Chromecast: adds interfaces for hardware layer of CMA pipeline.

chromecast/media/cma/backend/media_pipeline_device_fake.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chromecast/media/cma/backend/media_pipeline_device_fake.h"
+
+#include <list>
+
+#include "base/bind.h"
+#include "base/callback_helpers.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/macros.h"
+#include "base/message_loop/message_loop_proxy.h"
+#include "chromecast/media/cma/backend/audio_pipeline_device.h"
+#include "chromecast/media/cma/backend/media_clock_device.h"
+#include "chromecast/media/cma/backend/media_component_device.h"
+#include "chromecast/media/cma/backend/video_pipeline_device.h"
+#include "chromecast/media/cma/base/decoder_buffer_base.h"
+#include "media/base/audio_decoder_config.h"
+#include "media/base/buffers.h"
+#include "media/base/video_decoder_config.h"
+
+namespace chromecast {
+namespace media {
+
+class MediaClockDeviceFake : public MediaClockDevice {
+ public:
+  MediaClockDeviceFake();
+  virtual ~MediaClockDeviceFake();
+
+  // MediaClockDevice implementation.
+  virtual State GetState() const override;
+  virtual bool SetState(State new_state) override;
+  virtual bool ResetTimeline(base::TimeDelta time) override;
+  virtual bool SetRate(float rate) override;
+  virtual base::TimeDelta GetTime() override;
+
+ private:
+  State state_;
+
+  // Media time sampled at STC time |stc_|.
+  base::TimeDelta media_time_;
+  base::TimeTicks stc_;
+
+  float rate_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaClockDeviceFake);
+};
+
+MediaClockDeviceFake::MediaClockDeviceFake()
+    : state_(kStateUninitialized),
+      media_time_(::media::kNoTimestamp()) {
+  DetachFromThread();
+}
+
+MediaClockDeviceFake::~MediaClockDeviceFake() {
+}
+
+MediaClockDevice::State MediaClockDeviceFake::GetState() const {
+  DCHECK(CalledOnValidThread());
+  return state_;
+}
+
+bool MediaClockDeviceFake::SetState(State new_state) {
+  DCHECK(CalledOnValidThread());
+  if (!MediaClockDevice::IsValidStateTransition(state_, new_state))
+    return false;
+
+  if (new_state == state_)
+    return true;
+
+  state_ = new_state;
+
+  if (state_ == kStateRunning) {
+    stc_ = base::TimeTicks::Now();
+    DCHECK(media_time_ != ::media::kNoTimestamp());
+    return true;
+  }
+
+  if (state_ == kStateIdle) {
+    media_time_ = ::media::kNoTimestamp();
+    return true;
+  }
+
+  return true;
+}
+
+bool MediaClockDeviceFake::ResetTimeline(base::TimeDelta time) {
+  DCHECK(CalledOnValidThread());
+  DCHECK_EQ(state_, kStateIdle);
+  media_time_ = time;
+  return true;
+}
+
+bool MediaClockDeviceFake::SetRate(float rate) {
+  DCHECK(CalledOnValidThread());
+  if (state_ == kStateRunning) {
+    base::TimeTicks now = base::TimeTicks::Now();
+    media_time_ = media_time_ + (now - stc_) * rate_;
+    stc_ = now;
+  }
+
+  rate_ = rate;
+  return true;
+}
+
+base::TimeDelta MediaClockDeviceFake::GetTime() {
+  DCHECK(CalledOnValidThread());
+  if (state_ != kStateRunning)
+    return media_time_;
+
+  if (media_time_ == ::media::kNoTimestamp())
+    return ::media::kNoTimestamp();
+
+  base::TimeTicks now = base::TimeTicks::Now();
+  base::TimeDelta interpolated_media_time =
+      media_time_ + (now - stc_) * rate_;
+  return interpolated_media_time;
+}
+
+
+namespace {
+
+// Maximum number of frames that can be buffered.
+const size_t kMaxFrameCount = 20;
+
+}  // namespace
+
+class MediaComponentDeviceFake : public MediaComponentDevice {
+ public:
+  explicit MediaComponentDeviceFake(MediaClockDeviceFake* media_clock_device);
+  virtual ~MediaComponentDeviceFake();
+
+  // MediaComponentDevice implementation.
+  virtual void SetClient(const Client& client) override;
+  virtual State GetState() const override;
+  virtual bool SetState(State new_state) override;
+  virtual bool SetStartPts(base::TimeDelta time) override;
+  virtual FrameStatus PushFrame(
+      const scoped_refptr<DecryptContext>& decrypt_context,
+      const scoped_refptr<DecoderBufferBase>& buffer,
+      const FrameStatusCB& completion_cb) override;
+  virtual base::TimeDelta GetRenderingTime() const override;
+  virtual base::TimeDelta GetRenderingDelay() const override;
+  virtual bool GetStatistics(Statistics* stats) const override;
+
+ private:
+  struct FakeDecoderBuffer {
+    FakeDecoderBuffer();
+    ~FakeDecoderBuffer();
+
+    // Buffer size.
+    size_t size;
+
+    // Presentation timestamp.
+    base::TimeDelta pts;
+  };
+
+  void RenderTask();
+
+  MediaClockDeviceFake* const media_clock_device_;
+  Client client_;
+
+  State state_;
+
+  // Indicate whether the end of stream has been received.
+  bool is_eos_;
+
+  // Media time of the last rendered audio sample.
+  base::TimeDelta rendering_time_;
+
+  // Frame decoded/rendered since the pipeline left the idle state.
+  uint64 decoded_frame_count_;
+  uint64 decoded_byte_count_;
+
+  // List of frames not rendered yet.
+  std::list<FakeDecoderBuffer> frames_;
+
+  // Indicate whether there is a scheduled rendering task.
+  bool scheduled_rendering_task_;
+
+  // Pending frame.
+  scoped_refptr<DecoderBufferBase> pending_buffer_;
+  FrameStatusCB frame_pushed_cb_;
+
+  base::WeakPtr<MediaComponentDeviceFake> weak_this_;
+  base::WeakPtrFactory<MediaComponentDeviceFake> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaComponentDeviceFake);
+};
+
+MediaComponentDeviceFake::FakeDecoderBuffer::FakeDecoderBuffer()
+  : size(0) {
+}
+
+MediaComponentDeviceFake::FakeDecoderBuffer::~FakeDecoderBuffer() {
+}
+
+MediaComponentDeviceFake::MediaComponentDeviceFake(
+    MediaClockDeviceFake* media_clock_device)
+    : media_clock_device_(media_clock_device),
+      state_(kStateUninitialized),
+      rendering_time_(::media::kNoTimestamp()),
+      decoded_frame_count_(0),
+      decoded_byte_count_(0),
+      scheduled_rendering_task_(false),
+      weak_factory_(this) {
+  weak_this_ = weak_factory_.GetWeakPtr();
+  DetachFromThread();
+}
+
+MediaComponentDeviceFake::~MediaComponentDeviceFake() {
+}
+
+void MediaComponentDeviceFake::SetClient(const Client& client) {
+  DCHECK(CalledOnValidThread());
+  client_ = client;
+}
+
+MediaComponentDevice::State MediaComponentDeviceFake::GetState() const {
+  DCHECK(CalledOnValidThread());
+  return state_;
+}
+
+bool MediaComponentDeviceFake::SetState(State new_state) {
+  DCHECK(CalledOnValidThread());
+  if (!MediaComponentDevice::IsValidStateTransition(state_, new_state))
+    return false;
+  state_ = new_state;
+
+  if (state_ == kStateIdle) {
+    // Back to the idle state: reset a bunch of parameters.
+    is_eos_ = false;
+    rendering_time_ = ::media::kNoTimestamp();
+    decoded_frame_count_ = 0;
+    decoded_byte_count_ = 0;
+    frames_.clear();
+    pending_buffer_ = scoped_refptr<DecoderBufferBase>();
+    frame_pushed_cb_.Reset();
+    return true;
+  }
+
+  if (state_ == kStateRunning) {
+    if (!scheduled_rendering_task_) {
+      scheduled_rendering_task_ = true;
+      base::MessageLoopProxy::current()->PostTask(
+          FROM_HERE,
+          base::Bind(&MediaComponentDeviceFake::RenderTask, weak_this_));
+    }
+    return true;
+  }
+
+  return true;
+}
+
+bool MediaComponentDeviceFake::SetStartPts(base::TimeDelta time) {
+  DCHECK(CalledOnValidThread());
+  DCHECK_EQ(state_, kStateIdle);
+  rendering_time_ = time;
+  return true;
+}
+
+MediaComponentDevice::FrameStatus MediaComponentDeviceFake::PushFrame(
+    const scoped_refptr<DecryptContext>& decrypt_context,
+    const scoped_refptr<DecoderBufferBase>& buffer,
+    const FrameStatusCB& completion_cb) {
+  DCHECK(CalledOnValidThread());
+  DCHECK(state_ == kStatePaused || state_ == kStateRunning);
+  DCHECK(!is_eos_);
+  DCHECK(!pending_buffer_.get());
+  DCHECK(buffer.get());
+
+  if (buffer->end_of_stream()) {
+    is_eos_ = true;
+    return kFrameSuccess;
+  }
+
+  if (frames_.size() > kMaxFrameCount) {
+    pending_buffer_ = buffer;
+    frame_pushed_cb_ = completion_cb;
+    return kFramePending;
+  }
+
+  FakeDecoderBuffer fake_buffer;
+  fake_buffer.size = buffer->data_size();
+  fake_buffer.pts = buffer->timestamp();
+  frames_.push_back(fake_buffer);
+  return kFrameSuccess;
+}
+
+base::TimeDelta MediaComponentDeviceFake::GetRenderingTime() const {
+  return rendering_time_;
+}
+
+base::TimeDelta MediaComponentDeviceFake::GetRenderingDelay() const {
+  NOTIMPLEMENTED();
+  return ::media::kNoTimestamp();
+}
+
+void MediaComponentDeviceFake::RenderTask() {
+  scheduled_rendering_task_ = false;
+
+  if (state_ != kStateRunning)
+    return;
+
+  base::TimeDelta media_time = media_clock_device_->GetTime();
+  if (media_time == ::media::kNoTimestamp()) {
+    scheduled_rendering_task_ = true;
+    base::MessageLoopProxy::current()->PostDelayedTask(
+        FROM_HERE,
+        base::Bind(&MediaComponentDeviceFake::RenderTask, weak_this_),
+        base::TimeDelta::FromMilliseconds(50));
+    return;
+  }
+
+  while (!frames_.empty() && frames_.front().pts <= media_time) {
+    rendering_time_ = frames_.front().pts;
+    decoded_frame_count_++;
+    decoded_byte_count_ += frames_.front().size;
+    frames_.pop_front();
+    if (pending_buffer_.get()) {
+      FakeDecoderBuffer fake_buffer;
+      fake_buffer.size = pending_buffer_->data_size();
+      fake_buffer.pts = pending_buffer_->timestamp();
+      frames_.push_back(fake_buffer);
+      pending_buffer_ = scoped_refptr<DecoderBufferBase>();
+      base::ResetAndReturn(&frame_pushed_cb_).Run(kFrameSuccess);
+    }
+  }
+
+  if (frames_.empty() && is_eos_) {
+    if (!client_.eos_cb.is_null())
+      client_.eos_cb.Run();
+    return;
+  }
+
+  scheduled_rendering_task_ = true;
+  base::MessageLoopProxy::current()->PostDelayedTask(
+      FROM_HERE,
+      base::Bind(&MediaComponentDeviceFake::RenderTask, weak_this_),
+      base::TimeDelta::FromMilliseconds(50));
+}
+
+bool MediaComponentDeviceFake::GetStatistics(Statistics* stats) const {
+  if (state_ != kStateRunning)
+    return false;
+
+  // Note: what is returned here is not the number of samples but the number of
+  // frames. The value is different for audio.
+  stats->decoded_bytes = decoded_byte_count_;
+  stats->decoded_samples = decoded_frame_count_;
+  stats->dropped_samples = 0;
+  return true;
+}
+
+
+class AudioPipelineDeviceFake : public AudioPipelineDevice {
+ public:
+  explicit AudioPipelineDeviceFake(MediaClockDeviceFake* media_clock_device);
+  virtual ~AudioPipelineDeviceFake();
+
+  // AudioPipelineDevice implementation.
+  virtual void SetClient(const Client& client) override;
+  virtual State GetState() const override;
+  virtual bool SetState(State new_state) override;
+  virtual bool SetStartPts(base::TimeDelta time) override;
+  virtual FrameStatus PushFrame(
+      const scoped_refptr<DecryptContext>& decrypt_context,
+      const scoped_refptr<DecoderBufferBase>& buffer,
+      const FrameStatusCB& completion_cb) override;
+  virtual base::TimeDelta GetRenderingTime() const override;
+  virtual base::TimeDelta GetRenderingDelay() const override;
+  virtual bool SetConfig(const ::media::AudioDecoderConfig& config) override;
+  virtual void SetStreamVolumeMultiplier(float multiplier) override;
+  virtual bool GetStatistics(Statistics* stats) const override;
+
+ private:
+  scoped_ptr<MediaComponentDeviceFake> fake_pipeline_;
+
+  ::media::AudioDecoderConfig config_;
+
+  DISALLOW_COPY_AND_ASSIGN(AudioPipelineDeviceFake);
+};
+
+AudioPipelineDeviceFake::AudioPipelineDeviceFake(
+    MediaClockDeviceFake* media_clock_device)
+  : fake_pipeline_(new MediaComponentDeviceFake(media_clock_device)) {
+  DetachFromThread();
+}
+
+AudioPipelineDeviceFake::~AudioPipelineDeviceFake() {
+}
+
+void AudioPipelineDeviceFake::SetClient(const Client& client) {
+  fake_pipeline_->SetClient(client);
+}
+
+MediaComponentDevice::State AudioPipelineDeviceFake::GetState() const {
+  return fake_pipeline_->GetState();
+}
+
+bool AudioPipelineDeviceFake::SetState(State new_state) {
+  bool success = fake_pipeline_->SetState(new_state);
+  if (!success)
+    return false;
+
+  if (new_state == kStateIdle) {
+    DCHECK(config_.IsValidConfig());
+  }
+  if (new_state == kStateUninitialized) {
+    config_ = ::media::AudioDecoderConfig();
+  }
+  return true;
+}
+
+bool AudioPipelineDeviceFake::SetStartPts(base::TimeDelta time) {
+  return fake_pipeline_->SetStartPts(time);
+}
+
+MediaComponentDevice::FrameStatus AudioPipelineDeviceFake::PushFrame(
+    const scoped_refptr<DecryptContext>& decrypt_context,
+    const scoped_refptr<DecoderBufferBase>& buffer,
+    const FrameStatusCB& completion_cb) {
+  return fake_pipeline_->PushFrame(decrypt_context, buffer, completion_cb);
+}
+
+base::TimeDelta AudioPipelineDeviceFake::GetRenderingTime() const {
+  return fake_pipeline_->GetRenderingTime();
+}
+
+base::TimeDelta AudioPipelineDeviceFake::GetRenderingDelay() const {
+  return fake_pipeline_->GetRenderingDelay();
+}
+
+bool AudioPipelineDeviceFake::SetConfig(
+    const ::media::AudioDecoderConfig& config) {
+  DCHECK(CalledOnValidThread());
+  if (!config.IsValidConfig())
+    return false;
+  config_ = config;
+  return true;
+}
+
+void AudioPipelineDeviceFake::SetStreamVolumeMultiplier(float multiplier) {
+  DCHECK(CalledOnValidThread());
+}
+
+bool AudioPipelineDeviceFake::GetStatistics(Statistics* stats) const {
+  return fake_pipeline_->GetStatistics(stats);
+}
+
+
+class VideoPipelineDeviceFake : public VideoPipelineDevice {
+ public:
+  explicit VideoPipelineDeviceFake(MediaClockDeviceFake* media_clock_device);
+  virtual ~VideoPipelineDeviceFake();
+
+  // VideoPipelineDevice implementation.
+  virtual void SetClient(const Client& client) override;
+  virtual State GetState() const override;
+  virtual bool SetState(State new_state) override;
+  virtual bool SetStartPts(base::TimeDelta time) override;
+  virtual FrameStatus PushFrame(
+      const scoped_refptr<DecryptContext>& decrypt_context,
+      const scoped_refptr<DecoderBufferBase>& buffer,
+      const FrameStatusCB& completion_cb) override;
+  virtual base::TimeDelta GetRenderingTime() const override;
+  virtual base::TimeDelta GetRenderingDelay() const override;
+  virtual void SetVideoClient(const VideoClient& client) override;
+  virtual bool SetConfig(const ::media::VideoDecoderConfig& config) override;
+  virtual bool GetStatistics(Statistics* stats) const override;
+
+ private:
+  scoped_ptr<MediaComponentDeviceFake> fake_pipeline_;
+
+  ::media::VideoDecoderConfig config_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoPipelineDeviceFake);
+};
+
+VideoPipelineDeviceFake::VideoPipelineDeviceFake(
+    MediaClockDeviceFake* media_clock_device)
+  : fake_pipeline_(new MediaComponentDeviceFake(media_clock_device)) {
+  DetachFromThread();
+}
+
+VideoPipelineDeviceFake::~VideoPipelineDeviceFake() {
+}
+
+void VideoPipelineDeviceFake::SetClient(const Client& client) {
+  fake_pipeline_->SetClient(client);
+}
+
+MediaComponentDevice::State VideoPipelineDeviceFake::GetState() const {
+  return fake_pipeline_->GetState();
+}
+
+bool VideoPipelineDeviceFake::SetState(State new_state) {
+  bool success = fake_pipeline_->SetState(new_state);
+  if (!success)
+    return false;
+
+  if (new_state == kStateIdle) {
+    DCHECK(config_.IsValidConfig());
+  }
+  if (new_state == kStateUninitialized) {
+    config_ = ::media::VideoDecoderConfig();
+  }
+  return true;
+}
+
+bool VideoPipelineDeviceFake::SetStartPts(base::TimeDelta time) {
+  return fake_pipeline_->SetStartPts(time);
+}
+
+MediaComponentDevice::FrameStatus VideoPipelineDeviceFake::PushFrame(
+    const scoped_refptr<DecryptContext>& decrypt_context,
+    const scoped_refptr<DecoderBufferBase>& buffer,
+    const FrameStatusCB& completion_cb) {
+  return fake_pipeline_->PushFrame(decrypt_context, buffer, completion_cb);
+}
+
+base::TimeDelta VideoPipelineDeviceFake::GetRenderingTime() const {
+  return fake_pipeline_->GetRenderingTime();
+}
+
+base::TimeDelta VideoPipelineDeviceFake::GetRenderingDelay() const {
+  return fake_pipeline_->GetRenderingDelay();
+}
+
+void VideoPipelineDeviceFake::SetVideoClient(const VideoClient& client) {
+}
+
+bool VideoPipelineDeviceFake::SetConfig(
+    const ::media::VideoDecoderConfig& config) {
+  DCHECK(CalledOnValidThread());
+  if (!config.IsValidConfig())
+    return false;
+  config_ = config;
+  return true;
+}
+
+bool VideoPipelineDeviceFake::GetStatistics(Statistics* stats) const {
+  return fake_pipeline_->GetStatistics(stats);
+}
+
+
+MediaPipelineDeviceFake::MediaPipelineDeviceFake()
+    : media_clock_device_(new MediaClockDeviceFake()),
+      audio_pipeline_device_(
+          new AudioPipelineDeviceFake(media_clock_device_.get())),
+      video_pipeline_device_(
+          new VideoPipelineDeviceFake(media_clock_device_.get())) {
+}
+
+MediaPipelineDeviceFake::~MediaPipelineDeviceFake() {
+}
+
+AudioPipelineDevice* MediaPipelineDeviceFake::GetAudioPipelineDevice() const {
+  return audio_pipeline_device_.get();
+}
+
+VideoPipelineDevice* MediaPipelineDeviceFake::GetVideoPipelineDevice() const {
+  return video_pipeline_device_.get();
+}
+
+MediaClockDevice* MediaPipelineDeviceFake::GetMediaClockDevice() const {
+  return media_clock_device_.get();
+}
+
+}  // namespace media
+}  // namespace chromecast