Add PPAPI decryptor interfaces.

ppapi/c/private/ppb_content_decryptor_private.h

+/* Copyright (c) 2012 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.
+ */
+
+/* From private/ppb_content_decryptor_private.idl,
+ *   modified Tue Aug 14 09:36:47 2012.
+ */
+
+#ifndef PPAPI_C_PRIVATE_PPB_CONTENT_DECRYPTOR_PRIVATE_H_
+#define PPAPI_C_PRIVATE_PPB_CONTENT_DECRYPTOR_PRIVATE_H_
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/pp_var.h"
+
+#define PPB_CONTENTDECRYPTOR_PRIVATE_INTERFACE_0_1 \
+    "PPB_ContentDecryptor_Private;0.1"
+#define PPB_CONTENTDECRYPTOR_PRIVATE_INTERFACE \
+    PPB_CONTENTDECRYPTOR_PRIVATE_INTERFACE_0_1
+
+/**
+ * @file
+ * This file defines the <code>PPB_ContentDecryptor_Private</code>
+ * interface. Note: This is a special interface, only to be used for Content
+ * Decryption Modules (CDM), not normal plugins.
+ */
+
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+/**
+ * <code>PPB_ContentDecryptor_Private</code> structure contains the function
+ * pointers the browser must implement to support plugins implementing the
+ * <code>PPP_ContentDecryptor_Private</code> interface. This interface provides
+ * browser side support for the CDM for v0.1 of the proposed Encrypted Media
+ * Extensions: http://goo.gl/rbdnR
+ */
+struct PPB_ContentDecryptor_Private_0_1 {
+  /**
+   * The decryptor requires a key that has not been provided.
+   *
+   * Sent when the decryptor encounters encrypted content, but it does not have
+   * the key required to decrypt the data. The plugin will call this method in
+   * response to a call to the <code>Decrypt()</code> method on the
+   * <code>PPP_ContentDecryptor_Private<code> interface.
+   *
+   * For an internally implemented key system, the browser must provide a key to
+   * the decryptor plugin by calling <code>AddKey()</code> on the
+   * <code>PPP_ContentDecryptor_Private<code> interface.
+   *
+   * For an external key system, the browser must notify the application that
+   * a key is needed by firing a <code>MediaKeyNeededEvent</code> at the
+   * <code>HTMLMediaElement</code>. In response the application must call
+   * <code>addKey()</code> on the <code>HTMLMediaElement</code> which results
+   * in the browser passing the application's key to <code>AddKey()</code> on
+   * the <code>PPP_ContentDecryptor_Private<code> interface.
+   *
+   * @param[in] key_system A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the name of the key system.
+   *
+   * @param[in] session_id A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the session ID.
+   *
+   * @param[in] init_data A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_ARRAYBUFFER</code> containing container-specific
+   * initialization data.
+   */
+  void (*NeedKey)(PP_Instance instance,
+                  struct PP_Var key_system,
+                  struct PP_Var session_id,
+                  struct PP_Var init_data);
+  /**
+   * A key has been added as the result of a call to the <code>AddKey()</code>
+   * method on the <code>PPP_ContentDecryptor_Private</code> interface.
+   *
+   * Note: The above describes the most simple case. Depending on the key
+   * system, a series of <code>KeyMessage()</code> calls from the CDM will be
+   * sent to the browser, and then on to the application by firing a
+   * <code>MediaKeyMessageEvent</code> at the <code>HTMLMediaElement</code>.
+   * In response, the application must then provide more data via additional
+   * calls to the <code>addKey()</code> method on the
+   * <code>HTMLMediaElement</code>, which the browser must pass to the CDM via
+   * calls to <code>AddKey()</code> on the
+   * <code>PPP_ContentDecryptor_Private</code> interface.
+   * The CDM must call <code>KeyAdded()</code> when the sequence is completed,
+   * and, for external key systems, the browser must fire a
+   * <code>MediaKeyCompleteEvent</code> at the <code>HTMlMediaElement</code>.
+   *
+   * @param[in] key_system A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the name of the key system.
+   *
+   * @param[in] session_id A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the session ID.
+   */
+  void (*KeyAdded)(PP_Instance instance,
+                   struct PP_Var key_system,
+                   struct PP_Var session_id);
+  /**
+   * A message or request has been generated for key_system in the CDM, and,
+   * when the key system is external, must be sent to the application.
+   *
+   * For example, when the browser invokes <code>GenerateKeyRequest()</code>
+   * on the<code>PPP_ContentDecryptor_Private</code> interface, the decryptor
+   * must send a key message with the session ID.
+   *
+   * Note that <code>KeyMessage()</code> can be used for purposes other than
+   * responses to <code>GenerateKeyRequest()</code> calls. See also the text
+   * in the comment for <code>KeyAdded()</code>, which describes a sequence of
+   * <code>AddKey()</code> and <code>KeyMessage()</code> calls required to
+   * prepare for decryption.
+   *
+   * @param[in] key_system A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the name of the key system.
+   *
+   * @param[in] session_id A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the session ID.
+   *
+   * @param[in] resource A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_Buffer_Dev</code> resource that contains the message.
+   *
+   * @param[in] default_url A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the default URL for the message.
+   */
+  void (*KeyMessage)(PP_Instance instance,
+                     struct PP_Var key_system,
+                     struct PP_Var session_id,
+                     PP_Resource message,
+                     struct PP_Var default_url);
+  /**
+   * An error occurred in a <code>PPP_ContentDecryptor_Private</code> method,
+   * or within the plugin implementing the interface.
+   *
+   * @param[in] key_system A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the name of the key system.
+   *
+   * @param[in] session_id A <code>PP_Var</code> of type
+   * <code>PP_VARTYPE_STRING</code> containing the session ID.
+   *
+   * @param[in] media_error A MediaKeyError.
+   *
+   * @param[in] system_error A system error code.
+   */
+  void (*KeyError)(PP_Instance instance,
+                   struct PP_Var key_system,
+                   struct PP_Var session_id,
+                   int32_t media_error,
+                   int32_t system_code);
+  /**
+   * Called after the <code>Decrypt()</code> method on the
+   * <code>PPP_ContentDecryptor_Private</code> interface completes to
+   * deliver decrypted_block to the browser for decoding and rendering.
+   *
+   * @param[in] decrypted_block A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_Buffer_Dev</code> resource that contains a decrypted data
+   * block.
+   *
+   * @param[in] request_id A unique value the browser can use to associate
+   * decrypted_block with a decrypt call.
+   */
+  void (*DeliverBlock)(PP_Instance instance,
+                       PP_Resource decrypted_block,
+                       int32_t request_id);
+  /**
+   * Called after the <code>DecryptAndDecode()</code> method on the
+   * <code>PPP_ContentDecryptor_Private</code> interface completes to deliver
+   * a decrypted and decoded video frame to the browser for rendering.
+   *
+   * @param[in] decrypted_frame A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_Buffer_Dev</code> resource that contains a video frame.
+   *
+   * @param[in] request_id A unique value the browser can use to associate
+   * decrypted_frame with a decrypt call.
+   */
+  void (*DeliverFrame)(PP_Instance instance,
+                       PP_Resource decrypted_frame,
+                       int32_t request_id);
+  /**
+   * Called after the <code>DecryptAndDecode()</code> method on the
+   * <code>PPP_ContentDecryptor_Private</code> interface completes to
+   * deliver a buffer of decrypted and decoded audio samples to the browser for
+   * rendering.
+   *
+   * @param[in] decrypted_samples A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_Buffer_Dev</code> resource that contains a decrypted buffer
+   * of decoded audio samples.
+   *
+   * @param[in] request_id A unique value the browser can use to associate
+   * decrypted_samples with a decrypt call.
+   */
+  void (*DeliverSamples)(PP_Instance instance,
+                         PP_Resource decrypted_samples,
+                         int32_t request_id);
+};
+
+typedef struct PPB_ContentDecryptor_Private_0_1 PPB_ContentDecryptor_Private;
+/**
+ * @}
+ */
+
+#endif  /* PPAPI_C_PRIVATE_PPB_CONTENT_DECRYPTOR_PRIVATE_H_ */
+