1 use nihav_core::io::bitreader::*;
2 use nihav_core::io::codebook::*;
3 use nihav_core::formats;
4 use nihav_core::frame::*;
5 use nihav_core::codecs::*;
6 use nihav_codec_support::codecs::{MV, ZIGZAG};
7 use nihav_codec_support::codecs::h263::*;
8 use nihav_codec_support::codecs::h263::code::*;
9 use nihav_codec_support::codecs::h263::decoder::*;
10 use nihav_codec_support::codecs::h263::data::*;
14 intra_mcbpc_cb: Codebook<u8>,
15 inter_mcbpc_cb: Codebook<u8>,
16 cbpy_cb: Codebook<u8>,
17 rl_cb: Codebook<H263RLSym>,
18 aic_rl_cb: Codebook<H263RLSym>,
39 fn decode_mv_component(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<i16> {
40 let code = i16::from(br.read_cb(mv_cb)?);
41 if code == 0 { return Ok(0) }
49 fn decode_mv(br: &mut BitReader, mv_cb: &Codebook<u8>) -> DecoderResult<MV> {
50 let xval = decode_mv_component(br, mv_cb)?;
51 let yval = decode_mv_component(br, mv_cb)?;
52 Ok(MV::new(xval, yval))
55 impl<'a> SparkBR<'a> {
56 fn new(src: &'a [u8], tables: &'a Tables, w: usize, h: usize) -> Self {
58 br: BitReader::new(src, BitReaderMode::BE),
66 fn decode_block(&mut self, quant: u8, intra: bool, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
67 let br = &mut self.br;
70 let mut dc = br.read(8)?;
71 if dc == 255 { dc = 128; }
72 blk[0] = (dc as i16) << 3;
75 if !coded { return Ok(()); }
77 let rl_cb = &self.tables.rl_cb; // could be aic too
78 let q_add = if quant == 0 { 0i16 } else { i16::from((quant - 1) | 1) };
79 let q = i16::from(quant * 2);
81 let code = br.read_cb(rl_cb)?;
85 if !code.is_escape() {
87 level = code.get_level();
88 last = code.is_last();
89 if br.read_bool()? { level = -level; }
91 level = (level * q) + q_add;
93 level = (level * q) - q_add;
95 } else if !self.ver1 {
96 last = br.read_bool()?;
97 run = br.read(6)? as u8;
98 level = br.read_s(8)? as i16;
100 let low = br.read(5)? as i16;
101 let top = br.read_s(6)? as i16;
102 level = (top << 5) | low;
105 level = (level * q) + q_add;
107 level = (level * q) - q_add;
109 if level < -2048 { level = -2048; }
110 if level > 2047 { level = 2047; }
112 let fmt_bit = br.read_bool()?;
113 last = br.read_bool()?;
114 run = br.read(6)? as u8;
115 level = br.read_s(if !fmt_bit { 7 } else { 11 })? as i16;
116 validate!(level != 0);
118 validate!(level != 64);
120 validate!(level != 1024);
123 level = (level * q) + q_add;
125 level = (level * q) - q_add;
127 if level < -2048 { level = -2048; }
128 if level > 2047 { level = 2047; }
132 let oidx = ZIGZAG[idx as usize];
142 impl<'a> BlockDecoder for SparkBR<'a> {
143 fn decode_pichdr(&mut self) -> DecoderResult<PicInfo> {
144 let br = &mut self.br;
145 let syncw = br.read(17)?;
146 validate!(syncw == 1);
147 let version = br.read(5)?;
148 validate!(version == 0 || version == 1);
149 self.ver1 = version == 1;
150 let tr = (br.read(8)? << 8) as u16;
151 let sfmt = br.read(3)?;
152 validate!(sfmt != 0b111);
153 let (w, h) = match sfmt {
155 let w = br.read(8)? as usize;
156 let h = br.read(8)? as usize;
157 validate!(w != 0 && h != 0);
161 let w = br.read(16)? as usize;
162 let h = br.read(16)? as usize;
163 validate!(w != 0 && h != 0);
173 let pic_type = br.read(2)?;
174 let ftype = match pic_type {
178 _ => return Err(DecoderError::InvalidData),
180 let deblock = br.read_bool()?;
181 let quant = br.read(5)?;
182 while br.read_bool()? { // skip PEI
185 self.mb_w = (w + 15) >> 4;
186 self.mb_h = (h + 15) >> 4;
188 let plusinfo = if deblock { Some(PlusInfo::new(false, deblock, false, false)) } else { None };
189 let picinfo = PicInfo::new(w, h, ftype, MVMode::Long, true, false, quant as u8, tr, None, plusinfo);
192 fn decode_slice_header(&mut self, info: &PicInfo) -> DecoderResult<SliceInfo> {
193 Ok(SliceInfo::new(0, 0, self.mb_w * self.mb_h, info.quant))
195 fn decode_block_header(&mut self, info: &PicInfo, slice: &SliceInfo, _sstate: &SliceState) -> DecoderResult<BlockInfo> {
196 let br = &mut self.br;
197 let mut q = slice.get_quant();
198 match info.get_mode() {
200 let mut cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?;
201 while cbpc == 8 { cbpc = br.read_cb(&self.tables.intra_mcbpc_cb)?; }
202 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
203 let cbp = (cbpy << 2) | (cbpc & 3);
204 let dquant = (cbpc & 4) != 0;
206 let idx = br.read(2)? as usize;
207 q = (i16::from(q) + i16::from(H263_DQUANT_TAB[idx])) as u8;
209 Ok(BlockInfo::new(Type::I, cbp, q))
211 Type::P | Type::Special => {
213 return Ok(BlockInfo::new(Type::Skip, 0, info.get_quant()));
215 let mut cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?;
216 while cbpc == 20 { cbpc = br.read_cb(&self.tables.inter_mcbpc_cb)?; }
217 let is_intra = (cbpc & 0x04) != 0;
218 let dquant = (cbpc & 0x08) != 0;
219 let is_4x4 = (cbpc & 0x10) != 0;
221 let cbpy = br.read_cb(&self.tables.cbpy_cb)?;
222 let cbp = (cbpy << 2) | (cbpc & 3);
224 let idx = br.read(2)? as usize;
225 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
228 let binfo = BlockInfo::new(Type::I, cbp, q);
232 let mut cbpy = br.read_cb(&self.tables.cbpy_cb)?;
233 // if /* !aiv && */(cbpc & 3) != 3 {
236 let cbp = (cbpy << 2) | (cbpc & 3);
238 let idx = br.read(2)? as usize;
239 q = ((q as i16) + (H263_DQUANT_TAB[idx] as i16)) as u8;
242 let mut binfo = BlockInfo::new(Type::P, cbp, q);
244 let mvec: [MV; 1] = [decode_mv(br, &self.tables.mv_cb)?];
247 let mvec: [MV; 4] = [
248 decode_mv(br, &self.tables.mv_cb)?,
249 decode_mv(br, &self.tables.mv_cb)?,
250 decode_mv(br, &self.tables.mv_cb)?,
251 decode_mv(br, &self.tables.mv_cb)?
257 _ => { Err(DecoderError::InvalidData) },
260 fn decode_block_intra(&mut self, _info: &BlockInfo, _sstate: &SliceState, quant: u8, _no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
261 self.decode_block(quant, true, coded, blk)
263 fn decode_block_inter(&mut self, _info: &BlockInfo, _sstate: &SliceState, quant: u8, _no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()> {
264 self.decode_block(quant, false, coded, blk)
266 fn is_slice_end(&mut self) -> bool { self.br.peek(16) == 0 }
271 let mut coderead = H263ShortCodeReader::new(H263_INTRA_MCBPC);
272 let intra_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
273 let mut coderead = H263ShortCodeReader::new(H263_INTER_MCBPC);
274 let inter_mcbpc_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
275 let mut coderead = H263ShortCodeReader::new(H263_CBPY);
276 let cbpy_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
277 let mut coderead = H263RLCodeReader::new(H263_RL_CODES);
278 let rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
279 let mut coderead = H263RLCodeReader::new(H263_RL_CODES_AIC);
280 let aic_rl_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
281 let mut coderead = H263ShortCodeReader::new(H263_MV);
282 let mv_cb = Codebook::new(&mut coderead, CodebookMode::MSB).unwrap();
283 let tables = Tables {
293 info: NACodecInfo::new_dummy(),
294 dec: H263BaseDecoder::new(true),
296 bdsp: H263BlockDSP::new(),
303 impl NADecoder for SparkDecoder {
304 fn init(&mut self, _supp: &mut NADecoderSupport, info: NACodecInfoRef) -> DecoderResult<()> {
305 if let NACodecTypeInfo::Video(vinfo) = info.get_properties() {
306 let w = vinfo.get_width();
307 let h = vinfo.get_height();
308 let fmt = formats::YUV420_FORMAT;
309 let myinfo = NACodecTypeInfo::Video(NAVideoInfo::new(w, h, false, fmt));
310 self.info = NACodecInfo::new_ref(info.get_name(), myinfo, info.get_extradata()).into_ref();
316 Err(DecoderError::InvalidData)
319 fn decode(&mut self, _supp: &mut NADecoderSupport, pkt: &NAPacket) -> DecoderResult<NAFrameRef> {
320 let src = pkt.get_buffer();
322 let mut ibr = SparkBR::new(&src, &self.tables, self.w, self.h);
323 let bufinfo = self.dec.parse_frame(&mut ibr, &self.bdsp)?;
325 let mut frm = NAFrame::new_from_pkt(pkt, self.info.clone(), bufinfo);
326 frm.set_keyframe(self.dec.is_intra());
327 frm.set_frame_type(if self.dec.is_intra() { FrameType::I } else { FrameType::P });
330 fn flush(&mut self) {
335 impl NAOptionHandler for SparkDecoder {
336 fn get_supported_options(&self) -> &[NAOptionDefinition] { &[] }
337 fn set_options(&mut self, _options: &[NAOption]) { }
338 fn query_option_value(&self, _name: &str) -> Option<NAValue> { None }
341 pub fn get_decoder() -> Box<dyn NADecoder + Send> {
342 Box::new(SparkDecoder::new())
347 use nihav_core::codecs::RegisteredDecoders;
348 use nihav_core::demuxers::RegisteredDemuxers;
349 use nihav_codec_support::test::dec_video::*;
350 use crate::flash_register_all_decoders;
351 use crate::flash_register_all_demuxers;
354 let mut dmx_reg = RegisteredDemuxers::new();
355 flash_register_all_demuxers(&mut dmx_reg);
356 let mut dec_reg = RegisteredDecoders::new();
357 flash_register_all_decoders(&mut dec_reg);
359 test_decoding("flv", "flv263", "assets/Flash/input.flv",
360 Some(1000), &dmx_reg, &dec_reg, ExpectedTestResult::MD5Frames(vec![
361 [0x9110718e, 0x794e22ad, 0x3324e552, 0xf58a0449],
362 [0x2f7cfcd1, 0x1d6bb63b, 0x37dcd87d, 0xb0247d9c],
363 [0x317e6355, 0xc632f2d5, 0x1d6ae472, 0x45cc1ba6],
364 [0x7d883ffc, 0xaa8e7c68, 0x8dec683b, 0x0e0dcdea],
365 [0x79d4cece, 0x98749753, 0xfedb0fb1, 0x5398f6a0],
366 [0x153f1558, 0xd98a700c, 0xdb166ebe, 0xc347fd61],
367 [0x0b31c6a9, 0xcb126876, 0xd7dd8626, 0x4a6fea9f]]));