debian/control: declare compliance with Debian policy of v4.6.1

[libam7xxx.git] / HACKING.asciidoc

diff --git a/HACKING.asciidoc b/HACKING.asciidoc
index 3c1bc74..8c8a3ce 100644 (file)
--- a/HACKING.asciidoc
+++ b/HACKING.asciidoc
@@ -7,8 +7,8 @@ http://kernel.org/doc/Documentation/CodingStyle
 
 === Getting and compiling libam7xxx
 
-libam7xxx depends on 'libusb-1.0' and optionally on 'libav' or 'ffmpeg' for
-its example programs, the build system used is 'cmake'.
+libam7xxx depends on 'libusb-1.0' and optionally on 'libav' or 'ffmpeg' (3.1+)
+for its example programs, the build system used is 'cmake'.
 
 On a Debian based system, the dependencies can be installed with this command:
 
@@ -17,7 +17,11 @@ On a Debian based system, the dependencies can be installed with this command:
                           libavformat-dev \
                           libavcodec-dev \
                           libavdevice-dev \
-                          libswscale-dev
+                          libswscale-dev \
+                          libxcb1-dev
+
+With libav/ffmpeg version previous than 0.9 this patch is needed:
+https://git.ao2.it/libam7xxx.git/blob/6d2d8613958e1f0ef011e9d848426086caafe9db:/debian/patches/0002-Revert-am7xxx-play-switch-to-avcodec_encode_video2.patch
 
 The library and the example programs can be compiled following these steps:
 
@@ -47,6 +51,13 @@ 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:
@@ -54,17 +65,17 @@ If you want to build for MS Windows:
   $ sudo aptitude install mingw-w64
   $ mkdir build
   $ 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
+  $ wget -nv https://github.com/libusb/libusb/releases/download/v1.0.21/libusb-1.0.21.7z
+  $ 7z -olibusb-1.0.21 x libusb-1.0.21.7z
+  $ wget -nv https://ffmpeg.zeranoe.com/builds/win32/dev/ffmpeg-3.4.2-win32-dev.zip
+  $ unzip ffmpeg-3.4.2-win32-dev.zip
   $ 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 FFMPEG_ROOT=$(pwd)/libav-win32-20120521/usr \
+          -D LIBUSB_1_INCLUDE_DIR=libusb-1.0.21/include/libusb-1.0 \
+          -D LIBUSB_1_LIBRARY=libusb-1.0.21/MinGW32/dll/libusb-1.0.dll \
+          -D FFMPEG_ROOT=$(pwd)/ffmpeg-3.4.2-win32-dev \
           ../
   $ make
 
@@ -78,3 +89,8 @@ 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