510 lines
14 KiB
C++
510 lines
14 KiB
C++
/*************************************************************************/
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/* video_stream_webm.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_webm.h"
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#include "core/os/file_access.h"
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#include "core/os/os.h"
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#include "core/project_settings.h"
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#include "servers/audio_server.h"
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#include "thirdparty/misc/yuv2rgb.h"
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// libsimplewebm
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#include <OpusVorbisDecoder.hpp>
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#include <VPXDecoder.hpp>
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// libvpx
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#include <vpx/vpx_image.h>
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// libwebm
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#include <mkvparser/mkvparser.h>
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class MkvReader : public mkvparser::IMkvReader {
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public:
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MkvReader(const String &p_file) {
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file = FileAccess::open(p_file, FileAccess::READ);
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ERR_FAIL_COND_MSG(!file, "Failed loading resource: '" + p_file + "'.");
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}
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~MkvReader() {
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if (file)
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memdelete(file);
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}
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virtual int Read(long long pos, long len, unsigned char *buf) {
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if (file) {
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if (file->get_position() != (size_t)pos)
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file->seek(pos);
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if (file->get_buffer(buf, len) == len)
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return 0;
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}
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return -1;
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}
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virtual int Length(long long *total, long long *available) {
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if (file) {
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const size_t len = file->get_len();
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if (total)
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*total = len;
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if (available)
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*available = len;
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return 0;
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}
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return -1;
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}
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private:
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FileAccess *file;
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};
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/**/
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VideoStreamPlaybackWebm::VideoStreamPlaybackWebm() :
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audio_track(0),
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webm(NULL),
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video(NULL),
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audio(NULL),
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video_frames(NULL),
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audio_frame(NULL),
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video_frames_pos(0),
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video_frames_capacity(0),
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num_decoded_samples(0),
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samples_offset(-1),
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mix_callback(NULL),
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mix_udata(NULL),
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playing(false),
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paused(false),
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delay_compensation(0.0),
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time(0.0),
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video_frame_delay(0.0),
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video_pos(0.0),
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texture(memnew(ImageTexture)),
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pcm(NULL) {}
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VideoStreamPlaybackWebm::~VideoStreamPlaybackWebm() {
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delete_pointers();
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}
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bool VideoStreamPlaybackWebm::open_file(const String &p_file) {
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file_name = p_file;
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webm = memnew(WebMDemuxer(new MkvReader(file_name), 0, audio_track));
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if (webm->isOpen()) {
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video = memnew(VPXDecoder(*webm, OS::get_singleton()->get_processor_count()));
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if (video->isOpen()) {
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audio = memnew(OpusVorbisDecoder(*webm));
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if (audio->isOpen()) {
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audio_frame = memnew(WebMFrame);
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pcm = (float *)memalloc(sizeof(float) * audio->getBufferSamples() * webm->getChannels());
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} else {
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memdelete(audio);
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audio = NULL;
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}
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frame_data.resize((webm->getWidth() * webm->getHeight()) << 2);
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texture->create(webm->getWidth(), webm->getHeight(), Image::FORMAT_RGBA8, Texture::FLAG_FILTER | Texture::FLAG_VIDEO_SURFACE);
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return true;
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}
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memdelete(video);
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video = NULL;
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}
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memdelete(webm);
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webm = NULL;
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return false;
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}
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void VideoStreamPlaybackWebm::stop() {
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if (playing) {
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delete_pointers();
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pcm = NULL;
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audio_frame = NULL;
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video_frames = NULL;
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video = NULL;
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audio = NULL;
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open_file(file_name); //Should not fail here...
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video_frames_capacity = video_frames_pos = 0;
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num_decoded_samples = 0;
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samples_offset = -1;
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video_frame_delay = video_pos = 0.0;
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}
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time = 0.0;
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playing = false;
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}
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void VideoStreamPlaybackWebm::play() {
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stop();
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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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playing = true;
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}
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bool VideoStreamPlaybackWebm::is_playing() const {
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return playing;
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}
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void VideoStreamPlaybackWebm::set_paused(bool p_paused) {
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paused = p_paused;
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}
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bool VideoStreamPlaybackWebm::is_paused() const {
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return paused;
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}
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void VideoStreamPlaybackWebm::set_loop(bool p_enable) {
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//Empty
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}
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bool VideoStreamPlaybackWebm::has_loop() const {
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return false;
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}
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float VideoStreamPlaybackWebm::get_length() const {
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if (webm)
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return webm->getLength();
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return 0.0f;
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}
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float VideoStreamPlaybackWebm::get_playback_position() const {
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return video_pos;
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}
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void VideoStreamPlaybackWebm::seek(float p_time) {
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//Not implemented
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}
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void VideoStreamPlaybackWebm::set_audio_track(int p_idx) {
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audio_track = p_idx;
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}
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Ref<Texture> VideoStreamPlaybackWebm::get_texture() const {
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return texture;
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}
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void VideoStreamPlaybackWebm::update(float p_delta) {
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if ((!playing || paused) || !video)
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return;
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time += p_delta;
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if (time < video_pos) {
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return;
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}
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bool audio_buffer_full = false;
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if (samples_offset > -1) {
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//Mix remaining samples
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const int to_read = num_decoded_samples - samples_offset;
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const int mixed = mix_callback(mix_udata, pcm + samples_offset * webm->getChannels(), to_read);
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if (mixed != to_read) {
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samples_offset += mixed;
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audio_buffer_full = true;
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} else {
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samples_offset = -1;
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}
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}
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const bool hasAudio = (audio && mix_callback);
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while ((hasAudio && !audio_buffer_full && !has_enough_video_frames()) ||
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(!hasAudio && video_frames_pos == 0)) {
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if (hasAudio && !audio_buffer_full && audio_frame->isValid() &&
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audio->getPCMF(*audio_frame, pcm, num_decoded_samples) && num_decoded_samples > 0) {
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const int mixed = mix_callback(mix_udata, pcm, num_decoded_samples);
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if (mixed != num_decoded_samples) {
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samples_offset = mixed;
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audio_buffer_full = true;
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}
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}
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WebMFrame *video_frame;
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if (video_frames_pos >= video_frames_capacity) {
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WebMFrame **video_frames_new = (WebMFrame **)memrealloc(video_frames, ++video_frames_capacity * sizeof(void *));
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ERR_FAIL_COND(!video_frames_new); //Out of memory
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(video_frames = video_frames_new)[video_frames_capacity - 1] = memnew(WebMFrame);
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}
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video_frame = video_frames[video_frames_pos];
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if (!webm->readFrame(video_frame, audio_frame)) //This will invalidate frames
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break; //Can't demux, EOS?
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if (video_frame->isValid())
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++video_frames_pos;
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};
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bool video_frame_done = false;
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while (video_frames_pos > 0 && !video_frame_done) {
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WebMFrame *video_frame = video_frames[0];
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// It seems VPXDecoder::decode has to be executed even though we might skip this frame
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if (video->decode(*video_frame)) {
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VPXDecoder::IMAGE_ERROR err;
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VPXDecoder::Image image;
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if (should_process(*video_frame)) {
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if ((err = video->getImage(image)) != VPXDecoder::NO_FRAME) {
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if (err == VPXDecoder::NO_ERROR && image.w == webm->getWidth() && image.h == webm->getHeight()) {
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PoolVector<uint8_t>::Write w = frame_data.write();
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bool converted = false;
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if (image.chromaShiftW == 0 && image.chromaShiftH == 0 && image.cs == VPX_CS_SRGB) {
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uint8_t *wp = w.ptr();
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unsigned char *rRow = image.planes[2];
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unsigned char *gRow = image.planes[0];
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unsigned char *bRow = image.planes[1];
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for (int i = 0; i < image.h; i++) {
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for (int j = 0; j < image.w; j++) {
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*wp++ = rRow[j];
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*wp++ = gRow[j];
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*wp++ = bRow[j];
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*wp++ = 255;
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}
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rRow += image.linesize[2];
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gRow += image.linesize[0];
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bRow += image.linesize[1];
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}
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converted = true;
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} else if (image.chromaShiftW == 1 && image.chromaShiftH == 1) {
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yuv420_2_rgb8888(w.ptr(), image.planes[0], image.planes[1], image.planes[2], image.w, image.h, image.linesize[0], image.linesize[1], image.w << 2);
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//libyuv::I420ToARGB(image.planes[0], image.linesize[0], image.planes[2], image.linesize[2], image.planes[1], image.linesize[1], w.ptr(), image.w << 2, image.w, image.h);
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converted = true;
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} else if (image.chromaShiftW == 1 && image.chromaShiftH == 0) {
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yuv422_2_rgb8888(w.ptr(), image.planes[0], image.planes[1], image.planes[2], image.w, image.h, image.linesize[0], image.linesize[1], image.w << 2);
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//libyuv::I422ToARGB(image.planes[0], image.linesize[0], image.planes[2], image.linesize[2], image.planes[1], image.linesize[1], w.ptr(), image.w << 2, image.w, image.h);
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converted = true;
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} else if (image.chromaShiftW == 0 && image.chromaShiftH == 0) {
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yuv444_2_rgb8888(w.ptr(), image.planes[0], image.planes[1], image.planes[2], image.w, image.h, image.linesize[0], image.linesize[1], image.w << 2);
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//libyuv::I444ToARGB(image.planes[0], image.linesize[0], image.planes[2], image.linesize[2], image.planes[1], image.linesize[1], w.ptr(), image.w << 2, image.w, image.h);
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converted = true;
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} else if (image.chromaShiftW == 2 && image.chromaShiftH == 0) {
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//libyuv::I411ToARGB(image.planes[0], image.linesize[0], image.planes[2], image.linesize[2] image.planes[1], image.linesize[1], w.ptr(), image.w << 2, image.w, image.h);
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//converted = true;
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}
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if (converted) {
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Ref<Image> img = memnew(Image(image.w, image.h, 0, Image::FORMAT_RGBA8, frame_data));
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texture->set_data(img); //Zero copy send to visual server
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video_frame_done = true;
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}
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}
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}
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}
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}
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video_pos = video_frame->time;
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memmove(video_frames, video_frames + 1, (--video_frames_pos) * sizeof(void *));
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video_frames[video_frames_pos] = video_frame;
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}
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if (video_frames_pos == 0 && webm->isEOS())
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stop();
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}
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void VideoStreamPlaybackWebm::set_mix_callback(VideoStreamPlayback::AudioMixCallback p_callback, void *p_userdata) {
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mix_callback = p_callback;
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mix_udata = p_userdata;
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}
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int VideoStreamPlaybackWebm::get_channels() const {
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if (audio)
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return webm->getChannels();
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return 0;
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}
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int VideoStreamPlaybackWebm::get_mix_rate() const {
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if (audio)
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return webm->getSampleRate();
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return 0;
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}
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inline bool VideoStreamPlaybackWebm::has_enough_video_frames() const {
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if (video_frames_pos > 0) {
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const double audio_delay = AudioServer::get_singleton()->get_output_latency();
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const double video_time = video_frames[video_frames_pos - 1]->time;
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return video_time >= time + audio_delay + delay_compensation;
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}
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return false;
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}
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bool VideoStreamPlaybackWebm::should_process(WebMFrame &video_frame) {
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const double audio_delay = AudioServer::get_singleton()->get_output_latency();
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return video_frame.time >= time + audio_delay + delay_compensation;
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}
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void VideoStreamPlaybackWebm::delete_pointers() {
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if (pcm)
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memfree(pcm);
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if (audio_frame)
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memdelete(audio_frame);
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if (video_frames) {
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for (int i = 0; i < video_frames_capacity; ++i)
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memdelete(video_frames[i]);
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memfree(video_frames);
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}
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if (video)
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memdelete(video);
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if (audio)
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memdelete(audio);
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if (webm)
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memdelete(webm);
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}
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/**/
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VideoStreamWebm::VideoStreamWebm() :
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audio_track(0) {}
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Ref<VideoStreamPlayback> VideoStreamWebm::instance_playback() {
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Ref<VideoStreamPlaybackWebm> pb = memnew(VideoStreamPlaybackWebm);
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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 NULL;
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}
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void VideoStreamWebm::set_file(const String &p_file) {
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file = p_file;
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}
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String VideoStreamWebm::get_file() {
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return file;
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}
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void VideoStreamWebm::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_file", "file"), &VideoStreamWebm::set_file);
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ClassDB::bind_method(D_METHOD("get_file"), &VideoStreamWebm::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 VideoStreamWebm::set_audio_track(int p_track) {
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audio_track = p_track;
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}
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////////////
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RES ResourceFormatLoaderWebm::load(const String &p_path, const String &p_original_path, Error *r_error) {
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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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VideoStreamWebm *stream = memnew(VideoStreamWebm);
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stream->set_file(p_path);
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Ref<VideoStreamWebm> webm_stream = Ref<VideoStreamWebm>(stream);
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if (r_error) {
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*r_error = OK;
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}
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f->close();
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memdelete(f);
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return webm_stream;
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}
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void ResourceFormatLoaderWebm::get_recognized_extensions(List<String> *p_extensions) const {
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p_extensions->push_back("webm");
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}
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bool ResourceFormatLoaderWebm::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 ResourceFormatLoaderWebm::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 (el == "webm")
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return "VideoStreamWebm";
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return "";
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}
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