nihav-registry/src/register.rs

   1 //! Global registry of codec information.
   2 //!
   3 //! This module contains codec information from technical level that allows user to retrieve information about codec type and features without creating and invoking a decoder for such codec.
   4 use std::fmt;
   5
   6 /// Codec types.
   7 #[derive(Debug,Clone,Copy,PartialEq)]
   8 #[allow(dead_code)]
   9 pub enum CodecType {
  10     /// Video codec.
  11     Video,
  12     /// Audio codec.
  13     Audio,
  14     /// Subtitle codec.
  15     Subtitles,
  16     /// Some special codec (e.g. some event stream or separate timecodes stream).
  17     Data,
  18     /// Dummy codec.
  19     None,
  20 }
  21
  22 impl fmt::Display for CodecType {
  23     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  24         match *self {
  25             CodecType::Video => write!(f, "Video"),
  26             CodecType::Audio => write!(f, "Audio"),
  27             CodecType::Subtitles => write!(f, "Subtitles"),
  28             CodecType::Data => write!(f, "Data"),
  29             CodecType::None => write!(f, "-"),
  30         }
  31     }
  32 }
  33
  34 /// Codec capability flag for intra-only codecs.
  35 pub const CODEC_CAP_INTRAONLY:u32   = 0x0001;
  36 /// Codec capability flag for lossless codecs.
  37 pub const CODEC_CAP_LOSSLESS:u32    = 0x0002;
  38 /// Codec capability flag for codecs with frame reordering.
  39 pub const CODEC_CAP_REORDER:u32     = 0x0004;
  40 /// Codec capability flag for codecs that can be both lossy and lossless.
  41 pub const CODEC_CAP_HYBRID:u32      = 0x0008;
  42 /// Codec capability flag for codecs with scalability features.
  43 pub const CODEC_CAP_SCALABLE:u32    = 0x0010;
  44 /// Codec capability flag for codecs with complex frame reordering.
  45 pub const CODEC_CAP_COMPLEX_REORDER:u32 = 0x0020;
  46
  47 /// Codec description structure.
  48 #[derive(Clone)]
  49 pub struct CodecDescription {
  50     /// Short codec name.
  51     ///
  52     /// Short codec name is used inside NihAV as the unique identifier.
  53     pub name:  &'static str,
  54     /// Full codec name.
  55     pub fname: &'static str,
  56     /// Codec type.
  57     pub ctype: CodecType,
  58     /// Codec capabilities.
  59     pub caps:  u32,
  60 }
  61
  62 impl CodecDescription {
  63     /// Returns short codec name.
  64     pub fn get_name(&self) -> &'static str { self.name }
  65     /// Returns full codec name.
  66     pub fn get_full_name(&self) -> &'static str { self.fname }
  67     /// Returns codec type.
  68     pub fn get_codec_type(&self) -> CodecType { self.ctype }
  69     /// Reports whether the codec has only intra frames or not.
  70     pub fn is_intraonly(&self) -> bool { (self.caps & CODEC_CAP_INTRAONLY) != 0 }
  71     /// Reports whether the codec is lossless.
  72     pub fn is_lossless(&self)  -> bool { (self.caps & CODEC_CAP_LOSSLESS)  != 0 }
  73     /// Reports whether the codec requires frame reordering.
  74     pub fn has_reorder(&self)  -> bool { (self.caps & CODEC_CAP_REORDER)   != 0 }
  75     /// Reports whether the codec can be either lossless or lossy.
  76     pub fn is_hybrid(&self)    -> bool { (self.caps & CODEC_CAP_HYBRID)    != 0 }
  77     /// Reports whether codec supports scalability.
  78     ///
  79     /// Scalability means that codec can be decoded in reduced resolution by design.
  80     pub fn is_scalable(&self)  -> bool { (self.caps & CODEC_CAP_SCALABLE)  != 0 }
  81 }
  82
  83 impl fmt::Display for CodecDescription {
  84     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  85         let mut out = self.fname.to_string();
  86         if self.caps != 0 {
  87             let mut capfmt = "".to_string();
  88             if (self.caps & CODEC_CAP_INTRAONLY) != 0 {
  89                 capfmt = format!("{} Intra-only", capfmt);
  90             }
  91             if (self.caps & CODEC_CAP_LOSSLESS) != 0 {
  92                 capfmt = format!("{} Lossless", capfmt);
  93             }
  94             if (self.caps & CODEC_CAP_REORDER) != 0 {
  95                 capfmt = format!("{} Frame reorder", capfmt);
  96             }
  97             if (self.caps & CODEC_CAP_HYBRID) != 0 {
  98                 capfmt = format!("{} Can be lossy and lossless", capfmt);
  99             }
 100             if (self.caps & CODEC_CAP_SCALABLE) != 0 {
 101                 capfmt = format!("{} Scalable", capfmt);
 102             }
 103             out = format!("{} ({})", out, capfmt);
 104         }
 105         write!(f, "{}", out)
 106     }
 107 }
 108
 109 macro_rules! desc {
 110     (video; $n:expr, $fn:expr) => ({
 111         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Video,
 112                           caps: 0 }
 113     });
 114     (video; $n:expr, $fn:expr, $c:expr) => ({
 115         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Video,
 116                           caps: $c }
 117     });
 118     (video-ll; $n:expr, $fn:expr) => ({
 119         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Video,
 120                           caps: CODEC_CAP_LOSSLESS | CODEC_CAP_INTRAONLY }
 121     });
 122     (video-llp; $n:expr, $fn:expr) => ({
 123         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Video,
 124                           caps: CODEC_CAP_LOSSLESS }
 125     });
 126     (video-im; $n:expr, $fn:expr) => ({
 127         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Video,
 128                           caps: CODEC_CAP_INTRAONLY }
 129     });
 130     (video-modern; $n:expr, $fn:expr) => ({
 131         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Video,
 132                           caps: CODEC_CAP_REORDER | CODEC_CAP_HYBRID }
 133     });
 134     (audio; $n:expr, $fn:expr) => ({
 135         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Audio,
 136                           caps: 0 }
 137     });
 138     (audio-ll; $n:expr, $fn:expr) => ({
 139         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Audio,
 140                           caps: CODEC_CAP_LOSSLESS | CODEC_CAP_INTRAONLY }
 141     });
 142     (audio-hyb; $n:expr, $fn:expr) => ({
 143         CodecDescription{ name: $n, fname: $fn, ctype: CodecType::Audio,
 144                           caps: CODEC_CAP_HYBRID }
 145     });
 146 }
 147
 148 /// Returns codec description for the provided codec short name if it is found.
 149 pub fn get_codec_description(name: &str) -> Option<&'static CodecDescription> {
 150     CODEC_REGISTER.iter().find(|&reg| reg.name == name)
 151 }
 152
 153 static CODEC_REGISTER: &[CodecDescription] = &[
 154     desc!(audio-ll; "pcm", "PCM"),
 155     desc!(audio;    "alaw", "A-law PCM"),
 156     desc!(audio;    "ulaw", "mu-law PCM"),
 157
 158     desc!(video-im; "indeo1", "Intel Raw IF09"),
 159     desc!(video-im; "indeo2", "Intel Indeo 2"),
 160     desc!(video;    "indeo3", "Intel Indeo 3"),
 161     desc!(video;    "indeo4", "Intel Indeo 4", CODEC_CAP_REORDER | CODEC_CAP_SCALABLE),
 162     desc!(video;    "indeo5", "Intel Indeo 5", CODEC_CAP_REORDER | CODEC_CAP_SCALABLE),
 163     desc!(video;    "indeo5s", "Intel Indeo 5 Scalable", CODEC_CAP_SCALABLE),
 164     desc!(video;    "intel263", "Intel I263", CODEC_CAP_REORDER),
 165     desc!(audio;    "iac",    "Intel Indeo audio"),
 166     desc!(audio;    "imc",    "Intel Music Coder"),
 167
 168     desc!(video;    "realvideo1", "Real Video 1"),
 169     desc!(video;    "realvideo2", "Real Video 2", CODEC_CAP_REORDER),
 170     desc!(video;    "realvideo3", "Real Video 3", CODEC_CAP_REORDER),
 171     desc!(video;    "realvideo4", "Real Video 4", CODEC_CAP_REORDER),
 172     desc!(video;    "realvideo6", "Real Video 6", CODEC_CAP_REORDER),
 173     desc!(video;    "clearvideo", "ClearVideo"),
 174     desc!(video;    "clearvideo_rm", "ClearVideo"),
 175     desc!(audio;    "ra14.4",     "RealAudio 14.4"),
 176     desc!(audio;    "ra28.8",     "RealAudio 28.8"),
 177     desc!(audio;    "cook",       "RealAudio Cooker"),
 178     desc!(audio;    "ralf",       "RealAudio Lossless"),
 179     desc!(audio;    "aac",        "AAC"),
 180     desc!(audio;    "ac3",        "ETSI TS 102 366"),
 181     desc!(audio;    "atrac3",     "Sony Atrac3"),
 182     desc!(audio;    "sipro",      "Sipro Labs ADPCM"),
 183
 184
 185     desc!(video-ll; "rawvideo",   "Raw video data"),
 186     desc!(video-ll; "rawvideo-ms", "Raw video data"),
 187
 188     desc!(video;    "cinepak",    "Cinepak"),
 189
 190     desc!(video-llp; "zmbv",      "Zip Motion Blocks Video"),
 191
 192     desc!(video;    "msvideo1",      "MS Video 1"),
 193     desc!(video;    "msrle",         "MS RLE"),
 194     desc!(audio;    "ms-adpcm",      "MS ADPCM"),
 195     desc!(audio;    "ima-adpcm-ms",  "IMA ADPCM (MS variant)"),
 196
 197     desc!(video;    "qt-smc",               "Apple Graphics"),
 198     desc!(video;    "qt-rle",               "Apple Animation"),
 199     desc!(video;    "apple-video",          "Apple video"),
 200     desc!(video;    "sorenson-video",       "Sorenson Video"),
 201     desc!(video;    "sorenson-video3",      "Sorenson Video 3", CODEC_CAP_REORDER),
 202     desc!(audio-ll; "alac",                 "Apple Lossless Audio Codec"),
 203     desc!(audio;    "mace-3",               "MACE 3:1"),
 204     desc!(audio;    "mace-6",               "MACE 6:1"),
 205     desc!(audio;    "ima-adpcm-qt",         "IMA ADPCM (Apple variant)"),
 206     desc!(audio;    "qdesign-music",        "QDesign Music"),
 207     desc!(audio;    "qdesign-music2",       "QDesign Music v2"),
 208     desc!(audio;    "qualcomm-purevoice",   "Qualcomm PureVoice"),
 209
 210     desc!(video;    "movinglines",          "Acorn Moving Lines"),
 211     desc!(video;    "movingblocks",         "Acorn Moving Blocks"),
 212     desc!(video;    "movingblockshq",       "Acorn Moving Blocks HQ"),
 213     desc!(video;    "supermovingblocks",    "Acorn Super Moving Blocks"),
 214     desc!(video;    "linepack",             "Henrik Pedersen's LinePack"),
 215     desc!(video;    "movie16_3",            "Henrik Pedersen's Movie 16:3"),
 216     desc!(video;    "escape100",            "Eidos Escape 100"),
 217     desc!(video;    "escape102",            "Eidos Escape 102"),
 218     desc!(video;    "escape122",            "Eidos Escape 122"),
 219     desc!(video;    "escape124",            "Eidos Escape 124"),
 220     desc!(video;    "escape130",            "Eidos Escape 130"),
 221
 222     desc!(video;    "truemotion1",   "TrueMotion 1"),
 223     desc!(video-im; "truemotionrt",  "TrueMotion RT"),
 224     desc!(video;    "truemotion2",   "TrueMotion 2"),
 225     desc!(video;    "truemotion2x",  "TrueMotion 2X"),
 226     desc!(video;    "vp3",           "VP3"),
 227     desc!(video;    "vp4",           "VP4"),
 228     desc!(video;    "vp5",           "VP5"),
 229     desc!(video;    "vp6",           "VP6"),
 230     desc!(video;    "vp6f",          "VP6 (in Flash)"),
 231     desc!(video;    "vp6a",          "VP6 with alpha"),
 232     desc!(video;    "vp7",           "VP7"),
 233     desc!(video;    "vp8",           "VP8"),
 234     desc!(video;    "vp9",           "VP9"),
 235     desc!(audio;    "adpcm-dk3",     "Duck DK3 ADPCM"),
 236     desc!(audio;    "adpcm-dk4",     "Duck DK4 ADPCM"),
 237     desc!(audio;    "on2avc-500",    "On2 AVC"),
 238     desc!(audio;    "on2avc-501",    "On2 AVC"),
 239
 240     desc!(video;     "flv263",       "Sorenson H.263"),
 241     desc!(video-llp; "flashsv",      "Flash Screen Video"),
 242     desc!(video-llp; "flashsv2",     "Flash Screen Video 2"),
 243     desc!(audio;     "asao",         "N*llym*s*r ASAO"),
 244     desc!(audio;     "flv-adpcm",    "Flash ADPCM"),
 245
 246     desc!(audio;     "mp1",          "MPEG Audio Layer I"),
 247     desc!(audio;     "mp2",          "MPEG Audio Layer II"),
 248     desc!(audio;     "mp3",          "MPEG Audio Layer III"),
 249     desc!(audio;     "speex",        "Speex"),
 250
 251     desc!(video;    "gdv-video",     "Gremlin Digital Video - video"),
 252     desc!(audio;    "gdv-audio",     "Gremlin Digital Video - audio"),
 253     desc!(video-im; "arxel-video",   "Arxel Tribe Video"),
 254     desc!(video;    "beam-fcp",      "Beam Software Animation"),
 255     desc!(video;    "beam-video",    "Beam Software Video"),
 256     desc!(video;    "bmv-video",     "BMV video"),
 257     desc!(audio;    "bmv-audio",     "BMV audio"),
 258     desc!(video;    "bmv3-video",    "DW Noir BMV video"),
 259     desc!(audio;    "bmv3-audio",    "DW Noir BMV audio"),
 260     desc!(video;    "dp-sga",        "Digital Pictures SGA video"),
 261     desc!(video;    "fable-imax",    "Fable IMAX video"),
 262     desc!(video;    "fst-video",     "FutureVision video"),
 263     desc!(audio;    "fst-audio",     "FutureVision audio"),
 264     desc!(video;    "hl-fmv-video",  "Highlander FMV video"),
 265     desc!(video-llp; "ipma",         "Imagination Pilots Matte Animation"),
 266     desc!(video-llp; "ipma2",        "Imagination Pilots Matte Animation v2"),
 267     desc!(video;    "legend-q-video", "Legend Entertainment Q video"),
 268     desc!(video;    "midivid",       "MidiVid"),
 269     desc!(video;    "midivid3",      "MidiVid 3"),
 270     desc!(video-ll; "midivid-ll",    "MidiVid Lossless"),
 271     desc!(video;    "smushv1",       "SMUSH Video paletted"),
 272     desc!(video;    "smushv2",       "SMUSH Video 16-bit"),
 273     desc!(video;    "smush-iact",    "SMUSH IACT Audio"),
 274     desc!(video;    "smush-vima",    "SMUSH VIMA Audio"),
 275     desc!(video;    "vmd-video",     "VMD video"),
 276     desc!(audio;    "vmd-audio",     "VMD audio"),
 277     desc!(video;    "vxvideo",       "Actimagine Vx"),
 278     desc!(audio;    "vxaudio",       "Actimagine Sx"),
 279
 280     desc!(video;    "smacker-video", "Smacker video"),
 281     desc!(audio;    "smacker-audio", "Smacker audio"),
 282     desc!(video;    "bink-video",    "Bink video"),
 283     desc!(video;    "bink2-video",   "Bink2 video"),
 284     desc!(audio;    "bink-audio-dct",   "Bink audio (DCT)"),
 285     desc!(audio;    "bink-audio-rdft",  "Bink audio (RDFT)"),
 286
 287     desc!(audio;    "lhst15f8",      "L&H StreamTalk 15kbps at 8 kHz"),
 288     desc!(audio;    "lhst250f11",    "L&H StreamTalk 25kbps at 11 kHz"),
 289     desc!(audio;    "lhst500f22",    "L&H StreamTalk 50kpbs at 22 kHz"),
 290     desc!(audio;    "lhst48",        "L&H StreamTalk CELP Codec 4.8kbps at 8 kHz"),
 291
 292     desc!(video;    "vivo1",         "VivoActive Video 1.0"),
 293     desc!(video;    "vivo2",         "VivoActive Video 2.0", CODEC_CAP_REORDER),
 294     desc!(audio;    "g723.1",        "ITU G.723.1"),
 295     desc!(audio;    "siren",         "Polycom Siren"),
 296
 297     desc!(audio-ll;  "ape",          "Monkey's Audio"),
 298     desc!(audio-ll;  "flac",         "Free Lossless Audio Codec"),
 299     desc!(audio-ll;  "tta",          "True Audio codec"),
 300     desc!(audio-hyb; "wavpack",      "WavPack"),
 301
 302     desc!(video-ll; "gif",           "GIF"),
 303     desc!(video-im; "jpeg",          "JPEG"),
 304     desc!(video;    "h264",          "ITU H.264", CODEC_CAP_COMPLEX_REORDER | CODEC_CAP_HYBRID),
 305
 306     desc!(video-im; "mwv1",          "Aware MotionWavelets"),
 307 ];
 308
 309 static AVI_VIDEO_CODEC_REGISTER: &[(&[u8;4], &str)] = &[
 310     (&[1, 0, 0, 0], "msrle"),
 311     (&[2, 0, 0, 0], "msrle"),
 312
 313     (b"CRAM", "msvideo1"),
 314     (b"MSVC", "msvideo1"),
 315     (b"WHAM", "msvideo1"),
 316
 317     (b"MJPG", "jpeg"),
 318
 319     (b"IF09", "indeo1"),
 320     (b"RT21", "indeo2"),
 321     (b"IV31", "indeo3"),
 322     (b"IV32", "indeo3"),
 323     (b"IV41", "indeo4"),
 324     (b"IV50", "indeo5"),
 325     (b"I263", "intel263"),
 326
 327     (b"UCOD", "clearvideo"),
 328     (b"cvid", "cinepak"),
 329     (b"ZMBV", "zmbv"),
 330
 331     (b"Ipma", "ipma"),
 332     (b"Ip20", "ipma2"),
 333
 334     (b"MVDV", "midivid"),
 335     (b"MV30", "midivid3"),
 336     (b"MVLZ", "midivid-ll"),
 337
 338     (b"DUCK", "truemotion1"),
 339     (b"TR20", "truemotionrt"),
 340     (b"TM20", "truemotion2"),
 341     (b"TM2A", "truemotion2x"),
 342     (b"TM2X", "truemotion2x"),
 343     (b"VP30", "vp3"),
 344     (b"VP31", "vp3"),
 345     (b"VP40", "vp4"),
 346     (b"VP50", "vp5"),
 347     (b"VP60", "vp6"),
 348     (b"VP61", "vp6"),
 349     (b"VP62", "vp6"),
 350     (b"VP6A", "vp6a"),
 351     (b"VP70", "vp7"),
 352
 353     (b"MWV1", "mwv1"),
 354 ];
 355
 356 static WAV_CODEC_REGISTER: &[(u16, &str)] = &[
 357     (0x0000, "unknown"),
 358     (0x0001, "pcm"),
 359     (0x0002, "ms-adpcm"),
 360     (0x0003, "pcm"),
 361     (0x0011, "ima-adpcm-ms"),
 362     (0x0061, "adpcm-dk4"),
 363     (0x0062, "adpcm-dk3"),
 364     (0x0401, "imc"),
 365     (0x0402, "iac"),
 366     (0x0500, "on2avc-500"),
 367     (0x0501, "on2avc-501"),
 368 ];
 369
 370 static MOV_VIDEO_CODEC_REGISTER: &[(&[u8;4], &str)] = &[
 371     (b"cvid", "cinepak"),
 372     (b"jpeg", "jpeg"),
 373     //(b"raw ", "raw"),
 374     //(b"Yuv2", "raw"),
 375     (b"smc ", "qt-smc"),
 376     (b"rle ", "qt-rle"),
 377     (b"rpza", "apple-video"),
 378     (b"kpcd", "kodak-photocd"),
 379     //(b"mpeg", "mpeg-video"),
 380     (b"mjpa", "mjpeg-a"),
 381     (b"mjpb", "mjpeg-b"),
 382     (b"svqi", "sorenson-video"),
 383     (b"SVQ1", "sorenson-video"),
 384     (b"svq3", "sorenson-video3"),
 385     (b"SVQ3", "sorenson-video3"),
 386
 387     (b"IV31", "indeo3"),
 388     (b"IV32", "indeo3"),
 389
 390     (b"UCOD", "clearvideo"),
 391
 392     (b"VP30", "vp3"),
 393     (b"VP31", "vp3"),
 394
 395     (b"avc1", "h264"),
 396 ];
 397
 398 static MOV_AUDIO_CODEC_REGISTER: &[(&[u8;4], &str)] = &[
 399     (b"NONE", "pcm"),
 400     (b"raw ", "pcm"),
 401     (b"twos", "pcm"),
 402     (b"sowt", "pcm"),
 403     (b"fl32", "pcm"),
 404     (b"fl64", "pcm"),
 405     (b"in24", "pcm"),
 406     (b"in32", "pcm"),
 407     (b"MAC3", "mace-3"),
 408     (b"MAC6", "mace-6"),
 409     (b"ima4", "ima-adpcm-qt"),
 410     (b"ulaw", "ulaw"),
 411     (b"alaw", "alaw"),
 412     (b"dvca", "dv-audio"),
 413     (b"QDMC", "qdesign-music"),
 414     (b"QDM2", "qdesign-music2"),
 415     (b"Qclp", "qualcomm-purevoice"),
 416     //(b".mp3", "mpeg-layer3"),
 417
 418     (b"mp4a", "aac"),
 419
 420     (b"alac", "alac"),
 421 ];
 422
 423 /// Returns video codec short name for provided FOURCC (used in AVI format).
 424 pub fn find_codec_from_avi_fourcc(fcc: &[u8;4]) -> Option<&'static str> {
 425     for (fourcc, name) in AVI_VIDEO_CODEC_REGISTER.iter() {
 426         if *fourcc == fcc { return Some(name); }
 427     }
 428     None
 429 }
 430
 431 /// Returns FOURCC (used in AVI format) for provided codec name.
 432 pub fn find_avi_fourcc(codecname: &str) -> Option<[u8; 4]> {
 433     for (fourcc, name) in AVI_VIDEO_CODEC_REGISTER.iter() {
 434         if *name == codecname { return Some(**fourcc); }
 435     }
 436     None
 437 }
 438
 439 /// Returns known audio codec short name for provided TWOCC (used in WAV and AVI format).
 440 pub fn find_codec_from_wav_twocc(tcc: u16) -> Option<&'static str> {
 441     for (twocc, name) in WAV_CODEC_REGISTER.iter() {
 442         if *twocc == tcc { return Some(name); }
 443     }
 444     None
 445 }
 446
 447 /// Returns TWOCC (used in WAV and AVI format for provided codec name.
 448 pub fn find_wav_twocc(codecname: &str) -> Option<u16> {
 449     for (twocc, name) in WAV_CODEC_REGISTER.iter() {
 450         if *name == codecname { return Some(*twocc); }
 451     }
 452     None
 453 }
 454
 455 /// Returns video codec short name for provided FOURCC (used in MOV format).
 456 pub fn find_codec_from_mov_video_fourcc(fcc: &[u8;4]) -> Option<&'static str> {
 457     for (fourcc, name) in MOV_VIDEO_CODEC_REGISTER.iter() {
 458         if *fourcc == fcc { return Some(name); }
 459     }
 460     None
 461 }
 462
 463 /// Returns known audio codec short name for provided FOURCC (used in MOV format).
 464 pub fn find_codec_from_mov_audio_fourcc(fcc: &[u8;4]) -> Option<&'static str> {
 465     for (fourcc, name) in MOV_AUDIO_CODEC_REGISTER.iter() {
 466         if *fourcc == fcc { return Some(name); }
 467     }
 468     None
 469 }
 470
 471 #[cfg(test)]
 472 mod test {
 473     use super::*;
 474
 475     #[test]
 476     fn test_register() {
 477         let c1 = find_codec_from_avi_fourcc(b"IV41").unwrap();
 478         let c2 = find_codec_from_wav_twocc(0x401).unwrap();
 479         println!("found {} and {}", c1, c2);
 480         let cd1 = get_codec_description(c1).unwrap();
 481         let cd2 = get_codec_description(c2).unwrap();
 482         println!("got {} and {}", cd1, cd2);
 483     }
 484 }