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use nihav_core::codecs::*;
struct RawDecoder {
info: NACodecInfoRef,
}
impl RawDecoder {
fn new() -> Self {
Self {
info: NACodecInfo::new_dummy(),
}
}
}
impl NADecoder for RawDecoder {
fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
if let NACodecTypeInfo::Video(_vinfo) = info.get_properties() {
self.info = info.clone();
Ok(())
} else {
Err(DecoderError::InvalidData)
}
}
fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
if let NACodecTypeInfo::Video(ref vinfo) = self.info.get_properties() {
let src = pkt.get_buffer();
let width = vinfo.width;
let height = vinfo.height;
let ncomp = vinfo.format.components as usize;
let buf = if vinfo.format.is_unpacked() && vinfo.format.get_max_depth() == 8 {
let mut offs = vec![0; ncomp];
let mut strides = Vec::with_capacity(ncomp);
let mut sizes = Vec::with_capacity(ncomp);
for chr in vinfo.format.comp_info[..ncomp].iter() {
if let Some(chromaton) = chr {
let stride = chromaton.get_linesize(width);
let size = stride * chromaton.get_height(height);
sizes.push(size);
strides.push(stride);
} else {
return Err(DecoderError::InvalidData);
}
}
let mut off = 0;
for i in 0..ncomp {
for (cno, chr) in vinfo.format.comp_info[..ncomp].iter().enumerate() {
if let Some(chromaton) = chr {
let comp_off = chromaton.comp_offs as usize;
validate!(comp_off < ncomp);
if comp_off != i {
continue;
}
offs[cno] = off;
off += sizes[i];
}
}
}
validate!(off == src.len());
NABufferType::Video(NAVideoBuffer::from_raw_parts(*vinfo, src, offs, strides).into_ref())
} else {
let esize = vinfo.format.elem_size as usize;
let ychr = vinfo.format.get_chromaton(0).unwrap();
let ystep = if ychr.next_elem != 0 { ychr.next_elem as usize } else { esize };
let stride = (width * esize + ystep - 1) / ystep;
let offs = vec![0];
let strides = vec![stride];
NABufferType::VideoPacked(NAVideoBuffer::from_raw_parts(*vinfo, src, offs, strides).into_ref())
};
let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), buf);
frm.set_keyframe(true);
frm.set_frame_type(FrameType::I);
Ok(frm.into_ref())
} else {
Err(DecoderError::Bug)
}
}
fn flush(&mut self) {}
}
impl NAOptionHandler for RawDecoder {
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(RawDecoder::new())
}
#[cfg(test)]
mod test {
use nihav_core::codecs::RegisteredDecoders;
use nihav_core::demuxers::RegisteredDemuxers;
use nihav_codec_support::test::dec_video::*;
use crate::generic_register_all_decoders;
use crate::generic_register_all_demuxers;
#[test]
fn test_rawvideo() {
let mut dmx_reg = RegisteredDemuxers::new();
generic_register_all_demuxers(&mut dmx_reg);
let mut dec_reg = RegisteredDecoders::new();
generic_register_all_decoders(&mut dec_reg);
// sample: self-created with avconv
test_decoding("yuv4mpeg", "rawvideo", "assets/Misc/test.y4m", None, &dmx_reg,
&dec_reg, ExpectedTestResult::MD5Frames(vec![
[0xd58326b0, 0xdbfc1dcc, 0x6d66a04c, 0x08a21bbb],
[0x9b2cb5c5, 0x69b5f261, 0xcaccaaaf, 0xff2a807d]]));
}
}
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