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use nihav_core::codecs::*;
use nihav_core::io::byteio::*;
use nihav_core::io::bitreader::*;
const HEADER_SIZE: usize = 0x2F;
const MV_2BIT: [(i8, i8); 4] = [(-1, 0), (-1, -1), (1, -1), (0, -2)];
const MV_4BIT: [(i8, i8); 16] = [
(-2, -3), ( 2, -3), (-1, -4), ( 1, -4),
(-1, -2), ( 1, -2), ( 0, -3), ( 0, -4),
(-2, 0), (-2, -1), ( 2, -1), (-2, -2),
( 2, -2), (-1, -3), ( 1, -3), ( 0, -5)
];
const BPP: usize = 4;
struct ArxelVideoDecoder {
info: NACodecInfoRef,
tiles: [u8; 65536],
}
impl ArxelVideoDecoder {
fn new() -> Self {
Self {
info: NACodecInfoRef::default(),
tiles: [0; 65536],
}
}
}
const RGBA_FORMAT: NAPixelFormaton = NAPixelFormaton {
model: ColorModel::RGB(RGBSubmodel::RGB), components: 4,
comp_info: [
Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 2, next_elem: 4 }),
Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 1, next_elem: 4 }),
Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 0, next_elem: 4 }),
Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, packed: true, depth: 8, shift: 0, comp_offs: 3, next_elem: 4 }),
None ],
elem_size: 4, be: false, alpha: true, palette: false };
impl NADecoder for ArxelVideoDecoder {
fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(vinfo.get_width(), vinfo.get_height(), true, RGBA_FORMAT));
self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
Ok(())
} else {
Err(DecoderError::InvalidData)
}
}
fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
let src = pkt.get_buffer();
validate!(src.len() > HEADER_SIZE);
let mut mr = MemoryReader::new_read(&src);
let mut br = ByteReader::new(&mut mr);
let size = br.read_u32le()? as usize;
validate!(src.len() >= size + HEADER_SIZE);
let part2_off = br.read_u32le()? as u64;
validate!(part2_off > 0 && part2_off < (size as u64));
let num_tiles = br.read_u16le()? as usize;
validate!(num_tiles > 0 && num_tiles < 4096);
let tile_size = br.read_u16le()? as usize;
let width = br.read_u32le()? as usize;
let height = br.read_u32le()? as usize;
let vinfo = self.info.get_properties().get_video_info().unwrap();
validate!(width == vinfo.get_width());
validate!(height == vinfo.get_height());
br.seek(SeekFrom::Start(part2_off + (HEADER_SIZE as u64)))?;
let tile_w = if tile_size == 2 { 2 } else { 4 };
let tsize = tile_w * BPP;
match tile_size {
2 | 4 => {
br.read_buf(&mut self.tiles[..tsize])?;
let off = br.tell() as usize;
let mut bir = BitReader::new(&src[off..], BitReaderMode::BE);
for tile in 1..num_tiles {
for i in 0..tsize {
self.tiles[tile * tsize + i] = self.tiles[tile * tsize + i - tsize];
}
let bits = bir.read(3)? as u8 + 1;
validate!(bits < 8);
for el in self.tiles[tile * tsize..][..tsize].iter_mut() {
let mut delta = bir.read(bits)? as i16;
if delta != 0 && bir.read_bool()? {
delta = -delta;
}
*el = (i16::from(*el) + delta) as u8;
}
}
},
_ => {
validate!(tile_size == num_tiles * tsize);
br.read_buf(&mut self.tiles[..tile_size])?;
},
};
let bufinfo = alloc_video_buffer(vinfo, 0)?;
let bufo = bufinfo.get_vbuf();
let mut buf = bufo.unwrap();
let stride = buf.get_stride(0);
let data = buf.get_data_mut().unwrap();
let dst = data.as_mut_slice();
let mut br = BitReader::new(&src[HEADER_SIZE..], BitReaderMode::BE);
let idx_bits = if num_tiles < 0x400 { 10 } else if num_tiles < 0x800 { 11 } else { 12 };
for y in (0..height).step_by(2) {
for x in (0..width).step_by(tile_w) {
let dst_pos = x * BPP + y * stride;
if !br.read_bool()? {
let idx = br.read(idx_bits)? as usize;
validate!(idx < num_tiles);
dst[dst_pos..][..tsize].copy_from_slice(&self.tiles[idx * tsize..][..tsize]);
} else {
let (mv_x, mv_y) = if br.read_bool()? {
(0, -1)
} else if br.read_bool()? {
MV_2BIT[br.read(2)? as usize]
} else {
MV_4BIT[br.read(4)? as usize]
};
let isrc = (dst_pos as isize) + isize::from(mv_x) * (tsize as isize) + isize::from(mv_y) * ((stride * 2) as isize);
validate!(isrc >= 0);
let src_pos = isrc as usize;
validate!(src_pos + tsize <= dst.len());
let (src, dst) = dst.split_at_mut(dst_pos);
dst[..tsize].copy_from_slice(&src[src_pos..][..tsize]);
}
}
// double lines
let lines = &mut dst[y * stride..];
let (src, dst) = lines.split_at_mut(stride);
dst[..stride].copy_from_slice(src);
}
let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
frm.set_keyframe(true);
frm.set_frame_type(FrameType::I);
Ok(frm.into_ref())
}
fn flush(&mut self) {
}
}
impl NAOptionHandler for ArxelVideoDecoder {
fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
fn set_options(&mut self, _options: &[NAOption]) { }
fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
}
pub fn get_decoder() -> Box<dyn NADecoder + Send> {
Box::new(ArxelVideoDecoder::new())
}
#[cfg(test)]
mod test {
use nihav_core::codecs::RegisteredDecoders;
use nihav_core::demuxers::RegisteredDemuxers;
use nihav_codec_support::test::dec_video::*;
use crate::game_register_all_decoders;
use crate::game_register_all_demuxers;
// sample from the Ring game
#[test]
fn test_arxel_video() {
let mut dmx_reg = RegisteredDemuxers::new();
game_register_all_demuxers(&mut dmx_reg);
let mut dec_reg = RegisteredDecoders::new();
game_register_all_decoders(&mut dec_reg);
test_decoding("arxel-cnm", "arxel-video", "assets/Game/logo.cnm", Some(10), &dmx_reg, &dec_reg,
ExpectedTestResult::MD5([0x9b1fc970, 0x1fe86e2c, 0x44dd9255, 0x3920c49b]));
}
}
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