3 use super::DemuxerError::*;
9 ($a:expr, $b:expr, $c:expr, $d:expr) => ({
10 (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32)
13 (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32)
20 strm_type: Option<StreamType>,
25 StreamState { strm_no: 0, got_strf: true, strm_type: None }
28 self.strm_type = None;
32 fn valid_state(&self) -> bool {
33 match self.strm_type {
34 None => self.got_strf,
41 struct AVIDemuxer<'a> {
43 src: &'a mut ByteReader<'a>,
54 #[derive(Debug,Clone,Copy,PartialEq)]
62 parse: fn(&mut AVIDemuxer, size: usize) -> DemuxerResult<usize>,
65 impl<'a> Demux<'a> for AVIDemuxer<'a> {
66 #[allow(unused_variables)]
67 fn open(&mut self) -> DemuxerResult<()> {
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) }
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];
81 if (self.src.tell() & 1) == 1 {
82 self.src.read_skip(1)?;
84 if self.movi_size == 0 { return Err(EOF); }
86 self.src.read_buf(&mut tag)?;
87 let size = self.src.read_u32le()? as usize;
88 if mktag!(tag) == mktag!(b"JUNK") {
89 self.movi_size -= size + 8;
90 self.src.read_skip(size)?;
93 if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
94 return Err(InvalidData);
96 let stream_no = (tag[0] - b'0') * 10 + (tag[1] - b'0');
97 let str = self.dmx.get_stream(stream_no as usize);
98 if let None = str { return Err(InvalidData); }
99 let stream = str.unwrap();
100 let (tb_num, tb_den) = stream.get_timebase();
101 let ts = NATimeInfo::new(Some(self.cur_frame[stream_no as usize]), None, None, tb_num, tb_den);
102 let pkt = self.src.read_packet(stream, ts, false, size)?;
103 self.cur_frame[stream_no as usize] += 1;
104 self.movi_size -= size + 8;
110 #[allow(unused_variables)]
111 fn seek(&mut self, time: u64) -> DemuxerResult<()> {
112 if !self.opened { return Err(NoSuchInput); }
117 impl<'a> AVIDemuxer<'a> {
118 fn new(io: &'a mut ByteReader<'a>) -> Self {
120 cur_frame: Vec::new(),
126 sstate: StreamState::new(),
133 fn parse_chunk(&mut self, end_tag: RIFFTag, csize: usize, depth: u16) -> DemuxerResult<(usize, bool)> {
134 if csize < 8 { return Err(InvalidData); }
135 if depth > 42 { return Err(InvalidData); }
137 let tag = self.src.read_u32be()?;
138 let size = self.src.read_u32le()? as usize;
139 if size > csize { return Err(InvalidData); }
140 if RIFFTag::Chunk(tag) == end_tag {
141 return Ok((size, true));
143 let is_list = is_list_tag(tag);
144 let ltag = if is_list { self.src.read_u32be()? } else { 0 };
145 if RIFFTag::List(tag, ltag) == end_tag {
146 return Ok((size, true));
149 for i in 0..CHUNKS.len() {
150 if RIFFTag::Chunk(tag) == CHUNKS[i].tag {
151 let psize = (CHUNKS[i].parse)(self, size)?;
152 if psize != size { return Err(InvalidData); }
153 if (psize & 1) == 1 { self.src.read_skip(1)?; }
154 return Ok((size + 8, false));
156 if RIFFTag::List(tag, ltag) == CHUNKS[i].tag {
157 let mut rest_size = size - 4;
158 let psize = (CHUNKS[i].parse)(self, rest_size)?;
159 if psize > rest_size { return Err(InvalidData); }
161 while rest_size > 0 {
162 let (psize, _) = self.parse_chunk(end_tag, rest_size, depth+1)?;
163 if psize > rest_size { return Err(InvalidData); }
165 if (psize & 1) == 1 {
172 return Ok((size + 8, false));
176 self.src.read_skip(size)?;
178 if size < 4 { return Err(InvalidData); }
179 self.src.read_skip(size - 4)?;
181 if (size & 1) == 1 { self.src.read_skip(1)?; }
182 return Ok((size + 8, false));
185 fn read_header(&mut self) -> DemuxerResult<()> {
186 let riff_tag = self.src.read_u32be()?;
187 let size = self.src.read_u32le()? as usize;
188 let avi_tag = self.src.read_u32be()?;
189 if riff_tag != mktag!(b"RIFF") || avi_tag != mktag!(b"AVI ") {
190 return Err(InvalidData);
193 let mut rest_size = size;
195 let (csz, end) = self.parse_chunk(RIFFTag::List(mktag!(b"LIST"), mktag!(b"movi")), rest_size,0)?;
196 if end { self.movi_size = csz - 4; break; }
199 if !self.sstate.valid_state() || self.sstate.strm_no != self.num_streams {
200 return Err(InvalidData);
205 fn read_extradata(&mut self, size: usize) -> DemuxerResult<Option<Vec<u8>>> {
206 if size == 0 { return Ok(None); }
207 let mut edvec: Vec<u8> = Vec::with_capacity(size);
208 edvec.resize(size, 0);
209 self.src.read_buf(&mut edvec)?;
214 const CHUNKS: [RIFFParser; 6] = [
215 RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"hdrl")), parse: parse_hdrl },
216 RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"strl")), parse: parse_strl },
217 RIFFParser { tag: RIFFTag::Chunk(mktag!(b"avih")), parse: parse_avih },
218 RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strf")), parse: parse_strf },
219 RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strh")), parse: parse_strh },
220 RIFFParser { tag: RIFFTag::Chunk(mktag!(b"JUNK")), parse: parse_junk },
223 fn is_list_tag(tag: u32) -> bool {
224 for i in 0..CHUNKS.len() {
225 if let RIFFTag::List(ltag, _) = CHUNKS[i].tag {
234 #[allow(unused_variables)]
235 fn parse_hdrl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
239 #[allow(unused_variables)]
240 fn parse_strl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
244 #[allow(unused_variables)]
245 fn parse_strh(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
246 if size < 0x38 { return Err(InvalidData); }
247 let tag = dmx.src.read_u32be()?; //stream type
248 let fcc = dmx.src.read_u32be()?; //handler(fourcc)
249 dmx.src.read_u32le()?; //flags
250 dmx.src.read_skip(2)?; //priority
251 dmx.src.read_skip(2)?; //language
252 dmx.src.read_skip(4)?; //initial frames
253 dmx.tb_num = dmx.src.read_u32le()?; //scale
254 dmx.tb_den = dmx.src.read_u32le()?; //rate
255 dmx.src.read_skip(4)?; //start
256 dmx.src.read_skip(4)?; //length
257 dmx.src.read_skip(4)?; //buf size
258 dmx.src.read_skip(4)?; //quality
259 dmx.src.read_skip(4)?; //sample size
260 let a = dmx.src.read_u16le()?;
261 let b = dmx.src.read_u16le()?;
262 let c = dmx.src.read_u16le()?;
263 let d = dmx.src.read_u16le()?;
265 dmx.src.read_skip(size - 0x38)?;
267 if !dmx.sstate.valid_state() || dmx.sstate.strm_no >= dmx.num_streams {
268 return Err(InvalidData);
270 if tag == mktag!(b"vids") {
271 dmx.sstate.strm_type = Some(StreamType::Video);
272 } else if tag == mktag!(b"auds") {
273 dmx.sstate.strm_type = Some(StreamType::Audio);
275 dmx.sstate.strm_type = Some(StreamType::Data);
277 dmx.sstate.got_strf = false;
282 fn parse_strf(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
283 if let None = dmx.sstate.strm_type { return Err(InvalidData); }
284 match dmx.sstate.strm_type.unwrap() {
285 StreamType::Video => parse_strf_vids(dmx, size),
286 StreamType::Audio => parse_strf_auds(dmx, size),
287 _ => parse_strf_xxxx(dmx, size),
291 #[allow(unused_variables)]
292 fn parse_strf_vids(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
293 if size < 40 { return Err(InvalidData); }
294 let bi_size = dmx.src.read_u32le()?;
295 if (bi_size as usize) > size { return Err(InvalidData); }
296 let width = dmx.src.read_u32le()?;
297 let height = dmx.src.read_u32le()? as i32;
298 let planes = dmx.src.read_u16le()?;
299 let bitcount = dmx.src.read_u16le()?;
300 let mut compression: [u8; 4] = [0; 4];
301 dmx.src.read_buf(&mut compression)?;
302 let img_size = dmx.src.read_u32le()?;
303 let xdpi = dmx.src.read_u32le()?;
304 let ydpi = dmx.src.read_u32le()?;
305 let colors = dmx.src.read_u32le()?;
306 let imp_colors = dmx.src.read_u32le()?;
308 let flip = height < 0;
309 let format = if bitcount > 8 { RGB24_FORMAT } else { PAL8_FORMAT };
310 let vhdr = NAVideoInfo::new(width as usize, if flip { -height as usize } else { height as usize}, flip, PAL8_FORMAT);
311 let vci = NACodecTypeInfo::Video(vhdr);
312 let edata = dmx.read_extradata(size - 40)?;
313 let cname = match register::find_codec_from_avi_fourcc(&compression) {
317 let vinfo = NACodecInfo::new(cname, vci, edata);
318 let res = dmx.dmx.add_stream(NAStream::new(StreamType::Video, dmx.sstate.strm_no as u32, vinfo, dmx.tb_num, dmx.tb_den));
319 if let None = res { return Err(MemoryError); }
324 #[allow(unused_variables)]
325 fn parse_strf_auds(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
326 if size < 16 { return Err(InvalidData); }
327 let w_format_tag = dmx.src.read_u16le()?;
328 let channels = dmx.src.read_u16le()?;
329 let samplespersec = dmx.src.read_u32le()?;
330 let avgbytespersec = dmx.src.read_u32le()?;
331 let block_align = dmx.src.read_u16le()?;
332 let bits_per_sample = dmx.src.read_u16le()? * 8;
334 let soniton = NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED);
335 let ahdr = NAAudioInfo::new(samplespersec, channels as u8, soniton, block_align as usize);
336 let edata = dmx.read_extradata(size - 16)?;
337 let cname = match register::find_codec_from_wav_twocc(w_format_tag) {
341 let ainfo = NACodecInfo::new(cname, NACodecTypeInfo::Audio(ahdr), edata);
342 let res = dmx.dmx.add_stream(NAStream::new(StreamType::Audio, dmx.sstate.strm_no as u32, ainfo, dmx.tb_num, dmx.tb_den));
343 if let None = res { return Err(MemoryError); }
348 fn parse_strf_xxxx(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
349 let edata = dmx.read_extradata(size)?;
350 let info = NACodecInfo::new("unknown", NACodecTypeInfo::None, edata);
351 let res = dmx.dmx.add_stream(NAStream::new(StreamType::Data, dmx.sstate.strm_no as u32, info, dmx.tb_num, dmx.tb_den));
352 if let None = res { return Err(MemoryError); }
357 #[allow(unused_variables)]
358 fn parse_avih(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
359 if size < 0x38 { return Err(InvalidData); }
360 let timebase = dmx.src.read_u32le()?; //microsec per frame
361 dmx.src.read_skip(4)?; //max frame size
362 dmx.src.read_skip(4)?; //padding
363 dmx.src.read_u32le()?; //flags
364 let frames = dmx.src.read_u32le()?; //frames
365 dmx.src.read_skip(4)?; //initial frames
366 let streams = dmx.src.read_u32le()?; //streams
367 if streams > 100 { return Err(InvalidData); }
368 dmx.num_streams = streams as u8;
370 dmx.src.read_skip(4)?; //buf size
371 let width = dmx.src.read_u32le()?; //width
372 let height = dmx.src.read_u32le()? as i32; //height
373 dmx.src.read_skip(16)?; //reserved
375 dmx.cur_frame.resize(streams as usize, 0);
376 dmx.src.read_skip(size - 0x38)?;
380 fn parse_junk(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
381 dmx.src.read_skip(size)?;
385 pub struct AVIDemuxerCreator { }
387 impl DemuxerCreator for AVIDemuxerCreator {
388 fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<Demux<'a> + 'a> {
389 Box::new(AVIDemuxer::new(br))
391 fn get_name(&self) -> &'static str { "avi" }
400 fn test_avi_demux() {
401 let mut file = File::open("assets/laser05.avi").unwrap();
402 let mut fr = FileReader::new_read(&mut file);
403 let mut br = ByteReader::new(&mut fr);
404 let mut dmx = AVIDemuxer::new(&mut br);
408 let pktres = dmx.get_frame();
409 if let Err(e) = pktres {
410 if e == DemuxerError::EOF { break; }
413 let pkt = pktres.unwrap();
414 println!("Got {}", pkt);