(sps []byte)
| 309 | } |
| 310 | |
| 311 | func (ctx *HVCDecoderConfigurationRecord) ParseSps(sps []byte) error { |
| 312 | var err error |
| 313 | |
| 314 | if len(sps) < 2 { |
| 315 | return ErrHevc |
| 316 | } |
| 317 | |
| 318 | rbsp := nal2rbsp(sps[2:]) |
| 319 | br := nazabits.NewBitReader(rbsp) |
| 320 | |
| 321 | // sps_video_parameter_set_id |
| 322 | if _, err = br.ReadBits8(4); err != nil { |
| 323 | return err |
| 324 | } |
| 325 | |
| 326 | spsMaxSubLayersMinus1, err := br.ReadBits8(3) |
| 327 | if err != nil { |
| 328 | return err |
| 329 | } |
| 330 | |
| 331 | if spsMaxSubLayersMinus1+1 > ctx.numTemporalLayers { |
| 332 | ctx.numTemporalLayers = spsMaxSubLayersMinus1 + 1 |
| 333 | } |
| 334 | |
| 335 | // sps_temporal_id_nesting_flag |
| 336 | if ctx.temporalIdNested, err = br.ReadBit(); err != nil { |
| 337 | return err |
| 338 | } |
| 339 | |
| 340 | if err = ctx.parsePtl(&br, spsMaxSubLayersMinus1); err != nil { |
| 341 | return err |
| 342 | } |
| 343 | |
| 344 | // sps_seq_parameter_set_id |
| 345 | if _, err = br.ReadGolomb(); err != nil { |
| 346 | return err |
| 347 | } |
| 348 | |
| 349 | var cf uint32 |
| 350 | if cf, err = br.ReadGolomb(); err != nil { |
| 351 | return err |
| 352 | } |
| 353 | ctx.chromaFormat = uint8(cf) |
| 354 | if ctx.chromaFormat == 3 { |
| 355 | if _, err = br.ReadBit(); err != nil { |
| 356 | return err |
| 357 | } |
| 358 | } |
| 359 | |
| 360 | if ctx.PicWidthInLumaSamples, err = br.ReadGolomb(); err != nil { |
| 361 | return err |
| 362 | } |
| 363 | if ctx.PicHeightInLumaSamples, err = br.ReadGolomb(); err != nil { |
| 364 | return err |
| 365 | } |
| 366 | |
| 367 | conformanceWindowFlag, err := br.ReadBit() |
| 368 | if err != nil { |
no test coverage detected