Update <video> implementation after new IRC discussion with Eric Carlsson.

    - move poster drawing on the WebKit side
    - get rid of the child views
    - add prepareToPlay method to the MediaPlayer iface.

Fixes http://b/issue?id=2156592

1 files changed, 108 insertions, 47 deletions

diff --git a/WebKit/android/WebCoreSupport/MediaPlayerPrivateAndroid.cpp b/WebKit/android/WebCoreSupport/MediaPlayerPrivateAndroid.cpp
index 1913aef..5ca6e83 100644
--- a/WebKit/android/WebCoreSupport/MediaPlayerPrivateAndroid.cpp
+++ b/WebKit/android/WebCoreSupport/MediaPlayerPrivateAndroid.cpp
@@ -27,12 +27,17 @@
 
 #if ENABLE(VIDEO)
 
+#include "GraphicsContext.h"
 #include "MediaPlayerPrivateAndroid.h"
+#include "SkiaUtils.h"
 #include "WebCoreJni.h"
 #include "WebViewCore.h"
 #include "jni_utility.h"
 
+#include <GraphicsJNI.h>
 #include <JNIHelp.h>
+#include <SkBitmap.h>
+
 using namespace android;
 
 namespace WebCore {
@@ -44,10 +49,8 @@ struct MediaPlayerPrivate::JavaGlue
     jobject   m_javaProxy;
     jmethodID m_getInstance;
     jmethodID m_play;
-    jmethodID m_createView;
-    jmethodID m_attachView;
-    jmethodID m_removeView;
-    jmethodID m_setPoster;
+    jmethodID m_teardown;
+    jmethodID m_loadPoster;
     jmethodID m_seek;
     jmethodID m_pause;
 };
@@ -57,7 +60,7 @@ MediaPlayerPrivate::~MediaPlayerPrivate()
     if (m_glue->m_javaProxy) {
         JNIEnv* env = JSC::Bindings::getJNIEnv();
         if (env) {
-            env->CallVoidMethod(m_glue->m_javaProxy, m_glue->m_removeView);
+            env->CallVoidMethod(m_glue->m_javaProxy, m_glue->m_teardown);
             env->DeleteGlobalRef(m_glue->m_javaProxy);
         }
     }
@@ -72,19 +75,7 @@ void MediaPlayerPrivate::registerMediaEngine(MediaEngineRegistrar registrar)
 
 void MediaPlayerPrivate::load(const String& url)
 {
-    // To be able to create our java player, we need a Context object. To get
-    // the Context object, we need a WebViewCore java object. To get a java
-    // WebViewCore object, we need a WebCore::FrameView pointer. To get
-    // the FrameView pointer, the MediaPlayer::setFrameView() must have been
-    // called. However, that method is called only after the MediaPlayerClient
-    // is called back and informed that enough data has been loaded.
-    // We therefore need to fake a readyStateChanged callback before creating
-    // the java player.
-    m_player->readyStateChanged();
-    // We now have a RenderVideo created and the MediaPlayer must have
-    // been updated with a FrameView. Create our JavaPlayer.
-    createJavaPlayerIfNeeded();
-    // Save the URl.
+    // Just save the URl.
     m_url = url;
 }
 
@@ -118,7 +109,7 @@ void MediaPlayerPrivate::pause()
 
 IntSize MediaPlayerPrivate::naturalSize() const
 {
-    return m_size;
+    return m_naturalSize;
 }
 
 bool MediaPlayerPrivate::hasVideo() const
@@ -126,8 +117,11 @@ bool MediaPlayerPrivate::hasVideo() const
     return false;
 }
 
-void MediaPlayerPrivate::setVisible(bool)
+void MediaPlayerPrivate::setVisible(bool visible)
 {
+    m_isVisible = visible;
+    if (m_isVisible)
+        createJavaPlayerIfNeeded();
 }
 
 float MediaPlayerPrivate::duration() const
@@ -156,7 +150,7 @@ bool MediaPlayerPrivate::seeking() const
     return false;
 }
 
-void MediaPlayerPrivate::setEndTime(float time)
+void MediaPlayerPrivate::setEndTime(float)
 {
 }
 
@@ -175,12 +169,12 @@ void MediaPlayerPrivate::setVolume(float)
 
 MediaPlayer::NetworkState MediaPlayerPrivate::networkState() const
 {
-    return MediaPlayer::Loaded;
+    return m_networkState;
 }
 
 MediaPlayer::ReadyState MediaPlayerPrivate::readyState() const
 {
-    return MediaPlayer::HaveEnoughData;
+    return m_readyState;
 }
 
 float MediaPlayerPrivate::maxTimeSeekable() const
@@ -214,25 +208,51 @@ void MediaPlayerPrivate::setSize(const IntSize&)
 
 void MediaPlayerPrivate::setPoster(const String& url)
 {
+    m_posterUrl = url;
     JNIEnv* env = JSC::Bindings::getJNIEnv();
-     if (!env)
-         return;
-     jstring jUrl = env->NewString((unsigned short *)url.characters(), url.length());
-     env->CallVoidMethod(m_glue->m_javaProxy, m_glue->m_setPoster, jUrl);
-     env->DeleteLocalRef(jUrl);
-     checkException(env);
+    if (!env || !m_glue->m_javaProxy || !m_posterUrl.length())
+        return;
+    // Send the poster
+    jstring jUrl = env->NewString((unsigned short *)m_posterUrl.characters(), m_posterUrl.length());
+    env->CallVoidMethod(m_glue->m_javaProxy, m_glue->m_loadPoster, jUrl);
+    env->DeleteLocalRef(jUrl);
+}
+
+void MediaPlayerPrivate::prepareToPlay() {
+    // We are about to start playing. Since our Java VideoView cannot
+    // buffer any data, we just simply transition to the HaveEnoughData
+    // state in here. This will allow the MediaPlayer to transition to
+    // the "play" state, at which point our VideoView will start downloading
+    // the content and start the playback.
+    m_networkState = MediaPlayer::Loaded;
+    m_player->networkStateChanged();
+    m_readyState = MediaPlayer::HaveEnoughData;
+    m_player->readyStateChanged();
 }
 
-void MediaPlayerPrivate::paint(GraphicsContext*, const IntRect& r)
+void MediaPlayerPrivate::paint(GraphicsContext* ctxt, const IntRect& r)
 {
-    createJavaPlayerIfNeeded();
-    JNIEnv* env = JSC::Bindings::getJNIEnv();
-    if (!env)
+    if (ctxt->paintingDisabled())
         return;
 
-    IntSize size = m_player->size();
-    env->CallVoidMethod(m_glue->m_javaProxy, m_glue->m_attachView,
-            r.x(), r.y(), size.width(), size.height());
+    if (!m_isVisible)
+        return;
+
+    if (!m_poster || (!m_poster->getPixels() && !m_poster->pixelRef()))
+        return;
+
+    SkCanvas*   canvas = ctxt->platformContext()->mCanvas;
+    // We paint with the following rules in mind:
+    // - only downscale the poster, never upscale
+    // - maintain the natural aspect ratio of the poster
+    // - the poster should be centered in the target rect
+    float originalRatio = static_cast<float>(m_poster->width()) / static_cast<float>(m_poster->height());
+    int posterWidth = r.width() > m_poster->width() ? m_poster->width() : r.width();
+    int posterHeight = posterWidth / originalRatio;
+    int posterX = ((r.width() - posterWidth) / 2) + r.x();
+    int posterY = ((r.height() - posterHeight) / 2) + r.y();
+    IntRect targetRect(posterX, posterY, posterWidth, posterHeight);
+    canvas->drawBitmapRect(*m_poster, 0, targetRect, 0);
 }
 
 MediaPlayerPrivateInterface* MediaPlayerPrivate::create(MediaPlayer* player)
@@ -250,7 +270,17 @@ MediaPlayer::SupportsType MediaPlayerPrivate::supportsType(const String& type, c
 }
 
 MediaPlayerPrivate::MediaPlayerPrivate(MediaPlayer* player)
-    : m_player(player), m_glue(NULL), m_duration(6000), m_size(100, 100), m_currentTime(0), m_paused(true)
+    : m_player(player),
+    m_glue(0),
+    m_duration(6000),
+    m_currentTime(0),
+    m_paused(true),
+    m_readyState(MediaPlayer::HaveNothing),
+    m_networkState(MediaPlayer::Empty),
+    m_poster(0),
+    m_naturalSize(100, 100),
+    m_naturalSizeUnknown(true),
+    m_isVisible(false)
 {
     JNIEnv* env = JSC::Bindings::getJNIEnv();
     if (!env)
@@ -263,10 +293,8 @@ MediaPlayerPrivate::MediaPlayerPrivate(MediaPlayer* player)
     m_glue = new JavaGlue;
     m_glue->m_getInstance = env->GetStaticMethodID(clazz, "getInstance", "(Landroid/webkit/WebViewCore;I)Landroid/webkit/HTML5VideoViewProxy;");
     m_glue->m_play = env->GetMethodID(clazz, "play", "(Ljava/lang/String;)V");
-    m_glue->m_createView = env->GetMethodID(clazz, "createView", "()V");
-    m_glue->m_attachView = env->GetMethodID(clazz, "attachView", "(IIII)V");
-    m_glue->m_removeView = env->GetMethodID(clazz, "removeView", "()V");
-    m_glue->m_setPoster = env->GetMethodID(clazz, "loadPoster", "(Ljava/lang/String;)V");
+    m_glue->m_teardown = env->GetMethodID(clazz, "teardown", "()V");
+    m_glue->m_loadPoster = env->GetMethodID(clazz, "loadPoster", "(Ljava/lang/String;)V");
     m_glue->m_seek = env->GetMethodID(clazz, "seek", "(I)V");
     m_glue->m_pause = env->GetMethodID(clazz, "pause", "()V");
     m_glue->m_javaProxy = NULL;
@@ -299,8 +327,14 @@ void MediaPlayerPrivate::createJavaPlayerIfNeeded()
     // Get the HTML5VideoViewProxy instance
     jobject obj = env->CallStaticObjectMethod(clazz, m_glue->m_getInstance, webViewCore->getJavaObject().get(), this);
     m_glue->m_javaProxy = env->NewGlobalRef(obj);
-    // Create our VideoView object.
-    env->CallVoidMethod(obj, m_glue->m_createView);
+    // Send the poster
+    jstring jUrl = 0;
+    if (m_posterUrl.length())
+        jUrl = env->NewString((unsigned short *)m_posterUrl.characters(), m_posterUrl.length());
+    // Sending a NULL jUrl allows the Java side to try to load the default poster.
+    env->CallVoidMethod(m_glue->m_javaProxy, m_glue->m_loadPoster, jUrl);
+    if (jUrl)
+        env->DeleteLocalRef(jUrl);
     // Clean up.
     env->DeleteLocalRef(obj);
     env->DeleteLocalRef(clazz);
@@ -309,17 +343,31 @@ void MediaPlayerPrivate::createJavaPlayerIfNeeded()
 
 void MediaPlayerPrivate::onPrepared(int duration, int width, int height) {
     m_duration = duration / 1000.0f;
-    m_size = IntSize(width, height);
+    m_naturalSize = IntSize(width, height);
+    m_naturalSizeUnknown = false;
     m_player->durationChanged();
     m_player->sizeChanged();
 }
 
 void MediaPlayerPrivate::onEnded() {
     m_paused = true;
-    m_currentTime = m_duration;
-    m_player->timeChanged();
-    // Reset to 0.
     m_currentTime = 0;
+    m_networkState = MediaPlayer::Idle;
+    m_readyState = MediaPlayer::HaveNothing;
+}
+
+void MediaPlayerPrivate::onPosterFetched(SkBitmap* poster) {
+    m_poster = poster;
+    if (m_naturalSizeUnknown) {
+        // We had to fake the size at startup, or else our paint
+        // method would not be called. If we haven't yet received
+        // the onPrepared event, update the intrinsic size to the size
+        // of the poster. That will be overriden when onPrepare comes.
+        // In case of an error, we should report the poster size, rather
+        // than our initial fake value.
+        m_naturalSize = IntSize(poster->width(), poster->height());
+        m_player->sizeChanged();
+    }
 }
 
 }
@@ -340,6 +388,17 @@ static void OnEnded(JNIEnv* env, jobject obj, int pointer) {
     }
 }
 
+static void OnPosterFetched(JNIEnv* env, jobject obj, jobject poster, int pointer) {
+    if (!pointer || !poster)
+        return;
+
+    WebCore::MediaPlayerPrivate* player = reinterpret_cast<WebCore::MediaPlayerPrivate*>(pointer);
+    SkBitmap* posterNative = GraphicsJNI::getNativeBitmap(env, poster);
+    if (!posterNative)
+        return;
+    player->onPosterFetched(posterNative);
+}
+
 /*
  * JNI registration
  */
@@ -348,6 +407,8 @@ static JNINativeMethod g_MediaPlayerMethods[] = {
         (void*) OnPrepared },
     { "nativeOnEnded", "(I)V",
         (void*) OnEnded },
+    { "nativeOnPosterFetched", "(Landroid/graphics/Bitmap;I)V",
+        (void*) OnPosterFetched },
 };
 
 int register_mediaplayer(JNIEnv* env)