Add PPAPI decryptor interfaces.

ppapi/api/private/ppb_content_decryptor_private.idl

+/* 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.
+ */
+
+/**
+ * This file defines the <code>PPB_ContentDecryptor_Private</code>
+ * interface.
+ */
+label Chrome {
+  M23 = 0.1
+};
+
+/**
+ * <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
+ */
+interface PPB_ContentDecryptor_Private {
+
+  /**
+   * 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 <code>Decrypt()</code> on the
+   * <code>PPP_ContentDecryptor_Private<code> interface. In response, the
+   * browser should provide a key to the decryptor plugin by calling
+   * <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(
+      [in] PP_Instance instance,
+      [in] PP_Var key_system,
+      [in] PP_Var session_id,
+      [in] 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 with the application
+   * providing more data via additional calls to <code>AddKey()</code> could be
+   * required. <code>KeyAdded()</code> is sent once the sequence is completed.
+   *
+   * @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(
+      [in] PP_Instance instance,
+      [in] PP_Var key_system,
+      [in] PP_Var session_id);
+
+  /**
+   * A message or request has been generated by or for key_system, and needs to
+   * be sent to a key server.
+   *
+   * For example, in response to successful key request generation resulting
+   * from a call to the <code>GenerateKeyRequest()</code> method on the
+   * <code>PPP_ContentDecryptor_Private</code> interface, the decryptor will
+   * 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. Of note is 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(
+      [in] PP_Instance instance,
+      [in] PP_Var key_system,
+      [in] PP_Var session_id,
+      [in] PP_Resource message,
+      [in] 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(
+      [in] PP_Instance instance,
+      [in] PP_Var key_system,
+      [in] PP_Var session_id,
+      [in] int32_t media_error,
+      [in] 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.
+   *
+   * @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(
+      [in] PP_Instance instance,
+      [in] PP_Resource decrypted_block,
+      [in] 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.
+   *
+   * @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(
+      [in] PP_Instance instance,
+      [in] PP_Resource decrypted_frame,
+      [in] 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.
+   *
+   * @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(
+      [in] PP_Instance instance,
+      [in] PP_Resource decrypted_samples,
+      [in] int32_t request_id);
+};