Google Git
Sign in
android / platform / external / chromium_org / 862bd7759b5ede90f02436dab473f47a24ab7e9b / . / content / renderer / media / webmediaplayer_impl.cc
blob: 12153eea808d69005f99aa07c7e849baa5248767 [file] [log] [blame]
// Copyright 2013 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 "content/renderer/media/webmediaplayer_impl.h"
#include <algorithm>
#include <limits>
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/callback.h"
#include "base/callback_helpers.h"
#include "base/command_line.h"
#include "base/debug/alias.h"
#include "base/debug/crash_logging.h"
#include "base/debug/trace_event.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/metrics/histogram.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "base/synchronization/waitable_event.h"
#include "cc/layers/video_layer.h"
#include "content/public/common/content_switches.h"
#include "content/public/renderer/render_frame.h"
#include "content/renderer/compositor_bindings/web_layer_impl.h"
#include "content/renderer/media/buffered_data_source.h"
#include "content/renderer/media/crypto/key_systems.h"
#include "content/renderer/media/render_media_log.h"
#include "content/renderer/media/texttrack_impl.h"
#include "content/renderer/media/webaudiosourceprovider_impl.h"
#include "content/renderer/media/webcontentdecryptionmodule_impl.h"
#include "content/renderer/media/webinbandtexttrack_impl.h"
#include "content/renderer/media/webmediaplayer_delegate.h"
#include "content/renderer/media/webmediaplayer_params.h"
#include "content/renderer/media/webmediaplayer_util.h"
#include "content/renderer/media/webmediasource_impl.h"
#include "content/renderer/pepper/pepper_webplugin_impl.h"
#include "content/renderer/render_thread_impl.h"
#include "gpu/GLES2/gl2extchromium.h"
#include "gpu/command_buffer/common/mailbox_holder.h"
#include "media/audio/null_audio_sink.h"
#include "media/base/audio_hardware_config.h"
#include "media/base/bind_to_current_loop.h"
#include "media/base/filter_collection.h"
#include "media/base/limits.h"
#include "media/base/media_log.h"
#include "media/base/media_switches.h"
#include "media/base/pipeline.h"
#include "media/base/text_renderer.h"
#include "media/base/video_frame.h"
#include "media/filters/audio_renderer_impl.h"
#include "media/filters/chunk_demuxer.h"
#include "media/filters/ffmpeg_audio_decoder.h"
#include "media/filters/ffmpeg_demuxer.h"
#include "media/filters/ffmpeg_video_decoder.h"
#include "media/filters/gpu_video_accelerator_factories.h"
#include "media/filters/gpu_video_decoder.h"
#include "media/filters/opus_audio_decoder.h"
#include "media/filters/video_renderer_impl.h"
#include "media/filters/vpx_video_decoder.h"
#include "third_party/WebKit/public/platform/WebContentDecryptionModule.h"
#include "third_party/WebKit/public/platform/WebMediaSource.h"
#include "third_party/WebKit/public/platform/WebRect.h"
#include "third_party/WebKit/public/platform/WebSize.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebURL.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
#include "third_party/WebKit/public/web/WebSecurityOrigin.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "v8/include/v8.h"
#if defined(ENABLE_PEPPER_CDMS)
#include "content/renderer/media/crypto/pepper_cdm_wrapper_impl.h"
#endif
using blink::WebCanvas;
using blink::WebMediaPlayer;
using blink::WebRect;
using blink::WebSize;
using blink::WebString;
using media::PipelineStatus;
namespace {
// Amount of extra memory used by each player instance reported to V8.
// It is not exact number -- first, it differs on different platforms,
// and second, it is very hard to calculate. Instead, use some arbitrary
// value that will cause garbage collection from time to time. We don't want
// it to happen on every allocation, but don't want 5k players to sit in memory
// either. Looks that chosen constant achieves both goals, at least for audio
// objects. (Do not worry about video objects yet, JS programs do not create
// thousands of them...)
const int kPlayerExtraMemory = 1024 * 1024;
// Limits the range of playback rate.
//
// TODO(kylep): Revisit these.
//
// Vista has substantially lower performance than XP or Windows7. If you speed
// up a video too much, it can't keep up, and rendering stops updating except on
// the time bar. For really high speeds, audio becomes a bottleneck and we just
// use up the data we have, which may not achieve the speed requested, but will
// not crash the tab.
//
// A very slow speed, ie 0.00000001x, causes the machine to lock up. (It seems
// like a busy loop). It gets unresponsive, although its not completely dead.
//
// Also our timers are not very accurate (especially for ogg), which becomes
// evident at low speeds and on Vista. Since other speeds are risky and outside
// the norms, we think 1/16x to 16x is a safe and useful range for now.
const double kMinRate = 0.0625;
const double kMaxRate = 16.0;
// Prefix for histograms related to Encrypted Media Extensions.
const char* kMediaEme = "Media.EME.";
} // namespace
namespace content {
class BufferedDataSourceHostImpl;
#define COMPILE_ASSERT_MATCHING_ENUM(name) \
COMPILE_ASSERT(static_cast<int>(WebMediaPlayer::CORSMode ## name) == \
static_cast<int>(BufferedResourceLoader::k ## name), \
mismatching_enums)
COMPILE_ASSERT_MATCHING_ENUM(Unspecified);
COMPILE_ASSERT_MATCHING_ENUM(Anonymous);
COMPILE_ASSERT_MATCHING_ENUM(UseCredentials);
#undef COMPILE_ASSERT_MATCHING_ENUM
#define BIND_TO_RENDER_LOOP(function) \
(DCHECK(main_loop_->BelongsToCurrentThread()), \
media::BindToCurrentLoop(base::Bind(function, AsWeakPtr())))
static void LogMediaSourceError(const scoped_refptr<media::MediaLog>& media_log,
const std::string& error) {
media_log->AddEvent(media_log->CreateMediaSourceErrorEvent(error));
}
WebMediaPlayerImpl::WebMediaPlayerImpl(
blink::WebLocalFrame* frame,
blink::WebMediaPlayerClient* client,
base::WeakPtr<WebMediaPlayerDelegate> delegate,
const WebMediaPlayerParams& params)
: frame_(frame),
network_state_(WebMediaPlayer::NetworkStateEmpty),
ready_state_(WebMediaPlayer::ReadyStateHaveNothing),
main_loop_(base::MessageLoopProxy::current()),
media_loop_(
RenderThreadImpl::current()->GetMediaThreadMessageLoopProxy()),
media_log_(new RenderMediaLog()),
pipeline_(media_loop_, media_log_.get()),
opaque_(false),
paused_(true),
seeking_(false),
playback_rate_(0.0f),
pending_seek_(false),
pending_seek_seconds_(0.0f),
client_(client),
delegate_(delegate),
defer_load_cb_(params.defer_load_cb()),
accelerated_compositing_reported_(false),
incremented_externally_allocated_memory_(false),
gpu_factories_(RenderThreadImpl::current()->GetGpuFactories()),
supports_save_(true),
chunk_demuxer_(NULL),
// Threaded compositing isn't enabled universally yet.
compositor_task_runner_(
RenderThreadImpl::current()->compositor_message_loop_proxy()
? RenderThreadImpl::current()->compositor_message_loop_proxy()
: base::MessageLoopProxy::current()),
compositor_(new VideoFrameCompositor(
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNaturalSizeChanged),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnOpacityChanged))),
text_track_index_(0),
web_cdm_(NULL) {
media_log_->AddEvent(
media_log_->CreateEvent(media::MediaLogEvent::WEBMEDIAPLAYER_CREATED));
// |gpu_factories_| requires that its entry points be called on its
// |GetTaskRunner()|. Since |pipeline_| will own decoders created from the
// factories, require that their message loops are identical.
DCHECK(!gpu_factories_ || (gpu_factories_->GetTaskRunner() == media_loop_));
// Let V8 know we started new thread if we did not do it yet.
// Made separate task to avoid deletion of player currently being created.
// Also, delaying GC until after player starts gets rid of starting lag --
// collection happens in parallel with playing.
//
// TODO(enal): remove when we get rid of per-audio-stream thread.
main_loop_->PostTask(
FROM_HERE,
base::Bind(&WebMediaPlayerImpl::IncrementExternallyAllocatedMemory,
AsWeakPtr()));
// Use the null sink if no sink was provided.
audio_source_provider_ = new WebAudioSourceProviderImpl(
params.audio_renderer_sink().get()
? params.audio_renderer_sink()
: new media::NullAudioSink(media_loop_));
}
WebMediaPlayerImpl::~WebMediaPlayerImpl() {
client_->setWebLayer(NULL);
DCHECK(main_loop_->BelongsToCurrentThread());
media_log_->AddEvent(
media_log_->CreateEvent(media::MediaLogEvent::WEBMEDIAPLAYER_DESTROYED));
if (delegate_.get())
delegate_->PlayerGone(this);
// Abort any pending IO so stopping the pipeline doesn't get blocked.
if (data_source_)
data_source_->Abort();
if (chunk_demuxer_) {
chunk_demuxer_->Shutdown();
chunk_demuxer_ = NULL;
}
gpu_factories_ = NULL;
// Make sure to kill the pipeline so there's no more media threads running.
// Note: stopping the pipeline might block for a long time.
base::WaitableEvent waiter(false, false);
pipeline_.Stop(
base::Bind(&base::WaitableEvent::Signal, base::Unretained(&waiter)));
waiter.Wait();
compositor_task_runner_->DeleteSoon(FROM_HERE, compositor_);
// Let V8 know we are not using extra resources anymore.
if (incremented_externally_allocated_memory_) {
v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(
-kPlayerExtraMemory);
incremented_externally_allocated_memory_ = false;
}
}
void WebMediaPlayerImpl::load(LoadType load_type, const blink::WebURL& url,
CORSMode cors_mode) {
DVLOG(1) << __FUNCTION__ << "(" << load_type << ", " << url << ", "
<< cors_mode << ")";
if (!defer_load_cb_.is_null()) {
defer_load_cb_.Run(base::Bind(
&WebMediaPlayerImpl::DoLoad, AsWeakPtr(), load_type, url, cors_mode));
return;
}
DoLoad(load_type, url, cors_mode);
}
void WebMediaPlayerImpl::DoLoad(LoadType load_type,
const blink::WebURL& url,
CORSMode cors_mode) {
DCHECK(main_loop_->BelongsToCurrentThread());
GURL gurl(url);
ReportMediaSchemeUma(gurl);
// Set subresource URL for crash reporting.
base::debug::SetCrashKeyValue("subresource_url", gurl.spec());
load_type_ = load_type;
// Handle any volume/preload changes that occurred before load().
setVolume(client_->volume());
setPreload(client_->preload());
SetNetworkState(WebMediaPlayer::NetworkStateLoading);
SetReadyState(WebMediaPlayer::ReadyStateHaveNothing);
media_log_->AddEvent(media_log_->CreateLoadEvent(url.spec()));
// Media source pipelines can start immediately.
if (load_type == LoadTypeMediaSource) {
supports_save_ = false;
StartPipeline();
return;
}
// Otherwise it's a regular request which requires resolving the URL first.
data_source_.reset(new BufferedDataSource(
url,
static_cast<BufferedResourceLoader::CORSMode>(cors_mode),
main_loop_,
frame_,
media_log_.get(),
&buffered_data_source_host_,
base::Bind(&WebMediaPlayerImpl::NotifyDownloading, AsWeakPtr())));
data_source_->Initialize(
base::Bind(&WebMediaPlayerImpl::DataSourceInitialized, AsWeakPtr()));
}
void WebMediaPlayerImpl::play() {
DVLOG(1) << __FUNCTION__;
DCHECK(main_loop_->BelongsToCurrentThread());
paused_ = false;
pipeline_.SetPlaybackRate(playback_rate_);
if (data_source_)
data_source_->MediaIsPlaying();
media_log_->AddEvent(media_log_->CreateEvent(media::MediaLogEvent::PLAY));
if (delegate_.get())
delegate_->DidPlay(this);
}
void WebMediaPlayerImpl::pause() {
DVLOG(1) << __FUNCTION__;
DCHECK(main_loop_->BelongsToCurrentThread());
paused_ = true;
pipeline_.SetPlaybackRate(0.0f);
if (data_source_)
data_source_->MediaIsPaused();
paused_time_ = pipeline_.GetMediaTime();
media_log_->AddEvent(media_log_->CreateEvent(media::MediaLogEvent::PAUSE));
if (delegate_.get())
delegate_->DidPause(this);
}
bool WebMediaPlayerImpl::supportsSave() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return supports_save_;
}
void WebMediaPlayerImpl::seek(double seconds) {
DVLOG(1) << __FUNCTION__ << "(" << seconds << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
if (ready_state_ > WebMediaPlayer::ReadyStateHaveMetadata)
SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
base::TimeDelta seek_time = ConvertSecondsToTimestamp(seconds);
if (seeking_) {
pending_seek_ = true;
pending_seek_seconds_ = seconds;
if (chunk_demuxer_)
chunk_demuxer_->CancelPendingSeek(seek_time);
return;
}
media_log_->AddEvent(media_log_->CreateSeekEvent(seconds));
// Update our paused time.
if (paused_)
paused_time_ = seek_time;
seeking_ = true;
if (chunk_demuxer_)
chunk_demuxer_->StartWaitingForSeek(seek_time);
// Kick off the asynchronous seek!
pipeline_.Seek(
seek_time,
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineSeek));
}
void WebMediaPlayerImpl::setRate(double rate) {
DVLOG(1) << __FUNCTION__ << "(" << rate << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
// TODO(kylep): Remove when support for negatives is added. Also, modify the
// following checks so rewind uses reasonable values also.
if (rate < 0.0)
return;
// Limit rates to reasonable values by clamping.
if (rate != 0.0) {
if (rate < kMinRate)
rate = kMinRate;
else if (rate > kMaxRate)
rate = kMaxRate;
}
playback_rate_ = rate;
if (!paused_) {
pipeline_.SetPlaybackRate(rate);
if (data_source_)
data_source_->MediaPlaybackRateChanged(rate);
}
}
void WebMediaPlayerImpl::setVolume(double volume) {
DVLOG(1) << __FUNCTION__ << "(" << volume << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
pipeline_.SetVolume(volume);
}
#define COMPILE_ASSERT_MATCHING_ENUM(webkit_name, chromium_name) \
COMPILE_ASSERT(static_cast<int>(WebMediaPlayer::webkit_name) == \
static_cast<int>(content::chromium_name), \
mismatching_enums)
COMPILE_ASSERT_MATCHING_ENUM(PreloadNone, NONE);
COMPILE_ASSERT_MATCHING_ENUM(PreloadMetaData, METADATA);
COMPILE_ASSERT_MATCHING_ENUM(PreloadAuto, AUTO);
#undef COMPILE_ASSERT_MATCHING_ENUM
void WebMediaPlayerImpl::setPreload(WebMediaPlayer::Preload preload) {
DVLOG(1) << __FUNCTION__ << "(" << preload << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
if (data_source_)
data_source_->SetPreload(static_cast<content::Preload>(preload));
}
bool WebMediaPlayerImpl::hasVideo() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return pipeline_metadata_.has_video;
}
bool WebMediaPlayerImpl::hasAudio() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return pipeline_metadata_.has_audio;
}
blink::WebSize WebMediaPlayerImpl::naturalSize() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return blink::WebSize(pipeline_metadata_.natural_size);
}
bool WebMediaPlayerImpl::paused() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return pipeline_.GetPlaybackRate() == 0.0f;
}
bool WebMediaPlayerImpl::seeking() const {
DCHECK(main_loop_->BelongsToCurrentThread());
if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
return false;
return seeking_;
}
double WebMediaPlayerImpl::duration() const {
DCHECK(main_loop_->BelongsToCurrentThread());
if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
return std::numeric_limits<double>::quiet_NaN();
return GetPipelineDuration();
}
double WebMediaPlayerImpl::timelineOffset() const {
DCHECK(main_loop_->BelongsToCurrentThread());
if (pipeline_metadata_.timeline_offset.is_null())
return std::numeric_limits<double>::quiet_NaN();
return pipeline_metadata_.timeline_offset.ToJsTime();
}
double WebMediaPlayerImpl::currentTime() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return (paused_ ? paused_time_ : pipeline_.GetMediaTime()).InSecondsF();
}
WebMediaPlayer::NetworkState WebMediaPlayerImpl::networkState() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return network_state_;
}
WebMediaPlayer::ReadyState WebMediaPlayerImpl::readyState() const {
DCHECK(main_loop_->BelongsToCurrentThread());
return ready_state_;
}
blink::WebTimeRanges WebMediaPlayerImpl::buffered() const {
DCHECK(main_loop_->BelongsToCurrentThread());
media::Ranges<base::TimeDelta> buffered_time_ranges =
pipeline_.GetBufferedTimeRanges();
buffered_data_source_host_.AddBufferedTimeRanges(
&buffered_time_ranges, pipeline_.GetMediaDuration());
return ConvertToWebTimeRanges(buffered_time_ranges);
}
double WebMediaPlayerImpl::maxTimeSeekable() const {
DCHECK(main_loop_->BelongsToCurrentThread());
// If we haven't even gotten to ReadyStateHaveMetadata yet then just
// return 0 so that the seekable range is empty.
if (ready_state_ < WebMediaPlayer::ReadyStateHaveMetadata)
return 0.0;
// We don't support seeking in streaming media.
if (data_source_ && data_source_->IsStreaming())
return 0.0;
return duration();
}
bool WebMediaPlayerImpl::didLoadingProgress() {
DCHECK(main_loop_->BelongsToCurrentThread());
bool pipeline_progress = pipeline_.DidLoadingProgress();
bool data_progress = buffered_data_source_host_.DidLoadingProgress();
return pipeline_progress || data_progress;
}
void WebMediaPlayerImpl::paint(WebCanvas* canvas,
const WebRect& rect,
unsigned char alpha) {
DCHECK(main_loop_->BelongsToCurrentThread());
TRACE_EVENT0("media", "WebMediaPlayerImpl:paint");
if (!accelerated_compositing_reported_) {
accelerated_compositing_reported_ = true;
// Normally paint() is only called in non-accelerated rendering, but there
// are exceptions such as webgl where compositing is used in the WebView but
// video frames are still rendered to a canvas.
UMA_HISTOGRAM_BOOLEAN(
"Media.AcceleratedCompositingActive",
frame_->view()->isAcceleratedCompositingActive());
}
// TODO(scherkus): Clarify paint() API contract to better understand when and
// why it's being called. For example, today paint() is called when:
// - We haven't reached HAVE_CURRENT_DATA and need to paint black
// - We're painting to a canvas
// See http://crbug.com/341225 http://crbug.com/342621 for details.
scoped_refptr<media::VideoFrame> video_frame =
GetCurrentFrameFromCompositor();
gfx::Rect gfx_rect(rect);
skcanvas_video_renderer_.Paint(video_frame.get(), canvas, gfx_rect, alpha);
}
bool WebMediaPlayerImpl::hasSingleSecurityOrigin() const {
if (data_source_)
return data_source_->HasSingleOrigin();
return true;
}
bool WebMediaPlayerImpl::didPassCORSAccessCheck() const {
if (data_source_)
return data_source_->DidPassCORSAccessCheck();
return false;
}
double WebMediaPlayerImpl::mediaTimeForTimeValue(double timeValue) const {
return ConvertSecondsToTimestamp(timeValue).InSecondsF();
}
unsigned WebMediaPlayerImpl::decodedFrameCount() const {
DCHECK(main_loop_->BelongsToCurrentThread());
media::PipelineStatistics stats = pipeline_.GetStatistics();
return stats.video_frames_decoded;
}
unsigned WebMediaPlayerImpl::droppedFrameCount() const {
DCHECK(main_loop_->BelongsToCurrentThread());
media::PipelineStatistics stats = pipeline_.GetStatistics();
return stats.video_frames_dropped;
}
unsigned WebMediaPlayerImpl::audioDecodedByteCount() const {
DCHECK(main_loop_->BelongsToCurrentThread());
media::PipelineStatistics stats = pipeline_.GetStatistics();
return stats.audio_bytes_decoded;
}
unsigned WebMediaPlayerImpl::videoDecodedByteCount() const {
DCHECK(main_loop_->BelongsToCurrentThread());
media::PipelineStatistics stats = pipeline_.GetStatistics();
return stats.video_bytes_decoded;
}
bool WebMediaPlayerImpl::copyVideoTextureToPlatformTexture(
blink::WebGraphicsContext3D* web_graphics_context,
unsigned int texture,
unsigned int level,
unsigned int internal_format,
unsigned int type,
bool premultiply_alpha,
bool flip_y) {
TRACE_EVENT0("media", "WebMediaPlayerImpl:copyVideoTextureToPlatformTexture");
scoped_refptr<media::VideoFrame> video_frame =
GetCurrentFrameFromCompositor();
if (!video_frame)
return false;
if (video_frame->format() != media::VideoFrame::NATIVE_TEXTURE)
return false;
const gpu::MailboxHolder* mailbox_holder = video_frame->mailbox_holder();
if (mailbox_holder->texture_target != GL_TEXTURE_2D)
return false;
// Since this method changes which texture is bound to the TEXTURE_2D target,
// ideally it would restore the currently-bound texture before returning.
// The cost of getIntegerv is sufficiently high, however, that we want to
// avoid it in user builds. As a result assume (below) that |texture| is
// bound when this method is called, and only verify this fact when
// DCHECK_IS_ON.
#if DCHECK_IS_ON
GLint bound_texture = 0;
web_graphics_context->getIntegerv(GL_TEXTURE_BINDING_2D, &bound_texture);
DCHECK_EQ(static_cast<GLuint>(bound_texture), texture);
#endif
uint32 source_texture = web_graphics_context->createTexture();
web_graphics_context->waitSyncPoint(mailbox_holder->sync_point);
web_graphics_context->bindTexture(GL_TEXTURE_2D, source_texture);
web_graphics_context->consumeTextureCHROMIUM(GL_TEXTURE_2D,
mailbox_holder->mailbox.name);
// The video is stored in a unmultiplied format, so premultiply
// if necessary.
web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
premultiply_alpha);
// Application itself needs to take care of setting the right flip_y
// value down to get the expected result.
// flip_y==true means to reverse the video orientation while
// flip_y==false means to keep the intrinsic orientation.
web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, flip_y);
web_graphics_context->copyTextureCHROMIUM(GL_TEXTURE_2D,
source_texture,
texture,
level,
internal_format,
type);
web_graphics_context->pixelStorei(GL_UNPACK_FLIP_Y_CHROMIUM, false);
web_graphics_context->pixelStorei(GL_UNPACK_PREMULTIPLY_ALPHA_CHROMIUM,
false);
// Restore the state for TEXTURE_2D binding point as mentioned above.
web_graphics_context->bindTexture(GL_TEXTURE_2D, texture);
web_graphics_context->deleteTexture(source_texture);
web_graphics_context->flush();
video_frame->AppendReleaseSyncPoint(web_graphics_context->insertSyncPoint());
return true;
}
// Helper functions to report media EME related stats to UMA. They follow the
// convention of more commonly used macros UMA_HISTOGRAM_ENUMERATION and
// UMA_HISTOGRAM_COUNTS. The reason that we cannot use those macros directly is
// that UMA_* macros require the names to be constant throughout the process'
// lifetime.
static void EmeUMAHistogramEnumeration(const std::string& key_system,
const std::string& method,
int sample,
int boundary_value) {
base::LinearHistogram::FactoryGet(
kMediaEme + KeySystemNameForUMA(key_system) + "." + method,
1, boundary_value, boundary_value + 1,
base::Histogram::kUmaTargetedHistogramFlag)->Add(sample);
}
static void EmeUMAHistogramCounts(const std::string& key_system,
const std::string& method,
int sample) {
// Use the same parameters as UMA_HISTOGRAM_COUNTS.
base::Histogram::FactoryGet(
kMediaEme + KeySystemNameForUMA(key_system) + "." + method,
1, 1000000, 50, base::Histogram::kUmaTargetedHistogramFlag)->Add(sample);
}
// Helper enum for reporting generateKeyRequest/addKey histograms.
enum MediaKeyException {
kUnknownResultId,
kSuccess,
kKeySystemNotSupported,
kInvalidPlayerState,
kMaxMediaKeyException
};
static MediaKeyException MediaKeyExceptionForUMA(
WebMediaPlayer::MediaKeyException e) {
switch (e) {
case WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported:
return kKeySystemNotSupported;
case WebMediaPlayer::MediaKeyExceptionInvalidPlayerState:
return kInvalidPlayerState;
case WebMediaPlayer::MediaKeyExceptionNoError:
return kSuccess;
default:
return kUnknownResultId;
}
}
// Helper for converting |key_system| name and exception |e| to a pair of enum
// values from above, for reporting to UMA.
static void ReportMediaKeyExceptionToUMA(const std::string& method,
const std::string& key_system,
WebMediaPlayer::MediaKeyException e) {
MediaKeyException result_id = MediaKeyExceptionForUMA(e);
DCHECK_NE(result_id, kUnknownResultId) << e;
EmeUMAHistogramEnumeration(
key_system, method, result_id, kMaxMediaKeyException);
}
// Convert a WebString to ASCII, falling back on an empty string in the case
// of a non-ASCII string.
static std::string ToASCIIOrEmpty(const blink::WebString& string) {
return base::IsStringASCII(string) ? base::UTF16ToASCII(string)
: std::string();
}
WebMediaPlayer::MediaKeyException
WebMediaPlayerImpl::generateKeyRequest(const WebString& key_system,
const unsigned char* init_data,
unsigned init_data_length) {
DVLOG(1) << "generateKeyRequest: " << base::string16(key_system) << ": "
<< std::string(reinterpret_cast<const char*>(init_data),
static_cast<size_t>(init_data_length));
std::string ascii_key_system =
GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
WebMediaPlayer::MediaKeyException e =
GenerateKeyRequestInternal(ascii_key_system, init_data, init_data_length);
ReportMediaKeyExceptionToUMA("generateKeyRequest", ascii_key_system, e);
return e;
}
// Guess the type of |init_data|. This is only used to handle some corner cases
// so we keep it as simple as possible without breaking major use cases.
static std::string GuessInitDataType(const unsigned char* init_data,
unsigned init_data_length) {
// Most WebM files use KeyId of 16 bytes. MP4 init data are always >16 bytes.
if (init_data_length == 16)
return "video/webm";
return "video/mp4";
}
WebMediaPlayer::MediaKeyException
WebMediaPlayerImpl::GenerateKeyRequestInternal(const std::string& key_system,
const unsigned char* init_data,
unsigned init_data_length) {
DCHECK(main_loop_->BelongsToCurrentThread());
if (!IsConcreteSupportedKeySystem(key_system))
return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
// We do not support run-time switching between key systems for now.
if (current_key_system_.empty()) {
if (!proxy_decryptor_) {
proxy_decryptor_.reset(new ProxyDecryptor(
#if defined(ENABLE_PEPPER_CDMS)
// Create() must be called synchronously as |frame_| may not be
// valid afterwards.
base::Bind(&PepperCdmWrapperImpl::Create, frame_),
#elif defined(ENABLE_BROWSER_CDMS)
#error Browser side CDM in WMPI for prefixed EME API not supported yet.
#endif
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyAdded),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyError),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnKeyMessage)));
}
GURL security_origin(frame_->document().securityOrigin().toString());
if (!proxy_decryptor_->InitializeCDM(key_system, security_origin))
return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
if (proxy_decryptor_ && !decryptor_ready_cb_.is_null()) {
base::ResetAndReturn(&decryptor_ready_cb_)
.Run(proxy_decryptor_->GetDecryptor());
}
current_key_system_ = key_system;
} else if (key_system != current_key_system_) {
return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
}
std::string init_data_type = init_data_type_;
if (init_data_type.empty())
init_data_type = GuessInitDataType(init_data, init_data_length);
// TODO(xhwang): We assume all streams are from the same container (thus have
// the same "type") for now. In the future, the "type" should be passed down
// from the application.
if (!proxy_decryptor_->GenerateKeyRequest(
init_data_type, init_data, init_data_length)) {
current_key_system_.clear();
return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
}
return WebMediaPlayer::MediaKeyExceptionNoError;
}
WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::addKey(
const WebString& key_system,
const unsigned char* key,
unsigned key_length,
const unsigned char* init_data,
unsigned init_data_length,
const WebString& session_id) {
DVLOG(1) << "addKey: " << base::string16(key_system) << ": "
<< std::string(reinterpret_cast<const char*>(key),
static_cast<size_t>(key_length)) << ", "
<< std::string(reinterpret_cast<const char*>(init_data),
static_cast<size_t>(init_data_length)) << " ["
<< base::string16(session_id) << "]";
std::string ascii_key_system =
GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
std::string ascii_session_id = ToASCIIOrEmpty(session_id);
WebMediaPlayer::MediaKeyException e = AddKeyInternal(ascii_key_system,
key,
key_length,
init_data,
init_data_length,
ascii_session_id);
ReportMediaKeyExceptionToUMA("addKey", ascii_key_system, e);
return e;
}
WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::AddKeyInternal(
const std::string& key_system,
const unsigned char* key,
unsigned key_length,
const unsigned char* init_data,
unsigned init_data_length,
const std::string& session_id) {
DCHECK(key);
DCHECK_GT(key_length, 0u);
if (!IsConcreteSupportedKeySystem(key_system))
return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
if (current_key_system_.empty() || key_system != current_key_system_)
return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
proxy_decryptor_->AddKey(
key, key_length, init_data, init_data_length, session_id);
return WebMediaPlayer::MediaKeyExceptionNoError;
}
WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::cancelKeyRequest(
const WebString& key_system,
const WebString& session_id) {
DVLOG(1) << "cancelKeyRequest: " << base::string16(key_system) << ": "
<< " [" << base::string16(session_id) << "]";
std::string ascii_key_system =
GetUnprefixedKeySystemName(ToASCIIOrEmpty(key_system));
std::string ascii_session_id = ToASCIIOrEmpty(session_id);
WebMediaPlayer::MediaKeyException e =
CancelKeyRequestInternal(ascii_key_system, ascii_session_id);
ReportMediaKeyExceptionToUMA("cancelKeyRequest", ascii_key_system, e);
return e;
}
WebMediaPlayer::MediaKeyException WebMediaPlayerImpl::CancelKeyRequestInternal(
const std::string& key_system,
const std::string& session_id) {
if (!IsConcreteSupportedKeySystem(key_system))
return WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported;
if (current_key_system_.empty() || key_system != current_key_system_)
return WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
proxy_decryptor_->CancelKeyRequest(session_id);
return WebMediaPlayer::MediaKeyExceptionNoError;
}
void WebMediaPlayerImpl::setContentDecryptionModule(
blink::WebContentDecryptionModule* cdm) {
DCHECK(main_loop_->BelongsToCurrentThread());
// TODO(xhwang): Support setMediaKeys(0) if necessary: http://crbug.com/330324
if (!cdm)
return;
web_cdm_ = ToWebContentDecryptionModuleImpl(cdm);
if (web_cdm_ && !decryptor_ready_cb_.is_null())
base::ResetAndReturn(&decryptor_ready_cb_).Run(web_cdm_->GetDecryptor());
}
void WebMediaPlayerImpl::InvalidateOnMainThread() {
DCHECK(main_loop_->BelongsToCurrentThread());
TRACE_EVENT0("media", "WebMediaPlayerImpl::InvalidateOnMainThread");
client_->repaint();
}
void WebMediaPlayerImpl::OnPipelineSeek(PipelineStatus status) {
DVLOG(1) << __FUNCTION__ << "(" << status << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
seeking_ = false;
if (pending_seek_) {
pending_seek_ = false;
seek(pending_seek_seconds_);
return;
}
if (status != media::PIPELINE_OK) {
OnPipelineError(status);
return;
}
// Update our paused time.
if (paused_)
paused_time_ = pipeline_.GetMediaTime();
client_->timeChanged();
}
void WebMediaPlayerImpl::OnPipelineEnded() {
DVLOG(1) << __FUNCTION__;
DCHECK(main_loop_->BelongsToCurrentThread());
client_->timeChanged();
}
void WebMediaPlayerImpl::OnPipelineError(PipelineStatus error) {
DCHECK(main_loop_->BelongsToCurrentThread());
DCHECK_NE(error, media::PIPELINE_OK);
if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing) {
// Any error that occurs before reaching ReadyStateHaveMetadata should
// be considered a format error.
SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
// TODO(scherkus): This should be handled by HTMLMediaElement and controls
// should know when to invalidate themselves http://crbug.com/337015
InvalidateOnMainThread();
return;
}
SetNetworkState(PipelineErrorToNetworkState(error));
if (error == media::PIPELINE_ERROR_DECRYPT)
EmeUMAHistogramCounts(current_key_system_, "DecryptError", 1);
// TODO(scherkus): This should be handled by HTMLMediaElement and controls
// should know when to invalidate themselves http://crbug.com/337015
InvalidateOnMainThread();
}
void WebMediaPlayerImpl::OnPipelineMetadata(
media::PipelineMetadata metadata) {
DVLOG(1) << __FUNCTION__;
pipeline_metadata_ = metadata;
SetReadyState(WebMediaPlayer::ReadyStateHaveMetadata);
if (hasVideo()) {
DCHECK(!video_weblayer_);
video_weblayer_.reset(
new WebLayerImpl(cc::VideoLayer::Create(compositor_)));
video_weblayer_->setOpaque(opaque_);
client_->setWebLayer(video_weblayer_.get());
}
// TODO(scherkus): This should be handled by HTMLMediaElement and controls
// should know when to invalidate themselves http://crbug.com/337015
InvalidateOnMainThread();
}
void WebMediaPlayerImpl::OnPipelinePrerollCompleted() {
DVLOG(1) << __FUNCTION__;
// Only transition to ReadyStateHaveEnoughData if we don't have
// any pending seeks because the transition can cause Blink to
// report that the most recent seek has completed.
if (!pending_seek_) {
SetReadyState(WebMediaPlayer::ReadyStateHaveEnoughData);
// TODO(scherkus): This should be handled by HTMLMediaElement and controls
// should know when to invalidate themselves http://crbug.com/337015
InvalidateOnMainThread();
}
}
void WebMediaPlayerImpl::OnDemuxerOpened() {
DCHECK(main_loop_->BelongsToCurrentThread());
client_->mediaSourceOpened(new WebMediaSourceImpl(
chunk_demuxer_, base::Bind(&LogMediaSourceError, media_log_)));
}
void WebMediaPlayerImpl::OnKeyAdded(const std::string& session_id) {
DCHECK(main_loop_->BelongsToCurrentThread());
EmeUMAHistogramCounts(current_key_system_, "KeyAdded", 1);
client_->keyAdded(
WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
WebString::fromUTF8(session_id));
}
void WebMediaPlayerImpl::OnNeedKey(const std::string& type,
const std::vector<uint8>& init_data) {
DCHECK(main_loop_->BelongsToCurrentThread());
// Do not fire NeedKey event if encrypted media is not enabled.
if (!blink::WebRuntimeFeatures::isPrefixedEncryptedMediaEnabled() &&
!blink::WebRuntimeFeatures::isEncryptedMediaEnabled()) {
return;
}
UMA_HISTOGRAM_COUNTS(kMediaEme + std::string("NeedKey"), 1);
DCHECK(init_data_type_.empty() || type.empty() || type == init_data_type_);
if (init_data_type_.empty())
init_data_type_ = type;
const uint8* init_data_ptr = init_data.empty() ? NULL : &init_data[0];
client_->keyNeeded(
WebString::fromUTF8(type), init_data_ptr, init_data.size());
}
void WebMediaPlayerImpl::OnAddTextTrack(
const media::TextTrackConfig& config,
const media::AddTextTrackDoneCB& done_cb) {
DCHECK(main_loop_->BelongsToCurrentThread());
const WebInbandTextTrackImpl::Kind web_kind =
static_cast<WebInbandTextTrackImpl::Kind>(config.kind());
const blink::WebString web_label =
blink::WebString::fromUTF8(config.label());
const blink::WebString web_language =
blink::WebString::fromUTF8(config.language());
const blink::WebString web_id =
blink::WebString::fromUTF8(config.id());
scoped_ptr<WebInbandTextTrackImpl> web_inband_text_track(
new WebInbandTextTrackImpl(web_kind, web_label, web_language, web_id,
text_track_index_++));
scoped_ptr<media::TextTrack> text_track(
new TextTrackImpl(main_loop_, client_, web_inband_text_track.Pass()));
done_cb.Run(text_track.Pass());
}
void WebMediaPlayerImpl::OnKeyError(const std::string& session_id,
media::MediaKeys::KeyError error_code,
uint32 system_code) {
DCHECK(main_loop_->BelongsToCurrentThread());
EmeUMAHistogramEnumeration(current_key_system_, "KeyError",
error_code, media::MediaKeys::kMaxKeyError);
unsigned short short_system_code = 0;
if (system_code > std::numeric_limits<unsigned short>::max()) {
LOG(WARNING) << "system_code exceeds unsigned short limit.";
short_system_code = std::numeric_limits<unsigned short>::max();
} else {
short_system_code = static_cast<unsigned short>(system_code);
}
client_->keyError(
WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
WebString::fromUTF8(session_id),
static_cast<blink::WebMediaPlayerClient::MediaKeyErrorCode>(error_code),
short_system_code);
}
void WebMediaPlayerImpl::OnKeyMessage(const std::string& session_id,
const std::vector<uint8>& message,
const GURL& destination_url) {
DCHECK(main_loop_->BelongsToCurrentThread());
DCHECK(destination_url.is_empty() || destination_url.is_valid());
client_->keyMessage(
WebString::fromUTF8(GetPrefixedKeySystemName(current_key_system_)),
WebString::fromUTF8(session_id),
message.empty() ? NULL : &message[0],
message.size(),
destination_url);
}
void WebMediaPlayerImpl::DataSourceInitialized(bool success) {
DCHECK(main_loop_->BelongsToCurrentThread());
if (!success) {
SetNetworkState(WebMediaPlayer::NetworkStateFormatError);
// TODO(scherkus): This should be handled by HTMLMediaElement and controls
// should know when to invalidate themselves http://crbug.com/337015
InvalidateOnMainThread();
return;
}
StartPipeline();
}
void WebMediaPlayerImpl::NotifyDownloading(bool is_downloading) {
if (!is_downloading && network_state_ == WebMediaPlayer::NetworkStateLoading)
SetNetworkState(WebMediaPlayer::NetworkStateIdle);
else if (is_downloading && network_state_ == WebMediaPlayer::NetworkStateIdle)
SetNetworkState(WebMediaPlayer::NetworkStateLoading);
media_log_->AddEvent(
media_log_->CreateBooleanEvent(
media::MediaLogEvent::NETWORK_ACTIVITY_SET,
"is_downloading_data", is_downloading));
}
void WebMediaPlayerImpl::StartPipeline() {
DCHECK(main_loop_->BelongsToCurrentThread());
const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
// Keep track if this is a MSE or non-MSE playback.
UMA_HISTOGRAM_BOOLEAN("Media.MSE.Playback",
(load_type_ == LoadTypeMediaSource));
media::LogCB mse_log_cb;
// Figure out which demuxer to use.
if (load_type_ != LoadTypeMediaSource) {
DCHECK(!chunk_demuxer_);
DCHECK(data_source_);
demuxer_.reset(new media::FFmpegDemuxer(
media_loop_, data_source_.get(),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNeedKey),
media_log_));
} else {
DCHECK(!chunk_demuxer_);
DCHECK(!data_source_);
mse_log_cb = base::Bind(&LogMediaSourceError, media_log_);
chunk_demuxer_ = new media::ChunkDemuxer(
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDemuxerOpened),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnNeedKey),
mse_log_cb,
true);
demuxer_.reset(chunk_demuxer_);
}
scoped_ptr<media::FilterCollection> filter_collection(
new media::FilterCollection());
filter_collection->SetDemuxer(demuxer_.get());
media::SetDecryptorReadyCB set_decryptor_ready_cb =
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::SetDecryptorReadyCB);
// Create our audio decoders and renderer.
ScopedVector<media::AudioDecoder> audio_decoders;
audio_decoders.push_back(new media::FFmpegAudioDecoder(media_loop_,
mse_log_cb));
audio_decoders.push_back(new media::OpusAudioDecoder(media_loop_));
scoped_ptr<media::AudioRenderer> audio_renderer(new media::AudioRendererImpl(
media_loop_,
audio_source_provider_.get(),
audio_decoders.Pass(),
set_decryptor_ready_cb,
RenderThreadImpl::current()->GetAudioHardwareConfig()));
filter_collection->SetAudioRenderer(audio_renderer.Pass());
// Create our video decoders and renderer.
ScopedVector<media::VideoDecoder> video_decoders;
if (gpu_factories_.get()) {
video_decoders.push_back(
new media::GpuVideoDecoder(gpu_factories_, media_log_));
}
#if !defined(MEDIA_DISABLE_LIBVPX)
video_decoders.push_back(new media::VpxVideoDecoder(media_loop_));
#endif // !defined(MEDIA_DISABLE_LIBVPX)
video_decoders.push_back(new media::FFmpegVideoDecoder(media_loop_));
scoped_ptr<media::VideoRenderer> video_renderer(
new media::VideoRendererImpl(
media_loop_,
video_decoders.Pass(),
set_decryptor_ready_cb,
base::Bind(&WebMediaPlayerImpl::FrameReady, base::Unretained(this)),
true));
filter_collection->SetVideoRenderer(video_renderer.Pass());
if (cmd_line->HasSwitch(switches::kEnableInbandTextTracks)) {
scoped_ptr<media::TextRenderer> text_renderer(
new media::TextRenderer(
media_loop_,
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnAddTextTrack)));
filter_collection->SetTextRenderer(text_renderer.Pass());
}
// ... and we're ready to go!
seeking_ = true;
pipeline_.Start(
filter_collection.Pass(),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineEnded),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineError),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineSeek),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineMetadata),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelinePrerollCompleted),
BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnDurationChanged));
}
void WebMediaPlayerImpl::SetNetworkState(WebMediaPlayer::NetworkState state) {
DVLOG(1) << __FUNCTION__ << "(" << state << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
network_state_ = state;
// Always notify to ensure client has the latest value.
client_->networkStateChanged();
}
void WebMediaPlayerImpl::SetReadyState(WebMediaPlayer::ReadyState state) {
DVLOG(1) << __FUNCTION__ << "(" << state << ")";
DCHECK(main_loop_->BelongsToCurrentThread());
if (state == WebMediaPlayer::ReadyStateHaveEnoughData && data_source_ &&
data_source_->assume_fully_buffered() &&
network_state_ == WebMediaPlayer::NetworkStateLoading)
SetNetworkState(WebMediaPlayer::NetworkStateLoaded);
ready_state_ = state;
// Always notify to ensure client has the latest value.
client_->readyStateChanged();
}
blink::WebAudioSourceProvider* WebMediaPlayerImpl::audioSourceProvider() {
return audio_source_provider_.get();
}
void WebMediaPlayerImpl::IncrementExternallyAllocatedMemory() {
DCHECK(main_loop_->BelongsToCurrentThread());
incremented_externally_allocated_memory_ = true;
v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(
kPlayerExtraMemory);
}
double WebMediaPlayerImpl::GetPipelineDuration() const {
base::TimeDelta duration = pipeline_.GetMediaDuration();
// Return positive infinity if the resource is unbounded.
// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#dom-media-duration
if (duration == media::kInfiniteDuration())
return std::numeric_limits<double>::infinity();
return duration.InSecondsF();
}
void WebMediaPlayerImpl::OnDurationChanged() {
if (ready_state_ == WebMediaPlayer::ReadyStateHaveNothing)
return;
client_->durationChanged();
}
void WebMediaPlayerImpl::OnNaturalSizeChanged(gfx::Size size) {
DCHECK(main_loop_->BelongsToCurrentThread());
DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
TRACE_EVENT0("media", "WebMediaPlayerImpl::OnNaturalSizeChanged");
media_log_->AddEvent(
media_log_->CreateVideoSizeSetEvent(size.width(), size.height()));
pipeline_metadata_.natural_size = size;
client_->sizeChanged();
}
void WebMediaPlayerImpl::OnOpacityChanged(bool opaque) {
DCHECK(main_loop_->BelongsToCurrentThread());
DCHECK_NE(ready_state_, WebMediaPlayer::ReadyStateHaveNothing);
opaque_ = opaque;
if (video_weblayer_)
video_weblayer_->setOpaque(opaque_);
}
void WebMediaPlayerImpl::FrameReady(
const scoped_refptr<media::VideoFrame>& frame) {
compositor_task_runner_->PostTask(
FROM_HERE,
base::Bind(&VideoFrameCompositor::UpdateCurrentFrame,
base::Unretained(compositor_),
frame));
}
void WebMediaPlayerImpl::SetDecryptorReadyCB(
const media::DecryptorReadyCB& decryptor_ready_cb) {
DCHECK(main_loop_->BelongsToCurrentThread());
// Cancels the previous decryptor request.
if (decryptor_ready_cb.is_null()) {
if (!decryptor_ready_cb_.is_null())
base::ResetAndReturn(&decryptor_ready_cb_).Run(NULL);
return;
}
// TODO(xhwang): Support multiple decryptor notification request (e.g. from
// video and audio). The current implementation is okay for the current
// media pipeline since we initialize audio and video decoders in sequence.
// But WebMediaPlayerImpl should not depend on media pipeline's implementation
// detail.
DCHECK(decryptor_ready_cb_.is_null());
// Mixed use of prefixed and unprefixed EME APIs is disallowed by Blink.
DCHECK(!proxy_decryptor_ || !web_cdm_);
if (proxy_decryptor_) {
decryptor_ready_cb.Run(proxy_decryptor_->GetDecryptor());
return;
}
if (web_cdm_) {
decryptor_ready_cb.Run(web_cdm_->GetDecryptor());
return;
}
decryptor_ready_cb_ = decryptor_ready_cb;
}
static void GetCurrentFrameAndSignal(
VideoFrameCompositor* compositor,
scoped_refptr<media::VideoFrame>* video_frame_out,
base::WaitableEvent* event) {
TRACE_EVENT0("media", "GetCurrentFrameAndSignal");
*video_frame_out = compositor->GetCurrentFrame();
event->Signal();
}
scoped_refptr<media::VideoFrame>
WebMediaPlayerImpl::GetCurrentFrameFromCompositor() {
TRACE_EVENT0("media", "WebMediaPlayerImpl::GetCurrentFrameFromCompositor");
if (compositor_task_runner_->BelongsToCurrentThread())
return compositor_->GetCurrentFrame();
// Use a posted task and waitable event instead of a lock otherwise
// WebGL/Canvas can see different content than what the compositor is seeing.
scoped_refptr<media::VideoFrame> video_frame;
base::WaitableEvent event(false, false);
compositor_task_runner_->PostTask(FROM_HERE,
base::Bind(&GetCurrentFrameAndSignal,
base::Unretained(compositor_),
&video_frame,
&event));
event.Wait();
return video_frame;
}
} // namespace content