Merge pull request #2 from yochy4671/master

update submodules

Makefile

@@ -107,7 +107,7 @@ endif
 ARCHIVE ?= $(PROJECT_BASENAME).$(TARGET_ARCH).7z
 
 LIBDAV1D_LIBS += external/dav1d/$(BUILD_DIR_EXTERNAL_NAME)/src/libdav1d.a
-LIBAVIF_SOURCES += external/libavif/src/codec_dav1d.c external/libavif/src/alpha.c external/libavif/src/avif.c external/libavif/src/colr.c external/libavif/src/io.c external/libavif/src/mem.c external/libavif/src/obu.c external/libavif/src/rawdata.c external/libavif/src/read.c external/libavif/src/reformat.c external/libavif/src/reformat_libyuv.c external/libavif/src/stream.c external/libavif/src/utils.c external/libavif/src/write.c
+LIBAVIF_SOURCES += external/libavif/src/codec_dav1d.c external/libavif/src/alpha.c external/libavif/src/avif.c external/libavif/src/colr.c external/libavif/src/io.c external/libavif/src/mem.c external/libavif/src/obu.c external/libavif/src/rawdata.c external/libavif/src/read.c external/libavif/src/reformat.c external/libavif/src/reformat_libyuv.c external/libavif/src/stream.c external/libavif/src/utils.c external/libavif/src/write.c external/libavif/src/diag.c external/libavif/src/scale.c
 SOURCES := extractor.c spi00in.c ifavif.rc $(LIBAVIF_SOURCES)
 OBJECTS := $(SOURCES:.c=$(OBJECT_EXTENSION))
 OBJECTS := $(OBJECTS:.cpp=$(OBJECT_EXTENSION))

README.md

@@ -12,6 +12,13 @@ The following binaries are available:
 * [Win32 (ARM 32-bit Clang)](https://github.com/uyjulian/ifavif/releases/latest/download/ifavif.arm32.clang.7z)  
 * [Win32 (ARM 64-bit Clang)](https://github.com/uyjulian/ifavif/releases/latest/download/ifavif.arm64.clang.7z)  
 
+## Preparing the environment
+
+* Ubuntu
+```
+$ sudo apt install mingw-w64 meson nasm
+```
+
 ## Building
 
 After cloning submodules and preparing the environment, a simple invocation of `make` will generate `ifavif.spi`.