godot/scene/audio/audio_player.cpp

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/*************************************************************************/
/* audio_player.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "audio_player.h"
void AudioPlayer::_mix_audio() {
if (!stream_playback.is_valid()) {
return;
}
if (!active) {
return;
}
if (setseek >= 0.0) {
stream_playback->start(setseek);
setseek = -1.0; //reset seek
}
int bus_index = AudioServer::get_singleton()->thread_find_bus_index(bus);
//get data
AudioFrame *buffer = mix_buffer.ptr();
int buffer_size = mix_buffer.size();
//mix
stream_playback->mix(buffer, 1.0, buffer_size);
//multiply volume interpolating to avoid clicks if this changes
float vol = Math::db2linear(mix_volume_db);
float vol_inc = (Math::db2linear(volume_db) - vol) / float(buffer_size);
for (int i = 0; i < buffer_size; i++) {
buffer[i] *= vol;
vol += vol_inc;
}
//set volume for next mix
mix_volume_db = volume_db;
AudioFrame *targets[3] = { NULL, NULL, NULL };
if (AudioServer::get_singleton()->get_speaker_mode() == AudioServer::SPEAKER_MODE_STEREO) {
targets[0] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 0);
} else {
switch (mix_target) {
case MIX_TARGET_STEREO: {
targets[0] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 1);
} break;
case MIX_TARGET_SURROUND: {
targets[0] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 1);
targets[1] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 2);
if (AudioServer::get_singleton()->get_speaker_mode() == AudioServer::SPEAKER_SURROUND_71) {
targets[2] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 3);
}
} break;
case MIX_TARGET_CENTER: {
targets[0] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 0);
} break;
}
}
for (int c = 0; c < 3; c++) {
if (!targets[c])
break;
for (int i = 0; i < buffer_size; i++) {
targets[c][i] += buffer[i];
}
}
}
void AudioPlayer::_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);
}
}
void AudioPlayer::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> AudioPlayer::get_stream() const {
return stream;
}
void AudioPlayer::set_volume_db(float p_volume) {
volume_db = p_volume;
}
float AudioPlayer::get_volume_db() const {
return volume_db;
}
void AudioPlayer::play(float p_from_pos) {
if (stream_playback.is_valid()) {
mix_volume_db = volume_db; //reset volume ramp
setseek = p_from_pos;
active = true;
}
}
void AudioPlayer::seek(float p_seconds) {
if (stream_playback.is_valid()) {
setseek = p_seconds;
}
}
void AudioPlayer::stop() {
if (stream_playback.is_valid()) {
active = false;
}
}
bool AudioPlayer::is_playing() const {
if (stream_playback.is_valid()) {
return active && stream_playback->is_playing();
}
return false;
}
float AudioPlayer::get_pos() {
if (stream_playback.is_valid()) {
return stream_playback->get_pos();
}
return 0;
}
void AudioPlayer::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 AudioPlayer::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 AudioPlayer::set_autoplay(bool p_enable) {
autoplay = p_enable;
}
bool AudioPlayer::is_autoplay_enabled() {
return autoplay;
}
void AudioPlayer::set_mix_target(MixTarget p_target) {
mix_target = p_target;
}
AudioPlayer::MixTarget AudioPlayer::get_mix_target() const {
return mix_target;
}
void AudioPlayer::_set_playing(bool p_enable) {
if (p_enable)
play();
else
stop();
}
bool AudioPlayer::_is_active() const {
return active;
}
void AudioPlayer::_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 AudioPlayer::_bus_layout_changed() {
_change_notify();
}
void AudioPlayer::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_stream", "stream:AudioStream"), &AudioPlayer::set_stream);
ClassDB::bind_method(D_METHOD("get_stream"), &AudioPlayer::get_stream);
ClassDB::bind_method(D_METHOD("set_volume_db", "volume_db"), &AudioPlayer::set_volume_db);
ClassDB::bind_method(D_METHOD("get_volume_db"), &AudioPlayer::get_volume_db);
ClassDB::bind_method(D_METHOD("play", "from_pos"), &AudioPlayer::play, DEFVAL(0.0));
ClassDB::bind_method(D_METHOD("seek", "to_pos"), &AudioPlayer::seek);
ClassDB::bind_method(D_METHOD("stop"), &AudioPlayer::stop);
ClassDB::bind_method(D_METHOD("is_playing"), &AudioPlayer::is_playing);
ClassDB::bind_method(D_METHOD("get_pos"), &AudioPlayer::get_pos);
ClassDB::bind_method(D_METHOD("set_bus", "bus"), &AudioPlayer::set_bus);
ClassDB::bind_method(D_METHOD("get_bus"), &AudioPlayer::get_bus);
ClassDB::bind_method(D_METHOD("set_autoplay", "enable"), &AudioPlayer::set_autoplay);
ClassDB::bind_method(D_METHOD("is_autoplay_enabled"), &AudioPlayer::is_autoplay_enabled);
ClassDB::bind_method(D_METHOD("set_mix_target", "mix_target"), &AudioPlayer::set_mix_target);
ClassDB::bind_method(D_METHOD("get_mix_target"), &AudioPlayer::get_mix_target);
ClassDB::bind_method(D_METHOD("_set_playing", "enable"), &AudioPlayer::_set_playing);
ClassDB::bind_method(D_METHOD("_is_active"), &AudioPlayer::_is_active);
ClassDB::bind_method(D_METHOD("_bus_layout_changed"), &AudioPlayer::_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::INT, "mix_target", PROPERTY_HINT_ENUM, "Stereo,Surround,Center"), "set_mix_target", "get_mix_target");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "bus", PROPERTY_HINT_ENUM, ""), "set_bus", "get_bus");
}
AudioPlayer::AudioPlayer() {
mix_volume_db = 0;
volume_db = 0;
autoplay = false;
setseek = -1;
active = false;
mix_target = MIX_TARGET_STEREO;
AudioServer::get_singleton()->connect("bus_layout_changed", this, "_bus_layout_changed");
}
AudioPlayer::~AudioPlayer() {
}