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/* Copyright (c) 2013 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_HFP_INFO_H_
#define CRAS_HFP_INFO_H_
#include "cras_iodev.h"
#include "cras_types.h"
/* Linked list to hold the information of callbacks to trigger
* when the size of SCO packet has changed.
*/
struct hfp_packet_size_changed_callback {
void *data;
void (*cb)(void *data);
struct hfp_packet_size_changed_callback *next, *prev;
};
/* Structure to handle sample transmission between CRAS and the SCO
* socket acquired from bluez.
*/
struct hfp_info;
/* Creates an hfp_info instance. */
struct hfp_info *hfp_info_create();
/* Destroys given hfp_info instance. */
void hfp_info_destroy(struct hfp_info *info);
/* Checks if given hfp_info is running. */
int hfp_info_running(struct hfp_info *info);
/* Starts the hfp_info to transmit and reveice samples to and from the file
* descriptor of a SCO socket.
*/
int hfp_info_start(int fd, unsigned int mtu, struct hfp_info *info);
/* Stops given hfp_info. This implies sample transmission will
* stop and socket be closed.
*/
int hfp_info_stop(struct hfp_info *info);
/* Queries how many frames of data are queued.
* Args:
* info - The hfp_info holding the buffer to query.
* dev - The iodev to indicate which buffer to query, playback
* or capture, depending on its direction.
*/
int hfp_buf_queued(struct hfp_info *info, const struct cras_iodev *dev);
/* Gets how many bytes of the buffer are used.
* Args:
* info - The hfp_info holding buffer.
* dev - The iodev which uses the buffer.
*/
int hfp_buf_size(struct hfp_info *info, struct cras_iodev *dev);
/* Acquire buffer of count frames for dev to write(or read,
* depend on dev's direction).
* Args:
* info - The hfp_info holding buffer.
* dev - The iodev to acquire buffer for.
* buf - To hold the returned pointer of acquired buffer.
* count - Number of bytes of buffer to acquire, will be filled with the
* actual acquired buffer size in bytes.
*/
void hfp_buf_acquire(struct hfp_info *info, struct cras_iodev *dev,
uint8_t **buf, unsigned *count);
/* Releases the previously acquired buffer.
* Args:
* info - The hfp_info holding the buffer.
* dev - The iodev who releases buffer.
* written_frames - The size of the previously acquired buffer in frames
* which's been used.
*/
void hfp_buf_release(struct hfp_info *info, struct cras_iodev *dev,
unsigned written_frames);
/* Adds cras_iodev to given hfp_info. Only when an output iodev is added,
* hfp_info starts sending samples to the SCO socket. Similarly, only when an
* input iodev is added, it starts to read samples from SCO socket.
*/
int hfp_info_add_iodev(struct hfp_info *info, struct cras_iodev *dev);
/* Removes cras_iodev from hfp_info. hfp_info will stop sending or
* reading samples right after the iodev is removed. This function is used for
* iodev closure.
*/
int hfp_info_rm_iodev(struct hfp_info *info, struct cras_iodev *dev);
/* Checks if there's any iodev added to the given hfp_info. */
int hfp_info_has_iodev(struct hfp_info *info);
/* Registers a callback function for the SCO packet size changed event.
* Args:
* info - The hfp_info to register callback to.
* cb - The callback function to call.
* data - The data which will be passed to callback function.
*/
void hfp_register_packet_size_changed_callback(struct hfp_info *info,
void (*cb)(void *data),
void *data);
/* Unregisters a callback function for the SCO packet size changed event.
* Args:
* info - The hfp_info to unregister callback from.
* data - The data used as key to unregister callback.
*/
void hfp_unregister_packet_size_changed_callback(struct hfp_info *info,
void *data);
#endif /* CRAS_HFP_INFO_H_ */
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