--- /dev/null
+use super::*;
+use super::DemuxerError::*;
+use io::byteio::*;
+use frame::*;
+use formats::*;
+
+macro_rules! mktag {
+ ($a:expr, $b:expr, $c:expr, $d:expr) => ({
+ (($a as u32) << 24) | (($b as u32) << 16) | (($c as u32) << 8) | ($d as u32)
+ });
+ ($arr:expr) => ({
+ (($arr[0] as u32) << 24) | (($arr[1] as u32) << 16) | (($arr[2] as u32) << 8) | ($arr[3] as u32)
+ });
+}
+
+struct StreamState {
+ strm_no: u8,
+ got_strf: bool,
+ strm_type: Option<StreamType>,
+}
+
+impl StreamState {
+ fn new() -> Self {
+ StreamState { strm_no: 0, got_strf: true, strm_type: None }
+ }
+ fn reset(&mut self) {
+ self.strm_type = None;
+ self.got_strf = true;
+ self.strm_no += 1;
+ }
+ fn valid_state(&self) -> bool {
+ match self.strm_type {
+ None => self.got_strf,
+ _ => false,
+ }
+ }
+}
+
+#[allow(dead_code)]
+pub struct AVIDemuxer<'a> {
+ opened: bool,
+ src: &'a mut ByteReader<'a>,
+ cur_frame: Vec<u64>,
+ num_streams: u8,
+ dmx: Demuxer,
+ size: usize,
+ movi_size: usize,
+ sstate: StreamState,
+}
+
+#[derive(Debug,Clone,Copy)]
+enum RIFFTag {
+ Chunk(u32),
+ List(u32,u32),
+}
+
+struct RIFFParser {
+ tag: RIFFTag,
+ parse: fn(&mut AVIDemuxer, size: usize) -> DemuxerResult<usize>,
+}
+
+impl<'a> Demux<'a> for AVIDemuxer<'a> {
+ #[allow(unused_variables)]
+ fn open(&mut self) -> DemuxerResult<()> {
+ self.read_header()?;
+ self.opened = true;
+ Ok(())
+ }
+
+ fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
+ if !self.opened { return Err(NoSuchInput); }
+ if self.movi_size == 0 { return Err(EOF); }
+ let mut tag: [u8; 4] = [0; 4];
+ loop {
+ self.src.read_buf(&mut tag)?;
+ let size = self.src.read_u32le()? as usize;
+ if mktag!(tag) == mktag!(b"JUNK") {
+ self.movi_size -= size + 8;
+ self.src.read_skip(size)?;
+ continue;
+ }
+ if tag[0] < b'0' || tag[0] > b'9' || tag[1] < b'0' || tag[1] > b'9' {
+ return Err(InvalidData);
+ }
+ let stream_no = (tag[0] - b'0') * 10 + (tag[1] - b'0');
+ let str = self.dmx.get_stream(stream_no as usize);
+ if let None = str { return Err(InvalidData); }
+ let stream = str.unwrap();
+ let pkt = self.src.read_packet(stream, Some(self.cur_frame[stream_no as usize]), None, None, false, size)?;
+ self.cur_frame[stream_no as usize] += 1;
+ self.movi_size -= size + 8;
+
+ return Ok(pkt);
+ }
+ }
+
+ #[allow(unused_variables)]
+ fn seek(&mut self, time: u64) -> DemuxerResult<()> {
+ if !self.opened { return Err(NoSuchInput); }
+ Err(NotImplemented)
+ }
+}
+
+impl<'a> AVIDemuxer<'a> {
+ pub fn new(io: &'a mut ByteReader<'a>) -> Self {
+ AVIDemuxer {
+ cur_frame: Vec::new(),
+ num_streams: 0,
+ opened: false,
+ src: io,
+ size: 0,
+ movi_size: 0,
+ sstate: StreamState::new(),
+ dmx: Demuxer::new()
+ }
+ }
+
+ fn parse_chunk(&mut self, end_tag: RIFFTag, csize: usize, depth: u16) -> DemuxerResult<(usize, bool)> {
+ if csize < 8 { return Err(InvalidData); }
+ if depth > 42 { return Err(InvalidData); }
+
+ let tag = self.src.read_u32be()?;
+ let size = self.src.read_u32le()? as usize;
+ if size > csize { return Err(InvalidData); }
+ if let RIFFTag::Chunk(etag) = end_tag {
+ if etag == tag { return Ok((size, true)); }
+ }
+ let ltag = if is_list_tag(tag) { self.src.read_u32be()? } else { 0 };
+ if let RIFFTag::List(etag1, etag2) = end_tag {
+ if etag1 == tag && etag2 == ltag {
+ return Ok((size, true));
+ }
+ }
+
+ for i in 0..CHUNKS.len() {
+ if let RIFFTag::Chunk(ctag) = CHUNKS[i].tag {
+ if ctag == tag {
+ let psize = (CHUNKS[i].parse)(self, size)?;
+ if psize != size { return Err(InvalidData); }
+ return Ok((size + 8, false));
+ }
+ }
+ if let RIFFTag::List(ctag, clst) = CHUNKS[i].tag {
+ if ctag == tag && clst == ltag {
+ let mut rest_size = size - 4;
+ let psize = (CHUNKS[i].parse)(self, rest_size)?;
+ if psize > rest_size { return Err(InvalidData); }
+ rest_size -= psize;
+ while rest_size > 0 {
+ let (psize, _) = self.parse_chunk(end_tag, rest_size, depth+1)?;
+ if psize > rest_size { return Err(InvalidData); }
+ rest_size -= psize;
+ }
+
+ return Ok((size + 8, false));
+ }
+ }
+ }
+ self.src.read_skip(size)?;
+ return Ok((size + 8, false));
+ }
+
+ fn read_header(&mut self) -> DemuxerResult<()> {
+ let riff_tag = self.src.read_u32be()?;
+ let size = self.src.read_u32le()? as usize;
+ let avi_tag = self.src.read_u32be()?;
+ if riff_tag != mktag!(b"RIFF") || avi_tag != mktag!(b"AVI ") {
+ return Err(InvalidData);
+ }
+ self.size = size;
+ let mut rest_size = size;
+ loop {
+ let (csz, end) = self.parse_chunk(RIFFTag::List(mktag!(b"LIST"), mktag!(b"movi")), rest_size,0)?;
+ if end { self.movi_size = csz - 4; break; }
+ rest_size -= csz;
+ }
+ if !self.sstate.valid_state() || self.sstate.strm_no != self.num_streams {
+ return Err(InvalidData);
+ }
+ Ok(())
+ }
+
+ fn read_extradata(&mut self, size: usize) -> DemuxerResult<Option<Vec<u8>>> {
+ if size == 0 { return Ok(None); }
+ let mut edvec: Vec<u8> = Vec::with_capacity(size);
+ edvec.resize(size, 0);
+ self.src.read_buf(&mut edvec)?;
+ Ok(Some(edvec))
+ }
+}
+
+const CHUNKS: [RIFFParser; 6] = [
+ RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"hdrl")), parse: parse_hdrl },
+ RIFFParser { tag: RIFFTag::List(mktag!(b"LIST"), mktag!(b"strl")), parse: parse_strl },
+ RIFFParser { tag: RIFFTag::Chunk(mktag!(b"avih")), parse: parse_avih },
+ RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strf")), parse: parse_strf },
+ RIFFParser { tag: RIFFTag::Chunk(mktag!(b"strh")), parse: parse_strh },
+ RIFFParser { tag: RIFFTag::Chunk(mktag!(b"JUNK")), parse: parse_junk },
+];
+
+fn is_list_tag(tag: u32) -> bool {
+ for i in 0..CHUNKS.len() {
+ if let RIFFTag::List(ltag, _) = CHUNKS[i].tag {
+ if tag == ltag {
+ return true;
+ }
+ }
+ }
+ false
+}
+
+#[allow(unused_variables)]
+fn parse_hdrl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ Ok(0)
+}
+
+#[allow(unused_variables)]
+fn parse_strl(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ Ok(0)
+}
+
+#[allow(unused_variables)]
+fn parse_strh(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ if size < 0x38 { return Err(InvalidData); }
+ let tag = dmx.src.read_u32be()?; //stream type
+ let fcc = dmx.src.read_u32be()?; //handler(fourcc)
+ dmx.src.read_u32le()?; //flags
+ dmx.src.read_skip(2)?; //priority
+ dmx.src.read_skip(2)?; //language
+ dmx.src.read_skip(4)?; //initial frames
+ let scale = dmx.src.read_u32le()?; //scale
+ let rate = dmx.src.read_u32le()?; //rate
+ dmx.src.read_skip(4)?; //start
+ dmx.src.read_skip(4)?; //length
+ dmx.src.read_skip(4)?; //buf size
+ dmx.src.read_skip(4)?; //quality
+ dmx.src.read_skip(4)?; //sample size
+ let a = dmx.src.read_u16le()?;
+ let b = dmx.src.read_u16le()?;
+ let c = dmx.src.read_u16le()?;
+ let d = dmx.src.read_u16le()?;
+
+ dmx.src.read_skip(size - 0x38)?;
+
+ if !dmx.sstate.valid_state() || dmx.sstate.strm_no >= dmx.num_streams {
+ return Err(InvalidData);
+ }
+ if tag == mktag!(b"vids") {
+ dmx.sstate.strm_type = Some(StreamType::Video);
+ } else if tag == mktag!(b"auds") {
+ dmx.sstate.strm_type = Some(StreamType::Audio);
+ } else {
+ dmx.sstate.strm_type = Some(StreamType::Data);
+ }
+ dmx.sstate.got_strf = false;
+
+ Ok(size)
+}
+
+fn parse_strf(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ if let None = dmx.sstate.strm_type { return Err(InvalidData); }
+ match dmx.sstate.strm_type.unwrap() {
+ StreamType::Video => parse_strf_vids(dmx, size),
+ StreamType::Audio => parse_strf_auds(dmx, size),
+ _ => parse_strf_xxxx(dmx, size),
+ }
+}
+
+#[allow(unused_variables)]
+fn parse_strf_vids(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ if size < 40 { return Err(InvalidData); }
+ let bi_size = dmx.src.read_u32le()?;
+ if (bi_size as usize) > size { return Err(InvalidData); }
+ let width = dmx.src.read_u32le()?;
+ let height = dmx.src.read_u32le()? as i32;
+ let planes = dmx.src.read_u16le()?;
+ let bitcount = dmx.src.read_u16le()?;
+ let compression = dmx.src.read_u32be()?;
+ let img_size = dmx.src.read_u32le()?;
+ let xdpi = dmx.src.read_u32le()?;
+ let ydpi = dmx.src.read_u32le()?;
+ let colors = dmx.src.read_u32le()?;
+ let imp_colors = dmx.src.read_u32le()?;
+
+ let flip = height < 0;
+ let format = if bitcount > 8 { RGB24_FORMAT } else { PAL8_FORMAT };
+ let vhdr = NAVideoInfo::new(width, if flip { -height as u32 } else { height as u32}, flip, PAL8_FORMAT);
+ let vci = NACodecTypeInfo::Video(vhdr);
+ let edata = dmx.read_extradata(size - 40)?;
+ let vinfo = NACodecInfo::new(vci, edata);
+ let res = dmx.dmx.add_stream(NAStream::new(StreamType::Video, dmx.sstate.strm_no as u32, vinfo));
+ if let None = res { return Err(MemoryError); }
+ dmx.sstate.reset();
+ Ok(size)
+}
+
+#[allow(unused_variables)]
+fn parse_strf_auds(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ if size < 16 { return Err(InvalidData); }
+ let w_format_tag = dmx.src.read_u16le()?;
+ let channels = dmx.src.read_u16le()?;
+ let samplespersec = dmx.src.read_u32le()?;
+ let avgbytespersec = dmx.src.read_u32le()?;
+ let block_align = dmx.src.read_u16le()?;
+ let bits_per_sample = dmx.src.read_u16le()?;
+
+ let soniton = NASoniton::new(bits_per_sample as u8, SONITON_FLAG_SIGNED);
+ let ahdr = NAAudioInfo::new(samplespersec, channels as u8, soniton, block_align as usize);
+ let edata = dmx.read_extradata(size - 16)?;
+ let ainfo = NACodecInfo::new(NACodecTypeInfo::Audio(ahdr), edata);
+ let res = dmx.dmx.add_stream(NAStream::new(StreamType::Audio, dmx.sstate.strm_no as u32, ainfo));
+ if let None = res { return Err(MemoryError); }
+ dmx.sstate.reset();
+ Ok(size)
+}
+
+fn parse_strf_xxxx(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ let edata = dmx.read_extradata(size)?;
+ let info = NACodecInfo::new(NACodecTypeInfo::None, edata);
+ let res = dmx.dmx.add_stream(NAStream::new(StreamType::Data, dmx.sstate.strm_no as u32, info));
+ if let None = res { return Err(MemoryError); }
+ dmx.sstate.reset();
+ Ok(size)
+}
+
+#[allow(unused_variables)]
+fn parse_avih(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ if size < 0x38 { return Err(InvalidData); }
+ let timebase = dmx.src.read_u32le()?; //microsec per frame
+ dmx.src.read_skip(4)?; //max frame size
+ dmx.src.read_skip(4)?; //padding
+ dmx.src.read_u32le()?; //flags
+ let frames = dmx.src.read_u32le()?; //frames
+ dmx.src.read_skip(4)?; //initial frames
+ let streams = dmx.src.read_u32le()?; //streams
+ if streams > 100 { return Err(InvalidData); }
+ dmx.num_streams = streams as u8;
+
+ dmx.src.read_skip(4)?; //buf size
+ let width = dmx.src.read_u32le()?; //width
+ let height = dmx.src.read_u32le()? as i32; //height
+ dmx.src.read_skip(16)?; //reserved
+
+ dmx.cur_frame.resize(streams as usize, 0);
+ dmx.src.read_skip(size - 0x38)?;
+ Ok(size)
+}
+
+fn parse_junk(dmx: &mut AVIDemuxer, size: usize) -> DemuxerResult<usize> {
+ dmx.src.read_skip(size)?;
+ Ok(size)
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ use std::fs::File;
+
+ #[test]
+ fn test_avi_demux() {
+ let mut file = File::open("assets/laser05.avi").unwrap();
+ let mut fr = FileReader::new_read(&mut file);
+ let mut br = ByteReader::new(&mut fr);
+ let mut dmx = AVIDemuxer::new(&mut br);
+ dmx.open().unwrap();
+
+ loop {
+ let pktres = dmx.get_frame();
+ if let Err(e) = pktres {
+ if (e as i32) == (DemuxerError::EOF as i32) { break; }
+ panic!("error");
+ }
+ let pkt = pktres.unwrap();
+ println!("Got {}", pkt);
+ }
+ }
+}
projects / nihav.git / commitdiff