From d2c6b4041adc2a69997b7c22662dc3a86d61fb0e Mon Sep 17 00:00:00 2001
From: Berkus Decker <berkus@madfire.net>
Date: Sun, 3 Dec 2017 19:24:34 +0200
Subject: [PATCH] Switch to FindOpus.cmake

---
 CMakeLists.txt          |  7 +------
 Telegram/CMakeLists.txt |  2 +-
 modules/FindOpus.cmake  | 13 +++++++++++++
 3 files changed, 15 insertions(+), 7 deletions(-)
 create mode 100644 modules/FindOpus.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e6d81a17f..c1fed3edc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,9 +29,7 @@ find_package(ZLIB REQUIRED)
 find_package(OpenSSL REQUIRED)
 find_package(FFmpeg REQUIRED)
 find_package(ZLIB REQUIRED)
-#@todo Turn into find_package(Opus REQUIRED)
-find_library(OPUS_LIB opus)
-find_path(OPUS_INCLUDE_DIR opus/opus.h)
+find_package(Opus REQUIRED)
 
 if (NOT SWSCALE_FOUND)
     message(FATAL_ERROR "FFmpeg swscale is required")
@@ -39,8 +37,5 @@ endif()
 if (NOT SWRESAMPLE_FOUND)
     message(FATAL_ERROR "FFmpeg swresample is required")
 endif()
-if (NOT OPUS_LIB)
-    message(FATAL_ERROR "opus codec is required")
-endif()
 
 add_subdirectory(Telegram)
diff --git a/Telegram/CMakeLists.txt b/Telegram/CMakeLists.txt
index b422c16d6..651276415 100644
--- a/Telegram/CMakeLists.txt
+++ b/Telegram/CMakeLists.txt
@@ -627,7 +627,7 @@ target_link_libraries(Telegram
     ${SWRESAMPLE_LIBRARIES}
     ${SWSCALE_LIBRARIES}
     ${OPENSSL_LIBRARIES}
-    ${OPUS_LIB}
+    ${OPUS_LIBRARIES}
     ${CONAN_LIBS}
 ) # crashpad::crashpad_client)
 
diff --git a/modules/FindOpus.cmake b/modules/FindOpus.cmake
new file mode 100644
index 000000000..aaa85ec5c
--- /dev/null
+++ b/modules/FindOpus.cmake
@@ -0,0 +1,13 @@
+# - Try to find Opus
+# Once done this will define
+#
+#  OPUS_FOUND - system has opus
+#  OPUS_INCLUDE_DIR - the opus include directory
+#  OPUS_LIBRARIES - Link these to use opus
+
+include(FindPackageHandleStandardArgs)
+
+find_library(OPUS_LIBRARIES opus)
+find_path(OPUS_INCLUDE_DIR opus/opus.h)
+
+find_package_handle_standard_args(Opus DEFAULT_MSG OPUS_INCLUDE_DIR OPUS_LIBRARIES)