
46 | self.account_for_packet(&mut packet); | |
47 | return Ok(packet); | |
48 | }, | |
49 | Ok(None) => {}, | |
50 | Err(DecoderError::ShortData) => {}, | |
51 | _ => return Err(DemuxerError::InvalidData), | |
52 | }; | |
53 | match self.br.read_buf_some(&mut buf) { | |
54 | Ok(size) => { | |
55 | self.pkt.add_data(&buf[..size]); | |
56 | }, | |
57 | Err(_) => { | |
58 | match self.pkt.get_packet(self.stream.clone()) { | |
59 | Ok(Some(mut packet)) => { | |
60 | self.account_for_packet(&mut packet); | |
61 | return Ok(packet); | |
62 | }, | |
63 | Ok(None) | Err(DecoderError::ShortData) => return Err(DemuxerError::EOF), | |
64 | _ => return Err(DemuxerError::InvalidData), | |
65 | }; | |
66 | }, | |
67 | }; | |
68 | } | |
69 | } | |
70 | } | |
71 | ||
72 | pub enum DemuxerObject<'a> { | |
73 | None, | |
74 | Normal(Demuxer<'a>), | |
75 | Raw(RawDemuxer<'a>, Vec<Option<Box<dyn NAPacketiser + Send>>>, bool), | |
76 | RawStream(RawStreamCtx<'a>), | |
77 | } | |
78 | ||
79 | impl<'a> DemuxerObject<'a> { | |
80 | pub fn create(br: &'a mut ByteReader<'a>, reg: &FullRegister, name: &str, is_raw: bool) -> DemuxerObject<'a> { | |
81 | if !is_raw { | |
82 | let res = detect::detect_format(name, br); | |
83 | let (dmx_name, _) = res.unwrap_or(("", detect::DetectionScore::No)); | |
84 | if !dmx_name.is_empty() { | |
85 | println!("trying demuxer {} on {}", dmx_name, name); | |
86 | if let Some(dmx_fact) = reg.dmx_reg.find_demuxer(dmx_name) { | |
87 | br.seek(SeekFrom::Start(0)).unwrap(); | |
88 | let dmx = create_demuxer(dmx_fact, br).unwrap(); | |
89 | return DemuxerObject::Normal(dmx); | |
90 | } | |
91 | } | |
92 | if !dmx_name.is_empty() { | |
93 | println!("trying raw demuxer {} on {}", dmx_name, name); | |
94 | if let Some(rdmx_fact) = reg.rdmx_reg.find_demuxer(dmx_name) { | |
95 | br.seek(SeekFrom::Start(0)).unwrap(); | |
96 | let dmx = create_raw_demuxer(rdmx_fact, br).unwrap(); | |
97 | let mut pkts = Vec::new(); | |
98 | for stream in dmx.get_streams() { | |
99 | if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) { | |
100 | let packetiser = (pcreate)(); | |
101 | pkts.push(Some(packetiser)); | |
102 | } else { | |
103 | pkts.push(None); | |
104 | } | |
105 | } | |
106 | return DemuxerObject::Raw(dmx, pkts, false); | |
107 | } | |
108 | } | |
109 | for rdmx in reg.rdmx_reg.iter() { | |
110 | if rdmx.check_format(br) { | |
111 | println!("detected {} as {}", name, rdmx.get_name()); | |
112 | br.seek(SeekFrom::Start(0)).unwrap(); | |
113 | let dmx = create_raw_demuxer(*rdmx, br).unwrap(); | |
114 | let mut pkts = Vec::new(); | |
115 | for stream in dmx.get_streams() { | |
116 | if let Some(pcreate) = reg.pkt_reg.find_packetiser(stream.get_info().get_name()) { | |
117 | let packetiser = (pcreate)(); | |
118 | pkts.push(Some(packetiser)); | |
119 | } else { | |
120 | pkts.push(None); | |
121 | } | |
122 | } | |
123 | return DemuxerObject::Raw(dmx, pkts, false); | |
124 | } | |
125 | } | |
126 | } | |
127 | br.seek(SeekFrom::Start(0)).unwrap(); | |
128 | let mut buf = vec![0; 1048576]; | |
129 | let size = br.read_buf_some(&mut buf).unwrap(); | |
130 | br.seek(SeekFrom::Start(0)).unwrap(); | |
131 | let mut pname = ""; | |
132 | ||
133 | for pinfo in reg.pkt_reg.iter() { | |
134 | let mut packetiser = (pinfo.get_packetiser)(); | |
135 | packetiser.add_data(&buf[..size]); | |
136 | if packetiser.parse_stream(0).is_ok() { | |
137 | pname = pinfo.name; | |
138 | break; | |
139 | } | |
140 | } | |
141 | if !pname.is_empty() { | |
142 | println!("found raw stream of type {} for {}", pname, name); | |
143 | let pcreate = reg.pkt_reg.find_packetiser(pname).unwrap(); | |
144 | let mut packetiser = (pcreate)(); | |
145 | packetiser.add_data(&buf[..size]); | |
146 | let stream = packetiser.parse_stream(0).unwrap(); | |
147 | packetiser.reset(); | |
148 | DemuxerObject::RawStream(RawStreamCtx::new(stream, packetiser, br)) | |
149 | } else { | |
150 | DemuxerObject::None | |
151 | } | |
152 | } | |
153 | pub fn is_none(&self) -> bool { | |
154 | matches!(*self, DemuxerObject::None) | |
155 | } | |
156 | pub fn get_duration(&self) -> u64 { | |
157 | match *self { | |
158 | DemuxerObject::Normal(ref dmx) => dmx.get_duration(), | |
159 | DemuxerObject::Raw(ref dmx, _, _) => dmx.get_duration(), | |
160 | DemuxerObject::RawStream(ref ctx) => { | |
161 | NATimeInfo::ts_to_time(ctx.stream.duration, 1000, ctx.stream.tb_num, ctx.stream.tb_den) | |
162 | }, | |
163 | _ => 0, | |
164 | } | |
165 | } | |
166 | pub fn get_num_streams(&self) -> usize { | |
167 | match *self { | |
168 | DemuxerObject::None => 0, | |
169 | DemuxerObject::Normal(ref dmx) => dmx.get_num_streams(), | |
170 | DemuxerObject::Raw(ref dmx, _, _) => dmx.get_num_streams(), | |
171 | DemuxerObject::RawStream(_) => 1, | |
172 | } | |
173 | } | |
174 | pub fn get_stream(&self, idx: usize) -> Option<NAStreamRef> { | |
175 | match *self { | |
176 | DemuxerObject::Normal(ref dmx) => dmx.get_stream(idx), | |
177 | DemuxerObject::Raw(ref dmx, _, _) => dmx.get_stream(idx), | |
178 | DemuxerObject::RawStream(ref ctx) if idx == 0 => Some(ctx.stream.clone()), | |
179 | _ => None, | |
180 | } | |
181 | } | |
182 | pub fn get_frame(&mut self) -> DemuxerResult<NAPacket> { | |
183 | match *self { | |
184 | DemuxerObject::Normal(ref mut dmx) => dmx.get_frame(), | |
185 | DemuxerObject::Raw(ref mut dmx, ref mut packetisers, ref mut eof) => { | |
186 | loop { | |
187 | let mut has_some = false; | |
188 | for (stream, p) in dmx.get_streams().zip(packetisers.iter_mut()) { | |
189 | if let Some(ref mut pkts) = p { | |
190 | match pkts.get_packet(stream.clone()) { | |
191 | Ok(Some(pkt)) => return Ok(pkt), | |
192 | Ok(None) | Err(DecoderError::ShortData) => { | |
193 | if *eof { | |
194 | *p = None; | |
195 | } | |
196 | }, | |
197 | Err(err) => { | |
198 | println!("packetisation error {:?}", err); | |
199 | return Err(DemuxerError::InvalidData); | |
200 | } | |
201 | }; | |
202 | has_some |= p.is_some(); | |
203 | } | |
204 | } | |
205 | if !has_some { | |
206 | return Err(DemuxerError::EOF); | |
207 | } | |
208 | if let Ok(data) = dmx.get_data() { | |
209 | let id = data.get_stream().get_id(); | |
210 | for (i, stream) in dmx.get_streams().enumerate() { | |
211 | if stream.get_id() == id { | |
212 | if let Some(ref mut pkts) = packetisers[i] { | |
213 | pkts.add_data(&data.get_buffer()); | |
214 | } | |
215 | break; | |
216 | } | |
217 | } | |
218 | } else { | |
219 | *eof = true; | |
220 | } | |
221 | } | |
222 | }, | |
223 | DemuxerObject::RawStream(ref mut ctx) => ctx.get_frame(), | |
224 | _ => unreachable!(), | |
225 | } | |
226 | } | |
227 | pub fn seek(&mut self, seek_time: NATimePoint) -> DemuxerResult<()> { | |
228 | match *self { | |
229 | DemuxerObject::Normal(ref mut dmx) => dmx.seek(seek_time), | |
230 | DemuxerObject::Raw(ref mut dmx, _, _) => dmx.seek(seek_time), | |
231 | DemuxerObject::RawStream(ref mut ctx) => { | |
232 | if seek_time == NATimePoint::None { | |
233 | return Err(DemuxerError::SeekError); | |
234 | } | |
235 | if let Some(last) = ctx.seek.seek_info[0].entries.last() { | |
236 | let in_index = match seek_time { | |
237 | NATimePoint::None => unreachable!(), | |
238 | NATimePoint::PTS(pts) => last.pts >= pts, | |
239 | NATimePoint::Milliseconds(ms) => last.time >= ms, | |
240 | }; | |
241 | if in_index { | |
242 | if let Some(result) = ctx.seek.find_pos(seek_time) { | |
243 | ctx.br.seek(SeekFrom::Start(result.pos))?; | |
244 | ctx.pts = result.pts; | |
245 | ctx.pkt.reset(); | |
246 | return Ok(()); | |
247 | } | |
248 | } | |
249 | } | |
250 | if let Some(last) = ctx.seek.seek_info[0].entries.last() { | |
251 | ctx.br.seek(SeekFrom::Start(last.pos))?; | |
252 | ctx.pts = last.pts; | |
253 | ctx.pkt.reset(); | |
254 | } | |
255 | let mut key_pts = 0; | |
256 | while let Ok(pkt) = ctx.get_frame() { | |
257 | if !pkt.ts.less_than(seek_time) && !pkt.ts.equal(seek_time) { | |
258 | break; | |
259 | } | |
260 | if pkt.is_keyframe() { | |
261 | key_pts = pkt.get_pts().unwrap_or(0); | |
262 | } | |
263 | } | |
264 | let result = ctx.seek.find_pos(NATimePoint::PTS(key_pts)).unwrap(); | |
265 | ctx.br.seek(SeekFrom::Start(result.pos))?; | |
266 | ctx.pts = result.pts; | |
267 | ctx.pkt.reset(); | |
268 | Ok(()) | |
269 | }, | |
270 | _ => Err(DemuxerError::NotImplemented), | |
271 | } | |
272 | } | |
273 | } | |
274 | ||
275 | pub fn detect_tags(br: &mut ByteReader) -> (bool, u64, Option<u64>) { | |
276 | let mut is_raw = false; | |
277 | let mut start = 0; | |
278 | let mut end = None; | |
279 | ||
280 | // check for ID3v{2-4} | |
281 | let mut buf = [0; 5]; | |
282 | loop { | |
283 | if br.peek_buf(&mut buf).is_err() { | |
284 | break; | |
285 | } | |
286 | if &buf[0..3] == b"ID3" && buf[3] > 0 && buf[3] < 5 && buf[4] == 0 { //ID3 tag found, must be a raw stream | |
287 | br.read_skip(6).unwrap(); | |
288 | let mut size = 0; | |
289 | for _ in 0..4 { | |
290 | let b = br.read_byte().unwrap(); | |
291 | if (b & 0x80) != 0 { | |
292 | println!("Invalid ID3 size"); | |
293 | break; | |
294 | } | |
295 | size = (size << 7) | u64::from(b); | |
296 | } | |
297 | start += size + 10; | |
298 | br.read_skip(size as usize).unwrap(); | |
299 | while let Ok(0) = br.read_byte() { | |
300 | start += 1; | |
301 | } | |
302 | br.seek(SeekFrom::Start(start)).unwrap(); | |
303 | is_raw = true; | |
304 | } else { | |
305 | break; | |
306 | } | |
307 | } | |
308 | // check for ID3v1 | |
309 | br.seek(SeekFrom::End(-128)).unwrap(); | |
310 | let off = br.tell(); | |
311 | br.peek_buf(&mut buf[..3]).unwrap(); | |
312 | if &buf[0..3] == b"TAG" { | |
313 | end = Some(off); | |
314 | // check for Lyrics v2 | |
315 | let mut sig = [0; 9]; | |
316 | br.seek(SeekFrom::End(-128 - 9)).unwrap(); | |
317 | br.peek_buf(&mut sig).unwrap(); | |
318 | if &sig == b"LYRICS200" { | |
319 | br.seek(SeekFrom::Current(-6)).unwrap(); | |
320 | let mut sizestr = [0; 6]; | |
321 | br.peek_buf(&mut sizestr).unwrap(); | |
322 | if let Ok(sstr) = std::str::from_utf8(&sizestr) { | |
323 | if let Ok(size) = sstr.parse::<u64>() { | |
324 | end = Some(br.tell() - size); | |
325 | } | |
326 | } | |
327 | } | |
328 | } | |
329 | // check for APETAG | |
330 | let mut buf = [0; 8]; | |
331 | if let Some(off) = end { | |
332 | br.seek(SeekFrom::Start(off - 32)).unwrap(); | |
333 | } else { | |
334 | br.seek(SeekFrom::End(-32)).unwrap(); | |
335 | } | |
336 | let off = br.tell(); | |
337 | br.read_buf(&mut buf).unwrap(); | |
338 | if &buf == b"APETAGEX" { | |
339 | let ver = br.read_u32le().unwrap(); | |
340 | let size = u64::from(br.read_u32le().unwrap()); | |
341 | let _items = br.read_u32le().unwrap(); | |
342 | let flags = br.read_u32le().unwrap(); | |
343 | if ver == 1000 || (flags & 0x80000000) == 0 { | |
344 | end = Some(off - size + 32); | |
345 | } else { | |
346 | end = Some(off - size); | |
347 | } | |
348 | } | |
349 | ||
350 | (is_raw, start, end) | |
351 | } |