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• How to solve bad instruction `vadd.i16 q0,q0,q0' when attempting to check gcc for neon instruction

  6 juillet 2012, par newentry

  Checking  gcc supports failed for neon instruction vadd.i16 q0,q0,q0
  
      test.c
  
  
  
      int main ()
  
      {
  
       __asm__("vadd.i16 q0, q0, q0"); return 0;
  
      }
  
  
  
      arm-linux-androideabi-gcc test.c
  
      /tmp/ccfc8m0G.s: Assembler messages:
  
      /tmp/ccfc8m0G.s:24: Error: bad instruction `vadd.i16 q0,q0,q0'

  Tried with flags -mcpu=cortex-a8 -mfpu=neon but stil no success

  Above code was used to test gcc support for neon instruction.

  Actually i am trying to build x264 with NEON support for ARM platformAfter running configure script
  x264 config log file contains

  Command line options : "—cross-prefix=arm-linux-androideabi-" "—enable-pic" "—extra- cflags=-mcpu=cortex-a8" "—host=arm-linux"

  checking whether arm-linux-androideabi-gcc works... yes
  
  checking whether arm-linux-androideabi-gcc supports for( int i = 0; i < 9; i++ ); with -std=gnu99... yes
  
  checking whether arm-linux-androideabi-gcc supports __asm__("rev ip, ip");... yes
  
  checking whether arm-linux-androideabi-gcc supports __asm__("movt r0, #0");... yes
  
  checking whether arm-linux-androideabi-gcc supports __asm__("vadd.i16 q0, q0, q0");... no
  
  
  
  arm-linux-androideabi-gcc conftest.c  -Wall -I. -I$(SRCPATH) -mcpu=cortex-a8 -std=gnu99    -lm -o conftest
  
  E:\cygwin\tmp\ccVtVI1i.s: Assembler messages:
  
  E:\cygwin\tmp\ccVtVI1i.s:24: Error: bad instruction `vadd.i16 q0,q0,q0'
  
  --------------------------------------------------
  
  Failed program was:
  
  --------------------------------------------------
  
  int main () { __asm__("vadd.i16 q0, q0, q0"); return 0; }
  
  --------------------------------------------------
  
  
  
  
  
  config.h contains
  
  
  
  #define HAVE_MALLOC_H 1
  
  #define HAVE_ARMV6 1
  
  #define HAVE_ARMV6T2 1
  
  #define ARCH_ARM 1
  
  #define SYS_LINUX 1
  
  #define HAVE_VECTOREXT 1
  
  #define fseek fseeko
  
  #define ftell ftello
  
  #define HAVE_GPL 1
  
  #define HAVE_INTERLACED 1
  
  #define HAVE_ALTIVEC 0
  
  #define HAVE_ALTIVEC_H 0
  
  #define HAVE_MMX 0
  
  #define HAVE_NEON 0
  
  #define HAVE_BEOSTHREAD 0
  
  #define HAVE_POSIXTHREAD 0
  
  #define HAVE_WIN32THREAD 0
  
  #define HAVE_THREAD 0
  
  #define HAVE_LOG2F 0
  
  #define HAVE_VISUALIZE 0
  
  #define HAVE_SWSCALE 0
  
  #define HAVE_LAVF 0
  
  #define HAVE_FFMS 0
  
  #define HAVE_GPAC 0
  
  #define HAVE_GF_MALLOC 0
  
  #define HAVE_AVS 0
  
  #define HAVE_CPU_COUNT 0
  
  
  
  
  
  Running make command build x264 static lib  based on above config.h which contains HAVE_NEON 0
  
  
  
  
  
  **Compiler Version**
  
  
  
  
  
  
  
  arm-linux-androideabi-gcc -v
  
  Using built-in specs.
  
  Target: arm-linux-androideabi
  
  Configured with: /tmp/ndk-digit/src/build/../gcc/gcc-4.4.3/configure --prefix=/usr/local/google/digit/repo/opensource/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows --target=arm-linux-androideabi --host=i586-mingw32msvc --build=x86_64-linux-gnu --with-gnu-as --with-gnu-ld --enable-languages=c,c++ --with-gmp=/tmp/ndk-digit/build/toolchain/temp-install --with-mpfr=/tmp/ndk-digit/build/toolchain/temp-install --disable-libssp --enable-threads --disable-nls --disable-libmudflap --disable
  
  -libgomp --disable-libstdc__-v3 --disable-sjlj-exceptions --disable-shared --disable-tls --with-float=soft --with-fpu=vfp --with-arch=armv5te --enable-target-optspace --enable-initfini-array --disable-nls --prefix=/usr/local/google/digit/repo/opensource/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows --with-sysroot=/usr/local/google/digit/repo/opensource/ndk/toolchains/arm-linux-androideabi-4.4.3/prebuilt/windows/sysroot --with-binutils-version=2.20.1 --with-mpfr-version=2.4.1 --with
  
  -gmp-version=4.2.4 --with-gcc-version=4.4.3 --with-gdb-version=6.6 --with-arch=armv5te --program-transform-name='s,^,arm-linux-androideabi-,'
  
  Thread model: posix
  
  gcc version 4.4.3 (GCC)    

  Goal is to utilize neon enabled ARM processor to boost x264 encoder performance...

• ffmpeg converter php script not working as expected

  8 juillet 2012, par mintuz

  I have been looking into a php video converter method and have followed a tutorial on how to get one set up. It can read the source video file fine, my script shows an md5, fps rate, bit rate etc but it does not create the destination file. Any suggestions on why my code is not working.

  I have tried both system() ; and exec() ; commands, both do not work and safe_mode is off. I have also tried a more basic command

  "/usr/bin/ffmpeg -i /home/mintuz/video.avi /var/www/video.flv"

  This command however works through the terminal.

  <?php 
  
  define('FFMPEG_LIBRARY', '/usr/bin/ffmpeg');
  
  
  
  //ALTER STUFF HERE
  
  $srcFile = "/home/mintuz/video.avi"; //source file
  
  $destFile = "/var/www/video.flv"; //destination file
  
  
  
  
  
  if (strpos($srcFile, '.avi'))
  
  {
  
      $type = "avi";
  
      echo $type;
  
  }
  
  
  
  if (strpos($srcFile, '.mp4'))
  
  {
  
      $type = "mp4";
  
      echo $type;
  
  }
  
  
  
  if (strpos($srcFile, '.mov'))
  
  {
  
      $type = "mov";
  
      echo $type;
  
  }
  
  
  
  //-------------------------------------------------------------------------------------------------------------------
  
  // Create our FFMPEG-PHP class 
  
  $ffmpegObj = new ffmpeg_movie($srcFile); 
  
  
  
  // Save our needed variables 
  
  $srcWidth = makeMultipleTwo($ffmpegObj->getFrameWidth()); 
  
  echo "<br />".$srcWidth."<br />";
  
  
  
  $srcHeight = makeMultipleTwo($ffmpegObj->getFrameHeight()); 
  
  echo $srcHeight."<br />";
  
  
  
  $srcFPS = $ffmpegObj->getFrameRate();
  
  echo $srcFPS."<br />"; 
  
  
  
  $srcAB = intval($ffmpegObj->getAudioBitRate()/1000);  
  
  $srcAR = $ffmpegObj->getAudioSampleRate();  
  
  
  
  // Call our convert using exec() 
  
  $cmd = FFMPEG_LIBRARY." -i ".$srcFile." -ar ".$srcAR." -ab ".$srcAB." -f flv -s ".$srcWidth."x".$srcHeight." ".$destFile;
  
  system($cmd); 
  
  
  
  echo "Source File MD5 : ".md5_file($srcFile)."<br />";
  
  echo "Destination File MD5 : ".md5_file($destFile);
  
  
  
  // Make multiples function 
  
  function makeMultipleTwo ($value) 
  
  { 
  
      $sType = gettype($value/2); 
  
      if($sType == "integer") 
  
      { 
  
          return $value; 
  
      } else { 
  
          return ($value-1); 
  
      } 
  
  }
  
  ?>

• Revision 2926571be6 : Fix windows build : obj_int_extract to extract numbrs from .rdata The change in

  30 mai 2012, par Alpha Lam

  Changed Paths : Modify /build/make/obj_int_extract.c Fix windows build : obj_int_extract to extract numbrs from .rdata The change in assembly offset files to define values as const int broke Windows build, because the variables are stored in .rdata section instead of .data section. This CL changes (...)