com.google.android.exoplayer2.util.Util.constrainValue()方法的使用及代码示例

x33g5p2x  于2022-02-01 转载在 其他  
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本文整理了Java中com.google.android.exoplayer2.util.Util.constrainValue()方法的一些代码示例，展示了Util.constrainValue()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Util.constrainValue()方法的具体详情如下：
包路径：com.google.android.exoplayer2.util.Util
类名称：Util
方法名：constrainValue

Util.constrainValue介绍

[英]Constrains a value to the specified bounds.
[中]将值约束到指定的边界。

代码示例

代码示例来源：origin: google/ExoPlayer

  1. /** Returns whether it's possible to apply the specified edit using gapless playback info. */
  2. private static boolean canApplyEditWithGaplessInfo(
  3.   long[] timestamps, long duration, long editStartTime, long editEndTime) {
  4.  int lastIndex = timestamps.length - 1;
  5.  int latestDelayIndex = Util.constrainValue(MAX_GAPLESS_TRIM_SIZE_SAMPLES, 0, lastIndex);
  6.  int earliestPaddingIndex =
  7.    Util.constrainValue(timestamps.length - MAX_GAPLESS_TRIM_SIZE_SAMPLES, 0, lastIndex);
  8.  return timestamps[0] <= editStartTime
  9.    && editStartTime < timestamps[latestDelayIndex]
  10.    && timestamps[earliestPaddingIndex] < editEndTime
  11.    && editEndTime <= duration;
  12. }

代码示例来源：origin: google/ExoPlayer

  1. /**
  2.  * Returns the sample index for the sample at given position.
  3.  *
  4.  * @param timeUs Time position in microseconds in the FLAC stream.
  5.  * @return The sample index for the sample at given position.
  6.  */
  7. public long getSampleIndex(long timeUs) {
  8.  long sampleIndex = (timeUs * sampleRate) / C.MICROS_PER_SECOND;
  9.  return Util.constrainValue(sampleIndex, 0, totalSamples - 1);
  10. }

代码示例来源：origin: google/ExoPlayer

  1. private long getFramePositionForTimeUs(long timeUs) {
  2.   long positionOffset = (timeUs * bitrate) / (C.MICROS_PER_SECOND * C.BITS_PER_BYTE);
  3.   // Constrain to nearest preceding frame offset.
  4.   positionOffset = (positionOffset / frameSize) * frameSize;
  5.   positionOffset =
  6.     Util.constrainValue(positionOffset, /* min= */ 0, /* max= */ dataSize - frameSize);
  7.   return firstFrameBytePosition + positionOffset;
  8.  }
  9. }

代码示例来源：origin: google/ExoPlayer

  1. private void positionScrubber(float xPosition) {
  2.  scrubberBar.right = Util.constrainValue((int) xPosition, progressBar.left, progressBar.right);
  3. }

代码示例来源：origin: google/ExoPlayer

  1. /**
  2.  * Ensures {@code peekBuffer} is large enough to store at least {@code length} bytes from the
  3.  * current peek position.
  4.  */
  5. private void ensureSpaceForPeek(int length) {
  6.  int requiredLength = peekBufferPosition + length;
  7.  if (requiredLength > peekBuffer.length) {
  8.   int newPeekCapacity = Util.constrainValue(peekBuffer.length * 2,
  9.     requiredLength + PEEK_MIN_FREE_SPACE_AFTER_RESIZE, requiredLength + PEEK_MAX_FREE_SPACE);
  10.   peekBuffer = Arrays.copyOf(peekBuffer, newPeekCapacity);
  11.  }
  12. }

代码示例来源：origin: google/ExoPlayer

  1. private SeekParameters clipSeekParameters(long positionUs, SeekParameters seekParameters) {
  2.  long toleranceBeforeUs =
  3.    Util.constrainValue(
  4.      seekParameters.toleranceBeforeUs, /* min= */ 0, /* max= */ positionUs - startUs);
  5.  long toleranceAfterUs =
  6.    Util.constrainValue(
  7.      seekParameters.toleranceAfterUs,
  8.      /* min= */ 0,
  9.      /* max= */ endUs == C.TIME_END_OF_SOURCE ? Long.MAX_VALUE : endUs - positionUs);
  10.  if (toleranceBeforeUs == seekParameters.toleranceBeforeUs
  11.    && toleranceAfterUs == seekParameters.toleranceAfterUs) {
  12.   return seekParameters;
  13.  } else {
  14.   return new SeekParameters(toleranceBeforeUs, toleranceAfterUs);
  15.  }
  16. }

代码示例来源：origin: google/ExoPlayer

  1. /**
  2.  * Sets the playback speed. Calling this method will discard any data buffered within the
  3.  * processor, and may update the value returned by {@link #isActive()}.
  4.  *
  5.  * @param speed The requested new playback speed.
  6.  * @return The actual new playback speed.
  7.  */
  8. public float setSpeed(float speed) {
  9.  speed = Util.constrainValue(speed, MINIMUM_SPEED, MAXIMUM_SPEED);
  10.  if (this.speed != speed) {
  11.   this.speed = speed;
  12.   sonic = null;
  13.  }
  14.  flush();
  15.  return speed;
  16. }

代码示例来源：origin: google/ExoPlayer

  1. /**
  2.  * Sets the playback pitch. Calling this method will discard any data buffered within the
  3.  * processor, and may update the value returned by {@link #isActive()}.
  4.  *
  5.  * @param pitch The requested new pitch.
  6.  * @return The actual new pitch.
  7.  */
  8. public float setPitch(float pitch) {
  9.  pitch = Util.constrainValue(pitch, MINIMUM_PITCH, MAXIMUM_PITCH);
  10.  if (this.pitch != pitch) {
  11.   this.pitch = pitch;
  12.   sonic = null;
  13.  }
  14.  flush();
  15.  return pitch;
  16. }

代码示例来源：origin: google/ExoPlayer

  1. | (initializationBytes[11] & 0xFF);
  2.  defaultVerticalPlacement = (float) requestedVerticalPlacement / calculatedVideoTrackHeight;
  3.  defaultVerticalPlacement = Util.constrainValue(defaultVerticalPlacement, 0.0f, 0.95f);
  4. } else {
  5.  defaultVerticalPlacement = DEFAULT_VERTICAL_PLACEMENT;

代码示例来源：origin: google/ExoPlayer

  1. private long getSegmentNum(
  2.   RepresentationHolder representationHolder,
  3.   @Nullable MediaChunk previousChunk,
  4.   long loadPositionUs,
  5.   long firstAvailableSegmentNum,
  6.   long lastAvailableSegmentNum) {
  7.  return previousChunk != null
  8.    ? previousChunk.getNextChunkIndex()
  9.    : Util.constrainValue(
  10.      representationHolder.getSegmentNum(loadPositionUs),
  11.      firstAvailableSegmentNum,
  12.      lastAvailableSegmentNum);
  13. }

代码示例来源：origin: google/ExoPlayer

  1. @Override
  2. public final int getBufferedPercentage() {
  3.  long position = getBufferedPosition();
  4.  long duration = getDuration();
  5.  return position == C.TIME_UNSET || duration == C.TIME_UNSET
  6.    ? 0
  7.    : duration == 0 ? 100 : Util.constrainValue((int) ((position * 100) / duration), 0, 100);
  8. }

代码示例来源：origin: google/ExoPlayer

  1. private void drawPlayhead(Canvas canvas) {
  2.  if (duration <= 0) {
  3.   return;
  4.  }
  5.  int playheadX = Util.constrainValue(scrubberBar.right, scrubberBar.left, progressBar.right);
  6.  int playheadY = scrubberBar.centerY();
  7.  if (scrubberDrawable == null) {
  8.   int scrubberSize = (scrubbing || isFocused()) ? scrubberDraggedSize
  9.     : (isEnabled() ? scrubberEnabledSize : scrubberDisabledSize);
  10.   int playheadRadius = scrubberSize / 2;
  11.   canvas.drawCircle(playheadX, playheadY, playheadRadius, scrubberPaint);
  12.  } else {
  13.   int scrubberDrawableWidth = scrubberDrawable.getIntrinsicWidth();
  14.   int scrubberDrawableHeight = scrubberDrawable.getIntrinsicHeight();
  15.   scrubberDrawable.setBounds(
  16.     playheadX - scrubberDrawableWidth / 2,
  17.     playheadY - scrubberDrawableHeight / 2,
  18.     playheadX + scrubberDrawableWidth / 2,
  19.     playheadY + scrubberDrawableHeight / 2);
  20.   scrubberDrawable.draw(canvas);
  21.  }
  22. }

代码示例来源：origin: google/ExoPlayer

  1. private void parsePaletteSection(ParsableByteArray buffer, int sectionLength) {
  2.  if ((sectionLength % 5) != 2) {
  3.   // Section must be two bytes followed by a whole number of (index, y, cb, cr, a) entries.
  4.   return;
  5.  }
  6.  buffer.skipBytes(2);
  7.  Arrays.fill(colors, 0);
  8.  int entryCount = sectionLength / 5;
  9.  for (int i = 0; i < entryCount; i++) {
  10.   int index = buffer.readUnsignedByte();
  11.   int y = buffer.readUnsignedByte();
  12.   int cr = buffer.readUnsignedByte();
  13.   int cb = buffer.readUnsignedByte();
  14.   int a = buffer.readUnsignedByte();
  15.   int r = (int) (y + (1.40200 * (cr - 128)));
  16.   int g = (int) (y - (0.34414 * (cb - 128)) - (0.71414 * (cr - 128)));
  17.   int b = (int) (y + (1.77200 * (cb - 128)));
  18.   colors[index] =
  19.     (a << 24)
  20.       | (Util.constrainValue(r, 0, 255) << 16)
  21.       | (Util.constrainValue(g, 0, 255) << 8)
  22.       | Util.constrainValue(b, 0, 255);
  23.  }
  24.  colorsSet = true;
  25. }

代码示例来源：origin: google/ExoPlayer

  1. @Override
  2. public void setVolume(float audioVolume) {
  3.  verifyApplicationThread();
  4.  audioVolume = Util.constrainValue(audioVolume, /* min= */ 0, /* max= */ 1);
  5.  if (this.audioVolume == audioVolume) {
  6.   return;
  7.  }
  8.  this.audioVolume = audioVolume;
  9.  sendVolumeToRenderers();
  10.  for (AudioListener audioListener : audioListeners) {
  11.   audioListener.onVolumeChanged(audioVolume);
  12.  }
  13. }

代码示例来源：origin: google/ExoPlayer

  1. private int getDefaultBufferSize() {
  2.  if (isInputPcm) {
  3.   int minBufferSize =
  4.     AudioTrack.getMinBufferSize(outputSampleRate, outputChannelConfig, outputEncoding);
  5.   Assertions.checkState(minBufferSize != ERROR_BAD_VALUE);
  6.   int multipliedBufferSize = minBufferSize * BUFFER_MULTIPLICATION_FACTOR;
  7.   int minAppBufferSize = (int) durationUsToFrames(MIN_BUFFER_DURATION_US) * outputPcmFrameSize;
  8.   int maxAppBufferSize = (int) Math.max(minBufferSize,
  9.     durationUsToFrames(MAX_BUFFER_DURATION_US) * outputPcmFrameSize);
  10.   return Util.constrainValue(multipliedBufferSize, minAppBufferSize, maxAppBufferSize);
  11.  } else {
  12.   int rate = getMaximumEncodedRateBytesPerSecond(outputEncoding);
  13.   if (outputEncoding == C.ENCODING_AC3) {
  14.    rate *= AC3_BUFFER_MULTIPLICATION_FACTOR;
  15.   }
  16.   return (int) (PASSTHROUGH_BUFFER_DURATION_US * rate / C.MICROS_PER_SECOND);
  17.  }
  18. }

代码示例来源：origin: TeamNewPipe/NewPipe

  1. private void publishFloatingQueueWindow() {
  2.   if (callback.getQueueSize() == 0) {
  3.     mediaSession.setQueue(Collections.emptyList());
  4.     activeQueueItemId = MediaSessionCompat.QueueItem.UNKNOWN_ID;
  5.     return;
  6.   }
  7.   // Yes this is almost a copypasta, got a problem with that? =\
  8.   int windowCount = callback.getQueueSize();
  9.   int currentWindowIndex = callback.getCurrentPlayingIndex();
  10.   int queueSize = Math.min(maxQueueSize, windowCount);
  11.   int startIndex = Util.constrainValue(currentWindowIndex - ((queueSize - 1) / 2), 0,
  12.       windowCount - queueSize);
  13.   List<MediaSessionCompat.QueueItem> queue = new ArrayList<>();
  14.   for (int i = startIndex; i < startIndex + queueSize; i++) {
  15.     queue.add(new MediaSessionCompat.QueueItem(callback.getQueueMetadata(i), i));
  16.   }
  17.   mediaSession.setQueue(queue);
  18.   activeQueueItemId = currentWindowIndex;
  19. }

代码示例来源：origin: google/ExoPlayer

  1. private void publishFloatingQueueWindow(Player player) {
  2.  if (player.getCurrentTimeline().isEmpty()) {
  3.   mediaSession.setQueue(Collections.emptyList());
  4.   activeQueueItemId = MediaSessionCompat.QueueItem.UNKNOWN_ID;
  5.   return;
  6.  }
  7.  int windowCount = player.getCurrentTimeline().getWindowCount();
  8.  int currentWindowIndex = player.getCurrentWindowIndex();
  9.  int queueSize = Math.min(maxQueueSize, windowCount);
  10.  int startIndex = Util.constrainValue(currentWindowIndex - ((queueSize - 1) / 2), 0,
  11.    windowCount - queueSize);
  12.  List<MediaSessionCompat.QueueItem> queue = new ArrayList<>();
  13.  for (int i = startIndex; i < startIndex + queueSize; i++) {
  14.   queue.add(new MediaSessionCompat.QueueItem(getMediaDescription(player, i), i));
  15.  }
  16.  mediaSession.setQueue(queue);
  17.  activeQueueItemId = currentWindowIndex;
  18. }

代码示例来源：origin: google/ExoPlayer

  1. /**
  2.  * Incrementally scrubs the position by {@code positionChange}.
  3.  *
  4.  * @param positionChange The change in the scrubber position, in milliseconds. May be negative.
  5.  * @return Returns whether the scrubber position changed.
  6.  */
  7. private boolean scrubIncrementally(long positionChange) {
  8.  if (duration <= 0) {
  9.   return false;
  10.  }
  11.  long scrubberPosition = getScrubberPosition();
  12.  scrubPosition = Util.constrainValue(scrubberPosition + positionChange, 0, duration);
  13.  if (scrubPosition == scrubberPosition) {
  14.   return false;
  15.  }
  16.  if (!scrubbing) {
  17.   startScrubbing();
  18.  }
  19.  for (OnScrubListener listener : listeners) {
  20.   listener.onScrubMove(this, scrubPosition);
  21.  }
  22.  update();
  23.  return true;
  24. }

代码示例来源：origin: google/ExoPlayer

  1. @Override
  2. public SeekPoints getSeekPoints(long timeUs) {
  3.  timeUs = Util.constrainValue(timeUs, 0, durationUs);
  4.  Pair<Long, Long> timeMsAndPosition =
  5.    linearlyInterpolate(C.usToMs(timeUs), referenceTimesMs, referencePositions);
  6.  timeUs = C.msToUs(timeMsAndPosition.first);
  7.  long position = timeMsAndPosition.second;
  8.  return new SeekPoints(new SeekPoint(timeUs, position));
  9. }

代码示例来源：origin: google/ExoPlayer

  1. @Override
  2. public SeekPoints getSeekPoints(long timeUs) {
  3.  long positionOffset = (timeUs * averageBytesPerSecond) / C.MICROS_PER_SECOND;
  4.  // Constrain to nearest preceding frame offset.
  5.  positionOffset = (positionOffset / blockAlignment) * blockAlignment;
  6.  positionOffset = Util.constrainValue(positionOffset, 0, dataSize - blockAlignment);
  7.  long seekPosition = dataStartPosition + positionOffset;
  8.  long seekTimeUs = getTimeUs(seekPosition);
  9.  SeekPoint seekPoint = new SeekPoint(seekTimeUs, seekPosition);
  10.  if (seekTimeUs >= timeUs || positionOffset == dataSize - blockAlignment) {
  11.   return new SeekPoints(seekPoint);
  12.  } else {
  13.   long secondSeekPosition = seekPosition + blockAlignment;
  14.   long secondSeekTimeUs = getTimeUs(secondSeekPosition);
  15.   SeekPoint secondSeekPoint = new SeekPoint(secondSeekTimeUs, secondSeekPosition);
  16.   return new SeekPoints(seekPoint, secondSeekPoint);
  17.  }
  18. }

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