initial commit

esp32/scripts/build_opencv_for_esp32.sh

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+#!/bin/bash
+
+# This script builds the opencv static libraries for the ESP32 and then copies the library and headers files to the asked folder. It must be runned from the opencv repository root.
+
+# USAGE: ./build_opencv_for_esp32.sh <path-to-toolchain> <path-to-project>
+
+set -e
+
+# dir where the script is, no matter from where it is being called from
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"   
+
+# path to the cmake file containing the toolchain informations
+TOOLCHAIN_CMAKE_PATH=$HOME/esp/esp-idf/tools/cmake/toolchain-esp32.cmake
+
+# path where to copy the build libs and headers 
+LIB_INSTALL_PATH=$SCRIPTDIR/../lib
+
+# list of modules to compile
+OPENCV_MODULES_LIST=core,imgproc,imgcodecs
+
+echo "################################################################################"
+echo "######################## build_opencv_for_esp32 script #########################"
+echo "################################################################################"
+
+## get script arguments ###
+if [ -z "$1" ]
+  then
+    echo "Using default toolchain cmake file path: ${TOOLCHAIN_CMAKE_PATH}" 
+else 
+     TOOLCHAIN_PATH=$1
+     echo "Using toolchain cmake file path: ${TOOLCHAIN_CMAKE_PATH}"
+fi
+
+if [ -z "$2" ]
+  then
+    echo "Will be installed in default library install path: ${LIB_INSTALL_PATH}/opencv" 
+else 
+     LIB_INSTALL_PATH=$2
+     echo "Will be installed in user-defined library install path: ${LIB_INSTALL_PATH}/opencv"
+fi
+
+
+CMAKE_ARGS="-DCMAKE_BUILD_TYPE=Release -DESP32=ON -DBUILD_SHARED_LIBS=OFF -DCV_DISABLE_OPTIMIZATION=ON -DWITH_IPP=OFF -DWITH_TBB=OFF -DWITH_OPENMP=OFF -DWITH_PTHREADS_PF=OFF -DWITH_QUIRC=OFF -DWITH_1394=OFF -DWITH_CUDA=OFF -DWITH_OPENCL=OFF -DWITH_OPENCLAMDFFT=OFF -DWITH_OPENCLAMDBLAS=OFF -DWITH_VA_INTEL=OFF -DWITH_GSTREAMER=OFF -DWITH_GTK=OFF -DWITH_JASPER=OFF -DWITH_JPEG=OFF -DWITH_WEBP=OFF -DBUILD_ZLIB=ON -DBUILD_PNG=ON -DWITH_TIFF=OFF -DWITH_V4L=OFF -DWITH_ITT=OFF -DWITH_PROTOBUF=OFF -DWITH_IMGCODEC_HDR=OFF -DWITH_IMGCODEC_SUNRASTER=OFF -DWITH_IMGCODEC_PXM=OFF -DWITH_IMGCODEC_PFM=OFF -DBUILD_LIST=${OPENCV_MODULES_LIST} -DBUILD_JAVA=OFF -DBUILD_opencv_python=OFF -DBUILD_opencv_java=OFF -DBUILD_opencv_apps=OFF -DBUILD_PACKAGE=OFF -DBUILD_PERF_TESTS=OFF -DBUILD_TESTS=OFF -DCV_ENABLE_INTRINSICS=OFF -DCV_TRACE=OFF -DOPENCV_ENABLE_MEMALIGN=OFF -DCMAKE_TOOLCHAIN_FILE=${TOOLCHAIN_CMAKE_PATH}"
+
+
+### configure and build opencv ###
+cd $SCRIPTDIR/../../
+rm -rf build/ && mkdir -p build/ && cd build
+
+# configure with cmake
+echo "================================================================================"
+echo "Configuring with cmake ${CMAKE_ARGS} :"
+echo "================================================================================"
+cmake $CMAKE_ARGS ..
+read -p "Don't forget to check the cmake summary! Continue ? [y/N]"  prompt
+if [  "${prompt}" != "y" ]; then 
+    echo "aborted."
+	exit 1
+fi
+
+# fix of the generated file alloc.c 
+cp $SCRIPTDIR/resources/alloc_fix.cpp ./3rdparty/ade/ade-0.1.1f/sources/ade/source/alloc.cpp
+
+# compiling with all power!
+echo "================================================================================"
+echo "Compiling with make -j"
+echo "================================================================================"
+make -j
+
+### installing in output directory ###
+echo "================================================================================"
+echo "Installing in ${LIB_INSTALL_PATH}"
+echo "================================================================================"
+# copying opencv modules libs
+mkdir -p $LIB_INSTALL_PATH/opencv
+cp lib/* $LIB_INSTALL_PATH/opencv
+
+# copying 3rdparty libs
+mkdir -p $LIB_INSTALL_PATH/opencv/3rdparty
+cp 3rdparty/lib/* $LIB_INSTALL_PATH/opencv/3rdparty
+
+# copying headers
+mkdir -p $LIB_INSTALL_PATH/opencv/opencv2
+cp opencv2/* $LIB_INSTALL_PATH/opencv/opencv2
+cp ../include/opencv2/opencv.hpp $LIB_INSTALL_PATH/opencv/opencv2/
+
+
+IFS=',' read -r -a modules <<< "$OPENCV_MODULES_LIST"
+for elt in "${modules[@]}"
+do
+    echo "Module ${elt}"
+    cp -r "../modules/${elt}/include/opencv2" $LIB_INSTALL_PATH/opencv
+done
+
+echo "installation done."
+
+

esp32/scripts/install_esp32_toolchain.sh

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+#!/bin/bash
+
+# This script downloads the esp32 toolchain and compile it.
+
+# USAGE: ./install_esp32_toolchain.sh <path-to-install>
+# Default installation is in $HOME/esp/
+
+# Installation instructions from https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html
+
+set -e
+
+SCRIPTDIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"   # dir from where this script is run
+CROSSTOOLNGVERSION=2019r2
+DEFAULTINSTALLDIR=$HOME/esp/
+
+### install some dependencies ###
+sudo apt-get install -y git wget libncurses-dev flex bison gperf python python-pip python-setuptools python-serial python-click python-cryptography python-future python-pyparsing python-pyelftools ninja-build ccache libffi-dev libssl-dev
+
+sudo apt-get install -y gawk gperf grep gettext python python-dev automake bison flex texinfo help2man libtool libtool-bin make git
+
+
+## get and install esp-idf tools ###
+if [ -z "$1" ]
+  then
+    INSTALLDIR = $DEFAULTINSTALLDIR
+else 
+     INSTALLDIR = $1
+fi
+
+mkdir -p $INSTALLDIR && cd $INSTALLDIR
+git clone --recursive https://github.com/espressif/esp-idf.git
+
+cd esp-idf/
+export IDF_TOOLS_PATH=$HOME/esp/
+./install.sh
+export IDF_PATH=$INSTALLDIR/esp-idf
+. $INSTALLDIR/esp-idf/export.sh
+
+# after that, the path modifications can be added to the terminal configuration file so that the tools are available after reboot

esp32/scripts/resources/alloc_fix.cpp

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+// Copyright (C) 2018 Intel Corporation
+//
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+#include "ade/memory/alloc.hpp"
+
+#if defined(_WIN32) || defined(__ANDROID__) || defined(ANDROID) || defined(ESP32)
+#include <malloc.h>
+#else
+#include <algorithm>
+#include <stdlib.h>
+#endif
+
+#include "ade/util/math.hpp"
+#include "ade/util/assert.hpp"
+
+namespace ade
+{
+
+void* aligned_alloc(std::size_t size, std::size_t alignment)
+{
+    ADE_ASSERT(util::is_pow2(alignment));
+#if defined(_WIN32)
+    return _aligned_malloc(size, alignment);
+#elif defined(__ANDROID__) || defined(ANDROID) || defined(ESP32)
+    return memalign(alignment, size);
+#else
+    void* ret = nullptr;
+    auto res = posix_memalign(&ret, std::max(sizeof(void*), alignment), size);
+    (void)res;
+    return ret;
+#endif
+}
+
+void aligned_free(void* ptr)
+{
+#if defined(_WIN32)
+    return _aligned_free(ptr);
+#else
+    return free(ptr);
+#endif
+}
+
+}

esp32/scripts/resources/toolchain-esp32.cmake

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+set(CMAKE_SYSTEM_NAME Generic)
+
+set( ESP32 True )
+
+set(CMAKE_C_COMPILER xtensa-esp32-elf-gcc)
+set(CMAKE_CXX_COMPILER xtensa-esp32-elf-g++)
+set(CMAKE_ASM_COMPILER xtensa-esp32-elf-gcc)
+
+set(CMAKE_C_FLAGS "-mlongcalls -Wno-frame-address" CACHE STRING "C Compiler Base Flags")
+set(CMAKE_CXX_FLAGS "-mlongcalls -Wno-frame-address" CACHE STRING "C++ Compiler Base Flags")
+
+# Can be removed after gcc 5.2.0 support is removed (ref GCC_NOT_5_2_0)
+set(CMAKE_EXE_LINKER_FLAGS "-nostdlib" CACHE STRING "Linker Base Flags")