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Diffstat (limited to 'src/com/android/tv/dvr/DvrPlayer.java')
| -rw-r--r-- | src/com/android/tv/dvr/DvrPlayer.java | 425 |
1 files changed, 425 insertions, 0 deletions
diff --git a/src/com/android/tv/dvr/DvrPlayer.java b/src/com/android/tv/dvr/DvrPlayer.java new file mode 100644 index 00000000..5656655c --- /dev/null +++ b/src/com/android/tv/dvr/DvrPlayer.java @@ -0,0 +1,425 @@ +/* + * Copyright (C) 2016 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License + */ + +package com.android.tv.dvr; + +import android.media.PlaybackParams; +import android.media.tv.TvContentRating; +import android.media.tv.TvInputManager; +import android.media.tv.TvTrackInfo; +import android.media.tv.TvView; +import android.media.session.PlaybackState; +import android.util.Log; + +import java.util.List; +import java.util.concurrent.TimeUnit; + +public class DvrPlayer { + private static final String TAG = "DvrPlayer"; + private static final boolean DEBUG = false; + + /** + * The max rewinding speed supported by DVR player. + */ + public static final int MAX_REWIND_SPEED = 256; + /** + * The max fast-forwarding speed supported by DVR player. + */ + public static final int MAX_FAST_FORWARD_SPEED = 256; + + private static final long SEEK_POSITION_MARGIN_MS = TimeUnit.SECONDS.toMillis(2); + private static final long REWIND_POSITION_MARGIN_MS = 32; // Workaround value. b/29994826 + + private RecordedProgram mProgram; + private long mInitialSeekPositionMs; + private final TvView mTvView; + private DvrPlayerCallback mCallback; + private AspectRatioChangedListener mAspectRatioChangedListener; + private ContentBlockedListener mContentBlockedListener; + private float mAspectRatio = Float.NaN; + private int mPlaybackState = PlaybackState.STATE_NONE; + private long mTimeShiftCurrentPositionMs; + private boolean mPauseOnPrepared; + private final PlaybackParams mPlaybackParams = new PlaybackParams(); + private final DvrPlayerCallback mEmptyCallback = new DvrPlayerCallback(); + private long mStartPositionMs = TvInputManager.TIME_SHIFT_INVALID_TIME; + private boolean mTimeShiftPlayAvailable; + + public static class DvrPlayerCallback { + /** + * Called when the playback position is changed. The normal updating frequency is + * around 1 sec., which is restricted to the implementation of + * {@link android.media.tv.TvInputService}. + */ + public void onPlaybackPositionChanged(long positionMs) { } + /** + * Called when the playback state or the playback speed is changed. + */ + public void onPlaybackStateChanged(int playbackState, int playbackSpeed) { } + /** + * Called when the playback toward the end. + */ + public void onPlaybackEnded() { } + } + + public interface AspectRatioChangedListener { + /** + * Called when the Video's aspect ratio is changed. + */ + void onAspectRatioChanged(float videoAspectRatio); + } + + public interface ContentBlockedListener { + /** + * Called when the Video's aspect ratio is changed. + */ + void onContentBlocked(TvContentRating rating); + } + + public DvrPlayer(TvView tvView) { + mTvView = tvView; + mPlaybackParams.setSpeed(1.0f); + setTvViewCallbacks(); + setCallback(null); + } + + /** + * Prepares playback. + * + * @param doPlay indicates DVR player do or do not start playback after media is prepared. + */ + public void prepare(boolean doPlay) throws IllegalStateException { + if (DEBUG) Log.d(TAG, "prepare()"); + if (mProgram == null) { + throw new IllegalStateException("Recorded program not set"); + } else if (mPlaybackState != PlaybackState.STATE_NONE) { + throw new IllegalStateException("Playback is already prepared"); + } + mTvView.timeShiftPlay(mProgram.getInputId(), mProgram.getUri()); + mPlaybackState = PlaybackState.STATE_CONNECTING; + mPauseOnPrepared = !doPlay; + mCallback.onPlaybackStateChanged(mPlaybackState, 1); + } + + /** + * Resumes playback. + */ + public void play() throws IllegalStateException { + if (DEBUG) Log.d(TAG, "play()"); + if (!isPlaybackPrepared()) { + throw new IllegalStateException("Recorded program not set or video not ready yet"); + } + switch (mPlaybackState) { + case PlaybackState.STATE_FAST_FORWARDING: + case PlaybackState.STATE_REWINDING: + setPlaybackSpeed(1); + break; + default: + mTvView.timeShiftResume(); + } + mPlaybackState = PlaybackState.STATE_PLAYING; + mCallback.onPlaybackStateChanged(mPlaybackState, 1); + } + + /** + * Pauses playback. + */ + public void pause() throws IllegalStateException { + if (DEBUG) Log.d(TAG, "pause()"); + if (!isPlaybackPrepared()) { + throw new IllegalStateException("Recorded program not set or playback not started yet"); + } + switch (mPlaybackState) { + case PlaybackState.STATE_FAST_FORWARDING: + case PlaybackState.STATE_REWINDING: + setPlaybackSpeed(1); + // falls through + case PlaybackState.STATE_PLAYING: + mTvView.timeShiftPause(); + mPlaybackState = PlaybackState.STATE_PAUSED; + break; + default: + break; + } + mCallback.onPlaybackStateChanged(mPlaybackState, 1); + } + + /** + * Fast-forwards playback with the given speed. If the given speed is larger than + * {@value #MAX_FAST_FORWARD_SPEED}, uses {@value #MAX_FAST_FORWARD_SPEED}. + */ + public void fastForward(int speed) throws IllegalStateException { + if (DEBUG) Log.d(TAG, "fastForward()"); + if (!isPlaybackPrepared()) { + throw new IllegalStateException("Recorded program not set or playback not started yet"); + } + if (speed <= 0) { + throw new IllegalArgumentException("Speed cannot be negative or 0"); + } + if (mTimeShiftCurrentPositionMs >= mProgram.getDurationMillis() - SEEK_POSITION_MARGIN_MS) { + return; + } + speed = Math.min(speed, MAX_FAST_FORWARD_SPEED); + if (DEBUG) Log.d(TAG, "Let's play with speed: " + speed); + setPlaybackSpeed(speed); + mPlaybackState = PlaybackState.STATE_FAST_FORWARDING; + mCallback.onPlaybackStateChanged(mPlaybackState, speed); + } + + /** + * Rewinds playback with the given speed. If the given speed is larger than + * {@value #MAX_REWIND_SPEED}, uses {@value #MAX_REWIND_SPEED}. + */ + public void rewind(int speed) throws IllegalStateException { + if (DEBUG) Log.d(TAG, "rewind()"); + if (!isPlaybackPrepared()) { + throw new IllegalStateException("Recorded program not set or playback not started yet"); + } + if (speed <= 0) { + throw new IllegalArgumentException("Speed cannot be negative or 0"); + } + if (mTimeShiftCurrentPositionMs <= REWIND_POSITION_MARGIN_MS) { + return; + } + speed = Math.min(speed, MAX_REWIND_SPEED); + if (DEBUG) Log.d(TAG, "Let's play with speed: " + speed); + setPlaybackSpeed(-speed); + mPlaybackState = PlaybackState.STATE_REWINDING; + mCallback.onPlaybackStateChanged(mPlaybackState, speed); + } + + /** + * Seeks playback to the specified position. + */ + public void seekTo(long positionMs) throws IllegalStateException { + if (DEBUG) Log.d(TAG, "seekTo()"); + if (!isPlaybackPrepared()) { + throw new IllegalStateException("Recorded program not set or playback not started yet"); + } + if (mProgram == null || mPlaybackState == PlaybackState.STATE_NONE) { + return; + } + positionMs = getRealSeekPosition(positionMs, SEEK_POSITION_MARGIN_MS); + if (DEBUG) Log.d(TAG, "Now: " + getPlaybackPosition() + ", shift to: " + positionMs); + mTvView.timeShiftSeekTo(positionMs + mStartPositionMs); + if (mPlaybackState == PlaybackState.STATE_FAST_FORWARDING || + mPlaybackState == PlaybackState.STATE_REWINDING) { + mPlaybackState = PlaybackState.STATE_PLAYING; + mTvView.timeShiftResume(); + mCallback.onPlaybackStateChanged(mPlaybackState, 1); + } + } + + /** + * Resets playback. + */ + public void reset() { + if (DEBUG) Log.d(TAG, "reset()"); + mCallback.onPlaybackStateChanged(PlaybackState.STATE_NONE, 1); + mPlaybackState = PlaybackState.STATE_NONE; + mTvView.reset(); + mTimeShiftPlayAvailable = false; + mStartPositionMs = TvInputManager.TIME_SHIFT_INVALID_TIME; + mTimeShiftCurrentPositionMs = 0; + mPlaybackParams.setSpeed(1.0f); + mProgram = null; + } + + /** + * Sets callbacks for playback. + */ + public void setCallback(DvrPlayerCallback callback) { + if (callback != null) { + mCallback = callback; + } else { + mCallback = mEmptyCallback; + } + } + + /** + * Sets listener to aspect ratio changing. + */ + public void setAspectRatioChangedListener(AspectRatioChangedListener listener) { + mAspectRatioChangedListener = listener; + } + + /** + * Sets listener to content blocking. + */ + public void setContentBlockedListener(ContentBlockedListener listener) { + mContentBlockedListener = listener; + } + + /** + * Sets recorded programs for playback. If the player is playing another program, stops it. + */ + public void setProgram(RecordedProgram program, long initialSeekPositionMs) { + if (mProgram != null && mProgram.equals(program)) { + return; + } + if (mPlaybackState != PlaybackState.STATE_NONE) { + reset(); + } + mInitialSeekPositionMs = initialSeekPositionMs; + mProgram = program; + } + + /** + * Returns the recorded program now playing. + */ + public RecordedProgram getProgram() { + return mProgram; + } + + /** + * Returns the currrent playback posistion in msecs. + */ + public long getPlaybackPosition() { + return mTimeShiftCurrentPositionMs; + } + + /** + * Returns the playback speed currently used. + */ + public int getPlaybackSpeed() { + return (int) mPlaybackParams.getSpeed(); + } + + /** + * Returns the playback state defined in {@link android.media.session.PlaybackState}. + */ + public int getPlaybackState() { + return mPlaybackState; + } + + /** + * Returns if playback of the recorded program is started. + */ + public boolean isPlaybackPrepared() { + return mPlaybackState != PlaybackState.STATE_NONE + && mPlaybackState != PlaybackState.STATE_CONNECTING; + } + + private void setPlaybackSpeed(int speed) { + mPlaybackParams.setSpeed(speed); + mTvView.timeShiftSetPlaybackParams(mPlaybackParams); + } + + private long getRealSeekPosition(long seekPositionMs, long endMarginMs) { + return Math.max(0, Math.min(seekPositionMs, mProgram.getDurationMillis() - endMarginMs)); + } + + private void setTvViewCallbacks() { + mTvView.setTimeShiftPositionCallback(new TvView.TimeShiftPositionCallback() { + @Override + public void onTimeShiftStartPositionChanged(String inputId, long timeMs) { + if (DEBUG) Log.d(TAG, "onTimeShiftStartPositionChanged:" + timeMs); + mStartPositionMs = timeMs; + if (mTimeShiftPlayAvailable) { + resumeToWatchedPositionIfNeeded(); + } + } + + @Override + public void onTimeShiftCurrentPositionChanged(String inputId, long timeMs) { + if (DEBUG) Log.d(TAG, "onTimeShiftCurrentPositionChanged: " + timeMs); + if (!mTimeShiftPlayAvailable) { + // Workaround of b/31436263 + return; + } + // Workaround of b/32211561, TIF won't report start position when TIS report + // its start position as 0. In that case, we have to do the prework of playback + // on the first time we get current position, and the start position should be 0 + // at that time. + if (mStartPositionMs == TvInputManager.TIME_SHIFT_INVALID_TIME) { + mStartPositionMs = 0; + resumeToWatchedPositionIfNeeded(); + } + timeMs -= mStartPositionMs; + if (mPlaybackState == PlaybackState.STATE_REWINDING + && timeMs <= REWIND_POSITION_MARGIN_MS) { + play(); + } else { + mTimeShiftCurrentPositionMs = getRealSeekPosition(timeMs, 0); + mCallback.onPlaybackPositionChanged(mTimeShiftCurrentPositionMs); + if (timeMs >= mProgram.getDurationMillis()) { + pause(); + mCallback.onPlaybackEnded(); + } + } + } + }); + mTvView.setCallback(new TvView.TvInputCallback() { + @Override + public void onTimeShiftStatusChanged(String inputId, int status) { + if (DEBUG) Log.d(TAG, "onTimeShiftStatusChanged:" + status); + if (status == TvInputManager.TIME_SHIFT_STATUS_AVAILABLE + && mPlaybackState == PlaybackState.STATE_CONNECTING) { + mTimeShiftPlayAvailable = true; + } + } + + @Override + public void onTrackSelected(String inputId, int type, String trackId) { + if (trackId == null || type != TvTrackInfo.TYPE_VIDEO + || mAspectRatioChangedListener == null) { + return; + } + List<TvTrackInfo> trackInfos = mTvView.getTracks(TvTrackInfo.TYPE_VIDEO); + if (trackInfos != null) { + for (TvTrackInfo trackInfo : trackInfos) { + if (trackInfo.getId().equals(trackId)) { + float videoAspectRatio = trackInfo.getVideoPixelAspectRatio() + * trackInfo.getVideoWidth() / trackInfo.getVideoHeight(); + if (DEBUG) Log.d(TAG, "Aspect Ratio: " + videoAspectRatio); + if (!Float.isNaN(videoAspectRatio) + && mAspectRatio != videoAspectRatio) { + mAspectRatioChangedListener + .onAspectRatioChanged(videoAspectRatio); + mAspectRatio = videoAspectRatio; + return; + } + } + } + } + } + + @Override + public void onContentBlocked(String inputId, TvContentRating rating) { + if (mContentBlockedListener != null) { + mContentBlockedListener.onContentBlocked(rating); + } + } + }); + } + + private void resumeToWatchedPositionIfNeeded() { + if (mInitialSeekPositionMs != TvInputManager.TIME_SHIFT_INVALID_TIME) { + mTvView.timeShiftSeekTo(getRealSeekPosition(mInitialSeekPositionMs, + SEEK_POSITION_MARGIN_MS) + mStartPositionMs); + mInitialSeekPositionMs = TvInputManager.TIME_SHIFT_INVALID_TIME; + } + if (mPauseOnPrepared) { + mTvView.timeShiftPause(); + mPlaybackState = PlaybackState.STATE_PAUSED; + mPauseOnPrepared = false; + } else { + mTvView.timeShiftResume(); + mPlaybackState = PlaybackState.STATE_PLAYING; + } + mCallback.onPlaybackStateChanged(mPlaybackState, 1); + } +}
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