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godot/scene/gui/video_player.cpp

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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();
if (!expand) {
minimum_size_changed();
}
};
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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