| // Copyright (c) 2012 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/base/pipeline.h" |
| |
| #include <algorithm> |
| |
| #include "base/bind.h" |
| #include "base/callback.h" |
| #include "base/callback_helpers.h" |
| #include "base/compiler_specific.h" |
| #include "base/message_loop/message_loop.h" |
| #include "base/metrics/histogram.h" |
| #include "base/stl_util.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_util.h" |
| #include "base/synchronization/condition_variable.h" |
| #include "media/base/audio_decoder.h" |
| #include "media/base/audio_renderer.h" |
| #include "media/base/clock.h" |
| #include "media/base/filter_collection.h" |
| #include "media/base/media_log.h" |
| #include "media/base/text_renderer.h" |
| #include "media/base/text_track_config.h" |
| #include "media/base/video_decoder.h" |
| #include "media/base/video_decoder_config.h" |
| #include "media/base/video_renderer.h" |
| |
| using base::TimeDelta; |
| |
| namespace media { |
| |
| Pipeline::Pipeline(const scoped_refptr<base::MessageLoopProxy>& message_loop, |
| MediaLog* media_log) |
| : message_loop_(message_loop), |
| media_log_(media_log), |
| running_(false), |
| did_loading_progress_(false), |
| total_bytes_(0), |
| natural_size_(0, 0), |
| volume_(1.0f), |
| playback_rate_(0.0f), |
| clock_(new Clock(&default_tick_clock_)), |
| waiting_for_clock_update_(false), |
| status_(PIPELINE_OK), |
| has_audio_(false), |
| has_video_(false), |
| state_(kCreated), |
| audio_ended_(false), |
| video_ended_(false), |
| text_ended_(false), |
| audio_disabled_(false), |
| demuxer_(NULL), |
| creation_time_(default_tick_clock_.NowTicks()) { |
| media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(kCreated)); |
| media_log_->AddEvent( |
| media_log_->CreateEvent(MediaLogEvent::PIPELINE_CREATED)); |
| } |
| |
| Pipeline::~Pipeline() { |
| DCHECK(thread_checker_.CalledOnValidThread()) |
| << "Pipeline must be destroyed on same thread that created it"; |
| DCHECK(!running_) << "Stop() must complete before destroying object"; |
| DCHECK(stop_cb_.is_null()); |
| DCHECK(seek_cb_.is_null()); |
| |
| media_log_->AddEvent( |
| media_log_->CreateEvent(MediaLogEvent::PIPELINE_DESTROYED)); |
| } |
| |
| void Pipeline::Start(scoped_ptr<FilterCollection> collection, |
| const base::Closure& ended_cb, |
| const PipelineStatusCB& error_cb, |
| const PipelineStatusCB& seek_cb, |
| const BufferingStateCB& buffering_state_cb, |
| const base::Closure& duration_change_cb) { |
| base::AutoLock auto_lock(lock_); |
| CHECK(!running_) << "Media pipeline is already running"; |
| DCHECK(!buffering_state_cb.is_null()); |
| |
| running_ = true; |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::StartTask, base::Unretained(this), base::Passed(&collection), |
| ended_cb, error_cb, seek_cb, buffering_state_cb, duration_change_cb)); |
| } |
| |
| void Pipeline::Stop(const base::Closure& stop_cb) { |
| base::AutoLock auto_lock(lock_); |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::StopTask, base::Unretained(this), stop_cb)); |
| } |
| |
| void Pipeline::Seek(TimeDelta time, const PipelineStatusCB& seek_cb) { |
| base::AutoLock auto_lock(lock_); |
| if (!running_) { |
| NOTREACHED() << "Media pipeline isn't running"; |
| return; |
| } |
| |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::SeekTask, base::Unretained(this), time, seek_cb)); |
| } |
| |
| bool Pipeline::IsRunning() const { |
| base::AutoLock auto_lock(lock_); |
| return running_; |
| } |
| |
| bool Pipeline::HasAudio() const { |
| base::AutoLock auto_lock(lock_); |
| return has_audio_; |
| } |
| |
| bool Pipeline::HasVideo() const { |
| base::AutoLock auto_lock(lock_); |
| return has_video_; |
| } |
| |
| float Pipeline::GetPlaybackRate() const { |
| base::AutoLock auto_lock(lock_); |
| return playback_rate_; |
| } |
| |
| void Pipeline::SetPlaybackRate(float playback_rate) { |
| if (playback_rate < 0.0f) |
| return; |
| |
| base::AutoLock auto_lock(lock_); |
| playback_rate_ = playback_rate; |
| if (running_) { |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::PlaybackRateChangedTask, base::Unretained(this), |
| playback_rate)); |
| } |
| } |
| |
| float Pipeline::GetVolume() const { |
| base::AutoLock auto_lock(lock_); |
| return volume_; |
| } |
| |
| void Pipeline::SetVolume(float volume) { |
| if (volume < 0.0f || volume > 1.0f) |
| return; |
| |
| base::AutoLock auto_lock(lock_); |
| volume_ = volume; |
| if (running_) { |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::VolumeChangedTask, base::Unretained(this), volume)); |
| } |
| } |
| |
| TimeDelta Pipeline::GetMediaTime() const { |
| base::AutoLock auto_lock(lock_); |
| return clock_->Elapsed(); |
| } |
| |
| Ranges<TimeDelta> Pipeline::GetBufferedTimeRanges() { |
| base::AutoLock auto_lock(lock_); |
| Ranges<TimeDelta> time_ranges; |
| for (size_t i = 0; i < buffered_time_ranges_.size(); ++i) { |
| time_ranges.Add(buffered_time_ranges_.start(i), |
| buffered_time_ranges_.end(i)); |
| } |
| if (clock_->Duration() == TimeDelta() || total_bytes_ == 0) |
| return time_ranges; |
| for (size_t i = 0; i < buffered_byte_ranges_.size(); ++i) { |
| TimeDelta start = TimeForByteOffset_Locked(buffered_byte_ranges_.start(i)); |
| TimeDelta end = TimeForByteOffset_Locked(buffered_byte_ranges_.end(i)); |
| // Cap approximated buffered time at the length of the video. |
| end = std::min(end, clock_->Duration()); |
| time_ranges.Add(start, end); |
| } |
| |
| return time_ranges; |
| } |
| |
| TimeDelta Pipeline::GetMediaDuration() const { |
| base::AutoLock auto_lock(lock_); |
| return clock_->Duration(); |
| } |
| |
| int64 Pipeline::GetTotalBytes() const { |
| base::AutoLock auto_lock(lock_); |
| return total_bytes_; |
| } |
| |
| void Pipeline::GetNaturalVideoSize(gfx::Size* out_size) const { |
| CHECK(out_size); |
| base::AutoLock auto_lock(lock_); |
| *out_size = natural_size_; |
| } |
| |
| bool Pipeline::DidLoadingProgress() const { |
| base::AutoLock auto_lock(lock_); |
| bool ret = did_loading_progress_; |
| did_loading_progress_ = false; |
| return ret; |
| } |
| |
| PipelineStatistics Pipeline::GetStatistics() const { |
| base::AutoLock auto_lock(lock_); |
| return statistics_; |
| } |
| |
| void Pipeline::SetClockForTesting(Clock* clock) { |
| clock_.reset(clock); |
| } |
| |
| void Pipeline::SetErrorForTesting(PipelineStatus status) { |
| SetError(status); |
| } |
| |
| void Pipeline::SetState(State next_state) { |
| if (state_ != kStarted && next_state == kStarted && |
| !creation_time_.is_null()) { |
| UMA_HISTOGRAM_TIMES("Media.TimeToPipelineStarted", |
| default_tick_clock_.NowTicks() - creation_time_); |
| creation_time_ = base::TimeTicks(); |
| } |
| |
| DVLOG(2) << GetStateString(state_) << " -> " << GetStateString(next_state); |
| |
| state_ = next_state; |
| media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(next_state)); |
| } |
| |
| #define RETURN_STRING(state) case state: return #state; |
| |
| const char* Pipeline::GetStateString(State state) { |
| switch (state) { |
| RETURN_STRING(kCreated); |
| RETURN_STRING(kInitDemuxer); |
| RETURN_STRING(kInitAudioRenderer); |
| RETURN_STRING(kInitVideoRenderer); |
| RETURN_STRING(kInitPrerolling); |
| RETURN_STRING(kSeeking); |
| RETURN_STRING(kStarting); |
| RETURN_STRING(kStarted); |
| RETURN_STRING(kStopping); |
| RETURN_STRING(kStopped); |
| } |
| NOTREACHED(); |
| return "INVALID"; |
| } |
| |
| #undef RETURN_STRING |
| |
| Pipeline::State Pipeline::GetNextState() const { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(stop_cb_.is_null()) |
| << "State transitions don't happen when stopping"; |
| DCHECK_EQ(status_, PIPELINE_OK) |
| << "State transitions don't happen when there's an error: " << status_; |
| |
| switch (state_) { |
| case kCreated: |
| return kInitDemuxer; |
| |
| case kInitDemuxer: |
| if (demuxer_->GetStream(DemuxerStream::AUDIO)) |
| return kInitAudioRenderer; |
| if (demuxer_->GetStream(DemuxerStream::VIDEO)) |
| return kInitVideoRenderer; |
| return kInitPrerolling; |
| |
| case kInitAudioRenderer: |
| if (demuxer_->GetStream(DemuxerStream::VIDEO)) |
| return kInitVideoRenderer; |
| return kInitPrerolling; |
| |
| case kInitVideoRenderer: |
| return kInitPrerolling; |
| |
| case kInitPrerolling: |
| return kStarting; |
| |
| case kSeeking: |
| return kStarting; |
| |
| case kStarting: |
| return kStarted; |
| |
| case kStarted: |
| case kStopping: |
| case kStopped: |
| break; |
| } |
| NOTREACHED() << "State has no transition: " << state_; |
| return state_; |
| } |
| |
| void Pipeline::OnDemuxerError(PipelineStatus error) { |
| SetError(error); |
| } |
| |
| void Pipeline::AddTextStream(DemuxerStream* text_stream, |
| const TextTrackConfig& config) { |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::AddTextStreamTask, base::Unretained(this), |
| text_stream, config)); |
| } |
| |
| void Pipeline::RemoveTextStream(DemuxerStream* text_stream) { |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::RemoveTextStreamTask, base::Unretained(this), |
| text_stream)); |
| } |
| |
| void Pipeline::SetError(PipelineStatus error) { |
| DCHECK(IsRunning()); |
| DCHECK_NE(PIPELINE_OK, error); |
| VLOG(1) << "Media pipeline error: " << error; |
| |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::ErrorChangedTask, base::Unretained(this), error)); |
| |
| media_log_->AddEvent(media_log_->CreatePipelineErrorEvent(error)); |
| } |
| |
| void Pipeline::OnAudioDisabled() { |
| DCHECK(IsRunning()); |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::AudioDisabledTask, base::Unretained(this))); |
| media_log_->AddEvent( |
| media_log_->CreateEvent(MediaLogEvent::AUDIO_RENDERER_DISABLED)); |
| } |
| |
| void Pipeline::OnAudioTimeUpdate(TimeDelta time, TimeDelta max_time) { |
| DCHECK_LE(time.InMicroseconds(), max_time.InMicroseconds()); |
| DCHECK(IsRunning()); |
| base::AutoLock auto_lock(lock_); |
| |
| if (!has_audio_) |
| return; |
| if (waiting_for_clock_update_ && time < clock_->Elapsed()) |
| return; |
| |
| // TODO(scherkus): |state_| should only be accessed on pipeline thread, see |
| // http://crbug.com/137973 |
| if (state_ == kSeeking) |
| return; |
| |
| clock_->SetTime(time, max_time); |
| StartClockIfWaitingForTimeUpdate_Locked(); |
| } |
| |
| void Pipeline::OnVideoTimeUpdate(TimeDelta max_time) { |
| DCHECK(IsRunning()); |
| base::AutoLock auto_lock(lock_); |
| |
| if (has_audio_) |
| return; |
| |
| // TODO(scherkus): |state_| should only be accessed on pipeline thread, see |
| // http://crbug.com/137973 |
| if (state_ == kSeeking) |
| return; |
| |
| DCHECK(!waiting_for_clock_update_); |
| clock_->SetMaxTime(max_time); |
| } |
| |
| void Pipeline::SetDuration(TimeDelta duration) { |
| DCHECK(IsRunning()); |
| media_log_->AddEvent( |
| media_log_->CreateTimeEvent( |
| MediaLogEvent::DURATION_SET, "duration", duration)); |
| UMA_HISTOGRAM_LONG_TIMES("Media.Duration", duration); |
| |
| base::AutoLock auto_lock(lock_); |
| clock_->SetDuration(duration); |
| if (!duration_change_cb_.is_null()) |
| duration_change_cb_.Run(); |
| } |
| |
| void Pipeline::SetTotalBytes(int64 total_bytes) { |
| DCHECK(IsRunning()); |
| media_log_->AddEvent( |
| media_log_->CreateStringEvent( |
| MediaLogEvent::TOTAL_BYTES_SET, "total_bytes", |
| base::Int64ToString(total_bytes))); |
| int64 total_mbytes = total_bytes >> 20; |
| if (total_mbytes > kint32max) |
| total_mbytes = kint32max; |
| UMA_HISTOGRAM_CUSTOM_COUNTS( |
| "Media.TotalMBytes", static_cast<int32>(total_mbytes), 1, kint32max, 50); |
| |
| base::AutoLock auto_lock(lock_); |
| total_bytes_ = total_bytes; |
| } |
| |
| TimeDelta Pipeline::TimeForByteOffset_Locked(int64 byte_offset) const { |
| lock_.AssertAcquired(); |
| // Use floating point to avoid potential overflow when using 64 bit integers. |
| double time_offset_in_ms = clock_->Duration().InMilliseconds() * |
| (static_cast<double>(byte_offset) / total_bytes_); |
| TimeDelta time_offset(TimeDelta::FromMilliseconds( |
| static_cast<int64>(time_offset_in_ms))); |
| // Since the byte->time calculation is approximate, fudge the beginning & |
| // ending areas to look better. |
| TimeDelta epsilon = clock_->Duration() / 100; |
| if (time_offset < epsilon) |
| return TimeDelta(); |
| if (time_offset + epsilon > clock_->Duration()) |
| return clock_->Duration(); |
| return time_offset; |
| } |
| |
| void Pipeline::OnStateTransition(PipelineStatus status) { |
| // Force post to process state transitions after current execution frame. |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::StateTransitionTask, base::Unretained(this), status)); |
| } |
| |
| void Pipeline::StateTransitionTask(PipelineStatus status) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| // No-op any state transitions if we're stopping. |
| if (state_ == kStopping || state_ == kStopped) |
| return; |
| |
| // Preserve existing abnormal status, otherwise update based on the result of |
| // the previous operation. |
| status_ = (status_ != PIPELINE_OK ? status_ : status); |
| |
| if (status_ != PIPELINE_OK) { |
| ErrorChangedTask(status_); |
| return; |
| } |
| |
| // Guard against accidentally clearing |pending_callbacks_| for states that |
| // use it as well as states that should not be using it. |
| // |
| // TODO(scherkus): Make every state transition use |pending_callbacks_|. |
| DCHECK_EQ(pending_callbacks_.get() != NULL, |
| (state_ == kInitPrerolling || state_ == kStarting || |
| state_ == kSeeking)); |
| pending_callbacks_.reset(); |
| |
| PipelineStatusCB done_cb = base::Bind( |
| &Pipeline::OnStateTransition, base::Unretained(this)); |
| |
| // Switch states, performing any entrance actions for the new state as well. |
| SetState(GetNextState()); |
| switch (state_) { |
| case kInitDemuxer: |
| return InitializeDemuxer(done_cb); |
| |
| case kInitAudioRenderer: |
| return InitializeAudioRenderer(done_cb); |
| |
| case kInitVideoRenderer: |
| return InitializeVideoRenderer(done_cb); |
| |
| case kInitPrerolling: |
| filter_collection_.reset(); |
| { |
| base::AutoLock l(lock_); |
| // We do not want to start the clock running. We only want to set the |
| // base media time so our timestamp calculations will be correct. |
| clock_->SetTime(demuxer_->GetStartTime(), demuxer_->GetStartTime()); |
| |
| // TODO(scherkus): |has_audio_| should be true no matter what -- |
| // otherwise people with muted/disabled sound cards will make our |
| // default controls look as if every video doesn't contain an audio |
| // track. |
| has_audio_ = audio_renderer_ != NULL && !audio_disabled_; |
| has_video_ = video_renderer_ != NULL; |
| } |
| if (!audio_renderer_ && !video_renderer_) { |
| done_cb.Run(PIPELINE_ERROR_COULD_NOT_RENDER); |
| return; |
| } |
| |
| buffering_state_cb_.Run(kHaveMetadata); |
| |
| return DoInitialPreroll(done_cb); |
| |
| case kStarting: |
| return DoPlay(done_cb); |
| |
| case kStarted: |
| { |
| base::AutoLock l(lock_); |
| // We use audio stream to update the clock. So if there is such a |
| // stream, we pause the clock until we receive a valid timestamp. |
| waiting_for_clock_update_ = true; |
| if (!has_audio_) { |
| clock_->SetMaxTime(clock_->Duration()); |
| StartClockIfWaitingForTimeUpdate_Locked(); |
| } |
| } |
| |
| DCHECK(!seek_cb_.is_null()); |
| DCHECK_EQ(status_, PIPELINE_OK); |
| |
| // Fire canplaythrough immediately after playback begins because of |
| // crbug.com/106480. |
| // TODO(vrk): set ready state to HaveFutureData when bug above is fixed. |
| buffering_state_cb_.Run(kPrerollCompleted); |
| return base::ResetAndReturn(&seek_cb_).Run(PIPELINE_OK); |
| |
| case kStopping: |
| case kStopped: |
| case kCreated: |
| case kSeeking: |
| NOTREACHED() << "State has no transition: " << state_; |
| return; |
| } |
| } |
| |
| // Note that the usage of base::Unretained() with the audio/video renderers |
| // in the following DoXXX() functions is considered safe as they are owned by |
| // |pending_callbacks_| and share the same lifetime. |
| // |
| // That being said, deleting the renderers while keeping |pending_callbacks_| |
| // running on the media thread would result in crashes. |
| void Pipeline::DoInitialPreroll(const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(!pending_callbacks_.get()); |
| SerialRunner::Queue bound_fns; |
| |
| base::TimeDelta seek_timestamp = demuxer_->GetStartTime(); |
| |
| // Preroll renderers. |
| if (audio_renderer_) { |
| bound_fns.Push(base::Bind( |
| &AudioRenderer::Preroll, base::Unretained(audio_renderer_.get()), |
| seek_timestamp)); |
| } |
| |
| if (video_renderer_) { |
| bound_fns.Push(base::Bind( |
| &VideoRenderer::Preroll, base::Unretained(video_renderer_.get()), |
| seek_timestamp)); |
| } |
| |
| pending_callbacks_ = SerialRunner::Run(bound_fns, done_cb); |
| } |
| |
| void Pipeline::DoSeek( |
| base::TimeDelta seek_timestamp, |
| const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(!pending_callbacks_.get()); |
| SerialRunner::Queue bound_fns; |
| |
| // Pause. |
| if (audio_renderer_) { |
| bound_fns.Push(base::Bind( |
| &AudioRenderer::Pause, base::Unretained(audio_renderer_.get()))); |
| } |
| if (video_renderer_) { |
| bound_fns.Push(base::Bind( |
| &VideoRenderer::Pause, base::Unretained(video_renderer_.get()))); |
| } |
| if (text_renderer_) { |
| bound_fns.Push(base::Bind( |
| &TextRenderer::Pause, base::Unretained(text_renderer_.get()))); |
| } |
| |
| // Flush. |
| if (audio_renderer_) { |
| bound_fns.Push(base::Bind( |
| &AudioRenderer::Flush, base::Unretained(audio_renderer_.get()))); |
| } |
| if (video_renderer_) { |
| bound_fns.Push(base::Bind( |
| &VideoRenderer::Flush, base::Unretained(video_renderer_.get()))); |
| } |
| if (text_renderer_) { |
| bound_fns.Push(base::Bind( |
| &TextRenderer::Flush, base::Unretained(text_renderer_.get()))); |
| } |
| |
| // Seek demuxer. |
| bound_fns.Push(base::Bind( |
| &Demuxer::Seek, base::Unretained(demuxer_), seek_timestamp)); |
| |
| // Preroll renderers. |
| if (audio_renderer_) { |
| bound_fns.Push(base::Bind( |
| &AudioRenderer::Preroll, base::Unretained(audio_renderer_.get()), |
| seek_timestamp)); |
| } |
| |
| if (video_renderer_) { |
| bound_fns.Push(base::Bind( |
| &VideoRenderer::Preroll, base::Unretained(video_renderer_.get()), |
| seek_timestamp)); |
| } |
| |
| pending_callbacks_ = SerialRunner::Run(bound_fns, done_cb); |
| } |
| |
| void Pipeline::DoPlay(const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(!pending_callbacks_.get()); |
| SerialRunner::Queue bound_fns; |
| |
| PlaybackRateChangedTask(GetPlaybackRate()); |
| VolumeChangedTask(GetVolume()); |
| |
| if (audio_renderer_) { |
| bound_fns.Push(base::Bind( |
| &AudioRenderer::Play, base::Unretained(audio_renderer_.get()))); |
| } |
| |
| if (video_renderer_) { |
| bound_fns.Push(base::Bind( |
| &VideoRenderer::Play, base::Unretained(video_renderer_.get()))); |
| } |
| |
| if (text_renderer_) { |
| bound_fns.Push(base::Bind( |
| &TextRenderer::Play, base::Unretained(text_renderer_.get()))); |
| } |
| |
| pending_callbacks_ = SerialRunner::Run(bound_fns, done_cb); |
| } |
| |
| void Pipeline::DoStop(const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(!pending_callbacks_.get()); |
| SerialRunner::Queue bound_fns; |
| |
| if (demuxer_) { |
| bound_fns.Push(base::Bind( |
| &Demuxer::Stop, base::Unretained(demuxer_))); |
| } |
| |
| if (audio_renderer_) { |
| bound_fns.Push(base::Bind( |
| &AudioRenderer::Stop, base::Unretained(audio_renderer_.get()))); |
| } |
| |
| if (video_renderer_) { |
| bound_fns.Push(base::Bind( |
| &VideoRenderer::Stop, base::Unretained(video_renderer_.get()))); |
| } |
| |
| if (text_renderer_) { |
| bound_fns.Push(base::Bind( |
| &TextRenderer::Stop, base::Unretained(text_renderer_.get()))); |
| } |
| |
| pending_callbacks_ = SerialRunner::Run(bound_fns, done_cb); |
| } |
| |
| void Pipeline::OnStopCompleted(PipelineStatus status) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK_EQ(state_, kStopping); |
| { |
| base::AutoLock l(lock_); |
| running_ = false; |
| } |
| |
| SetState(kStopped); |
| pending_callbacks_.reset(); |
| filter_collection_.reset(); |
| audio_renderer_.reset(); |
| video_renderer_.reset(); |
| text_renderer_.reset(); |
| demuxer_ = NULL; |
| |
| // If we stop during initialization/seeking we want to run |seek_cb_| |
| // followed by |stop_cb_| so we don't leave outstanding callbacks around. |
| if (!seek_cb_.is_null()) { |
| base::ResetAndReturn(&seek_cb_).Run(status_); |
| error_cb_.Reset(); |
| } |
| if (!stop_cb_.is_null()) { |
| error_cb_.Reset(); |
| base::ResetAndReturn(&stop_cb_).Run(); |
| |
| // NOTE: pipeline may be deleted at this point in time as a result of |
| // executing |stop_cb_|. |
| return; |
| } |
| if (!error_cb_.is_null()) { |
| DCHECK_NE(status_, PIPELINE_OK); |
| base::ResetAndReturn(&error_cb_).Run(status_); |
| } |
| } |
| |
| void Pipeline::AddBufferedByteRange(int64 start, int64 end) { |
| DCHECK(IsRunning()); |
| base::AutoLock auto_lock(lock_); |
| buffered_byte_ranges_.Add(start, end); |
| did_loading_progress_ = true; |
| } |
| |
| void Pipeline::AddBufferedTimeRange(base::TimeDelta start, |
| base::TimeDelta end) { |
| DCHECK(IsRunning()); |
| base::AutoLock auto_lock(lock_); |
| buffered_time_ranges_.Add(start, end); |
| did_loading_progress_ = true; |
| } |
| |
| void Pipeline::OnNaturalVideoSizeChanged(const gfx::Size& size) { |
| DCHECK(IsRunning()); |
| media_log_->AddEvent(media_log_->CreateVideoSizeSetEvent( |
| size.width(), size.height())); |
| |
| base::AutoLock auto_lock(lock_); |
| natural_size_ = size; |
| } |
| |
| void Pipeline::OnAudioRendererEnded() { |
| // Force post to process ended messages after current execution frame. |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::DoAudioRendererEnded, base::Unretained(this))); |
| media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::AUDIO_ENDED)); |
| } |
| |
| void Pipeline::OnVideoRendererEnded() { |
| // Force post to process ended messages after current execution frame. |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::DoVideoRendererEnded, base::Unretained(this))); |
| media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::VIDEO_ENDED)); |
| } |
| |
| void Pipeline::OnTextRendererEnded() { |
| // Force post to process ended messages after current execution frame. |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::DoTextRendererEnded, base::Unretained(this))); |
| media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::TEXT_ENDED)); |
| } |
| |
| // Called from any thread. |
| void Pipeline::OnUpdateStatistics(const PipelineStatistics& stats) { |
| base::AutoLock auto_lock(lock_); |
| statistics_.audio_bytes_decoded += stats.audio_bytes_decoded; |
| statistics_.video_bytes_decoded += stats.video_bytes_decoded; |
| statistics_.video_frames_decoded += stats.video_frames_decoded; |
| statistics_.video_frames_dropped += stats.video_frames_dropped; |
| } |
| |
| void Pipeline::StartTask(scoped_ptr<FilterCollection> filter_collection, |
| const base::Closure& ended_cb, |
| const PipelineStatusCB& error_cb, |
| const PipelineStatusCB& seek_cb, |
| const BufferingStateCB& buffering_state_cb, |
| const base::Closure& duration_change_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| CHECK_EQ(kCreated, state_) |
| << "Media pipeline cannot be started more than once"; |
| |
| filter_collection_ = filter_collection.Pass(); |
| ended_cb_ = ended_cb; |
| error_cb_ = error_cb; |
| seek_cb_ = seek_cb; |
| buffering_state_cb_ = buffering_state_cb; |
| duration_change_cb_ = duration_change_cb; |
| |
| text_renderer_ = filter_collection_->GetTextRenderer(); |
| |
| if (text_renderer_) { |
| text_renderer_->Initialize( |
| base::Bind(&Pipeline::OnTextRendererEnded, base::Unretained(this))); |
| } |
| |
| StateTransitionTask(PIPELINE_OK); |
| } |
| |
| void Pipeline::StopTask(const base::Closure& stop_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(stop_cb_.is_null()); |
| |
| if (state_ == kStopped) { |
| stop_cb.Run(); |
| return; |
| } |
| |
| stop_cb_ = stop_cb; |
| |
| // We may already be stopping due to a runtime error. |
| if (state_ == kStopping) |
| return; |
| |
| SetState(kStopping); |
| pending_callbacks_.reset(); |
| DoStop(base::Bind(&Pipeline::OnStopCompleted, base::Unretained(this))); |
| } |
| |
| void Pipeline::ErrorChangedTask(PipelineStatus error) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK_NE(PIPELINE_OK, error) << "PIPELINE_OK isn't an error!"; |
| |
| if (state_ == kStopping || state_ == kStopped) |
| return; |
| |
| SetState(kStopping); |
| pending_callbacks_.reset(); |
| status_ = error; |
| |
| DoStop(base::Bind(&Pipeline::OnStopCompleted, base::Unretained(this))); |
| } |
| |
| void Pipeline::PlaybackRateChangedTask(float playback_rate) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| // Playback rate changes are only carried out while playing. |
| if (state_ != kStarting && state_ != kStarted) |
| return; |
| |
| { |
| base::AutoLock auto_lock(lock_); |
| clock_->SetPlaybackRate(playback_rate); |
| } |
| |
| if (audio_renderer_) |
| audio_renderer_->SetPlaybackRate(playback_rate_); |
| if (video_renderer_) |
| video_renderer_->SetPlaybackRate(playback_rate_); |
| } |
| |
| void Pipeline::VolumeChangedTask(float volume) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| // Volume changes are only carried out while playing. |
| if (state_ != kStarting && state_ != kStarted) |
| return; |
| |
| if (audio_renderer_) |
| audio_renderer_->SetVolume(volume); |
| } |
| |
| void Pipeline::SeekTask(TimeDelta time, const PipelineStatusCB& seek_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| DCHECK(stop_cb_.is_null()); |
| |
| // Suppress seeking if we're not fully started. |
| if (state_ != kStarted) { |
| DCHECK(state_ == kStopping || state_ == kStopped) |
| << "Receive extra seek in unexpected state: " << state_; |
| |
| // TODO(scherkus): should we run the callback? I'm tempted to say the API |
| // will only execute the first Seek() request. |
| DVLOG(1) << "Media pipeline has not started, ignoring seek to " |
| << time.InMicroseconds() << " (current state: " << state_ << ")"; |
| return; |
| } |
| |
| DCHECK(seek_cb_.is_null()); |
| |
| SetState(kSeeking); |
| base::TimeDelta seek_timestamp = std::max(time, demuxer_->GetStartTime()); |
| seek_cb_ = seek_cb; |
| audio_ended_ = false; |
| video_ended_ = false; |
| text_ended_ = false; |
| |
| // Kick off seeking! |
| { |
| base::AutoLock auto_lock(lock_); |
| if (clock_->IsPlaying()) |
| clock_->Pause(); |
| clock_->SetTime(seek_timestamp, seek_timestamp); |
| } |
| DoSeek(seek_timestamp, base::Bind( |
| &Pipeline::OnStateTransition, base::Unretained(this))); |
| } |
| |
| void Pipeline::DoAudioRendererEnded() { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| if (state_ != kStarted) |
| return; |
| |
| DCHECK(!audio_ended_); |
| audio_ended_ = true; |
| |
| // Start clock since there is no more audio to trigger clock updates. |
| if (!audio_disabled_) { |
| base::AutoLock auto_lock(lock_); |
| clock_->SetMaxTime(clock_->Duration()); |
| StartClockIfWaitingForTimeUpdate_Locked(); |
| } |
| |
| RunEndedCallbackIfNeeded(); |
| } |
| |
| void Pipeline::DoVideoRendererEnded() { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| if (state_ != kStarted) |
| return; |
| |
| DCHECK(!video_ended_); |
| video_ended_ = true; |
| |
| RunEndedCallbackIfNeeded(); |
| } |
| |
| void Pipeline::DoTextRendererEnded() { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| if (state_ != kStarted) |
| return; |
| |
| DCHECK(!text_ended_); |
| text_ended_ = true; |
| |
| RunEndedCallbackIfNeeded(); |
| } |
| |
| void Pipeline::RunEndedCallbackIfNeeded() { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| if (audio_renderer_ && !audio_ended_ && !audio_disabled_) |
| return; |
| |
| if (video_renderer_ && !video_ended_) |
| return; |
| |
| if (text_renderer_ && text_renderer_->HasTracks() && !text_ended_) |
| return; |
| |
| { |
| base::AutoLock auto_lock(lock_); |
| clock_->EndOfStream(); |
| } |
| |
| DCHECK_EQ(status_, PIPELINE_OK); |
| ended_cb_.Run(); |
| } |
| |
| void Pipeline::AudioDisabledTask() { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| base::AutoLock auto_lock(lock_); |
| has_audio_ = false; |
| audio_disabled_ = true; |
| |
| // Notify our demuxer that we're no longer rendering audio. |
| demuxer_->OnAudioRendererDisabled(); |
| |
| // Start clock since there is no more audio to trigger clock updates. |
| clock_->SetMaxTime(clock_->Duration()); |
| StartClockIfWaitingForTimeUpdate_Locked(); |
| } |
| |
| void Pipeline::AddTextStreamTask(DemuxerStream* text_stream, |
| const TextTrackConfig& config) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| // TODO(matthewjheaney): fix up text_ended_ when text stream |
| // is added (http://crbug.com/321446). |
| text_renderer_->AddTextStream(text_stream, config); |
| } |
| |
| void Pipeline::RemoveTextStreamTask(DemuxerStream* text_stream) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| text_renderer_->RemoveTextStream(text_stream); |
| } |
| |
| void Pipeline::InitializeDemuxer(const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| demuxer_ = filter_collection_->GetDemuxer(); |
| demuxer_->Initialize(this, done_cb, text_renderer_); |
| } |
| |
| void Pipeline::InitializeAudioRenderer(const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| audio_renderer_ = filter_collection_->GetAudioRenderer(); |
| audio_renderer_->Initialize( |
| demuxer_->GetStream(DemuxerStream::AUDIO), |
| done_cb, |
| base::Bind(&Pipeline::OnUpdateStatistics, base::Unretained(this)), |
| base::Bind(&Pipeline::OnAudioUnderflow, base::Unretained(this)), |
| base::Bind(&Pipeline::OnAudioTimeUpdate, base::Unretained(this)), |
| base::Bind(&Pipeline::OnAudioRendererEnded, base::Unretained(this)), |
| base::Bind(&Pipeline::OnAudioDisabled, base::Unretained(this)), |
| base::Bind(&Pipeline::SetError, base::Unretained(this))); |
| } |
| |
| void Pipeline::InitializeVideoRenderer(const PipelineStatusCB& done_cb) { |
| DCHECK(message_loop_->BelongsToCurrentThread()); |
| |
| DemuxerStream* stream = demuxer_->GetStream(DemuxerStream::VIDEO); |
| |
| { |
| // Get an initial natural size so we have something when we signal |
| // the kHaveMetadata buffering state. |
| base::AutoLock l(lock_); |
| natural_size_ = stream->video_decoder_config().natural_size(); |
| } |
| |
| video_renderer_ = filter_collection_->GetVideoRenderer(); |
| video_renderer_->Initialize( |
| stream, |
| done_cb, |
| base::Bind(&Pipeline::OnUpdateStatistics, base::Unretained(this)), |
| base::Bind(&Pipeline::OnVideoTimeUpdate, base::Unretained(this)), |
| base::Bind(&Pipeline::OnNaturalVideoSizeChanged, base::Unretained(this)), |
| base::Bind(&Pipeline::OnVideoRendererEnded, base::Unretained(this)), |
| base::Bind(&Pipeline::SetError, base::Unretained(this)), |
| base::Bind(&Pipeline::GetMediaTime, base::Unretained(this)), |
| base::Bind(&Pipeline::GetMediaDuration, base::Unretained(this))); |
| } |
| |
| void Pipeline::OnAudioUnderflow() { |
| if (!message_loop_->BelongsToCurrentThread()) { |
| message_loop_->PostTask(FROM_HERE, base::Bind( |
| &Pipeline::OnAudioUnderflow, base::Unretained(this))); |
| return; |
| } |
| |
| if (state_ != kStarted) |
| return; |
| |
| if (audio_renderer_) |
| audio_renderer_->ResumeAfterUnderflow(); |
| } |
| |
| void Pipeline::StartClockIfWaitingForTimeUpdate_Locked() { |
| lock_.AssertAcquired(); |
| if (!waiting_for_clock_update_) |
| return; |
| |
| waiting_for_clock_update_ = false; |
| clock_->Play(); |
| } |
| |
| } // namespace media |