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• ffmpeg libx264 neon optimization breaks execution

  27 janvier 2014, par nmxprime

  Hi use libx264 source obtained from x264-snapshot-20140122-2245 and compiling using below script

  NDK=~/Android/android-ndk-r7c
  
  PLATFORM=$NDK/platforms/android-9/arch-arm/
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86
  
  function build_one
  
  {
  
  ./configure --prefix=$PREFIX \
  
  --sysroot=$PLATFORM \
  
  --disable-avs \
  
  --disable-lavf \
  
  --disable-ffms \
  
  --disable-gpac \
  
  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
  --host=arm-linux \
  
  --enable-static \
  
  --libdir=$PLATFORM/usr/lib \
  
  --includedir=$PLATFORM/usr/include \
  
  --extra-cflags="-march=armv7-a -mfloat-abi=softfp -mfpu=neon -mvectorize-with-neon-quad" \
  
  --extra-ldflags="-Wl,--fix-cortex-a8" \
  
  --enable-debug

  The config log is :

  platform:      ARM
  
  system:        LINUX
  
  cli:           yes
  
  libx264:       internal
  
  shared:        no
  
  static:        yes
  
  asm:           yes
  
  interlaced:    yes
  
  avs:           no
  
  lavf:          no
  
  ffms:          no
  
  mp4:           no
  
  gpl:           yes
  
  thread:        no
  
  opencl:        yes
  
  filters:       crop select_every
  
  debug:         yes
  
  gprof:         no
  
  strip:         no
  
  PIC:           no
  
  bit depth:     8
  
  chroma format: all
  
  
  
  You can run 'make' or 'make fprofiled' now.

  I hope the above code compiles and optimizes for NEON execution

  Doubts :

  Why Threads is no, because i didn't specified --disable-thread

  What is cli and it's significance here, also significance of opencl, such that libx264 uses opencl features ?

  ---

  Then i built ffmpeg 1.2.5with following script

  ./configure --target-os=linux \
  
  --prefix=$PREFIX \
  
  --enable-cross-compile \
  
  --extra-libs="-lgcc" \
  
  --arch=arm \
  
  --cc=$PREBUILT/bin/arm-linux-androideabi-gcc \
  
  --cross-prefix=$PREBUILT/bin/arm-linux-androideabi- \
  
  --nm=$PREBUILT/bin/arm-linux-androideabi-nm \
  
  --sysroot=$PLATFORM \
  
  --extra-cflags=" -O3 -fpic -DANDROID -DHAVE_SYS_UIO_H=1 -Dipv6mr_interface=ipv6mr_ifindex -fasm -Wno-psabi -fno-short-enums -fno-strict-aliasing -finline-limit=300 $OPTIMIZE_CFLAGS " \
  
  --disable-shared \
  
  --enable-static \
  
  --extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog -lx264 $EXTRA_LD_FLAG" \
  
  --disable-ffplay \
  
  --disable-everything \
  
  --enable-avformat \
  
  --enable-avcodec \
  
  --enable-libx264 \
  
  --enable-gpl \
  
  --enable-encoder=libx264 \
  
  --enable-encoder=libx264rgb \
  
  --enable-decoder=h264 \
  
  --disable-network \
  
  --disable-avfilter \
  
  --disable-avdevice \
  
  --enable-debug=3 \
  
  $ADDITIONAL_CONFIGURE_FLAG

  where

  ADDITIONAL_CONFIGURE_FLAG = --enable-debug=3
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=neon -marm -march=$CPU -mvectorize-with-neon-quad"

  The log shows NEON supported.

  When i run the code (called in a while loop),

  ret = avcodec_encode_video2(c, &pkt, picture, &got_output);//avcodec_encode_video(c, finalout, outbuf_size, picture);
  
  
  
  fprintf(stderr,"ret = %d, got-out = %d \n",ret,got_output);
  
  if (ret < 0) 
  
          fprintf(stderr, "error encoding frame\n");
  
  
  
      if (got_output) 
  
          fprintf(stderr,"encoding frame %3d (size=%5d): (ret=%d)\n", 1, pkt.size,ret);

  it runs for 2 or 3 time(during which if(got_output) is not true), then i get SIGSEGV. Tried addr2line and ndk-stack but no use[Though i enabled debug info, ndk-stack cannot find routine info].

  I edited libx264's encoder.c code with some fprintf statements.
  Posting snippet of code

     if( h->frames.i_input <= h->frames.i_delay + 1 - h->i_thread_frames )
  
      {
  
          /* Nothing yet to encode, waiting for filling of buffers */
  
          pic_out->i_type = X264_TYPE_AUTO;
  
  fprintf(stderr,"EditLog:: Returns as waiting for filling \n"); //edit
  
          return 0;
  
      }
  
  }
  
  
  
  else
  
  {
  
      /* signal kills for lookahead thread */
  
      x264_pthread_mutex_lock( &h->lookahead->ifbuf.mutex );
  
      h->lookahead->b_exit_thread = 1;
  
      x264_pthread_cond_broadcast( &h->lookahead->ifbuf.cv_fill );
  
      x264_pthread_mutex_unlock( &h->lookahead->ifbuf.mutex );
  
  }
  
  fprintf(stderr,"After wait for fill \n");
  
  fprintf(stderr,"h: %p \n",h); //edit
  
  fprintf(stderr,"h->i_frame = %p \n",&h->i_frame); //edit
  
  h->i_frame++;
  
  fprintf(stderr,"after i_frame++");

  in log, i don't see after i_frame++, here occurs (may be) the SIGSEGV.

  Please help in solving it. The same works without neon optimization !!

• android ffmpeg for multiple arch

  15 avril 2014, par misgood

  I'm building ffmpeg for android. It works fine with arm but fail with x86.

  compilation is ok. But if I run the apk which use this x86 ffmpeg lib, logcat will print following errors :

  04-13 10:30:09.862: E/dalvikvm(1262): dlopen("/data/app-lib/com.misgood.ipcamdemo-2/libplayer.so") failed: Cannot load library: soinfo_link_image(linker.cpp:1635): could not load library "libavformat-55.so" needed by "libplayer.so"; caused by load_library(linker.cpp:745): library "libavformat-55.so" not found

  I'd checked apk file. All shared libraries are exist.

  I guess the problem is the libraries is not config properly.

  Any suggestions would be appreciated.

  Here is the script that I use to building ffmpeg for android arm and x86

  #!/bin/bash
  
  NDK=$HOME/android-ndk-r9c
  
  
  
  function build_core
  
  {
  
  ./configure \
  
      --prefix=$PREFIX \
  
      --enable-shared \
  
      --disable-static \
  
      --disable-doc \
  
      --disable-ffmpeg \
  
      --disable-ffplay \
  
      --disable-ffprobe \
  
      --disable-ffserver \
  
      --disable-avdevice \
  
      --disable-doc \
  
      --disable-symver \
  
      --disable-error-resilience \
  
      --disable-decoder=h263p \
  
      --disable-decoder=mpegvideo \
  
      --target-os=linux \
  
      --enable-cross-compile \
  
      --sysroot=$SYSROOT \
  
      --extra-cflags="-std=c99 -O3 -fpic -DANDROID $ADDI_CFLAGS" \
  
      --extra-ldflags="$ADDI_LDFLAGS" \
  
      $ARCH_SPEC \
  
      $ADDITIONAL_CONFIGURE_FLAG
  
  make clean
  
  make -j4
  
  make install
  
  }
  
  
  
  function build_arm
  
  {
  
  SYSROOT=$NDK/platforms/android-19/arch-arm/
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
  
  CPU=arm
  
  PREFIX=$(pwd)/android/$CPU 
  
  ADDI_CFLAGS="-marm"
  
  ARCH_SPEC="--arch=arm \
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
  "
  
  build_core
  
  }
  
  
  
  function build_x86
  
  {
  
  SYSROOT=$NDK/platforms/android-19/arch-x86/
  
  TOOLCHAIN=$NDK/toolchains/x86-4.8/prebuilt/linux-x86_64
  
  CPU=x86
  
  PREFIX=$(pwd)/android/$CPU 
  
  ADDI_CFLAGS="-mincoming-stack-boundary=4 -march=i686 -mtune=atom -mstackrealign -msse3 -mfpmath=sse -m32"
  
  ARCH_SPEC="--arch=x86 \
  
      --cross-prefix=$TOOLCHAIN/bin/i686-linux-android- \
  
      --cpu=i686
  
  "
  
  build_core
  
  }
  
  
  
  build_x86

• How to Compile FFmpeg with x264 and libfdk-aac for Android

  12 novembre 2016, par Codeveloper

  Everyone.

  Please understand that i use the wrong english.

  I want to make encoding application using FFmpeg.

  I was successfully building NDK with FFmpeg.

  However, to encode H.264 video made had failed( Codec not found.. ).

  I was learned that libx264 is need encode H.264 and libfdk-aac is need encode AAC.

  so I tried to build the libx264 and libfdk-aac, But does not easily cross-compile.

  Please tell me what I did wrong.

  My Development Environment

  OS : ubuntu 13.10 64bit

  NDK : android-ndk-r9

  FFmpeg : ffmpeg-2.0.2

  x264 build : build_x264_android.sh

  NDK=$ANDROID_NDK_HOME
  
  
  
  TOOLCHAIN=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64
  
  PLATFORM=$NDK/platforms/android-9/arch-arm
  
  CPU=arm
  
  PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU
  
  
  
  ./configure --prefix=$PREFIX \
  
      --enable-shared \
  
      --enable-pic \
  
      --disable-asm \
  
      --disable-cli \
  
      --host=arm-linux \
  
      --cross-prefix=$TOOLCHAIN/bin/arm-linux-androideabi- \
  
      --sysroot=$PLATFORM
  
  
  
  make
  
  make install
  
  ldconfig

  fdk-aac build : build_aac_android.sh

  NDK=$ANDROID_NDK_HOME
  
  CROSS_PREFIX=$NDK/toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-
  
  PLATFORM=$NDK/platforms/android-9/arch-arm
  
  CPU=arm
  
  PREFIX=$NDK/sources/ffmpeg-2.0.2/android/$CPU
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__"
  
  
  
  ./configure --prefix=$PREFIX \
  
      --with-sysroot=$PLATFORM \
  
      --host=arm-linux \
  
      --enable-shared \
  
      --with-pic=no \
  
      CC="${CROSS_PREFIX}gcc --sysroot=$PLATFORM" \
  
      CXX="${CROSS_PREFIX}g++ --sysroot=$PLATFORM" \
  
      RANLIB="${CROSS_PREFIX}ranlib" \
  
      AR="${CROSS_PREFIX}ar" \
  
      STRIP="${CROSS_PREFIX}strip" \
  
      NM="${CROSS_PREFIX}nm" \
  
      CFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM" \
  
      CXXFLAGS="-O3 $OPTIMIZE_CFLAGS --sysroot=$PLATFORM"
  
  
  
  make
  
  make install

  When I run ’build_aac_android.sh’, shown error.

  log in config.log

  configure:2907: checking for arm-linux-gcc
  
  configure:2934: result: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm
  
  configure:3203: checking for C compiler version
  
  configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm --version >&5
  
  ./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
  
  configure:3223: $? = 127
  
  configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -v >&5
  
  ./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
  
  configure:3223: $? = 127
  
  configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -V >&5
  
  ./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
  
  configure:3223: $? = 127
  
  configure:3212: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -qversion >&5
  
  ./configure: line 3214: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
  
  configure:3223: $? = 127
  
  configure:3243: checking whether the C compiler works
  
  configure:3265: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc --sysroot=/platforms/android-9/arch-arm -O3 -mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=armv7-a -mthumb -D__thumb__ --sysroot=/platforms/android-9/arch-arm   conftest.c  >&5
  
  ./configure: line 3267: /toolchains/arm-linux-androideabi-4.8/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc: No such file or directory
  
  
  
  configure:3312: error: in `/home/nel/android-ndk-r9/sources/ffmpeg-2.0.2/libfdk-aac':
  
      configure:3314: error: C compiler cannot create executables
  
      See `config.log' for more details

  I cannot understand that error !! I was confirmed that arm-linux-androideabi-gcc is found in the directory..

  I want to borrow you wisdom. Please tell me how to ’ffmpeg+x264+fdk-aac’ build for android.

  Thanks.. :-)