src/frame.rs

   1 use std::cmp::max;
   2 use std::collections::HashMap;
   3 use std::fmt;
   4 use std::rc::Rc;
   5 use std::cell::*;
   6 use formats::*;
   7
   8 #[allow(dead_code)]
   9 #[derive(Clone,Copy,PartialEq)]
  10 pub struct NAAudioInfo {
  11     sample_rate: u32,
  12     channels:    u8,
  13     format:      NASoniton,
  14     block_len:   usize,
  15 }
  16
  17 impl NAAudioInfo {
  18     pub fn new(sr: u32, ch: u8, fmt: NASoniton, bl: usize) -> Self {
  19         NAAudioInfo { sample_rate: sr, channels: ch, format: fmt, block_len: bl }
  20     }
  21     pub fn get_sample_rate(&self) -> u32 { self.sample_rate }
  22     pub fn get_channels(&self) -> u8 { self.channels }
  23     pub fn get_format(&self) -> NASoniton { self.format }
  24     pub fn get_block_len(&self) -> usize { self.block_len }
  25 }
  26
  27 impl fmt::Display for NAAudioInfo {
  28     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  29         write!(f, "{} Hz, {} ch", self.sample_rate, self.channels)
  30     }
  31 }
  32
  33 #[allow(dead_code)]
  34 #[derive(Clone,Copy,PartialEq)]
  35 pub struct NAVideoInfo {
  36     width:      usize,
  37     height:     usize,
  38     flipped:    bool,
  39     format:     NAPixelFormaton,
  40 }
  41
  42 impl NAVideoInfo {
  43     pub fn new(w: usize, h: usize, flip: bool, fmt: NAPixelFormaton) -> Self {
  44         NAVideoInfo { width: w, height: h, flipped: flip, format: fmt }
  45     }
  46     pub fn get_width(&self)  -> usize { self.width as usize }
  47     pub fn get_height(&self) -> usize { self.height as usize }
  48     pub fn is_flipped(&self) -> bool { self.flipped }
  49     pub fn get_format(&self) -> NAPixelFormaton { self.format }
  50 }
  51
  52 impl fmt::Display for NAVideoInfo {
  53     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  54         write!(f, "{}x{}", self.width, self.height)
  55     }
  56 }
  57
  58 #[derive(Clone,Copy,PartialEq)]
  59 pub enum NACodecTypeInfo {
  60     None,
  61     Audio(NAAudioInfo),
  62     Video(NAVideoInfo),
  63 }
  64
  65 impl NACodecTypeInfo {
  66     pub fn get_video_info(&self) -> Option<NAVideoInfo> {
  67         match *self {
  68             NACodecTypeInfo::Video(vinfo) => Some(vinfo),
  69             _ => None,
  70         }
  71     }
  72     pub fn get_audio_info(&self) -> Option<NAAudioInfo> {
  73         match *self {
  74             NACodecTypeInfo::Audio(ainfo) => Some(ainfo),
  75             _ => None,
  76         }
  77     }
  78 }
  79
  80 impl fmt::Display for NACodecTypeInfo {
  81     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
  82         let ret = match *self {
  83             NACodecTypeInfo::None       => format!(""),
  84             NACodecTypeInfo::Audio(fmt) => format!("{}", fmt),
  85             NACodecTypeInfo::Video(fmt) => format!("{}", fmt),
  86         };
  87         write!(f, "{}", ret)
  88     }
  89 }
  90
  91 pub type NABufferRefT<T> = Rc<RefCell<Vec<T>>>;
  92
  93 #[derive(Clone)]
  94 pub struct NAVideoBuffer<T> {
  95     info:   NAVideoInfo,
  96     data:   NABufferRefT<T>,
  97     offs:   Vec<usize>,
  98 }
  99
 100 impl<T: Clone> NAVideoBuffer<T> {
 101     pub fn get_offset(&self, idx: usize) -> usize {
 102         if idx >= self.offs.len() { 0 }
 103         else { self.offs[idx] }
 104     }
 105     pub fn get_info(&self) -> NAVideoInfo { self.info }
 106     pub fn get_data(&self) -> Ref<Vec<T>> { self.data.borrow() }
 107     pub fn get_data_mut(&mut self) -> RefMut<Vec<T>> { self.data.borrow_mut() }
 108     pub fn copy_buffer(&mut self) -> Self {
 109         let mut data: Vec<T> = Vec::with_capacity(self.data.borrow().len());
 110         data.clone_from(self.data.borrow().as_ref());
 111         let mut offs: Vec<usize> = Vec::with_capacity(self.offs.len());
 112         offs.clone_from(&self.offs);
 113         NAVideoBuffer { info: self.info, data: Rc::new(RefCell::new(data)), offs: offs }
 114     }
 115     pub fn get_stride(&self, idx: usize) -> usize {
 116         if idx >= self.info.get_format().get_num_comp() { return 0; }
 117         self.info.get_format().get_chromaton(idx).unwrap().get_linesize(self.info.get_width())
 118     }
 119     pub fn get_dimensions(&self, idx: usize) -> (usize, usize) {
 120         get_plane_size(&self.info, idx)
 121     }
 122 }
 123
 124 #[derive(Clone)]
 125 pub struct NAAudioBuffer<T> {
 126     info:   NAAudioInfo,
 127     data:   NABufferRefT<T>,
 128     offs:   Vec<usize>,
 129     chmap:  NAChannelMap,
 130 }
 131
 132 impl<T: Clone> NAAudioBuffer<T> {
 133     pub fn get_offset(&self, idx: usize) -> usize {
 134         if idx >= self.offs.len() { 0 }
 135         else { self.offs[idx] }
 136     }
 137     pub fn get_info(&self) -> NAAudioInfo { self.info }
 138     pub fn get_chmap(&self) -> NAChannelMap { self.chmap.clone() }
 139     pub fn get_data(&self) -> Ref<Vec<T>> { self.data.borrow() }
 140     pub fn get_data_mut(&mut self) -> RefMut<Vec<T>> { self.data.borrow_mut() }
 141     pub fn copy_buffer(&mut self) -> Self {
 142         let mut data: Vec<T> = Vec::with_capacity(self.data.borrow().len());
 143         data.clone_from(self.data.borrow().as_ref());
 144         let mut offs: Vec<usize> = Vec::with_capacity(self.offs.len());
 145         offs.clone_from(&self.offs);
 146         NAAudioBuffer { info: self.info, data: Rc::new(RefCell::new(data)), offs: offs, chmap: self.get_chmap() }
 147     }
 148 }
 149
 150 impl NAAudioBuffer<u8> {
 151     pub fn new_from_buf(info: NAAudioInfo, data: NABufferRefT<u8>, chmap: NAChannelMap) -> Self {
 152         NAAudioBuffer { info: info, data: data, chmap: chmap, offs: Vec::new() }
 153     }
 154 }
 155
 156 #[derive(Clone)]
 157 pub enum NABufferType {
 158     Video      (NAVideoBuffer<u8>),
 159     Video16    (NAVideoBuffer<u16>),
 160     VideoPacked(NAVideoBuffer<u8>),
 161     AudioU8    (NAAudioBuffer<u8>),
 162     AudioI16   (NAAudioBuffer<i16>),
 163     AudioI32   (NAAudioBuffer<i32>),
 164     AudioF32   (NAAudioBuffer<f32>),
 165     AudioPacked(NAAudioBuffer<u8>),
 166     Data       (NABufferRefT<u8>),
 167     None,
 168 }
 169
 170 impl NABufferType {
 171     pub fn get_offset(&self, idx: usize) -> usize {
 172         match *self {
 173             NABufferType::Video(ref vb)       => vb.get_offset(idx),
 174             NABufferType::Video16(ref vb)     => vb.get_offset(idx),
 175             NABufferType::VideoPacked(ref vb) => vb.get_offset(idx),
 176             NABufferType::AudioU8(ref ab)     => ab.get_offset(idx),
 177             NABufferType::AudioI16(ref ab)    => ab.get_offset(idx),
 178             NABufferType::AudioF32(ref ab)    => ab.get_offset(idx),
 179             NABufferType::AudioPacked(ref ab) => ab.get_offset(idx),
 180             _ => 0,
 181         }
 182     }
 183     pub fn get_vbuf(&mut self) -> Option<NAVideoBuffer<u8>> {
 184         match *self {
 185             NABufferType::Video(ref vb)       => Some(vb.clone()),
 186             NABufferType::VideoPacked(ref vb) => Some(vb.clone()),
 187             _ => None,
 188         }
 189     }
 190     pub fn get_vbuf16(&mut self) -> Option<NAVideoBuffer<u16>> {
 191         match *self {
 192             NABufferType::Video16(ref vb)     => Some(vb.clone()),
 193             _ => None,
 194         }
 195     }
 196     pub fn get_abuf_u8(&mut self) -> Option<NAAudioBuffer<u8>> {
 197         match *self {
 198             NABufferType::AudioU8(ref ab) => Some(ab.clone()),
 199             NABufferType::AudioPacked(ref ab) => Some(ab.clone()),
 200             _ => None,
 201         }
 202     }
 203     pub fn get_abuf_i16(&mut self) -> Option<NAAudioBuffer<i16>> {
 204         match *self {
 205             NABufferType::AudioI16(ref ab) => Some(ab.clone()),
 206             _ => None,
 207         }
 208     }
 209     pub fn get_abuf_i32(&mut self) -> Option<NAAudioBuffer<i32>> {
 210         match *self {
 211             NABufferType::AudioI32(ref ab) => Some(ab.clone()),
 212             _ => None,
 213         }
 214     }
 215     pub fn get_abuf_f32(&mut self) -> Option<NAAudioBuffer<f32>> {
 216         match *self {
 217             NABufferType::AudioF32(ref ab) => Some(ab.clone()),
 218             _ => None,
 219         }
 220     }
 221 }
 222
 223 #[derive(Debug,Clone,Copy,PartialEq)]
 224 pub enum AllocatorError {
 225     TooLargeDimensions,
 226     FormatError,
 227 }
 228
 229 pub fn alloc_video_buffer(vinfo: NAVideoInfo, align: u8) -> Result<NABufferType, AllocatorError> {
 230     let fmt = &vinfo.format;
 231     let mut new_size: usize = 0;
 232     let mut offs: Vec<usize> = Vec::new();
 233
 234     for i in 0..fmt.get_num_comp() {
 235         if fmt.get_chromaton(i) == None { return Err(AllocatorError::FormatError); }
 236     }
 237
 238     let align_mod = ((1 << align) as usize) - 1;
 239     let width  = ((vinfo.width  as usize) + align_mod) & !align_mod;
 240     let height = ((vinfo.height as usize) + align_mod) & !align_mod;
 241     let mut max_depth = 0;
 242     let mut all_packed = true;
 243     for i in 0..fmt.get_num_comp() {
 244         let chr = fmt.get_chromaton(i).unwrap();
 245         if !chr.is_packed() {
 246             all_packed = false;
 247             break;
 248         }
 249         max_depth = max(max_depth, chr.get_depth());
 250     }
 251
 252 //todo semi-packed like NV12
 253     if !all_packed {
 254         for i in 0..fmt.get_num_comp() {
 255             let chr = fmt.get_chromaton(i).unwrap();
 256             if !vinfo.is_flipped() {
 257                 offs.push(new_size as usize);
 258             }
 259             let cur_w = chr.get_width(width);
 260             let cur_h = chr.get_height(height);
 261             let cur_sz = cur_w.checked_mul(cur_h);
 262             if cur_sz == None { return Err(AllocatorError::TooLargeDimensions); }
 263             let new_sz = new_size.checked_add(cur_sz.unwrap());
 264             if new_sz == None { return Err(AllocatorError::TooLargeDimensions); }
 265             new_size = new_sz.unwrap();
 266             if vinfo.is_flipped() {
 267                 offs.push(new_size as usize);
 268             }
 269         }
 270         if max_depth <= 8 {
 271             let mut data: Vec<u8> = Vec::with_capacity(new_size);
 272             data.resize(new_size, 0);
 273             let buf: NAVideoBuffer<u8> = NAVideoBuffer { data: Rc::new(RefCell::new(data)), info: vinfo, offs: offs };
 274             Ok(NABufferType::Video(buf))
 275         } else {
 276             let mut data: Vec<u16> = Vec::with_capacity(new_size);
 277             data.resize(new_size, 0);
 278             let buf: NAVideoBuffer<u16> = NAVideoBuffer { data: Rc::new(RefCell::new(data)), info: vinfo, offs: offs };
 279             Ok(NABufferType::Video16(buf))
 280         }
 281     } else {
 282         let elem_sz = fmt.get_elem_size();
 283         let line_sz = width.checked_mul(elem_sz as usize);
 284         if line_sz == None { return Err(AllocatorError::TooLargeDimensions); }
 285         let new_sz = line_sz.unwrap().checked_mul(height);
 286         if new_sz == None { return Err(AllocatorError::TooLargeDimensions); }
 287         new_size = new_sz.unwrap();
 288         let mut data: Vec<u8> = Vec::with_capacity(new_size);
 289         data.resize(new_size, 0);
 290         let buf: NAVideoBuffer<u8> = NAVideoBuffer { data: Rc::new(RefCell::new(data)), info: vinfo, offs: offs };
 291         Ok(NABufferType::VideoPacked(buf))
 292     }
 293 }
 294
 295 pub fn alloc_audio_buffer(ainfo: NAAudioInfo, nsamples: usize, chmap: NAChannelMap) -> Result<NABufferType, AllocatorError> {
 296     let mut offs: Vec<usize> = Vec::new();
 297     if ainfo.format.is_planar() {
 298         let len = nsamples.checked_mul(ainfo.channels as usize);
 299         if len == None { return Err(AllocatorError::TooLargeDimensions); }
 300         let length = len.unwrap();
 301         for i in 0..ainfo.channels {
 302             offs.push((i as usize) * nsamples);
 303         }
 304         if ainfo.format.is_float() {
 305             if ainfo.format.get_bits() == 32 {
 306                 let mut data: Vec<f32> = Vec::with_capacity(length);
 307                 data.resize(length, 0.0);
 308                 let buf: NAAudioBuffer<f32> = NAAudioBuffer { data: Rc::new(RefCell::new(data)), info: ainfo, offs: offs, chmap: chmap };
 309                 Ok(NABufferType::AudioF32(buf))
 310             } else {
 311                 Err(AllocatorError::TooLargeDimensions)
 312             }
 313         } else {
 314             if ainfo.format.get_bits() == 8 && !ainfo.format.is_signed() {
 315                 let mut data: Vec<u8> = Vec::with_capacity(length);
 316                 data.resize(length, 0);
 317                 let buf: NAAudioBuffer<u8> = NAAudioBuffer { data: Rc::new(RefCell::new(data)), info: ainfo, offs: offs, chmap: chmap };
 318                 Ok(NABufferType::AudioU8(buf))
 319             } else if ainfo.format.get_bits() == 16 && ainfo.format.is_signed() {
 320                 let mut data: Vec<i16> = Vec::with_capacity(length);
 321                 data.resize(length, 0);
 322                 let buf: NAAudioBuffer<i16> = NAAudioBuffer { data: Rc::new(RefCell::new(data)), info: ainfo, offs: offs, chmap: chmap };
 323                 Ok(NABufferType::AudioI16(buf))
 324             } else {
 325                 Err(AllocatorError::TooLargeDimensions)
 326             }
 327         }
 328     } else {
 329         let len = nsamples.checked_mul(ainfo.channels as usize);
 330         if len == None { return Err(AllocatorError::TooLargeDimensions); }
 331         let length = ainfo.format.get_audio_size(len.unwrap() as u64);
 332         let mut data: Vec<u8> = Vec::with_capacity(length);
 333         data.resize(length, 0);
 334         let buf: NAAudioBuffer<u8> = NAAudioBuffer { data: Rc::new(RefCell::new(data)), info: ainfo, offs: offs, chmap: chmap };
 335         Ok(NABufferType::AudioPacked(buf))
 336     }
 337 }
 338
 339 pub fn alloc_data_buffer(size: usize) -> Result<NABufferType, AllocatorError> {
 340     let mut data: Vec<u8> = Vec::with_capacity(size);
 341     data.resize(size, 0);
 342     let buf: NABufferRefT<u8> = Rc::new(RefCell::new(data));
 343     Ok(NABufferType::Data(buf))
 344 }
 345
 346 pub fn copy_buffer(buf: NABufferType) -> NABufferType {
 347     buf.clone()
 348 }
 349
 350 #[allow(dead_code)]
 351 #[derive(Clone)]
 352 pub struct NACodecInfo {
 353     name:       &'static str,
 354     properties: NACodecTypeInfo,
 355     extradata:  Option<Rc<Vec<u8>>>,
 356 }
 357
 358 impl NACodecInfo {
 359     pub fn new(name: &'static str, p: NACodecTypeInfo, edata: Option<Vec<u8>>) -> Self {
 360         let extradata = match edata {
 361             None => None,
 362             Some(vec) => Some(Rc::new(vec)),
 363         };
 364         NACodecInfo { name: name, properties: p, extradata: extradata }
 365     }
 366     pub fn new_ref(name: &'static str, p: NACodecTypeInfo, edata: Option<Rc<Vec<u8>>>) -> Self {
 367         NACodecInfo { name: name, properties: p, extradata: edata }
 368     }
 369     pub fn get_properties(&self) -> NACodecTypeInfo { self.properties }
 370     pub fn get_extradata(&self) -> Option<Rc<Vec<u8>>> {
 371         if let Some(ref vec) = self.extradata { return Some(vec.clone()); }
 372         None
 373     }
 374     pub fn get_name(&self) -> &'static str { self.name }
 375     pub fn is_video(&self) -> bool {
 376         if let NACodecTypeInfo::Video(_) = self.properties { return true; }
 377         false
 378     }
 379     pub fn is_audio(&self) -> bool {
 380         if let NACodecTypeInfo::Audio(_) = self.properties { return true; }
 381         false
 382     }
 383 }
 384
 385 impl fmt::Display for NACodecInfo {
 386     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 387         let edata = match self.extradata.clone() {
 388             None => format!("no extradata"),
 389             Some(v) => format!("{} byte(s) of extradata", v.len()),
 390         };
 391         write!(f, "{}: {} {}", self.name, self.properties, edata)
 392     }
 393 }
 394
 395 pub const DUMMY_CODEC_INFO: NACodecInfo = NACodecInfo {
 396                                 name: "none",
 397                                 properties: NACodecTypeInfo::None,
 398                                 extradata: None };
 399
 400 #[derive(Debug,Clone)]
 401 pub enum NAValue {
 402     None,
 403     Int(i32),
 404     Long(i64),
 405     String(String),
 406     Data(Rc<Vec<u8>>),
 407 }
 408
 409 #[derive(Debug,Clone,Copy,PartialEq)]
 410 #[allow(dead_code)]
 411 pub enum FrameType {
 412     I,
 413     P,
 414     B,
 415     Other,
 416 }
 417
 418 impl fmt::Display for FrameType {
 419     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 420         match *self {
 421             FrameType::I => write!(f, "I"),
 422             FrameType::P => write!(f, "P"),
 423             FrameType::B => write!(f, "B"),
 424             FrameType::Other => write!(f, "x"),
 425         }
 426     }
 427 }
 428
 429 #[derive(Debug,Clone,Copy)]
 430 pub struct NATimeInfo {
 431     pts:            Option<u64>,
 432     dts:            Option<u64>,
 433     duration:       Option<u64>,
 434     tb_num:         u32,
 435     tb_den:         u32,
 436 }
 437
 438 impl NATimeInfo {
 439     pub fn new(pts: Option<u64>, dts: Option<u64>, duration: Option<u64>, tb_num: u32, tb_den: u32) -> Self {
 440         NATimeInfo { pts: pts, dts: dts, duration: duration, tb_num: tb_num, tb_den: tb_den }
 441     }
 442     pub fn get_pts(&self) -> Option<u64> { self.pts }
 443     pub fn get_dts(&self) -> Option<u64> { self.dts }
 444     pub fn get_duration(&self) -> Option<u64> { self.duration }
 445     pub fn set_pts(&mut self, pts: Option<u64>) { self.pts = pts; }
 446     pub fn set_dts(&mut self, dts: Option<u64>) { self.dts = dts; }
 447     pub fn set_duration(&mut self, dur: Option<u64>) { self.duration = dur; }
 448 }
 449
 450 #[allow(dead_code)]
 451 #[derive(Clone)]
 452 pub struct NAFrame {
 453     ts:             NATimeInfo,
 454     buffer:         NABufferType,
 455     info:           Rc<NACodecInfo>,
 456     ftype:          FrameType,
 457     key:            bool,
 458     options:        HashMap<String, NAValue>,
 459 }
 460
 461 pub type NAFrameRef = Rc<RefCell<NAFrame>>;
 462
 463 fn get_plane_size(info: &NAVideoInfo, idx: usize) -> (usize, usize) {
 464     let chromaton = info.get_format().get_chromaton(idx);
 465     if let None = chromaton { return (0, 0); }
 466     let (hs, vs) = chromaton.unwrap().get_subsampling();
 467     let w = (info.get_width()  + ((1 << hs) - 1)) >> hs;
 468     let h = (info.get_height() + ((1 << vs) - 1)) >> vs;
 469     (w, h)
 470 }
 471
 472 impl NAFrame {
 473     pub fn new(ts:             NATimeInfo,
 474                ftype:          FrameType,
 475                keyframe:       bool,
 476                info:           Rc<NACodecInfo>,
 477                options:        HashMap<String, NAValue>,
 478                buffer:         NABufferType) -> Self {
 479         NAFrame { ts: ts, buffer: buffer, info: info, ftype: ftype, key: keyframe, options: options }
 480     }
 481     pub fn get_frame_type(&self) -> FrameType { self.ftype }
 482     pub fn is_keyframe(&self) -> bool { self.key }
 483     pub fn set_frame_type(&mut self, ftype: FrameType) { self.ftype = ftype; }
 484     pub fn set_keyframe(&mut self, key: bool) { self.key = key; }
 485     pub fn get_time_information(&self) -> NATimeInfo { self.ts }
 486     pub fn get_pts(&self) -> Option<u64> { self.ts.get_pts() }
 487     pub fn get_dts(&self) -> Option<u64> { self.ts.get_dts() }
 488     pub fn get_duration(&self) -> Option<u64> { self.ts.get_duration() }
 489     pub fn set_pts(&mut self, pts: Option<u64>) { self.ts.set_pts(pts); }
 490     pub fn set_dts(&mut self, dts: Option<u64>) { self.ts.set_dts(dts); }
 491     pub fn set_duration(&mut self, dur: Option<u64>) { self.ts.set_duration(dur); }
 492
 493     pub fn get_buffer(&self) -> NABufferType { self.buffer.clone() }
 494 }
 495
 496 impl fmt::Display for NAFrame {
 497     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 498         let mut foo = format!("frame type {}", self.ftype);
 499         if let Some(pts) = self.ts.pts { foo = format!("{} pts {}", foo, pts); }
 500         if let Some(dts) = self.ts.dts { foo = format!("{} dts {}", foo, dts); }
 501         if let Some(dur) = self.ts.duration { foo = format!("{} duration {}", foo, dur); }
 502         if self.key { foo = format!("{} kf", foo); }
 503         write!(f, "[{}]", foo)
 504     }
 505 }
 506
 507 /// Possible stream types.
 508 #[derive(Debug,Clone,Copy)]
 509 #[allow(dead_code)]
 510 pub enum StreamType {
 511     /// video stream
 512     Video,
 513     /// audio stream
 514     Audio,
 515     /// subtitles
 516     Subtitles,
 517     /// any data stream (or might be an unrecognized audio/video stream)
 518     Data,
 519     /// nonexistent stream
 520     None,
 521 }
 522
 523 impl fmt::Display for StreamType {
 524     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 525         match *self {
 526             StreamType::Video => write!(f, "Video"),
 527             StreamType::Audio => write!(f, "Audio"),
 528             StreamType::Subtitles => write!(f, "Subtitles"),
 529             StreamType::Data => write!(f, "Data"),
 530             StreamType::None => write!(f, "-"),
 531         }
 532     }
 533 }
 534
 535 #[allow(dead_code)]
 536 #[derive(Clone)]
 537 pub struct NAStream {
 538     media_type:     StreamType,
 539     id:             u32,
 540     num:            usize,
 541     info:           Rc<NACodecInfo>,
 542     tb_num:         u32,
 543     tb_den:         u32,
 544 }
 545
 546 pub fn reduce_timebase(tb_num: u32, tb_den: u32) -> (u32, u32) {
 547     if tb_num == 0 { return (tb_num, tb_den); }
 548     if (tb_den % tb_num) == 0 { return (1, tb_den / tb_num); }
 549
 550     let mut a = tb_num;
 551     let mut b = tb_den;
 552
 553     while a != b {
 554         if a > b { a -= b; }
 555         else if b > a { b -= a; }
 556     }
 557
 558     (tb_num / a, tb_den / a)
 559 }
 560
 561 impl NAStream {
 562     pub fn new(mt: StreamType, id: u32, info: NACodecInfo, tb_num: u32, tb_den: u32) -> Self {
 563         let (n, d) = reduce_timebase(tb_num, tb_den);
 564         NAStream { media_type: mt, id: id, num: 0, info: Rc::new(info), tb_num: n, tb_den: d }
 565     }
 566     pub fn get_id(&self) -> u32 { self.id }
 567     pub fn get_num(&self) -> usize { self.num }
 568     pub fn set_num(&mut self, num: usize) { self.num = num; }
 569     pub fn get_info(&self) -> Rc<NACodecInfo> { self.info.clone() }
 570     pub fn get_timebase(&self) -> (u32, u32) { (self.tb_num, self.tb_den) }
 571     pub fn set_timebase(&mut self, tb_num: u32, tb_den: u32) {
 572         let (n, d) = reduce_timebase(tb_num, tb_den);
 573         self.tb_num = n;
 574         self.tb_den = d;
 575     }
 576 }
 577
 578 impl fmt::Display for NAStream {
 579     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 580         write!(f, "({}#{} @ {}/{} - {})", self.media_type, self.id, self.tb_num, self.tb_den, self.info.get_properties())
 581     }
 582 }
 583
 584 #[allow(dead_code)]
 585 pub struct NAPacket {
 586     stream:         Rc<NAStream>,
 587     ts:             NATimeInfo,
 588     buffer:         Rc<Vec<u8>>,
 589     keyframe:       bool,
 590 //    options:        HashMap<String, NAValue<'a>>,
 591 }
 592
 593 impl NAPacket {
 594     pub fn new(str: Rc<NAStream>, ts: NATimeInfo, kf: bool, vec: Vec<u8>) -> Self {
 595 //        let mut vec: Vec<u8> = Vec::new();
 596 //        vec.resize(size, 0);
 597         NAPacket { stream: str, ts: ts, keyframe: kf, buffer: Rc::new(vec) }
 598     }
 599     pub fn get_stream(&self) -> Rc<NAStream> { self.stream.clone() }
 600     pub fn get_time_information(&self) -> NATimeInfo { self.ts }
 601     pub fn get_pts(&self) -> Option<u64> { self.ts.get_pts() }
 602     pub fn get_dts(&self) -> Option<u64> { self.ts.get_dts() }
 603     pub fn get_duration(&self) -> Option<u64> { self.ts.get_duration() }
 604     pub fn is_keyframe(&self) -> bool { self.keyframe }
 605     pub fn get_buffer(&self) -> Rc<Vec<u8>> { self.buffer.clone() }
 606 }
 607
 608 impl Drop for NAPacket {
 609     fn drop(&mut self) {}
 610 }
 611
 612 impl fmt::Display for NAPacket {
 613     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 614         let mut foo = format!("[pkt for {} size {}", self.stream, self.buffer.len());
 615         if let Some(pts) = self.ts.pts { foo = format!("{} pts {}", foo, pts); }
 616         if let Some(dts) = self.ts.dts { foo = format!("{} dts {}", foo, dts); }
 617         if let Some(dur) = self.ts.duration { foo = format!("{} duration {}", foo, dur); }
 618         if self.keyframe { foo = format!("{} kf", foo); }
 619         foo = foo + "]";
 620         write!(f, "{}", foo)
 621     }
 622 }
 623
 624 pub trait FrameFromPacket {
 625     fn new_from_pkt(pkt: &NAPacket, info: Rc<NACodecInfo>, buf: NABufferType) -> NAFrame;
 626     fn fill_timestamps(&mut self, pkt: &NAPacket);
 627 }
 628
 629 impl FrameFromPacket for NAFrame {
 630     fn new_from_pkt(pkt: &NAPacket, info: Rc<NACodecInfo>, buf: NABufferType) -> NAFrame {
 631         NAFrame::new(pkt.ts, FrameType::Other, pkt.keyframe, info, HashMap::new(), buf)
 632     }
 633     fn fill_timestamps(&mut self, pkt: &NAPacket) {
 634         self.ts = pkt.get_time_information();
 635     }
 636 }
 637