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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "content/renderer/media/webcontentdecryptionmodulesession_impl.h"
      6 
      7 #include "base/callback_helpers.h"
      8 #include "base/logging.h"
      9 #include "base/strings/string_util.h"
     10 #include "third_party/WebKit/public/platform/WebURL.h"
     11 
     12 namespace content {
     13 
     14 WebContentDecryptionModuleSessionImpl::WebContentDecryptionModuleSessionImpl(
     15     uint32 session_id,
     16     media::MediaKeys* media_keys,
     17     Client* client,
     18     const SessionClosedCB& session_closed_cb)
     19     : media_keys_(media_keys),
     20       client_(client),
     21       session_closed_cb_(session_closed_cb),
     22       session_id_(session_id) {
     23   DCHECK(media_keys_);
     24 }
     25 
     26 WebContentDecryptionModuleSessionImpl::
     27 ~WebContentDecryptionModuleSessionImpl() {
     28 }
     29 
     30 blink::WebString WebContentDecryptionModuleSessionImpl::sessionId() const {
     31   return web_session_id_;
     32 }
     33 
     34 void WebContentDecryptionModuleSessionImpl::generateKeyRequest(
     35     const blink::WebString& mime_type,
     36     const uint8* init_data, size_t init_data_length) {
     37   // TODO(ddorwin): Guard against this in supported types check and remove this.
     38   // Chromium only supports ASCII MIME types.
     39   if (!IsStringASCII(mime_type)) {
     40     NOTREACHED();
     41     OnSessionError(media::MediaKeys::kUnknownError, 0);
     42     return;
     43   }
     44 
     45   media_keys_->CreateSession(
     46       session_id_, UTF16ToASCII(mime_type), init_data, init_data_length);
     47 }
     48 
     49 void WebContentDecryptionModuleSessionImpl::update(const uint8* response,
     50                                                    size_t response_length) {
     51   DCHECK(response);
     52   media_keys_->UpdateSession(session_id_, response, response_length);
     53 }
     54 
     55 void WebContentDecryptionModuleSessionImpl::close() {
     56   media_keys_->ReleaseSession(session_id_);
     57 }
     58 
     59 void WebContentDecryptionModuleSessionImpl::OnSessionCreated(
     60     const std::string& web_session_id) {
     61   // Due to heartbeat messages, OnSessionCreated() can get called multiple
     62   // times.
     63   // TODO(jrummell): Once all CDMs are updated to support reference ids,
     64   // OnSessionCreated() should only be called once, and the second check can be
     65   // removed.
     66   blink::WebString id = blink::WebString::fromUTF8(web_session_id);
     67   DCHECK(web_session_id_.isEmpty() || web_session_id_ == id)
     68       << "Session ID may not be changed once set.";
     69   web_session_id_ = id;
     70 }
     71 
     72 void WebContentDecryptionModuleSessionImpl::OnSessionMessage(
     73     const std::vector<uint8>& message,
     74     const std::string& destination_url) {
     75   client_->keyMessage(message.empty() ? NULL : &message[0],
     76                       message.size(),
     77                       GURL(destination_url));
     78 }
     79 
     80 void WebContentDecryptionModuleSessionImpl::OnSessionReady() {
     81   // TODO(jrummell): Blink APIs need to be updated to the new EME API. For now,
     82   // convert the response to the old v0.1b API.
     83   client_->keyAdded();
     84 }
     85 
     86 void WebContentDecryptionModuleSessionImpl::OnSessionClosed() {
     87   if (!session_closed_cb_.is_null())
     88     base::ResetAndReturn(&session_closed_cb_).Run(session_id_);
     89 }
     90 
     91 void WebContentDecryptionModuleSessionImpl::OnSessionError(
     92     media::MediaKeys::KeyError error_code,
     93     int system_code) {
     94   client_->keyError(static_cast<Client::MediaKeyErrorCode>(error_code),
     95                     system_code);
     96 }
     97 
     98 }  // namespace content
     99