Exemplo n.º 1
0
    @Override
    public void consume(ParsableByteArray data, boolean payloadUnitStartIndicator) {
      // Skip pointer.
      if (payloadUnitStartIndicator) {
        int pointerField = data.readUnsignedByte();
        data.skip(pointerField);
      }

      data.readBytes(patScratch, 3);
      patScratch.skipBits(12); // table_id (8), section_syntax_indicator (1), '0' (1), reserved (2)
      int sectionLength = patScratch.readBits(12);
      // transport_stream_id (16), reserved (2), version_number (5), current_next_indicator (1),
      // section_number (8), last_section_number (8)
      data.skip(5);

      int programCount = (sectionLength - 9) / 4;
      for (int i = 0; i < programCount; i++) {
        data.readBytes(patScratch, 4);
        patScratch.skipBits(19); // program_number (16), reserved (3)
        int pid = patScratch.readBits(13);
        tsPayloadReaders.put(pid, new PmtReader());
      }

      // Skip CRC_32.
    }
Exemplo n.º 2
0
  @Override
  public int read(DataSource dataSource) throws IOException {
    int bytesRead =
        dataSource.read(tsPacketBuffer.data, tsPacketBytesRead, TS_PACKET_SIZE - tsPacketBytesRead);
    if (bytesRead == -1) {
      return -1;
    }

    tsPacketBytesRead += bytesRead;
    if (tsPacketBytesRead < TS_PACKET_SIZE) {
      // We haven't read the whole packet yet.
      return bytesRead;
    }

    // Reset before reading the packet.
    tsPacketBytesRead = 0;
    tsPacketBuffer.setPosition(0);
    tsPacketBuffer.setLimit(TS_PACKET_SIZE);

    int syncByte = tsPacketBuffer.readUnsignedByte();
    if (syncByte != TS_SYNC_BYTE) {
      return bytesRead;
    }

    tsPacketBuffer.readBytes(tsScratch, 3);
    tsScratch.skipBits(1); // transport_error_indicator
    boolean payloadUnitStartIndicator = tsScratch.readBit();
    tsScratch.skipBits(1); // transport_priority
    int pid = tsScratch.readBits(13);
    tsScratch.skipBits(2); // transport_scrambling_control
    boolean adaptationFieldExists = tsScratch.readBit();
    boolean payloadExists = tsScratch.readBit();
    // Last 4 bits of scratch are skipped: continuity_counter

    // Skip the adaptation field.
    if (adaptationFieldExists) {
      int adaptationFieldLength = tsPacketBuffer.readUnsignedByte();
      tsPacketBuffer.skip(adaptationFieldLength);
    }

    // Read the payload.
    if (payloadExists) {
      TsPayloadReader payloadReader = tsPayloadReaders.get(pid);
      if (payloadReader != null) {
        payloadReader.consume(tsPacketBuffer, payloadUnitStartIndicator);
      }
    }

    if (!prepared) {
      prepared = checkPrepared();
    }

    return bytesRead;
  }
Exemplo n.º 3
0
 /**
  * Continues a read from the provided {@code source} into a given {@code target}. It's assumed
  * that the data should be written into {@code target} starting from an offset of zero.
  *
  * @param source The source from which to read.
  * @param target The target into which data is to be read, or {@code null} to skip.
  * @param targetLength The target length of the read.
  * @return Whether the target length has been reached.
  */
 private boolean continueRead(ParsableByteArray source, byte[] target, int targetLength) {
   int bytesToRead = Math.min(source.bytesLeft(), targetLength - bytesRead);
   if (bytesToRead <= 0) {
     return true;
   } else if (target == null) {
     source.skip(bytesToRead);
   } else {
     source.readBytes(target, bytesRead, bytesToRead);
   }
   bytesRead += bytesToRead;
   return bytesRead == targetLength;
 }
  private static void parseUuid(
      ParsableByteArray uuid, TrackFragment out, byte[] extendedTypeScratch)
      throws ParserException {
    uuid.setPosition(Atom.HEADER_SIZE);
    uuid.readBytes(extendedTypeScratch, 0, 16);

    // Currently this parser only supports Microsoft's PIFF SampleEncryptionBox.
    if (!Arrays.equals(extendedTypeScratch, PIFF_SAMPLE_ENCRYPTION_BOX_EXTENDED_TYPE)) {
      return;
    }

    // Except for the extended type, this box is identical to a SENC box. See "Portable encoding of
    // audio-video objects: The Protected Interoperable File Format (PIFF), John A. Bocharov et al,
    // Section 5.3.2.1."
    parseSenc(uuid, 16, out);
  }
Exemplo n.º 5
0
    @Override
    public void consume(ParsableByteArray data, boolean payloadUnitStartIndicator) {
      // Skip pointer.
      if (payloadUnitStartIndicator) {
        int pointerField = data.readUnsignedByte();
        data.skip(pointerField);
      }

      data.readBytes(pmtScratch, 3);
      pmtScratch.skipBits(12); // table_id (8), section_syntax_indicator (1), '0' (1), reserved (2)
      int sectionLength = pmtScratch.readBits(12);

      // program_number (16), reserved (2), version_number (5), current_next_indicator (1),
      // section_number (8), last_section_number (8), reserved (3), PCR_PID (13)
      // Skip the rest of the PMT header.
      data.skip(7);

      data.readBytes(pmtScratch, 2);
      pmtScratch.skipBits(4);
      int programInfoLength = pmtScratch.readBits(12);

      // Skip the descriptors.
      data.skip(programInfoLength);

      int entriesSize =
          sectionLength
              - 9 /* Size of the rest of the fields before descriptors */
              - programInfoLength
              - 4 /* CRC size */;
      while (entriesSize > 0) {
        data.readBytes(pmtScratch, 5);
        int streamType = pmtScratch.readBits(8);
        pmtScratch.skipBits(3); // reserved
        int elementaryPid = pmtScratch.readBits(13);
        pmtScratch.skipBits(4); // reserved
        int esInfoLength = pmtScratch.readBits(12);

        // Skip the descriptors.
        data.skip(esInfoLength);
        entriesSize -= esInfoLength + 5;

        if (sampleQueues.get(streamType) != null) {
          continue;
        }

        ElementaryStreamReader pesPayloadReader = null;
        switch (streamType) {
          case TS_STREAM_TYPE_AAC:
            pesPayloadReader = new AdtsReader(bufferPool);
            break;
          case TS_STREAM_TYPE_H264:
            SeiReader seiReader = new SeiReader(bufferPool);
            sampleQueues.put(TS_STREAM_TYPE_EIA608, seiReader);
            pesPayloadReader = new H264Reader(bufferPool, seiReader);
            break;
          case TS_STREAM_TYPE_ID3:
            pesPayloadReader = new Id3Reader(bufferPool);
            break;
        }

        if (pesPayloadReader != null) {
          sampleQueues.put(streamType, pesPayloadReader);
          tsPayloadReaders.put(elementaryPid, new PesReader(pesPayloadReader));
        }
      }

      // Skip CRC_32.
    }