(w io.Writer, header MpegTsPESHeader)
| 348 | } |
| 349 | |
| 350 | func WritePESHeader(w io.Writer, header MpegTsPESHeader) (written int, err error) { |
| 351 | if header.PacketStartCodePrefix != 0x0000001 { |
| 352 | err = errors.New("write PacketStartCodePrefix is not 0x0000001") |
| 353 | return |
| 354 | } |
| 355 | |
| 356 | // packetStartCodePrefix(24) (0x000001) |
| 357 | if err = util.WriteUint24ToByte(w, header.PacketStartCodePrefix, true); err != nil { |
| 358 | return |
| 359 | } |
| 360 | |
| 361 | written += 3 |
| 362 | |
| 363 | // streamID(8) |
| 364 | if err = util.WriteUint8ToByte(w, header.StreamID); err != nil { |
| 365 | return |
| 366 | } |
| 367 | |
| 368 | written += 1 |
| 369 | |
| 370 | // pes_PacketLength(16) |
| 371 | // PES包长度可能为0,这个时候,需要自己去算 |
| 372 | // 0 <= len <= 65535 |
| 373 | if err = util.WriteUint16ToByte(w, header.PesPacketLength, true); err != nil { |
| 374 | return |
| 375 | } |
| 376 | |
| 377 | //fmt.Println("Length :", payloadLength) |
| 378 | //fmt.Println("PES Packet Length :", header.pes_PacketLength) |
| 379 | |
| 380 | written += 2 |
| 381 | |
| 382 | // constTen(2) |
| 383 | // pes_ScramblingControl(2) |
| 384 | // pes_Priority(1) |
| 385 | // dataAlignmentIndicator(1) |
| 386 | // copyright(1) |
| 387 | // originalOrCopy(1) |
| 388 | // 1000 0001 |
| 389 | if header.ConstTen != 0x80 { |
| 390 | err = errors.New("pes header ConstTen != 0x80") |
| 391 | return |
| 392 | } |
| 393 | |
| 394 | flags := header.ConstTen | header.PesScramblingControl | header.PesPriority | header.DataAlignmentIndicator | header.Copyright | header.OriginalOrCopy |
| 395 | if err = util.WriteUint8ToByte(w, flags); err != nil { |
| 396 | return |
| 397 | } |
| 398 | |
| 399 | written += 1 |
| 400 | |
| 401 | // pts_dts_Flags(2) |
| 402 | // escr_Flag(1) |
| 403 | // es_RateFlag(1) |
| 404 | // dsm_TrickModeFlag(1) |
| 405 | // additionalCopyInfoFlag(1) |
| 406 | // pes_CRCFlag(1) |
| 407 | // pes_ExtensionFlag(1) |
no test coverage detected