Revert of Revert of Chromecast: Play audio streams not supported by C…

…MA via default renderer (patchset chromium#1 id:1 of https://codereview.chromium.org/981473003/)

Reason for revert:
Hmmm... My revert did not fix the test, so I'm undoing it. :/

Original issue's description:
> Revert of Chromecast: Play audio streams not supported by CMA via default renderer (patchset chromium#5 id:70001 of https://codereview.chromium.org/973633002/)
>
> Reason for revert:
> Audio tests started failing consistently in the next build after this was checked in. See:
> https://build.chromium.org/p/chromium.mac/builders/Mac10.9%20Tests/builds/3762
>
> Not sure if this CL is the culprit, but seems the most likely one, so attempting a revert to see if it fixes the problem.
>
> Error:
> [ RUN      ] AudioRecorderTest.BasicRecordAndStop
> ../../components/audio_modem/audio_recorder_unittest.cc:203: Failure
> Value of: IsRecording()
> Actual: false
> Expected: true
> ../../components/audio_modem/audio_recorder_unittest.cc:208: Failure
> Value of: IsRecording()
> Actual: false
> Expected: true
> ../../components/audio_modem/audio_recorder_unittest.cc:213: Failure
> Value of: IsRecording()
> Actual: false
> Expected: true
> [  FAILED  ] AudioRecorderTest.BasicRecordAndStop (1292 ms)
>
> Original issue's description:
> > Chromecast: Play audio streams not supported by CMA via default renderer
> >
> > For Chromecast we want to choose which media renderer to use based on
> > the types of input content streams. We will use CMA media renderer for
> > media types that are supported by our hardware (H264, AAC, etc) and
> > will use the default media renderer for audio streams other than AAC
> > or Vorbis. This will allow us support software decoding of FLAC and
> > Opus via the default Chrome audio path.
> >
> > BUG=457959
> >
> > Committed: https://crrev.com/2e583073b996e66d62f709dd2ffde9e1ef58b276
> > Cr-Commit-Position: refs/heads/master@{#318941}
>
> TBR=gunsch@chromium.org,lcwu@chromium.org,dalecurtis@chromium.org,servolk@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=457959
>
> Committed: https://crrev.com/ee687fd9c6c2bc41642cd8b65de87fe548a3cf75
> Cr-Commit-Position: refs/heads/master@{#319033}

TBR=gunsch@chromium.org,lcwu@chromium.org,dalecurtis@chromium.org,servolk@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=457959

Review URL: https://codereview.chromium.org/967933003

Cr-Commit-Position: refs/heads/master@{#319046}

chromecast/chromecast.gyp

@@ -496,8 +496,8 @@
             'common/media/shared_memory_chunk.h',
             'renderer/media/audio_pipeline_proxy.cc',
             'renderer/media/audio_pipeline_proxy.h',
-            'renderer/media/cma_media_renderer_factory.cc',
-            'renderer/media/cma_media_renderer_factory.h',
+            'renderer/media/chromecast_media_renderer_factory.cc',
+            'renderer/media/chromecast_media_renderer_factory.h',
             'renderer/media/cma_message_filter_proxy.cc',
             'renderer/media/cma_message_filter_proxy.h',
             'renderer/media/media_channel_proxy.cc',

chromecast/media/base/switching_media_renderer.cc

@@ -0,0 +1,102 @@
+// Copyright 2015 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/base/switching_media_renderer.h"
+
+#include "base/logging.h"
+#include "media/base/audio_decoder_config.h"
+#include "media/base/demuxer_stream.h"
+#include "media/base/demuxer_stream_provider.h"
+
+namespace chromecast {
+namespace media {
+
+SwitchingMediaRenderer::SwitchingMediaRenderer(
+    scoped_ptr<::media::Renderer> default_renderer,
+    scoped_ptr<::media::Renderer> cma_renderer)
+    : default_renderer_(default_renderer.Pass()),
+    cma_renderer_(cma_renderer.Pass()) {
+      DCHECK(default_renderer_);
+      DCHECK(cma_renderer_);
+}
+
+SwitchingMediaRenderer::~SwitchingMediaRenderer() {
+}
+
+void SwitchingMediaRenderer::Initialize(
+    ::media::DemuxerStreamProvider* demuxer_stream_provider,
+    const base::Closure& init_cb,
+    const ::media::StatisticsCB& statistics_cb,
+    const ::media::BufferingStateCB& buffering_state_cb,
+    const ::media::Renderer::PaintCB& paint_cb,
+    const base::Closure& ended_cb,
+    const ::media::PipelineStatusCB& error_cb) {
+  // At this point the DemuxerStreamProvider should be fully initialized, so we
+  // have enough information to decide which renderer to use.
+  demuxer_stream_provider_ = demuxer_stream_provider;
+  DCHECK(demuxer_stream_provider_);
+  ::media::DemuxerStream* audio_stream =
+      demuxer_stream_provider_->GetStream(::media::DemuxerStream::AUDIO);
+  ::media::DemuxerStream* video_stream =
+      demuxer_stream_provider_->GetStream(::media::DemuxerStream::VIDEO);
+  if (audio_stream && !video_stream &&
+      audio_stream->audio_decoder_config().codec() != ::media::kCodecAAC &&
+      audio_stream->audio_decoder_config().codec() != ::media::kCodecVorbis) {
+    // We'll use the default Chrome media renderer with software audio decoding
+    cma_renderer_.reset();
+  } else {
+    // We'll use the CMA-based rendering with hardware decoding
+    default_renderer_.reset();
+  }
+
+  return GetRenderer()->Initialize(demuxer_stream_provider,
+                                   init_cb, statistics_cb, buffering_state_cb,
+                                   paint_cb, ended_cb, error_cb);
+}
+
+::media::Renderer* SwitchingMediaRenderer::GetRenderer() const {
+  DCHECK(default_renderer_ || cma_renderer_);
+  if (cma_renderer_)
+    return cma_renderer_.get();
+
+  DCHECK(default_renderer_);
+  return default_renderer_.get();
+}
+
+void SwitchingMediaRenderer::SetCdm(
+    ::media::CdmContext* cdm_context,
+    const ::media::CdmAttachedCB& cdm_attached_cb) {
+  GetRenderer()->SetCdm(cdm_context, cdm_attached_cb);
+}
+
+void SwitchingMediaRenderer::Flush(const base::Closure& flush_cb) {
+  GetRenderer()->Flush(flush_cb);
+}
+
+void SwitchingMediaRenderer::StartPlayingFrom(base::TimeDelta time) {
+  GetRenderer()->StartPlayingFrom(time);
+}
+
+void SwitchingMediaRenderer::SetPlaybackRate(float playback_rate)  {
+  GetRenderer()->SetPlaybackRate(playback_rate);
+}
+
+void SwitchingMediaRenderer::SetVolume(float volume)  {
+  GetRenderer()->SetVolume(volume);
+}
+
+base::TimeDelta SwitchingMediaRenderer::GetMediaTime()  {
+  return GetRenderer()->GetMediaTime();
+}
+
+bool SwitchingMediaRenderer::HasAudio() {
+  return GetRenderer()->HasAudio();
+}
+
+bool SwitchingMediaRenderer::HasVideo() {
+  return GetRenderer()->HasVideo();
+}
+
+}  // namespace media
+}  // namespace chromecast

chromecast/media/base/switching_media_renderer.h

@@ -0,0 +1,66 @@
+// Copyright 2015 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.
+
+#ifndef CHROMECAST_MEDIA_BASE_SWITCHING_MEDIA_RENDERER_H_
+#define CHROMECAST_MEDIA_BASE_SWITCHING_MEDIA_RENDERER_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "media/base/renderer.h"
+
+namespace media {
+class DemuxerStreamProvider;
+}
+
+namespace chromecast {
+namespace media {
+
+// Chromecast's custom media renderer which is capable of selecting an
+// appropriate media renderer at runtime depending on the content.
+// We'll look at media types of media streams present in DemuxerStreamProvider
+// and will use either CMA-based renderer (for media types that are supported by
+// our hardware decoder - H264 and VP8 video, AAC and Vorbis audio) or the
+// default Chrome media renderer (this will allow us to support audio codecs
+// like FLAC and Opus, which are decoded in software).
+class SwitchingMediaRenderer : public ::media::Renderer {
+ public:
+  SwitchingMediaRenderer(
+      scoped_ptr<::media::Renderer> default_renderer,
+      scoped_ptr<::media::Renderer> cma_renderer);
+  ~SwitchingMediaRenderer() override;
+
+  // ::media::Renderer implementation:
+  void Initialize(
+      ::media::DemuxerStreamProvider* demuxer_stream_provider,
+      const base::Closure& init_cb,
+      const ::media::StatisticsCB& statistics_cb,
+      const ::media::BufferingStateCB& buffering_state_cb,
+      const ::media::Renderer::PaintCB& paint_cb,
+      const base::Closure& ended_cb,
+      const ::media::PipelineStatusCB& error_cb) override;
+  void SetCdm(::media::CdmContext* cdm_context,
+              const ::media::CdmAttachedCB& cdm_attached_cb) override;
+  void Flush(const base::Closure& flush_cb) override;
+  void StartPlayingFrom(base::TimeDelta time) override;
+  void SetPlaybackRate(float playback_rate) override;
+  void SetVolume(float volume) override;
+  base::TimeDelta GetMediaTime() override;
+  bool HasAudio() override;
+  bool HasVideo() override;
+
+ private:
+  // Returns the pointer to the actual renderer being used
+  ::media::Renderer* GetRenderer() const;
+
+  ::media::DemuxerStreamProvider* demuxer_stream_provider_;
+  scoped_ptr<::media::Renderer> default_renderer_;
+  scoped_ptr<::media::Renderer> cma_renderer_;
+
+  DISALLOW_COPY_AND_ASSIGN(SwitchingMediaRenderer);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_MEDIA_BASE_SWITCHING_MEDIA_RENDERER_H_

chromecast/media/media.gyp

@@ -22,6 +22,8 @@
         'base/decrypt_context_clearkey.h',
         'base/key_systems_common.cc',
         'base/key_systems_common.h',
+        'base/switching_media_renderer.cc',
+        'base/switching_media_renderer.h',
       ],
       'conditions': [
         ['chromecast_branding=="Chrome"', {

chromecast/renderer/DEPS

@@ -6,6 +6,7 @@ include_rules = [
   "+components/network_hints/renderer",
   "+content/public/renderer",
   "+media/base",
+  "+media/renderers",
   "+third_party/WebKit/public/platform",
   "+third_party/WebKit/public/web",
 ]

chromecast/renderer/cast_content_renderer_client.cc

@@ -13,7 +13,7 @@
 #include "chromecast/renderer/cast_media_load_deferrer.h"
 #include "chromecast/renderer/cast_render_process_observer.h"
 #include "chromecast/renderer/key_systems_cast.h"
-#include "chromecast/renderer/media/cma_media_renderer_factory.h"
+#include "chromecast/renderer/media/chromecast_media_renderer_factory.h"
 #include "components/network_hints/renderer/prescient_networking_dispatcher.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/renderer/render_frame.h"
@@ -160,8 +160,8 @@ CastContentRendererClient::CreateMediaRendererFactory(
     return nullptr;
 
   return scoped_ptr<::media::RendererFactory>(
-      new chromecast::media::CmaMediaRendererFactory(
-          render_frame->GetRoutingID()));
+      new chromecast::media::ChromecastMediaRendererFactory(
+          media_log, render_frame->GetRoutingID()));
 }
 #endif
 

chromecast/renderer/media/chromecast_media_renderer_factory.cc

@@ -0,0 +1,73 @@
+// Copyright 2015 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/renderer/media/chromecast_media_renderer_factory.h"
+
+#include "base/command_line.h"
+#include "chromecast/media/base/switching_media_renderer.h"
+#include "chromecast/media/cma/filters/cma_renderer.h"
+#include "chromecast/renderer/media/media_pipeline_proxy.h"
+#include "content/public/renderer/render_thread.h"
+#include "media/base/audio_hardware_config.h"
+#include "media/base/media_log.h"
+#include "media/renderers/default_renderer_factory.h"
+
+namespace chromecast {
+namespace media {
+
+ChromecastMediaRendererFactory::ChromecastMediaRendererFactory(
+    const scoped_refptr<::media::MediaLog>& media_log,
+    int render_frame_id)
+    : render_frame_id_(render_frame_id),
+      media_log_(media_log) {
+}
+
+ChromecastMediaRendererFactory::~ChromecastMediaRendererFactory() {
+}
+
+scoped_ptr<::media::Renderer> ChromecastMediaRendererFactory::CreateRenderer(
+    const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+    ::media::AudioRendererSink* audio_renderer_sink) {
+  if (!default_render_factory_) {
+    // Chromecast doesn't have input audio devices, so leave this uninitialized
+    ::media::AudioParameters input_audio_params;
+    // TODO(servolk): Audio parameters are hardcoded for now, but in the future
+    // either we need to obtain AudioHardwareConfig from RenderThreadImpl,
+    // or media renderer needs to figure out optimal audio parameters itself.
+    const int kDefaultSamplingRate = 48000;
+    const int kDefaultBitsPerSample = 16;
+    // About 20ms of stereo (2 channels) 16bit (2 byte) audio
+    int buffer_size = kDefaultSamplingRate * 20 * 2 * 2 / 1000;
+    ::media::AudioParameters output_audio_params(
+        ::media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
+        ::media::CHANNEL_LAYOUT_STEREO,
+        kDefaultSamplingRate, kDefaultBitsPerSample,
+        buffer_size, ::media::AudioParameters::NO_EFFECTS);
+    ::media::AudioHardwareConfig audio_config(input_audio_params,
+                                              output_audio_params);
+
+    default_render_factory_.reset(new ::media::DefaultRendererFactory(
+        media_log_, /*gpu_factories*/ nullptr, audio_config));
+  }
+
+  DCHECK(default_render_factory_);
+  // TODO(erickung): crbug.com/443956. Need to provide right LoadType.
+  LoadType cma_load_type = kLoadTypeMediaSource;
+  scoped_ptr<MediaPipeline> cma_media_pipeline(
+      new MediaPipelineProxy(
+          render_frame_id_,
+          content::RenderThread::Get()->GetIOMessageLoopProxy(),
+          cma_load_type));
+  scoped_ptr<CmaRenderer> cma_renderer(
+      new CmaRenderer(cma_media_pipeline.Pass()));
+  scoped_ptr<::media::Renderer> default_media_render(
+      default_render_factory_->CreateRenderer(media_task_runner,
+                                              audio_renderer_sink));
+  scoped_ptr<SwitchingMediaRenderer> media_renderer(new SwitchingMediaRenderer(
+      default_media_render.Pass(), cma_renderer.Pass()));
+  return media_renderer.Pass();
+}
+
+}  // namespace media
+}  // namespace chromecast

chromecast/renderer/media/chromecast_media_renderer_factory.h

@@ -0,0 +1,43 @@
+// Copyright 2015 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.
+
+#ifndef CHROMECAST_RENDERER_MEDIA_CHROMECAST_MEDIA_RENDERER_FACTORY_H_
+#define CHROMECAST_RENDERER_MEDIA_CHROMECAST_MEDIA_RENDERER_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "media/base/renderer_factory.h"
+
+namespace media {
+class MediaLog;
+class DefaultRendererFactory;
+}
+
+namespace chromecast {
+namespace media {
+
+class ChromecastMediaRendererFactory : public ::media::RendererFactory {
+ public:
+  ChromecastMediaRendererFactory(
+      const scoped_refptr<::media::MediaLog>& media_log,
+      int render_frame_id);
+  ~ChromecastMediaRendererFactory() final;
+
+  // ::media::RendererFactory implementation.
+  scoped_ptr<::media::Renderer> CreateRenderer(
+      const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
+      ::media::AudioRendererSink* audio_renderer_sink) final;
+
+ private:
+  int render_frame_id_;
+  scoped_refptr<::media::MediaLog> media_log_;
+  scoped_ptr<::media::DefaultRendererFactory> default_render_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ChromecastMediaRendererFactory);
+};
+
+}  // namespace media
+}  // namespace chromecast
+
+#endif  // CHROMECAST_RENDERER_MEDIA_CHROMECAST_MEDIA_RENDERER_FACTORY_H_