HACKING.asciidoc: fix the url of the avcodec_encode_video2 patch

[libam7xxx.git] / HACKING.asciidoc

diff --git a/HACKING.asciidoc b/HACKING.asciidoc
index ff5c62b..00ca2d8 100644 (file)
--- a/HACKING.asciidoc
+++ b/HACKING.asciidoc
@@ -19,6 +19,9 @@ On a Debian based system, the dependencies can be installed with this command:
                           libavdevice-dev \
                           libswscale-dev
 
+With libav/ffmpeg version previous than 0.9 this patch is needed:
+http://git.ao2.it/libam7xxx.git/blob_plain/refs/heads/debian:/debian/patches/0001-Revert-am7xxx-play-switch-to-avcodec_encode_video2.patch
+
 The library and the example programs can be compiled following these steps:
 
   $ git clone git://git.ao2.it/libam7xxx.git
@@ -47,6 +50,13 @@ can run:
   $ cmake -D CMAKE_C_COMPILER=cgcc ../
   $ make
 
+And for a pre-release check with a different compiler, which never hurts:
+
+  $ mkdir build
+  $ cd build
+  $ cmake -D CMAKE_C_COMPILER=clang -D CMAKE_BUILD_TYPE=debug -D STRICT_COMPILATION_CHECKS=ON ../
+  $ make
+
 === Cross Builds
 
 If you want to build for MS Windows:
@@ -56,13 +66,15 @@ If you want to build for MS Windows:
   $ cd build
   $ wget -nv http://sourceforge.net/projects/libusbx/files/releases/1.0.11/Windows/libusbx-1.0.11-win.7z
   $ 7z -olibusbx-1.0.11-win x libusbx-1.0.11-win.7z
+  $ wget -nv http://win32.libav.org/win32/libav-win32-20120521.7z
+  $ 7z x libav-win32-20120521.7z
   $ cmake  \
           -D GNU_HOST=i686-w64-mingw32 \
           -D CMAKE_TOOLCHAIN_FILE=../cmake_modules/mingw_cross_toolchain.cmake \
           -D CMAKE_INSTALL_PREFIX=libam7xxx-win/ \
           -D LIBUSB_1_INCLUDE_DIR=libusbx-1.0.11-win/include/libusbx-1.0 \
           -D LIBUSB_1_LIBRARY=libusbx-1.0.11-win/MinGW32/dll/libusb-1.0.dll \
-          -D BUILD_AM7XXX-PLAY:BOOL=FALSE \
+          -D FFMPEG_ROOT=$(pwd)/libav-win32-20120521/usr \
           ../
   $ make
 
@@ -76,3 +88,8 @@ dynamic analyzer by using a command like:
 
   $ valgrind --leak-check=full --show-reachable=yes --track-origins=yes \
     ./bin/picoproj -W 800 -H 480 -f my_image.jpg
+
+or, for am7xxx-play:
+
+  $ valgrind --leak-check=full --show-reachable=yes --track-origins=yes \
+    ./bin/am7xxx-play -f x11grab -i :0