mirror of https://github.com/godotengine/godot
266 lines
11 KiB
C++
266 lines
11 KiB
C++
/**************************************************************************/
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/* buffer_decoder.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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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 "buffer_decoder.h"
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#include "servers/camera/camera_feed.h"
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#include <linux/videodev2.h>
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BufferDecoder::BufferDecoder(CameraFeed *p_camera_feed) {
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camera_feed = p_camera_feed;
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width = camera_feed->get_format().width;
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height = camera_feed->get_format().height;
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image.instantiate();
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}
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AbstractYuyvBufferDecoder::AbstractYuyvBufferDecoder(CameraFeed *p_camera_feed) :
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BufferDecoder(p_camera_feed) {
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switch (camera_feed->get_format().pixel_format) {
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case V4L2_PIX_FMT_YYUV:
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component_indexes = new int[4]{ 0, 1, 2, 3 };
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break;
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case V4L2_PIX_FMT_YVYU:
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component_indexes = new int[4]{ 0, 2, 3, 1 };
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break;
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case V4L2_PIX_FMT_UYVY:
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component_indexes = new int[4]{ 1, 3, 0, 2 };
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break;
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case V4L2_PIX_FMT_VYUY:
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component_indexes = new int[4]{ 1, 3, 2, 0 };
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break;
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default:
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component_indexes = new int[4]{ 0, 2, 1, 3 };
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}
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}
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AbstractYuyvBufferDecoder::~AbstractYuyvBufferDecoder() {
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delete[] component_indexes;
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}
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SeparateYuyvBufferDecoder::SeparateYuyvBufferDecoder(CameraFeed *p_camera_feed) :
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AbstractYuyvBufferDecoder(p_camera_feed) {
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y_image_data.resize(width * height);
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cbcr_image_data.resize(width * height);
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y_image.instantiate();
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cbcr_image.instantiate();
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}
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void SeparateYuyvBufferDecoder::decode(StreamingBuffer p_buffer) {
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uint8_t *y_dst = (uint8_t *)y_image_data.ptrw();
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uint8_t *uv_dst = (uint8_t *)cbcr_image_data.ptrw();
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uint8_t *src = (uint8_t *)p_buffer.start;
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uint8_t *y0_src = src + component_indexes[0];
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uint8_t *y1_src = src + component_indexes[1];
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uint8_t *u_src = src + component_indexes[2];
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uint8_t *v_src = src + component_indexes[3];
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for (int i = 0; i < width * height; i += 2) {
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*y_dst++ = *y0_src;
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*y_dst++ = *y1_src;
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*uv_dst++ = *u_src;
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*uv_dst++ = *v_src;
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y0_src += 4;
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y1_src += 4;
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u_src += 4;
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v_src += 4;
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}
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if (y_image.is_valid()) {
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y_image->set_data(width, height, false, Image::FORMAT_L8, y_image_data);
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} else {
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y_image.instantiate(width, height, false, Image::FORMAT_RGB8, y_image_data);
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}
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if (cbcr_image.is_valid()) {
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cbcr_image->set_data(width, height, false, Image::FORMAT_L8, cbcr_image_data);
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} else {
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cbcr_image.instantiate(width, height, false, Image::FORMAT_RGB8, cbcr_image_data);
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}
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camera_feed->set_ycbcr_images(y_image, cbcr_image);
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}
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YuyvToGrayscaleBufferDecoder::YuyvToGrayscaleBufferDecoder(CameraFeed *p_camera_feed) :
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AbstractYuyvBufferDecoder(p_camera_feed) {
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image_data.resize(width * height);
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}
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void YuyvToGrayscaleBufferDecoder::decode(StreamingBuffer p_buffer) {
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uint8_t *dst = (uint8_t *)image_data.ptrw();
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uint8_t *src = (uint8_t *)p_buffer.start;
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uint8_t *y0_src = src + component_indexes[0];
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uint8_t *y1_src = src + component_indexes[1];
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for (int i = 0; i < width * height; i += 2) {
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*dst++ = *y0_src;
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*dst++ = *y1_src;
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y0_src += 4;
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y1_src += 4;
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}
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if (image.is_valid()) {
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image->set_data(width, height, false, Image::FORMAT_L8, image_data);
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} else {
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image.instantiate(width, height, false, Image::FORMAT_RGB8, image_data);
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}
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camera_feed->set_rgb_image(image);
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}
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YuyvToRgbBufferDecoder::YuyvToRgbBufferDecoder(CameraFeed *p_camera_feed) :
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AbstractYuyvBufferDecoder(p_camera_feed) {
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image_data.resize(width * height * 3);
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}
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void YuyvToRgbBufferDecoder::decode(StreamingBuffer p_buffer) {
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uint8_t *src = (uint8_t *)p_buffer.start;
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uint8_t *y0_src = src + component_indexes[0];
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uint8_t *y1_src = src + component_indexes[1];
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uint8_t *u_src = src + component_indexes[2];
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uint8_t *v_src = src + component_indexes[3];
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uint8_t *dst = (uint8_t *)image_data.ptrw();
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for (int i = 0; i < width * height; i += 2) {
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int u = *u_src;
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int v = *v_src;
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int u1 = (((u - 128) << 7) + (u - 128)) >> 6;
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int rg = (((u - 128) << 1) + (u - 128) + ((v - 128) << 2) + ((v - 128) << 1)) >> 3;
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int v1 = (((v - 128) << 1) + (v - 128)) >> 1;
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*dst++ = CLAMP(*y0_src + v1, 0, 255);
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*dst++ = CLAMP(*y0_src - rg, 0, 255);
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*dst++ = CLAMP(*y0_src + u1, 0, 255);
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*dst++ = CLAMP(*y1_src + v1, 0, 255);
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*dst++ = CLAMP(*y1_src - rg, 0, 255);
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*dst++ = CLAMP(*y1_src + u1, 0, 255);
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y0_src += 4;
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y1_src += 4;
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u_src += 4;
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v_src += 4;
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}
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if (image.is_valid()) {
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image->set_data(width, height, false, Image::FORMAT_RGB8, image_data);
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} else {
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image.instantiate(width, height, false, Image::FORMAT_RGB8, image_data);
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}
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camera_feed->set_rgb_image(image);
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}
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CopyBufferDecoder::CopyBufferDecoder(CameraFeed *p_camera_feed, bool p_rgba) :
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BufferDecoder(p_camera_feed) {
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rgba = p_rgba;
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image_data.resize(width * height * (rgba ? 4 : 2));
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}
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void CopyBufferDecoder::decode(StreamingBuffer p_buffer) {
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uint8_t *dst = (uint8_t *)image_data.ptrw();
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memcpy(dst, p_buffer.start, p_buffer.length);
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if (image.is_valid()) {
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image->set_data(width, height, false, rgba ? Image::FORMAT_RGBA8 : Image::FORMAT_LA8, image_data);
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} else {
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image.instantiate(width, height, false, rgba ? Image::FORMAT_RGBA8 : Image::FORMAT_LA8, image_data);
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}
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camera_feed->set_rgb_image(image);
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}
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JpegBufferDecoder::JpegBufferDecoder(CameraFeed *p_camera_feed) :
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BufferDecoder(p_camera_feed) {
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}
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static const uint8_t huffman_table[] = {
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// Huffman table
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0xff, 0xc4, 0x01, 0xa2, 0x00, 0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a,
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0x0b, 0x01, 0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x10, 0x00,
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0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03, 0x05, 0x05, 0x04, 0x04, 0x00, 0x00, 0x01, 0x7d, 0x01,
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0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22,
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0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08, 0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24,
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0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28, 0x29,
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0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a,
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0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
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0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a,
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0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8,
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0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6,
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0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2, 0xe3,
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0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
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0xfa, 0x11, 0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04, 0x07, 0x05, 0x04, 0x04, 0x00, 0x01,
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0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07,
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0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91, 0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33,
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0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19,
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0x1a, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46,
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0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x63, 0x64, 0x65, 0x66,
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0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85,
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0x86, 0x87, 0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3,
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0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba,
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0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8,
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0xd9, 0xda, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6,
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0xf7, 0xf8, 0xf9, 0xfa
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};
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inline int find_byte_sequence(uint8_t *buffer, int buffer_size, uint8_t a, uint8_t b) {
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for (int i = 0; i < buffer_size - 1; i++) {
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if (buffer[i] == a && buffer[i + 1] == b) {
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return i;
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}
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}
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return -1;
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}
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void JpegBufferDecoder::decode(StreamingBuffer p_buffer) {
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image_data.resize(p_buffer.length);
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uint8_t *dst = (uint8_t *)image_data.ptrw();
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// search for Start of Frame (SOF0) marker
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int header_end_index = find_byte_sequence((uint8_t *)p_buffer.start, p_buffer.length, 0xff, 0xc0);
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int huff_index = find_byte_sequence((uint8_t *)p_buffer.start, header_end_index, huffman_table[0], huffman_table[1]);
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if (huff_index == -1) {
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// inject default huffman table before the header end index
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image_data.resize(p_buffer.length + sizeof(huffman_table));
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memcpy(dst, p_buffer.start, header_end_index);
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memcpy(dst + header_end_index, huffman_table, sizeof(huffman_table));
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memcpy(dst + header_end_index + sizeof(huffman_table), (uint8_t *)p_buffer.start + header_end_index, p_buffer.length - header_end_index);
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} else {
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memcpy(dst, p_buffer.start, p_buffer.length);
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}
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if (image->load_jpg_from_buffer(image_data) == OK) {
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camera_feed->set_rgb_image(image);
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}
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}
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