ae09b55a19
Also added an easier way to load native GLSL shaders. Extras: Had to fix no-cache for subresources in resource loader, it was not properly working, making shaders not properly reload. Note: The precommit hooks are broken because they don't seem to support enums from one class being used in another. Feel free to fix this after merging this PR.
411 lines
12 KiB
C++
411 lines
12 KiB
C++
/*************************************************************************/
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/* video_stream_gdnative.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "video_stream_gdnative.h"
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#include "core/project_settings.h"
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#include "servers/audio_server.h"
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VideoDecoderServer *VideoDecoderServer::instance = nullptr;
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static VideoDecoderServer decoder_server;
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const int AUX_BUFFER_SIZE = 1024; // Buffer 1024 samples.
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// NOTE: Callbacks for the GDNative libraries.
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extern "C" {
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godot_int GDAPI godot_videodecoder_file_read(void *ptr, uint8_t *buf, int buf_size) {
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// ptr is a FileAccess
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FileAccess *file = reinterpret_cast<FileAccess *>(ptr);
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// if file exists
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if (file) {
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long bytes_read = file->get_buffer(buf, buf_size);
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// No bytes to read => EOF
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if (bytes_read == 0) {
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return 0;
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}
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return bytes_read;
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}
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return -1;
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}
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int64_t GDAPI godot_videodecoder_file_seek(void *ptr, int64_t pos, int whence) {
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// file
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FileAccess *file = reinterpret_cast<FileAccess *>(ptr);
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if (file) {
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size_t len = file->get_len();
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switch (whence) {
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case SEEK_SET: {
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// Just for explicitness
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size_t new_pos = static_cast<size_t>(pos);
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if (new_pos > len) {
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return -1;
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}
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file->seek(new_pos);
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pos = static_cast<int64_t>(file->get_position());
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return pos;
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} break;
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case SEEK_CUR: {
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// Just in case it doesn't exist
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if (pos < 0 && (size_t)-pos > file->get_position()) {
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return -1;
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}
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pos = pos + static_cast<int>(file->get_position());
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file->seek(pos);
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pos = static_cast<int64_t>(file->get_position());
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return pos;
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} break;
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case SEEK_END: {
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// Just in case something goes wrong
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if ((size_t)-pos > len) {
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return -1;
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}
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file->seek_end(pos);
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pos = static_cast<int64_t>(file->get_position());
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return pos;
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} break;
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default: {
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// Only 4 possible options, hence default = AVSEEK_SIZE
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// Asks to return the length of file
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return static_cast<int64_t>(len);
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} break;
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}
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}
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// In case nothing works out.
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return -1;
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}
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void GDAPI godot_videodecoder_register_decoder(const godot_videodecoder_interface_gdnative *p_interface) {
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decoder_server.register_decoder_interface(p_interface);
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}
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}
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// VideoStreamPlaybackGDNative starts here.
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bool VideoStreamPlaybackGDNative::open_file(const String &p_file) {
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ERR_FAIL_COND_V(interface == nullptr, false);
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file = FileAccess::open(p_file, FileAccess::READ);
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bool file_opened = interface->open_file(data_struct, file);
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if (file_opened) {
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num_channels = interface->get_channels(data_struct);
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mix_rate = interface->get_mix_rate(data_struct);
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godot_vector2 vec = interface->get_texture_size(data_struct);
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texture_size = *(Vector2 *)&vec;
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// Only do memset if num_channels > 0 otherwise it will crash.
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if (num_channels > 0) {
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pcm = (float *)memalloc(num_channels * AUX_BUFFER_SIZE * sizeof(float));
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memset(pcm, 0, num_channels * AUX_BUFFER_SIZE * sizeof(float));
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}
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pcm_write_idx = -1;
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samples_decoded = 0;
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Ref<Image> img;
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img.instance();
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img->create((int)texture_size.width, false, (int)texture_size.height, Image::FORMAT_RGBA8);
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texture->create_from_image(img);
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}
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return file_opened;
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}
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void VideoStreamPlaybackGDNative::update(float p_delta) {
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if (!playing || paused) {
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return;
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}
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if (!file) {
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return;
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}
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time += p_delta;
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ERR_FAIL_COND(interface == nullptr);
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interface->update(data_struct, p_delta);
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// Don't mix if there's no audio (num_channels == 0).
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if (mix_callback && num_channels > 0) {
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if (pcm_write_idx >= 0) {
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// Previous remains
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int mixed = mix_callback(mix_udata, pcm + pcm_write_idx * num_channels, samples_decoded);
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if (mixed == samples_decoded) {
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pcm_write_idx = -1;
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} else {
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samples_decoded -= mixed;
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pcm_write_idx += mixed;
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}
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}
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if (pcm_write_idx < 0) {
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samples_decoded = interface->get_audioframe(data_struct, pcm, AUX_BUFFER_SIZE);
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pcm_write_idx = mix_callback(mix_udata, pcm, samples_decoded);
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if (pcm_write_idx == samples_decoded) {
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pcm_write_idx = -1;
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} else {
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samples_decoded -= pcm_write_idx;
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}
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}
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}
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if (seek_backward) {
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update_texture();
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seek_backward = false;
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}
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while (interface->get_playback_position(data_struct) < time && playing) {
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update_texture();
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}
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}
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void VideoStreamPlaybackGDNative::update_texture() {
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PackedByteArray *pba = (PackedByteArray *)interface->get_videoframe(data_struct);
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if (pba == nullptr) {
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playing = false;
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return;
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}
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Ref<Image> img = memnew(Image(texture_size.width, texture_size.height, 0, Image::FORMAT_RGBA8, *pba));
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texture->update(img, true);
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}
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// ctor and dtor
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VideoStreamPlaybackGDNative::VideoStreamPlaybackGDNative() :
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texture(Ref<ImageTexture>(memnew(ImageTexture))),
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playing(false),
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paused(false),
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mix_udata(nullptr),
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mix_callback(nullptr),
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num_channels(-1),
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time(0),
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seek_backward(false),
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mix_rate(0),
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delay_compensation(0),
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pcm(nullptr),
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pcm_write_idx(0),
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samples_decoded(0),
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file(nullptr),
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interface(nullptr),
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data_struct(nullptr) {}
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VideoStreamPlaybackGDNative::~VideoStreamPlaybackGDNative() {
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cleanup();
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}
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void VideoStreamPlaybackGDNative::cleanup() {
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if (data_struct)
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interface->destructor(data_struct);
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if (pcm)
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memfree(pcm);
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pcm = nullptr;
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time = 0;
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num_channels = -1;
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interface = nullptr;
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data_struct = nullptr;
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}
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void VideoStreamPlaybackGDNative::set_interface(const godot_videodecoder_interface_gdnative *p_interface) {
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ERR_FAIL_COND(p_interface == nullptr);
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if (interface != nullptr) {
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cleanup();
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}
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interface = p_interface;
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data_struct = interface->constructor((godot_object *)this);
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}
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// controls
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bool VideoStreamPlaybackGDNative::is_playing() const {
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return playing;
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}
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bool VideoStreamPlaybackGDNative::is_paused() const {
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return paused;
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}
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void VideoStreamPlaybackGDNative::play() {
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stop();
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playing = true;
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delay_compensation = ProjectSettings::get_singleton()->get("audio/video_delay_compensation_ms");
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delay_compensation /= 1000.0;
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}
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void VideoStreamPlaybackGDNative::stop() {
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if (playing) {
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seek(0);
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}
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playing = false;
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}
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void VideoStreamPlaybackGDNative::seek(float p_time) {
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ERR_FAIL_COND(interface == nullptr);
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interface->seek(data_struct, p_time);
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if (p_time < time)
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seek_backward = true;
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time = p_time;
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// reset audio buffers
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memset(pcm, 0, num_channels * AUX_BUFFER_SIZE * sizeof(float));
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pcm_write_idx = -1;
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samples_decoded = 0;
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}
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void VideoStreamPlaybackGDNative::set_paused(bool p_paused) {
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paused = p_paused;
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}
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Ref<Texture2D> VideoStreamPlaybackGDNative::get_texture() const {
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return texture;
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}
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float VideoStreamPlaybackGDNative::get_length() const {
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ERR_FAIL_COND_V(interface == nullptr, 0);
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return interface->get_length(data_struct);
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}
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float VideoStreamPlaybackGDNative::get_playback_position() const {
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ERR_FAIL_COND_V(interface == nullptr, 0);
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return interface->get_playback_position(data_struct);
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}
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bool VideoStreamPlaybackGDNative::has_loop() const {
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// TODO: Implement looping?
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return false;
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}
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void VideoStreamPlaybackGDNative::set_loop(bool p_enable) {
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// Do nothing
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}
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void VideoStreamPlaybackGDNative::set_audio_track(int p_idx) {
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ERR_FAIL_COND(interface == nullptr);
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interface->set_audio_track(data_struct, p_idx);
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}
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void VideoStreamPlaybackGDNative::set_mix_callback(AudioMixCallback p_callback, void *p_userdata) {
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mix_udata = p_userdata;
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mix_callback = p_callback;
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}
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int VideoStreamPlaybackGDNative::get_channels() const {
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ERR_FAIL_COND_V(interface == nullptr, 0);
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return (num_channels > 0) ? num_channels : 0;
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}
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int VideoStreamPlaybackGDNative::get_mix_rate() const {
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ERR_FAIL_COND_V(interface == nullptr, 0);
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return mix_rate;
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}
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/* --- NOTE VideoStreamGDNative starts here. ----- */
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Ref<VideoStreamPlayback> VideoStreamGDNative::instance_playback() {
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Ref<VideoStreamPlaybackGDNative> pb = memnew(VideoStreamPlaybackGDNative);
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VideoDecoderGDNative *decoder = decoder_server.get_decoder(file.get_extension().to_lower());
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if (decoder == nullptr)
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return nullptr;
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pb->set_interface(decoder->interface);
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pb->set_audio_track(audio_track);
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if (pb->open_file(file))
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return pb;
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return nullptr;
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}
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void VideoStreamGDNative::set_file(const String &p_file) {
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file = p_file;
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}
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String VideoStreamGDNative::get_file() {
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return file;
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}
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void VideoStreamGDNative::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_file", "file"), &VideoStreamGDNative::set_file);
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ClassDB::bind_method(D_METHOD("get_file"), &VideoStreamGDNative::get_file);
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ADD_PROPERTY(PropertyInfo(Variant::STRING, "file", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "set_file", "get_file");
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}
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void VideoStreamGDNative::set_audio_track(int p_track) {
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audio_track = p_track;
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}
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/* --- NOTE ResourceFormatLoaderVideoStreamGDNative starts here. ----- */
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RES ResourceFormatLoaderVideoStreamGDNative::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, bool p_no_cache) {
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FileAccess *f = FileAccess::open(p_path, FileAccess::READ);
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if (!f) {
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if (r_error) {
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*r_error = ERR_CANT_OPEN;
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}
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return RES();
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}
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memdelete(f);
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VideoStreamGDNative *stream = memnew(VideoStreamGDNative);
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stream->set_file(p_path);
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Ref<VideoStreamGDNative> ogv_stream = Ref<VideoStreamGDNative>(stream);
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if (r_error) {
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*r_error = OK;
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}
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return ogv_stream;
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}
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void ResourceFormatLoaderVideoStreamGDNative::get_recognized_extensions(List<String> *p_extensions) const {
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Map<String, int>::Element *el = VideoDecoderServer::get_instance()->get_extensions().front();
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while (el) {
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p_extensions->push_back(el->key());
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el = el->next();
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}
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}
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bool ResourceFormatLoaderVideoStreamGDNative::handles_type(const String &p_type) const {
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return ClassDB::is_parent_class(p_type, "VideoStream");
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}
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String ResourceFormatLoaderVideoStreamGDNative::get_resource_type(const String &p_path) const {
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String el = p_path.get_extension().to_lower();
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if (VideoDecoderServer::get_instance()->get_extensions().has(el))
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return "VideoStreamGDNative";
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return "";
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}
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