DLNA

Setup DLNA server on NAS

• Target NAS: NAS-01G
• ppc-linux

Server

• MediaTomb
• MiniDLNA

Cross Compile Environment http://www.pages.drexel.edu/~sg64/stuff/cross-compile.htm

• Directories

  $HOME/cross-compile/$TARGET/usr/bin
  $HOME/cross-compile/$TARGET/install/module-X.Y.Z
  $HOME/cross-compile/$TARGET/build/module-X.Y.Z
  $HOME/cross-compile/$TARGET/usr/src/module-X.Y.Z
  

• General Setup

  export TARGET=powerpc-linux
  
  export PREFIX=$HOME/cross-compile/$TARGET/install
  export PATH=$HOME/cross-compile/$TARGET/usr/bin:$PATH
  export CC=$TARGET-gcc
  
  echo "Cross Compile Envirnment for $TARGET"
  

• binutils-2.21

  ./configure --target=$TARGET --prefix=$PREFIX/binutils-2.21 \
  --enable-shared \
  --disable-nls   #native language support. This is for i18n \
  

• runtime環境のコピー 　runtime/lib/libc.so 等を修正 pthread関係もある。 　GROUP ( libc.so.6 libc_nonshared.a )

• gcc-4.1.2 (gcc-core-4.1.2)

  ./configure --target=$TARGET --prefix=$PREFIX/gcc-4.1.2 \
  --enable-shared \
  --disable-nls \
  --with-as=/home/hideo/cross-compile/powerpc-linux/usr/bin/powerpc-linux-as \
  --with-ld=/home/hideo/cross-compile/powerpc-linux/usr/bin/powerpc-linux-ld \
  --with-headers=$HOME/runtime/include \
  --with-libs=$HOME/runtime/lib \
  --enable-language=c,c++
  

---

• libexif

  ./configure --target=$TARGET --prefix=$PREFIX/libexif-0.6.20 \
  --host=$TARGET \
  --disable-nls 
  

• libjpeg

  ./configure --host=$TARGET --prefix=$PREFIX/jpeg-8b
  

• zlib

  ./configure --prefix=$PREFIX/zlib-1.2.5
  

• libid3tag

  ./configure --host=$TARGET --prefix=$PREFIX/libid3tag-0.15.1b
  

• libogg-1.2.2

  ./configure --host=$TARGET --prefix=$PREFIX/libogg-1.2.2
  

• libFLAC

  ./configure --host=$TARGET --prefix=$PREFIX/flac-1.2.1 \
  --disable-cpplibs
  

• libvorbis

  ./configure --host=$TARGET --prefix=$PREFIX/libvorbis
  

• sqlite3

  ./configure --host=$TARGET --prefix=$PREFIX/sqlite-autoconf-3070400
  

runtime環境でライブラリのパスを修正していないと、正しいライブラリとリンクしてくれないので注意

• libavformat (the ffmpeg libraries)

  ./configure --arch=$TARGET --prefix=$PREFIX/ffmpeg-0.6.1 \
  --enable-shared \
  --enable-nonfree \
  --disable-ffmpeg \
  --disable-ffplay \
  --disable-ffprobe \
  --disable-ffserver \
  --disable-avdevice \
  --disable-avcodec \
  --disable-swscale \
  --disable-altivec
  

• libuuid

• minidlna

  sendfileがNAS-01Gのカーネルに実装されていないので、read writeを用いて自分で実装する必要がある。
  http://www.man7.org/tlpi/code/online/dist/sockets/sendfile.c.html
  

void
send_file(struct upnphttp * h, int sendfd, off_t offset, off_t end_offset)
{
   off_t orig;
   char buf[MAX_BUFFER_SIZE];
   size_t toRead, numRead, numSent, totSent;

   if (offset != NULL) {

       /* Save current file offset and set offset to value in '*offset' */

       orig = lseek(sendfd, 0, SEEK_CUR);
       if (orig == -1)
           return -1;
       if (lseek(sendfd, offset, SEEK_SET) == -1)
           return -1;
   }

   totSent = 0;

   while (end_offset > 0) {
       toRead = end_offset < MAX_BUFFER_SIZE ? end_offset : MAX_BUFFER_SIZE;

       numRead = read(sendfd, buf, toRead);
       if (numRead == -1)
           return -1;
       if (numRead == 0)
           break;                      /* EOF */

       numSent = write(h->socket, buf, numRead);
       if (numSent == -1)
           return -1;
       if (numSent == 0)               /* Should never happen */
           DPRINTF(E_ERROR, L_HTTP, "sendfile: write() transferred 0 bytes");

       end_offset -= numSent;
       totSent += numSent;
   }

   if (offset != NULL) {

       /* Return updated file offset in '*offset', and reset the file offset
          to the value it had when we were called. */

       offset = lseek(sendfd, 0, SEEK_CUR);
       if (offset == -1)
           return -1;
       if (lseek(sendfd, orig, SEEK_SET) == -1)
           return -1;
   }
}