more utility code

[nihav.git] / src / codecs / indeo2.rs

use io::bitreader::*;
use io::codebook::*;
use formats;
use super::*;

static INDEO2_DELTA_TABLE: [[u8; 256]; 4] = [
    [
      0x80, 0x80, 0x84, 0x84, 0x7C, 0x7C, 0x7F, 0x85,
      0x81, 0x7B, 0x85, 0x7F, 0x7B, 0x81, 0x8C, 0x8C,
      0x74, 0x74, 0x83, 0x8D, 0x7D, 0x73, 0x8D, 0x83,
      0x73, 0x7D, 0x77, 0x89, 0x89, 0x77, 0x89, 0x77,
      0x77, 0x89, 0x8C, 0x95, 0x74, 0x6B, 0x95, 0x8C,
      0x6B, 0x74, 0x7C, 0x90, 0x84, 0x70, 0x90, 0x7C,
      0x70, 0x84, 0x96, 0x96, 0x6A, 0x6A, 0x82, 0x98,
      0x7E, 0x68, 0x98, 0x82, 0x68, 0x7E, 0x97, 0xA2,
      0x69, 0x5E, 0xA2, 0x97, 0x5E, 0x69, 0xA2, 0xA2,
      0x5E, 0x5E, 0x8B, 0xA3, 0x75, 0x5D, 0xA3, 0x8B,
      0x5D, 0x75, 0x71, 0x95, 0x8F, 0x6B, 0x95, 0x71,
      0x6B, 0x8F, 0x78, 0x9D, 0x88, 0x63, 0x9D, 0x78,
      0x63, 0x88, 0x7F, 0xA7, 0x81, 0x59, 0xA7, 0x7F,
      0x59, 0x81, 0xA4, 0xB1, 0x5C, 0x4F, 0xB1, 0xA4,
      0x4F, 0x5C, 0x96, 0xB1, 0x6A, 0x4F, 0xB1, 0x96,
      0x4F, 0x6A, 0xB2, 0xB2, 0x4E, 0x4E, 0x65, 0x9B,
      0x9B, 0x65, 0x9B, 0x65, 0x65, 0x9B, 0x89, 0xB4,
      0x77, 0x4C, 0xB4, 0x89, 0x4C, 0x77, 0x6A, 0xA3,
      0x96, 0x5D, 0xA3, 0x6A, 0x5D, 0x96, 0x73, 0xAC,
      0x8D, 0x54, 0xAC, 0x73, 0x54, 0x8D, 0xB4, 0xC3,
      0x4C, 0x3D, 0xC3, 0xB4, 0x3D, 0x4C, 0xA4, 0xC3,
      0x5C, 0x3D, 0xC3, 0xA4, 0x3D, 0x5C, 0xC4, 0xC4,
      0x3C, 0x3C, 0x96, 0xC6, 0x6A, 0x3A, 0xC6, 0x96,
      0x3A, 0x6A, 0x7C, 0xBA, 0x84, 0x46, 0xBA, 0x7C,
      0x46, 0x84, 0x5B, 0xAB, 0xA5, 0x55, 0xAB, 0x5B,
      0x55, 0xA5, 0x63, 0xB4, 0x9D, 0x4C, 0xB4, 0x63,
      0x4C, 0x9D, 0x86, 0xCA, 0x7A, 0x36, 0xCA, 0x86,
      0x36, 0x7A, 0xB6, 0xD7, 0x4A, 0x29, 0xD7, 0xB6,
      0x29, 0x4A, 0xC8, 0xD7, 0x38, 0x29, 0xD7, 0xC8,
      0x29, 0x38, 0xA4, 0xD8, 0x5C, 0x28, 0xD8, 0xA4,
      0x28, 0x5C, 0x6C, 0xC1, 0x94, 0x3F, 0xC1, 0x6C,
      0x3F, 0x94, 0xD9, 0xD9, 0x27, 0x27, 0x80, 0x80,
   ], [
      0x80, 0x80, 0x85, 0x85, 0x7B, 0x7B, 0x7E, 0x87,
      0x82, 0x79, 0x87, 0x7E, 0x79, 0x82, 0x8F, 0x8F,
      0x71, 0x71, 0x84, 0x8F, 0x7C, 0x71, 0x8F, 0x84,
      0x71, 0x7C, 0x75, 0x8B, 0x8B, 0x75, 0x8B, 0x75,
      0x75, 0x8B, 0x8E, 0x9A, 0x72, 0x66, 0x9A, 0x8E,
      0x66, 0x72, 0x7B, 0x93, 0x85, 0x6D, 0x93, 0x7B,
      0x6D, 0x85, 0x9B, 0x9B, 0x65, 0x65, 0x82, 0x9D,
      0x7E, 0x63, 0x9D, 0x82, 0x63, 0x7E, 0x9B, 0xA8,
      0x65, 0x58, 0xA8, 0x9B, 0x58, 0x65, 0xA9, 0xA9,
      0x57, 0x57, 0x8D, 0xAA, 0x73, 0x56, 0xAA, 0x8D,
      0x56, 0x73, 0x6E, 0x99, 0x92, 0x67, 0x99, 0x6E,
      0x67, 0x92, 0x76, 0xA2, 0x8A, 0x5E, 0xA2, 0x76,
      0x5E, 0x8A, 0x7F, 0xAF, 0x81, 0x51, 0xAF, 0x7F,
      0x51, 0x81, 0xAB, 0xBA, 0x55, 0x46, 0xBA, 0xAB,
      0x46, 0x55, 0x9A, 0xBB, 0x66, 0x45, 0xBB, 0x9A,
      0x45, 0x66, 0xBB, 0xBB, 0x45, 0x45, 0x60, 0xA0,
      0xA0, 0x60, 0xA0, 0x60, 0x60, 0xA0, 0x8B, 0xBE,
      0x75, 0x42, 0xBE, 0x8B, 0x42, 0x75, 0x66, 0xAA,
      0x9A, 0x56, 0xAA, 0x66, 0x56, 0x9A, 0x70, 0xB5,
      0x90, 0x4B, 0xB5, 0x70, 0x4B, 0x90, 0xBE, 0xCF,
      0x42, 0x31, 0xCF, 0xBE, 0x31, 0x42, 0xAB, 0xD0,
      0x55, 0x30, 0xD0, 0xAB, 0x30, 0x55, 0xD1, 0xD1,
      0x2F, 0x2F, 0x9A, 0xD3, 0x66, 0x2D, 0xD3, 0x9A,
      0x2D, 0x66, 0x7B, 0xC5, 0x85, 0x3B, 0xC5, 0x7B,
      0x3B, 0x85, 0x54, 0xB4, 0xAC, 0x4C, 0xB4, 0x54,
      0x4C, 0xAC, 0x5E, 0xBE, 0xA2, 0x42, 0xBE, 0x5E,
      0x42, 0xA2, 0x87, 0xD8, 0x79, 0x28, 0xD8, 0x87,
      0x28, 0x79, 0xC0, 0xE8, 0x40, 0x18, 0xE8, 0xC0,
      0x18, 0x40, 0xD5, 0xE8, 0x2B, 0x18, 0xE8, 0xD5,
      0x18, 0x2B, 0xAB, 0xE9, 0x55, 0x17, 0xE9, 0xAB,
      0x17, 0x55, 0x68, 0xCD, 0x98, 0x33, 0xCD, 0x68,
      0x33, 0x98, 0xEA, 0xEA, 0x16, 0x16, 0x80, 0x80,
    ], [
      0x80, 0x80, 0x86, 0x86, 0x7A, 0x7A, 0x7E, 0x88,
      0x82, 0x78, 0x88, 0x7E, 0x78, 0x82, 0x92, 0x92,
      0x6E, 0x6E, 0x85, 0x92, 0x7B, 0x6E, 0x92, 0x85,
      0x6E, 0x7B, 0x73, 0x8D, 0x8D, 0x73, 0x8D, 0x73,
      0x73, 0x8D, 0x91, 0x9E, 0x6F, 0x62, 0x9E, 0x91,
      0x62, 0x6F, 0x79, 0x97, 0x87, 0x69, 0x97, 0x79,
      0x69, 0x87, 0xA0, 0xA0, 0x60, 0x60, 0x83, 0xA2,
      0x7D, 0x5E, 0xA2, 0x83, 0x5E, 0x7D, 0xA0, 0xB0,
      0x60, 0x50, 0xB0, 0xA0, 0x50, 0x60, 0xB1, 0xB1,
      0x4F, 0x4F, 0x8F, 0xB2, 0x71, 0x4E, 0xB2, 0x8F,
      0x4E, 0x71, 0x6B, 0x9E, 0x95, 0x62, 0x9E, 0x6B,
      0x62, 0x95, 0x74, 0xA9, 0x8C, 0x57, 0xA9, 0x74,
      0x57, 0x8C, 0x7F, 0xB8, 0x81, 0x48, 0xB8, 0x7F,
      0x48, 0x81, 0xB4, 0xC5, 0x4C, 0x3B, 0xC5, 0xB4,
      0x3B, 0x4C, 0x9F, 0xC6, 0x61, 0x3A, 0xC6, 0x9F,
      0x3A, 0x61, 0xC6, 0xC6, 0x3A, 0x3A, 0x59, 0xA7,
      0xA7, 0x59, 0xA7, 0x59, 0x59, 0xA7, 0x8D, 0xCA,
      0x73, 0x36, 0xCA, 0x8D, 0x36, 0x73, 0x61, 0xB2,
      0x9F, 0x4E, 0xB2, 0x61, 0x4E, 0x9F, 0x6D, 0xBF,
      0x93, 0x41, 0xBF, 0x6D, 0x41, 0x93, 0xCA, 0xDF,
      0x36, 0x21, 0xDF, 0xCA, 0x21, 0x36, 0xB3, 0xDF,
      0x4D, 0x21, 0xDF, 0xB3, 0x21, 0x4D, 0xE1, 0xE1,
      0x1F, 0x1F, 0x9F, 0xE3, 0x61, 0x1D, 0xE3, 0x9F,
      0x1D, 0x61, 0x7A, 0xD3, 0x86, 0x2D, 0xD3, 0x7A,
      0x2D, 0x86, 0x4C, 0xBE, 0xB4, 0x42, 0xBE, 0x4C,
      0x42, 0xB4, 0x57, 0xCA, 0xA9, 0x36, 0xCA, 0x57,
      0x36, 0xA9, 0x88, 0xE9, 0x78, 0x17, 0xE9, 0x88,
      0x17, 0x78, 0xCC, 0xFB, 0x34, 0x05, 0xFB, 0xCC,
      0x05, 0x34, 0xE6, 0xFB, 0x1A, 0x05, 0xFB, 0xE6,
      0x05, 0x1A, 0xB4, 0xFD, 0x4C, 0x03, 0xFD, 0xB4,
      0x03, 0x4C, 0x63, 0xDC, 0x9D, 0x24, 0xDC, 0x63,
      0x24, 0x9D, 0xFE, 0xFE, 0x02, 0x02, 0x80, 0x80,
    ], [
      0x80, 0x80, 0x87, 0x87, 0x79, 0x79, 0x7E, 0x89,
      0x82, 0x77, 0x89, 0x7E, 0x77, 0x82, 0x95, 0x95,
      0x6B, 0x6B, 0x86, 0x96, 0x7A, 0x6A, 0x96, 0x86,
      0x6A, 0x7A, 0x70, 0x90, 0x90, 0x70, 0x90, 0x70,
      0x70, 0x90, 0x94, 0xA4, 0x6C, 0x5C, 0xA4, 0x94,
      0x5C, 0x6C, 0x78, 0x9B, 0x88, 0x65, 0x9B, 0x78,
      0x65, 0x88, 0xA6, 0xA6, 0x5A, 0x5A, 0x83, 0xA9,
      0x7D, 0x57, 0xA9, 0x83, 0x57, 0x7D, 0xA6, 0xB9,
      0x5A, 0x47, 0xB9, 0xA6, 0x47, 0x5A, 0xBA, 0xBA,
      0x46, 0x46, 0x92, 0xBC, 0x6E, 0x44, 0xBC, 0x92,
      0x44, 0x6E, 0x67, 0xA3, 0x99, 0x5D, 0xA3, 0x67,
      0x5D, 0x99, 0x72, 0xB0, 0x8E, 0x50, 0xB0, 0x72,
      0x50, 0x8E, 0x7F, 0xC3, 0x81, 0x3D, 0xC3, 0x7F,
      0x3D, 0x81, 0xBE, 0xD2, 0x42, 0x2E, 0xD2, 0xBE,
      0x2E, 0x42, 0xA5, 0xD4, 0x5B, 0x2C, 0xD4, 0xA5,
      0x2C, 0x5B, 0xD4, 0xD4, 0x2C, 0x2C, 0x52, 0xAE,
      0xAE, 0x52, 0xAE, 0x52, 0x52, 0xAE, 0x8F, 0xD8,
      0x71, 0x28, 0xD8, 0x8F, 0x28, 0x71, 0x5B, 0xBB,
      0xA5, 0x45, 0xBB, 0x5B, 0x45, 0xA5, 0x69, 0xCB,
      0x97, 0x35, 0xCB, 0x69, 0x35, 0x97, 0xD8, 0xF0,
      0x28, 0x10, 0xF0, 0xD8, 0x10, 0x28, 0xBD, 0xF1,
      0x43, 0x0F, 0xF1, 0xBD, 0x0F, 0x43, 0xF3, 0xF3,
      0x0D, 0x0D, 0xA5, 0xF6, 0x5B, 0x0A, 0xF6, 0xA5,
      0x0A, 0x5B, 0x78, 0xE2, 0x88, 0x1E, 0xE2, 0x78,
      0x1E, 0x88, 0x42, 0xC9, 0xBE, 0x37, 0xC9, 0x42,
      0x37, 0xBE, 0x4F, 0xD8, 0xB1, 0x28, 0xD8, 0x4F,
      0x28, 0xB1, 0x8A, 0xFD, 0x76, 0x03, 0xFD, 0x8A,
      0x03, 0x76, 0xDB, 0xFF, 0x25, 0x01, 0xFF, 0xDB,
      0x01, 0x25, 0xF9, 0xFF, 0x07, 0x01, 0xFF, 0xF9,
      0x01, 0x07, 0xBE, 0xFF, 0x42, 0x01, 0xFF, 0xBE,
      0x01, 0x42, 0x5E, 0xED, 0xA2, 0x13, 0xED, 0x5E,
      0x13, 0xA2, 0xFF, 0xFF, 0x01, 0x01, 0x80, 0x80,
    ]
];

static INDEO2_CODE_CODES: &[u16] = &[
    0x0000, 0x0004, 0x0006, 0x0001, 0x0009, 0x0019, 0x000D, 0x001D,
    0x0023, 0x0013, 0x0033, 0x000B, 0x002B, 0x001B, 0x0007, 0x0087,
    0x0027, 0x00A7, 0x0067, 0x00E7, 0x0097, 0x0057, 0x0037, 0x00B7,
    0x00F7, 0x000F, 0x008F, 0x018F, 0x014F, 0x00CF, 0x002F, 0x012F,
    0x01AF, 0x006F, 0x00EF, 0x01EF, 0x001F, 0x021F, 0x011F, 0x031F,
    0x009F, 0x029F, 0x019F, 0x039F, 0x005F, 0x025F, 0x015F, 0x035F,
    0x00DF, 0x02DF, 0x01DF, 0x03DF, 0x003F, 0x103F, 0x083F, 0x183F,
    0x043F, 0x143F, 0x0C3F, 0x1C3F, 0x023F, 0x123F, 0x0A3F, 0x1A3F,
    0x063F, 0x163F, 0x0E3F, 0x1E3F, 0x013F, 0x113F, 0x093F, 0x193F,
    0x053F, 0x153F, 0x0D3F, 0x1D3F, 0x033F, 0x133F, 0x0B3F, 0x1B3F,
    0x073F, 0x173F, 0x0F3F, 0x1F3F, 0x00BF, 0x10BF, 0x08BF, 0x18BF,
    0x04BF, 0x14BF, 0x0CBF, 0x1CBF, 0x02BF, 0x12BF, 0x0ABF, 0x1ABF,
    0x06BF, 0x16BF, 0x0EBF, 0x1EBF, 0x01BF, 0x11BF, 0x09BF, 0x19BF,
    0x05BF, 0x15BF, 0x0DBF, 0x1DBF, 0x03BF, 0x13BF, 0x0BBF, 0x1BBF,
    0x07BF, 0x17BF, 0x0FBF, 0x1FBF, 0x007F, 0x207F, 0x107F, 0x307F,
    0x087F, 0x287F, 0x187F, 0x387F, 0x047F, 0x247F, 0x147F, 0x0002,
    0x0011, 0x0005, 0x0015, 0x0003, 0x003B, 0x0047, 0x00C7, 0x0017,
    0x00D7, 0x0077, 0x010F, 0x004F, 0x01CF, 0x00AF, 0x016F
];

static INDEO2_CODE_LENGTHS: &[u8] = &[
     3,  3,  3,  5,  5,  5,  5,  5,  6,  6,  6,  6,  6,  6,  8,  8,
     8,  8,  8,  8,  8,  8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,
     9,  9,  9,  9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
    10, 10, 10, 10, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
    13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13,
    13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14,  3,
     5,  5,  5,  6,  6,  8,  8,  8,  8,  8,  9,  9,  9,  9,  9
];

struct IR2CodeReader { }

impl CodebookDescReader<u8> for IR2CodeReader {
    fn bits(&mut self, idx: usize) -> u8  { INDEO2_CODE_LENGTHS[idx] }
    fn code(&mut self, idx: usize) -> u32 { INDEO2_CODE_CODES[idx] as u32 }
    fn sym (&mut self, idx: usize) -> u8 {
        if idx < 0x7F { (idx + 1) as u8 } else { (idx + 2) as u8 }
    }
    fn len(&mut self) -> usize { INDEO2_CODE_LENGTHS.len() }
}

struct Indeo2Decoder {
    info:    Rc<NACodecInfo>,
    cb:      Codebook<u8>,
    frmmgr:  HAMShuffler,
}

impl Indeo2Decoder {
    fn new() -> Self {
        let dummy_info = Rc::new(DUMMY_CODEC_INFO);
        let mut coderead = IR2CodeReader{};
        let cb = Codebook::new(&mut coderead, CodebookMode::LSB).unwrap();
        Indeo2Decoder { info: dummy_info, cb: cb, frmmgr: HAMShuffler::new() }
    }

    fn decode_plane_intra(&self, br: &mut BitReader,
                          frm: &mut NAFrame, planeno: usize,
                          tableno: usize) -> DecoderResult<()> {
        let offs = frm.get_offset(planeno);
        let (w, h) = frm.get_dimensions(planeno);
        let stride = frm.get_stride(planeno);
        let cb = &self.cb;

        let mut buffer = frm.get_buffer_mut();
        let mut data = buffer.get_data_mut();
        let mut framebuf: &mut [u8] = data.as_mut_slice();

        let table = &INDEO2_DELTA_TABLE[tableno];

        let mut base = offs;
        let mut x: usize = 0;
        while x < w {
            let idx = br.read_cb(cb)? as usize;
            if idx >= 0x80 {
                let run = (idx - 0x80) * 2;
                if x + run > w { return Err(DecoderError::InvalidData); }
                for i in 0..run {
                    framebuf[base + x + i] = 0x80;
                }
                x += run;
            } else {
                framebuf[base + x + 0] = table[(idx * 2 + 0) as usize];
                framebuf[base + x + 1] = table[(idx * 2 + 1) as usize];
                x += 2;
            }
        }
        base += stride;
        for _ in 1..h {
            let mut x: usize = 0;
            while x < w {
                let idx = br.read_cb(cb)? as usize;
                if idx >= 0x80 {
                    let run = (idx - 0x80) * 2;
                    if x + run > w { return Err(DecoderError::InvalidData); }
                    for i in 0..run {
                        framebuf[base + x + i] = framebuf[base + x + i - stride];
                    }
                    x += run;
                } else {
                    let delta0 = (table[idx * 2 + 0] as i16) - 0x80;
                    let delta1 = (table[idx * 2 + 1] as i16) - 0x80;
                    let mut pix0 = framebuf[base + x + 0 - stride] as i16;
                    let mut pix1 = framebuf[base + x + 1 - stride] as i16;
                    pix0 += delta0;
                    pix1 += delta1;
                    if pix0 < 0 { pix0 = 0; }
                    if pix1 < 0 { pix1 = 0; }
                    if pix0 > 255 { pix0 = 255; }
                    if pix1 > 255 { pix1 = 255; }
                    framebuf[base + x + 0] = pix0 as u8;
                    framebuf[base + x + 1] = pix1 as u8;
                    x += 2;
                }
            }
            base += stride;
        }
        Ok(())
    }

    fn decode_plane_inter(&self, br: &mut BitReader,
                          frm: &mut NAFrame, planeno: usize,
                          tableno: usize) -> DecoderResult<()> {
        let offs = frm.get_offset(planeno);
        let (w, h) = frm.get_dimensions(planeno);
        let stride = frm.get_stride(planeno);
        let cb = &self.cb;

        let mut buffer = frm.get_buffer_mut();
        let mut data = buffer.get_data_mut();
        let mut framebuf: &mut [u8] = data.as_mut_slice();

        let table = &INDEO2_DELTA_TABLE[tableno];

        let mut base = offs;
        for _ in 0..h {
            let mut x: usize = 0;
            while x < w {
                let idx = br.read_cb(cb)? as usize;
                if idx >= 0x80 {
                    let run = (idx - 0x80) * 2;
                    if x + run > w { return Err(DecoderError::InvalidData); }
                    x += run;
                } else {
                    let delta0 = (table[idx * 2 + 0] as i16) - 0x80;
                    let delta1 = (table[idx * 2 + 1] as i16) - 0x80;
                    let mut pix0 = framebuf[base + x + 0] as i16;
                    let mut pix1 = framebuf[base + x + 1] as i16;
                    pix0 += delta0 * 3 >> 2;
                    pix1 += delta1 * 3 >> 2;
                    if pix0 < 0 { pix0 = 0; }
                    if pix1 < 0 { pix1 = 0; }
                    if pix0 > 255 { pix0 = 255; }
                    if pix1 > 255 { pix1 = 255; }
                    framebuf[base + x + 0] = pix0 as u8;
                    framebuf[base + x + 1] = pix1 as u8;
                    x += 2;
                }
            }
            base += stride;
        }
        Ok(())
    }
}

const IR2_START: usize = 48;

impl NADecoder for Indeo2Decoder {
    #[allow(unused_variables)]
    fn init(&mut self, info: Rc<NACodecInfo>) -> DecoderResult<()> {
        if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
            let w = vinfo.get_width();
            let h = vinfo.get_height();
            let f = vinfo.is_flipped();
            let fmt = formats::YUV410_FORMAT;
            let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, f, fmt));
            self.info = Rc::new(NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()));
            self.frmmgr.clear();
            Ok(())
        } else {
            Err(DecoderError::InvalidData)
        }
    }
    fn decode(&mut self, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
        let src = pkt.get_buffer();
        if src.len() <= IR2_START { return Err(DecoderError::ShortData); }
        let interframe = src[18];
        let tabs = src[34];
        let mut br = BitReader::new(&src[IR2_START..], src.len() - IR2_START, BitReaderMode::LE);
        let luma_tab = tabs & 3;
        let chroma_tab = (tabs >> 2) & 3;
        if interframe != 0 {
            let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone());
            frm.set_keyframe(true);
            frm.set_frame_type(FrameType::I);
            for plane in 0..3 {
                let tabidx = (if plane == 0 { luma_tab } else { chroma_tab }) as usize;
                self.decode_plane_intra(&mut br, &mut frm, plane, tabidx)?;
            }
            self.frmmgr.add_frame(frm);
        } else {
            let frmref = self.frmmgr.clone_ref();
            if let None = frmref { return Err(DecoderError::MissingReference); }
            let ffrmref = frmref.unwrap();
            let mut frm = ffrmref.borrow_mut();
            frm.set_keyframe(false);
            frm.set_frame_type(FrameType::P);
            frm.fill_timestamps(pkt);
            for plane in 0..3 {
                let tabidx = (if plane == 0 { luma_tab } else { chroma_tab }) as usize;
                self.decode_plane_inter(&mut br, &mut frm, plane, tabidx)?;
            }
        }
        Ok(self.frmmgr.get_output_frame().unwrap())
    }
}

pub fn get_decoder() -> Box<NADecoder> {
    Box::new(Indeo2Decoder::new())
}

#[cfg(test)]
mod test {
    use codecs;
    use demuxers::*;
    use frame::NAFrameRef;
    use io::byteio::*;
    use std::fs::File;
    use std::io::prelude::*;

    #[test]
    fn test_indeo2() {
        let avi_dmx = find_demuxer("avi").unwrap();
        let mut file = File::open("assets/laser05.avi").unwrap();
        let mut fr = FileReader::new_read(&mut file);
        let mut br = ByteReader::new(&mut fr);
        let mut dmx = avi_dmx.new_demuxer(&mut br);
        dmx.open().unwrap();
        let mut dec = (codecs::find_decoder("indeo2").unwrap())();//Indeo2Decoder::new();

        let mut str: u32 = 42;
        for i in 0..dmx.get_num_streams() {
            let s = dmx.get_stream(i).unwrap();
            let info = s.get_info();
            if info.is_video() && info.get_name() == "indeo2" {
                str = s.get_id();
                dec.init(s.get_info()).unwrap();
                break;
            }
        }

        loop {
            let pktres = dmx.get_frame();
            if let Err(e) = pktres {
                if e == DemuxerError::EOF { break; }
                panic!("error");
            }
            let pkt = pktres.unwrap();
            if pkt.get_stream().get_id() == str {
                let frm = dec.decode(&pkt).unwrap();
                write_pgmyuv(pkt.get_pts().unwrap(), frm);
            }
        }
    }

    fn write_pgmyuv(num: u64, frmref: NAFrameRef) {
        let frm = frmref.borrow();
        let name = format!("assets/out{:04}.pgm", num);
        let mut ofile = File::create(name).unwrap();
        let (w, h) = frm.get_dimensions(0);
        let (w2, h2) = frm.get_dimensions(1);
        let tot_h = h + h2;
        let hdr = format!("P5\n{} {}\n255\n", w, tot_h);
        ofile.write_all(hdr.as_bytes()).unwrap();
        let buf = frm.get_buffer();
        let dta = buf.get_data();
        let ls = frm.get_stride(0);
        let mut idx = 0;
        let mut idx2 = ls;
        let mut pad: Vec<u8> = Vec::with_capacity((w - w2 * 2) / 2);
        pad.resize((w - w2 * 2) / 2, 0xFF);
        for _ in 0..h {
            let line = &dta[idx..idx2];
            ofile.write_all(line).unwrap();
            idx  += ls;
            idx2 += ls;
        }
        let mut base1 = frm.get_offset(1);
        let stride1 = frm.get_stride(1);
        let mut base2 = frm.get_offset(2);
        let stride2 = frm.get_stride(2);
        for _ in 0..h2 {
            let bend1 = base1 + w2;
            let line = &dta[base1..bend1];
            ofile.write_all(line).unwrap();
            ofile.write_all(pad.as_slice()).unwrap();

            let bend2 = base2 + w2;
            let line = &dta[base2..bend2];
            ofile.write_all(line).unwrap();
            ofile.write_all(pad.as_slice()).unwrap();

            base1 += stride1;
            base2 += stride2;
        }
    }
}