From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Sat, 6 May 2017 11:45:15 +0000 (+0200)
Subject: demuxer initial work
X-Git-Url: https://git.nihav.org/?a=commitdiff_plain;h=5869fd634c6a174ef2c541ddad4b1a4e9ec26d29;p=nihav.git

demuxer initial work
---

diff --git a/src/demuxers/gdv.rs b/src/demuxers/gdv.rs
new file mode 100644
index 0000000..c556197
--- /dev/null
+++ b/src/demuxers/gdv.rs
@@ -0,0 +1,157 @@
+use super::*;
+use io::byteio::*;
+use frame::*;
+use std::io::SeekFrom;
+//use std::collections::HashMap;
+
+enum GDVState {
+    NewFrame,
+    AudioRead,
+}
+
+#[allow(dead_code)]
+pub struct GremlinVideoDemuxer<'a> {
+    opened: bool,
+    src:    &'a mut ByteReader<'a>,
+    streams: Vec<Rc<NAStream<'a>>>,
+    frames: u16,
+    cur_frame: u16,
+    asize: usize,
+    apacked: bool,
+    state: GDVState,
+    pktdta: Vec<u8>,
+}
+
+impl<'a> NADemuxer<'a> for GremlinVideoDemuxer<'a> {
+    #[allow(unused_variables)]
+    fn open(&mut self) -> DemuxerResult<()> {
+        let src = &mut self.src;
+        let magic = src.read_u32le()?;
+        if magic != 0x29111994 { return Err(DemuxerError::InvalidData); }
+        let id = src.read_u16le()?;
+        let frames = src.read_u16le()?;
+        let fps = src.read_u16le()?;
+        let aflags = src.read_u16le()?;
+        let rate = src.read_u16le()?;
+        let depth = src.read_u16le()?;
+        let max_fs = src.read_u16le()?;
+        src.read_skip(2)?;
+        let width = src.read_u16le()?;
+        let height = src.read_u16le()?;
+println!("id {} frames {} fps {} sound {} Hz {:X} img {} - {}x{}",id,frames,fps,rate,aflags,depth,width,height);
+        if max_fs > 0 {
+            let vhdr = NAVideoInfo::new(width as u32, height as u32, false, PAL8_FORMAT);
+            let vci = NACodecTypeInfo::Video(vhdr);
+            let vinfo = NACodecInfo::new(vci, None);
+            let vstr = NAStream::new(StreamType::Video, 0, vinfo);
+            self.streams.push(Rc::new(vstr));
+        }
+        if (aflags & 1) != 0 {
+            let channels = if (aflags & 2) != 0 { 2 } else { 1 };
+            let ahdr = NAAudioInfo::new(rate as u32, channels as u8, if (aflags & 4) != 0 { SND_S16_FORMAT } else { SND_U8_FORMAT }, 2);
+            let ainfo = NACodecInfo::new(NACodecTypeInfo::Audio(ahdr), None);
+            let astr = NAStream::new(StreamType::Audio, 1, ainfo);
+            self.streams.push(Rc::new(astr));
+
+            let packed = if (aflags & 8) != 0 { 1 } else { 0 };
+            self.asize = (((rate / fps) * channels * (if (aflags & 4) != 0 { 2 } else { 1 })) >> packed) as usize;
+            self.apacked = (aflags & 8) != 0;
+println!("audio chunk size {}({:X})",self.asize,self.asize);
+        }
+        if max_fs > 0 && depth == 1 {
+            src.read_skip(768)?;
+        }
+        self.frames = frames;
+        self.opened = true;
+        self.state = GDVState::NewFrame;
+        Ok(())
+    }
+
+    #[allow(unused_variables)]
+    fn get_frame(&mut self) -> DemuxerResult<NAPacket> {
+        if !self.opened { return Err(DemuxerError::NoSuchInput); }
+        if self.cur_frame >= self.frames { return Err(DemuxerError::EOF); }
+        match self.state {
+            GDVState::NewFrame if self.asize > 0 => { self.read_achunk() }
+            _ => { self.read_vchunk() }
+        }
+    }
+
+    #[allow(unused_variables)]
+    fn seek(&mut self, time: u64) -> DemuxerResult<()> {
+        if !self.opened { return Err(DemuxerError::NoSuchInput); }
+        Err(DemuxerError::NotImplemented)
+    }
+}
+/*impl<'a> Drop for GremlinVideoDemuxer<'a> {
+    #[allow(unused_variables)]
+    fn drop(&mut self) {
+    }
+}*/
+impl<'a> GremlinVideoDemuxer<'a> {
+    pub fn new(io: &'a mut ByteReader<'a>) -> Self {
+        GremlinVideoDemuxer {
+            cur_frame: 0,
+            frames: 0,
+            opened: false,
+            asize: 0,
+            apacked: false,
+            state: GDVState::NewFrame,
+pktdta: Vec::new(),
+            src: io,
+            streams: Vec::new()
+        }
+    }
+
+    fn find_stream(&mut self, id: u32) -> Rc<NAStream<'a>> {
+        for i in 0..self.streams.len() {
+            if self.streams[i].get_id() == id {
+                return self.streams[i].clone();
+            }
+        }
+        panic!("stream not found");
+    }
+    fn read_achunk(&mut self) -> DemuxerResult<NAPacket> {
+        self.state = GDVState::AudioRead;
+        let str = self.find_stream(1);
+        self.src.read_packet(str, Some(self.cur_frame as u64), None, None, true, self.asize)
+    }
+
+    fn read_vchunk(&mut self) -> DemuxerResult<NAPacket> {
+        let str = self.find_stream(0);
+        let mut src = &mut self.src;
+        let magic = src.read_u16be()?;
+        if magic != 0x0513 { return Err(DemuxerError::InvalidData); }
+        let size = (src.read_u16le()? as usize) + 4;
+        let tmp = src.read_u32le()?;
+        let flags = (tmp & 0xFF) as usize;
+        src.seek(SeekFrom::Current(-4))?;
+        self.state = GDVState::NewFrame;
+        self.cur_frame = self.cur_frame + 1;
+        src.read_packet(str, Some((self.cur_frame - 1) as u64), None, None, if (flags & 64) != 0 { true } else { false }, size)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use std::fs::File;
+
+    #[test]
+    fn test_gdv_demux() {
+        let mut file = File::open("assets/intro1.gdv").unwrap();
+        let mut fr = FileReader::new_read(&mut file);
+        let mut br = ByteReader::new(&mut fr);
+        let mut dmx = GremlinVideoDemuxer::new(&mut br);
+        dmx.open().unwrap();
+        loop {
+            let pktres = dmx.get_frame();
+            if let Err(e) = pktres {
+                if (e as i32) == (DemuxerError::EOF as i32) { break; }
+                panic!("error");
+            }
+            let pkt = pktres.unwrap();
+            println!("Got {}", pkt);
+        }
+    }
+}
diff --git a/src/demuxers/mod.rs b/src/demuxers/mod.rs
new file mode 100644
index 0000000..5c397ac
--- /dev/null
+++ b/src/demuxers/mod.rs
@@ -0,0 +1,142 @@
+pub mod gdv;
+
+use std::fmt;
+use std::rc::Rc;
+use frame::*;
+//use std::collections::HashMap;
+use io::byteio::*;
+
+#[derive(Debug)]
+#[allow(dead_code)]
+pub enum StreamType {
+    Video,
+    Audio,
+    Subtitles,
+    Data,
+}
+
+impl fmt::Display for StreamType {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match *self {
+            StreamType::Video => write!(f, "Video"),
+            StreamType::Audio => write!(f, "Audio"),
+            StreamType::Subtitles => write!(f, "Subtitles"),
+            StreamType::Data => write!(f, "Data"),
+        }
+    }
+}
+
+
+#[allow(dead_code)]
+pub struct NAStream<'a> {
+    media_type:     StreamType,
+    id:             u32,
+    info:           Rc<NACodecInfo<'a>>,
+}
+
+impl<'a> NAStream<'a> {
+    pub fn new(mt: StreamType, id: u32, info: NACodecInfo<'a>) -> Self {
+        NAStream { media_type: mt, id: id, info: Rc::new(info) }
+    }
+    pub fn get_id(&self) -> u32 { self.id }
+    pub fn get_info(&self) -> Rc<NACodecInfo<'a>> { self.info.clone() }
+}
+
+impl<'a> fmt::Display for NAStream<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "({}#{})", self.media_type, self.id)
+    }
+}
+
+#[allow(dead_code)]
+pub struct NAPacket<'a> {
+    stream:         Rc<NAStream<'a>>,
+    pts:            Option<u64>,
+    dts:            Option<u64>,
+    duration:       Option<u64>,
+    buffer:         Rc<Vec<u8>>,
+    keyframe:       bool,
+//    options:        HashMap<String, NAValue<'a>>,
+}
+
+impl<'a> NAPacket<'a> {
+    pub fn new(str: Rc<NAStream<'a>>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, kf: bool, vec: Vec<u8>) -> Self {
+//        let mut vec: Vec<u8> = Vec::new();
+//        vec.resize(size, 0);
+        NAPacket { stream: str, pts: pts, dts: dts, duration: dur, keyframe: kf, buffer: Rc::new(vec) }
+    }
+    pub fn get_stream(&self) -> Rc<NAStream<'a>> { self.stream.clone() }
+    pub fn get_pts(&self) -> Option<u64> { self.pts }
+    pub fn get_buffer(&self) -> Rc<Vec<u8>> { self.buffer.clone() }
+}
+
+impl<'a> fmt::Display for NAPacket<'a> {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut foo = format!("[pkt for {} size {}", self.stream, self.buffer.len());
+        if let Some(pts) = self.pts { foo = format!("{} pts {}", foo, pts); }
+        if let Some(dts) = self.dts { foo = format!("{} dts {}", foo, dts); }
+        if let Some(dur) = self.duration { foo = format!("{} duration {}", foo, dur); }
+        if self.keyframe { foo = format!("{} kf", foo); }
+        foo = foo + "]";
+        write!(f, "{}", foo)
+    }
+}
+
+#[derive(Debug)]
+#[allow(dead_code)]
+pub enum DemuxerError {
+    EOF,
+    NoSuchInput,
+    InvalidData,
+    IOError,
+    NotImplemented,
+    MemoryError,
+}
+
+type DemuxerResult<T> = Result<T, DemuxerError>;
+
+pub trait NADemuxer<'a> {
+    fn open(&mut self) -> DemuxerResult<()>;
+    fn get_frame(&mut self) -> DemuxerResult<NAPacket>;
+    fn seek(&mut self, time: u64) -> DemuxerResult<()>;
+}
+
+pub trait NAPacketReader<'a> {
+    fn read_packet(&mut self, str: Rc<NAStream<'a>>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, keyframe: bool, size: usize) -> DemuxerResult<NAPacket>;
+    fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()>;
+}
+
+impl<'a> NAPacketReader<'a> for ByteReader<'a> {
+    fn read_packet(&mut self, str: Rc<NAStream<'a>>, pts: Option<u64>, dts: Option<u64>, dur: Option<u64>, kf: bool, size: usize) -> DemuxerResult<NAPacket> {
+        let mut buf: Vec<u8> = Vec::with_capacity(size);
+        if buf.capacity() < size { return Err(DemuxerError::MemoryError); }
+        buf.resize(size, 0);
+        let res = self.read_buf(buf.as_mut_slice());
+        if let Err(_) = res { return Err(DemuxerError::IOError); }
+        if res.unwrap() < buf.len() { return Err(DemuxerError::IOError); }
+        let pkt = NAPacket::new(str, pts, dts, dur, kf, buf);
+        Ok(pkt)
+    }
+    fn fill_packet(&mut self, pkt: &mut NAPacket) -> DemuxerResult<()> {
+        let mut refbuf = pkt.get_buffer();
+        let mut buf = Rc::make_mut(&mut refbuf);
+        let res = self.read_buf(buf.as_mut_slice());
+        if let Err(_) = res { return Err(DemuxerError::IOError); }
+        if res.unwrap() < buf.len() { return Err(DemuxerError::IOError); }
+        Ok(())
+    }
+}
+
+pub struct NADemuxerBuilder {
+}
+
+impl From<ByteIOError> for DemuxerError {
+    fn from(_: ByteIOError) -> Self { DemuxerError::IOError }
+}
+
+impl NADemuxerBuilder {
+    #[allow(unused_variables)]
+    pub fn create_demuxer(name: &str, url: &str) -> DemuxerResult<Box<NADemuxer<'static>>> {
+        unimplemented!()
+    }
+}
diff --git a/src/frame.rs b/src/frame.rs
new file mode 100644
index 0000000..066a016
--- /dev/null
+++ b/src/frame.rs
@@ -0,0 +1,156 @@
+use std::collections::HashMap;
+
+#[allow(dead_code)]
+pub struct NASoniton {
+    bits:       u8,
+    is_be:      bool,
+    packed:     bool,
+    planar:     bool,
+    float:      bool,
+}
+
+#[allow(dead_code)]
+pub const SND_U8_FORMAT: NASoniton = NASoniton { bits: 8, is_be: false, packed: false, planar: false, float: false };
+#[allow(dead_code)]
+pub const SND_S16_FORMAT: NASoniton = NASoniton { bits: 16, is_be: false, packed: false, planar: false, float: false };
+
+#[allow(dead_code)]
+pub struct NAAudioInfo {
+    sample_rate: u32,
+    channels:    u8,
+    format:      NASoniton,
+    block_len:   usize,
+}
+
+impl NAAudioInfo {
+    pub fn new(sr: u32, ch: u8, fmt: NASoniton, bl: usize) -> Self {
+        NAAudioInfo { sample_rate: sr, channels: ch, format: fmt, block_len: bl }
+    }
+}
+
+#[derive(Debug)]
+pub enum ColorModel {
+    RGB,
+    YUV,
+    CMYK,
+    HSV,
+    LAB,
+}
+
+#[allow(dead_code)]
+pub struct NAPixelChromaton {
+    h_ss:           u8,
+    v_ss:           u8,
+    is_packed:      bool,
+    depth:          u8,
+    shift:          u8,
+    comp_offs:      u8,
+    next_elem:      u8,
+}
+
+#[allow(dead_code)]
+pub struct NAPixelFormaton {
+    model:      ColorModel,
+    components: u8,
+    comp_info:  [Option<NAPixelChromaton>; 5],
+    elem_size:  u8,
+    has_alpha:  bool,
+    is_palette: bool,
+}
+
+macro_rules! chromaton {
+    ($hs: expr, $vs: expr, $pck: expr, $d: expr, $sh: expr, $co: expr, $ne: expr) => ({
+        Some(NAPixelChromaton{ h_ss: $hs, v_ss: $vs, is_packed: $pck, depth: $d, shift: $sh, comp_offs: $co, next_elem: $ne })
+    });
+    (yuv8; $hs: expr, $vs: expr, $co: expr) => ({
+        Some(NAPixelChromaton{ h_ss: $hs, v_ss: $vs, is_packed: false, depth: 8, shift: 0, comp_offs: $co, next_elem: 1 })
+    });
+    (pal8; $co: expr) => ({
+        Some(NAPixelChromaton{ h_ss: 0, v_ss: 0, is_packed: true, depth: 8, shift: 0, comp_offs: $co, next_elem: 3 })
+    });
+}
+
+#[allow(dead_code)]
+pub const YUV420_FORMAT: NAPixelFormaton = NAPixelFormaton { model: ColorModel::YUV, components: 3,
+                                        comp_info: [
+                                            chromaton!(0, 0, false, 8, 0, 0, 1),
+                                            chromaton!(yuv8; 1, 1, 1),
+                                            chromaton!(yuv8; 1, 1, 2),
+                                            None, None],
+                                        elem_size: 0, has_alpha: false, is_palette: false };
+
+#[allow(dead_code)]
+pub const PAL8_FORMAT: NAPixelFormaton = NAPixelFormaton { model: ColorModel::RGB, components: 3,
+                                        comp_info: [
+                                            chromaton!(pal8; 0),
+                                            chromaton!(pal8; 1),
+                                            chromaton!(pal8; 2),
+                                            None, None],
+                                        elem_size: 1, has_alpha: false, is_palette: true };
+
+
+#[allow(dead_code)]
+pub struct NAVideoInfo {
+    width:      u32,
+    height:     u32,
+    flipped:    bool,
+    format:     NAPixelFormaton,
+}
+
+impl NAVideoInfo {
+    pub fn new(w: u32, h: u32, flip: bool, fmt: NAPixelFormaton) -> Self {
+        NAVideoInfo { width: w, height: h, flipped: flip, format: fmt }
+    }
+}
+
+pub enum NACodecTypeInfo {
+    None,
+    Audio(NAAudioInfo),
+    Video(NAVideoInfo),
+}
+
+#[allow(dead_code)]
+pub struct NABuffer<'a> {
+    id:   u64,
+    data: &'a mut [u8],
+}
+
+#[allow(dead_code)]
+pub struct NACodecInfo<'a> {
+    properties: NACodecTypeInfo,
+    extradata:  Option<&'a[u8]>,
+}
+
+impl<'a> NACodecInfo<'a> {
+    pub fn new(p: NACodecTypeInfo, edata: Option<&'a[u8]>) -> Self {
+        NACodecInfo { properties: p, extradata: edata }
+    }
+}
+
+pub trait NABufferAllocator {
+    fn alloc_buf(info: &NACodecInfo) -> NABuffer<'static>;
+}
+
+#[derive(Debug)]
+pub enum NAValue<'a> {
+    None,
+    Int(i32),
+    Long(i64),
+    String(String),
+    Data(&'a [u8]),
+}
+
+#[allow(dead_code)]
+pub struct NAFrame<'a> {
+    pts:            Option<u64>,
+    dts:            Option<u64>,
+    duration:       Option<u64>,
+    buffer:         &'a mut NABuffer<'a>,
+    info:           &'a NACodecInfo<'a>,
+    options:        HashMap<String, NAValue<'a>>,
+}
+
+#[allow(dead_code)]
+pub struct NACodecContext<'a> {
+    info:           &'a NACodecInfo<'a>,
+}
diff --git a/src/lib.rs b/src/lib.rs
index f039bdf..28f47d1 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,2 +1,4 @@
+pub mod demuxers;
+pub mod frame;
 pub mod io;