static void rfcomm_io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
pa_bluetooth_transport *t = userdata;
pa_assert(io);
pa_assert(t);
if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
pa_log_info("Lost RFCOMM connection.");
goto fail;
}
if (events & PA_IO_EVENT_INPUT) {
char buf[512];
ssize_t len;
int gain;
len = read(fd, buf, 511);
buf[len] = 0;
pa_log_debug("RFCOMM << %s", buf);
if (sscanf(buf, "AT+VGS=%d", &gain) == 1) {
t->speaker_gain = gain;
pa_hook_fire(pa_bluetooth_discovery_hook(t->device->discovery, PA_BLUETOOTH_HOOK_TRANSPORT_SPEAKER_GAIN_CHANGED), t);
} else if (sscanf(buf, "AT+VGM=%d", &gain) == 1) {
t->microphone_gain = gain;
pa_hook_fire(pa_bluetooth_discovery_hook(t->device->discovery, PA_BLUETOOTH_HOOK_TRANSPORT_MICROPHONE_GAIN_CHANGED), t);
}
pa_log_debug("RFCOMM >> OK");
len = write(fd, "\r\nOK\r\n", 6);
/* we ignore any errors, it's not critical and real errors should
* be caught with the HANGUP and ERROR events handled above */
if (len < 0)
pa_log_error("RFCOMM write error: %s", pa_cstrerror(errno));
}
return;
fail:
pa_bluetooth_transport_unlink(t);
pa_bluetooth_transport_free(t);
return;
}
static void rfcomm_io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_io_event_flags_t events, void *userdata) {
pa_bluetooth_transport *t = userdata;
pa_assert(io);
pa_assert(t);
if (events & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR)) {
pa_log_info("Lost RFCOMM connection.");
goto fail;
}
if (events & PA_IO_EVENT_INPUT) {
char buf[512];
ssize_t len;
int gain, dummy;
bool do_reply = false;
len = pa_read(fd, buf, 511, NULL);
if (len < 0) {
pa_log_error("RFCOMM read error: %s", pa_cstrerror(errno));
goto fail;
}
buf[len] = 0;
pa_log_debug("RFCOMM << %s", buf);
/* There are only four HSP AT commands:
* AT+VGS=value: value between 0 and 15, sent by the HS to AG to set the speaker gain.
* +VGS=value is sent by AG to HS as a response to an AT+VGS command or when the gain
* is changed on the AG side.
* AT+VGM=value: value between 0 and 15, sent by the HS to AG to set the microphone gain.
* +VGM=value is sent by AG to HS as a response to an AT+VGM command or when the gain
* is changed on the AG side.
* AT+CKPD=200: Sent by HS when headset button is pressed.
* RING: Sent by AG to HS to notify of an incoming call. It can safely be ignored because
* it does not expect a reply. */
if (sscanf(buf, "AT+VGS=%d", &gain) == 1 || sscanf(buf, "\r\n+VGM=%d\r\n", &gain) == 1) {
t->speaker_gain = gain;
pa_hook_fire(pa_bluetooth_discovery_hook(t->device->discovery, PA_BLUETOOTH_HOOK_TRANSPORT_SPEAKER_GAIN_CHANGED), t);
do_reply = true;
} else if (sscanf(buf, "AT+VGM=%d", &gain) == 1 || sscanf(buf, "\r\n+VGS=%d\r\n", &gain) == 1) {
t->microphone_gain = gain;
pa_hook_fire(pa_bluetooth_discovery_hook(t->device->discovery, PA_BLUETOOTH_HOOK_TRANSPORT_MICROPHONE_GAIN_CHANGED), t);
do_reply = true;
} else if (sscanf(buf, "AT+CKPD=%d", &dummy) == 1) {
do_reply = true;
} else {
do_reply = false;
}
if (do_reply) {
pa_log_debug("RFCOMM >> OK");
len = write(fd, "\r\nOK\r\n", 6);
/* we ignore any errors, it's not critical and real errors should
* be caught with the HANGUP and ERROR events handled above */
if (len < 0)
pa_log_error("RFCOMM write error: %s", pa_cstrerror(errno));
}
}
return;
fail:
pa_bluetooth_transport_unlink(t);
pa_bluetooth_transport_free(t);
}