godot/scene/resources/video_stream.cpp

/**************************************************************************/
/*  video_stream.cpp                                                      */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
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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.        */
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/* 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. */
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/**************************************************************************/

#include "video_stream.h"

#include "core/config/project_settings.h"
#include "servers/audio_server.h"

// VideoStreamPlayback starts here.

void VideoStreamPlayback::_bind_methods() {
	ClassDB::bind_method(D_METHOD("mix_audio", "num_frames", "buffer", "offset"), &VideoStreamPlayback::mix_audio, DEFVAL(PackedFloat32Array()), DEFVAL(0));
	GDVIRTUAL_BIND(_stop);
	GDVIRTUAL_BIND(_play);
	GDVIRTUAL_BIND(_is_playing);
	GDVIRTUAL_BIND(_set_paused, "paused");
	GDVIRTUAL_BIND(_is_paused);
	GDVIRTUAL_BIND(_get_length);
	GDVIRTUAL_BIND(_get_playback_position);
	GDVIRTUAL_BIND(_seek, "time");
	GDVIRTUAL_BIND(_set_audio_track, "idx");
	GDVIRTUAL_BIND(_get_texture);
	GDVIRTUAL_BIND(_update, "delta");
	GDVIRTUAL_BIND(_get_channels);
	GDVIRTUAL_BIND(_get_mix_rate);
}

VideoStreamPlayback::VideoStreamPlayback() {
}

VideoStreamPlayback::~VideoStreamPlayback() {
}

void VideoStreamPlayback::stop() {
	GDVIRTUAL_CALL(_stop);
}

void VideoStreamPlayback::play() {
	GDVIRTUAL_CALL(_play);
}

bool VideoStreamPlayback::is_playing() const {
	bool ret;
	if (GDVIRTUAL_CALL(_is_playing, ret)) {
		return ret;
	}
	return false;
}

void VideoStreamPlayback::set_paused(bool p_paused) {
	GDVIRTUAL_CALL(_set_paused, p_paused);
}

bool VideoStreamPlayback::is_paused() const {
	bool ret;
	if (GDVIRTUAL_CALL(_is_paused, ret)) {
		return ret;
	}
	return false;
}

double VideoStreamPlayback::get_length() const {
	double ret;
	if (GDVIRTUAL_CALL(_get_length, ret)) {
		return ret;
	}
	return 0;
}

double VideoStreamPlayback::get_playback_position() const {
	double ret;
	if (GDVIRTUAL_CALL(_get_playback_position, ret)) {
		return ret;
	}
	return 0;
}

void VideoStreamPlayback::seek(double p_time) {
	GDVIRTUAL_CALL(_seek, p_time);
}

void VideoStreamPlayback::set_audio_track(int p_idx) {
	GDVIRTUAL_CALL(_set_audio_track, p_idx);
}

Ref<Texture2D> VideoStreamPlayback::get_texture() const {
	Ref<Texture2D> ret;
	if (GDVIRTUAL_CALL(_get_texture, ret)) {
		return ret;
	}
	return nullptr;
}

void VideoStreamPlayback::update(double p_delta) {
	GDVIRTUAL_CALL(_update, p_delta);
}

void VideoStreamPlayback::set_mix_callback(AudioMixCallback p_callback, void *p_userdata) {
	mix_callback = p_callback;
	mix_udata = p_userdata;
}

int VideoStreamPlayback::get_channels() const {
	int ret;
	if (GDVIRTUAL_CALL(_get_channels, ret)) {
		_channel_count = ret;
		return ret;
	}
	return 0;
}

int VideoStreamPlayback::get_mix_rate() const {
	int ret;
	if (GDVIRTUAL_CALL(_get_mix_rate, ret)) {
		return ret;
	}
	return 0;
}

int VideoStreamPlayback::mix_audio(int num_frames, PackedFloat32Array buffer, int offset) {
	if (num_frames <= 0) {
		return 0;
	}
	if (!mix_callback) {
		return -1;
	}
	ERR_FAIL_INDEX_V(offset, buffer.size(), -1);
	ERR_FAIL_INDEX_V((_channel_count < 1 ? 1 : _channel_count) * num_frames - 1, buffer.size() - offset, -1);
	return mix_callback(mix_udata, buffer.ptr() + offset, num_frames);
}

/* --- NOTE VideoStream starts here. ----- */

Ref<VideoStreamPlayback> VideoStream::instantiate_playback() {
	Ref<VideoStreamPlayback> ret;
	if (GDVIRTUAL_CALL(_instantiate_playback, ret)) {
		ERR_FAIL_COND_V_MSG(ret.is_null(), nullptr, "Plugin returned null playback");
		ret->set_audio_track(audio_track);
		return ret;
	}
	return nullptr;
}

void VideoStream::set_file(const String &p_file) {
	file = p_file;
	emit_changed();
}

String VideoStream::get_file() {
	return file;
}

void VideoStream::_bind_methods() {
	ClassDB::bind_method(D_METHOD("set_file", "file"), &VideoStream::set_file);
	ClassDB::bind_method(D_METHOD("get_file"), &VideoStream::get_file);

	ADD_PROPERTY(PropertyInfo(Variant::STRING, "file"), "set_file", "get_file");

	GDVIRTUAL_BIND(_instantiate_playback);
}

VideoStream::VideoStream() {
}

VideoStream::~VideoStream() {
}

void VideoStream::set_audio_track(int p_track) {
	audio_track = p_track;
}