[pulseaudio-discuss] [PATCH] Absolute volume control for A2DP transport
EHfive
eh5 at sokka.cn
Wed Oct 3 13:12:54 UTC 2018
On 10/3/18 8:37 PM, EHfive wrote:
> Require bluez-tools/mpris-proxy running. (No hurt if dosen't)
>
> If you need play/pause/next... controls , add configurations below to
> /etc/dbus-1/system.d/
>
> ------------------------ mpris.conf
>
> <!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus
> Configuration 1.0//EN"
> "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
> <busconfig>
> <policy context="default">
> <allow send_interface="org.mpris.MediaPlayer2.Player"/>
> </policy>
> </busconfig>
>
> ------------------------
>
An alternative
https://gist.github.com/EHfive/e2a28d0279a6247fab4bac93d73b8571
A python script which implement org.mpris.MediaPlayer2.Player and
register mpris player object by calling org.bluez.Media1.RegisterPlayer.
> ===================
>
> diff --git a/src/modules/bluetooth/bluez5-util.c
> b/src/modules/bluetooth/bluez5-util.c
> index 2d83373..72cd05a 100644
> --- a/src/modules/bluetooth/bluez5-util.c
> +++ b/src/modules/bluetooth/bluez5-util.c
> @@ -348,6 +348,50 @@ void
> pa_bluetooth_transport_free(pa_bluetooth_transport *t) {
> pa_xfree(t);
> }
>
> +static int bluez5_transport_set_property(pa_bluetooth_transport *t,
> const char *prop_name, int prop_type, void *prop_value){
> + DBusMessage *m, *r;
> + DBusError err;
> + DBusMessageIter i;
> + const char * interface = BLUEZ_MEDIA_TRANSPORT_INTERFACE;
> +
> + pa_log_debug("Setting property, Owner: %s; Path: %s; Property:
> %s",t->owner, t->path, prop_name);
> +
> + pa_assert(t);
> + pa_assert(t->device);
> + pa_assert(t->device->discovery);
> +
> + dbus_error_init(&err);
> +
> + pa_assert_se(m = dbus_message_new_method_call(t->owner, t->path,
> "org.freedesktop.DBus.Properties", "Set"));
> +
> + dbus_message_iter_init_append(m, &i);
> +
> + pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_STRING,
> &interface));
> + pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_STRING,
> &prop_name));
> + pa_dbus_append_basic_variant(&i, prop_type, prop_value);
> +
> + r =
> dbus_connection_send_with_reply_and_block(pa_dbus_connection_get(t->device->discovery->connection),
> m, -1, &err);
> + dbus_message_unref(m);
> + m = NULL;
> + if(r) {
> + dbus_message_unref(r);
> + r = NULL;
> + }
> +
> + if(dbus_error_is_set(&err)) {
> + pa_log_debug("Failed to set property \"%s.%s\"", interface,
> prop_name);
> + return -1;
> + }
> +
> + return 0;
> +}
> +
> +static int bluez5_transport_set_volume(pa_bluetooth_transport *t,
> uint16_t volume){
> + if(t->a2dp_gain == volume)
> + return 0;
> + return bluez5_transport_set_property(t, "Volume",
> DBUS_TYPE_UINT16, &volume);
> +}
> +
> static int bluez5_transport_acquire_cb(pa_bluetooth_transport *t,
> bool optional, size_t *imtu, size_t *omtu) {
> DBusMessage *m, *r;
> DBusError err;
> @@ -441,6 +485,14 @@ bool
> pa_bluetooth_device_any_transport_connected(const pa_bluetooth_device
> *d) {
> return false;
> }
>
> +void pa_transport_set_a2dp_gain(pa_bluetooth_transport *t, uint16_t
> a2dp_gain){
> + if(t->a2dp_gain == a2dp_gain)
> + return;
> + t->a2dp_gain = a2dp_gain;
> + pa_hook_fire(pa_bluetooth_discovery_hook(t->device->discovery,
> PA_BLUETOOTH_HOOK_TRANSPORT_A2DP_GAIN_CHANGED), t);
> +}
> +
> +
> static int transport_state_from_string(const char* value,
> pa_bluetooth_transport_state_t *state) {
> pa_assert(value);
> pa_assert(state);
> @@ -483,6 +535,18 @@ static void
> parse_transport_property(pa_bluetooth_transport *t, DBusMessageIter
> pa_bluetooth_transport_set_state(t, state);
> }
>
> + break;
> + }
> + case DBUS_TYPE_UINT16: {
> +
> + uint16_t value;
> + dbus_message_iter_get_basic(&variant_i, &value);
> +
> + if (pa_streq(key, "Volume")) {
> + pa_log_debug("Transport Volume Changed to %u ", value);
> + pa_transport_set_a2dp_gain(t, value);
> + }
> +
> break;
> }
> }
> @@ -1468,6 +1532,7 @@ static DBusMessage
> *endpoint_set_configuration(DBusConnection *conn, DBusMessage
> t = pa_bluetooth_transport_new(d, sender, path, p, config, size);
> t->acquire = bluez5_transport_acquire_cb;
> t->release = bluez5_transport_release_cb;
> + t->set_volume = bluez5_transport_set_volume;
> pa_bluetooth_transport_put(t);
>
> pa_log_debug("Transport %s available for profile %s", t->path,
> pa_bluetooth_profile_to_string(t->profile));
> diff --git a/src/modules/bluetooth/bluez5-util.h
> b/src/modules/bluetooth/bluez5-util.h
> index ad30708..5b8149d 100644
> --- a/src/modules/bluetooth/bluez5-util.h
> +++ b/src/modules/bluetooth/bluez5-util.h
> @@ -47,6 +47,7 @@ typedef enum pa_bluetooth_hook {
> PA_BLUETOOTH_HOOK_TRANSPORT_STATE_CHANGED, /* Call
> data: pa_bluetooth_transport */
> PA_BLUETOOTH_HOOK_TRANSPORT_MICROPHONE_GAIN_CHANGED, /* Call
> data: pa_bluetooth_transport */
> PA_BLUETOOTH_HOOK_TRANSPORT_SPEAKER_GAIN_CHANGED, /* Call
> data: pa_bluetooth_transport */
> + PA_BLUETOOTH_HOOK_TRANSPORT_A2DP_GAIN_CHANGED, /* Call
> data: pa_bluetooth_transport */
> PA_BLUETOOTH_HOOK_MAX
> } pa_bluetooth_hook_t;
>
> @@ -70,6 +71,7 @@ typedef void
> (*pa_bluetooth_transport_release_cb)(pa_bluetooth_transport *t);
> typedef void
> (*pa_bluetooth_transport_destroy_cb)(pa_bluetooth_transport *t);
> typedef void
> (*pa_bluetooth_transport_set_speaker_gain_cb)(pa_bluetooth_transport
> *t, uint16_t gain);
> typedef void
> (*pa_bluetooth_transport_set_microphone_gain_cb)(pa_bluetooth_transport
> *t, uint16_t gain);
> +typedef int
> (*pa_bluetooth_transport_set_volume_cb)(pa_bluetooth_transport *t,
> uint16_t volume);
>
> struct pa_bluetooth_transport {
> pa_bluetooth_device *device;
> @@ -84,6 +86,7 @@ struct pa_bluetooth_transport {
>
> uint16_t microphone_gain;
> uint16_t speaker_gain;
> + uint16_t a2dp_gain;
>
> pa_bluetooth_transport_state_t state;
>
> @@ -92,6 +95,7 @@ struct pa_bluetooth_transport {
> pa_bluetooth_transport_destroy_cb destroy;
> pa_bluetooth_transport_set_speaker_gain_cb set_speaker_gain;
> pa_bluetooth_transport_set_microphone_gain_cb set_microphone_gain;
> + pa_bluetooth_transport_set_volume_cb set_volume;
> void *userdata;
> };
>
> diff --git a/src/modules/bluetooth/module-bluez5-device.c
> b/src/modules/bluetooth/module-bluez5-device.c
> index 351ad12..49a6dba 100644
> --- a/src/modules/bluetooth/module-bluez5-device.c
> +++ b/src/modules/bluetooth/module-bluez5-device.c
> @@ -64,6 +64,7 @@ PA_MODULE_USAGE("path=<device object path>"
> #define BITPOOL_DEC_LIMIT 32
> #define BITPOOL_DEC_STEP 5
> #define HSP_MAX_GAIN 15
> +#define BLUEZ_MAX_GAIN 127
>
> static const char* const valid_modargs[] = {
> "path",
> @@ -113,6 +114,7 @@ struct userdata {
> pa_hook_slot *transport_state_changed_slot;
> pa_hook_slot *transport_speaker_gain_changed_slot;
> pa_hook_slot *transport_microphone_gain_changed_slot;
> + pa_hook_slot *transport_a2dp_gain_changed_slot;
>
> pa_bluetooth_discovery *discovery;
> pa_bluetooth_device *device;
> @@ -1056,6 +1058,37 @@ static void source_set_volume_cb(pa_source *s) {
> u->transport->set_microphone_gain(u->transport, gain);
> }
>
> +static void source_set_a2dp_volume_cb(pa_source *s) {
> + uint16_t gain;
> + pa_volume_t volume;
> + struct userdata *u;
> +
> + pa_assert(s);
> + pa_assert(s->core);
> +
> + u = s->userdata;
> +
> + pa_assert(u);
> + pa_assert(u->source == s);
> +
> + if (u->transport->set_volume == NULL)
> + return;
> +
> + gain = (uint16_t) ((pa_cvolume_max(&s->real_volume) *
> BLUEZ_MAX_GAIN) / PA_VOLUME_NORM);
> +
> + pa_log_debug("Real Volume Gain:%u", gain);
> +
> + if (gain > BLUEZ_MAX_GAIN)
> + gain = BLUEZ_MAX_GAIN;
> +
> + volume = (pa_volume_t) (gain * PA_VOLUME_NORM / BLUEZ_MAX_GAIN);
> +
> + pa_cvolume_set(&s->real_volume, u->sample_spec.channels, volume);
> + pa_cvolume_set(&s->soft_volume, u->sample_spec.channels, volume);
> +
> + u->transport->set_volume(u->transport, gain);
> +}
> +
> /* Run from main thread */
> static int add_source(struct userdata *u) {
> pa_source_new_data data;
> @@ -1109,6 +1142,9 @@ static int add_source(struct userdata *u) {
> if (u->profile == PA_BLUETOOTH_PROFILE_HEADSET_HEAD_UNIT ||
> u->profile == PA_BLUETOOTH_PROFILE_HEADSET_AUDIO_GATEWAY) {
> pa_source_set_set_volume_callback(u->source,
> source_set_volume_cb);
> u->source->n_volume_steps = 16;
> + } else if (u->profile == PA_BLUETOOTH_PROFILE_A2DP_SOURCE) {
> + pa_source_set_set_volume_callback(u->source,
> source_set_a2dp_volume_cb);
> + u->source->n_volume_steps = 1;
> }
> return 0;
> }
> @@ -1230,6 +1266,40 @@ static void sink_set_volume_cb(pa_sink *s) {
> u->transport->set_speaker_gain(u->transport, gain);
> }
>
> +static void sink_set_a2dp_volume_cb(pa_sink *s) {
> + uint16_t gain;
> + pa_volume_t volume;
> + struct userdata *u;
> +
> + pa_assert(s);
> + pa_assert(s->core);
> +
> + u = s->userdata;
> +
> + pa_assert(u);
> + pa_assert(u->sink == s);
> +
> + if (u->transport->set_volume == NULL)
> + return;
> +
> + gain = (uint16_t) ((pa_cvolume_max(&s->real_volume) *
> BLUEZ_MAX_GAIN) / PA_VOLUME_NORM);
> +
> + pa_log_debug("Real Volume Gain:%u", gain);
> +
> + if (gain > BLUEZ_MAX_GAIN)
> + gain = BLUEZ_MAX_GAIN;
> +
> + volume = (pa_volume_t) (gain * PA_VOLUME_NORM / BLUEZ_MAX_GAIN);
> +
> + pa_cvolume_set(&s->real_volume, u->sample_spec.channels, volume);
> +
> + if(u->transport->set_volume(u->transport, gain) < 0) {
> + pa_cvolume_set(&s->soft_volume, u->sample_spec.channels,
> PA_VOLUME_NORM);
> + pa_sink_set_set_volume_callback(s, NULL);
> + u->transport->a2dp_gain = 0xFFu;
> + }
> +}
> +
> /* Run from main thread */
> static int add_sink(struct userdata *u) {
> pa_sink_new_data data;
> @@ -1284,6 +1354,9 @@ static int add_sink(struct userdata *u) {
> if (u->profile == PA_BLUETOOTH_PROFILE_HEADSET_HEAD_UNIT ||
> u->profile == PA_BLUETOOTH_PROFILE_HEADSET_AUDIO_GATEWAY) {
> pa_sink_set_set_volume_callback(u->sink, sink_set_volume_cb);
> u->sink->n_volume_steps = 16;
> + } else if (u->profile == PA_BLUETOOTH_PROFILE_A2DP_SINK) {
> + pa_sink_set_set_volume_callback(u->sink,
> sink_set_a2dp_volume_cb);
> + u->sink->n_volume_steps = 1;
> }
> return 0;
> }
> @@ -2340,6 +2413,53 @@ static pa_hook_result_t
> transport_microphone_gain_changed_cb(pa_bluetooth_discov
> return PA_HOOK_OK;
> }
>
> +static pa_hook_result_t
> transport_a2dp_gain_changed_cb(pa_bluetooth_discovery *y,
> pa_bluetooth_transport *t, struct userdata *u) {
> + pa_volume_t volume;
> + pa_cvolume v;
> + uint16_t gain;
> +
> + pa_assert(t);
> + pa_assert(u);
> +
> + if (t != u->transport)
> + return PA_HOOK_OK;
> +
> + gain = t->a2dp_gain;
> + volume = (pa_volume_t) (gain * PA_VOLUME_NORM / BLUEZ_MAX_GAIN);
> +
> + pa_cvolume_set(&v, u->sample_spec.channels, volume);
> +
> + if(u->profile == PA_BLUETOOTH_PROFILE_A2DP_SINK){
> + pa_assert(u->sink);
> +
> + if(!u->sink->set_volume){
> + pa_cvolume_set(&u->sink->soft_volume,
> u->sample_spec.channels, PA_VOLUME_NORM);
> + pa_sink_set_set_volume_callback(u->sink,
> sink_set_a2dp_volume_cb);
> + }
> +
> +
> + if (gain == 0)
> + pa_sink_mute_changed(u->sink, true);
> + else if(u->sink->muted)
> + pa_sink_mute_changed(u->sink, false);
> +
> + pa_sink_volume_changed(u->sink, &v);
> + } else if(u->profile == PA_BLUETOOTH_PROFILE_A2DP_SOURCE){
> + pa_assert(u->source);
> +
> +
> + if (gain == 0)
> + pa_source_mute_changed(u->source, true);
> + else if(u->source->muted)
> + pa_source_mute_changed(u->source, false);
> +
> + pa_source_volume_changed(u->source, &v);
> + }
> +
> +
> + return PA_HOOK_OK;
> +}
> +
> /* Run from main thread context */
> static int device_process_msg(pa_msgobject *obj, int code, void
> *data, int64_t offset, pa_memchunk *chunk) {
> struct bluetooth_msg *m = BLUETOOTH_MSG(obj);
> @@ -2430,6 +2550,9 @@ int pa__init(pa_module* m) {
> u->transport_microphone_gain_changed_slot =
> pa_hook_connect(pa_bluetooth_discovery_hook(u->discovery,
> PA_BLUETOOTH_HOOK_TRANSPORT_MICROPHONE_GAIN_CHANGED), PA_HOOK_NORMAL,
> (pa_hook_cb_t) transport_microphone_gain_changed_cb, u);
>
> + u->transport_a2dp_gain_changed_slot =
> + pa_hook_connect(pa_bluetooth_discovery_hook(u->discovery,
> PA_BLUETOOTH_HOOK_TRANSPORT_A2DP_GAIN_CHANGED), PA_HOOK_NORMAL,
> (pa_hook_cb_t) transport_a2dp_gain_changed_cb, u);
> +
> if (add_card(u) < 0)
> goto fail;
>
> @@ -2491,6 +2614,9 @@ void pa__done(pa_module *m) {
> if (u->transport_microphone_gain_changed_slot)
> pa_hook_slot_free(u->transport_microphone_gain_changed_slot);
>
> + if (u->transport_a2dp_gain_changed_slot)
> + pa_hook_slot_free(u->transport_a2dp_gain_changed_slot);
> +
> if (u->sbc_info.buffer)
> pa_xfree(u->sbc_info.buffer);
>
>
> _______________________________________________
> pulseaudio-discuss mailing list
> pulseaudio-discuss at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/pulseaudio-discuss
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