mirror of
https://github.com/godotengine/godot.git
synced 2025-10-31 05:31:01 +00:00
214 lines
7.4 KiB
C++
214 lines
7.4 KiB
C++
/*************************************************************************/
|
|
/* audio_stream.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://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_stream.h"
|
|
|
|
//////////////////////////////
|
|
|
|
void AudioStreamPlaybackResampled::_begin_resample() {
|
|
|
|
//clear cubic interpolation history
|
|
internal_buffer[0] = AudioFrame(0.0, 0.0);
|
|
internal_buffer[1] = AudioFrame(0.0, 0.0);
|
|
internal_buffer[2] = AudioFrame(0.0, 0.0);
|
|
internal_buffer[3] = AudioFrame(0.0, 0.0);
|
|
//mix buffer
|
|
_mix_internal(internal_buffer + 4, INTERNAL_BUFFER_LEN);
|
|
mix_offset = 0;
|
|
}
|
|
|
|
void AudioStreamPlaybackResampled::mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames) {
|
|
|
|
float target_rate = AudioServer::get_singleton()->get_mix_rate() * p_rate_scale;
|
|
|
|
uint64_t mix_increment = uint64_t((get_stream_sampling_rate() / double(target_rate)) * double(FP_LEN));
|
|
|
|
for (int i = 0; i < p_frames; i++) {
|
|
|
|
uint32_t idx = CUBIC_INTERP_HISTORY + uint32_t(mix_offset >> FP_BITS);
|
|
//standard cubic interpolation (great quality/performance ratio)
|
|
//this used to be moved to a LUT for greater performance, but nowadays CPU speed is generally faster than memory.
|
|
float mu = (mix_offset & FP_MASK) / float(FP_LEN);
|
|
AudioFrame y0 = internal_buffer[idx - 3];
|
|
AudioFrame y1 = internal_buffer[idx - 2];
|
|
AudioFrame y2 = internal_buffer[idx - 1];
|
|
AudioFrame y3 = internal_buffer[idx - 0];
|
|
|
|
float mu2 = mu * mu;
|
|
AudioFrame a0 = y3 - y2 - y0 + y1;
|
|
AudioFrame a1 = y0 - y1 - a0;
|
|
AudioFrame a2 = y2 - y0;
|
|
AudioFrame a3 = y1;
|
|
|
|
p_buffer[i] = (a0 * mu * mu2 + a1 * mu2 + a2 * mu + a3);
|
|
|
|
mix_offset += mix_increment;
|
|
|
|
while ((mix_offset >> FP_BITS) >= INTERNAL_BUFFER_LEN) {
|
|
|
|
internal_buffer[0] = internal_buffer[INTERNAL_BUFFER_LEN + 0];
|
|
internal_buffer[1] = internal_buffer[INTERNAL_BUFFER_LEN + 1];
|
|
internal_buffer[2] = internal_buffer[INTERNAL_BUFFER_LEN + 2];
|
|
internal_buffer[3] = internal_buffer[INTERNAL_BUFFER_LEN + 3];
|
|
_mix_internal(internal_buffer + 4, INTERNAL_BUFFER_LEN);
|
|
mix_offset -= (INTERNAL_BUFFER_LEN << FP_BITS);
|
|
}
|
|
}
|
|
}
|
|
////////////////////////////////
|
|
|
|
void AudioStreamRandomPitch::set_audio_stream(const Ref<AudioStream> &p_audio_stream) {
|
|
|
|
audio_stream = p_audio_stream;
|
|
if (audio_stream.is_valid()) {
|
|
for (Set<AudioStreamPlaybackRandomPitch *>::Element *E = playbacks.front(); E; E = E->next()) {
|
|
E->get()->playback = audio_stream->instance_playback();
|
|
}
|
|
}
|
|
}
|
|
|
|
Ref<AudioStream> AudioStreamRandomPitch::get_audio_stream() const {
|
|
|
|
return audio_stream;
|
|
}
|
|
|
|
void AudioStreamRandomPitch::set_random_pitch(float p_pitch) {
|
|
|
|
if (p_pitch < 1)
|
|
p_pitch = 1;
|
|
random_pitch = p_pitch;
|
|
}
|
|
|
|
float AudioStreamRandomPitch::get_random_pitch() const {
|
|
return random_pitch;
|
|
}
|
|
|
|
Ref<AudioStreamPlayback> AudioStreamRandomPitch::instance_playback() {
|
|
Ref<AudioStreamPlaybackRandomPitch> playback;
|
|
playback.instance();
|
|
if (audio_stream.is_valid())
|
|
playback->playback = audio_stream->instance_playback();
|
|
|
|
playbacks.insert(playback.ptr());
|
|
playback->random_pitch = Ref<AudioStreamRandomPitch>((AudioStreamRandomPitch *)this);
|
|
return playback;
|
|
}
|
|
|
|
String AudioStreamRandomPitch::get_stream_name() const {
|
|
|
|
if (audio_stream.is_valid()) {
|
|
return "Random: " + audio_stream->get_name();
|
|
}
|
|
return "RandomPitch";
|
|
}
|
|
|
|
void AudioStreamRandomPitch::_bind_methods() {
|
|
|
|
ClassDB::bind_method(D_METHOD("set_audio_stream", "stream"), &AudioStreamRandomPitch::set_audio_stream);
|
|
ClassDB::bind_method(D_METHOD("get_audio_stream"), &AudioStreamRandomPitch::get_audio_stream);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_random_pitch", "scale"), &AudioStreamRandomPitch::set_random_pitch);
|
|
ClassDB::bind_method(D_METHOD("get_random_pitch"), &AudioStreamRandomPitch::get_random_pitch);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "audio_stream", PROPERTY_HINT_RESOURCE_TYPE, "AudioStream"), "set_audio_stream", "get_audio_stream");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "random_pitch", PROPERTY_HINT_RANGE, "1,16,0.01"), "set_random_pitch", "get_random_pitch");
|
|
}
|
|
|
|
AudioStreamRandomPitch::AudioStreamRandomPitch() {
|
|
random_pitch = 1.1;
|
|
}
|
|
|
|
void AudioStreamPlaybackRandomPitch::start(float p_from_pos) {
|
|
playing = playback;
|
|
float range_from = 1.0 / random_pitch->random_pitch;
|
|
float range_to = random_pitch->random_pitch;
|
|
|
|
pitch_scale = range_from + Math::randf() * (range_to - range_from);
|
|
|
|
if (playing.is_valid()) {
|
|
playing->start(p_from_pos);
|
|
}
|
|
}
|
|
|
|
void AudioStreamPlaybackRandomPitch::stop() {
|
|
if (playing.is_valid()) {
|
|
playing->stop();
|
|
;
|
|
}
|
|
}
|
|
bool AudioStreamPlaybackRandomPitch::is_playing() const {
|
|
if (playing.is_valid()) {
|
|
return playing->is_playing();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
int AudioStreamPlaybackRandomPitch::get_loop_count() const {
|
|
if (playing.is_valid()) {
|
|
return playing->get_loop_count();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
float AudioStreamPlaybackRandomPitch::get_pos() const {
|
|
if (playing.is_valid()) {
|
|
return playing->get_pos();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
void AudioStreamPlaybackRandomPitch::seek_pos(float p_time) {
|
|
if (playing.is_valid()) {
|
|
playing->seek_pos(p_time);
|
|
}
|
|
}
|
|
|
|
void AudioStreamPlaybackRandomPitch::mix(AudioFrame *p_bufer, float p_rate_scale, int p_frames) {
|
|
if (playing.is_valid()) {
|
|
playing->mix(p_bufer, p_rate_scale * pitch_scale, p_frames);
|
|
} else {
|
|
for (int i = 0; i < p_frames; i++) {
|
|
p_bufer[i] = AudioFrame(0, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
float AudioStreamPlaybackRandomPitch::get_length() const {
|
|
if (playing.is_valid()) {
|
|
return playing->get_length();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
AudioStreamPlaybackRandomPitch::~AudioStreamPlaybackRandomPitch() {
|
|
random_pitch->playbacks.erase(this);
|
|
}
|