Exemplo n.º 1
0
  /**
   * Last step of the OggVorbis_File initialization; get all the vorbis_info structs and PCM
   * positions. Only called by the seekable initialization (local stream storage is hacked slightly;
   * pay attention to how that's done)
   *
   * @param firstInfo first info
   * @param firstComment first comment
   * @param dataoffset data offset
   * @throws JOrbisException if an error occurs
   */
  void prefetchAllHeaders(Info firstInfo, Comment firstComment, int dataoffset)
      throws JOrbisException {
    Page og = new Page();
    int ret;

    vi = new Info[links];
    vc = new Comment[links];
    dataoffsets = new long[links];
    pcmlengths = new long[links];
    serialnos = new int[links];

    for (int i = 0; i < links; i++) {
      if (firstInfo != null && firstComment != null && i == 0) {
        // we already grabbed the initial header earlier. This just
        // saves the waste of grabbing it again
        vi[i] = firstInfo;
        vc[i] = firstComment;
        dataoffsets[i] = dataoffset;
      } else {
        // seek to the location of the initial header
        seekHelper(offsets[i]); // !!!
        vi[i] = new Info();
        vc[i] = new Comment();
        if (fetchHeaders(vi[i], vc[i], null, null) == -1) {
          dataoffsets[i] = -1;
        } else {
          dataoffsets[i] = offset;
          os.clear();
        }
      }

      // get the serial number and PCM length of this link. To do this,
      // get the last page of the stream
      long end = offsets[i + 1]; // !!!
      seekHelper(end);

      while (true) {
        ret = getPrevPage(og);
        if (ret == -1) {
          // this should not be possible
          vi[i].clear();
          vc[i].clear();
          break;
        }
        if (og.granulepos() != -1) {
          serialnos[i] = og.serialno();
          pcmlengths[i] = og.granulepos();
          break;
        }
      }
    }
  }
 private void prefetchAllHeaders(
     final Info firstInfo, final Comment firstComment, final int dataoffset) {
   final Page page = new Page();
   this.m_info = new Info[this.m_links];
   this.m_comments = new Comment[this.m_links];
   this.m_dataOffsets = new long[this.m_links];
   this.m_pcmLengths = new long[this.m_links];
   this.m_serialnos = new int[this.m_links];
   for (int i = 0; i < this.m_links; ++i) {
     if (firstInfo != null && firstComment != null && i == 0) {
       this.m_info[i] = firstInfo;
       this.m_comments[i] = firstComment;
       this.m_dataOffsets[i] = dataoffset;
     } else {
       this.seekHelper(this.m_offsets[i]);
       this.m_info[i] = new Info();
       this.m_comments[i] = new Comment();
       if (this.fetchHeaders(this.m_info[i], this.m_comments[i], null, null) == -1) {
         this.m_dataOffsets[i] = -1L;
       } else {
         this.m_dataOffsets[i] = this.m_offset;
         this.m_oggStreamState.clear();
       }
     }
     final long end = this.m_offsets[i + 1];
     this.seekHelper(end);
     while (true) {
       final int ret = this.getPreviousPage(page);
       if (ret == -1) {
         this.m_info[i].clear();
         break;
       }
       if (page.granulepos() != -1L) {
         this.m_serialnos[i] = page.serialno();
         this.m_pcmLengths[i] = page.granulepos();
         break;
       }
     }
   }
 }
Exemplo n.º 3
0
  /** @return negative value on error */
  private int seekDuration() {
    this.startOffset = getNextPageOffset();

    seek(getData().size());

    Page og = new Page();

    int endOffset = getPrevPage(og, serialno);
    if (endOffset < 0) {
      return -1;
    } else {
      numFrames = (int) og.granulepos();
      seek(startOffset);
      return 0;
    }
  }
 @Override
 public int pcmSeek(final long pos) {
   if (!this.m_vorbisStream.isSeekable()) {
     return -1;
   }
   long total = this.pcmTotal(-1);
   if (pos < 0L || pos > total) {
     this.m_pcmOffset = -1L;
     this.decodeClear();
     return -1;
   }
   int link;
   for (link = this.m_links - 1; link >= 0; --link) {
     total -= this.m_pcmLengths[link];
     if (pos >= total) {
       break;
     }
   }
   final long target = pos - total;
   long end = this.m_offsets[link + 1];
   long begin = this.m_offsets[link];
   int best = (int) begin;
   final Page page = new Page();
   while (begin < end) {
     long bisect;
     if (end - begin < this.m_chunkSize) {
       bisect = begin;
     } else {
       bisect = (end + begin) / 2L;
     }
     this.seekHelper(bisect);
     final int ret = this.getNextPage(page, end - bisect);
     if (ret == -1) {
       end = bisect;
     } else {
       final long granulepos = page.granulepos();
       if (granulepos < target) {
         best = ret;
         begin = this.m_offset;
       } else {
         end = bisect;
       }
     }
   }
   if (this.rawSeek(best) != 0) {
     this.m_pcmOffset = -1L;
     this.decodeClear();
     return -1;
   }
   if (this.m_pcmOffset >= pos) {
     this.m_pcmOffset = -1L;
     this.decodeClear();
     return -1;
   }
   if (pos > this.pcmTotal(-1)) {
     this.m_pcmOffset = -1L;
     this.decodeClear();
     return -1;
   }
   while (this.m_pcmOffset < pos) {
     final int target2 = (int) (pos - this.m_pcmOffset);
     final int[] _index = new int[this.m_info[this.m_currentLink].channelsCount];
     int samples = this.m_dspState.synthesis_pcmout(this.m_pcmf_buffer, _index);
     if (samples > target2) {
       samples = target2;
     }
     this.m_dspState.synthesis_read(samples);
     this.m_pcmOffset += samples;
     if (samples < target2 && this.processPacket(true) == 0) {
       this.m_pcmOffset = this.pcmTotal(-1);
     }
   }
   return 0;
 }
Exemplo n.º 5
0
  /*
   * Taken from the JOrbis Player
   */
  private void playStream(Thread me) throws InternalException {
    boolean chained = false;

    initJOrbis();

    while (true) {
      if (checkState()) {
        return;
      }

      int eos = 0;

      int index = oy.buffer(BUFSIZE);
      buffer = oy.data;
      try {
        bytes = bitStream.read(buffer, index, BUFSIZE);
      } catch (Exception e) {
        throw new InternalException(e);
      }
      oy.wrote(bytes);

      if (chained) {
        chained = false;
      } else {
        if (oy.pageout(og) != 1) {
          if (bytes < BUFSIZE) break;
          throw new InternalException("Input does not appear to be an Ogg bitstream.");
        }
      }
      os.init(og.serialno());
      os.reset();

      vi.init();
      vc.init();

      if (os.pagein(og) < 0) {
        // error; stream version mismatch perhaps
        throw new InternalException("Error reading first page of Ogg bitstream data.");
      }

      if (os.packetout(op) != 1) {
        // no page? must not be vorbis
        throw new InternalException("Error reading initial header packet.");
      }

      if (vi.synthesis_headerin(vc, op) < 0) {
        // error case; not a vorbis header
        throw new InternalException("This Ogg bitstream does not contain Vorbis audio data.");
      }

      int i = 0;

      while (i < 2) {
        while (i < 2) {
          if (checkState()) {
            return;
          }

          int result = oy.pageout(og);
          if (result == 0) break; // Need more data
          if (result == 1) {
            os.pagein(og);
            while (i < 2) {
              result = os.packetout(op);
              if (result == 0) break;
              if (result == -1) {
                throw new InternalException("Corrupt secondary header.  Exiting.");
              }
              vi.synthesis_headerin(vc, op);
              i++;
            }
          }
        }

        index = oy.buffer(BUFSIZE);
        buffer = oy.data;
        try {
          bytes = bitStream.read(buffer, index, BUFSIZE);
        } catch (Exception e) {
          throw new InternalException(e);
        }
        if (bytes == 0 && i < 2) {
          throw new InternalException("End of file before finding all Vorbis headers!");
        }
        oy.wrote(bytes);
      }

      convsize = BUFSIZE / vi.channels;

      vd.synthesis_init(vi);
      vb.init(vd);

      float[][][] _pcmf = new float[1][][];
      int[] _index = new int[vi.channels];

      getOutputLine(vi.channels, vi.rate);

      while (eos == 0) {
        while (eos == 0) {
          if (player != me) {
            return;
          }

          int result = oy.pageout(og);
          if (result == 0) break; // need more data
          if (result == -1) { // missing or corrupt data at this page
            // position
            // System.err.println("Corrupt or missing data in
            // bitstream;
            // continuing...");
          } else {
            os.pagein(og);

            if (og.granulepos() == 0) { //
              chained = true; //
              eos = 1; //
              break; //
            } //

            while (true) {
              if (checkState()) {
                return;
              }

              result = os.packetout(op);
              if (result == 0) break; // need more data
              if (result == -1) { // missing or corrupt data at
                // this page position
                // no reason to complain; already complained
                // above

                // System.err.println("no reason to complain;
                // already complained above");
              } else {
                // we have a packet. Decode it
                int samples;
                if (vb.synthesis(op) == 0) { // test for
                  // success!
                  vd.synthesis_blockin(vb);
                }
                while ((samples = vd.synthesis_pcmout(_pcmf, _index)) > 0) {
                  if (checkState()) {
                    return;
                  }

                  float[][] pcmf = _pcmf[0];
                  int bout = (samples < convsize ? samples : convsize);

                  // convert doubles to 16 bit signed ints
                  // (host order) and
                  // interleave
                  for (i = 0; i < vi.channels; i++) {
                    int ptr = i * 2;
                    // int ptr=i;
                    int mono = _index[i];
                    for (int j = 0; j < bout; j++) {
                      int val = (int) (pcmf[i][mono + j] * 32767.);
                      if (val > 32767) {
                        val = 32767;
                      }
                      if (val < -32768) {
                        val = -32768;
                      }
                      if (val < 0) val = val | 0x8000;
                      convbuffer[ptr] = (byte) (val);
                      convbuffer[ptr + 1] = (byte) (val >>> 8);
                      ptr += 2 * (vi.channels);
                    }
                  }
                  outputLine.write(convbuffer, 0, 2 * vi.channels * bout);
                  vd.synthesis_read(bout);
                }
              }
            }
            if (og.eos() != 0) eos = 1;
          }
        }

        if (eos == 0) {
          index = oy.buffer(BUFSIZE);
          buffer = oy.data;
          try {
            bytes = bitStream.read(buffer, index, BUFSIZE);
          } catch (Exception e) {
            throw new InternalException(e);
          }
          if (bytes == -1) {
            break;
          }
          oy.wrote(bytes);
          if (bytes == 0) eos = 1;
        }
      }

      os.clear();
      vb.clear();
      vd.clear();
      vi.clear();
    }

    oy.clear();
  }
Exemplo n.º 6
0
  /**
   * Seek to a sample offset relative to the decompressed pcm stream.
   *
   * @param pos position
   * @return zero on success, nonzero on failure
   */
  public int pcmSeek(long pos) {
    int link = -1;
    long total = pcmTotal(-1);

    if (!seekable) {
      return (-1); // don't dump machine if we can't seek
    }
    if (pos < 0 || pos > total) {
      // goto seek_error;
      pcmOffset = -1;
      decodeClear();
      return -1;
    }

    // which bitstream section does this pcm offset occur in?
    for (link = links - 1; link >= 0; link--) {
      total -= pcmlengths[link];
      if (pos >= total) {
        break;
      }
    }

    // search within the logical bitstream for the page with the highest
    // pcm_pos preceeding (or equal to) pos. There is a danger here;
    // missing pages or incorrect frame number information in the
    // bitstream could make our task impossible. Account for that (it
    // would be an error condition)
    long target = pos - total;
    long end = offsets[link + 1];
    long begin = offsets[link];
    int best = (int) begin;

    Page og = new Page();
    while (begin < end) {
      long bisect;
      int ret;

      if (end - begin < CHUNKSIZE) {
        bisect = begin;
      } else {
        bisect = (end + begin) / 2;
      }

      seekHelper(bisect);
      ret = getNextPage(og, end - bisect);

      if (ret == -1) {
        end = bisect;
      } else {
        long granulepos = og.granulepos();
        if (granulepos < target) {
          best = ret; // raw offset of packet with granulepos
          begin = offset; // raw offset of next packet
        } else {
          end = bisect;
        }
      }
    }
    // found our page. seek to it (call raw_seek).
    if (rawSeek(best) != 0) {
      // goto seek_error;
      pcmOffset = -1;
      decodeClear();
      return -1;
    }

    // verify result
    if (pcmOffset >= pos) {
      // goto seek_error;
      pcmOffset = -1;
      decodeClear();
      return -1;
    }
    if (pos > pcmTotal(-1)) {
      // goto seek_error;
      pcmOffset = -1;
      decodeClear();
      return -1;
    }

    // discard samples until we reach the desired position. Crossing a
    // logical bitstream boundary with abandon is OK.
    while (pcmOffset < pos) {
      int target2 = (int) (pos - pcmOffset);
      float[][][] lPcm = new float[1][][];
      int[] lIndex = new int[getInfo(-1).channels];
      int samples = vd.synthesisPcmout(lPcm, lIndex);

      if (samples > target2) {
        samples = target2;
      }
      vd.synthesisRead(samples);
      pcmOffset += samples;

      if (samples < target2) {
        if (processPacket(1) == 0) {
          pcmOffset = pcmTotal(-1); // eof
        }
      }
    }
    return 0;

    // seek_error:
    // dump machine so we're in a known state
    // pcm_offset=-1;
    // decode_clear();
    // return -1;
  }