diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 81 |
1 files changed, 74 insertions, 7 deletions
diff --git a/configure.ac b/configure.ac index a541524..2c0ee13 100644 --- a/configure.ac +++ b/configure.ac @@ -177,13 +177,80 @@ PKG_CHECK_MODULES([FFMPEG],["libavcodec libavdevice libavformat libavutil libswr AC_SUBST([FFMPEG_CFLAGS]) AC_SUBST([FFMPEG_LIBS]) -#check for speexdsp, which provides the acoustic echo cancellation used in -#calls. Not optional: on Linux there is no other cancellation in the picture -#at all, and on the platforms that have their own it is still the fallback for -#the endpoints and drivers that turn out not to. -PKG_CHECK_MODULES([SPEEXDSP],[speexdsp]) -AC_SUBST([SPEEXDSP_CFLAGS]) -AC_SUBST([SPEEXDSP_LIBS]) +#check for webrtc-audio-processing, which provides AEC3 - the acoustic echo +#cancellation pica-client runs itself. Not optional: on Linux there is no +#other cancellation in the picture unless the user has set their sound server +#up for it, and on the platforms that have their own this is still what the +#"use own echo cancellation" setting selects. +# +#Either the 1.x or the 2.x ABI will do. They install in parallel under +#separate pkg-config names, and pica-client/echocanceller.cpp carries the few +#conditionals the API break between them needs. 0.x is not a candidate at any +#price: it predates AEC3 entirely, and its whole API is different. +# +#1.x is preferred when both are installed, only because it is the one this has +#had the most hours on. --with-webrtc-audio-processing=2 forces the other, +#which is how the 2.x path gets exercised deliberately rather than by accident +#of what is on the build machine. +AC_ARG_WITH([webrtc-audio-processing], + [AS_HELP_STRING([--with-webrtc-audio-processing=@<:@auto|1|2@:>@], + [webrtc-audio-processing major version to build against (default: auto, preferring 1)])], + [], [with_webrtc_audio_processing=auto]) + +AS_CASE([$with_webrtc_audio_processing], + [auto], [webrtc_audio_processing_try="1 2"], + [1], [webrtc_audio_processing_try="1"], + [2], [webrtc_audio_processing_try="2"], + [AC_MSG_ERROR([--with-webrtc-audio-processing must be auto, 1 or 2])]) + +WEBRTC_AUDIO_PROCESSING_MAJOR= +for webrtc_audio_processing_major in $webrtc_audio_processing_try; do + AS_IF([test "x$WEBRTC_AUDIO_PROCESSING_MAJOR" = x], + [PKG_CHECK_MODULES([WEBRTC_AUDIO_PROCESSING], + [webrtc-audio-processing-$webrtc_audio_processing_major], + [WEBRTC_AUDIO_PROCESSING_MAJOR=$webrtc_audio_processing_major], + [:])]) +done + +AS_IF([test "x$WEBRTC_AUDIO_PROCESSING_MAJOR" = x], + [AC_MSG_ERROR(["webrtc-audio-processing was not found. It provides the acoustic echo cancellation used in calls - Debian and Ubuntu call it libwebrtc-audio-processing-1-dev, Gentoo media-libs/webrtc-audio-processing:1"])]) + +AC_MSG_NOTICE([using webrtc-audio-processing-$WEBRTC_AUDIO_PROCESSING_MAJOR]) + +#echocanceller.cpp can work this out from the headers on its own, but only the +#check above knows which one was picked when both are installed. +AC_DEFINE_UNQUOTED([PICA_WEBRTC_AUDIO_PROCESSING_MAJOR], + [$WEBRTC_AUDIO_PROCESSING_MAJOR], + [Major version of the webrtc-audio-processing library being built against]) + +AC_SUBST([WEBRTC_AUDIO_PROCESSING_CFLAGS]) +AC_SUBST([WEBRTC_AUDIO_PROCESSING_LIBS]) + +#the WebRTC headers, and the abseil ones they include, refuse to compile as +#anything older. Recent compilers default to C++17 or later and need nothing +#added; older ones have to be told. +AC_LANG_PUSH([C++]) +AC_MSG_CHECKING([whether $CXX compiles C++17 without help]) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#if __cplusplus < 201703L +#error C++17 is not the default +#endif]], [])], + [AC_MSG_RESULT([yes])], + [ + AC_MSG_RESULT([no]) + pica_saved_cxxflags="$CXXFLAGS" + CXXFLAGS="$CXXFLAGS -std=c++17" + AC_MSG_CHECKING([whether $CXX accepts -std=c++17]) + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#if __cplusplus < 201703L +#error C++17 is not enabled +#endif]], [])], + [AC_MSG_RESULT([yes])], + [ + AC_MSG_RESULT([no]) + CXXFLAGS="$pica_saved_cxxflags" + AC_MSG_ERROR(["A C++17 compiler is required to build pica-client"]) + ]) + ]) +AC_LANG_POP([C++]) #check for libpulse, used only to list PulseAudio sources and sinks in the #settings dialog - playing and capturing through PulseAudio goes via FFmpeg's |