]>
Commit | Line | Data |
---|---|---|
1b5ebe1d KS |
1 | //! Container format detection. |
2 | //! | |
3 | //! Usually user does not know the container format of the opened file. | |
4 | //! That is why format detection functionality is needed. | |
5 | //! This module contains the set of rules to detect container not merely by file extension but also by its content if possible. | |
6 | //! | |
7 | //! # Examples | |
8 | //! | |
9 | //! ```no_run | |
01f55c6a | 10 | //! use nihav_registry::detect::detect_format; |
1b5ebe1d KS |
11 | //! use std::fs::File; |
12 | //! use nihav_core::io::byteio::*; | |
13 | //! | |
14 | //! let name = "mediafile.ogv"; | |
15 | //! let mut file = File::open(name).unwrap(); | |
16 | //! let mut filereader = FileReader::new_read(&mut file); | |
17 | //! let mut br = ByteReader::new(&mut filereader); | |
18 | //! let result = detect_format(name, &mut br); | |
19 | //! if let Some((name, score)) = result { | |
20 | //! println!("detected format {} with score {:?}", name, score); | |
21 | //! } | |
22 | //! ``` | |
d8ce0de0 | 23 | use std::io::SeekFrom; |
32f7cbe5 | 24 | use nihav_core::io::byteio::ByteReader; |
d8ce0de0 | 25 | |
1b5ebe1d | 26 | /// Format detection score. |
d8ce0de0 KS |
27 | #[derive(Debug,Clone,Copy,PartialEq)] |
28 | pub enum DetectionScore { | |
1b5ebe1d | 29 | /// Format is not detected. |
d8ce0de0 | 30 | No, |
1b5ebe1d | 31 | /// Format matched by file extension. |
d8ce0de0 | 32 | ExtensionMatches, |
1b5ebe1d | 33 | /// Format matches by markers inside the file. |
d8ce0de0 KS |
34 | MagicMatches, |
35 | } | |
36 | ||
37 | impl DetectionScore { | |
1b5ebe1d | 38 | /// Checks whether current detection score is less than a value it is compared against. |
e243ceb4 KS |
39 | pub fn less(self, other: DetectionScore) -> bool { |
40 | (self as i32) < (other as i32) | |
d8ce0de0 KS |
41 | } |
42 | } | |
43 | ||
44 | #[allow(dead_code)] | |
b5bd2ae4 | 45 | enum Arg { |
d8ce0de0 KS |
46 | Byte(u8), |
47 | U16BE(u16), | |
48 | U16LE(u16), | |
49 | U24BE(u32), | |
50 | U24LE(u32), | |
51 | U32BE(u32), | |
52 | U32LE(u32), | |
53 | U64BE(u64), | |
54 | U64LE(u64), | |
55 | } | |
56 | ||
b5bd2ae4 | 57 | impl Arg { |
d8ce0de0 KS |
58 | fn val(&self) -> u64 { |
59 | match *self { | |
e243ceb4 KS |
60 | Arg::Byte(b) => { u64::from(b) } |
61 | Arg::U16BE(v) => { u64::from(v) } | |
62 | Arg::U16LE(v) => { u64::from(v) } | |
63 | Arg::U24BE(v) => { u64::from(v) } | |
64 | Arg::U24LE(v) => { u64::from(v) } | |
65 | Arg::U32BE(v) => { u64::from(v) } | |
66 | Arg::U32LE(v) => { u64::from(v) } | |
b5bd2ae4 KS |
67 | Arg::U64BE(v) => { v } |
68 | Arg::U64LE(v) => { v } | |
d8ce0de0 KS |
69 | } |
70 | } | |
71 | fn read_val(&self, src: &mut ByteReader) -> Option<u64> { | |
72 | match *self { | |
b5bd2ae4 | 73 | Arg::Byte(_) => { |
d8ce0de0 | 74 | let res = src.peek_byte(); |
e243ceb4 KS |
75 | if res.is_err() { return None; } |
76 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 77 | } |
b5bd2ae4 | 78 | Arg::U16BE(_) => { |
d8ce0de0 | 79 | let res = src.peek_u16be(); |
e243ceb4 KS |
80 | if res.is_err() { return None; } |
81 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 82 | } |
b5bd2ae4 | 83 | Arg::U16LE(_) => { |
d8ce0de0 | 84 | let res = src.peek_u16le(); |
e243ceb4 KS |
85 | if res.is_err() { return None; } |
86 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 87 | } |
b5bd2ae4 | 88 | Arg::U24BE(_) => { |
d8ce0de0 | 89 | let res = src.peek_u24be(); |
e243ceb4 KS |
90 | if res.is_err() { return None; } |
91 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 92 | } |
b5bd2ae4 | 93 | Arg::U24LE(_) => { |
d8ce0de0 | 94 | let res = src.peek_u24le(); |
e243ceb4 KS |
95 | if res.is_err() { return None; } |
96 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 97 | } |
b5bd2ae4 | 98 | Arg::U32BE(_) => { |
d8ce0de0 | 99 | let res = src.peek_u32be(); |
e243ceb4 KS |
100 | if res.is_err() { return None; } |
101 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 102 | } |
b5bd2ae4 | 103 | Arg::U32LE(_) => { |
d8ce0de0 | 104 | let res = src.peek_u32le(); |
e243ceb4 KS |
105 | if res.is_err() { return None; } |
106 | Some(u64::from(res.unwrap())) | |
d8ce0de0 | 107 | } |
b5bd2ae4 | 108 | Arg::U64BE(_) => { |
d8ce0de0 | 109 | let res = src.peek_u64be(); |
e243ceb4 | 110 | if res.is_err() { return None; } |
d8ce0de0 KS |
111 | Some(res.unwrap()) |
112 | } | |
b5bd2ae4 | 113 | Arg::U64LE(_) => { |
d8ce0de0 | 114 | let res = src.peek_u64le(); |
e243ceb4 | 115 | if res.is_err() { return None; } |
d8ce0de0 KS |
116 | Some(res.unwrap()) |
117 | } | |
118 | } | |
119 | } | |
120 | fn eq(&self, src: &mut ByteReader) -> bool { | |
01f55c6a KS |
121 | if let Some(rval) = self.read_val(src) { |
122 | rval == self.val() | |
123 | } else { | |
124 | false | |
125 | } | |
d8ce0de0 KS |
126 | } |
127 | fn ge(&self, src: &mut ByteReader) -> bool { | |
01f55c6a KS |
128 | if let Some(rval) = self.read_val(src) { |
129 | rval >= self.val() | |
130 | } else { | |
131 | false | |
132 | } | |
d8ce0de0 KS |
133 | } |
134 | fn gt(&self, src: &mut ByteReader) -> bool { | |
01f55c6a KS |
135 | if let Some(rval) = self.read_val(src) { |
136 | rval > self.val() | |
137 | } else { | |
138 | false | |
139 | } | |
d8ce0de0 KS |
140 | } |
141 | fn le(&self, src: &mut ByteReader) -> bool { | |
01f55c6a KS |
142 | if let Some(rval) = self.read_val(src) { |
143 | rval <= self.val() | |
144 | } else { | |
145 | false | |
146 | } | |
d8ce0de0 KS |
147 | } |
148 | fn lt(&self, src: &mut ByteReader) -> bool { | |
01f55c6a KS |
149 | if let Some(rval) = self.read_val(src) { |
150 | rval < self.val() | |
151 | } else { | |
152 | false | |
153 | } | |
d8ce0de0 KS |
154 | } |
155 | } | |
156 | ||
157 | #[allow(dead_code)] | |
b5bd2ae4 KS |
158 | enum CC<'a> { |
159 | Or(&'a CC<'a>, &'a CC<'a>), | |
160 | Eq(Arg), | |
161 | Str(&'static [u8]), | |
162 | In(Arg, Arg), | |
163 | Lt(Arg), | |
164 | Le(Arg), | |
165 | Gt(Arg), | |
166 | Ge(Arg), | |
d8ce0de0 KS |
167 | } |
168 | ||
b5bd2ae4 | 169 | impl<'a> CC<'a> { |
d8ce0de0 KS |
170 | fn eval(&self, src: &mut ByteReader) -> bool { |
171 | match *self { | |
6f263099 | 172 | CC::Or(a, b) => { a.eval(src) || b.eval(src) }, |
b5bd2ae4 | 173 | CC::Eq(ref arg) => { arg.eq(src) }, |
4d477e23 | 174 | CC::In(ref a, ref b) => { a.ge(src) && b.le(src) }, |
b5bd2ae4 KS |
175 | CC::Lt(ref arg) => { arg.lt(src) }, |
176 | CC::Le(ref arg) => { arg.le(src) }, | |
177 | CC::Gt(ref arg) => { arg.gt(src) }, | |
178 | CC::Ge(ref arg) => { arg.ge(src) }, | |
405cec9e KS |
179 | CC::Str(strng) => { |
180 | let mut val: Vec<u8> = vec![0; strng.len()]; | |
d8ce0de0 | 181 | let res = src.peek_buf(val.as_mut_slice()); |
e243ceb4 | 182 | if res.is_err() { return false; } |
405cec9e | 183 | val == strng |
d8ce0de0 KS |
184 | } |
185 | } | |
186 | } | |
187 | } | |
188 | ||
189 | struct CheckItem<'a> { | |
190 | offs: u32, | |
b5bd2ae4 | 191 | cond: &'a CC<'a>, |
d8ce0de0 KS |
192 | } |
193 | ||
194 | #[allow(dead_code)] | |
195 | struct DetectConditions<'a> { | |
196 | demux_name: &'static str, | |
197 | extensions: &'static str, | |
198 | conditions: &'a [CheckItem<'a>], | |
199 | } | |
200 | ||
201 | const DETECTORS: &[DetectConditions] = &[ | |
202 | DetectConditions { | |
203 | demux_name: "avi", | |
204 | extensions: ".avi", | |
b5bd2ae4 KS |
205 | conditions: &[CheckItem{offs: 0, cond: &CC::Or(&CC::Str(b"RIFF"), &CC::Str(b"ON2 ")) }, |
206 | CheckItem{offs: 8, cond: &CC::Or(&CC::Or(&CC::Str(b"AVI LIST"), | |
207 | &CC::Str(b"AVIXLIST")), | |
208 | &CC::Str(b"ON2fLIST")) }, | |
209 | ] | |
d8ce0de0 | 210 | }, |
283abfa6 KS |
211 | DetectConditions { |
212 | demux_name: "wav", | |
213 | extensions: ".wav", | |
214 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"RIFF") }, | |
215 | CheckItem{offs: 8, cond: &CC::Str(b"WAVEfmt ") } | |
216 | ] | |
217 | }, | |
bdf66deb KS |
218 | DetectConditions { |
219 | demux_name: "mov", | |
220 | extensions: ".mov", | |
221 | conditions: &[CheckItem{offs: 4, cond: &CC::Or(&CC::Or(&CC::Str(b"mdat"), | |
222 | &CC::Str(b"moov")), | |
223 | &CC::Str(b"ftyp")) }], | |
224 | }, | |
225 | DetectConditions { | |
226 | demux_name: "mov", | |
227 | extensions: ".mov", | |
228 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"\x00\x00\x00\x08wide") }, | |
229 | CheckItem{offs: 12, cond: &CC::Or(&CC::Or(&CC::Str(b"mdat"), | |
230 | &CC::Str(b"moov")), | |
231 | &CC::Str(b"ftyp")) }], | |
232 | }, | |
88fd1059 KS |
233 | DetectConditions { |
234 | demux_name: "mov-macbin", | |
235 | extensions: ".mov,.bin", | |
236 | conditions: &[CheckItem{offs: 0, cond: &CC::Eq(Arg::Byte(0))}, | |
237 | CheckItem{offs: 0x41, cond: &CC::Str(b"MooV")}, | |
238 | CheckItem{offs: 0x7A, cond: &CC::Eq(Arg::Byte(0x81))}, | |
239 | CheckItem{offs: 0x7B, cond: &CC::Eq(Arg::Byte(0x81))}, | |
240 | CheckItem{offs: 0x84, cond: &CC::Str(b"mdat")}], | |
241 | }, | |
dbb2cbc9 KS |
242 | DetectConditions { |
243 | demux_name: "yuv4mpeg", | |
244 | extensions: ".y4m", | |
245 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"YUV4MPEG2 ") }], | |
246 | }, | |
92d9fb69 KS |
247 | DetectConditions { |
248 | demux_name: "flv", | |
249 | extensions: ".flv", | |
250 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"FLV") }, | |
251 | CheckItem{offs: 3, cond: &CC::Le(Arg::Byte(1)) }], | |
252 | }, | |
e01d4987 KS |
253 | DetectConditions { |
254 | demux_name: "ivf", | |
255 | extensions: ".ivf", | |
256 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(&[0x50, 0xEF, 0x81, 0x19, 0xB3, 0xBD, 0xD0, 0x11, 0xA3, 0xE5, 0x00, 0xA0, 0xC9, 0x24, 0x44])}, | |
257 | CheckItem{offs: 15, cond: &CC::Or(&CC::Eq(Arg::Byte(0x36)), &CC::Eq(Arg::Byte(0x37)))}], | |
258 | }, | |
fd7e6906 | 259 | DetectConditions { |
b8e71e0a | 260 | demux_name: "dkivf", |
fd7e6906 KS |
261 | extensions: ".ivf", |
262 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"DKIF\x00\x00")}, | |
263 | CheckItem{offs: 6, cond: &CC::Ge(Arg::U16LE(32))}], | |
264 | }, | |
1991b7da KS |
265 | DetectConditions { |
266 | demux_name: "arxel-cnm", | |
267 | extensions: ".cnm", | |
268 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"CNM UNR\x00")}], | |
269 | }, | |
8d91d85f KS |
270 | DetectConditions { |
271 | demux_name: "fcmp", | |
272 | extensions: ".cmp", | |
273 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"FCMP")}], | |
274 | }, | |
275 | DetectConditions { | |
276 | demux_name: "fst", | |
277 | extensions: ".fst", | |
278 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"2TSF")}], | |
279 | }, | |
d8ce0de0 KS |
280 | DetectConditions { |
281 | demux_name: "gdv", | |
282 | extensions: ".gdv", | |
b5bd2ae4 | 283 | conditions: &[CheckItem{offs: 0, cond: &CC::Eq(Arg::U32LE(0x29111994))}], |
d8ce0de0 | 284 | }, |
3813fe8a KS |
285 | DetectConditions { |
286 | demux_name: "fable-imax", | |
287 | extensions: ".imx", | |
288 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"IMAX") }, | |
289 | CheckItem{offs: 10, cond: &CC::Eq(Arg::U16LE(0x102)) }], | |
290 | }, | |
ff6a914f KS |
291 | DetectConditions { |
292 | demux_name: "hl-fmv", | |
293 | extensions: ".fmv", | |
294 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"FMV*") }, | |
295 | CheckItem{offs: 4, cond: &CC::Eq(Arg::U32LE(0)) }], | |
296 | }, | |
afe1e5ba KS |
297 | DetectConditions { |
298 | demux_name: "legend-q", | |
299 | extensions: ".q", | |
300 | conditions: &[CheckItem{offs: 0, cond: &CC::Eq(Arg::U16LE(0x6839))}, | |
2826a23f | 301 | CheckItem{offs: 2, cond: &CC::In(Arg::Byte(3), Arg::Byte(7))}], |
afe1e5ba | 302 | }, |
561d0f79 KS |
303 | DetectConditions { |
304 | demux_name: "siff", | |
305 | extensions: ".vb,.vbc,.fcp,.son", | |
306 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"SIFF")}, | |
307 | CheckItem{offs: 4, cond: &CC::Or( | |
308 | &CC::Or( | |
309 | &CC::Str(b"VBV1VBHD"), | |
310 | &CC::Str(b"SOUNSHDR")), | |
311 | &CC::Str(b"FCPKFCHD"))}], | |
312 | }, | |
c17769db KS |
313 | DetectConditions { |
314 | demux_name: "smush", | |
315 | extensions: ".san", | |
316 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"ANIM")}, | |
317 | CheckItem{offs: 8, cond: &CC::Str(b"AHDR")}], | |
318 | }, | |
9e08bfdd KS |
319 | DetectConditions { |
320 | demux_name: "smush-mcmp", | |
321 | extensions: ".imc", | |
322 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"MCMP")}, | |
323 | CheckItem{offs: 6, cond: &CC::Eq(Arg::Byte(0))}, | |
324 | CheckItem{offs: 7, cond: &CC::Eq(Arg::Byte(0))}], | |
325 | }, | |
c17769db KS |
326 | DetectConditions { |
327 | demux_name: "smush", | |
328 | extensions: ".snm", | |
329 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"SANM")}, | |
330 | CheckItem{offs: 8, cond: &CC::Str(b"SHDR")}], | |
331 | }, | |
ce52b3b5 KS |
332 | DetectConditions { |
333 | demux_name: "realaudio", | |
334 | extensions: ".ra,.ram", | |
335 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b".ra\xFD")}], | |
336 | }, | |
337 | DetectConditions { | |
338 | demux_name: "realmedia", | |
339 | extensions: ".rm,.rmvb,.rma,.ra,.ram", | |
db5cc44b | 340 | conditions: &[CheckItem{offs: 0, cond: &CC::Or(&CC::Str(b".RMF"), &CC::Str(b".RMP")) }, |
ce52b3b5 KS |
341 | CheckItem{offs: 4, cond: &CC::Ge(Arg::U32BE(10))}], |
342 | }, | |
343 | DetectConditions { | |
344 | demux_name: "real_ivr", | |
345 | extensions: ".ivr", | |
346 | conditions: &[CheckItem{offs: 0, cond: &CC::Or(&CC::Str(b".R1M"), &CC::Str(b".REC"))}], | |
347 | }, | |
c6c21059 KS |
348 | DetectConditions { |
349 | demux_name: "bink", | |
4d477e23 | 350 | extensions: ".bik,.bk2", |
4998874b KS |
351 | conditions: &[CheckItem{offs: 0, cond: &CC::Or(&CC::In(Arg::U32BE(0x42494B62), // BIKb |
352 | Arg::U32BE(0x42494B7B)), // BIKz | |
c6c21059 KS |
353 | &CC::In(Arg::U32BE(0x4B423261), // KB2a |
354 | Arg::U32BE(0x4B42327B)))}], // KB2z | |
355 | }, | |
606c448e KS |
356 | DetectConditions { |
357 | demux_name: "smacker", | |
358 | extensions: ".smk", | |
359 | conditions: &[CheckItem{offs: 0, cond: &CC::Or(&CC::Str(b"SMK2"), &CC::Str(b"SMK4"))}], | |
360 | }, | |
87927c57 KS |
361 | DetectConditions { |
362 | demux_name: "ape", | |
363 | extensions: ".ape", | |
364 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"MAC ") }, | |
365 | CheckItem{offs: 4, cond: &CC::In(Arg::U16LE(3800), Arg::U16LE(3990))}], | |
366 | }, | |
367 | DetectConditions { | |
368 | demux_name: "flac", | |
369 | extensions: ".flac", | |
370 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"fLaC") }], | |
371 | }, | |
372 | DetectConditions { | |
373 | demux_name: "tta", | |
374 | extensions: ".tta", | |
375 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"TTA1") }], | |
376 | }, | |
377 | DetectConditions { | |
378 | demux_name: "wavpack", | |
379 | extensions: ".wv", | |
380 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"wvpk") }, | |
381 | CheckItem{offs: 8, cond: &CC::In(Arg::U16LE(0x402), Arg::U16LE(0x410))}], | |
382 | }, | |
128253cc | 383 | DetectConditions { |
31cf33ac KS |
384 | demux_name: "vivo", |
385 | extensions: ".viv", | |
386 | conditions: &[CheckItem{offs: 0, cond: &CC::In(Arg::U16BE(1), Arg::U16BE(0xFF))}, | |
387 | CheckItem{offs: 2, cond: &CC::Str(b"\x0D\x0AVersion:Vivo/")}], | |
388 | }, | |
389 | DetectConditions { | |
390 | demux_name: "vivo", | |
391 | extensions: ".viv", | |
392 | conditions: &[CheckItem{offs: 0, cond: &CC::In(Arg::U16BE(1), Arg::U16BE(0xFF))}, | |
393 | CheckItem{offs: 3, cond: &CC::Str(b"\x0D\x0AVersion:Vivo/")}], | |
394 | }, | |
395 | DetectConditions { | |
128253cc KS |
396 | demux_name: "bmv", |
397 | extensions: ".bmv", | |
398 | conditions: &[], | |
399 | }, | |
ecda1cc1 KS |
400 | DetectConditions { |
401 | demux_name: "bmv3", | |
402 | extensions: ".bmv", | |
403 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"BMVi") }, | |
404 | CheckItem{offs: 32, cond: &CC::Str(b"DATA")}], | |
405 | }, | |
9895bd7b KS |
406 | DetectConditions { |
407 | demux_name: "vmd", | |
408 | extensions: ".vmd", | |
409 | conditions: &[], | |
410 | }, | |
55d85231 KS |
411 | DetectConditions { |
412 | demux_name: "vx", | |
413 | extensions: ".vx", | |
414 | conditions: &[CheckItem{offs: 0, cond: &CC::Str(b"VXDS") }], | |
415 | }, | |
d8ce0de0 KS |
416 | ]; |
417 | ||
1b5ebe1d KS |
418 | /// Tries to detect container format. |
419 | /// | |
420 | /// This function tries to determine container format using both file extension and checking against container specific markers inside. | |
421 | /// In case of success the function returns short container name and the detection score. | |
422 | /// Result should have the highest detection score among tested. | |
d8ce0de0 KS |
423 | pub fn detect_format(name: &str, src: &mut ByteReader) -> Option<(&'static str, DetectionScore)> { |
424 | let mut result = None; | |
425 | let lname = name.to_lowercase(); | |
426 | for detector in DETECTORS { | |
427 | let mut score = DetectionScore::No; | |
e243ceb4 | 428 | if !name.is_empty() { |
d8ce0de0 KS |
429 | for ext in detector.extensions.split(',') { |
430 | if lname.ends_with(ext) { | |
431 | score = DetectionScore::ExtensionMatches; | |
432 | break; | |
433 | } | |
434 | } | |
435 | } | |
e243ceb4 | 436 | let mut passed = !detector.conditions.is_empty(); |
d8ce0de0 | 437 | for ck in detector.conditions { |
e243ceb4 KS |
438 | let ret = src.seek(SeekFrom::Start(u64::from(ck.offs))); |
439 | if ret.is_err() { | |
d8ce0de0 KS |
440 | passed = false; |
441 | break; | |
442 | } | |
443 | if !ck.cond.eval(src) { | |
444 | passed = false; | |
445 | break; | |
446 | } | |
447 | } | |
448 | if passed { | |
449 | score = DetectionScore::MagicMatches; | |
450 | } | |
451 | if score == DetectionScore::MagicMatches { | |
452 | return Some((detector.demux_name, score)); | |
453 | } | |
4d477e23 | 454 | if result.is_none() && score != DetectionScore::No { |
d8ce0de0 | 455 | result = Some((detector.demux_name, score)); |
4d477e23 | 456 | } else if result.is_some() { |
d8ce0de0 KS |
457 | let (_, oldsc) = result.unwrap(); |
458 | if oldsc.less(score) { | |
459 | result = Some((detector.demux_name, score)); | |
460 | } | |
461 | } | |
462 | } | |
463 | result | |
464 | } | |
465 | ||
4b56e8c9 | 466 | /// Tries to detect container format for provided file name. |
ac818eac | 467 | pub fn detect_format_by_name(name: &str) -> Option<&'static str> { |
4b56e8c9 KS |
468 | if name.is_empty() { |
469 | return None; | |
470 | } | |
471 | let lname = name.to_lowercase(); | |
472 | for detector in DETECTORS { | |
473 | for ext in detector.extensions.split(',') { | |
474 | if lname.ends_with(ext) { | |
475 | return Some(detector.demux_name); | |
476 | } | |
477 | } | |
478 | } | |
479 | None | |
480 | } | |
481 | ||
d8ce0de0 KS |
482 | #[cfg(test)] |
483 | mod test { | |
484 | use super::*; | |
485 | use std::fs::File; | |
01f55c6a | 486 | use nihav_core::io::byteio::*; |
d8ce0de0 KS |
487 | |
488 | #[test] | |
489 | fn test_avi_detect() { | |
250c49f6 | 490 | let name = "assets/Indeo/laser05.avi"; |
d8ce0de0 KS |
491 | let mut file = File::open(name).unwrap(); |
492 | let mut fr = FileReader::new_read(&mut file); | |
493 | let mut br = ByteReader::new(&mut fr); | |
494 | let (name, score) = detect_format(name, &mut br).unwrap(); | |
495 | assert_eq!(name, "avi"); | |
496 | assert_eq!(score, DetectionScore::MagicMatches); | |
497 | } | |
498 | ||
499 | #[test] | |
500 | fn test_gdv_detect() { | |
250c49f6 | 501 | let name = "assets/Game/intro1.gdv"; |
d8ce0de0 KS |
502 | let mut file = File::open(name).unwrap(); |
503 | let mut fr = FileReader::new_read(&mut file); | |
504 | let mut br = ByteReader::new(&mut fr); | |
505 | let (name, score) = detect_format(name, &mut br).unwrap(); | |
506 | assert_eq!(name, "gdv"); | |
507 | assert_eq!(score, DetectionScore::MagicMatches); | |
508 | } | |
b5bd2ae4 | 509 | } |