Remove the dependency on encryptedmedia from HTMLMediaElement.

Source/modules/encryptedmedia/HTMLMediaElementEncryptedMedia.cpp

+// 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 "config.h"
+#include "modules/encryptedmedia/HTMLMediaElementEncryptedMedia.h"
+
+#include "RuntimeEnabledFeatures.h"
+#include "bindings/v8/ExceptionState.h"
+#include "core/dom/ExceptionCode.h"
+#include "core/html/HTMLMediaElement.h"
+#include "core/html/MediaKeyError.h"
+#include "core/html/MediaKeyEvent.h"
+#include "modules/encryptedmedia/MediaKeyNeededEvent.h"
+#include "modules/encryptedmedia/MediaKeys.h"
+#include "platform/Logging.h"
+
+namespace WebCore {
+
+static void throwExceptionForMediaKeyException(const String& keySystem, const String& sessionId, blink::WebMediaPlayer::MediaKeyException exception, ExceptionState& exceptionState)
+{
+    switch (exception) {
+    case blink::WebMediaPlayer::MediaKeyExceptionNoError:
+        return;
+    case blink::WebMediaPlayer::MediaKeyExceptionInvalidPlayerState:
+        exceptionState.throwDOMException(InvalidStateError, "The player is in an invalid state.");
+        return;
+    case blink::WebMediaPlayer::MediaKeyExceptionKeySystemNotSupported:
+        exceptionState.throwDOMException(NotSupportedError, "The key system provided ('" + keySystem +"') is not supported.");
+        return;
+    case blink::WebMediaPlayer::MediaKeyExceptionInvalidAccess:
+        exceptionState.throwDOMException(InvalidAccessError, "The session ID provided ('" + sessionId + "') is invalid.");
+        return;
+    }
+
+    ASSERT_NOT_REACHED();
+    return;
+}
+
+HTMLMediaElementEncryptedMedia::HTMLMediaElementEncryptedMedia()
+    : m_emeMode(EmeModeNotSelected)
+{
+}
+
+HTMLMediaElementEncryptedMedia::~HTMLMediaElementEncryptedMedia()
+{
+}
+
+const char* HTMLMediaElementEncryptedMedia::supplementName()
+{
+    return "HTMLMediaElementEncryptedMedia";
+}
+
+HTMLMediaElementEncryptedMedia& HTMLMediaElementEncryptedMedia::from(HTMLMediaElement& element)
+{
+    Supplement<HTMLMediaElement>* supplement = Supplement<HTMLMediaElement>::from(element, supplementName());
+    if (!supplement) {
+        supplement = new HTMLMediaElementEncryptedMedia();

[ddorwin, 2014/03/01 01:08:48]

Returning a reference to a value just created on the heap is weird. Who is going
to delete this? Is this common among Supplementables?

[c.shu, 2014/03/02 15:35:06]

The pointer is passed to provideTo() as a passOwnPtr and Supplementable saves it
in its map. I see all other instances of ::from() are coded in this way.

+        provideTo(element, supplementName(), adoptPtr(supplement));
+    }
+    return *static_cast<HTMLMediaElementEncryptedMedia*>(supplement);
+}
+
+bool HTMLMediaElementEncryptedMedia::setEmeMode(EmeMode emeMode, ExceptionState& exceptionState)
+{
+    if (m_emeMode != EmeModeNotSelected && m_emeMode != emeMode) {
+        exceptionState.throwDOMException(InvalidStateError, "Mixed use of EME prefixed and unprefixed API not allowed.");
+        return false;
+    }
+    m_emeMode = emeMode;
+    return true;
+}
+
+blink::WebContentDecryptionModule* HTMLMediaElementEncryptedMedia::contentDecryptionModule()
+{
+    return m_mediaKeys ? m_mediaKeys->contentDecryptionModule() : 0;
+}
+
+MediaKeys* HTMLMediaElementEncryptedMedia::mediaKeys(HTMLMediaElement& element)
+{
+    HTMLMediaElementEncryptedMedia& thisElement = HTMLMediaElementEncryptedMedia::from(element);
+    return thisElement.m_mediaKeys.get();
+}
+
+void HTMLMediaElementEncryptedMedia::setMediaKeysInternal(HTMLMediaElement& element, MediaKeys* mediaKeys)
+{
+    if (m_mediaKeys == mediaKeys)
+        return;
+
+    ASSERT(m_emeMode = EmeModeUnprefixed);
+
+    if (m_mediaKeys)
+        m_mediaKeys->setMediaElement(0);
+    m_mediaKeys = mediaKeys;
+    if (m_mediaKeys)
+        m_mediaKeys->setMediaElement(&element);
+
+    // If a player is connected, tell it that the CDM has changed.
+    if (element.webMediaPlayer())
+        element.webMediaPlayer()->setContentDecryptionModule(contentDecryptionModule());
+}
+
+void HTMLMediaElementEncryptedMedia::setMediaKeys(HTMLMediaElement& element, MediaKeys* mediaKeys, ExceptionState& exceptionState)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::setMediaKeys");
+    HTMLMediaElementEncryptedMedia& thisElement = HTMLMediaElementEncryptedMedia::from(element);
+
+    if (!thisElement.setEmeMode(EmeModeUnprefixed, exceptionState))
+        return;
+
+    thisElement.setMediaKeysInternal(element, mediaKeys);
+}
+
+// Create a MediaKeyNeededEvent for WD EME.
+static PassRefPtr<Event> createNeedKeyEvent(const String& contentType, const unsigned char* initData, unsigned initDataLength)
+{
+    MediaKeyNeededEventInit initializer;
+    initializer.contentType = contentType;
+    initializer.initData = Uint8Array::create(initData, initDataLength);
+    initializer.bubbles = false;
+    initializer.cancelable = false;
+
+    return MediaKeyNeededEvent::create(EventTypeNames::needkey, initializer);
+}
+
+// Create a 'needkey' MediaKeyEvent for v0.1b EME.
+static PassRefPtr<Event> createWebkitNeedKeyEvent(const String& contentType, const unsigned char* initData, unsigned initDataLength)
+{
+    MediaKeyEventInit webkitInitializer;
+    webkitInitializer.keySystem = String();
+    webkitInitializer.sessionId = String();
+    webkitInitializer.initData = Uint8Array::create(initData, initDataLength);
+    webkitInitializer.bubbles = false;
+    webkitInitializer.cancelable = false;
+
+    return MediaKeyEvent::create(EventTypeNames::webkitneedkey, webkitInitializer);
+}
+
+void HTMLMediaElementEncryptedMedia::webkitGenerateKeyRequest(HTMLMediaElement& element, const String& keySystem, PassRefPtr<Uint8Array> initData, ExceptionState& exceptionState)
+{
+    HTMLMediaElementEncryptedMedia::from(element).generateKeyRequest(element.player(), element.webMediaPlayer(), keySystem, initData, exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::generateKeyRequest(bool hasPlayer, blink::WebMediaPlayer* webMediaPlayer, const String& keySystem, PassRefPtr<Uint8Array> initData, ExceptionState& exceptionState)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::webkitGenerateKeyRequest");
+
+    if (!setEmeMode(EmeModePrefixed, exceptionState))
+        return;
+
+    if (keySystem.isEmpty()) {
+        exceptionState.throwDOMException(SyntaxError, "The key system provided is empty.");
+        return;
+    }
+
+    if (!hasPlayer) {

[ddorwin, 2014/03/01 01:08:48]

Reminder to myself: I still think we should get rid of this parameter. See
comments in the previous PS.

+        exceptionState.throwDOMException(InvalidStateError, "No media has been loaded.");
+        return;
+    }
+
+    const unsigned char* initDataPointer = 0;
+    unsigned initDataLength = 0;
+    if (initData) {
+        initDataPointer = initData->data();
+        initDataLength = initData->length();
+    }
+
+    blink::WebMediaPlayer::MediaKeyException result = webMediaPlayer ? webMediaPlayer->generateKeyRequest(keySystem, initDataPointer, initDataLength) : blink::WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
+    throwExceptionForMediaKeyException(keySystem, String(), result, exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::webkitGenerateKeyRequest(HTMLMediaElement& mediaElement, const String& keySystem, ExceptionState& exceptionState)
+{
+    webkitGenerateKeyRequest(mediaElement, keySystem, Uint8Array::create(0), exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::webkitAddKey(HTMLMediaElement& element, const String& keySystem, PassRefPtr<Uint8Array> key, PassRefPtr<Uint8Array> initData, const String& sessionId, ExceptionState& exceptionState)
+{
+    HTMLMediaElementEncryptedMedia::from(element).addKey(element.player(), element.webMediaPlayer(), keySystem, key, initData, sessionId, exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::addKey(bool hasPlayer, blink::WebMediaPlayer* webMediaPlayer, const String& keySystem, PassRefPtr<Uint8Array> key, PassRefPtr<Uint8Array> initData, const String& sessionId, ExceptionState& exceptionState)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::webkitAddKey");
+
+    if (!setEmeMode(EmeModePrefixed, exceptionState))
+        return;
+
+    if (keySystem.isEmpty()) {
+        exceptionState.throwDOMException(SyntaxError, "The key system provided is empty.");
+        return;
+    }
+
+    if (!key) {
+        exceptionState.throwDOMException(SyntaxError, "The key provided is invalid.");
+        return;
+    }
+
+    if (!key->length()) {
+        exceptionState.throwDOMException(TypeMismatchError, "The key provided is invalid.");
+        return;
+    }
+
+    if (!hasPlayer) {
+        exceptionState.throwDOMException(InvalidStateError, "No media has been loaded.");
+        return;
+    }
+
+    const unsigned char* initDataPointer = 0;
+    unsigned initDataLength = 0;
+    if (initData) {
+        initDataPointer = initData->data();
+        initDataLength = initData->length();
+    }
+
+    blink::WebMediaPlayer::MediaKeyException result = webMediaPlayer ? webMediaPlayer->addKey(keySystem, key->data(), key->length(), initDataPointer, initDataLength, sessionId) : blink::WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
+    throwExceptionForMediaKeyException(keySystem, sessionId, result, exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::webkitAddKey(HTMLMediaElement& mediaElement, const String& keySystem, PassRefPtr<Uint8Array> key, ExceptionState& exceptionState)
+{
+    webkitAddKey(mediaElement, keySystem, key, Uint8Array::create(0), String(), exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::webkitCancelKeyRequest(HTMLMediaElement& element, const String& keySystem, const String& sessionId, ExceptionState& exceptionState)
+{
+    HTMLMediaElementEncryptedMedia::from(element).cancelKeyRequest(element.player(), element.webMediaPlayer(), keySystem, sessionId, exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::cancelKeyRequest(bool hasPlayer, blink::WebMediaPlayer* webMediaPlayer, const String& keySystem, const String& sessionId, ExceptionState& exceptionState)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::webkitCancelKeyRequest");
+
+    if (!setEmeMode(EmeModePrefixed, exceptionState))
+        return;
+
+    if (keySystem.isEmpty()) {
+        exceptionState.throwDOMException(SyntaxError, "The key system provided is empty.");
+        return;
+    }
+
+    if (!hasPlayer) {
+        exceptionState.throwDOMException(InvalidStateError, "No media has been loaded.");
+        return;
+    }
+
+    blink::WebMediaPlayer::MediaKeyException result = webMediaPlayer ? webMediaPlayer->cancelKeyRequest(keySystem, sessionId) : blink::WebMediaPlayer::MediaKeyExceptionInvalidPlayerState;
+    throwExceptionForMediaKeyException(keySystem, sessionId, result, exceptionState);
+}
+
+void HTMLMediaElementEncryptedMedia::keyAdded(HTMLMediaElement& element, const String& keySystem, const String& sessionId)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::mediaPlayerKeyAdded");
+
+    MediaKeyEventInit initializer;
+    initializer.keySystem = keySystem;
+    initializer.sessionId = sessionId;
+    initializer.bubbles = false;
+    initializer.cancelable = false;
+
+    RefPtr<Event> event = MediaKeyEvent::create(EventTypeNames::webkitkeyadded, initializer);
+    event->setTarget(&element);
+    element.scheduleEvent(event.release());
+}
+
+void HTMLMediaElementEncryptedMedia::keyError(HTMLMediaElement& element, const String& keySystem, const String& sessionId, blink::WebMediaPlayerClient::MediaKeyErrorCode errorCode, unsigned short systemCode)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::mediaPlayerKeyError: sessionID=%s, errorCode=%d, systemCode=%d", sessionId.utf8().data(), errorCode, systemCode);
+
+    MediaKeyError::Code mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_UNKNOWN;
+    switch (errorCode) {
+    case blink::WebMediaPlayerClient::MediaKeyErrorCodeUnknown:
+        mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_UNKNOWN;
+        break;
+    case blink::WebMediaPlayerClient::MediaKeyErrorCodeClient:
+        mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_CLIENT;
+        break;
+    case blink::WebMediaPlayerClient::MediaKeyErrorCodeService:
+        mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_SERVICE;
+        break;
+    case blink::WebMediaPlayerClient::MediaKeyErrorCodeOutput:
+        mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_OUTPUT;
+        break;
+    case blink::WebMediaPlayerClient::MediaKeyErrorCodeHardwareChange:
+        mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_HARDWARECHANGE;
+        break;
+    case blink::WebMediaPlayerClient::MediaKeyErrorCodeDomain:
+        mediaKeyErrorCode = MediaKeyError::MEDIA_KEYERR_DOMAIN;
+        break;
+    }
+
+    MediaKeyEventInit initializer;
+    initializer.keySystem = keySystem;
+    initializer.sessionId = sessionId;
+    initializer.errorCode = MediaKeyError::create(mediaKeyErrorCode);
+    initializer.systemCode = systemCode;
+    initializer.bubbles = false;
+    initializer.cancelable = false;
+
+    RefPtr<Event> event = MediaKeyEvent::create(EventTypeNames::webkitkeyerror, initializer);
+    event->setTarget(&element);
+    element.scheduleEvent(event.release());
+}
+
+void HTMLMediaElementEncryptedMedia::keyMessage(HTMLMediaElement& element, const String& keySystem, const String& sessionId, const unsigned char* message, unsigned messageLength, const blink::WebURL& defaultURL)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::mediaPlayerKeyMessage: sessionID=%s", sessionId.utf8().data());
+
+    MediaKeyEventInit initializer;
+    initializer.keySystem = keySystem;
+    initializer.sessionId = sessionId;
+    initializer.message = Uint8Array::create(message, messageLength);
+    initializer.defaultURL = KURL(defaultURL);
+    initializer.bubbles = false;
+    initializer.cancelable = false;
+
+    RefPtr<Event> event = MediaKeyEvent::create(EventTypeNames::webkitkeymessage, initializer);
+    event->setTarget(&element);
+    element.scheduleEvent(event.release());
+}
+
+void HTMLMediaElementEncryptedMedia::keyNeeded(HTMLMediaElement& element, const String& contentType, const unsigned char* initData, unsigned initDataLength)
+{
+    WTF_LOG(Media, "HTMLMediaElementEncryptedMedia::mediaPlayerKeyNeeded: contentType=%s", contentType.utf8().data());
+
+    if (RuntimeEnabledFeatures::encryptedMediaEnabled()) {
+        // Send event for WD EME.
+        RefPtr<Event> event = createNeedKeyEvent(contentType, initData, initDataLength);
+        event->setTarget(&element);
+        element.scheduleEvent(event.release());
+    }
+
+    if (RuntimeEnabledFeatures::prefixedEncryptedMediaEnabled()) {
+        // Send event for v0.1b EME.
+        RefPtr<Event> event = createWebkitNeedKeyEvent(contentType, initData, initDataLength);
+        event->setTarget(&element);
+        element.scheduleEvent(event.release());
+    }
+}
+
+void HTMLMediaElementEncryptedMedia::playerDestroyed(HTMLMediaElement& element)
+{
+    HTMLMediaElementEncryptedMedia& thisElement = HTMLMediaElementEncryptedMedia::from(element);
+    thisElement.setMediaKeysInternal(element, 0);
+}
+
+blink::WebContentDecryptionModule* HTMLMediaElementEncryptedMedia::contentDecryptionModule(HTMLMediaElement& element)
+{
+    HTMLMediaElementEncryptedMedia& thisElement = HTMLMediaElementEncryptedMedia::from(element);
+    return thisElement.contentDecryptionModule();
+}
+
+} // namespace WebCore