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#pragma once
/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#include <pulsecore/core.h>
typedef struct pa_bt_codec {
/* Unique name of the codec, lowercase and without whitespaces, used for
* constructing identifier, D-Bus paths, ... */
const char *name;
/* Human readable codec description */
const char *description;
/* Initialize codec, returns codec info data and set sample_spec,
* for_encoding is true when codec_info is used for encoding,
* for_backchannel is true when codec_info is used for backchannel */
void *(*init)(bool for_encoding, bool for_backchannel, const uint8_t *config_buffer, uint8_t config_size, pa_sample_spec *sample_spec, pa_core *core);
/* Deinitialize and release codec info data in codec_info */
void (*deinit)(void *codec_info);
/* Reset internal state of codec info data in codec_info, returns
* a negative value on failure */
int (*reset)(void *codec_info);
/* Get read block size for codec, it is minimal size of buffer
* needed to decode read_link_mtu bytes of encoded data */
size_t (*get_read_block_size)(void *codec_info, size_t read_link_mtu);
/* Get write block size for codec, it is maximal size of buffer
* which can produce at most write_link_mtu bytes of encoded data */
size_t (*get_write_block_size)(void *codec_info, size_t write_link_mtu);
/* Get encoded block size for codec to hold one encoded frame.
* Note HFP mSBC codec encoded block may not fit into one MTU and is sent out in chunks. */
size_t (*get_encoded_block_size)(void *codec_info, size_t input_size);
/* Reduce encoder bitrate for codec, returns new write block size or zero
* if not changed, called when socket is not accepting encoded data fast
* enough */
size_t (*reduce_encoder_bitrate)(void *codec_info, size_t write_link_mtu);
/* Increase encoder bitrate for codec, returns new write block size or zero
* if not changed, called periodically when socket is keeping up with
* encoded data */
size_t (*increase_encoder_bitrate)(void *codec_info, size_t write_link_mtu);
/* Encode input_buffer of input_size to output_buffer of output_size,
* returns size of filled ouput_buffer and set processed to size of
* processed input_buffer */
size_t (*encode_buffer)(void *codec_info, uint32_t timestamp, const uint8_t *input_buffer, size_t input_size, uint8_t *output_buffer, size_t output_size, size_t *processed);
/* Decode input_buffer of input_size to output_buffer of output_size,
* returns size of filled ouput_buffer and set processed to size of
* processed input_buffer */
size_t (*decode_buffer)(void *codec_info, const uint8_t *input_buffer, size_t input_size, uint8_t *output_buffer, size_t output_size, size_t *processed);
} pa_bt_codec;
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