mirror of
https://github.com/godotengine/godot.git
synced 2024-11-25 05:33:11 +00:00
255 lines
7.7 KiB
C++
255 lines
7.7 KiB
C++
/**************************************************************************/
|
|
/* audio_stream_preview.cpp */
|
|
/**************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/**************************************************************************/
|
|
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
|
|
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
|
|
/* */
|
|
/* 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_preview.h"
|
|
|
|
/////////////////////
|
|
|
|
float AudioStreamPreview::get_length() const {
|
|
return length;
|
|
}
|
|
|
|
float AudioStreamPreview::get_max(float p_time, float p_time_next) const {
|
|
if (length == 0) {
|
|
return 0;
|
|
}
|
|
|
|
int max = preview.size() / 2;
|
|
if (max == 0) {
|
|
return 0;
|
|
}
|
|
|
|
int time_from = p_time / length * max;
|
|
int time_to = p_time_next / length * max;
|
|
time_from = CLAMP(time_from, 0, max - 1);
|
|
time_to = CLAMP(time_to, 0, max - 1);
|
|
|
|
if (time_to <= time_from) {
|
|
time_to = time_from + 1;
|
|
}
|
|
|
|
uint8_t vmax = 0;
|
|
|
|
for (int i = time_from; i < time_to; i++) {
|
|
uint8_t v = preview[i * 2 + 1];
|
|
if (i == 0 || v > vmax) {
|
|
vmax = v;
|
|
}
|
|
}
|
|
|
|
return (vmax / 255.0) * 2.0 - 1.0;
|
|
}
|
|
|
|
float AudioStreamPreview::get_min(float p_time, float p_time_next) const {
|
|
if (length == 0) {
|
|
return 0;
|
|
}
|
|
|
|
int max = preview.size() / 2;
|
|
if (max == 0) {
|
|
return 0;
|
|
}
|
|
|
|
int time_from = p_time / length * max;
|
|
int time_to = p_time_next / length * max;
|
|
time_from = CLAMP(time_from, 0, max - 1);
|
|
time_to = CLAMP(time_to, 0, max - 1);
|
|
|
|
if (time_to <= time_from) {
|
|
time_to = time_from + 1;
|
|
}
|
|
|
|
uint8_t vmin = 255;
|
|
|
|
for (int i = time_from; i < time_to; i++) {
|
|
uint8_t v = preview[i * 2];
|
|
if (i == 0 || v < vmin) {
|
|
vmin = v;
|
|
}
|
|
}
|
|
|
|
return (vmin / 255.0) * 2.0 - 1.0;
|
|
}
|
|
|
|
AudioStreamPreview::AudioStreamPreview() {
|
|
length = 0;
|
|
}
|
|
|
|
////
|
|
|
|
void AudioStreamPreviewGenerator::_update_emit(ObjectID p_id) {
|
|
emit_signal(SNAME("preview_updated"), p_id);
|
|
}
|
|
|
|
void AudioStreamPreviewGenerator::_preview_thread(void *p_preview) {
|
|
Preview *preview = static_cast<Preview *>(p_preview);
|
|
|
|
float muxbuff_chunk_s = 0.25;
|
|
|
|
int mixbuff_chunk_frames = AudioServer::get_singleton()->get_mix_rate() * muxbuff_chunk_s;
|
|
|
|
Vector<AudioFrame> mix_chunk;
|
|
mix_chunk.resize(mixbuff_chunk_frames);
|
|
|
|
int frames_total = AudioServer::get_singleton()->get_mix_rate() * preview->preview->length;
|
|
int frames_todo = frames_total;
|
|
|
|
preview->playback->start();
|
|
|
|
while (frames_todo) {
|
|
int ofs_write = uint64_t(frames_total - frames_todo) * uint64_t(preview->preview->preview.size() / 2) / uint64_t(frames_total);
|
|
int to_read = MIN(frames_todo, mixbuff_chunk_frames);
|
|
int to_write = uint64_t(to_read) * uint64_t(preview->preview->preview.size() / 2) / uint64_t(frames_total);
|
|
to_write = MIN(to_write, (preview->preview->preview.size() / 2) - ofs_write);
|
|
|
|
preview->playback->mix(mix_chunk.ptrw(), 1.0, to_read);
|
|
|
|
for (int i = 0; i < to_write; i++) {
|
|
float max = -1000;
|
|
float min = 1000;
|
|
int from = uint64_t(i) * to_read / to_write;
|
|
int to = (uint64_t(i) + 1) * to_read / to_write;
|
|
to = MIN(to, to_read);
|
|
from = MIN(from, to_read - 1);
|
|
if (to == from) {
|
|
to = from + 1;
|
|
}
|
|
|
|
for (int j = from; j < to; j++) {
|
|
max = MAX(max, mix_chunk[j].l);
|
|
max = MAX(max, mix_chunk[j].r);
|
|
|
|
min = MIN(min, mix_chunk[j].l);
|
|
min = MIN(min, mix_chunk[j].r);
|
|
}
|
|
|
|
uint8_t pfrom = CLAMP((min * 0.5 + 0.5) * 255, 0, 255);
|
|
uint8_t pto = CLAMP((max * 0.5 + 0.5) * 255, 0, 255);
|
|
|
|
preview->preview->preview.write[(ofs_write + i) * 2 + 0] = pfrom;
|
|
preview->preview->preview.write[(ofs_write + i) * 2 + 1] = pto;
|
|
}
|
|
|
|
frames_todo -= to_read;
|
|
callable_mp(singleton, &AudioStreamPreviewGenerator::_update_emit).call_deferred(preview->id);
|
|
}
|
|
|
|
preview->preview->version++;
|
|
|
|
preview->playback->stop();
|
|
|
|
preview->generating.clear();
|
|
}
|
|
|
|
Ref<AudioStreamPreview> AudioStreamPreviewGenerator::generate_preview(const Ref<AudioStream> &p_stream) {
|
|
ERR_FAIL_COND_V(p_stream.is_null(), Ref<AudioStreamPreview>());
|
|
|
|
if (previews.has(p_stream->get_instance_id())) {
|
|
return previews[p_stream->get_instance_id()].preview;
|
|
}
|
|
|
|
//no preview exists
|
|
|
|
previews[p_stream->get_instance_id()] = Preview();
|
|
|
|
Preview *preview = &previews[p_stream->get_instance_id()];
|
|
preview->base_stream = p_stream;
|
|
preview->playback = preview->base_stream->instantiate_playback();
|
|
preview->generating.set();
|
|
preview->id = p_stream->get_instance_id();
|
|
|
|
float len_s = preview->base_stream->get_length();
|
|
if (len_s == 0) {
|
|
len_s = 60 * 5; //five minutes
|
|
}
|
|
|
|
int frames = AudioServer::get_singleton()->get_mix_rate() * len_s;
|
|
|
|
Vector<uint8_t> maxmin;
|
|
int pw = frames / 20;
|
|
maxmin.resize(pw * 2);
|
|
{
|
|
uint8_t *ptr = maxmin.ptrw();
|
|
for (int i = 0; i < pw * 2; i++) {
|
|
ptr[i] = 127;
|
|
}
|
|
}
|
|
|
|
preview->preview.instantiate();
|
|
preview->preview->preview = maxmin;
|
|
preview->preview->length = len_s;
|
|
|
|
if (preview->playback.is_valid()) {
|
|
preview->thread = memnew(Thread);
|
|
preview->thread->set_name("AudioStreamPreviewGenerator");
|
|
preview->thread->start(_preview_thread, preview);
|
|
}
|
|
|
|
return preview->preview;
|
|
}
|
|
|
|
void AudioStreamPreviewGenerator::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("generate_preview", "stream"), &AudioStreamPreviewGenerator::generate_preview);
|
|
|
|
ADD_SIGNAL(MethodInfo("preview_updated", PropertyInfo(Variant::INT, "obj_id")));
|
|
}
|
|
|
|
AudioStreamPreviewGenerator *AudioStreamPreviewGenerator::singleton = nullptr;
|
|
|
|
void AudioStreamPreviewGenerator::_notification(int p_what) {
|
|
switch (p_what) {
|
|
case NOTIFICATION_PROCESS: {
|
|
List<ObjectID> to_erase;
|
|
for (KeyValue<ObjectID, Preview> &E : previews) {
|
|
if (!E.value.generating.is_set()) {
|
|
if (E.value.thread) {
|
|
E.value.thread->wait_to_finish();
|
|
memdelete(E.value.thread);
|
|
E.value.thread = nullptr;
|
|
}
|
|
if (!ObjectDB::get_instance(E.key)) { //no longer in use, get rid of preview
|
|
to_erase.push_back(E.key);
|
|
}
|
|
}
|
|
}
|
|
|
|
while (to_erase.front()) {
|
|
previews.erase(to_erase.front()->get());
|
|
to_erase.pop_front();
|
|
}
|
|
} break;
|
|
}
|
|
}
|
|
|
|
AudioStreamPreviewGenerator::AudioStreamPreviewGenerator() {
|
|
singleton = this;
|
|
set_process(true);
|
|
}
|