Pepper API for output protection.

ppapi/api/private/ppb_output_protection_private.idl

Index: ppapi/api/private/ppb_output_protection_private.idl
diff --git a/ppapi/api/private/ppb_output_protection_private.idl b/ppapi/api/private/ppb_output_protection_private.idl
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+/* Copyright 2013 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 API for output protection. Currently, it only supports
+ * Chrome OS.
+ */
+
+[generate_thunk]
+
+label Chrome {
+  M31 = 0.1
+};
+
+/**
+ * Content protection methods applied on video output link.
+ */
+[assert_size(4)] enum PP_OutputProtectionMethod_Private {
+  PP_OUTPUT_PROTECTION_METHOD_PRIVATE_NONE = 0,
+  PP_OUTPUT_PROTECTION_METHOD_PRIVATE_HDCP = 1 << 0
+};
+
+/**
+ * Video output link types.
+ */
+[assert_size(4)] enum PP_OutputProtectionLinkType_Private {
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_NONE = 0,
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_UNKNOWN = 1 << 0,
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_INTERNAL = 1 << 1,
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_VGA = 1 << 2,
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_HDMI = 1 << 3,
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_DVI = 1 << 4,
+  PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_DISPLAYPORT = 1 << 5
+};
+
+/**
+ * The <code>PPB_OutputProtection_Private</code> interface allows controlling
+ * output protection.
+ *
+ * <strong>Example:</strong>
+ *
+ * @code
+ * op = output_protection->Create(instance);
+ * output_protection->QueryStatus(op, &link_mask, &protection_mask,
+ *                                done_callback);
+ * @endcode
+ *
+ * In this example, the plugin wants to enforce HDCP for HDMI link.
+ * @code
+ * if (link_mask & PP_OUTPUT_PROTECTION_LINK_TYPE_PRIVATE_HDMI) {
+ *   output_protection->EnableProtection(
+ *       op, PP_OUTPUT_PROTECTION_METHOD_PRIVATE_HDCP, done_callback);
+ * }
+ * @endcode
+ *
+ * After EnableProtection() completes, the plugin has to query protection
+ * status periodically to make sure the protection is enabled and remains
+ * enabled.
+ */
+interface PPB_OutputProtection_Private {
+  /**
+   * Create() creates a new <code>PPB_OutputProtection_Private</code> object.
+   *
+   * @pram[in] instance A <code>PP_Instance</code> identifying one instance of
+   * a module.
+   *
+   * @return A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_OutputProtection_Private</code> if successful, 0 if creation
+   * failed.
+   */
+  PP_Resource Create([in] PP_Instance instance);
+
+  /**
+   * IsOutputProtection() determines if the provided resource is a
+   * <code>PPB_OutputProtection_Private</code>.
+   *
+   * @param[in] resource A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_OutputProtection_Private</code>.
+   *
+   * @return <code>PP_TRUE</code> if the resource is a
+   * <code>PPB_OutputProtection_Private</code>, <code>PP_FALSE</code> if the
+   * resource is invalid or some type other than
+   * <code>PPB_OutputProtection_Private</code>.
+   */
+  PP_Bool IsOutputProtection([in] PP_Resource resource);
+
+  /**
+   * Query link status and protection status.
+   * Clients have to query status periodically in order to detect changes.
+   *
+   * @param[in] resource A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_OutputProtection_Private</code>.
+   * @param[out] link_mask The type of connected output links, which is a
+   * bit-mask of the <code>PP_OutputProtectionLinkType_Private</code> values.
+   * @param[out] protection_mask Enabled protection methods, which is a
+   * bit-mask of the <code>PP_OutputProtectionMethod_Private</code> values.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to run on
+   * asynchronous completion of QueryStatus(). This callback will only run if
+   * QueryStatus() returns <code>PP_OK_COMPLETIONPENDING</code>.
+   *
+   * @return An int32_t containing an error code from <code>pp_errors.h</code>.
+   */
+  int32_t QueryStatus(
+      [in] PP_Resource resource,
+      [out] uint32_t link_mask,
+      [out] uint32_t protection_mask,
+      [in] PP_CompletionCallback callback);
+
+  /**
+   * Set desired protection methods.
+   *
+   * When the desired protection method(s) have been applied to all applicable
+   * output links, the relevant bit(s) of the protection_mask returned by
+   * QueryStatus() will be set. Otherwise, the relevant bit(s) of
+   * protection_mask will not be set; there is no separate error code or
+   * callback.
+   *
+   * Protections will be disabled if no longer desired by all instances.
+   *
+   * @param[in] resource A <code>PP_Resource</code> corresponding to a
+   * <code>PPB_OutputProtection_Private</code>.
+   * @param[in] desired_protection_mask The desired protection methods, which
+   * is a bit-mask of the <code>PP_OutputProtectionMethod_Private</code>
+   * values.
+   * @param[in] callback A <code>PP_CompletionCallback</code> to be called when
+   * the protection request has been made. This may be before the protection
+   * have actually been applied. Call QueryStatus to get protection status.
+   *
+   * @return An int32_t containing an error code from <code>pp_errors.h</code>.
+   */
+  int32_t EnableProtection(
+      [in] PP_Resource resource,
+      [in] uint32_t desired_protection_mask,
+      [in] PP_CompletionCallback callback);
+};