libaacplus segfaults when using fftw when fftw is built with SSE(2) SIMD options enabled due to alignment issues. libaacplus does work when fftw is built without SSE(2) options enabled, but at that point there is no benefit gained in using fftw over the built-in FFT code. This also causes ffmpeg to segfault when it tries to use the lib for aac+ encoding. Reproducible: Always
1) Please post your `emerge --info media-libs/libaacplus' output in a comment. 2) Please post the failing command line and its output too.
Created attachment 300681 [details] Ebuild Info Emerge info attached. (currently with fftw USE option turned off)
With FFTW option turned off: =========== $ ffmpeg -i test.wav -acodec libaacplus -ab 64k -f mp4 test.m4a ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers built on Jan 30 2012 12:09:12 with gcc 4.5.3 configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -march=native -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -pipe -fprefetch-loop-arrays -floop-block -floop-strip-mine -floop-interchange' --extra-cflags='-O2 -march=native -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -pipe -fprefetch-loop-arrays -floop-block -floop-strip-mine -floop-interchange' --extra-cxxflags='-O2 -march=native -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -pipe -fprefetch-loop-arrays -floop-block -floop-strip-mine -floop-interchange -fvisibility-inlines-hidden' --disable-static --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --disable-stripping --disable-debug --disable-doc --enable-openssl --enable-nonfree --enable-gnutls --enable-libmp3lame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libtheora --enable-libvorbis --enable-libx2 libavutil 51. 34.101 / 51. 34.101 libavcodec 53. 60.100 / 53. 60.100 libavformat 53. 31.100 / 53. 31.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 60.100 / 2. 60.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 6.100 / 0. 6.100 libpostproc 52. 0.100 / 52. 0.100 [wav @ 0x1c9cc70] max_analyze_duration 5000000 reached at 5015510 Input #0, wav, from 'test.wav': Duration: 00:03:23.22, bitrate: 1411 kb/s Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s Output #0, mp4, to 'test.m4a': Metadata: encoder : Lavf53.31.100 Stream #0:0: Audio: aac (@[0][0][0] / 0x0040), 44100 Hz, 2 channels, s16, 64 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le -> libaacplus) Press [q] to stop, [?] for help size= 1606kB time=00:03:23.22 bitrate= 64.7kbits/s video:0kB audio:1588kB global headers:0kB muxing overhead 1.123113% =========== With FFTW option turned on: =========== $ ffmpeg -i test.wav -acodec libaacplus -ab 64k -f mp4 test2.m4a ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers built on Jan 30 2012 12:09:12 with gcc 4.5.3 configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --ar=x86_64-pc-linux-gnu-ar --optflags='-O2 -march=native -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -pipe -fprefetch-loop-arrays -floop-block -floop-strip-mine -floop-interchange' --extra-cflags='-O2 -march=native -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -pipe -fprefetch-loop-arrays -floop-block -floop-strip-mine -floop-interchange' --extra-cxxflags='-O2 -march=native -mfpmath=sse -ftree-vectorize -fomit-frame-pointer -pipe -fprefetch-loop-arrays -floop-block -floop-strip-mine -floop-interchange -fvisibility-inlines-hidden' --disable-static --enable-gpl --enable-version3 --enable-postproc --enable-avfilter --disable-stripping --disable-debug --disable-doc --enable-openssl --enable-nonfree --enable-gnutls --enable-libmp3lame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libtheora --enable-libvorbis --enable-libx2 libavutil 51. 34.101 / 51. 34.101 libavcodec 53. 60.100 / 53. 60.100 libavformat 53. 31.100 / 53. 31.100 libavdevice 53. 4.100 / 53. 4.100 libavfilter 2. 60.100 / 2. 60.100 libswscale 2. 1.100 / 2. 1.100 libswresample 0. 6.100 / 0. 6.100 libpostproc 52. 0.100 / 52. 0.100 [wav @ 0x19f6c70] max_analyze_duration 5000000 reached at 5015510 Input #0, wav, from 'test.wav': Duration: 00:03:23.22, bitrate: 1411 kb/s Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s Output #0, mp4, to 'test2.m4a': Metadata: encoder : Lavf53.31.100 Stream #0:0: Audio: aac (@[0][0][0] / 0x0040), 44100 Hz, 2 channels, s16, 64 kb/s Stream mapping: Stream #0:0 -> #0:0 (pcm_s16le -> libaacplus) Press [q] to stop, [?] for help Segmentation fault
The bug referenced in the URL given in the original report includes a gdb trace with the relevant debug into turned on, in case you want an example showing the segfault taking place in the FFTW3 lib.
