1 files changed, 336 insertions, 0 deletions
diff --git a/modules/gdnative/videodecoder/video_stream_gdnative.cpp b/modules/gdnative/videodecoder/video_stream_gdnative.cpp
new file mode 100644
index 0000000000..a959a4c8ae
--- /dev/null
+++ b/modules/gdnative/videodecoder/video_stream_gdnative.cpp
@@ -0,0 +1,336 @@
+/*************************************************************************/
+/*  video_stream_gdnative.cpp                                            */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2018 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 "video_stream_gdnative.h"
+#include <project_settings.h>
+#include <servers/audio_server.h>
+
+VideoDecoderServer *VideoDecoderServer::instance = NULL;
+
+static VideoDecoderServer decoder_server;
+
+// NOTE: Callbacks for the GDNative libraries.
+extern "C" {
+godot_int GDAPI godot_videodecoder_file_read(void *ptr, uint8_t *buf, int buf_size) {
+	// ptr is a FileAccess
+	FileAccess *file = reinterpret_cast<FileAccess *>(ptr);
+
+	// if file exists
+	if (file) {
+		long bytes_read = file->get_buffer(buf, buf_size);
+		// No bytes to read => EOF
+		if (bytes_read == 0) {
+			return 0;
+		}
+		return bytes_read;
+	}
+	return -1;
+}
+
+int64_t GDAPI godot_videodecoder_file_seek(void *ptr, int64_t pos, int whence) {
+	// file
+	FileAccess *file = reinterpret_cast<FileAccess *>(ptr);
+
+	size_t len = file->get_len();
+	if (file) {
+		switch (whence) {
+			case SEEK_SET: {
+				// Just for explicitness
+				size_t new_pos = static_cast<size_t>(pos);
+				if (new_pos > len) {
+					return -1;
+				}
+				file->seek(new_pos);
+				pos = static_cast<int64_t>(file->get_position());
+				return pos;
+			} break;
+			case SEEK_CUR: {
+				// Just in case it doesn't exist
+				if (pos < 0 && -pos > file->get_position()) {
+					return -1;
+				}
+				pos = pos + static_cast<int>(file->get_position());
+				file->seek(pos);
+				pos = static_cast<int64_t>(file->get_position());
+				return pos;
+			} break;
+			case SEEK_END: {
+				// Just in case something goes wrong
+				if (-pos > len) {
+					return -1;
+				}
+				file->seek_end(pos);
+				pos = static_cast<int64_t>(file->get_position());
+				return pos;
+			} break;
+			default: {
+				// Only 4 possible options, hence default = AVSEEK_SIZE
+				// Asks to return the length of file
+				return static_cast<int64_t>(len);
+			} break;
+		}
+	}
+	// In case nothing works out.
+	return -1;
+}
+
+void GDAPI godot_videodecoder_register_decoder(const godot_videodecoder_interface_gdnative *p_interface) {
+
+	decoder_server.register_decoder_interface(p_interface);
+}
+}
+
+// VideoStreamPlaybackGDNative starts here.
+
+bool VideoStreamPlaybackGDNative::open_file(const String &p_file) {
+	ERR_FAIL_COND_V(interface == NULL, false);
+	file = FileAccess::open(p_file, FileAccess::READ);
+	bool file_opened = interface->open_file(data_struct, file);
+
+	num_channels = interface->get_channels(data_struct);
+	mix_rate = interface->get_mix_rate(data_struct);
+
+	godot_vector2 vec = interface->get_texture_size(data_struct);
+	texture_size = *(Vector2 *)&vec;
+
+	pcm = (float *)memalloc(num_channels * AUX_BUFFER_SIZE * sizeof(float));
+	memset(pcm, 0, num_channels * AUX_BUFFER_SIZE * sizeof(float));
+	pcm_write_idx = -1;
+	samples_decoded = 0;
+
+	texture->create((int)texture_size.width, (int)texture_size.height, Image::FORMAT_RGBA8, Texture::FLAG_FILTER | Texture::FLAG_VIDEO_SURFACE);
+
+	return file_opened;
+}
+
+void VideoStreamPlaybackGDNative::update(float p_delta) {
+	if (!playing || paused) {
+		return;
+	}
+	if (!file) {
+		return;
+	}
+	time += p_delta;
+	ERR_FAIL_COND(interface == NULL);
+	interface->update(data_struct, p_delta);
+
+	if (pcm_write_idx >= 0) {
+		// Previous remains
+		int mixed = mix_callback(mix_udata, pcm, samples_decoded);
+		if (mixed == samples_decoded) {
+			pcm_write_idx = -1;
+		} else {
+			samples_decoded -= mixed;
+			pcm_write_idx += mixed;
+		}
+	}
+	if (pcm_write_idx < 0) {
+		samples_decoded = interface->get_audioframe(data_struct, pcm, AUX_BUFFER_SIZE);
+		pcm_write_idx = mix_callback(mix_udata, pcm, samples_decoded);
+		if (pcm_write_idx == samples_decoded) {
+			pcm_write_idx = -1;
+		} else {
+			samples_decoded -= pcm_write_idx;
+		}
+	}
+
+	while (interface->get_playback_position(data_struct) < time) {
+
+		update_texture();
+	}
+}
+
+void VideoStreamPlaybackGDNative::update_texture() {
+	PoolByteArray *pba = (PoolByteArray *)interface->get_videoframe(data_struct);
+
+	if (pba == NULL) {
+		playing = false;
+		return;
+	}
+
+	Ref<Image> img = memnew(Image(texture_size.width, texture_size.height, 0, Image::FORMAT_RGBA8, *pba));
+
+	texture->set_data(img);
+}
+
+// ctor and dtor
+
+VideoStreamPlaybackGDNative::VideoStreamPlaybackGDNative() :
+		texture(Ref<ImageTexture>(memnew(ImageTexture))),
+		time(0),
+		mix_udata(NULL),
+		mix_callback(NULL),
+		num_channels(-1),
+		mix_rate(0),
+		playing(false) {}
+
+VideoStreamPlaybackGDNative::~VideoStreamPlaybackGDNative() {
+	cleanup();
+}
+
+void VideoStreamPlaybackGDNative::cleanup() {
+	if (data_struct)
+		interface->destructor(data_struct);
+	memfree(pcm);
+	pcm = NULL;
+	time = 0;
+	num_channels = -1;
+	interface = NULL;
+	data_struct = NULL;
+}
+
+void VideoStreamPlaybackGDNative::set_interface(const godot_videodecoder_interface_gdnative *p_interface) {
+	ERR_FAIL_COND(p_interface == NULL);
+	if (interface != NULL) {
+		cleanup();
+	}
+	interface = p_interface;
+	data_struct = interface->constructor((godot_object *)this);
+}
+
+// controls
+
+bool VideoStreamPlaybackGDNative::is_playing() const {
+	return playing;
+}
+
+bool VideoStreamPlaybackGDNative::is_paused() const {
+	return paused;
+}
+
+void VideoStreamPlaybackGDNative::play() {
+
+	stop();
+
+	playing = true;
+
+	delay_compensation = ProjectSettings::get_singleton()->get("audio/video_delay_compensation_ms");
+	delay_compensation /= 1000.0;
+}
+
+void VideoStreamPlaybackGDNative::stop() {
+	if (playing) {
+		seek(0);
+	}
+	playing = false;
+}
+
+void VideoStreamPlaybackGDNative::seek(float p_time) {
+	ERR_FAIL_COND(interface == NULL);
+	interface->seek(data_struct, p_time);
+}
+
+void VideoStreamPlaybackGDNative::set_paused(bool p_paused) {
+	paused = p_paused;
+}
+
+Ref<Texture> VideoStreamPlaybackGDNative::get_texture() {
+	return texture;
+}
+
+float VideoStreamPlaybackGDNative::get_length() const {
+	ERR_FAIL_COND_V(interface == NULL, 0);
+	return interface->get_length(data_struct);
+}
+
+float VideoStreamPlaybackGDNative::get_playback_position() const {
+
+	ERR_FAIL_COND_V(interface == NULL, 0);
+	return interface->get_playback_position(data_struct);
+}
+
+bool VideoStreamPlaybackGDNative::has_loop() const {
+	// TODO: Implement looping?
+	return false;
+}
+
+void VideoStreamPlaybackGDNative::set_loop(bool p_enable) {
+	// Do nothing
+}
+
+void VideoStreamPlaybackGDNative::set_audio_track(int p_idx) {
+	ERR_FAIL_COND(interface == NULL);
+	interface->set_audio_track(data_struct, p_idx);
+}
+
+void VideoStreamPlaybackGDNative::set_mix_callback(AudioMixCallback p_callback, void *p_userdata) {
+
+	mix_udata = p_userdata;
+	mix_callback = p_callback;
+}
+
+int VideoStreamPlaybackGDNative::get_channels() const {
+	ERR_FAIL_COND_V(interface == NULL, 0);
+
+	return (num_channels > 0) ? num_channels : 0;
+}
+
+int VideoStreamPlaybackGDNative::get_mix_rate() const {
+	ERR_FAIL_COND_V(interface == NULL, 0);
+
+	return mix_rate;
+}
+
+/* --- NOTE VideoStreamGDNative starts here. ----- */
+
+Ref<VideoStreamPlayback> VideoStreamGDNative::instance_playback() {
+	Ref<VideoStreamPlaybackGDNative> pb = memnew(VideoStreamPlaybackGDNative);
+	VideoDecoderGDNative *decoder = decoder_server.get_decoder(file.get_extension().to_lower());
+	if (decoder == NULL)
+		return NULL;
+	pb->set_interface(decoder->interface);
+	pb->set_audio_track(audio_track);
+	if (pb->open_file(file))
+		return pb;
+	return NULL;
+}
+
+void VideoStreamGDNative::set_file(const String &p_file) {
+
+	file = p_file;
+}
+
+String VideoStreamGDNative::get_file() {
+
+	return file;
+}
+
+void VideoStreamGDNative::_bind_methods() {
+
+	ClassDB::bind_method(D_METHOD("set_file", "file"), &VideoStreamGDNative::set_file);
+	ClassDB::bind_method(D_METHOD("get_file"), &VideoStreamGDNative::get_file);
+
+	ADD_PROPERTY(PropertyInfo(Variant::STRING, "file", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR | PROPERTY_USAGE_INTERNAL), "set_file", "get_file");
+}
+
+void VideoStreamGDNative::set_audio_track(int p_track) {
+
+	audio_track = p_track;
+}