--- /dev/null
+use nihav_core::io::bitreader::*;
+use nihav_core::io::codebook::*;
+use nihav_core::formats;
+use nihav_core::frame::*;
+use nihav_core::codecs::*;
+use nihav_codec_support::codecs::{MV, ZIGZAG};
+use nihav_codec_support::codecs::h263::*;
+use nihav_codec_support::codecs::h263::code::*;
+use nihav_codec_support::codecs::h263::decoder::*;
+use nihav_codec_support::codecs::h263::data::*;
+
+#[allow(dead_code)]
+struct Tables {
+ intra_mcbpc_cb: Codebook<u8>,
+ inter_mcbpc_cb: Codebook<u8>,
+ cbpy_cb: Codebook<u8>,
+ rl_cb: Codebook<H263RLSym>,
+ aic_rl_cb: Codebook<H263RLSym>,
+ mv_cb: Codebook<u8>,
+}
+
+struct SparkDecoder {
+ info: NACodecInfoRef,
+ dec: H263BaseDecoder,
+ tables: Tables,
+ w: usize,
+ h: usize,
+ bdsp: H263BlockDSP,
+}
+
+struct SparkBR<'a> {
+ br: BitReader<'a>,
+ tables: &'a Tables,
+ ver1: bool,
+ mb_w: usize,
+ mb_h: usize,
+}
+
+fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
+ let code = i16::from(br.read_cb(mv_cb)?);
+ if code == 0 { return Ok(0) }
+ if !br.read_bool()? {
+ Ok(code)
+ } else {
+ Ok(-code)
+ }
+}
+
+fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
+ let xval = decode_mv_component(br, mv_cb)?;
+ let yval = decode_mv_component(br, mv_cb)?;
+ Ok(MV::new(xval, yval))
+}
+
+impl<'a> SparkBR<'a> {
+ fn new(src: &'a [u8], tables: &'a Tables, w: usize, h: usize) -> Self {
+ Self {
+ br: BitReader::new(src, BitReaderMode::BE),
+ tables,
+ ver1: false,
+ mb_w: (w + 15) >> 4,
+ mb_h: (h + 15) >> 4,
+ }
+ }
+
+ fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
+ let br = &mut self.br;
+ let mut idx = 0;
+ if intra {
+ let mut dc = br.read(8)?;
+ if dc == 255 { dc = 128; }
+ blk[0] = (dc as i16) << 3;
+ idx = 1;
+ }
+ if !coded { return Ok(()); }
+
+ let rl_cb = &self.tables.rl_cb; // could be aic too
+ let q_add = if quant == 0 { 0i16 } else { i16::from((quant - 1) | 1) };
+ let q = i16::from(quant * 2);
+ while idx < 64 {
+ let code = br.read_cb(rl_cb)?;
+ let run;
+ let mut level;
+ let last;
+ if !code.is_escape() {
+ run = code.get_run();
+ level = code.get_level();
+ last = code.is_last();
+ if br.read_bool()? { level = -level; }
+ if level > 0 {
+ level = (level * q) + q_add;
+ } else {
+ level = (level * q) - q_add;
+ }
+ } else if !self.ver1 {
+ last = br.read_bool()?;
+ run = br.read(6)? as u8;
+ level = br.read_s(8)? as i16;
+ if level == -128 {
+ let low = br.read(5)? as i16;
+ let top = br.read_s(6)? as i16;
+ level = (top << 5) | low;
+ }
+ if level > 0 {
+ level = (level * q) + q_add;
+ } else {
+ level = (level * q) - q_add;
+ }
+ if level < -2048 { level = -2048; }
+ if level > 2047 { level = 2047; }
+ } else {
+ let fmt_bit = br.read_bool()?;
+ last = br.read_bool()?;
+ run = br.read(6)? as u8;
+ level = br.read_s(if !fmt_bit { 7 } else { 11 })? as i16;
+ validate!(level != 0);
+ if !fmt_bit {
+ validate!(level != 64);
+ } else {
+ validate!(level != 1024);
+ }
+ if level > 0 {
+ level = (level * q) + q_add;
+ } else {
+ level = (level * q) - q_add;
+ }
+ if level < -2048 { level = -2048; }
+ if level > 2047 { level = 2047; }
+ }
+ idx += run;
+ validate!(idx < 64);
+ let oidx = ZIGZAG[idx as usize];
+ blk[oidx] = level;
+ idx += 1;
+ if last { break; }
+ }
+ Ok(())
+ }
+}
+
+
+impl<'a> BlockDecoder for SparkBR<'a> {
+ fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
+ let br = &mut self.br;
+ let syncw = br.read(17)?;
+ validate!(syncw == 1);
+ let version = br.read(5)?;
+ validate!(version == 0 || version == 1);
+ self.ver1 = version == 1;
+ let tr = (br.read(8)? << 8) as u16;
+ let sfmt = br.read(3)?;
+ validate!(sfmt != 0b111);
+ let (w, h) = match sfmt {
+ 0 => {
+ let w = br.read(8)? as usize;
+ let h = br.read(8)? as usize;
+ validate!(w != 0 && h != 0);
+ (w, h)
+ },
+ 1 => {
+ let w = br.read(16)? as usize;
+ let h = br.read(16)? as usize;
+ validate!(w != 0 && h != 0);
+ (w, h)
+ },
+ 2 => (352, 288),
+ 3 => (176, 144),
+ 4 => (128, 96),
+ 5 => (320, 240),
+ 6 => (160, 120),
+ _ => unreachable!(),
+ };
+ let pic_type = br.read(2)?;
+ let ftype = match pic_type {
+ 0 => Type::I,
+ 1 => Type::P,
+ 2 => Type::Special,
+ _ => return Err(DecoderError::InvalidData),
+ };
+ let deblock = br.read_bool()?;
+ let quant = br.read(5)?;
+ while br.read_bool()? { // skip PEI
+ br.read(8)?;
+ }
+ self.mb_w = (w + 15) >> 4;
+ self.mb_h = (h + 15) >> 4;
+
+ let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
+ let picinfo = PicInfo::new(w, h, ftype, MVMode::Long, true, false, quant as u8, tr, None, plusinfo);
+ Ok(picinfo)
+ }
+ fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
+ Ok(SliceInfo::new(0, 0, self.mb_w * self.mb_h, info.quant))
+ }
+ fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, _sstate: &SliceState) -> DecoderResult<BlockInfo> {
+ let br = &mut self.br;
+ let mut q = slice.get_quant();
+ match info.get_mode() {
+ Type::I => {
+ let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
+ while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
+ let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
+ let cbp = (cbpy << 2) | (cbpc & 3);
+ let dquant = (cbpc & 4) != 0;
+ if dquant {
+ let idx = br.read(2)? as usize;
+ q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
+ }
+ Ok(BlockInfo::new(Type::I, cbp, q))
+ },
+ Type::P | Type::Special => {
+ if br.read_bool()? {
+ return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
+ }
+ let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
+ while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
+ let is_intra = (cbpc & 0x04) != 0;
+ let dquant = (cbpc & 0x08) != 0;
+ let is_4x4 = (cbpc & 0x10) != 0;
+ if is_intra {
+ let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
+ let cbp = (cbpy << 2) | (cbpc & 3);
+ if dquant {
+ let idx = br.read(2)? as usize;
+ q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
+ validate!(q < 32);
+ }
+ let binfo = BlockInfo::new(Type::I, cbp, q);
+ return Ok(binfo);
+ }
+
+ let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
+// if /* !aiv && */(cbpc & 3) != 3 {
+ cbpy ^= 0xF;
+// }
+ let cbp = (cbpy << 2) | (cbpc & 3);
+ if dquant {
+ let idx = br.read(2)? as usize;
+ q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
+ validate!(q < 32);
+ }
+ let mut binfo = BlockInfo::new(Type::P, cbp, q);
+ if !is_4x4 {
+ let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
+ binfo.set_mv(&mvec);
+ } else {
+ let mvec: [MV; 4] = [
+ decode_mv(br, &self.tables.mv_cb)?,
+ decode_mv(br, &self.tables.mv_cb)?,
+ decode_mv(br, &self.tables.mv_cb)?,
+ decode_mv(br, &self.tables.mv_cb)?
+ ];
+ binfo.set_mv(&mvec);
+ }
+ Ok(binfo)
+ },
+ _ => { Err(DecoderError::InvalidData) },
+ }
+ }
+ fn decode_block_intra(&mut self, _info: &BlockInfo, _sstate: &SliceState, quant: u8, _no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
+ self.decode_block(quant, true, coded, blk)
+ }
+ fn decode_block_inter(&mut self, _info: &BlockInfo, _sstate: &SliceState, quant: u8, _no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
+ self.decode_block(quant, false, coded, blk)
+ }
+ fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
+}
+
+impl SparkDecoder {
+ fn new() -> Self {
+ let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
+ let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
+ let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let mut coderead = H263ShortCodeReader::new(H263_CBPY);
+ let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
+ let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
+ let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let mut coderead = H263ShortCodeReader::new(H263_MV);
+ let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
+ let tables = Tables {
+ intra_mcbpc_cb,
+ inter_mcbpc_cb,
+ cbpy_cb,
+ rl_cb,
+ aic_rl_cb,
+ mv_cb,
+ };
+
+ Self {
+ info: NACodecInfo::new_dummy(),
+ dec: H263BaseDecoder::new(true),
+ tables,
+ bdsp: H263BlockDSP::new(),
+ w: 0,
+ h: 0,
+ }
+ }
+}
+
+impl NADecoder for SparkDecoder {
+ fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
+ if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
+ let w = vinfo.get_width();
+ let h = vinfo.get_height();
+ let fmt = formats::YUV420_FORMAT;
+ let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
+ self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
+ self.w = w;
+ self.h = h;
+
+ Ok(())
+ } else {
+ Err(DecoderError::InvalidData)
+ }
+ }
+ fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
+ let src = pkt.get_buffer();
+
+ let mut ibr = SparkBR::new(&src, &self.tables, self.w, self.h);
+ let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
+
+ let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
+ frm.set_keyframe(self.dec.is_intra());
+ frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
+ Ok(frm.into_ref())
+ }
+ fn flush(&mut self) {
+ self.dec.flush();
+ }
+}
+
+impl NAOptionHandler for SparkDecoder {
+ 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(SparkDecoder::new())
+}
+
+#[cfg(test)]
+mod test {
+ use nihav_core::codecs::RegisteredDecoders;
+ use nihav_core::demuxers::RegisteredDemuxers;
+ use nihav_codec_support::test::dec_video::*;
+ use crate::flash_register_all_decoders;
+ use crate::flash_register_all_demuxers;
+ #[test]
+ fn test_flv263() {
+ let mut dmx_reg = RegisteredDemuxers::new();
+ flash_register_all_demuxers(&mut dmx_reg);
+ let mut dec_reg = RegisteredDecoders::new();
+ flash_register_all_decoders(&mut dec_reg);
+
+ test_decoding("flv", "flv263", "assets/Flash/input.flv",
+ Some(1000), &dmx_reg, &dec_reg, ExpectedTestResult::MD5Frames(vec![
+ [0x9110718e, 0x794e22ad, 0x3324e552, 0xf58a0449],
+ [0x2f7cfcd1, 0x1d6bb63b, 0x37dcd87d, 0xb0247d9c],
+ [0x317e6355, 0xc632f2d5, 0x1d6ae472, 0x45cc1ba6],
+ [0x7d883ffc, 0xaa8e7c68, 0x8dec683b, 0x0e0dcdea],
+ [0x79d4cece, 0x98749753, 0xfedb0fb1, 0x5398f6a0],
+ [0x153f1558, 0xd98a700c, 0xdb166ebe, 0xc347fd61],
+ [0x0b31c6a9, 0xcb126876, 0xd7dd8626, 0x4a6fea9f]]));
+ }
+}
projects / nihav.git / blobdiff