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/* Spa A2DP codec API
*
* Copyright © 2020 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef SPA_BLUEZ5_A2DP_CODECS_H_
#define SPA_BLUEZ5_A2DP_CODECS_H_
#include <stdint.h>
#include <stddef.h>
#include <spa/param/audio/format.h>
#include <spa/param/bluetooth/audio.h>
#include <spa/utils/names.h>
#include <spa/support/plugin.h>
#include <spa/pod/pod.h>
#include <spa/pod/builder.h>
#include <spa/support/log.h>
#include "a2dp-codec-caps.h"
#include "bap-codec-caps.h"
/*
* The codec plugin SPA interface is private. The version should be incremented
* when any of the structs or semantics change.
*/
#define SPA_TYPE_INTERFACE_Bluez5CodecMedia SPA_TYPE_INFO_INTERFACE_BASE "Bluez5:Codec:Media:Private"
#define SPA_VERSION_BLUEZ5_CODEC_MEDIA 7
struct spa_bluez5_codec_a2dp {
struct spa_interface iface;
const struct media_codec * const *codecs; /**< NULL terminated array */
};
#define MEDIA_CODEC_FACTORY_NAME(basename) (SPA_NAME_API_CODEC_BLUEZ5_MEDIA "." basename)
#ifdef CODEC_PLUGIN
#define MEDIA_CODEC_EXPORT_DEF(basename,...) \
const char *codec_plugin_factory_name = MEDIA_CODEC_FACTORY_NAME(basename); \
static const struct media_codec * const codec_plugin_media_codec_list[] = { __VA_ARGS__, NULL }; \
const struct media_codec * const * const codec_plugin_media_codecs = codec_plugin_media_codec_list;
extern const struct media_codec * const * const codec_plugin_media_codecs;
extern const char *codec_plugin_factory_name;
#endif
#define MEDIA_CODEC_FLAG_SINK (1 << 0)
#define A2DP_CODEC_DEFAULT_RATE 48000
#define A2DP_CODEC_DEFAULT_CHANNELS 2
enum {
NEED_FLUSH_NO = 0,
NEED_FLUSH_ALL = 1,
NEED_FLUSH_FRAGMENT = 2,
};
struct media_codec_audio_info {
uint32_t rate;
uint32_t channels;
};
struct media_codec {
enum spa_bluetooth_audio_codec id;
uint8_t codec_id;
a2dp_vendor_codec_t vendor;
bool bap;
const char *name;
const char *description;
const char *endpoint_name; /**< Endpoint name. If NULL, same as name */
const struct spa_dict *info;
const size_t send_buf_size;
const struct media_codec *duplex_codec; /**< Codec for non-standard A2DP duplex channel */
struct spa_log *log;
/** If fill_caps is NULL, no endpoint is registered (for sharing with another codec). */
int (*fill_caps) (const struct media_codec *codec, uint32_t flags,
uint8_t caps[A2DP_MAX_CAPS_SIZE]);
int (*select_config) (const struct media_codec *codec, uint32_t flags,
const void *caps, size_t caps_size,
const struct media_codec_audio_info *info,
const struct spa_dict *global_settings, uint8_t config[A2DP_MAX_CAPS_SIZE]);
int (*enum_config) (const struct media_codec *codec, uint32_t flags,
const void *caps, size_t caps_size, uint32_t id, uint32_t idx,
struct spa_pod_builder *builder, struct spa_pod **param);
int (*validate_config) (const struct media_codec *codec, uint32_t flags,
const void *caps, size_t caps_size,
struct spa_audio_info *info);
int (*get_qos)(const struct media_codec *codec,
const void *config, size_t config_size,
const struct bap_endpoint_qos *endpoint_qos,
struct bap_codec_qos *qos);
/** qsort comparison sorting caps in order of preference for the codec.
* Used in codec switching to select best remote endpoints.
* The caps handed in correspond to this codec_id, but are
* otherwise not checked beforehand.
*/
int (*caps_preference_cmp) (const struct media_codec *codec, uint32_t flags, const void *caps1, size_t caps1_size,
const void *caps2, size_t caps2_size, const struct media_codec_audio_info *info,
const struct spa_dict *global_settings);
void *(*init_props) (const struct media_codec *codec, uint32_t flags, const struct spa_dict *settings);
void (*clear_props) (void *);
int (*enum_props) (void *props, const struct spa_dict *settings, uint32_t id, uint32_t idx,
struct spa_pod_builder *builder, struct spa_pod **param);
int (*set_props) (void *props, const struct spa_pod *param);
void *(*init) (const struct media_codec *codec, uint32_t flags, void *config, size_t config_size,
const struct spa_audio_info *info, void *props, size_t mtu);
void (*deinit) (void *data);
int (*update_props) (void *data, void *props);
int (*get_block_size) (void *data);
int (*abr_process) (void *data, size_t unsent);
int (*start_encode) (void *data,
void *dst, size_t dst_size, uint16_t seqnum, uint32_t timestamp);
int (*encode) (void *data,
const void *src, size_t src_size,
void *dst, size_t dst_size,
size_t *dst_out, int *need_flush);
int (*start_decode) (void *data,
const void *src, size_t src_size, uint16_t *seqnum, uint32_t *timestamp);
int (*decode) (void *data,
const void *src, size_t src_size,
void *dst, size_t dst_size,
size_t *dst_out);
int (*reduce_bitpool) (void *data);
int (*increase_bitpool) (void *data);
void (*set_log) (struct spa_log *global_log);
};
struct media_codec_config {
uint32_t config;
int value;
unsigned int priority;
};
int media_codec_select_config(const struct media_codec_config configs[], size_t n,
uint32_t cap, int preferred_value);
bool media_codec_check_caps(const struct media_codec *codec, unsigned int codec_id,
const void *caps, size_t caps_size, const struct media_codec_audio_info *info,
const struct spa_dict *global_settings);
#endif
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