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Codice: Seleziona tutto

Vai su http://linuxtv.org/hg/v4l-dvb
Se guardi in alto a sinistra, troverai i link gz e bz2 che contengono tutto il malloppo.
Scarica uno dei due e scompattalo
La directory principale nel mio caso si trova in v4l-dvb-83712d149893 (ma i numeri possono essere diversi, non cambia nulla)
I sorgenti uvc si trovano in v4l-dvb-83712d149893/linux/drivers/media/video/uvc ed è qui che andrà collocato il solito file di patch.

Dentro la directory v4l-dvb-83712d149893/linux/drivers/media/video/uvc c'è un file, uvc_video.c

1: apritelo con gedit
2: col comando cerca trovate questo punto del file: static void uvc_video_decode_data (semplicemente cercate questa frase, ce n'è solo una).

La funzione si sviluppa da questa riga all'ultima parentesi graffa prima che inizi "static void uvc_video_decode_end".

Voi dovete sostituire (con un copia incolla) la suddetta funzione del vostro file con questa postata da me (vedrete che la prima e l'ultima parte della funzione sono identiche), cioè:
---
static void uvc_video_decode_data(struct uvc_streaming *stream,
      struct uvc_buffer *buf, const __u8 *data, int len)
{
   struct uvc_video_queue *queue = &stream->queue;
   unsigned int maxlen, nbytes, row_size, to_be_copied, shift_right;
   void *mem;

   if (len <= 0)
      return;

   /* Copy the video data to the buffer. */
   maxlen = buf->buf.length - buf->buf.bytesused;
   mem = queue->mem + buf->buf.m.offset + buf->buf.bytesused;
   nbytes = min((unsigned int)len, maxlen);
   row_size = stream->cur_frame->wWidth *
                 stream->format->bpp / 8;
   /* Each loop "nbytes" is decremented of the number of bytes just copied.
    * So are there any other bytes to be copied?
    */
   while (nbytes > 0) {
      /* As the rows of modified frames have to be fulfilled from
       * bottom-left to top-right, each cycle tries to complete a
       * single row.
       * In this cycle where is it needed to start to store bytes
       * within the selected row? From the beginning or shifted
       * right? Because other bytes could have been already stored in
       * that row without completing it, so it could be needed a right
       * shift.
       */
      shift_right = buf->buf.bytesused % row_size;
      /* In this cycle how many byte can we copy in the selected row?
       */
      if (nbytes > row_size - shift_right)
         to_be_copied = row_size - shift_right ;
      else
         to_be_copied = nbytes;
      /* "queue->mem + buf->buf.m.offset" is the base-address where to
       * start to store the current frame. This address refers to a
       * preallocated area (just for a sigle frame) taking part in a
       * circular buffer, where to store a fixed number of sequent
       * frames.
       */
      memcpy(queue->mem + buf->buf.m.offset
             /* Go to the end of this frame. */
             + row_size * stream->cur_frame->wHeight
             /* Go back for the number of bytes corrisponding to the
              * already fully completed rows.
         */
             - (buf->buf.bytesused - shift_right)
             /* Go back at the starting point of the upper row. */
             - row_size
             /* Shift right on this row if it is needed. */
             + shift_right,
             data,
             to_be_copied );
      /* Update "data", "byteused" and "nbytes" values. */
      data += to_be_copied;
      buf->buf.bytesused += to_be_copied ;
      nbytes -= to_be_copied;
   }
   /* Complete the current frame if the buffer size was exceeded. */
   if (len > maxlen) {
      uvc_trace(UVC_TRACE_FRAME, "Frame complete (overflow).\n");
      buf->state = UVC_BUF_STATE_DONE;
   }
}
---
Poi salvate il file.

Dopo aver applicato la patch, prima del make va utilizzato sudo make menuconfig in modo da disattivare FireDTV and FloppyDTV

In pratica dando da terminale il comando sudo make menuconfig dovete navigare nel pannello di configurazione che appare seguendo questo percorso:
Multimedia support --->DVB/ATSC adapters  --->FireDTV and FloppyDTV
quando avete selezionato la voce FireDTV and FloppyDTV la disattivate col tasto N quindi premete sempre Esc e prima di uscire dalla configurazione confermate salvando la modifica.

Dopo questo potete procedere normalmente, dal terminale, posizionato nella cartella /v4l-dvb-83712d149893, lanciare
make
sudo make install
sudo make unload
sudo modprobe uvcvideo 

Codice: Seleziona tutto

-------------------------------- WARNING ---------------------------------------
 The USB Video Class driver has moved to http://linuxtv.org/.
 Using the Berlios SVN repository is now deprecated.
 Please check http://linux-uvc.berlios.de/ for download instructions.
 If you really want to compile this historical version, run 'make uvcvideo'.

Codice: Seleziona tutto

make
make -C /home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l 
make[1]: Entering directory `/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l'
creating symbolic links...
make -C firmware prep
make[2]: Entering directory `/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/firmware'
make[2]: Leaving directory `/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/firmware'
make -C firmware
make[2]: Entering directory `/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/firmware'
make[2]: Nothing to be done for `default'.
make[2]: Leaving directory `/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/firmware'
Kernel build directory is /lib/modules/2.6.31-15-generic/build
make -C /lib/modules/2.6.31-15-generic/build SUBDIRS=/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l  modules
make[2]: Entering directory `/usr/src/linux-headers-2.6.31-15-generic'
  CC [M]  /home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.o
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:1:21: error: too many decimal points in number
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:2:16: error: too many decimal points in number
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:3:48: error: invalid digit "9" in octal constant
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:4: error: stray '@' in program
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:4: error: stray '@' in program
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:4: error: stray '@' in program
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:4: error: stray '@' in program
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:6: error: expected identifier or '(' before '}' token
/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.c:8: error: expected identifier or '(' before '+' token
make[3]: *** [/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l/uvc_video.o] Error 1
make[2]: *** [_module_/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l] Error 2
make[2]: Leaving directory `/usr/src/linux-headers-2.6.31-15-generic'
make[1]: *** [default] Error 2
make[1]: Leaving directory `/home/andrea/Downloads/v4l-dvb-e0cd9a337600/v4l'
make: *** [all] Error 2
root@andrea-laptop:~/Downloads/v4l-dvb-e0cd9a337600# 

Codice: Seleziona tutto

sudo make menuconfig