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Diffstat (limited to 'src/modules/bluetooth/bt-codec-api.h')
-rw-r--r-- | src/modules/bluetooth/bt-codec-api.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/modules/bluetooth/bt-codec-api.h b/src/modules/bluetooth/bt-codec-api.h new file mode 100644 index 000000000..900ffe942 --- /dev/null +++ b/src/modules/bluetooth/bt-codec-api.h @@ -0,0 +1,67 @@ +#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; |