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use nihav_core::frame::*;
use nihav_core::demuxers::*;
use std::io::SeekFrom;
const HEADER_SIZE: usize = 0x330;
const FRAME_HDR_SIZE: usize = 10;
const CHTYPE_VIDEO: u8 = 0x02;
const CHTYPE_AUDIO: u8 = 0x01;
#[derive(Clone,Copy)]
struct FrameRec {
chtype: u8,
size: u32,
off: u32,
hdr: [u8; FRAME_HDR_SIZE],
ts: u32,
}
struct VMDDemuxer<'a> {
src: &'a mut ByteReader<'a>,
vid_id: usize,
aud_id: usize,
fno: usize,
is_indeo: bool,
frames: Vec<FrameRec>,
}
impl<'a> DemuxCore<'a> for VMDDemuxer<'a> {
#[allow(unused_variables)]
fn open(&mut self, strmgr: &mut StreamManager, _seek_index: &mut SeekIndex) -> DemuxerResult<()> {
let src = &mut self.src;
let mut header: [u8; HEADER_SIZE] = [0; HEADER_SIZE];
src.read_buf(&mut header)?;
let mut width = read_u16le(&header[12..])? as usize;
let mut height = read_u16le(&header[14..])? as usize;
self.is_indeo = &header[24..27] == b"iv3";
if self.is_indeo && width > 320 {
width >>= 1;
height >>= 1;
}
let nframes = read_u16le(&header[6..])? as usize;
let fpb = read_u16le(&header[18..])? as usize;
validate!(nframes > 0 && fpb > 0);
let mut edata: Vec<u8> = Vec::with_capacity(HEADER_SIZE);
edata.extend_from_slice(&header);
let vhdr = NAVideoInfo::new(width, height, false, PAL8_FORMAT);
let vci = NACodecTypeInfo::Video(vhdr);
let vinfo = NACodecInfo::new(if !self.is_indeo { "vmd-video" } else { "indeo3" }, vci, Some(edata));
self.vid_id = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, 1, 12)).unwrap();
let srate = u32::from(read_u16le(&header[804..])?);
let block_size;
if srate > 0 {
let bsize = read_u16le(&header[806..])? as usize;
let channels = if (header[811] & 0x8F) != 0 { 2 } else { 1 };
let is16bit;
if (bsize & 0x8000) != 0 {
is16bit = true;
block_size = 0x10000 - bsize;
} else {
is16bit = false;
block_size = bsize;
}
let ahdr = NAAudioInfo::new(srate, channels, if is16bit { SND_S16P_FORMAT } else { SND_U8_FORMAT }, block_size);
let ainfo = NACodecInfo::new("vmd-audio", NACodecTypeInfo::Audio(ahdr), None);
self.aud_id = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, 1, srate)).unwrap();
} else {
block_size = 0;
}
let adelay = u32::from(read_u16le(&header[808..])?);
let idx_off = u64::from(read_u32le(&header[812..])?);
src.seek(SeekFrom::Start(idx_off))?;
let mut offs: Vec<u32> = Vec::with_capacity(nframes);
for i in 0..nframes {
let _flags = src.read_u16le()?;
let off = src.read_u32le()?;
offs.push(off);
}
self.frames.reserve(nframes * fpb);
let mut ats = adelay;
for i in 0..nframes {
let mut off = offs[i];
for _ in 0..fpb {
let chtype = src.read_byte()?;
src.read_skip(1)?;
let mut size = src.read_u32le()?;
let mut hdr: [u8; FRAME_HDR_SIZE] = [0; FRAME_HDR_SIZE];
src.read_buf(&mut hdr)?;
if (i == 0) && (chtype == CHTYPE_AUDIO) && (size > 4) && ((size as usize) < block_size/2) {
size += 0x10000;
}
if (chtype == CHTYPE_VIDEO || chtype == CHTYPE_AUDIO) && (size > 0) {
let ts = if (i == 0) || (chtype != CHTYPE_AUDIO) {
i as u32
} else {
ats
};
self.frames.push(FrameRec { chtype, size, hdr, off, ts });
}
if i > 0 && chtype == CHTYPE_AUDIO {
ats += 1;
}
if chtype != 0 {
validate!(off.checked_add(size).is_some());
off += size;
}
}
}
self.fno = 0;
Ok(())
}
fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
if self.fno >= self.frames.len() { return Err(DemuxerError::EOF); }
let cur_frame = &self.frames[self.fno];
//println!("fno {} -> type {} size {} @ {:X} ts {}", self.fno, cur_frame.chtype, cur_frame.size, cur_frame.off, cur_frame.ts);
let next_pos = u64::from(cur_frame.off);
if self.src.tell() != next_pos {
self.src.seek(SeekFrom::Start(next_pos))?;
}
let is_video = cur_frame.chtype == CHTYPE_VIDEO;
let mut buf: Vec<u8> = Vec::with_capacity(FRAME_HDR_SIZE + (cur_frame.size as usize));
if !self.is_indeo || !is_video {
buf.extend_from_slice(&cur_frame.hdr);
buf.resize(FRAME_HDR_SIZE + (cur_frame.size as usize), 0);
self.src.read_buf(&mut buf[FRAME_HDR_SIZE..])?;
} else {
buf.resize(cur_frame.size as usize, 0);
self.src.read_buf(&mut buf)?;
}
self.fno += 1;
let str_id = if is_video { self.vid_id } else { self.aud_id };
let str = strmgr.get_stream(str_id).unwrap();
let (tb_num, tb_den) = str.get_timebase();
let ts = NATimeInfo::new(Some(u64::from(cur_frame.ts)), None, None, tb_num, tb_den);
let pkt = NAPacket::new(str, ts, false, buf);
Ok(pkt)
}
fn seek(&mut self, _time: u64, _seek_index: &SeekIndex) -> DemuxerResult<()> {
Err(DemuxerError::NotPossible)
}
}
impl<'a> VMDDemuxer<'a> {
fn new(io: &'a mut ByteReader<'a>) -> Self {
Self {
src: io,
vid_id: 0,
aud_id: 0,
fno: 0,
is_indeo: false,
frames: Vec::new(),
}
}
}
pub struct VMDDemuxerCreator { }
impl DemuxerCreator for VMDDemuxerCreator {
fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
Box::new(VMDDemuxer::new(br))
}
fn get_name(&self) -> &'static str { "vmd" }
}
#[cfg(test)]
mod test {
use super::*;
use std::fs::File;
#[test]
fn test_vmd_demux() {
let mut file = File::open("assets/Game/128.vmd").unwrap();
//let mut file = File::open("assets/Game/1491.VMD").unwrap();
let mut fr = FileReader::new_read(&mut file);
let mut br = ByteReader::new(&mut fr);
let mut dmx = VMDDemuxer::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);
}
}
}
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