1 files changed, 48 insertions, 0 deletions
diff --git a/cras/src/server/config/cras_device_blocklist.h b/cras/src/server/config/cras_device_blocklist.h
new file mode 100644
index 00000000..d0f750bd
--- /dev/null
+++ b/cras/src/server/config/cras_device_blocklist.h
@@ -0,0 +1,48 @@
+/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/*
+ * Keeps a list of playback devices that should be ignored for a card.  This is
+ * useful for devices that present non-functional alsa devices.  For instance
+ * some mics show a phantom playback device.
+ */
+#ifndef CRAS_DEVICE_BLOCKLIST_H_
+#define CRAS_DEVICE_BLOCKLIST_H_
+
+#include <stdint.h>
+
+#include "cras_types.h"
+
+struct cras_device_blocklist;
+
+/* Creates a blocklist of devices that should never be added to the system.
+ * Args:
+ *    config_path - Path containing the config files.
+ * Returns:
+ *    A pointer to the created blocklist on success, NULL on failure.
+ */
+struct cras_device_blocklist *
+cras_device_blocklist_create(const char *config_path);
+
+/* Destroys a blocklist returned by cras_device_blocklist_create().
+ * Args:
+ *    blocklist - Blocklist returned by cras_device_blocklist_create()
+ */
+void cras_device_blocklist_destroy(struct cras_device_blocklist *blocklist);
+
+/* Checks if a playback device on a USB card is blocklisted.
+ * Args:
+ *    blocklist - Blocklist returned by cras_device_blocklist_create()
+ *    vendor_id - USB vendor ID.
+ *    product_id - USB product ID.
+ *    device_index - Index of the alsa device in the card.
+ * Returns:
+ *  1 if the device is blocklisted, 0 otherwise.
+ */
+int cras_device_blocklist_check(struct cras_device_blocklist *blocklist,
+				unsigned vendor_id, unsigned product_id,
+				unsigned desc_checksum, unsigned device_index);
+
+#endif /* CRAS_CARD_DEVICE_BLOCKLIST_H_ */