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use nihav_core::demuxers::*;
struct VivoDemuxer<'a> {
src: &'a mut ByteReader<'a>,
video_id: usize,
audio_id: usize,
video_buf: Vec<u8>,
vpts: u64,
apts: u64,
v_num: u32,
v_den: u32,
a_num: u32,
a_den: u32,
fps: f32,
width: usize,
height: usize,
vname: &'static str,
aname: &'static str,
}
fn read_size(br: &mut ByteReader) -> DemuxerResult<usize> {
let mut ret = 0;
loop {
let c = br.read_byte()?;
ret = (ret << 7) | ((c & 0x7F) as usize);
if (c & 0x80) == 0 {
break;
}
}
Ok(ret)
}
impl<'a> DemuxCore<'a> for VivoDemuxer<'a> {
fn open(&mut self, strmgr: &mut StreamManager, _seek_idx: &mut SeekIndex) -> DemuxerResult<()> {
let mut hdr_data: Vec<u8> = Vec::with_capacity(256);
loop {
let hdr = self.src.peek_byte()?;
if (hdr & 0xF0) != 0 { break; }
self.src.read_skip(1)?;
let hdr_len = read_size(&mut self.src)?;
hdr_data.resize(hdr_len, 0);
self.src.read_buf(&mut hdr_data)?;
self.parse_header_packet(&hdr_data)?;
}
validate!(self.vname != "none");
if self.width == 0 && self.height == 0 {
self.width = 160;
self.height = 120;
}
validate!(self.fps > 0.0 || (self.v_num > 0 && self.v_den > 0));
if self.v_num == 0 {
self.v_num = 1000;
self.v_den = (self.fps * 1000.0) as u32;
}
let vhdr = NAVideoInfo::new(self.width, self.height, false, YUV420_FORMAT);
let vinfo = NACodecInfo::new(self.vname, NACodecTypeInfo::Video(vhdr), None);
let res = strmgr.add_stream(NAStream::new(StreamType::Video, 0, vinfo, self.v_num, self.v_den));
validate!(res.is_some());
self.video_id = res.unwrap();
if self.aname == "none" && self.vname == "vivo1" {
self.aname = "g723.1";
self.a_num = 240;
self.a_den = 8000;
}
if self.aname != "none" {
let ahdr = NAAudioInfo::new(self.a_den, 1, SND_S16_FORMAT, self.a_num as usize);
let ainfo = NACodecInfo::new(self.aname, NACodecTypeInfo::Audio(ahdr), None);
let res = strmgr.add_stream(NAStream::new(StreamType::Audio, 1, ainfo, self.a_num, self.a_den));
validate!(res.is_some());
self.audio_id = res.unwrap();
}
Ok(())
}
fn get_frame(&mut self, strmgr: &mut StreamManager) -> DemuxerResult<NAPacket> {
let br = &mut self.src;
loop {
let ret = br.read_byte();
let hdr1 = match ret {
Err(ByteIOError::EOF) => return Err(DemuxerError::EOF),
Err(error) => return Err(error.into()),
Ok(val) => val,
};
let force_size = hdr1 == 0x82;
let hdr = if force_size { br.read_byte()? } else { hdr1 };
let (is_video, mut size) = match hdr >> 4 {
1 => { (true, 128) },
2 => { validate!(!force_size); (true, read_size(br)?) },
3 => { (false, 40) },
4 => { (false, 24) },
_ => return Err(DemuxerError::InvalidData),
};
if force_size {
size = read_size(br)?;
}
if is_video {
validate!(self.v_den != 0);
let cur_size = self.video_buf.len();
let new_size = cur_size + size;
self.video_buf.resize(new_size, 0);
br.read_buf(&mut self.video_buf[cur_size..])?;
if (hdr >> 4) == 2 {
let mut buf = Vec::new();
std::mem::swap(&mut self.video_buf, &mut buf);
let strres = strmgr.get_stream(self.video_id);
validate!(strres.is_some());
let stream = strres.unwrap();
let ts = NATimeInfo::new(Some(self.vpts), None, None, self.v_num, self.v_den);
let pkt = NAPacket::new(stream, ts, self.vpts == 0, buf);
self.vpts += 1;
return Ok(pkt);
}
} else {
validate!(self.a_den != 0);
let mut buf: Vec<u8> = vec![0; size];
br.read_buf(&mut buf)?;
let strres = strmgr.get_stream(self.audio_id);
validate!(strres.is_some());
let stream = strres.unwrap();
let ts = NATimeInfo::new(Some(self.apts), None, None, self.a_num, self.a_den);
let pkt = NAPacket::new(stream, ts, true, buf);
self.apts += 1;
return Ok(pkt);
}
}
}
fn seek(&mut self, _time: u64, _seek_idx: &SeekIndex) -> DemuxerResult<()> {
Err(DemuxerError::NotPossible)
}
}
impl<'a> NAOptionHandler for VivoDemuxer<'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> VivoDemuxer<'a> {
fn new(io: &'a mut ByteReader<'a>) -> Self {
VivoDemuxer {
src: io,
video_id: 0,
audio_id: 0,
video_buf: Vec::new(),
vpts: 0,
apts: 0,
v_num: 0,
v_den: 0,
a_num: 0,
a_den: 0,
width: 0,
height: 0,
fps: 0.0,
vname: "none",
aname: "none",
}
}
fn parse_header_packet(&mut self, pkt: &[u8]) -> DemuxerResult<()> {
for entry in pkt.split(|ch| *ch == 0xD) {
if entry.len() < 3 || !entry.contains(&b':') { continue; }
let entry = if !entry.is_empty() && entry[0] == 0xA { &entry[1..] } else { entry };
let mut split = entry.split(|ch| *ch == b':');
let name = split.next().unwrap();
let value = split.next().unwrap();
let valstr = String::from_utf8_lossy(value);
match name {
b"Version" => {
match value {
b"Vivo/0.90" => { self.vname = "vivo1"; },
b"Vivo/1.00" => { self.vname = "vivo1"; },
b"Vivo/2.00" => { self.vname = "vivo2"; },
_ => {
println!("Unknown codec name {}", valstr);
return Err(DemuxerError::InvalidData);
},
};
},
b"FPS" => {
self.fps = if let Ok(val) = valstr.parse() {
val
} else { return Err(DemuxerError::InvalidData); };
validate!(self.fps > 0.0 && self.fps < 1000.0);
},
b"Width" => {
self.width = if let Ok(val) = valstr.parse() {
val
} else { return Err(DemuxerError::InvalidData); };
validate!(self.width > 0 && self.width <= 1024);
},
b"Height" => {
self.height = if let Ok(val) = valstr.parse() {
val
} else { return Err(DemuxerError::InvalidData); };
validate!(self.height > 0 && self.height <= 768);
},
b"SamplingFrequency" => {
let samp_freq: u32 = if let Ok(val) = valstr.parse() {
val
} else { return Err(DemuxerError::InvalidData); };
validate!(samp_freq == 8000 || samp_freq == 16000);
if samp_freq == 8000 {
self.aname = "g723.1";
self.a_num = 240;
self.a_den = 8000;
} else if samp_freq == 16000 {
self.aname = "siren";
self.a_num = 320;
self.a_den = 16000;
} else {
return Err(DemuxerError::InvalidData);
};
},
/* b"TimeUnitNumerator" => {
self.v_num = if let Ok(val) = valstr.parse() {
val
} else { return Err(DemuxerError::InvalidData); };
validate!(self.v_num > 0);
println!(" video codec tb_num {}", self.v_num);
},
b"TimeUnitDenominator" => {
self.v_den = if let Ok(val) = valstr.parse() {
val
} else { return Err(DemuxerError::InvalidData); };
validate!(self.v_den > 0);
println!(" video codec tb_den {}", self.v_den);
},*/
_ => { },
};
}
Ok(())
}
}
pub struct VivoDemuxerCreator { }
impl DemuxerCreator for VivoDemuxerCreator {
fn new_demuxer<'a>(&self, br: &'a mut ByteReader<'a>) -> Box<dyn DemuxCore<'a> + 'a> {
Box::new(VivoDemuxer::new(br))
}
fn get_name(&self) -> &'static str { "vivo" }
}
#[cfg(test)]
mod test {
use super::*;
use std::fs::File;
#[test]
fn test_vivo_demux() {
// let mut file = File::open("assets/Misc/greetings.viv").unwrap();
let mut file = File::open("assets/Misc/favmovie.viv").unwrap();
let mut fr = FileReader::new_read(&mut file);
let mut br = ByteReader::new(&mut fr);
let mut dmx = VivoDemuxer::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 {:?}", e);
}
let pkt = pktres.unwrap();
println!("Got {}", pkt);
}
}
}
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