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godot/scene/2d/audio_stream_player_2d.cpp

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#include "audio_stream_player_2d.h"
#include "scene/2d/area_2d.h"
#include "scene/main/viewport.h"
void AudioStreamPlayer2D::_mix_audio() {
if (!stream_playback.is_valid()) {
return;
}
if (!active) {
return;
}
if (setseek >= 0.0) {
stream_playback->start(setseek);
setseek = -1.0; //reset seek
}
//get data
AudioFrame *buffer = mix_buffer.ptr();
int buffer_size = mix_buffer.size();
//mix
stream_playback->mix(buffer, 1.0, buffer_size);
//write all outputs
for (int i = 0; i < output_count; i++) {
Output current = outputs[i];
//see if current output exists, to keep volume ramp
bool found = false;
for (int j = i; j < prev_output_count; j++) {
if (prev_outputs[j].viewport == current.viewport) {
if (j != i) {
SWAP(prev_outputs[j], prev_outputs[i]);
}
found = true;
break;
}
}
if (!found) {
//create new if was not used before
if (prev_output_count < MAX_OUTPUTS) {
prev_outputs[prev_output_count] = prev_outputs[i]; //may be owned by another viewport
prev_output_count++;
}
prev_outputs[i] = current;
}
//mix!
AudioFrame vol_inc = (current.vol - prev_outputs[i].vol) / float(buffer_size);
AudioFrame vol = current.vol;
switch (AudioServer::get_singleton()->get_speaker_mode()) {
case AudioServer::SPEAKER_MODE_STEREO: {
AudioFrame *target = AudioServer::get_singleton()->thread_get_channel_mix_buffer(current.bus_index, 0);
for (int j = 0; j < buffer_size; j++) {
target[j] += buffer[j] * vol;
vol += vol_inc;
}
} break;
case AudioServer::SPEAKER_SURROUND_51: {
AudioFrame *targets[2] = {
AudioServer::get_singleton()->thread_get_channel_mix_buffer(current.bus_index, 1),
AudioServer::get_singleton()->thread_get_channel_mix_buffer(current.bus_index, 2),
};
for (int j = 0; j < buffer_size; j++) {
AudioFrame frame = buffer[j] * vol;
targets[0][j] += frame;
targets[1][j] += frame;
vol += vol_inc;
}
} break;
case AudioServer::SPEAKER_SURROUND_71: {
AudioFrame *targets[3] = {
AudioServer::get_singleton()->thread_get_channel_mix_buffer(current.bus_index, 1),
AudioServer::get_singleton()->thread_get_channel_mix_buffer(current.bus_index, 2),
AudioServer::get_singleton()->thread_get_channel_mix_buffer(current.bus_index, 3)
};
for (int j = 0; j < buffer_size; j++) {
AudioFrame frame = buffer[j] * vol;
targets[0][j] += frame;
targets[1][j] += frame;
targets[2][j] += frame;
vol += vol_inc;
}
} break;
}
prev_outputs[i] = current;
}
prev_output_count = output_count;
//stream is no longer active, disable this.
if (!stream_playback->is_playing()) {
active = false;
}
output_ready = false;
}
void AudioStreamPlayer2D::_notification(int p_what) {
if (p_what == NOTIFICATION_ENTER_TREE) {
AudioServer::get_singleton()->add_callback(_mix_audios, this);
if (autoplay && !get_tree()->is_editor_hint()) {
play();
}
}
if (p_what == NOTIFICATION_EXIT_TREE) {
AudioServer::get_singleton()->remove_callback(_mix_audios, this);
}
if (p_what == NOTIFICATION_INTERNAL_FIXED_PROCESS) {
//update anything related to position first, if possible of course
if (!output_ready) {
List<Viewport *> viewports;
Ref<World2D> world_2d = get_world_2d();
ERR_FAIL_COND(world_2d.is_null());
int new_output_count = 0;
Vector2 global_pos = get_global_position();
int bus_index = AudioServer::get_singleton()->thread_find_bus_index(bus);
//check if any area is diverting sound into a bus
Physics2DDirectSpaceState *space_state = Physics2DServer::get_singleton()->space_get_direct_state(world_2d->get_space());
Physics2DDirectSpaceState::ShapeResult sr[MAX_INTERSECT_AREAS];
int areas = space_state->intersect_point(global_pos, sr, MAX_INTERSECT_AREAS, Set<RID>(), area_mask, Physics2DDirectSpaceState::TYPE_MASK_AREA);
for (int i = 0; i < areas; i++) {
if (!sr[i].collider)
continue;
Area2D *area2d = sr[i].collider->cast_to<Area2D>();
if (!area2d)
continue;
if (!area2d->is_overriding_audio_bus())
continue;
StringName bus_name = area2d->get_audio_bus();
bus_index = AudioServer::get_singleton()->thread_find_bus_index(bus_name);
break;
}
world_2d->get_viewport_list(&viewports);
for (List<Viewport *>::Element *E = viewports.front(); E; E = E->next()) {
Viewport *vp = E->get();
if (vp->is_audio_listener_2d()) {
//compute matrix to convert to screen
Transform2D to_screen = vp->get_global_canvas_transform() * vp->get_canvas_transform();
Vector2 screen_size = vp->get_visible_rect().size;
//screen in global is used for attenuation
Vector2 screen_in_global = to_screen.affine_inverse().xform(screen_size * 0.5);
float dist = global_pos.distance_to(screen_in_global); //distance to screen center
if (dist > max_distance)
continue; //cant hear this sound in this viewport
float multiplier = Math::pow(1.0f - dist / max_distance, attenuation);
multiplier *= Math::db2linear(volume_db); //also apply player volume!
//point in screen is used for panning
Vector2 point_in_screen = to_screen.xform(global_pos);
float pan = CLAMP(point_in_screen.x / screen_size.width, 0.0, 1.0);
float l = 1.0 - pan;
float r = pan;
outputs[new_output_count].vol = AudioFrame(l, r) * multiplier;
outputs[new_output_count].bus_index = bus_index;
outputs[new_output_count].viewport = vp; //keep pointer only for reference
new_output_count++;
if (new_output_count == MAX_OUTPUTS)
break;
}
}
output_count = new_output_count;
output_ready = true;
}
//start playing if requested
if (setplay >= 0.0) {
setseek = setplay;
active = true;
setplay = -1;
_change_notify("playing"); //update property in editor
}
//stop playing if no longer active
if (!active) {
set_fixed_process_internal(false);
_change_notify("playing"); //update property in editor
}
}
}
void AudioStreamPlayer2D::set_stream(Ref<AudioStream> p_stream) {
ERR_FAIL_COND(!p_stream.is_valid());
AudioServer::get_singleton()->lock();
mix_buffer.resize(AudioServer::get_singleton()->thread_get_mix_buffer_size());
if (stream_playback.is_valid()) {
stream_playback.unref();
stream.unref();
active = false;
setseek = -1;
}
stream = p_stream;
stream_playback = p_stream->instance_playback();
if (stream_playback.is_null()) {
stream.unref();
ERR_FAIL_COND(stream_playback.is_null());
}
AudioServer::get_singleton()->unlock();
}
Ref<AudioStream> AudioStreamPlayer2D::get_stream() const {
return stream;
}
void AudioStreamPlayer2D::set_volume_db(float p_volume) {
volume_db = p_volume;
}
float AudioStreamPlayer2D::get_volume_db() const {
return volume_db;
}
void AudioStreamPlayer2D::play(float p_from_pos) {
if (stream_playback.is_valid()) {
setplay = p_from_pos;
output_ready = false;
set_fixed_process_internal(true);
}
}
void AudioStreamPlayer2D::seek(float p_seconds) {
if (stream_playback.is_valid()) {
setseek = p_seconds;
}
}
void AudioStreamPlayer2D::stop() {
if (stream_playback.is_valid()) {
active = false;
set_fixed_process_internal(false);
setplay = -1;
}
}
bool AudioStreamPlayer2D::is_playing() const {
if (stream_playback.is_valid()) {
return active; // && stream_playback->is_playing();
}
return false;
}
float AudioStreamPlayer2D::get_pos() {
if (stream_playback.is_valid()) {
return stream_playback->get_pos();
}
return 0;
}
void AudioStreamPlayer2D::set_bus(const StringName &p_bus) {
//if audio is active, must lock this
AudioServer::get_singleton()->lock();
bus = p_bus;
AudioServer::get_singleton()->unlock();
}
StringName AudioStreamPlayer2D::get_bus() const {
for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
if (AudioServer::get_singleton()->get_bus_name(i) == bus) {
return bus;
}
}
return "Master";
}
void AudioStreamPlayer2D::set_autoplay(bool p_enable) {
autoplay = p_enable;
}
bool AudioStreamPlayer2D::is_autoplay_enabled() {
return autoplay;
}
void AudioStreamPlayer2D::_set_playing(bool p_enable) {
if (p_enable)
play();
else
stop();
}
bool AudioStreamPlayer2D::_is_active() const {
return active;
}
void AudioStreamPlayer2D::_validate_property(PropertyInfo &property) const {
if (property.name == "bus") {
String options;
for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
if (i > 0)
options += ",";
String name = AudioServer::get_singleton()->get_bus_name(i);
options += name;
}
property.hint_string = options;
}
}
void AudioStreamPlayer2D::_bus_layout_changed() {
_change_notify();
}
void AudioStreamPlayer2D::set_max_distance(float p_pixels) {
ERR_FAIL_COND(p_pixels <= 0.0);
max_distance = p_pixels;
}
float AudioStreamPlayer2D::get_max_distance() const {
return max_distance;
}
void AudioStreamPlayer2D::set_attenuation(float p_curve) {
attenuation = p_curve;
}
float AudioStreamPlayer2D::get_attenuation() const {
return attenuation;
}
void AudioStreamPlayer2D::set_area_mask(uint32_t p_mask) {
area_mask = p_mask;
}
uint32_t AudioStreamPlayer2D::get_area_mask() const {
return area_mask;
}
void AudioStreamPlayer2D::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_stream", "stream:AudioStream"), &AudioStreamPlayer2D::set_stream);
ClassDB::bind_method(D_METHOD("get_stream"), &AudioStreamPlayer2D::get_stream);
ClassDB::bind_method(D_METHOD("set_volume_db", "volume_db"), &AudioStreamPlayer2D::set_volume_db);
ClassDB::bind_method(D_METHOD("get_volume_db"), &AudioStreamPlayer2D::get_volume_db);
ClassDB::bind_method(D_METHOD("play", "from_pos"), &AudioStreamPlayer2D::play, DEFVAL(0.0));
ClassDB::bind_method(D_METHOD("seek", "to_pos"), &AudioStreamPlayer2D::seek);
ClassDB::bind_method(D_METHOD("stop"), &AudioStreamPlayer2D::stop);
ClassDB::bind_method(D_METHOD("is_playing"), &AudioStreamPlayer2D::is_playing);
ClassDB::bind_method(D_METHOD("get_pos"), &AudioStreamPlayer2D::get_pos);
ClassDB::bind_method(D_METHOD("set_bus", "bus"), &AudioStreamPlayer2D::set_bus);
ClassDB::bind_method(D_METHOD("get_bus"), &AudioStreamPlayer2D::get_bus);
ClassDB::bind_method(D_METHOD("set_autoplay", "enable"), &AudioStreamPlayer2D::set_autoplay);
ClassDB::bind_method(D_METHOD("is_autoplay_enabled"), &AudioStreamPlayer2D::is_autoplay_enabled);
ClassDB::bind_method(D_METHOD("_set_playing", "enable"), &AudioStreamPlayer2D::_set_playing);
ClassDB::bind_method(D_METHOD("_is_active"), &AudioStreamPlayer2D::_is_active);
ClassDB::bind_method(D_METHOD("set_max_distance", "pixels"), &AudioStreamPlayer2D::set_max_distance);
ClassDB::bind_method(D_METHOD("get_max_distance"), &AudioStreamPlayer2D::get_max_distance);
ClassDB::bind_method(D_METHOD("set_attenuation", "curve"), &AudioStreamPlayer2D::set_attenuation);
ClassDB::bind_method(D_METHOD("get_attenuation"), &AudioStreamPlayer2D::get_attenuation);
ClassDB::bind_method(D_METHOD("set_area_mask", "mask"), &AudioStreamPlayer2D::set_area_mask);
ClassDB::bind_method(D_METHOD("get_area_mask"), &AudioStreamPlayer2D::get_area_mask);
ClassDB::bind_method(D_METHOD("_bus_layout_changed"), &AudioStreamPlayer2D::_bus_layout_changed);
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "stream", PROPERTY_HINT_RESOURCE_TYPE, "AudioStream"), "set_stream", "get_stream");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "volume_db", PROPERTY_HINT_RANGE, "-80,24"), "set_volume_db", "get_volume_db");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "playing", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_EDITOR), "_set_playing", "_is_active");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "autoplay"), "set_autoplay", "is_autoplay_enabled");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "max_distance", PROPERTY_HINT_RANGE, "1,65536,1"), "set_max_distance", "get_max_distance");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "attenuation", PROPERTY_HINT_EXP_EASING), "set_attenuation", "get_attenuation");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "bus", PROPERTY_HINT_ENUM, ""), "set_bus", "get_bus");
ADD_PROPERTY(PropertyInfo(Variant::INT, "area_mask", PROPERTY_HINT_LAYERS_2D_PHYSICS), "set_area_mask", "get_area_mask");
}
AudioStreamPlayer2D::AudioStreamPlayer2D() {
volume_db = 0;
autoplay = false;
setseek = -1;
active = false;
output_count = 0;
prev_output_count = 0;
max_distance = 2000;
attenuation = 1;
setplay = -1;
output_ready = false;
area_mask = 1;
AudioServer::get_singleton()->connect("bus_layout_changed", this, "_bus_layout_changed");
}
AudioStreamPlayer2D::~AudioStreamPlayer2D() {
}
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