mirror of
https://gitlab.freedesktop.org/pipewire/pipewire.git
synced 2025-11-03 09:01:54 -05:00
1da23145df
Using a probe connection to determine adapter msbc capability causes problems on some adapters (ff8c3d2,84bc0490a5,717004334b, pipewire#2030) and seems to be a bad idea. Go back to probing for transparent msbc transport capability via HCI commands. bluetooth/hci.h may be deprecated later, but for now it's better to go back to using it. (In practice, adapters not supporting esco appear to be fairly rare; kernel commit in 2013 refers to "older devices", so if we can't use HCI, assume the adapter supports the necessary modes.)
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/* Spa HSP/HFP native backend HCI support
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*
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* Copyright © 2022 Pauli Virtanen
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <poll.h>
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#include <sys/uio.h>
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#include <sys/socket.h>
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#include "defs.h"
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#ifndef HAVE_BLUEZ_5_HCI
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int spa_bt_adapter_has_msbc(struct spa_bt_adapter *adapter)
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{
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if (adapter->msbc_probed)
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return adapter->has_msbc;
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return -EOPNOTSUPP;
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}
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#else
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#include <bluetooth/bluetooth.h>
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#include <bluetooth/hci.h>
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#include <bluetooth/hci_lib.h>
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int spa_bt_adapter_has_msbc(struct spa_bt_adapter *adapter)
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{
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int hci_id, res;
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int sock = -1;
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uint8_t features[8], max_page = 0;
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struct sockaddr_hci a;
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const char *str;
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if (adapter->msbc_probed)
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return adapter->has_msbc;
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str = strrchr(adapter->path, '/'); /* hciXX */
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if (str == NULL || sscanf(str, "/hci%d", &hci_id) != 1 || hci_id < 0)
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return -ENOENT;
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sock = socket(AF_BLUETOOTH, SOCK_RAW | SOCK_CLOEXEC, BTPROTO_HCI);
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if (sock < 0)
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goto error;
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memset(&a, 0, sizeof(a));
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a.hci_family = AF_BLUETOOTH;
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a.hci_dev = hci_id;
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if (bind(sock, (struct sockaddr *) &a, sizeof(a)) < 0)
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goto error;
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if (hci_read_local_ext_features(sock, 0, &max_page, features, 1000) < 0)
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goto error;
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close(sock);
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adapter->msbc_probed = true;
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adapter->has_msbc = ((features[2] & LMP_TRSP_SCO) && (features[3] & LMP_ESCO)) ? 1 : 0;
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return adapter->has_msbc;
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error:
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res = -errno;
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if (sock >= 0)
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close(sock);
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return res;
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}
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#endif
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