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