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backend-native: implement volume control

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Parse the gain changed AT commands from the headset and fire 2 new
hooks as a result. The device will connect to those hooks and change the
source/sink volumes.

When the source/sink volume changes, set the gain on the microphone or
speaker respectively. Make sure we do nothing if the transport can not
handle the gain changes.
This commit is contained in:
Wim Taymans 2014-10-24 09:56:52 +02:00 • committed by Arun Raghavan
parent 7d4a497b3d
commit 34a5c754a9
3 changed files with 203 additions and 1 deletions
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55
src/modules/bluetooth/backend-native.c
View file

@ -114,6 +114,7 @@ static int bluez5_sco_acquire_cb(pa_bluetooth_transport *t, bool optional, size_
src_addr = d->adapter->address;
dst_addr = d->address;
/* don't use ba2str to avoid -lbluetooth */
for (i = 5; i >= 0; i--, src_addr += 3)
src.b[i] = strtol(src_addr, NULL, 16);
for (i = 5; i >= 0; i--, dst_addr += 3)
@ -230,13 +231,25 @@ static void rfcomm_io_callback(pa_mainloop_api *io, pa_io_event *e, int fd, pa_i
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", 5);
len = write(fd, "\r\nOK\r\n", 5);
/* 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)
@ -262,6 +275,44 @@ static void transport_destroy(pa_bluetooth_transport *t) {
pa_xfree(trfc);
}
static void set_speaker_gain(pa_bluetooth_transport *t, uint16_t gain) {
struct transport_rfcomm *trfc = t->userdata;
char buf[512];
ssize_t len, written;
if (t->speaker_gain == gain)
return;
t->speaker_gain = gain;
len = sprintf(buf, "+VGS=%d\r\n", gain);
pa_log_debug("RFCOMM >> +VGS=%d", gain);
written = write(trfc->rfcomm_fd, buf, len);
if (written != len)
pa_log_error("RFCOMM write error: %s", pa_cstrerror(errno));
}
static void set_microphone_gain(pa_bluetooth_transport *t, uint16_t gain) {
struct transport_rfcomm *trfc = t->userdata;
char buf[512];
ssize_t len, written;
if (t->microphone_gain == gain)
return;
t->microphone_gain = gain;
len = sprintf(buf, "+VGM=%d\r\n", gain);
pa_log_debug("RFCOMM >> +VGM=%d", gain);
written = write (trfc->rfcomm_fd, buf, len);
if (written != len)
pa_log_error("RFCOMM write error: %s", pa_cstrerror(errno));
}
static DBusMessage *profile_new_connection(DBusConnection *conn, DBusMessage *m, void *userdata) {
pa_bluetooth_backend *b = userdata;
pa_bluetooth_device *d;
@ -308,6 +359,8 @@ static DBusMessage *profile_new_connection(DBusConnection *conn, DBusMessage *m,
t->acquire = bluez5_sco_acquire_cb;
t->release = bluez5_sco_release_cb;
t->destroy = transport_destroy;
t->set_speaker_gain = set_speaker_gain;
t->set_microphone_gain = set_microphone_gain;
trfc = pa_xnew0(struct transport_rfcomm, 1);
trfc->rfcomm_fd = fd;