--- /dev/null
+use nihav_core::frame::*;
+use nihav_core::demuxers::*;
+use nihav_core::io::byteio::*;
+use nihav_core::formats::*;
+//use std::collections::HashMap;
+
+enum GDVState {
+ NewFrame,
+ AudioRead,
+}
+
+#[allow(dead_code)]
+struct GremlinVideoDemuxer<'a> {
+ src: &'a mut ByteReader<'a>,
+ frames: u16,
+ cur_frame: u16,
+ asize: usize,
+ apacked: bool,
+ state: GDVState,
+ pktdta: Vec<u8>,
+ a_id: Option<usize>,
+ v_id: Option<usize>,
+}
+
+struct GDVFixedSizes {
+ id: u16,
+ width: u16,
+ height: u16,
+}
+const GDV_SIZE_TABLE: &[GDVFixedSizes] = &[
+ GDVFixedSizes { id: 0, width: 320, height: 200 },
+ GDVFixedSizes { id: 1, width: 640, height: 200 },
+ GDVFixedSizes { id: 2, width: 320, height: 167 },
+ GDVFixedSizes { id: 3, width: 320, height: 180 },
+ GDVFixedSizes { id: 4, width: 320, height: 400 },
+ GDVFixedSizes { id: 5, width: 320, height: 170 },
+ GDVFixedSizes { id: 6, width: 160, height: 85 },
+ GDVFixedSizes { id: 7, width: 160, height: 83 },
+ GDVFixedSizes { id: 8, width: 160, height: 90 },
+ GDVFixedSizes { id: 9, width: 280, height: 128 },
+ GDVFixedSizes { id: 10, width: 320, height: 240 },
+ GDVFixedSizes { id: 11, width: 320, height: 201 },
+ GDVFixedSizes { id: 16, width: 640, height: 400 },
+ GDVFixedSizes { id: 17, width: 640, height: 200 },
+ GDVFixedSizes { id: 18, width: 640, height: 180 },
+ GDVFixedSizes { id: 19, width: 640, height: 167 },
+ GDVFixedSizes { id: 20, width: 640, height: 170 },
+ GDVFixedSizes { id: 21, width: 320, height: 240 },
+];
+
+impl<'a> DemuxCore<'a> for GremlinVideoDemuxer<'a> {
+ #[allow(unused_variables)]
+ fn open(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<()> {
+ let src = &mut self.src;
+ let magic = src.read_u32le()?;
+ if magic != 0x29111994 { return Err(DemuxerError::InvalidData); }
+ let id = src.read_u16le()?;
+ let frames = src.read_u16le()?;
+ let fps = src.read_u16le()?;
+ let aflags = src.read_u16le()?;
+ let rate = src.read_u16le()?;
+ let depth = src.read_u16le()?;
+ let max_fs = src.read_u16le()?;
+ src.read_skip(2)?;
+ let mut width = src.read_u16le()?;
+ let mut height = src.read_u16le()?;
+ if (width == 0) && (height == 0) {
+ for el in GDV_SIZE_TABLE {
+ if el.id == id {
+ width = el.width;
+ height = el.height;
+ break;
+ }
+ }
+ if (width == 0) && (height == 0) { return Err(DemuxerError::InvalidData); }
+ }
+ if max_fs > 0 {
+ let mut edata: Vec<u8> = Vec::with_capacity(768);
+ if depth == 1 {
+ edata.resize(768, 0);
+ src.read_buf(edata.as_mut_slice())?;
+ }
+ let vhdr = NAVideoInfo::new(width as usize, height as usize, false, PAL8_FORMAT);
+ let vci = NACodecTypeInfo::Video(vhdr);
+ let vinfo = NACodecInfo::new("gdv-video", vci, if edata.len() == 0 { None } else { Some(edata) });
+ self.v_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, fps as u32));
+ }
+ if (aflags & 1) != 0 {
+ let channels = if (aflags & 2) != 0 { 2 } else { 1 };
+ let packed = if (aflags & 8) != 0 { 1 } else { 0 };
+ let depth = if (aflags & 4) != 0 { 16 } else { 8 };
+
+ let ahdr = NAAudioInfo::new(rate as u32, channels as u8, if depth == 16 { SND_S16_FORMAT } else { SND_U8_FORMAT }, 2);
+ let ainfo = NACodecInfo::new(if packed != 0 { "gdv-audio" } else { "pcm" },
+ NACodecTypeInfo::Audio(ahdr), None);
+ self.a_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, rate as u32));
+
+ self.asize = (((rate / fps) * channels * (depth / 8)) >> packed) as usize;
+ self.apacked = (aflags & 8) != 0;
+ }
+ self.frames = frames;
+ self.state = GDVState::NewFrame;
+ Ok(())
+ }
+
+ #[allow(unused_variables)]
+ fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
+ if self.cur_frame >= self.frames { return Err(DemuxerError::EOF); }
+ match self.state {
+ GDVState::NewFrame if self.asize > 0 => { self.read_achunk(strmgr) }
+ _ => { self.read_vchunk(strmgr) }
+ }
+ }
+
+ #[allow(unused_variables)]
+ fn seek(&mut self, time: u64) -> DemuxerResult<()> {
+ Err(DemuxerError::NotImplemented)
+ }
+}
+/*impl<'a> Drop for GremlinVideoDemuxer<'a> {
+ #[allow(unused_variables)]
+ fn drop(&mut self) {
+ }
+}*/
+impl<'a> GremlinVideoDemuxer<'a> {
+ fn new(io: &'a mut ByteReader<'a>) -> Self {
+ GremlinVideoDemuxer {
+ cur_frame: 0,
+ frames: 0,
+ asize: 0,
+ apacked: false,
+ state: GDVState::NewFrame,
+pktdta: Vec::new(),
+ src: io,
+ a_id: None,
+ v_id: None,
+ }
+ }
+
+ fn read_achunk(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
+ self.state = GDVState::AudioRead;
+ let str = strmgr.get_stream(self.a_id.unwrap()).unwrap();
+ let (tb_num, tb_den) = str.get_timebase();
+ let ts = NATimeInfo::new(Some(self.cur_frame as u64), None, None, tb_num, tb_den);
+ self.src.read_packet(str, ts, true, self.asize)
+ }
+
+ fn read_vchunk(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
+ let str = strmgr.get_stream(self.v_id.unwrap()).unwrap();
+ let src = &mut self.src;
+ let magic = src.read_u16be()?;
+ if magic != 0x0513 { return Err(DemuxerError::InvalidData); }
+ let size = (src.read_u16le()? as usize) + 4;
+ let tmp = src.peek_u32le()?;
+ let flags = (tmp & 0xFF) as usize;
+ self.state = GDVState::NewFrame;
+ self.cur_frame = self.cur_frame + 1;
+ let (tb_num, tb_den) = str.get_timebase();
+ let ts = NATimeInfo::new(Some((self.cur_frame - 1) as u64), None, None, tb_num, tb_den);
+ src.read_packet(str, ts, if (flags & 64) != 0 { true } else { false }, size)
+ }
+}
+
+pub struct GDVDemuxerCreator { }
+
+impl DemuxerCreator for GDVDemuxerCreator {
+ fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<DemuxCore<'a> + 'a> {
+ Box::new(GremlinVideoDemuxer::new(br))
+ }
+ fn get_name(&self) -> &'static str { "gdv" }
+}
+
+#[cfg(test)]
+mod test {
+ use super::*;
+ use std::fs::File;
+
+ #[test]
+ fn test_gdv_demux() {
+ let mut file = File::open("assets/intro1.gdv").unwrap();
+ let mut fr = FileReader::new_read(&mut file);
+ let mut br = ByteReader::new(&mut fr);
+ let mut dmx = GremlinVideoDemuxer::new(&mut br);
+ let mut sm = StreamManager::new();
+ dmx.open(&mut sm).unwrap();
+ loop {
+ let pktres = dmx.get_frame(&mut sm);
+ 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 / blobdiff