Пример #1
0
  private void releaseResources() {
    if (outputStream != null) {
      try {
        outputStream.close();
      } catch (IOException e) {
        e.printStackTrace();
      } finally {
        outputStream = null;
      }
    }

    if (tracks != null) {
      for (Track track : tracks) {
        try {
          track.release();
        } catch (Exception e) {
          e.printStackTrace();
        }
      }
    }
  }
Пример #2
0
  @Override
  protected Exception doInBackground(Track... tracks) {
    Thread.currentThread().setPriority(Thread.MAX_PRIORITY - 1);

    try {
      this.tracks = tracks;

      for (Track track : tracks) {
        track.startStream();
        if (sampleMode) {
          track.addOffsetFrame(-skipFrame);
        }
      }
      outputStream = new VorbisFileOutputStream(outputFileName);

      int read = 0;
      int totalRead = 0;
      int durationInMilli = (int) tracks[0].getDuration();
      int durationInSec = durationInMilli / 1000;
      int estimateLength = durationInSec * PcmPlayer.SAMPLERATE * PcmPlayer.CHANNELS;
      int estimateLengthInPercent = estimateLength / 100;
      int preProgressInPercent = 0;
      int currentProgressInPercent = 0;
      short[] pcm = new short[BUFFER_SIZE];

      int fadeInThreshold = pcm.length * FADE_IN_AND_OUT_DISCRETE_DIVIDER;
      int fadeOutThreshold = SAMPLE_LENGTH - pcm.length * FADE_IN_AND_OUT_DISCRETE_DIVIDER;
      float volume = 0;
      float volumeChangeAmount = 1f / FADE_IN_AND_OUT_DISCRETE_DIVIDER;

      while (!interrupted && read != -1) {
        Arrays.fill(pcm, (short) 0);

        for (Track track : tracks) {
          read = track.read(pcm);
          if (read == -1) {
            break;
          }
        }

        if (sampleMode) {
          if (totalRead > SAMPLE_LENGTH) {
            break;
          }

          if (totalRead < fadeInThreshold && volume < 1) {
            for (int i = 0; i < read; i++) {
              pcm[i] *= volume;
            }
            volume += volumeChangeAmount;
          }

          if (totalRead > fadeOutThreshold && volume > 0) {
            for (int i = 0; i < read; i++) {
              pcm[i] *= volume;
            }
            volume -= volumeChangeAmount;
          }
        }

        outputStream.write(pcm, 0, read);

        totalRead += read;
        currentProgressInPercent = Math.round(totalRead / estimateLengthInPercent);

        if (currentProgressInPercent > preProgressInPercent) {
          preProgressInPercent = currentProgressInPercent;
          publishProgress(currentProgressInPercent);
        }
      }

      return null;
    } catch (Exception e) {
      return e;
    }
  }