[Chromecast] Use CMA backend on headless cast for Android

Use CMA backend media pipeline instead of spitzer on headless cast
receiver for Android.

BUG=Internal b/36179732

Review-Url: https://codereview.chromium.org/2746243002
Cr-Commit-Position: refs/heads/master@{#457497}

chromecast/BUILD.gn

@@ -447,7 +447,10 @@ action("chromecast_locales_pak") {
 
 buildflag_header("chromecast_features") {
   header = "chromecast_features.h"
-  flags = [ "IS_CAST_AUDIO_ONLY=$is_cast_audio_only" ]
+  flags = [
+    "IS_CAST_AUDIO_ONLY=$is_cast_audio_only",
+    "IS_CAST_USING_CMA_BACKEND=$is_cast_using_cma_backend",
+  ]
 }
 
 if (is_android) {

chromecast/browser/cast_browser_main_parts.cc

@@ -284,13 +284,13 @@ CastBrowserMainParts::CastBrowserMainParts(
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   AddDefaultCommandLineSwitches(command_line);
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   media_resource_tracker_ = nullptr;
-#endif  // !defined(OS_ANDROID)
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 }
 
 CastBrowserMainParts::~CastBrowserMainParts() {
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   if (media_thread_ && media_pipeline_backend_manager_) {
     // Make sure that media_pipeline_backend_manager_ is destroyed after any
     // pending media thread tasks. The CastAudioOutputStream implementation
@@ -306,14 +306,12 @@ CastBrowserMainParts::~CastBrowserMainParts() {
     media_thread_->task_runner()->DeleteSoon(
         FROM_HERE, media_pipeline_backend_manager_.release());
   }
-#endif  // !defined(OS_ANDROID)
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 CastBrowserMainParts::GetMediaTaskRunner() {
-#if defined(OS_ANDROID)
-  return nullptr;
-#else
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   if (!media_thread_) {
     media_thread_.reset(new base::Thread("CastMediaThread"));
     base::Thread::Options options;
@@ -321,10 +319,12 @@ CastBrowserMainParts::GetMediaTaskRunner() {
     CHECK(media_thread_->StartWithOptions(options));
   }
   return media_thread_->task_runner();
-#endif
+#else
+  return nullptr;
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 }
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 media::MediaResourceTracker* CastBrowserMainParts::media_resource_tracker() {
   if (!media_resource_tracker_) {
     media_resource_tracker_ = new media::MediaResourceTracker(
@@ -341,7 +341,7 @@ CastBrowserMainParts::media_pipeline_backend_manager() {
   }
   return media_pipeline_backend_manager_.get();
 }
-#endif
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 
 media::MediaCapsImpl* CastBrowserMainParts::media_caps() {
   return media_caps_.get();
@@ -495,7 +495,7 @@ void CastBrowserMainParts::PreMainMessageLoopRun() {
           video_plane_controller_.get(), window_manager_.get()));
   cast_browser_process_->cast_service()->Initialize();
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   media_resource_tracker()->InitializeMediaLib();
 #endif
   ::media::InitializeMediaLibrary();

chromecast/browser/cast_browser_main_parts.h

@@ -9,6 +9,8 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "build/buildflag.h"
+#include "chromecast/chromecast_features.h"
 #include "content/public/browser/browser_main_parts.h"
 #include "content/public/common/main_function_params.h"
 
@@ -45,7 +47,7 @@ class CastBrowserMainParts : public content::BrowserMainParts {
 
   scoped_refptr<base::SingleThreadTaskRunner> GetMediaTaskRunner();
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   media::MediaResourceTracker* media_resource_tracker();
   media::MediaPipelineBackendManager* media_pipeline_backend_manager();
 #endif
@@ -70,7 +72,7 @@ class CastBrowserMainParts : public content::BrowserMainParts {
   std::unique_ptr<media::MediaCapsImpl> media_caps_;
   std::unique_ptr<CastWindowManager> window_manager_;
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   // CMA thread used by AudioManager, MojoRenderer, and MediaPipelineBackend.
   std::unique_ptr<base::Thread> media_thread_;
 

chromecast/browser/cast_content_browser_client.cc

@@ -71,10 +71,12 @@
 #if defined(OS_ANDROID)
 #include "components/cdm/browser/cdm_message_filter_android.h"
 #include "components/crash/content/browser/crash_dump_manager_android.h"
-#else
-#include "chromecast/media/cdm/cast_cdm_factory.h"
 #endif  // defined(OS_ANDROID)
 
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
+#include "chromecast/media/cdm/cast_cdm_factory.h"
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
+
 namespace chromecast {
 namespace shell {
 
@@ -146,7 +148,7 @@ media::VideoModeSwitcher* CastContentBrowserClient::GetVideoModeSwitcher() {
   return nullptr;
 }
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 media::VideoResolutionPolicy*
 CastContentBrowserClient::GetVideoResolutionPolicy() {
   return nullptr;
@@ -195,7 +197,7 @@ CastContentBrowserClient::CreateCdmFactory() {
 #endif  // defined(ENABLE_MOJO_MEDIA_IN_BROWSER_PROCESS)
   return nullptr;
 }
-#endif  // !defined(OS_ANDROID)
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
 
 media::MediaCapsImpl* CastContentBrowserClient::media_caps() {
   DCHECK(cast_browser_main_parts_);

chromecast/browser/cast_content_browser_client.h

@@ -13,6 +13,8 @@
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "build/build_config.h"
+#include "build/buildflag.h"
+#include "chromecast/chromecast_features.h"
 #include "content/public/browser/certificate_request_result_type.h"
 #include "content/public/browser/content_browser_client.h"
 
@@ -84,7 +86,7 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
 
   virtual media::VideoModeSwitcher* GetVideoModeSwitcher();
 
-#if !defined(OS_ANDROID)
+#if BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   // Gets object for enforcing video resolution policy restrictions.
   virtual media::VideoResolutionPolicy* GetVideoResolutionPolicy();
 
@@ -101,7 +103,7 @@ class CastContentBrowserClient : public content::ContentBrowserClient {
   ::media::ScopedAudioManagerPtr CreateAudioManager(
       ::media::AudioLogFactory* audio_log_factory) override;
   std::unique_ptr<::media::CdmFactory> CreateCdmFactory() override;
-#endif
+#endif  // BUILDFLAG(IS_CAST_USING_CMA_BACKEND)
   media::MediaCapsImpl* media_caps();
 
   // Invoked when the metrics client ID changes.

chromecast/media/cdm/BUILD.gn

@@ -3,6 +3,7 @@
 # found in the LICENSE file.
 
 import("//chromecast/chromecast.gni")
+import("//media/media_options.gni")
 
 source_set("cdm") {
   sources = [
@@ -15,7 +16,7 @@ source_set("cdm") {
     "//media",
   ]
 
-  if (!is_android) {
+  if (is_cast_using_cma_backend) {
     sources += [
       "cast_cdm.cc",
       "cast_cdm.h",
@@ -29,14 +30,14 @@ source_set("cdm") {
       "//chromecast/media/base",
       "//url:url",
     ]
-  } else {
-    if (use_playready) {
-      sources += [
-        "playready_drm_delegate_android.cc",
-        "playready_drm_delegate_android.h",
-      ]
+  }
+
+  if (is_android && use_playready) {
+    sources += [
+      "playready_drm_delegate_android.cc",
+      "playready_drm_delegate_android.h",
+    ]
 
-      deps += [ "//media/base/android" ]
-    }
+    deps += [ "//media/base/android" ]
   }
 }

chromecast/media/cma/backend/BUILD.gn

@@ -4,6 +4,7 @@
 
 import("//build/config/chromecast_build.gni")
 import("//chromecast/chromecast.gni")
+import("//media/media_options.gni")
 
 source_set("backend") {
   sources = [
@@ -26,7 +27,12 @@ source_set("backend") {
   ]
 
   if (is_android) {
-    deps += [ ":cast_media_android" ]
+    if (is_cast_using_cma_backend) {
+      # TODO(tsunghung): use the real implementation when it's done.
+      deps += [ ":default" ]
+    } else {
+      deps += [ ":cast_media_android" ]
+    }
   } else {
     deps += [ ":libcast_media_1.0" ]
   }

media/media_options.gni

@@ -60,6 +60,9 @@ declare_args() {
   # Enabled by default on the cast desktop implementation to allow unit tests of
   # MP2TS parsing support.
   enable_hls_sample_aes = proprietary_codecs && is_cast_desktop_build
+
+  # If true, use cast CMA backend instead of default chromium media pipeline.
+  is_cast_using_cma_backend = is_cast_audio_only || !is_android
 }
 
 # enable_hls_sample_aes can only be true if enable_mse_mpeg2ts_stream_parser is.
@@ -149,18 +152,19 @@ declare_args() {
   # Can be overridden by gn build arguments from the --args command line flag
   # for local testing.
   if (enable_mojo_media) {
-    if (is_android) {
+    if (is_chromecast && is_cast_using_cma_backend) {
       mojo_media_services = [
         "cdm",
-        "audio_decoder",
+        "renderer",
       ]
-      mojo_media_host = "gpu"
-    } else if (is_chromecast) {
+      mojo_media_host = "browser"
+    } else if (is_android) {
+      # Both chrome for Android and cast for ATV belongs to this case
       mojo_media_services = [
         "cdm",
-        "renderer",
+        "audio_decoder",
       ]
-      mojo_media_host = "browser"
+      mojo_media_host = "gpu"
     } else {
       mojo_media_services = [ "video_decoder" ]
       mojo_media_host = "gpu"