Recherche avancée

Sur d’autres sites (12187)

• Adding C64 SID Music

  1er novembre 2012, par Multimedia Mike — General

  I have been working on adding support for SID files — the music format for the Commodore 64 — to the game music website for awhile. I feel a bit out of my element since I’m not that familiar with the C64. But why should I let that slow me down ? Allow me to go through the steps I have previously outlined in order to make this happen.

  
  
  

  I need to know what picture should represent the system in the search results page. The foregoing picture should be fine, but I’m getting way ahead of myself.

  Phase 1 is finding adequate player software. The most venerable contender in this arena is libsidplay, or so I first thought. It turns out that there’s libsidplay (originally hosted at Geocities, apparently, and no longer on the net) and also libsidplay2. Both are kind of old (libsidplay2 was last updated in 2004). I tried to compile libsidplay2 and the C++ didn’t agree with current version of g++.

  However, a recent effort named libsidplayfp is carrying on the SID emulation tradition. It works rather well, notwithstanding the fact that compiling the entire library has a habit of apparently hanging the Linux VM where I develop this stuff.

  Phase 2 is to develop a testbench app around the playback library. With the help of the libsidplayfp library maintainers, I accomplished this. The testbench app consistently requires about 15% of a single core of a fairly powerful Core i7. So I look forward to recommendations that I port that playback library to pure JavaScript.

  Phase 3 is plug into the web player. I haven’t worked on this yet. I’m confident that this will work since phase 2 worked (plus, I have a plan to combine phases 2 and 3).

  One interesting issue that has arisen is that proper operation of libsidplayfp requires that 3 C64 ROM files be present (the, ahem, KERNAL, BASIC interpreter, and character generator). While these are copyrighted ROMs, they are easily obtainable on the internet. The goal of my project is to eliminate as much friction as possible for enjoying these old tunes. To that end, I will just bake the ROM files directly into the player.

  Phase 4 is collecting a SID song corpus. This is the simplest part of the whole process thanks to the remarkable curation efforts of the High Voltage SID Collection (HVSC). Anyone can download a giant archive of every known SID file. So that’s a done deal.

  Or is it ? One small issue is that I was hoping that the first iteration of my game music website would focus on, well, game music. There is a lot of music in the HVSC that are original compositions or come from demos. The way that the archive is organized makes it difficult to automatically discern whether a particular SID file comes from a game or not.

  Phase 5 is munging the metadata. The good news here is that the files have the metadata built in. The not-so-great news is that there isn’t quite as much as I might like. Each file is tagged with title, author, and publisher/copyright. If there is more than one song in a file, they all have the same metadata. Fortunately, if I can import them all into my game music database, there is an opportunity to add a lot more metadata.

  Further, there is no play length metadata for these files. This means I will need to set each to a default length like 2 minutes and do something like I did before in order to automatically determine if any songs terminate sooner.

  Oddly, the issue I’m most concerned about is character encoding. This is the first project for which I’m making certain that I understand character encoding since I can’t reasonably get away with assuming that everything is ASCII. So far, based on the random sampling of SID files I have checked, there is a good chance of encountering metadata strings with characters that are not in the lower ASCII set. From what I have observed, these characters map to Unicode code points. So I finally get to learn about manipulating strings in such a way that it preserves the character encoding. At the very least, I need Python to rip the strings out of the binary SID files and make sure the Unicode remains intact while being inserted into an SQLite3 database.

• Yet another ffmpeg/libx264 issue

  26 décembre 2013, par kerim yucel

  My current situation is ; ffmpeg and libx264 has been compiled for Android, as shared and static libraries respectively. Since I have libx264.a and libffmpeg.so with me, only thing that remains is to link them and obtain a ffmpeg library that would allow me to proceed with my application. However, some questions remain unanswered. I am using Ubuntu with a virtual machine under Windows 7. I am using x264’s last version, ffmpeg 0.10.4 release and NDK 7.

  I have tried to adjust flags (extracf and extrald) in order to include libx264 to ffmpeg compilation process as well, however I keep failing. Below you may find my build script for ffmpeg and the errors I have encountered.

  NDK=~/Android_NDK_r7b 
  
  PLATFORM=$NDK/platforms/android-8/arch-arm/ 
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86 
  
  x264=/usr/local 
  
  #x264v2=~/x264 
  
  function build_one 
  
  { 
  
  ./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 " \ 
  
      --extra-cflags="-I$x264/include" \ 
  
      --enable-shared \ 
  
      --enable-static \ 
  
      #--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib  -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \ 
  
      --extra-ldflags="-L$x264/lib" \ 
  
     --disable-everything \ 
  
     # --enable-demuxer=mov \ 
  
     # --enable-demuxer=h264 \ 
  
     # --disable-ffplay \ 
  
      --enable-gpl \ 
  
      --enable-libx264 \ 
  
     # --enable-protocol=file \ 
  
     # --enable-avformat \ 
  
     # --enable-avcodec \ 
  
     # --enable-encoder=libx264 \ 
  
     # --enable-decoder=rawvideo \ 
  
     #--enable-decoder=mjpeg \ 
  
     # --enable-decoder=h263 \ 
  
     # --enable-decoder=mpeg4 \ 
  
     # --enable-encoder=h264 \ 
  
     # --disable-network \ 
  
      #--enable-zlib \ 
  
     # --disable-avfilter \ 
  
      #--disable-avdevice \ 
  
      $ADDITIONAL_CONFIGURE_FLAG 
  
  
  
  make clean 
  
  make  -j4 install 
  
  $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o 
  
  $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a 
  
  } 
  
  
  
  #arm v7vfpv3 
  
  CPU=armv7-a 
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU " 
  
  PREFIX=./androidIncludeTrialsNDK7/$CPU 
  
  ADDITIONAL_CONFIGURE_FLAG= 
  
  build_one 

  If I basically delete the lines extracf and extrald flags and use other ones (commented outs), it works fine except libx264 not found error. Otherwise, I get the following erros.

  ./buildnew.sh: line 35: --extra-cflags=-I/usr/local/include: No such file or directory 
  
  ./buildnew.sh: line 38: --extra-ldflags=-L/usr/local/lib: No such file or directory 
  
  ./buildnew.sh: line 40: --disable-everything: command not found 
  
  ./buildnew.sh: line 44: --enable-gpl: command not found 

  The compilation process ends with the following.

  make: *** [libavdevice/v4l.o] Error 1 
  
  make: *** Waiting for unfinished jobs.... 
  
  /home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ar: creating libavcodec/libavcodec.a 
  
  /home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld: cannot open output file ./androidIncludeTrialsNDK7/armv7-a/libffmpeg.so: No such file or directory 

  I have x264 installed in my directory /home/mehmet/x264 and I also check whereis x264.a, it shows me as /usr/local/lib. I have tried changing the path $x264 to point out to home/mehmet/x264 folder, but I get the same error.

  Lastly, if I enable both extracf and extrald flags ( both commented ones and the used ones) . I get the same error mentioned above. I am afraid I am doing a simple typo here, but can`t see it and it is driving me crazy. Thanks a lot for your help.

  Best.

  EDIT

  I have deleted the comments and now obtain the following.

  ./buildnew.sh: 4: ./buildnew.sh: function: not found
  
  ERROR: libx264 not found

  Above error is observed from the terminal when I run the script. It build upto some point and finishes the process with the following error.

  libavcodec/libavcodec.a(libx264.o): In function `X264_frame':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:159: undefined reference to `x264_picture_init'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:179: undefined reference to `x264_encoder_reconfig'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:191: undefined reference to `x264_encoder_encode'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:197: undefined reference to `x264_encoder_delayed_frames'
  
  libavcodec/libavcodec.a(libx264.o): In function `encode_nals':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:196: undefined reference to `x264_bit_depth'
  
  libavcodec/libavcodec.a(libx264.o): In function `X264_close':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:231: undefined reference to `x264_encoder_close'
  
  libavcodec/libavcodec.a(libx264.o): In function `X264_init':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:284: undefined reference to `x264_param_default'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:292: undefined reference to `x264_param_default_preset'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:305: undefined reference to `x264_param_parse'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:502: undefined reference to `x264_param_apply_fastfirstpass'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:505: undefined reference to `x264_param_apply_profile'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:544: undefined reference to `x264_encoder_open_125'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:554: undefined reference to `x264_encoder_headers'
  
  ./buildnew.sh: 51: ./buildnew.sh: build_one: not found

• Yet another ffmpeg/libx264 issue

  26 décembre 2013, par kerim yucel

  My current situation is ; ffmpeg and libx264 has been compiled for Android, as shared and static libraries respectively. Since I have libx264.a and libffmpeg.so with me, only thing that remains is to link them and obtain a ffmpeg library that would allow me to proceed with my application. However, some questions remain unanswered. I am using Ubuntu with a virtual machine under Windows 7. I am using x264's last version, ffmpeg 0.10.4 release and NDK 7.

  I have tried to adjust flags (extracf and extrald) in order to include libx264 to ffmpeg compilation process as well, however I keep failing. Below you may find my build script for ffmpeg and the errors I have encountered.

  NDK=~/Android_NDK_r7b 
  
  PLATFORM=$NDK/platforms/android-8/arch-arm/ 
  
  PREBUILT=$NDK/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86 
  
  x264=/usr/local 
  
  #x264v2=~/x264 
  
  function build_one 
  
  { 
  
  ./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 " \ 
  
      --extra-cflags="-I$x264/include" \ 
  
      --enable-shared \ 
  
      --enable-static \ 
  
      #--extra-ldflags="-Wl,-rpath-link=$PLATFORM/usr/lib  -L$PLATFORM/usr/lib -nostdlib -lc -lm -ldl -llog" \ 
  
      --extra-ldflags="-L$x264/lib" \ 
  
     --disable-everything \ 
  
     # --enable-demuxer=mov \ 
  
     # --enable-demuxer=h264 \ 
  
     # --disable-ffplay \ 
  
      --enable-gpl \ 
  
      --enable-libx264 \ 
  
     # --enable-protocol=file \ 
  
     # --enable-avformat \ 
  
     # --enable-avcodec \ 
  
     # --enable-encoder=libx264 \ 
  
     # --enable-decoder=rawvideo \ 
  
     #--enable-decoder=mjpeg \ 
  
     # --enable-decoder=h263 \ 
  
     # --enable-decoder=mpeg4 \ 
  
     # --enable-encoder=h264 \ 
  
     # --disable-network \ 
  
      #--enable-zlib \ 
  
     # --disable-avfilter \ 
  
      #--disable-avdevice \ 
  
      $ADDITIONAL_CONFIGURE_FLAG 
  
  
  
  make clean 
  
  make  -j4 install 
  
  $PREBUILT/bin/arm-linux-androideabi-ar d libavcodec/libavcodec.a inverse.o 
  
  $PREBUILT/bin/arm-linux-androideabi-ld -rpath-link=$PLATFORM/usr/lib -L$PLATFORM/usr/lib  -soname libffmpeg.so -shared -nostdlib  -z,noexecstack -Bsymbolic --whole-archive --no-undefined -o $PREFIX/libffmpeg.so libavcodec/libavcodec.a libavformat/libavformat.a libavutil/libavutil.a libswscale/libswscale.a -lc -lm -lz -ldl -llog  --warn-once  --dynamic-linker=/system/bin/linker $PREBUILT/lib/gcc/arm-linux-androideabi/4.4.3/libgcc.a 
  
  } 
  
  
  
  #arm v7vfpv3 
  
  CPU=armv7-a 
  
  OPTIMIZE_CFLAGS="-mfloat-abi=softfp -mfpu=vfpv3-d16 -marm -march=$CPU " 
  
  PREFIX=./androidIncludeTrialsNDK7/$CPU 
  
  ADDITIONAL_CONFIGURE_FLAG= 
  
  build_one 

  If I basically delete the lines extracf and extrald flags and use other ones (commented outs), it works fine except libx264 not found error. Otherwise, I get the following erros.

  ./buildnew.sh: line 35: --extra-cflags=-I/usr/local/include: No such file or directory 
  
  ./buildnew.sh: line 38: --extra-ldflags=-L/usr/local/lib: No such file or directory 
  
  ./buildnew.sh: line 40: --disable-everything: command not found 
  
  ./buildnew.sh: line 44: --enable-gpl: command not found 

  The compilation process ends with the following.

  make: *** [libavdevice/v4l.o] Error 1 
  
  make: *** Waiting for unfinished jobs.... 
  
  /home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ar: creating libavcodec/libavcodec.a 
  
  /home/mehmet/Android_NDK_r7b/toolchains/arm-linux-androideabi-4.4.3/prebuilt/linux-x86/bin/arm-linux-androideabi-ld: cannot open output file ./androidIncludeTrialsNDK7/armv7-a/libffmpeg.so: No such file or directory 

  I have x264 installed in my directory /home/mehmet/x264 and I also check whereis x264.a, it shows me as /usr/local/lib. I have tried changing the path $x264 to point out to home/mehmet/x264 folder, but I get the same error.

  Lastly, if I enable both extracf and extrald flags ( both commented ones and the used ones) . I get the same error mentioned above. I am afraid I am doing a simple typo here, but can`t see it and it is driving me crazy. Thanks a lot for your help.

  Best.

  EDIT

  I have deleted the comments and now obtain the following.

  ./buildnew.sh: 4: ./buildnew.sh: function: not found
  
  ERROR: libx264 not found

  Above error is observed from the terminal when I run the script. It build upto some point and finishes the process with the following error.

  libavcodec/libavcodec.a(libx264.o): In function `X264_frame':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:159: undefined reference to `x264_picture_init'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:179: undefined reference to `x264_encoder_reconfig'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:191: undefined reference to `x264_encoder_encode'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:197: undefined reference to `x264_encoder_delayed_frames'
  
  libavcodec/libavcodec.a(libx264.o): In function `encode_nals':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:196: undefined reference to `x264_bit_depth'
  
  libavcodec/libavcodec.a(libx264.o): In function `X264_close':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:231: undefined reference to `x264_encoder_close'
  
  libavcodec/libavcodec.a(libx264.o): In function `X264_init':
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:284: undefined reference to `x264_param_default'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:292: undefined reference to `x264_param_default_preset'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:305: undefined reference to `x264_param_parse'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:502: undefined reference to `x264_param_apply_fastfirstpass'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:505: undefined reference to `x264_param_apply_profile'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:544: undefined reference to `x264_encoder_open_125'
  
  /home/mehmet/ffmpeg-0.10.4/libavcodec/libx264.c:554: undefined reference to `x264_encoder_headers'
  
  ./buildnew.sh: 51: ./buildnew.sh: build_one: not found