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virtualx-engine/servers/movie_writer/movie_writer_mjpeg.cpp
Rémi Verschelde d95794ec8a
One Copyright Update to rule them all 
As many open source projects have started doing it, we're removing the
current year from the copyright notice, so that we don't need to bump
it every year.

It seems like only the first year of publication is technically
relevant for copyright notices, and even that seems to be something
that many companies stopped listing altogether (in a version controlled
codebase, the commits are a much better source of date of publication
than a hardcoded copyright statement).

We also now list Godot Engine contributors first as we're collectively
the current maintainers of the project, and we clarify that the
"exclusive" copyright of the co-founders covers the timespan before
opensourcing (their further contributions are included as part of Godot
Engine contributors).

Also fixed "cf." Frenchism - it's meant as "refer to / see".
2023-01-05 13:25:55 +01:00

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/**************************************************************************/
/* movie_writer_mjpeg.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* 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 "movie_writer_mjpeg.h"
#include "core/config/project_settings.h"
uint32_t MovieWriterMJPEG::get_audio_mix_rate() const {
return mix_rate;
}
AudioServer::SpeakerMode MovieWriterMJPEG::get_audio_speaker_mode() const {
return speaker_mode;
}
bool MovieWriterMJPEG::handles_file(const String &p_path) const {
return p_path.get_extension().to_lower() == "avi";
}
void MovieWriterMJPEG::get_supported_extensions(List<String> *r_extensions) const {
r_extensions->push_back("avi");
}
Error MovieWriterMJPEG::write_begin(const Size2i &p_movie_size, uint32_t p_fps, const String &p_base_path) {
// Quick & Dirty MJPEG Code based on - https://docs.microsoft.com/en-us/windows/win32/directshow/avi-riff-file-reference
base_path = p_base_path.get_basename();
if (base_path.is_relative_path()) {
base_path = "res://" + base_path;
}
base_path += ".avi";
f = FileAccess::open(base_path, FileAccess::WRITE_READ);
fps = p_fps;
ERR_FAIL_COND_V(f.is_null(), ERR_CANT_OPEN);
f->store_buffer((const uint8_t *)"RIFF", 4);
f->store_32(0); // Total length (update later)
f->store_buffer((const uint8_t *)"AVI ", 4);
f->store_buffer((const uint8_t *)"LIST", 4);
f->store_32(300); // 4 + 4 + 4 + 56 + 4 + 4 + 132 + 4 + 4 + 84
f->store_buffer((const uint8_t *)"hdrl", 4);
f->store_buffer((const uint8_t *)"avih", 4);
f->store_32(56);
f->store_32(1000000 / p_fps); // Microsecs per frame.
f->store_32(7000); // Max bytes per second
f->store_32(0); // Padding Granularity
f->store_32(16);
total_frames_ofs = f->get_position();
f->store_32(0); // Total frames (update later)
f->store_32(0); // Initial frames
f->store_32(1); // Streams
f->store_32(0); // Suggested buffer size
f->store_32(p_movie_size.width); // Movie Width
f->store_32(p_movie_size.height); // Movie Height
for (uint32_t i = 0; i < 4; i++) {
f->store_32(0); // Reserved.
}
f->store_buffer((const uint8_t *)"LIST", 4);
f->store_32(132); // 4 + 4 + 4 + 48 + 4 + 4 + 40 + 4 + 4 + 16
f->store_buffer((const uint8_t *)"strl", 4);
f->store_buffer((const uint8_t *)"strh", 4);
f->store_32(48);
f->store_buffer((const uint8_t *)"vids", 4);
f->store_buffer((const uint8_t *)"MJPG", 4);
f->store_32(0); // Flags
f->store_16(0); // Priority
f->store_16(0); // Language
f->store_32(0); // Initial Frames
f->store_32(1); // Scale
f->store_32(p_fps); // FPS
f->store_32(0); // Start
total_frames_ofs2 = f->get_position();
f->store_32(0); // Number of frames (to be updated later)
f->store_32(0); // Suggested Buffer Size
f->store_32(0); // Quality
f->store_32(0); // Sample Size
f->store_buffer((const uint8_t *)"strf", 4);
f->store_32(40); // Size.
f->store_32(40); // Size.
f->store_32(p_movie_size.width); // Width
f->store_32(p_movie_size.height); // Width
f->store_16(1); // Planes
f->store_16(24); // Bitcount
f->store_buffer((const uint8_t *)"MJPG", 4); // Compression
f->store_32(((p_movie_size.width * 24 / 8 + 3) & 0xFFFFFFFC) * p_movie_size.height); // SizeImage
f->store_32(0); // XPelsXMeter
f->store_32(0); // YPelsXMeter
f->store_32(0); // ClrUsed
f->store_32(0); // ClrImportant
f->store_buffer((const uint8_t *)"LIST", 4);
f->store_32(16);
f->store_buffer((const uint8_t *)"odml", 4);
f->store_buffer((const uint8_t *)"dmlh", 4);
f->store_32(4); // sizes
total_frames_ofs3 = f->get_position();
f->store_32(0); // Number of frames (to be updated later)
// Audio //
const uint32_t bit_depth = 32;
uint32_t channels = 2;
switch (speaker_mode) {
case AudioServer::SPEAKER_MODE_STEREO:
channels = 2;
break;
case AudioServer::SPEAKER_SURROUND_31:
channels = 4;
break;
case AudioServer::SPEAKER_SURROUND_51:
channels = 6;
break;
case AudioServer::SPEAKER_SURROUND_71:
channels = 8;
break;
}
uint32_t blockalign = bit_depth / 8 * channels;
f->store_buffer((const uint8_t *)"LIST", 4);
f->store_32(84); // 4 + 4 + 4 + 48 + 4 + 4 + 16
f->store_buffer((const uint8_t *)"strl", 4);
f->store_buffer((const uint8_t *)"strh", 4);
f->store_32(48);
f->store_buffer((const uint8_t *)"auds", 4);
f->store_32(0); // Handler
f->store_32(0); // Flags
f->store_16(0); // Priority
f->store_16(0); // Language
f->store_32(0); // Initial Frames
f->store_32(blockalign); // Scale
f->store_32(mix_rate * blockalign); // mix rate
f->store_32(0); // Start
total_audio_frames_ofs4 = f->get_position();
f->store_32(0); // Number of frames (to be updated later)
f->store_32(12288); // Suggested Buffer Size
f->store_32(0xFFFFFFFF); // Quality
f->store_32(blockalign); // Block Align to 32 bits
audio_block_size = (mix_rate / fps) * blockalign;
f->store_buffer((const uint8_t *)"strf", 4);
f->store_32(16); // Standard format, no extra fields
f->store_16(1); // Compression code, standard PCM
f->store_16(channels);
f->store_32(mix_rate); // Samples (frames) / Sec
f->store_32(mix_rate * blockalign); // Bytes / sec
f->store_16(blockalign); // Bytes / sec
f->store_16(bit_depth); // Bytes / sec
f->store_buffer((const uint8_t *)"LIST", 4);
movi_data_ofs = f->get_position();
f->store_32(0); // Number of frames (to be updated later)
f->store_buffer((const uint8_t *)"movi", 4);
return OK;
}
Error MovieWriterMJPEG::write_frame(const Ref<Image> &p_image, const int32_t *p_audio_data) {
ERR_FAIL_COND_V(!f.is_valid(), ERR_UNCONFIGURED);
Vector<uint8_t> jpg_buffer = p_image->save_jpg_to_buffer(quality);
uint32_t s = jpg_buffer.size();
f->store_buffer((const uint8_t *)"00db", 4); // Stream 0, Video
f->store_32(jpg_buffer.size()); // sizes
f->store_buffer(jpg_buffer.ptr(), jpg_buffer.size());
if (jpg_buffer.size() & 1) {
f->store_8(0);
s++;
}
jpg_frame_sizes.push_back(s);
f->store_buffer((const uint8_t *)"01wb", 4); // Stream 1, Audio.
f->store_32(audio_block_size);
f->store_buffer((const uint8_t *)p_audio_data, audio_block_size);
frame_count++;
return OK;
}
void MovieWriterMJPEG::write_end() {
if (f.is_valid()) {
// Finalize the file (frame indices)
f->store_buffer((const uint8_t *)"idx1", 4);
f->store_32(8 * 4 * frame_count);
uint32_t ofs = 4;
uint32_t all_data_size = 0;
for (uint32_t i = 0; i < frame_count; i++) {
f->store_buffer((const uint8_t *)"00db", 4);
f->store_32(16); // AVI_KEYFRAME
f->store_32(ofs);
f->store_32(jpg_frame_sizes[i]);
ofs += jpg_frame_sizes[i] + 8;
f->store_buffer((const uint8_t *)"01wb", 4);
f->store_32(16); // AVI_KEYFRAME
f->store_32(ofs);
f->store_32(audio_block_size);
ofs += audio_block_size + 8;
all_data_size += jpg_frame_sizes[i] + audio_block_size;
}
uint32_t file_size = f->get_position();
f->seek(4);
f->store_32(file_size - 78);
f->seek(total_frames_ofs);
f->store_32(frame_count);
f->seek(total_frames_ofs2);
f->store_32(frame_count);
f->seek(total_frames_ofs3);
f->store_32(frame_count);
f->seek(total_audio_frames_ofs4);
f->store_32(frame_count * mix_rate / fps);
f->seek(movi_data_ofs);
f->store_32(all_data_size + 4 + 16 * frame_count);
f.unref();
}
}
MovieWriterMJPEG::MovieWriterMJPEG() {
mix_rate = GLOBAL_GET("editor/movie_writer/mix_rate");
speaker_mode = AudioServer::SpeakerMode(int(GLOBAL_GET("editor/movie_writer/speaker_mode")));
quality = GLOBAL_GET("editor/movie_writer/mjpeg_quality");
}
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