| 1 | use super::*; |
| 2 | use register; |
| 3 | use super::DemuxerError::*; |
| 4 | use io::byteio::*; |
| 5 | use frame::*; |
| 6 | use formats::*; |
| 7 | |
| 8 | macro_rules! mktag { |
| 9 | ($a:expr, $b:expr, $c:expr, $d:expr) => ({ |
| 10 | (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32) |
| 11 | }); |
| 12 | ($arr:expr) => ({ |
| 13 | (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32) |
| 14 | }); |
| 15 | } |
| 16 | |
| 17 | struct StreamState { |
| 18 | strm_no: u8, |
| 19 | got_strf: bool, |
| 20 | strm_type: Option<StreamType>, |
| 21 | } |
| 22 | |
| 23 | impl StreamState { |
| 24 | fn new() -> Self { |
| 25 | StreamState { strm_no: 0, got_strf: true, strm_type: None } |
| 26 | } |
| 27 | fn reset(&mut self) { |
| 28 | self.strm_type = None; |
| 29 | self.got_strf = true; |
| 30 | self.strm_no += 1; |
| 31 | } |
| 32 | fn valid_state(&self) -> bool { |
| 33 | match self.strm_type { |
| 34 | None => self.got_strf, |
| 35 | _ => false, |
| 36 | } |
| 37 | } |
| 38 | } |
| 39 | |
| 40 | #[allow(dead_code)] |
| 41 | struct AVIDemuxer<'a> { |
| 42 | opened: bool, |
| 43 | src: &'a mut ByteReader<'a>, |
| 44 | cur_frame: Vec<u64>, |
| 45 | num_streams: u8, |
| 46 | dmx: Demuxer, |
| 47 | size: usize, |
| 48 | movi_size: usize, |
| 49 | sstate: StreamState, |
| 50 | tb_num: u32, |
| 51 | tb_den: u32, |
| 52 | } |
| 53 | |
| 54 | #[derive(Debug,Clone,Copy,PartialEq)] |
| 55 | enum RIFFTag { |
| 56 | Chunk(u32), |
| 57 | List(u32,u32), |
| 58 | } |
| 59 | |
| 60 | struct RIFFParser { |
| 61 | tag: RIFFTag, |
| 62 | parse: fn(&mut AVIDemuxer, size: usize) -> DemuxerResult<usize>, |
| 63 | } |
| 64 | |
| 65 | impl<'a> Demux<'a> for AVIDemuxer<'a> { |
| 66 | #[allow(unused_variables)] |
| 67 | fn open(&mut self) -> DemuxerResult<()> { |
| 68 | self.read_header()?; |
| 69 | self.opened = true; |
| 70 | Ok(()) |
| 71 | } |
| 72 | |
| 73 | fn get_num_streams(&self) -> usize { self.dmx.get_num_streams() } |
| 74 | fn get_stream(&self, idx: usize) -> Option<Rc<NAStream>> { self.dmx.get_stream(idx) } |
| 75 | |
| 76 | fn get_frame(&mut self) -> DemuxerResult<NAPacket> { |
| 77 | if !self.opened { return Err(NoSuchInput); } |
| 78 | if self.movi_size == 0 { return Err(EOF); } |
| 79 | let mut tag: [u8; 4] = [0; 4]; |
| 80 | loop { |
| 81 | if (self.src.tell() & 1) == 1 { |
| 82 | self.src.read_skip(1)?; |
| 83 | self.movi_size -= 1; |
| 84 | } |
| 85 | self.src.read_buf(&mut tag)?; |
| 86 | let size = self.src.read_u32le()? as usize; |
| 87 | if mktag!(tag) == mktag!(b"JUNK") { |
| 88 | self.movi_size -= size + 8; |
| 89 | self.src.read_skip(size)?; |
| 90 | continue; |
| 91 | } |
| 92 | if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' { |
| 93 | return Err(InvalidData); |
| 94 | } |
| 95 | let stream_no = (tag[0] - b'0') * 10 + (tag[1] - b'0'); |
| 96 | let str = self.dmx.get_stream(stream_no as usize); |
| 97 | if let None = str { return Err(InvalidData); } |
| 98 | let stream = str.unwrap(); |
| 99 | let (tb_num, tb_den) = stream.get_timebase(); |
| 100 | let ts = NATimeInfo::new(Some(self.cur_frame[stream_no as usize]), None, None, tb_num, tb_den); |
| 101 | let pkt = self.src.read_packet(stream, ts, false, size)?; |
| 102 | self.cur_frame[stream_no as usize] += 1; |
| 103 | self.movi_size -= size + 8; |
| 104 | |
| 105 | return Ok(pkt); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | #[allow(unused_variables)] |
| 110 | fn seek(&mut self, time: u64) -> DemuxerResult<()> { |
| 111 | if !self.opened { return Err(NoSuchInput); } |
| 112 | Err(NotImplemented) |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | impl<'a> AVIDemuxer<'a> { |
| 117 | fn new(io: &'a mut ByteReader<'a>) -> Self { |
| 118 | AVIDemuxer { |
| 119 | cur_frame: Vec::new(), |
| 120 | num_streams: 0, |
| 121 | opened: false, |
| 122 | src: io, |
| 123 | size: 0, |
| 124 | movi_size: 0, |
| 125 | sstate: StreamState::new(), |
| 126 | tb_num: 0, |
| 127 | tb_den: 0, |
| 128 | dmx: Demuxer::new() |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | fn parse_chunk(&mut self, end_tag: RIFFTag, csize: usize, depth: u16) -> DemuxerResult<(usize, bool)> { |
| 133 | if csize < 8 { return Err(InvalidData); } |
| 134 | if depth > 42 { return Err(InvalidData); } |
| 135 | |
| 136 | let tag = self.src.read_u32be()?; |
| 137 | let size = self.src.read_u32le()? as usize; |
| 138 | if size > csize { return Err(InvalidData); } |
| 139 | if RIFFTag::Chunk(tag) == end_tag { |
| 140 | return Ok((size, true)); |
| 141 | } |
| 142 | let ltag = if is_list_tag(tag) { self.src.read_u32be()? } else { 0 }; |
| 143 | if RIFFTag::List(tag, ltag) == end_tag { |
| 144 | return Ok((size, true)); |
| 145 | } |
| 146 | |
| 147 | for i in 0..CHUNKS.len() { |
| 148 | if RIFFTag::Chunk(tag) == CHUNKS[i].tag { |
| 149 | let psize = (CHUNKS[i].parse)(self, size)?; |
| 150 | if psize != size { return Err(InvalidData); } |
| 151 | return Ok((size + 8, false)); |
| 152 | } |
| 153 | if RIFFTag::List(tag, ltag) == CHUNKS[i].tag { |
| 154 | let mut rest_size = size - 4; |
| 155 | let psize = (CHUNKS[i].parse)(self, rest_size)?; |
| 156 | if psize > rest_size { return Err(InvalidData); } |
| 157 | rest_size -= psize; |
| 158 | while rest_size > 0 { |
| 159 | let (psize, _) = self.parse_chunk(end_tag, rest_size, depth+1)?; |
| 160 | if psize > rest_size { return Err(InvalidData); } |
| 161 | rest_size -= psize; |
| 162 | } |
| 163 | |
| 164 | return Ok((size + 8, false)); |
| 165 | } |
| 166 | } |
| 167 | self.src.read_skip(size)?; |
| 168 | return Ok((size + 8, false)); |
| 169 | } |
| 170 | |
| 171 | fn read_header(&mut self) -> DemuxerResult<()> { |
| 172 | let riff_tag = self.src.read_u32be()?; |
| 173 | let size = self.src.read_u32le()? as usize; |
| 174 | let avi_tag = self.src.read_u32be()?; |
| 175 | if riff_tag != mktag!(b"RIFF") || avi_tag != mktag!(b"AVI ") { |
| 176 | return Err(InvalidData); |
| 177 | } |
| 178 | self.size = size; |
| 179 | let mut rest_size = size; |
| 180 | loop { |
| 181 | let (csz, end) = self.parse_chunk(RIFFTag::List(mktag!(b"LIST"), mktag!(b"movi")), rest_size,0)?; |
| 182 | if end { self.movi_size = csz - 4; break; } |
| 183 | rest_size -= csz; |
| 184 | } |
| 185 | if !self.sstate.valid_state() || self.sstate.strm_no != self.num_streams { |
| 186 | return Err(InvalidData); |
| 187 | } |
| 188 | Ok(()) |
| 189 | } |
| 190 | |
| 191 | fn read_extradata(&mut self, size: usize) -> DemuxerResult<Option<Vec<u8>>> { |
| 192 | if size == 0 { return Ok(None); } |
| 193 | let mut edvec: Vec<u8> = Vec::with_capacity(size); |
| 194 | edvec.resize(size, 0); |
| 195 | self.src.read_buf(&mut edvec)?; |
| 196 | Ok(Some(edvec)) |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | const CHUNKS: [RIFFParser; 6] = [ |
| 201 | RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"hdrl")), parse: parse_hdrl }, |
| 202 | RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"strl")), parse: parse_strl }, |
| 203 | RIFFParser { tag: RIFFTag::Chunk(mktag!(b"avih")), parse: parse_avih }, |
| 204 | RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strf")), parse: parse_strf }, |
| 205 | RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strh")), parse: parse_strh }, |
| 206 | RIFFParser { tag: RIFFTag::Chunk(mktag!(b"JUNK")), parse: parse_junk }, |
| 207 | ]; |
| 208 | |
| 209 | fn is_list_tag(tag: u32) -> bool { |
| 210 | for i in 0..CHUNKS.len() { |
| 211 | if let RIFFTag::List(ltag, _) = CHUNKS[i].tag { |
| 212 | if tag == ltag { |
| 213 | return true; |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | false |
| 218 | } |
| 219 | |
| 220 | #[allow(unused_variables)] |
| 221 | fn parse_hdrl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 222 | Ok(0) |
| 223 | } |
| 224 | |
| 225 | #[allow(unused_variables)] |
| 226 | fn parse_strl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 227 | Ok(0) |
| 228 | } |
| 229 | |
| 230 | #[allow(unused_variables)] |
| 231 | fn parse_strh(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 232 | if size < 0x38 { return Err(InvalidData); } |
| 233 | let tag = dmx.src.read_u32be()?; //stream type |
| 234 | let fcc = dmx.src.read_u32be()?; //handler(fourcc) |
| 235 | dmx.src.read_u32le()?; //flags |
| 236 | dmx.src.read_skip(2)?; //priority |
| 237 | dmx.src.read_skip(2)?; //language |
| 238 | dmx.src.read_skip(4)?; //initial frames |
| 239 | dmx.tb_num = dmx.src.read_u32le()?; //scale |
| 240 | dmx.tb_den = dmx.src.read_u32le()?; //rate |
| 241 | dmx.src.read_skip(4)?; //start |
| 242 | dmx.src.read_skip(4)?; //length |
| 243 | dmx.src.read_skip(4)?; //buf size |
| 244 | dmx.src.read_skip(4)?; //quality |
| 245 | dmx.src.read_skip(4)?; //sample size |
| 246 | let a = dmx.src.read_u16le()?; |
| 247 | let b = dmx.src.read_u16le()?; |
| 248 | let c = dmx.src.read_u16le()?; |
| 249 | let d = dmx.src.read_u16le()?; |
| 250 | |
| 251 | dmx.src.read_skip(size - 0x38)?; |
| 252 | |
| 253 | if !dmx.sstate.valid_state() || dmx.sstate.strm_no >= dmx.num_streams { |
| 254 | return Err(InvalidData); |
| 255 | } |
| 256 | if tag == mktag!(b"vids") { |
| 257 | dmx.sstate.strm_type = Some(StreamType::Video); |
| 258 | } else if tag == mktag!(b"auds") { |
| 259 | dmx.sstate.strm_type = Some(StreamType::Audio); |
| 260 | } else { |
| 261 | dmx.sstate.strm_type = Some(StreamType::Data); |
| 262 | } |
| 263 | dmx.sstate.got_strf = false; |
| 264 | |
| 265 | Ok(size) |
| 266 | } |
| 267 | |
| 268 | fn parse_strf(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 269 | if let None = dmx.sstate.strm_type { return Err(InvalidData); } |
| 270 | match dmx.sstate.strm_type.unwrap() { |
| 271 | StreamType::Video => parse_strf_vids(dmx, size), |
| 272 | StreamType::Audio => parse_strf_auds(dmx, size), |
| 273 | _ => parse_strf_xxxx(dmx, size), |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | #[allow(unused_variables)] |
| 278 | fn parse_strf_vids(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 279 | if size < 40 { return Err(InvalidData); } |
| 280 | let bi_size = dmx.src.read_u32le()?; |
| 281 | if (bi_size as usize) > size { return Err(InvalidData); } |
| 282 | let width = dmx.src.read_u32le()?; |
| 283 | let height = dmx.src.read_u32le()? as i32; |
| 284 | let planes = dmx.src.read_u16le()?; |
| 285 | let bitcount = dmx.src.read_u16le()?; |
| 286 | let mut compression: [u8; 4] = [0; 4]; |
| 287 | dmx.src.read_buf(&mut compression)?; |
| 288 | let img_size = dmx.src.read_u32le()?; |
| 289 | let xdpi = dmx.src.read_u32le()?; |
| 290 | let ydpi = dmx.src.read_u32le()?; |
| 291 | let colors = dmx.src.read_u32le()?; |
| 292 | let imp_colors = dmx.src.read_u32le()?; |
| 293 | |
| 294 | let flip = height < 0; |
| 295 | let format = if bitcount > 8 { RGB24_FORMAT } else { PAL8_FORMAT }; |
| 296 | let vhdr = NAVideoInfo::new(width as usize, if flip { -height as usize } else { height as usize}, flip, PAL8_FORMAT); |
| 297 | let vci = NACodecTypeInfo::Video(vhdr); |
| 298 | let edata = dmx.read_extradata(size - 40)?; |
| 299 | let cname = match register::find_codec_from_avi_fourcc(&compression) { |
| 300 | None => "unknown", |
| 301 | Some(name) => name, |
| 302 | }; |
| 303 | let vinfo = NACodecInfo::new(cname, vci, edata); |
| 304 | let res = dmx.dmx.add_stream(NAStream::new(StreamType::Video, dmx.sstate.strm_no as u32, vinfo, dmx.tb_num, dmx.tb_den)); |
| 305 | if let None = res { return Err(MemoryError); } |
| 306 | dmx.sstate.reset(); |
| 307 | Ok(size) |
| 308 | } |
| 309 | |
| 310 | #[allow(unused_variables)] |
| 311 | fn parse_strf_auds(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 312 | if size < 16 { return Err(InvalidData); } |
| 313 | let w_format_tag = dmx.src.read_u16le()?; |
| 314 | let channels = dmx.src.read_u16le()?; |
| 315 | let samplespersec = dmx.src.read_u32le()?; |
| 316 | let avgbytespersec = dmx.src.read_u32le()?; |
| 317 | let block_align = dmx.src.read_u16le()?; |
| 318 | let bits_per_sample = dmx.src.read_u16le()?; |
| 319 | |
| 320 | let soniton = NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED); |
| 321 | let ahdr = NAAudioInfo::new(samplespersec, channels as u8, soniton, block_align as usize); |
| 322 | let edata = dmx.read_extradata(size - 16)?; |
| 323 | let cname = match register::find_codec_from_wav_twocc(w_format_tag) { |
| 324 | None => "unknown", |
| 325 | Some(name) => name, |
| 326 | }; |
| 327 | let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata); |
| 328 | let res = dmx.dmx.add_stream(NAStream::new(StreamType::Audio, dmx.sstate.strm_no as u32, ainfo, dmx.tb_num, dmx.tb_den)); |
| 329 | if let None = res { return Err(MemoryError); } |
| 330 | dmx.sstate.reset(); |
| 331 | Ok(size) |
| 332 | } |
| 333 | |
| 334 | fn parse_strf_xxxx(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 335 | let edata = dmx.read_extradata(size)?; |
| 336 | let info = NACodecInfo::new("unknown", NACodecTypeInfo::None, edata); |
| 337 | let res = dmx.dmx.add_stream(NAStream::new(StreamType::Data, dmx.sstate.strm_no as u32, info, dmx.tb_num, dmx.tb_den)); |
| 338 | if let None = res { return Err(MemoryError); } |
| 339 | dmx.sstate.reset(); |
| 340 | Ok(size) |
| 341 | } |
| 342 | |
| 343 | #[allow(unused_variables)] |
| 344 | fn parse_avih(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 345 | if size < 0x38 { return Err(InvalidData); } |
| 346 | let timebase = dmx.src.read_u32le()?; //microsec per frame |
| 347 | dmx.src.read_skip(4)?; //max frame size |
| 348 | dmx.src.read_skip(4)?; //padding |
| 349 | dmx.src.read_u32le()?; //flags |
| 350 | let frames = dmx.src.read_u32le()?; //frames |
| 351 | dmx.src.read_skip(4)?; //initial frames |
| 352 | let streams = dmx.src.read_u32le()?; //streams |
| 353 | if streams > 100 { return Err(InvalidData); } |
| 354 | dmx.num_streams = streams as u8; |
| 355 | |
| 356 | dmx.src.read_skip(4)?; //buf size |
| 357 | let width = dmx.src.read_u32le()?; //width |
| 358 | let height = dmx.src.read_u32le()? as i32; //height |
| 359 | dmx.src.read_skip(16)?; //reserved |
| 360 | |
| 361 | dmx.cur_frame.resize(streams as usize, 0); |
| 362 | dmx.src.read_skip(size - 0x38)?; |
| 363 | Ok(size) |
| 364 | } |
| 365 | |
| 366 | fn parse_junk(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> { |
| 367 | dmx.src.read_skip(size)?; |
| 368 | Ok(size) |
| 369 | } |
| 370 | |
| 371 | pub struct AVIDemuxerCreator { } |
| 372 | |
| 373 | impl DemuxerCreator for AVIDemuxerCreator { |
| 374 | fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a> { |
| 375 | Box::new(AVIDemuxer::new(br)) |
| 376 | } |
| 377 | fn get_name(&self) -> &'static str { "avi" } |
| 378 | } |
| 379 | |
| 380 | #[cfg(test)] |
| 381 | mod test { |
| 382 | use super::*; |
| 383 | use std::fs::File; |
| 384 | |
| 385 | #[test] |
| 386 | fn test_avi_demux() { |
| 387 | let mut file = File::open("assets/laser05.avi").unwrap(); |
| 388 | let mut fr = FileReader::new_read(&mut file); |
| 389 | let mut br = ByteReader::new(&mut fr); |
| 390 | let mut dmx = AVIDemuxer::new(&mut br); |
| 391 | dmx.open().unwrap(); |
| 392 | |
| 393 | loop { |
| 394 | let pktres = dmx.get_frame(); |
| 395 | if let Err(e) = pktres { |
| 396 | if e == DemuxerError::EOF { break; } |
| 397 | panic!("error"); |
| 398 | } |
| 399 | let pkt = pktres.unwrap(); |
| 400 | println!("Got {}", pkt); |
| 401 | } |
| 402 | } |
| 403 | } |