| /* 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_ */ |