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|
use nihav_core::frame::*;
use nihav_core::demuxers::*;
#[allow(dead_code)]
struct QDemuxer<'a> {
src: &'a mut ByteReader<'a>,
vpts: u64,
apts: u64,
bps: usize,
a_id: Option<usize>,
v_id: Option<usize>,
nframes: usize,
duration: u64,
side_data: Vec<u8>,
}
impl<'a> DemuxCore<'a> for QDemuxer<'a> {
#[allow(unused_variables)]
fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
let src = &mut self.src;
let mut hdr = [0; 22];
src.read_buf(&mut hdr)?;
validate!(hdr[0] == 0x39);
validate!(hdr[1] == 0x68);
let version = hdr[2];
validate!(version >= 3 && version <= 7);
let mut width = read_u16le(&hdr[4..])? as usize;
let mut height = read_u16le(&hdr[6..])? as usize;
if version > 3 {
width *= hdr[8] as usize;
height *= hdr[9] as usize;
}
validate!(width > 0 && width <= 800);
validate!(height > 0 && height <= 600);
self.nframes = read_u16le(&hdr[10..])? as usize;
validate!(self.nframes > 0);
let fps = if hdr[16] == 0 { 5 } else { hdr[16] as u32 };
self.duration = (self.nframes as u64) * 1000 / u64::from(fps);
let asize = if version > 3 {
src.read_u32le()?
} else { 0 };
let vhdr = NAVideoInfo::new(width, height, false, PAL8_FORMAT);
let vci = NACodecTypeInfo::Video(vhdr);
let vinfo = NACodecInfo::new("legend-q-video", vci, Some(hdr.to_vec()));
self.v_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, fps, self.nframes as u64));
if asize != 0 {
let ntype = self.src.peek_byte()?;
if ntype == 8 {
let _ = self.src.read_u16le()?;
let size = self.src.read_u32le()? as usize;
validate!(size >= 44);
let mut buf = vec![0; size];
self.src.read_buf(&mut buf)?;
let arate = read_u32le(&buf[24..])?;
if arate > 0 {
let channels = buf[22];
let abits = buf[34] as usize;
validate!(abits == 8 || abits == 16);
self.bps = (channels as usize) * abits / 8;
let bsize = read_u16le(&buf[32..])? as usize;
let ahdr = NAAudioInfo::new(arate, channels as u8, if abits == 16 { SND_S16_FORMAT } else { SND_U8_FORMAT }, bsize);
let ainfo = NACodecInfo::new("pcm", NACodecTypeInfo::Audio(ahdr), None);
self.a_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, arate, 2));
}
}
}
self.apts = 0;
self.vpts = 0;
self.side_data.clear();
Ok(())
}
fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
loop {
let ctype = self.src.read_u16le()?;
let size = self.src.read_u32le()? as usize;
match ctype {
0xFFFF => return Err(DemuxerError::EOF),
0 => {
if let Some(a_id) = self.a_id {
let stream = strmgr.get_stream(a_id).unwrap();
let ts = stream.make_ts(Some(self.apts), None, None);
self.apts += (size / self.bps) as u64;
return self.src.read_packet(stream, ts, true, size);
} else {
self.src.read_skip(size)?;
}
},
1 => {
validate!(size <= 768);
let cur_len = self.side_data.len();
self.side_data.resize(cur_len + size + 6, 0);
self.side_data[cur_len] = ctype as u8;
write_u32le(&mut self.side_data[cur_len + 2..], size as u32)?;
self.src.read_buf(&mut self.side_data[cur_len + 6..])?;
},
2 | 3 | 4 | 11 => {
validate!(self.v_id.is_some());
let stream = strmgr.get_stream(self.v_id.unwrap_or(0)).unwrap();
let ts = stream.make_ts(Some(self.vpts), None, None);
self.vpts += 1;
let cur_len = self.side_data.len();
self.side_data.resize(cur_len + size + 6, 0);
self.side_data[cur_len] = ctype as u8;
self.side_data[cur_len] = ctype as u8;
write_u32le(&mut self.side_data[cur_len + 2..], size as u32)?;
if let Err(err) = self.src.read_buf(&mut self.side_data[cur_len + 6..]) {
self.side_data.truncate(cur_len);
return Err(err.into());
}
let mut buf = Vec::new();
std::mem::swap(&mut buf, &mut self.side_data);
return Ok(NAPacket::new(stream, ts, self.vpts == 1, buf));
},
5 => {
validate!(size <= 256);
let cur_len = self.side_data.len();
self.side_data.resize(cur_len + size + 6, 0);
self.side_data[cur_len] = ctype as u8;
write_u32le(&mut self.side_data[cur_len + 2..], size as u32)?;
self.src.read_buf(&mut self.side_data[cur_len + 6..])?;
},
6 | 7 => {
self.side_data.push(ctype as u8);
self.side_data.push(0);
self.side_data.push(0);
self.side_data.push(0);
self.side_data.push(0);
self.side_data.push(0);
},
8 => return Err(DemuxerError::InvalidData), //should be handled before main loop
9 => { // first part of interlaced frame
let cur_len = self.side_data.len();
self.side_data.resize(cur_len + size + 6, 0);
self.side_data[cur_len] = ctype as u8;
write_u32le(&mut self.side_data[cur_len + 2..], size as u32)?;
self.src.read_buf(&mut self.side_data[cur_len + 6..])?;
},
_ => {
self.src.read_skip(size)?;
},
};
}
}
fn seek(&mut self, _time: NATimePoint, _seek_index: &SeekIndex) -> DemuxerResult<()> {
Err(DemuxerError::NotPossible)
}
fn get_duration(&self) -> u64 { self.duration }
}
impl<'a> NAOptionHandler for QDemuxer<'a> {
fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
fn set_options(&mut self, _options: &[NAOption]) { }
fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
}
impl<'a> QDemuxer<'a> {
fn new(io: &'a mut ByteReader<'a>) -> Self {
QDemuxer {
src: io,
vpts: 0,
apts: 0,
bps: 0,
a_id: None,
v_id: None,
nframes: 0,
duration: 0,
side_data: Vec::with_capacity(256 + 6),
}
}
}
pub struct QDemuxerCreator { }
impl DemuxerCreator for QDemuxerCreator {
fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
Box::new(QDemuxer::new(br))
}
fn get_name(&self) -> &'static str { "legend-q" }
}
#[cfg(test)]
mod test {
use super::*;
use std::fs::File;
// samples from Death Gate, Mission Critical and Shannara games
#[test]
fn test_q_demux_v3() {
let mut file = File::open("assets/Game/dgate101.q").unwrap();
let mut fr = FileReader::new_read(&mut file);
let mut br = ByteReader::new(&mut fr);
let mut dmx = QDemuxer::new(&mut br);
let mut sm = StreamManager::new();
let mut si = SeekIndex::new();
dmx.open(&mut sm, &mut si).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);
}
}
#[test]
fn test_q_demux_v4() {
let mut file = File::open("assets/Game/1425A5.Q").unwrap();
let mut fr = FileReader::new_read(&mut file);
let mut br = ByteReader::new(&mut fr);
let mut dmx = QDemuxer::new(&mut br);
let mut sm = StreamManager::new();
let mut si = SeekIndex::new();
dmx.open(&mut sm, &mut si).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);
}
}
#[test]
fn test_q_demux_v5() {
let mut file = File::open("assets/Game/mc703.q").unwrap();
let mut fr = FileReader::new_read(&mut file);
let mut br = ByteReader::new(&mut fr);
let mut dmx = QDemuxer::new(&mut br);
let mut sm = StreamManager::new();
let mut si = SeekIndex::new();
dmx.open(&mut sm, &mut si).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);
}
}
}
|
