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virtualx-engine/scene/gui/video_player.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020 
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* video_player.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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_player.h"
#include "scene/scene_string_names.h"
#include "core/os/os.h"
#include "servers/audio_server.h"
int VideoPlayer::sp_get_channel_count() const {
if (playback.is_null()) {
return 0;
}
return playback->get_channels();
}
bool VideoPlayer::mix(AudioFrame *p_buffer, int p_frames) {
// Check the amount resampler can really handle.
// If it cannot, wait "wait_resampler_phase_limit" times.
// This mechanism contributes to smoother pause/unpause operation.
if (p_frames <= resampler.get_num_of_ready_frames() ||
wait_resampler_limit <= wait_resampler) {
wait_resampler = 0;
return resampler.mix(p_buffer, p_frames);
}
wait_resampler++;
return false;
}
// Called from main thread (eg VideoStreamPlaybackWebm::update)
int VideoPlayer::_audio_mix_callback(void *p_udata, const float *p_data, int p_frames) {
ERR_FAIL_NULL_V(p_udata, 0);
ERR_FAIL_NULL_V(p_data, 0);
VideoPlayer *vp = (VideoPlayer *)p_udata;
int todo = MIN(vp->resampler.get_writer_space(), p_frames);
float *wb = vp->resampler.get_write_buffer();
int c = vp->resampler.get_channel_count();
for (int i = 0; i < todo * c; i++) {
wb[i] = p_data[i];
}
vp->resampler.write(todo);
return todo;
}
void VideoPlayer::_mix_audios(void *p_self) {
ERR_FAIL_NULL(p_self);
reinterpret_cast<VideoPlayer *>(p_self)->_mix_audio();
}
// Called from audio thread
void VideoPlayer::_mix_audio() {
if (!stream.is_valid()) {
return;
}
if (!playback.is_valid() || !playback->is_playing() || playback->is_paused()) {
return;
}
AudioFrame *buffer = mix_buffer.ptrw();
int buffer_size = mix_buffer.size();
// Resample
if (!mix(buffer, buffer_size))
return;
AudioFrame vol = AudioFrame(volume, volume);
int cc = AudioServer::get_singleton()->get_channel_count();
if (cc == 1) {
AudioFrame *target = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, 0);
ERR_FAIL_COND(!target);
for (int j = 0; j < buffer_size; j++) {
target[j] += buffer[j] * vol;
}
} else {
AudioFrame *targets[4];
for (int k = 0; k < cc; k++) {
targets[k] = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus_index, k);
ERR_FAIL_COND(!targets[k]);
}
for (int j = 0; j < buffer_size; j++) {
AudioFrame frame = buffer[j] * vol;
for (int k = 0; k < cc; k++) {
targets[k][j] += frame;
}
}
}
}
void VideoPlayer::_notification(int p_notification) {
switch (p_notification) {
case NOTIFICATION_ENTER_TREE: {
AudioServer::get_singleton()->add_callback(_mix_audios, this);
if (stream.is_valid() && autoplay && !Engine::get_singleton()->is_editor_hint()) {
play();
}
} break;
case NOTIFICATION_EXIT_TREE: {
AudioServer::get_singleton()->remove_callback(_mix_audios, this);
} break;
case NOTIFICATION_INTERNAL_PROCESS: {
bus_index = AudioServer::get_singleton()->thread_find_bus_index(bus);
if (stream.is_null() || paused || playback.is_null() || !playback->is_playing())
return;
double audio_time = USEC_TO_SEC(OS::get_singleton()->get_ticks_usec());
double delta = last_audio_time == 0 ? 0 : audio_time - last_audio_time;
last_audio_time = audio_time;
if (delta == 0)
return;
playback->update(delta); // playback->is_playing() returns false in the last video frame
if (!playback->is_playing()) {
emit_signal(SceneStringNames::get_singleton()->finished);
}
} break;
case NOTIFICATION_DRAW: {
if (texture.is_null())
return;
if (texture->get_width() == 0)
return;
Size2 s = expand ? get_size() : texture->get_size();
draw_texture_rect(texture, Rect2(Point2(), s), false);
} break;
};
};
Size2 VideoPlayer::get_minimum_size() const {
if (!expand && !texture.is_null())
return texture->get_size();
else
return Size2();
}
void VideoPlayer::set_expand(bool p_expand) {
expand = p_expand;
update();
minimum_size_changed();
}
bool VideoPlayer::has_expand() const {
return expand;
}
void VideoPlayer::set_stream(const Ref<VideoStream> &p_stream) {
stop();
AudioServer::get_singleton()->lock();
mix_buffer.resize(AudioServer::get_singleton()->thread_get_mix_buffer_size());
AudioServer::get_singleton()->unlock();
stream = p_stream;
if (stream.is_valid()) {
stream->set_audio_track(audio_track);
playback = stream->instance_playback();
} else {
playback = Ref<VideoStreamPlayback>();
}
if (!playback.is_null()) {
playback->set_loop(loops);
playback->set_paused(paused);
texture = playback->get_texture();
const int channels = playback->get_channels();
AudioServer::get_singleton()->lock();
if (channels > 0)
resampler.setup(channels, playback->get_mix_rate(), AudioServer::get_singleton()->get_mix_rate(), buffering_ms, 0);
else
resampler.clear();
AudioServer::get_singleton()->unlock();
if (channels > 0)
playback->set_mix_callback(_audio_mix_callback, this);
} else {
texture.unref();
AudioServer::get_singleton()->lock();
resampler.clear();
AudioServer::get_singleton()->unlock();
}
update();
};
Ref<VideoStream> VideoPlayer::get_stream() const {
return stream;
};
void VideoPlayer::play() {
ERR_FAIL_COND(!is_inside_tree());
if (playback.is_null())
return;
playback->stop();
playback->play();
set_process_internal(true);
// AudioServer::get_singleton()->stream_set_active(stream_rid,true);
// AudioServer::get_singleton()->stream_set_volume_scale(stream_rid,volume);
last_audio_time = 0;
};
void VideoPlayer::stop() {
if (!is_inside_tree())
return;
if (playback.is_null())
return;
playback->stop();
// AudioServer::get_singleton()->stream_set_active(stream_rid,false);
resampler.flush();
set_process_internal(false);
last_audio_time = 0;
};
bool VideoPlayer::is_playing() const {
if (playback.is_null())
return false;
return playback->is_playing();
};
void VideoPlayer::set_paused(bool p_paused) {
paused = p_paused;
if (playback.is_valid()) {
playback->set_paused(p_paused);
set_process_internal(!p_paused);
};
last_audio_time = 0;
};
bool VideoPlayer::is_paused() const {
return paused;
}
void VideoPlayer::set_buffering_msec(int p_msec) {
buffering_ms = p_msec;
}
int VideoPlayer::get_buffering_msec() const {
return buffering_ms;
}
void VideoPlayer::set_audio_track(int p_track) {
audio_track = p_track;
}
int VideoPlayer::get_audio_track() const {
return audio_track;
}
void VideoPlayer::set_volume(float p_vol) {
volume = p_vol;
};
float VideoPlayer::get_volume() const {
return volume;
};
void VideoPlayer::set_volume_db(float p_db) {
if (p_db < -79)
set_volume(0);
else
set_volume(Math::db2linear(p_db));
};
float VideoPlayer::get_volume_db() const {
if (volume == 0)
return -80;
else
return Math::linear2db(volume);
};
String VideoPlayer::get_stream_name() const {
if (stream.is_null())
return "<No Stream>";
return stream->get_name();
};
float VideoPlayer::get_stream_position() const {
if (playback.is_null())
return 0;
return playback->get_playback_position();
};
void VideoPlayer::set_stream_position(float p_position) {
if (playback.is_valid())
playback->seek(p_position);
}
Ref<Texture> VideoPlayer::get_video_texture() const {
if (playback.is_valid())
return playback->get_texture();
return Ref<Texture>();
}
void VideoPlayer::set_autoplay(bool p_enable) {
autoplay = p_enable;
};
bool VideoPlayer::has_autoplay() const {
return autoplay;
};
void VideoPlayer::set_bus(const StringName &p_bus) {
//if audio is active, must lock this
AudioServer::get_singleton()->lock();
bus = p_bus;
AudioServer::get_singleton()->unlock();
}
StringName VideoPlayer::get_bus() const {
for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
if (AudioServer::get_singleton()->get_bus_name(i) == bus) {
return bus;
}
}
return "Master";
}
void VideoPlayer::_validate_property(PropertyInfo &p_property) const {
if (p_property.name == "bus") {
String options;
for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
if (i > 0)
options += ",";
String name = AudioServer::get_singleton()->get_bus_name(i);
options += name;
}
p_property.hint_string = options;
}
}
void VideoPlayer::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_stream", "stream"), &VideoPlayer::set_stream);
ClassDB::bind_method(D_METHOD("get_stream"), &VideoPlayer::get_stream);
ClassDB::bind_method(D_METHOD("play"), &VideoPlayer::play);
ClassDB::bind_method(D_METHOD("stop"), &VideoPlayer::stop);
ClassDB::bind_method(D_METHOD("is_playing"), &VideoPlayer::is_playing);
ClassDB::bind_method(D_METHOD("set_paused", "paused"), &VideoPlayer::set_paused);
ClassDB::bind_method(D_METHOD("is_paused"), &VideoPlayer::is_paused);
ClassDB::bind_method(D_METHOD("set_volume", "volume"), &VideoPlayer::set_volume);
ClassDB::bind_method(D_METHOD("get_volume"), &VideoPlayer::get_volume);
ClassDB::bind_method(D_METHOD("set_volume_db", "db"), &VideoPlayer::set_volume_db);
ClassDB::bind_method(D_METHOD("get_volume_db"), &VideoPlayer::get_volume_db);
ClassDB::bind_method(D_METHOD("set_audio_track", "track"), &VideoPlayer::set_audio_track);
ClassDB::bind_method(D_METHOD("get_audio_track"), &VideoPlayer::get_audio_track);
ClassDB::bind_method(D_METHOD("get_stream_name"), &VideoPlayer::get_stream_name);
ClassDB::bind_method(D_METHOD("set_stream_position", "position"), &VideoPlayer::set_stream_position);
ClassDB::bind_method(D_METHOD("get_stream_position"), &VideoPlayer::get_stream_position);
ClassDB::bind_method(D_METHOD("set_autoplay", "enabled"), &VideoPlayer::set_autoplay);
ClassDB::bind_method(D_METHOD("has_autoplay"), &VideoPlayer::has_autoplay);
ClassDB::bind_method(D_METHOD("set_expand", "enable"), &VideoPlayer::set_expand);
ClassDB::bind_method(D_METHOD("has_expand"), &VideoPlayer::has_expand);
ClassDB::bind_method(D_METHOD("set_buffering_msec", "msec"), &VideoPlayer::set_buffering_msec);
ClassDB::bind_method(D_METHOD("get_buffering_msec"), &VideoPlayer::get_buffering_msec);
ClassDB::bind_method(D_METHOD("set_bus", "bus"), &VideoPlayer::set_bus);
ClassDB::bind_method(D_METHOD("get_bus"), &VideoPlayer::get_bus);
ClassDB::bind_method(D_METHOD("get_video_texture"), &VideoPlayer::get_video_texture);
ADD_SIGNAL(MethodInfo("finished"));
ADD_PROPERTY(PropertyInfo(Variant::INT, "audio_track", PROPERTY_HINT_RANGE, "0,128,1"), "set_audio_track", "get_audio_track");
ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "stream", PROPERTY_HINT_RESOURCE_TYPE, "VideoStream"), "set_stream", "get_stream");
//ADD_PROPERTY( PropertyInfo(Variant::BOOL, "stream/loop"), "set_loop", "has_loop") ;
ADD_PROPERTY(PropertyInfo(Variant::REAL, "volume_db", PROPERTY_HINT_RANGE, "-80,24,0.01"), "set_volume_db", "get_volume_db");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "volume", PROPERTY_HINT_EXP_RANGE, "0,15,0.01", 0), "set_volume", "get_volume");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "autoplay"), "set_autoplay", "has_autoplay");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "paused"), "set_paused", "is_paused");
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "expand"), "set_expand", "has_expand");
ADD_PROPERTY(PropertyInfo(Variant::INT, "buffering_msec", PROPERTY_HINT_RANGE, "10,1000"), "set_buffering_msec", "get_buffering_msec");
ADD_PROPERTY(PropertyInfo(Variant::REAL, "stream_position", PROPERTY_HINT_RANGE, "0,1280000,0.1", 0), "set_stream_position", "get_stream_position");
ADD_PROPERTY(PropertyInfo(Variant::STRING, "bus", PROPERTY_HINT_ENUM, ""), "set_bus", "get_bus");
}
VideoPlayer::VideoPlayer() {
volume = 1;
loops = false;
paused = false;
autoplay = false;
expand = true;
audio_track = 0;
bus_index = 0;
buffering_ms = 500;
// internal_stream.player=this;
// stream_rid=AudioServer::get_singleton()->audio_stream_create(&internal_stream);
last_audio_time = 0;
wait_resampler = 0;
wait_resampler_limit = 2;
};
VideoPlayer::~VideoPlayer() {
// if (stream_rid.is_valid())
// AudioServer::get_singleton()->free(stream_rid);
resampler.clear(); //Not necessary here, but make in consistent with other "stream_player" classes
};
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