From 655b28ee0c88afcc50bb70c9b3ff00d72aa6214d Mon Sep 17 00:00:00 2001
From: Mansour Moufid <mansourmoufid@gmail.com>
Date: Sun, 1 Feb 2015 15:51:33 -0500
Subject: [PATCH] Use the CMake find_library command to find the FFmpeg
 libraries.

Conflicts:
	cmake/OpenCVFindLibsVideo.cmake
---
 cmake/OpenCVFindLibsVideo.cmake | 70 +++++++++++++++------------------
 1 file changed, 32 insertions(+), 38 deletions(-)

diff --git a/cmake/OpenCVFindLibsVideo.cmake b/cmake/OpenCVFindLibsVideo.cmake
index af46ac5086..b2d927957f 100644
--- a/cmake/OpenCVFindLibsVideo.cmake
+++ b/cmake/OpenCVFindLibsVideo.cmake
@@ -216,49 +216,43 @@ if(WITH_FFMPEG)
         # Do an other trial
         FIND_FILE(BZIP2_LIBRARIES NAMES libbz2.so.1 PATHS /lib)
       endif()
-    endif(HAVE_FFMPEG)
-  endif()
-
-  if(APPLE)
-    find_path(FFMPEG_INCLUDE_DIR "libavformat/avformat.h"
-              PATHS /usr/local /usr /opt
-              PATH_SUFFIXES include
-              DOC "The path to FFMPEG headers")
-    if(FFMPEG_INCLUDE_DIR)
-      set(HAVE_GENTOO_FFMPEG TRUE)
-      set(FFMPEG_LIB_DIR "${FFMPEG_INCLUDE_DIR}/../lib" CACHE PATH "Full path of FFMPEG library directory")
-      if(EXISTS "${FFMPEG_LIB_DIR}/libavcodec.a")
-        set(HAVE_FFMPEG_CODEC 1)
-        set(ALIASOF_libavcodec_VERSION "Unknown")
-        if(EXISTS "${FFMPEG_LIB_DIR}/libavformat.a")
-          set(HAVE_FFMPEG_FORMAT 1)
+    else()
+      find_path(FFMPEG_INCLUDE_DIR "libavformat/avformat.h"
+                PATHS /usr/local /usr /opt
+                PATH_SUFFIXES include
+                DOC "The path to FFMPEG headers")
+      if(FFMPEG_INCLUDE_DIR)
+        set(HAVE_GENTOO_FFMPEG TRUE)
+        set(FFMPEG_LIB_DIR "${FFMPEG_INCLUDE_DIR}/../lib" CACHE PATH "Full path of FFMPEG library directory")
+        find_library(FFMPEG_CODEC_LIB "avcodec" HINTS "${FFMPEG_LIB_DIR}")
+        find_library(FFMPEG_FORMAT_LIB "avformat" HINTS "${FFMPEG_LIB_DIR}")
+        find_library(FFMPEG_UTIL_LIB "avutil" HINTS "${FFMPEG_LIB_DIR}")
+        find_library(FFMPEG_SWSCALE_LIB "swscale" HINTS "${FFMPEG_LIB_DIR}")
+        find_library(FFMPEG_RESAMPLE_LIB "avresample" HINTS "${FFMPEG_LIB_DIR}")
+        if(FFMPEG_CODEC_LIB AND FFMPEG_FORMAT_LIB AND
+           FFMPEG_UTIL_LIB AND FFMPEG_SWSCALE_LIB)
+          set(ALIASOF_libavcodec_VERSION "Unknown")
           set(ALIASOF_libavformat_VERSION "Unknown")
-          if(EXISTS "${FFMPEG_LIB_DIR}/libavutil.a")
-            set(HAVE_FFMPEG_UTIL 1)
-            set(ALIASOF_libavutil_VERSION "Unknown")
-            if(EXISTS "${FFMPEG_LIB_DIR}/libswscale.a")
-              set(HAVE_FFMPEG_SWSCALE 1)
-              set(ALIASOF_libswscale_VERSION "Unknown")
-              set(HAVE_FFMPEG 1)
-              if(EXISTS "${FFMPEG_LIB_DIR}/libavresample.a")
-                  set(HAVE_FFMPEG_RESAMPLE 1)
-                  set(ALIASOF_libavresample_VERSION "Unknown")
-              endif()
-            endif()
+          set(ALIASOF_libavutil_VERSION "Unknown")
+          set(ALIASOF_libswscale_VERSION "Unknown")
+          set(HAVE_FFMPEG 1)
+          if(FFMPEG_RESAMPLE_LIB)
+            set(HAVE_FFMPEG_RESAMPLE 1)
+            set(ALIASOF_libavresample_VERSION "Unknown")
           endif()
         endif()
-      endif()
-    endif(FFMPEG_INCLUDE_DIR)
-    if(HAVE_FFMPEG)
-      set(VIDEOIO_LIBRARIES ${VIDEOIO_LIBRARIES} "${FFMPEG_LIB_DIR}/libavcodec.a"
-          "${FFMPEG_LIB_DIR}/libavformat.a" "${FFMPEG_LIB_DIR}/libavutil.a"
-          "${FFMPEG_LIB_DIR}/libswscale.a")
-      if(HAVE_FFMPEG_RESAMPLE)
+      endif(FFMPEG_INCLUDE_DIR)
+      if(HAVE_FFMPEG)
+        set(VIDEOIO_LIBRARIES ${VIDEOIO_LIBRARIES} "${FFMPEG_LIB_DIR}/libavcodec.a"
+            "${FFMPEG_LIB_DIR}/libavformat.a" "${FFMPEG_LIB_DIR}/libavutil.a"
+            "${FFMPEG_LIB_DIR}/libswscale.a")
+        if(HAVE_FFMPEG_RESAMPLE)
           set(VIDEOIO_LIBRARIES ${VIDEOIO_LIBRARIES} "${FFMPEG_LIB_DIR}/libavresample.a")
-      endif()
-      ocv_include_directories(${FFMPEG_INCLUDE_DIR})
+        endif()
+        ocv_include_directories(${FFMPEG_INCLUDE_DIR})
+      endif(HAVE_FFMPEG)
     endif()
-  endif(APPLE)
+  endif()
 endif(WITH_FFMPEG)
 
 # --- VideoInput/DirectShow ---