MediaUrlInterceptor for embedders to handle custom urls.

media/base/android/media_player_bridge.cc

Index: media/base/android/media_player_bridge.cc
diff --git a/media/base/android/media_player_bridge.cc b/media/base/android/media_player_bridge.cc
index f07f11e3851c62c2670cfd325f5ba0741bde8771..469409d373cfea85e7961d96f65d336b83c8869e 100644
--- a/media/base/android/media_player_bridge.cc
+++ b/media/base/android/media_player_bridge.cc
@@ -13,6 +13,7 @@
 #include "jni/MediaPlayerBridge_jni.h"
 #include "media/base/android/media_player_manager.h"
 #include "media/base/android/media_resource_getter.h"
+#include "media/base/android/media_url_interceptor.h"
 
 using base::android::ConvertUTF8ToJavaString;
 using base::android::ScopedJavaLocalRef;
@@ -164,30 +165,43 @@ void MediaPlayerBridge::SetDataSource(const std::string& url) {
   JNIEnv* env = base::android::AttachCurrentThread();
   CHECK(env);
 
-  // Create a Java String for the URL.
-  ScopedJavaLocalRef<jstring> j_url_string = ConvertUTF8ToJavaString(env, url);
-  ScopedJavaLocalRef<jstring> j_cookies = ConvertUTF8ToJavaString(
-      env, cookies_);
-  ScopedJavaLocalRef<jstring> j_user_agent = ConvertUTF8ToJavaString(
-      env, user_agent_);
+  int fd;
+  int64 offset;
+  int64 size;
+  if (InterceptMediaUrl(url, &fd, &offset, &size)) {
+    if (!Java_MediaPlayerBridge_setDataSourceFromFd(
+        env, j_media_player_bridge_.obj(), fd, offset, size)) {
+      OnMediaError(MEDIA_ERROR_FORMAT);
+      return;
+    }
+  } else {
+    // Create a Java String for the URL.
+    ScopedJavaLocalRef<jstring> j_url_string =
+        ConvertUTF8ToJavaString(env, url);
+
+    jobject j_context = base::android::GetApplicationContext();
+    DCHECK(j_context);
+
+    const std::string data_uri_prefix("data:");
+    if (StartsWithASCII(url, data_uri_prefix, true)) {
+      if (!Java_MediaPlayerBridge_setDataUriDataSource(
+          env, j_media_player_bridge_.obj(), j_context, j_url_string.obj())) {
+        OnMediaError(MEDIA_ERROR_FORMAT);
+      }
+      return;
+    }
 
-  jobject j_context = base::android::GetApplicationContext();
-  DCHECK(j_context);
+    ScopedJavaLocalRef<jstring> j_cookies = ConvertUTF8ToJavaString(
+        env, cookies_);
+    ScopedJavaLocalRef<jstring> j_user_agent = ConvertUTF8ToJavaString(
+        env, user_agent_);
 
-  const std::string data_uri_prefix("data:");
-  if (StartsWithASCII(url, data_uri_prefix, true)) {
-    if (!Java_MediaPlayerBridge_setDataUriDataSource(
-        env, j_media_player_bridge_.obj(), j_context, j_url_string.obj())) {
+    if (!Java_MediaPlayerBridge_setDataSource(
+        env, j_media_player_bridge_.obj(), j_context, j_url_string.obj(),
+        j_cookies.obj(), j_user_agent.obj(), hide_url_log_)) {
       OnMediaError(MEDIA_ERROR_FORMAT);
+      return;
     }
-    return;
-  }
-
-  if (!Java_MediaPlayerBridge_setDataSource(
-      env, j_media_player_bridge_.obj(), j_context, j_url_string.obj(),
-      j_cookies.obj(), j_user_agent.obj(), hide_url_log_)) {
-    OnMediaError(MEDIA_ERROR_FORMAT);
-    return;
   }
 
   request_media_resources_cb_.Run(player_id());
@@ -195,6 +209,25 @@ void MediaPlayerBridge::SetDataSource(const std::string& url) {
     OnMediaError(MEDIA_ERROR_FORMAT);
 }
 
+bool MediaPlayerBridge::InterceptMediaUrl(
+    const std::string& url, int* fd, int64* offset, int64* size) {
+  // Sentinel value to check whether the output arguments have been set.
+  const int kUnsetValue = -1;
+
+  *fd = kUnsetValue;
+  *offset = kUnsetValue;
+  *size = kUnsetValue;
+  media::MediaUrlInterceptor* url_interceptor =
+      manager()->GetMediaUrlInterceptor();
+  if (url_interceptor && url_interceptor->Intercept(url, fd, offset, size)) {
+    DCHECK_NE(kUnsetValue, *fd);
+    DCHECK_NE(kUnsetValue, *offset);
+    DCHECK_NE(kUnsetValue, *size);
+    return true;
+  }
+  return false;
+}
+
 void MediaPlayerBridge::OnDidSetDataUriDataSource(JNIEnv* env, jobject obj,
     jboolean success) {
   if (!success) {
@@ -228,12 +261,20 @@ void MediaPlayerBridge::OnAuthCredentialsRetrieved(
 }
 
 void MediaPlayerBridge::ExtractMediaMetadata(const std::string& url) {
-  manager()->GetMediaResourceGetter()->ExtractMediaMetadata(
-      url,
-      cookies_,
-      user_agent_,
-      base::Bind(&MediaPlayerBridge::OnMediaMetadataExtracted,
-                 weak_factory_.GetWeakPtr()));
+  int fd;
+  int64 offset;
+  int64 size;
+  if (InterceptMediaUrl(url, &fd, &offset, &size)) {
+    manager()->GetMediaResourceGetter()->ExtractMediaMetadata(
+        fd, offset, size,
+        base::Bind(&MediaPlayerBridge::OnMediaMetadataExtracted,
+                   weak_factory_.GetWeakPtr()));
+  } else {
+    manager()->GetMediaResourceGetter()->ExtractMediaMetadata(
+        url, cookies_, user_agent_,
+        base::Bind(&MediaPlayerBridge::OnMediaMetadataExtracted,
+                   weak_factory_.GetWeakPtr()));
+  }
 }
 
 void MediaPlayerBridge::OnMediaMetadataExtracted(