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bluetooth: Add 20dB boost for faststream source volume

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Some devices unexpectedly return stereo backchannel stream with wrong frequency,
and volume of backchannel stream appears too low.

If this happens, boost source volume by 20dB.

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/628>
This commit is contained in:
Igor V. Kovalenko 2021-09-10 23:21:09 +03:00
parent 76e01b25f5
commit f2b748e851
3 changed files with 53 additions and 0 deletions
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31
src/modules/bluetooth/module-bluez5-device.c
View file

@ -116,6 +116,8 @@ struct userdata {
pa_hook_slot *sink_volume_changed_slot;
pa_hook_slot *source_volume_changed_slot;
pa_hook_slot *source_output_new_hook_slot;
pa_bluetooth_discovery *discovery;
pa_bluetooth_device *device;
pa_bluetooth_transport *transport;
@ -2755,6 +2757,30 @@ static int device_process_msg(pa_msgobject *obj, int code, void *data, int64_t o
return 0;
}
/* Run from main thread */
static pa_hook_result_t a2dp_source_output_fixate_hook_callback(pa_core *c, pa_source_output_new_data *new_data, struct userdata *u) {
double volume_factor_dB;
pa_cvolume cv;
pa_assert(c);
pa_assert(new_data);
pa_assert(u);
/* When transport is released, there is no decoder and no codec */
if (!u->bt_codec || !u->decoder_info)
return PA_HOOK_OK;
if (!u->bt_codec->get_source_output_volume_factor_dB)
return PA_HOOK_OK;
volume_factor_dB = u->bt_codec->get_source_output_volume_factor_dB(u->decoder_info);
pa_cvolume_set(&cv, u->decoder_sample_spec.channels, pa_sw_volume_from_dB(volume_factor_dB));
pa_source_output_new_data_apply_volume_factor_source(new_data, &cv);
return PA_HOOK_OK;
}
int pa__init(pa_module* m) {
struct userdata *u;
const char *path;
@ -2836,6 +2862,8 @@ int pa__init(pa_module* m) {
u->transport_source_volume_changed_slot =
pa_hook_connect(pa_bluetooth_discovery_hook(u->discovery, PA_BLUETOOTH_HOOK_TRANSPORT_SOURCE_VOLUME_CHANGED), PA_HOOK_NORMAL, (pa_hook_cb_t) transport_source_volume_changed_cb, u);
u->source_output_new_hook_slot = pa_hook_connect(&m->core->hooks[PA_CORE_HOOK_SOURCE_OUTPUT_NEW], PA_HOOK_EARLY, (pa_hook_cb_t) a2dp_source_output_fixate_hook_callback, u);
if (add_card(u) < 0)
goto fail;
@ -2899,6 +2927,9 @@ void pa__done(pa_module *m) {
stop_thread(u);
if (u->source_output_new_hook_slot)
pa_hook_slot_free(u->source_output_new_hook_slot);
if (u->device_connection_changed_slot)
pa_hook_slot_free(u->device_connection_changed_slot);