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/* Copyright 2016 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.
*/
#ifndef CRAS_OBSERVER_OPS_H
#define CRAS_OBSERVER_OPS_H
#include "cras_types.h"
/* Observation of CRAS state.
* Unless otherwise specified, all notifications only contain the data value
* reflecting the current state: it is possible that multiple notifications
* are queued within CRAS before being sent to the client.
*/
struct cras_observer_ops {
/* System output volume changed. */
void (*output_volume_changed)(void *context, int32_t volume);
/* System output mute changed. */
void (*output_mute_changed)(void *context, int muted, int user_muted,
int mute_locked);
/* System input/capture gain changed. */
void (*capture_gain_changed)(void *context, int32_t gain);
/* System input/capture mute changed. */
void (*capture_mute_changed)(void *context, int muted, int mute_locked);
/* Device or node topology changed. */
void (*nodes_changed)(void *context);
/* Active node changed. A notification is sent for every change.
* When there is no active node, node_id is 0. */
void (*active_node_changed)(void *context,
enum CRAS_STREAM_DIRECTION dir,
cras_node_id_t node_id);
/* Output node volume changed. */
void (*output_node_volume_changed)(void *context,
cras_node_id_t node_id,
int32_t volume);
/* Node left/right swapped state change. */
void (*node_left_right_swapped_changed)(void *context,
cras_node_id_t node_id,
int swapped);
/* Input gain changed. */
void (*input_node_gain_changed)(void *context, cras_node_id_t node_id,
int32_t gain);
/* Suspend state changed. */
void (*suspend_changed)(void *context, int suspended);
/* Number of active streams changed. */
void (*num_active_streams_changed)(void *context,
enum CRAS_STREAM_DIRECTION dir,
uint32_t num_active_streams);
/* Number of input streams with permission changed. */
void (*num_input_streams_with_permission_changed)(
void *context,
uint32_t num_input_streams[CRAS_NUM_CLIENT_TYPE]);
/* Hotword triggered. */
void (*hotword_triggered)(void *context, int64_t tv_sec,
int64_t tv_nsec);
/* State regarding whether non-empty audio is being played/captured has
* changed. */
void (*non_empty_audio_state_changed)(void *context, int non_empty);
/* Bluetooth headset battery level changed. */
void (*bt_battery_changed)(void *context, const char *address,
uint32_t level);
};
#endif /* CRAS_OBSERVER_OPS_H */
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