Revert of media: Introduce Renderer interface and RendererImpl.

media/filters/renderer_impl.cc

Index: media/filters/renderer_impl.cc
diff --git a/media/filters/renderer_impl.cc b/media/filters/renderer_impl.cc
deleted file mode 100644
index 1dcbe1cb88aa705a4877d0a129a2ccbdd2348bba..0000000000000000000000000000000000000000
--- a/media/filters/renderer_impl.cc
+++ /dev/null
@@ -1,572 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "media/filters/renderer_impl.h"
-
-#include "base/bind.h"
-#include "base/callback.h"
-#include "base/callback_helpers.h"
-#include "base/compiler_specific.h"
-#include "base/location.h"
-#include "base/single_thread_task_runner.h"
-#include "media/base/audio_renderer.h"
-#include "media/base/demuxer.h"
-#include "media/base/filter_collection.h"
-#include "media/base/time_delta_interpolator.h"
-#include "media/base/time_source.h"
-#include "media/base/video_renderer.h"
-
-namespace media {
-
-RendererImpl::RendererImpl(
-    const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    Demuxer* demuxer,
-    scoped_ptr<AudioRenderer> audio_renderer,
-    scoped_ptr<VideoRenderer> video_renderer)
-    : state_(STATE_UNINITIALIZED),
-      task_runner_(task_runner),
-      demuxer_(demuxer),
-      audio_renderer_(audio_renderer.Pass()),
-      video_renderer_(video_renderer.Pass()),
-      time_source_(NULL),
-      audio_buffering_state_(BUFFERING_HAVE_NOTHING),
-      video_buffering_state_(BUFFERING_HAVE_NOTHING),
-      audio_ended_(false),
-      video_ended_(false),
-      underflow_disabled_for_testing_(false),
-      interpolator_(new TimeDeltaInterpolator(&default_tick_clock_)),
-      interpolation_state_(INTERPOLATION_STOPPED),
-      weak_factory_(this),
-      weak_this_(weak_factory_.GetWeakPtr()) {
-  DVLOG(1) << __FUNCTION__;
-  interpolator_->SetBounds(base::TimeDelta(), base::TimeDelta());
-}
-
-RendererImpl::~RendererImpl() {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  audio_renderer_.reset();
-  video_renderer_.reset();
-
-  FireAllPendingCallbacks();
-}
-
-void RendererImpl::Initialize(const PipelineStatusCB& init_cb,
-                              const StatisticsCB& statistics_cb,
-                              const base::Closure& ended_cb,
-                              const PipelineStatusCB& error_cb,
-                              const BufferingStateCB& buffering_state_cb,
-                              const TimeDeltaCB& get_duration_cb) {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_UNINITIALIZED) << state_;
-  DCHECK(!init_cb.is_null());
-  DCHECK(!statistics_cb.is_null());
-  DCHECK(!ended_cb.is_null());
-  DCHECK(!error_cb.is_null());
-  DCHECK(!buffering_state_cb.is_null());
-  DCHECK(!get_duration_cb.is_null());
-  DCHECK(demuxer_->GetStream(DemuxerStream::AUDIO) ||
-         demuxer_->GetStream(DemuxerStream::VIDEO));
-
-  statistics_cb_ = statistics_cb;
-  ended_cb_ = ended_cb;
-  error_cb_ = error_cb;
-  buffering_state_cb_ = buffering_state_cb;
-  get_duration_cb_ = get_duration_cb;
-
-  init_cb_ = init_cb;
-  state_ = STATE_INITIALIZING;
-  InitializeAudioRenderer();
-}
-
-void RendererImpl::Flush(const base::Closure& flush_cb) {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_PLAYING) << state_;
-  DCHECK(flush_cb_.is_null());
-
-  {
-    base::AutoLock auto_lock(interpolator_lock_);
-    PauseClockAndStopTicking_Locked();
-  }
-
-  flush_cb_ = flush_cb;
-  state_ = STATE_FLUSHING;
-  FlushAudioRenderer();
-}
-
-void RendererImpl::StartPlayingFrom(base::TimeDelta time) {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_PLAYING) << state_;
-
-  {
-    base::AutoLock auto_lock(interpolator_lock_);
-    interpolator_->SetBounds(time, time);
-  }
-
-  if (time_source_)
-    time_source_->SetMediaTime(time);
-  if (audio_renderer_)
-    audio_renderer_->StartPlaying();
-  if (video_renderer_)
-    video_renderer_->StartPlaying();
-}
-
-void RendererImpl::SetPlaybackRate(float playback_rate) {
-  DVLOG(2) << __FUNCTION__ << "(" << playback_rate << ")";
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  // Playback rate changes are only carried out while playing.
-  if (state_ != STATE_PLAYING)
-    return;
-
-  {
-    base::AutoLock auto_lock(interpolator_lock_);
-    interpolator_->SetPlaybackRate(playback_rate);
-  }
-
-  if (time_source_)
-    time_source_->SetPlaybackRate(playback_rate);
-}
-
-void RendererImpl::SetVolume(float volume) {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (audio_renderer_)
-    audio_renderer_->SetVolume(volume);
-}
-
-base::TimeDelta RendererImpl::GetMediaTime() {
-  // No BelongsToCurrentThread() checking because this can be called from other
-  // threads.
-  base::AutoLock auto_lock(interpolator_lock_);
-  return interpolator_->GetInterpolatedTime();
-}
-
-bool RendererImpl::HasAudio() {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  return audio_renderer_ != NULL;
-}
-
-bool RendererImpl::HasVideo() {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  return video_renderer_ != NULL;
-}
-
-void RendererImpl::SetCdm(MediaKeys* cdm) {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  // TODO(xhwang): Explore to possibility to move CDM setting from
-  // WebMediaPlayerImpl to this class. See http://crbug.com/401264
-  NOTREACHED();
-}
-
-void RendererImpl::DisableUnderflowForTesting() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_UNINITIALIZED);
-
-  underflow_disabled_for_testing_ = true;
-}
-
-void RendererImpl::SetTimeDeltaInterpolatorForTesting(
-    TimeDeltaInterpolator* interpolator) {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_UNINITIALIZED);
-
-  interpolator_.reset(interpolator);
-}
-
-base::TimeDelta RendererImpl::GetMediaDuration() {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  return get_duration_cb_.Run();
-}
-
-void RendererImpl::InitializeAudioRenderer() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_INITIALIZING) << state_;
-  DCHECK(!init_cb_.is_null());
-
-  PipelineStatusCB done_cb =
-      base::Bind(&RendererImpl::OnAudioRendererInitializeDone, weak_this_);
-
-  if (!demuxer_->GetStream(DemuxerStream::AUDIO)) {
-    audio_renderer_.reset();
-    task_runner_->PostTask(FROM_HERE, base::Bind(done_cb, PIPELINE_OK));
-    return;
-  }
-
-  audio_renderer_->Initialize(
-      demuxer_->GetStream(DemuxerStream::AUDIO),
-      done_cb,
-      base::Bind(&RendererImpl::OnUpdateStatistics, weak_this_),
-      base::Bind(&RendererImpl::OnAudioTimeUpdate, weak_this_),
-      base::Bind(&RendererImpl::OnBufferingStateChanged, weak_this_,
-                 &audio_buffering_state_),
-      base::Bind(&RendererImpl::OnAudioRendererEnded, weak_this_),
-      base::Bind(&RendererImpl::OnError, weak_this_));
-}
-
-void RendererImpl::OnAudioRendererInitializeDone(PipelineStatus status) {
-  DVLOG(2) << __FUNCTION__ << ": " << status;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_INITIALIZING) << state_;
-  DCHECK(!init_cb_.is_null());
-
-  if (status != PIPELINE_OK) {
-    audio_renderer_.reset();
-    state_ = STATE_ERROR;
-    base::ResetAndReturn(&init_cb_).Run(status);
-    return;
-  }
-
-  if (audio_renderer_)
-    time_source_ = audio_renderer_->GetTimeSource();
-
-  InitializeVideoRenderer();
-}
-
-void RendererImpl::InitializeVideoRenderer() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_INITIALIZING) << state_;
-  DCHECK(!init_cb_.is_null());
-
-  PipelineStatusCB done_cb =
-      base::Bind(&RendererImpl::OnVideoRendererInitializeDone, weak_this_);
-
-  if (!demuxer_->GetStream(DemuxerStream::VIDEO)) {
-    video_renderer_.reset();
-    task_runner_->PostTask(FROM_HERE, base::Bind(done_cb, PIPELINE_OK));
-    return;
-  }
-
-  video_renderer_->Initialize(
-      demuxer_->GetStream(DemuxerStream::VIDEO),
-      demuxer_->GetLiveness() == Demuxer::LIVENESS_LIVE,
-      done_cb,
-      base::Bind(&RendererImpl::OnUpdateStatistics, weak_this_),
-      base::Bind(&RendererImpl::OnVideoTimeUpdate, weak_this_),
-      base::Bind(&RendererImpl::OnBufferingStateChanged, weak_this_,
-                 &video_buffering_state_),
-      base::Bind(&RendererImpl::OnVideoRendererEnded, weak_this_),
-      base::Bind(&RendererImpl::OnError, weak_this_),
-      base::Bind(&RendererImpl::GetMediaTime, base::Unretained(this)),
-      base::Bind(&RendererImpl::GetMediaDuration, base::Unretained(this)));
-}
-
-void RendererImpl::OnVideoRendererInitializeDone(PipelineStatus status) {
-  DVLOG(2) << __FUNCTION__ << ": " << status;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_INITIALIZING) << state_;
-  DCHECK(!init_cb_.is_null());
-
-  if (status != PIPELINE_OK) {
-    audio_renderer_.reset();
-    video_renderer_.reset();
-    state_ = STATE_ERROR;
-    base::ResetAndReturn(&init_cb_).Run(status);
-    return;
-  }
-
-  state_ = STATE_PLAYING;
-  DCHECK(audio_renderer_ || video_renderer_);
-  base::ResetAndReturn(&init_cb_).Run(PIPELINE_OK);
-}
-
-void RendererImpl::FlushAudioRenderer() {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_FLUSHING) << state_;
-  DCHECK(!flush_cb_.is_null());
-
-  if (!audio_renderer_) {
-    OnAudioRendererFlushDone();
-    return;
-  }
-
-  audio_renderer_->Flush(
-      base::Bind(&RendererImpl::OnAudioRendererFlushDone, weak_this_));
-}
-
-void RendererImpl::OnAudioRendererFlushDone() {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (state_ == STATE_ERROR) {
-    DCHECK(flush_cb_.is_null());
-    return;
-  }
-
-  DCHECK_EQ(state_, STATE_FLUSHING) << state_;
-  DCHECK(!flush_cb_.is_null());
-
-  DCHECK_EQ(audio_buffering_state_, BUFFERING_HAVE_NOTHING);
-  audio_ended_ = false;
-  FlushVideoRenderer();
-}
-
-void RendererImpl::FlushVideoRenderer() {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_FLUSHING) << state_;
-  DCHECK(!flush_cb_.is_null());
-
-  if (!video_renderer_) {
-    OnVideoRendererFlushDone();
-    return;
-  }
-
-  video_renderer_->Flush(
-      base::Bind(&RendererImpl::OnVideoRendererFlushDone, weak_this_));
-}
-
-void RendererImpl::OnVideoRendererFlushDone() {
-  DVLOG(1) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (state_ == STATE_ERROR) {
-    DCHECK(flush_cb_.is_null());
-    return;
-  }
-
-  DCHECK_EQ(state_, STATE_FLUSHING) << state_;
-  DCHECK(!flush_cb_.is_null());
-
-  DCHECK_EQ(video_buffering_state_, BUFFERING_HAVE_NOTHING);
-  video_ended_ = false;
-  state_ = STATE_PLAYING;
-  base::ResetAndReturn(&flush_cb_).Run();
-}
-
-void RendererImpl::OnAudioTimeUpdate(base::TimeDelta time,
-                                     base::TimeDelta max_time) {
-  DVLOG(3) << __FUNCTION__ << "(" << time.InMilliseconds()
-           << ", " << max_time.InMilliseconds() << ")";
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_LE(time.InMicroseconds(), max_time.InMicroseconds());
-
-  base::AutoLock auto_lock(interpolator_lock_);
-
-  if (interpolation_state_ == INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE &&
-      time < interpolator_->GetInterpolatedTime()) {
-    return;
-  }
-
-  if (state_ == STATE_FLUSHING)
-    return;
-
-  interpolator_->SetBounds(time, max_time);
-  StartClockIfWaitingForTimeUpdate_Locked();
-}
-
-void RendererImpl::OnVideoTimeUpdate(base::TimeDelta max_time) {
-  DVLOG(3) << __FUNCTION__ << "(" << max_time.InMilliseconds() << ")";
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (audio_renderer_)
-    return;
-
-  if (state_ == STATE_FLUSHING)
-    return;
-
-  base::AutoLock auto_lock(interpolator_lock_);
-  DCHECK_NE(interpolation_state_, INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE);
-  interpolator_->SetUpperBound(max_time);
-}
-
-void RendererImpl::OnUpdateStatistics(const PipelineStatistics& stats) {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  statistics_cb_.Run(stats);
-}
-
-void RendererImpl::OnBufferingStateChanged(BufferingState* buffering_state,
-                                           BufferingState new_buffering_state) {
-  DVLOG(2) << __FUNCTION__ << "(" << *buffering_state << ", "
-           << new_buffering_state << ") "
-           << (buffering_state == &audio_buffering_state_ ? "audio" : "video");
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  bool was_waiting_for_enough_data = WaitingForEnoughData();
-
-  *buffering_state = new_buffering_state;
-
-  // Disable underflow by ignoring updates that renderers have ran out of data.
-  if (state_ == STATE_PLAYING && underflow_disabled_for_testing_ &&
-      interpolation_state_ != INTERPOLATION_STOPPED) {
-    DVLOG(2) << "Update ignored because underflow is disabled for testing.";
-    return;
-  }
-
-  // Renderer underflowed.
-  if (!was_waiting_for_enough_data && WaitingForEnoughData()) {
-    PausePlayback();
-
-    // TODO(scherkus): Fire BUFFERING_HAVE_NOTHING callback to alert clients of
-    // underflow state http://crbug.com/144683
-    return;
-  }
-
-  // Renderer prerolled.
-  if (was_waiting_for_enough_data && !WaitingForEnoughData()) {
-    StartPlayback();
-    buffering_state_cb_.Run(BUFFERING_HAVE_ENOUGH);
-    return;
-  }
-}
-
-bool RendererImpl::WaitingForEnoughData() const {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  if (state_ != STATE_PLAYING)
-    return false;
-  if (audio_renderer_ && audio_buffering_state_ != BUFFERING_HAVE_ENOUGH)
-    return true;
-  if (video_renderer_ && video_buffering_state_ != BUFFERING_HAVE_ENOUGH)
-    return true;
-  return false;
-}
-
-void RendererImpl::PausePlayback() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_PLAYING);
-  DCHECK(WaitingForEnoughData());
-
-  base::AutoLock auto_lock(interpolator_lock_);
-  PauseClockAndStopTicking_Locked();
-}
-
-void RendererImpl::StartPlayback() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_EQ(state_, STATE_PLAYING);
-  DCHECK_EQ(interpolation_state_, INTERPOLATION_STOPPED);
-  DCHECK(!WaitingForEnoughData());
-
-  if (time_source_) {
-    // We use audio stream to update the interpolator. So if there is such a
-    // stream, we pause the interpolator until we receive a valid time update.
-    base::AutoLock auto_lock(interpolator_lock_);
-    interpolation_state_ = INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE;
-    time_source_->StartTicking();
-  } else {
-    base::AutoLock auto_lock(interpolator_lock_);
-    interpolation_state_ = INTERPOLATION_STARTED;
-    interpolator_->SetUpperBound(get_duration_cb_.Run());
-    interpolator_->StartInterpolating();
-  }
-}
-
-void RendererImpl::PauseClockAndStopTicking_Locked() {
-  DVLOG(2) << __FUNCTION__;
-  interpolator_lock_.AssertAcquired();
-  switch (interpolation_state_) {
-    case INTERPOLATION_STOPPED:
-      return;
-
-    case INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE:
-      time_source_->StopTicking();
-      break;
-
-    case INTERPOLATION_STARTED:
-      if (time_source_)
-        time_source_->StopTicking();
-      interpolator_->StopInterpolating();
-      break;
-  }
-
-  interpolation_state_ = INTERPOLATION_STOPPED;
-}
-
-void RendererImpl::StartClockIfWaitingForTimeUpdate_Locked() {
-  interpolator_lock_.AssertAcquired();
-  if (interpolation_state_ != INTERPOLATION_WAITING_FOR_AUDIO_TIME_UPDATE)
-    return;
-
-  interpolation_state_ = INTERPOLATION_STARTED;
-  interpolator_->StartInterpolating();
-}
-
-void RendererImpl::OnAudioRendererEnded() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (state_ != STATE_PLAYING)
-    return;
-
-  DCHECK(!audio_ended_);
-  audio_ended_ = true;
-
-  // Start clock since there is no more audio to trigger clock updates.
-  {
-    base::AutoLock auto_lock(interpolator_lock_);
-    interpolator_->SetUpperBound(get_duration_cb_.Run());
-    StartClockIfWaitingForTimeUpdate_Locked();
-  }
-
-  RunEndedCallbackIfNeeded();
-}
-
-void RendererImpl::OnVideoRendererEnded() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (state_ != STATE_PLAYING)
-    return;
-
-  DCHECK(!video_ended_);
-  video_ended_ = true;
-
-  RunEndedCallbackIfNeeded();
-}
-
-void RendererImpl::RunEndedCallbackIfNeeded() {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (audio_renderer_ && !audio_ended_)
-    return;
-
-  if (video_renderer_ && !video_ended_)
-    return;
-
-  {
-    base::AutoLock auto_lock(interpolator_lock_);
-    PauseClockAndStopTicking_Locked();
-    base::TimeDelta duration = get_duration_cb_.Run();
-    interpolator_->SetBounds(duration, duration);
-  }
-
-  ended_cb_.Run();
-}
-
-void RendererImpl::OnError(PipelineStatus error) {
-  DVLOG(2) << __FUNCTION__;
-  DCHECK(task_runner_->BelongsToCurrentThread());
-  DCHECK_NE(PIPELINE_OK, error) << "PIPELINE_OK isn't an error!";
-
-  state_ = STATE_ERROR;
-
-  // Pipeline will destroy |this| as the result of error.
-  base::ResetAndReturn(&error_cb_).Run(error);
-
-  FireAllPendingCallbacks();
-}
-
-void RendererImpl::FireAllPendingCallbacks() {
-  DCHECK(task_runner_->BelongsToCurrentThread());
-
-  if (!init_cb_.is_null())
-    base::ResetAndReturn(&init_cb_).Run(PIPELINE_ERROR_ABORT);
-
-  if (!flush_cb_.is_null())
-    base::ResetAndReturn(&flush_cb_).Run();
-}
-
-}  // namespace media