3rdparty: Move libchdr in-tree

Based on 54bfb87 with modifications from DuckStation.

.gitmodules

@@ -7,9 +7,6 @@
 [submodule "3rdparty/fmt/fmt"]
 	path = 3rdparty/fmt/fmt
 	url = https://github.com/fmtlib/fmt.git
-[submodule "3rdparty/libchdr/libchdr"]
-	path = 3rdparty/libchdr/libchdr
-	url = https://github.com/rtissera/libchdr.git
 [submodule "3rdparty/wil"]
 	path = 3rdparty/wil
 	url = https://github.com/microsoft/wil.git

3rdparty/libchdr/CMakeLists.txt

@@ -1,11 +1,19 @@
-add_library(chdr-static STATIC
-  libchdr/src/libchdr_bitstream.c
-  libchdr/src/libchdr_cdrom.c
-  libchdr/src/libchdr_chd.c
-  libchdr/src/libchdr_flac.c
-  libchdr/src/libchdr_huffman.c
+add_library(libchdr
+	include/dr_libs/dr_flac.h
+	include/libchdr/bitstream.h
+	include/libchdr/cdrom.h
+	include/libchdr/chd.h
+	include/libchdr/chdconfig.h
+	include/libchdr/coretypes.h
+	include/libchdr/flac.h
+	include/libchdr/huffman.h
+	src/libchdr_bitstream.c
+	src/libchdr_cdrom.c
+	src/libchdr_chd.c
+	src/libchdr_flac.c
+	src/libchdr_huffman.c
 )
 
-target_include_directories(chdr-static PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/libchdr/include")
-target_link_libraries(chdr-static PRIVATE ZLIB::ZLIB LZMA::LZMA)
-target_compile_options(chdr-static PRIVATE "-w")
+target_include_directories(libchdr PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/include")
+target_link_libraries(libchdr PRIVATE ZLIB::ZLIB LZMA::LZMA)
+

3rdparty/libchdr/LICENSE.txt

@@ -0,0 +1,24 @@
+Copyright Romain Tisserand
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+    * Neither the name of the <organization> nor the
+      names of its contributors may be used to endorse or promote products
+      derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

3rdparty/libchdr/README.md

@@ -0,0 +1,7 @@
+# libchdr
+
+libchdr is a standalone library for reading MAME's CHDv1-v5 formats.
+
+The code is based off of MAME's old C codebase which read up to CHDv4 with OS-dependent features removed, and CHDv5 support backported from MAME's current C++ codebase.
+
+libchdr is licensed under the BSD 3-Clause (see [LICENSE.txt](LICENSE.txt)) and uses third party libraries that are each distributed under their own terms (see each library's license in [deps/](deps/)).