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|
// 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/metrics/histogram.h"
#include "base/message_loop.h"
#include "base/stl_util.h"
#include "base/string_number_conversions.h"
#include "base/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/video_decoder.h"
#include "media/base/video_decoder_config.h"
#include "media/base/video_renderer.h"
using base::TimeDelta;
namespace media {
PipelineStatusNotification::PipelineStatusNotification()
: cv_(&lock_), status_(PIPELINE_OK), notified_(false) {
}
PipelineStatusNotification::~PipelineStatusNotification() {
DCHECK(notified_);
}
PipelineStatusCB PipelineStatusNotification::Callback() {
return base::Bind(&PipelineStatusNotification::Notify,
base::Unretained(this));
}
void PipelineStatusNotification::Notify(media::PipelineStatus status) {
base::AutoLock auto_lock(lock_);
DCHECK(!notified_);
notified_ = true;
status_ = status;
cv_.Signal();
}
void PipelineStatusNotification::Wait() {
base::AutoLock auto_lock(lock_);
while (!notified_)
cv_.Wait();
}
media::PipelineStatus PipelineStatusNotification::status() {
base::AutoLock auto_lock(lock_);
DCHECK(notified_);
return status_;
}
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(&base::Time::Now)),
waiting_for_clock_update_(false),
status_(PIPELINE_OK),
has_audio_(false),
has_video_(false),
state_(kCreated),
audio_ended_(false),
video_ended_(false),
audio_disabled_(false),
creation_time_(base::Time::Now()) {
media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(kCreated));
media_log_->AddEvent(
media_log_->CreateEvent(MediaLogEvent::PIPELINE_CREATED));
}
Pipeline::~Pipeline() {
// TODO(scherkus): Reenable after figuring out why this is firing, see
// http://crbug.com/148405
#if 0
DCHECK(thread_checker_.CalledOnValidThread())
<< "Pipeline must be destroyed on same thread that created it";
#endif
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) {
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, this, base::Passed(&collection),
ended_cb, error_cb, seek_cb, buffering_state_cb));
}
void Pipeline::Stop(const base::Closure& stop_cb) {
base::AutoLock auto_lock(lock_);
message_loop_->PostTask(FROM_HERE, base::Bind(
&Pipeline::StopTask, 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, 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, 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, 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", base::Time::Now() - creation_time_);
creation_time_ = base::Time();
}
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::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, this, error));
media_log_->AddEvent(media_log_->CreatePipelineErrorEvent(error));
}
void Pipeline::OnAudioDisabled() {
DCHECK(IsRunning());
message_loop_->PostTask(FROM_HERE, base::Bind(
&Pipeline::AudioDisabledTask, 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);
}
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();
TimeDelta time_offset = byte_offset * clock_->Duration() / total_bytes_;
// 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, 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, 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;
}
}
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, audio_renderer_, 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, audio_renderer_));
if (video_renderer_) {
bound_fns.Push(base::Bind(
&VideoRenderer::Pause, base::Unretained(video_renderer_.get())));
}
// Flush.
if (audio_renderer_)
bound_fns.Push(base::Bind(&AudioRenderer::Flush, audio_renderer_));
if (video_renderer_) {
bound_fns.Push(base::Bind(
&VideoRenderer::Flush, base::Unretained(video_renderer_.get())));
}
// Seek demuxer.
bound_fns.Push(base::Bind(
&Demuxer::Seek, demuxer_, seek_timestamp));
// Preroll renderers.
if (audio_renderer_) {
bound_fns.Push(base::Bind(
&AudioRenderer::Preroll, audio_renderer_, 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, audio_renderer_));
if (video_renderer_) {
bound_fns.Push(base::Bind(
&VideoRenderer::Play, base::Unretained(video_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, demuxer_));
if (audio_renderer_)
bound_fns.Push(base::Bind(&AudioRenderer::Stop, audio_renderer_));
if (video_renderer_) {
bound_fns.Push(base::Bind(
&VideoRenderer::Stop, base::Unretained(video_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_ = NULL;
video_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()) {
base::ResetAndReturn(&stop_cb_).Run();
error_cb_.Reset();
}
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, 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, this));
media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::VIDEO_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) {
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;
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;
}
SetState(kStopping);
pending_callbacks_.reset();
stop_cb_ = stop_cb;
DoStop(base::Bind(&Pipeline::OnStopCompleted, 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, 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 (demuxer_)
demuxer_->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;
// 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, 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::RunEndedCallbackIfNeeded() {
DCHECK(message_loop_->BelongsToCurrentThread());
if (audio_renderer_ && !audio_ended_ && !audio_disabled_)
return;
if (video_renderer_ && !video_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::InitializeDemuxer(const PipelineStatusCB& done_cb) {
DCHECK(message_loop_->BelongsToCurrentThread());
demuxer_ = filter_collection_->GetDemuxer();
demuxer_->Initialize(this, done_cb);
}
void Pipeline::InitializeAudioRenderer(const PipelineStatusCB& done_cb) {
DCHECK(message_loop_->BelongsToCurrentThread());
scoped_refptr<DemuxerStream> stream =
demuxer_->GetStream(DemuxerStream::AUDIO);
DCHECK(stream);
filter_collection_->SelectAudioRenderer(&audio_renderer_);
audio_renderer_->Initialize(
stream,
*filter_collection_->GetAudioDecoders(),
done_cb,
base::Bind(&Pipeline::OnUpdateStatistics, this),
base::Bind(&Pipeline::OnAudioUnderflow, this),
base::Bind(&Pipeline::OnAudioTimeUpdate, this),
base::Bind(&Pipeline::OnAudioRendererEnded, this),
base::Bind(&Pipeline::OnAudioDisabled, this),
base::Bind(&Pipeline::SetError, this));
filter_collection_->GetAudioDecoders()->clear();
}
void Pipeline::InitializeVideoRenderer(const PipelineStatusCB& done_cb) {
DCHECK(message_loop_->BelongsToCurrentThread());
scoped_refptr<DemuxerStream> stream =
demuxer_->GetStream(DemuxerStream::VIDEO);
DCHECK(stream);
{
// 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,
*filter_collection_->GetVideoDecoders(),
done_cb,
base::Bind(&Pipeline::OnUpdateStatistics, this),
base::Bind(&Pipeline::OnVideoTimeUpdate, this),
base::Bind(&Pipeline::OnNaturalVideoSizeChanged, this),
base::Bind(&Pipeline::OnVideoRendererEnded, this),
base::Bind(&Pipeline::SetError, this),
base::Bind(&Pipeline::GetMediaTime, this),
base::Bind(&Pipeline::GetMediaDuration, this));
filter_collection_->GetVideoDecoders()->clear();
}
void Pipeline::OnAudioUnderflow() {
if (!message_loop_->BelongsToCurrentThread()) {
message_loop_->PostTask(FROM_HERE, base::Bind(
&Pipeline::OnAudioUnderflow, this));
return;
}
if (state_ != kStarted)
return;
if (audio_renderer_)
audio_renderer_->ResumeAfterUnderflow(true);
}
void Pipeline::StartClockIfWaitingForTimeUpdate_Locked() {
lock_.AssertAcquired();
if (!waiting_for_clock_update_)
return;
waiting_for_clock_update_ = false;
clock_->Play();
}
} // namespace media
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