+struct BMV3Demuxer<'a> {
+ src: &'a mut ByteReader<'a>,
+ vid_id: usize,
+ aud_id: usize,
+ vpos: u64,
+ apos: u64,
+ asize: usize,
+ ablob: usize,
+ pkt_buf: Vec<NAPacket>,
+}
+
+impl<'a> DemuxCore<'a> for BMV3Demuxer<'a> {
+ #[allow(unused_variables)]
+ fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
+ let src = &mut self.src;
+
+ let mut magic = [0u8; 4];
+ src.read_buf(&mut magic)?;
+ validate!(&magic[0..] == b"BMVi");
+ let size = src.read_u32le()?;
+ validate!(size == 24);
+ let _slot_size = src.read_u32le()? as usize;
+ let nframes = src.read_u32le()? as usize;
+ let _prefetch_slots = src.read_u16le()?;
+ let _cache_size = src.read_u16le()?;
+ let fps = src.read_u16le()? as u32;
+ let audio_size = src.read_u16le()? as usize;
+ let audio_blob_size = src.read_u16le()? as usize;
+ let _audio_id = src.read_byte()?;
+ let _video_id = src.read_byte()?;
+ let width = src.read_u16le()? as usize;
+ let height = src.read_u16le()? as usize;
+ validate!(nframes > 0);
+ validate!((width > 0) && (width <= 640));
+ validate!((height > 0) && (height <= 432));
+ validate!((audio_size > audio_blob_size) && (audio_blob_size > 0) && (audio_size % audio_blob_size == 0));
+ let mut dta = [0u8; 4];
+ src.read_buf(&mut dta)?;
+ validate!(&dta[0..] == b"DATA");
+ let data_size = src.read_u32le()? as usize;
+ validate!(data_size > 0);
+ self.asize = audio_size;
+ self.ablob = audio_blob_size;
+
+ let vhdr = NAVideoInfo::new(width, height, false, RGB565_FORMAT);
+ let vci = NACodecTypeInfo::Video(vhdr);
+ let vinfo = NACodecInfo::new("bmv3-video", vci, None);
+ self.vid_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 256, fps)).unwrap();
+
+ let ahdr = NAAudioInfo::new(22050, 2, SND_S16_FORMAT, audio_blob_size);
+ let ainfo = NACodecInfo::new("bmv3-audio", NACodecTypeInfo::Audio(ahdr), None);
+ self.aud_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, 22050)).unwrap();
+
+ self.vpos = 0;
+ self.apos = 0;
+ Ok(())
+ }
+
+ fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
+ if !self.pkt_buf.is_empty() {
+ return Ok(self.pkt_buf.pop().unwrap());
+ }
+
+ loop {
+ let ctype = self.src.read_byte()?;
+ if ctype == 0 { // NOP chunk
+ continue;
+ }
+ if ctype == 1 { return Err(DemuxerError::EOF); }
+ let size = self.src.read_u24le()? as usize;
+ if size == 0 { continue; }
+ let asize;
+ if (ctype & 0x20) != 0 {
+ if (ctype & 0x40) != 0 {
+ asize = self.asize - self.ablob;
+ } else {
+ asize = self.asize;
+ }
+ validate!(asize <= size);
+ let mut buf: Vec<u8> = vec![0; asize + 1];
+ buf[0] = (self.src.tell() & 1) as u8;
+ self.src.read_buf(&mut buf[1..])?;
+
+ let str = strmgr.get_stream(self.aud_id).unwrap();
+ let (tb_num, tb_den) = str.get_timebase();
+ let ts = NATimeInfo::new(Some(self.apos), None, None, tb_num, tb_den);
+ let apkt = NAPacket::new(str, ts, false, buf);
+
+ self.apos += (asize as u64) / 41 * 32;
+ self.pkt_buf.push(apkt);
+ } else {
+ asize = 0;
+ }
+ if size == asize {
+ if !self.pkt_buf.is_empty() {
+ return Ok(self.pkt_buf.pop().unwrap());
+ } else {
+ continue;
+ }
+ }
+ let mut buf: Vec<u8> = vec![0; size - asize + 1];
+ buf[0] = ctype;
+ self.src.read_buf(&mut buf[1..])?;
+
+ let str = strmgr.get_stream(self.vid_id).unwrap();
+ let (tb_num, tb_den) = str.get_timebase();
+ let ts = NATimeInfo::new(Some(self.vpos), None, None, tb_num, tb_den);
+ let pkt = NAPacket::new(str, ts, (ctype & 3) == 3, buf);
+
+ self.vpos += 1;
+ return Ok(pkt);
+ }
+ }
+
+ fn seek(&mut self, _time: u64, _seek_index: &SeekIndex) -> DemuxerResult<()> {
+ Err(DemuxerError::NotPossible)
+ }
+}
+
+impl<'a> BMV3Demuxer<'a> {
+ fn new(io: &'a mut ByteReader<'a>) -> Self {
+ Self {
+ src: io,
+ vid_id: 0,
+ aud_id: 0,
+ vpos: 0,
+ apos: 0,
+ asize: 0,
+ ablob: 0,
+ pkt_buf: Vec::with_capacity(1),
+ }
+ }
+}
+
+pub struct BMV3DemuxerCreator { }
+
+impl DemuxerCreator for BMV3DemuxerCreator {
+ fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
+ Box::new(BMV3Demuxer::new(br))
+ }
+ fn get_name(&self) -> &'static str { "bmv3" }
+}
+