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bluez5: make room for a2dp duplex channel

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Some non-standard A2DP codecs (FastStream/aptX-LL) have "voice duplex
channel" that can be used to provide an A2DP duplex mode.

Add support for duplex channels, accounting for the fact that the two
directions may be encoded with different actual codecs.
This commit is contained in:
Pauli Virtanen 2021-08-15 19:11:12 +03:00
parent 4ab8ecfe06
commit eca37b58a6
3 changed files with 82 additions and 28 deletions
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18
spa/plugins/bluez5/a2dp-source.c
View file

@ -146,6 +146,7 @@ struct impl {
uint64_t skip_count;
bool is_input;
bool is_duplex;
};
#define NAME "a2dp-source"
@ -465,6 +466,8 @@ static void a2dp_on_ready_read(struct spa_source *source)
goto stop;
}
spa_log_trace(this->log, "socket poll");
/* update the current pts */
spa_system_clock_gettime(this->data_system, CLOCK_MONOTONIC, &this->now);
@ -667,7 +670,8 @@ static int do_start(struct impl *this)
spa_return_val_if_fail(this->transport != NULL, -EIO);
if (this->transport->state >= SPA_BT_TRANSPORT_STATE_PENDING)
if (this->transport->state >= SPA_BT_TRANSPORT_STATE_PENDING ||
this->is_duplex)
res = transport_start(this);
this->started = true;
@ -1377,6 +1381,8 @@ impl_init(const struct spa_handle_factory *factory,
sscanf(str, "pointer:%p", &this->transport);
if ((str = spa_dict_lookup(info, "bluez5.a2dp-source-role")) != NULL)
this->is_input = spa_streq(str, "input");
if ((str = spa_dict_lookup(info, "api.bluez5.a2dp-duplex")) != NULL)
this->is_duplex = spa_atob(str);
}
if (this->transport == NULL) {
@ -1388,6 +1394,16 @@ impl_init(const struct spa_handle_factory *factory,
return -EINVAL;
}
this->codec = this->transport->a2dp_codec;
if (this->is_duplex) {
if (!this->codec->duplex_codec) {
spa_log_error(this->log, "transport codec doesn't support duplex");
return -EINVAL;
}
this->codec = this->codec->duplex_codec;
this->is_input = true;
}
if (this->codec->init_props != NULL)
this->codec_props = this->codec->init_props(this->codec,
this->transport->device->settings);