godot/editor/plugins/sample_editor_plugin.cpp

/*************************************************************************/
/*  sample_editor_plugin.cpp                                             */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
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/* 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:                                             */
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/* 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,  */
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/*************************************************************************/
#include "sample_editor_plugin.h"

#include "editor/editor_settings.h"
#include "globals.h"
#include "io/resource_loader.h"

void SampleEditor::_input_event(InputEvent p_event) {
}

void SampleEditor::_notification(int p_what) {

	if (p_what == NOTIFICATION_FIXED_PROCESS) {
	}

	if (p_what == NOTIFICATION_ENTER_TREE) {
		play->set_icon(get_icon("Play", "EditorIcons"));
		stop->set_icon(get_icon("Stop", "EditorIcons"));
	}

	if (p_what == NOTIFICATION_READY) {

		//get_scene()->connect("node_removed",this,"_node_removed");
	}

	if (p_what == NOTIFICATION_DRAW) {
	}
}

void SampleEditor::_play_pressed() {

	player->play("default", true);
	stop->set_pressed(false);
	play->set_pressed(true);
}
void SampleEditor::_stop_pressed() {

	player->stop_all();
	play->set_pressed(false);
}

void SampleEditor::generate_preview_texture(const Ref<Sample> &p_sample, Ref<ImageTexture> &p_texture) {

	DVector<uint8_t> data = p_sample->get_data();

	DVector<uint8_t> img;
	int w = p_texture->get_width();
	int h = p_texture->get_height();
	img.resize(w * h * 3);
	DVector<uint8_t>::Write imgdata = img.write();
	uint8_t *imgw = imgdata.ptr();
	DVector<uint8_t>::Read sampledata = data.read();
	const uint8_t *sdata = sampledata.ptr();

	bool stereo = p_sample->is_stereo();
	bool _16 = p_sample->get_format() == Sample::FORMAT_PCM16;
	int len = p_sample->get_length();

	if (len < 1)
		return;

	if (p_sample->get_format() == Sample::FORMAT_IMA_ADPCM) {

		struct IMA_ADPCM_State {

			int16_t step_index;
			int32_t predictor;
			/* values at loop point */
			int16_t loop_step_index;
			int32_t loop_predictor;
			int32_t last_nibble;
			int32_t loop_pos;
			int32_t window_ofs;
			const uint8_t *ptr;
		} ima_adpcm;

		ima_adpcm.step_index = 0;
		ima_adpcm.predictor = 0;
		ima_adpcm.loop_step_index = 0;
		ima_adpcm.loop_predictor = 0;
		ima_adpcm.last_nibble = -1;
		ima_adpcm.loop_pos = 0x7FFFFFFF;
		ima_adpcm.window_ofs = 0;
		ima_adpcm.ptr = NULL;

		for (int i = 0; i < w; i++) {

			float max[2] = { -1e10, -1e10 };
			float min[2] = { 1e10, 1e10 };
			int from = i * len / w;
			int to = (i + 1) * len / w;
			if (to >= len)
				to = len - 1;

			for (int j = from; j < to; j++) {

				while (j > ima_adpcm.last_nibble) {

					static const int16_t _ima_adpcm_step_table[89] = {
						7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
						19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
						50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
						130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
						337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
						876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
						2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
						5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
						15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
					};

					static const int8_t _ima_adpcm_index_table[16] = {
						-1, -1, -1, -1, 2, 4, 6, 8,
						-1, -1, -1, -1, 2, 4, 6, 8
					};

					int16_t nibble, diff, step;

					ima_adpcm.last_nibble++;
					const uint8_t *src_ptr = sdata;

					int ofs = ima_adpcm.last_nibble >> 1;

					if (stereo)
						ofs *= 2;

					nibble = (ima_adpcm.last_nibble & 1) ?
									 (src_ptr[ofs] >> 4) :
									 (src_ptr[ofs] & 0xF);

					step = _ima_adpcm_step_table[ima_adpcm.step_index];

					ima_adpcm.step_index += _ima_adpcm_index_table[nibble];
					if (ima_adpcm.step_index < 0)
						ima_adpcm.step_index = 0;
					if (ima_adpcm.step_index > 88)
						ima_adpcm.step_index = 88;

					diff = step >> 3;
					if (nibble & 1)
						diff += step >> 2;
					if (nibble & 2)
						diff += step >> 1;
					if (nibble & 4)
						diff += step;
					if (nibble & 8)
						diff = -diff;

					ima_adpcm.predictor += diff;
					if (ima_adpcm.predictor < -0x8000)
						ima_adpcm.predictor = -0x8000;
					else if (ima_adpcm.predictor > 0x7FFF)
						ima_adpcm.predictor = 0x7FFF;

					/* store loop if there */
					if (ima_adpcm.last_nibble == ima_adpcm.loop_pos) {

						ima_adpcm.loop_step_index = ima_adpcm.step_index;
						ima_adpcm.loop_predictor = ima_adpcm.predictor;
					}
				}

				float v = ima_adpcm.predictor / 32767.0;
				if (v > max[0])
					max[0] = v;
				if (v < min[0])
					min[0] = v;
			}

			for (int j = 0; j < h; j++) {
				float v = (j / (float)h) * 2.0 - 1.0;
				uint8_t *imgofs = &imgw[(uint64_t(j) * w + i) * 3];
				if (v > min[0] && v < max[0]) {
					imgofs[0] = 255;
					imgofs[1] = 150;
					imgofs[2] = 80;
				} else {
					imgofs[0] = 0;
					imgofs[1] = 0;
					imgofs[2] = 0;
				}
			}
		}
	} else {
		for (int i = 0; i < w; i++) {
			// i trust gcc will optimize this loop
			float max[2] = { -1e10, -1e10 };
			float min[2] = { 1e10, 1e10 };
			int c = stereo ? 2 : 1;
			int from = uint64_t(i) * len / w;
			int to = (uint64_t(i) + 1) * len / w;
			if (to >= len)
				to = len - 1;

			if (_16) {
				const int16_t *src = (const int16_t *)sdata;

				for (int j = 0; j < c; j++) {

					for (int k = from; k <= to; k++) {

						float v = src[uint64_t(k) * c + j] / 32768.0;
						if (v > max[j])
							max[j] = v;
						if (v < min[j])
							min[j] = v;
					}
				}
			} else {

				const int8_t *src = (const int8_t *)sdata;

				for (int j = 0; j < c; j++) {

					for (int k = from; k <= to; k++) {

						float v = src[uint64_t(k) * c + j] / 128.0;
						if (v > max[j])
							max[j] = v;
						if (v < min[j])
							min[j] = v;
					}
				}
			}

			if (!stereo) {
				for (int j = 0; j < h; j++) {
					float v = (j / (float)h) * 2.0 - 1.0;
					uint8_t *imgofs = &imgw[(uint64_t(j) * w + i) * 3];
					if (v > min[0] && v < max[0]) {
						imgofs[0] = 255;
						imgofs[1] = 150;
						imgofs[2] = 80;
					} else {
						imgofs[0] = 0;
						imgofs[1] = 0;
						imgofs[2] = 0;
					}
				}
			} else {

				for (int j = 0; j < h; j++) {

					int half;
					float v;
					if (j < (h / 2)) {
						half = 0;
						v = (j / (float)(h / 2)) * 2.0 - 1.0;
					} else {
						half = 1;
						v = ((j - (h / 2)) / (float)(h / 2)) * 2.0 - 1.0;
					}

					uint8_t *imgofs = &imgw[(uint64_t(j) * w + i) * 3];
					if (v > min[half] && v < max[half]) {
						imgofs[0] = 255;
						imgofs[1] = 150;
						imgofs[2] = 80;
					} else {
						imgofs[0] = 0;
						imgofs[1] = 0;
						imgofs[2] = 0;
					}
				}
			}
		}
	}

	imgdata = DVector<uint8_t>::Write();

	p_texture->set_data(Image(w, h, 0, Image::FORMAT_RGB, img));
}

void SampleEditor::_update_sample() {

	player->stop_all();

	generate_preview_texture(sample, peakdisplay);
	info_label->set_text(TTR("Length:") + " " + String::num(sample->get_length() / (float)sample->get_mix_rate(), 2) + "s");

	if (library->has_sample("default"))
		library->remove_sample("default");

	library->add_sample("default", sample);
}

void SampleEditor::edit(Ref<Sample> p_sample) {

	sample = p_sample;

	if (!sample.is_null())
		_update_sample();
	else {

		hide();
		set_fixed_process(false);
	}
}

void SampleEditor::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("_input_event"), &SampleEditor::_input_event);
	ObjectTypeDB::bind_method(_MD("_play_pressed"), &SampleEditor::_play_pressed);
	ObjectTypeDB::bind_method(_MD("_stop_pressed"), &SampleEditor::_stop_pressed);
}

SampleEditor::SampleEditor() {

	player = memnew(SamplePlayer);
	add_child(player);
	add_style_override("panel", get_stylebox("panel", "Panel"));
	library = Ref<SampleLibrary>(memnew(SampleLibrary));
	player->set_sample_library(library);
	sample_texframe = memnew(TextureFrame);
	add_child(sample_texframe);
	sample_texframe->set_anchor_and_margin(MARGIN_LEFT, ANCHOR_BEGIN, 5);
	sample_texframe->set_anchor_and_margin(MARGIN_RIGHT, ANCHOR_END, 5);
	sample_texframe->set_anchor_and_margin(MARGIN_TOP, ANCHOR_BEGIN, 30);
	sample_texframe->set_anchor_and_margin(MARGIN_BOTTOM, ANCHOR_END, 5);

	info_label = memnew(Label);
	sample_texframe->add_child(info_label);
	info_label->set_area_as_parent_rect();
	info_label->set_anchor_and_margin(MARGIN_TOP, ANCHOR_END, 15);
	info_label->set_margin(MARGIN_BOTTOM, 4);
	info_label->set_margin(MARGIN_RIGHT, 4);
	info_label->set_align(Label::ALIGN_RIGHT);

	play = memnew(Button);

	play->set_pos(Point2(5, 5));
	play->set_size(Size2(1, 1));
	play->set_toggle_mode(true);
	add_child(play);

	stop = memnew(Button);

	stop->set_pos(Point2(35, 5));
	stop->set_size(Size2(1, 1));
	stop->set_toggle_mode(true);
	add_child(stop);

	peakdisplay = Ref<ImageTexture>(memnew(ImageTexture));
	peakdisplay->create(EDITOR_DEF("audio/sample_editor_preview_width", 512), EDITOR_DEF("audio/sample_editor_preview_height", 128), Image::FORMAT_RGB);
	sample_texframe->set_expand(true);
	sample_texframe->set_texture(peakdisplay);

	play->connect("pressed", this, "_play_pressed");
	stop->connect("pressed", this, "_stop_pressed");

	set_custom_minimum_size(Size2(1, 150) * EDSCALE);
}

void SampleEditorPlugin::edit(Object *p_object) {

	Sample *s = p_object->cast_to<Sample>();
	if (!s)
		return;

	sample_editor->edit(Ref<Sample>(s));
}

bool SampleEditorPlugin::handles(Object *p_object) const {

	return p_object->is_type("Sample");
}

void SampleEditorPlugin::make_visible(bool p_visible) {

	if (p_visible) {
		sample_editor->show();
		//		sample_editor->set_process(true);
	} else {

		sample_editor->hide();
		//		sample_editor->set_process(false);
	}
}

SampleEditorPlugin::SampleEditorPlugin(EditorNode *p_node) {

	editor = p_node;
	sample_editor = memnew(SampleEditor);
	add_control_to_container(CONTAINER_PROPERTY_EDITOR_BOTTOM, sample_editor);
	sample_editor->hide();
}

SampleEditorPlugin::~SampleEditorPlugin() {
}