Blinken xmms

blinken_xmms

Das blinken_xmms ist ein Spectrum-Analyser-Plugin für den Multimedia Player Xmms. Es sendet UDP-Pakete an 127.0.0.1:2323 im EBLP - extended Blinkenlights protocol mit 8x18 Pixeln. Die Ausgabe kann z.B. mit lldrv auf ein BlinkenLEDsPro umgeleitet werden.

Blinkt zu D&B Musik; erstellt mit blm2gif

(Graustufen werden leider nicht konvertiert)

Quellcode

Den Quellcode für das XMMS-Plugin habe ich mit Hilfe von Workshop: Vis-Plugins in XMMS und XMMS Plugin tutorial at nobugs.org erstellen können. Desweiteren waren Informationen zum EBLP - extended Blinkenlights protocol sehr nützlich. Der "Rechen-Kern" für die Visualisierung entspricht dem des spectrum Plugins.

Jetzt mit Graustufen!

blinken_xmms.c ! Beim Speichern --> Dateiname: blinken_xmms.c !

<highlightSyntax language="c">

/* BLINKEN_XMMS : for XMMS - Cross-platform multimedia player
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License forore details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with XMMS.
*/

/* Compile:
 *  gcc -Wall --shared `xmms-config --cflags` -o blinken_xmms.so blinken_xmms.c
 * Install:
 *  install blinken_plugin.so `xmms-config --visualization-plugin-dir`
*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <xmms/plugin.h>

#define NUM_BANDS 18
#define WIDTH     18
#define HEIGHT     8

#define MSG  {0xFE,0xED,0xBE,0xEF,0x00,0x00,0x00,0x00,0x00,0x012,0x00,0x08,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00,\
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}

static int sock;
static unsigned char msg[156]=MSG;
static unsigned char scalmsg[10] = {0x11, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0xAA, 0xCC, 0x00};

static gdouble scale;
static gint16 bar_heights[NUM_BANDS];

void our_init();
void our_cleanup();
void our_playback_start();
void our_playback_stop();
void our_render_freq(gint16 data[1][256]);

VisPlugin g_our_plugin =
{
  NULL,               /* handle */
  NULL,               /* filename */
  0,                  /* session id */
  "blinken_xmms",     /* description */
  0,                  /* PCM Channels */
  1,                  /* Freq. Channels */
  /* Callbacks ...    */
  our_init,           /* init */
  our_cleanup,        /* cleanup */
  NULL,               /* about-dialog */
  NULL,               /* configure-dialog */
  NULL,               /* disable-plugin */
  our_playback_start, /* playback-start */
  our_playback_stop,  /* playback-top */
  NULL,               /* render-pcm */
  our_render_freq     /* render-freq */
};

VisPlugin *get_vplugin_info(void)
{
  return( & g_our_plugin);
}

void our_init()
{
  if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
  {
    printf("couldn't create socket");
    our_cleanup(); // programm mit fehlercode 1 beenden
    exit(1);
  }

  // Struktur anlegen, mit Nullen initialisieren und füllen
  struct sockaddr_in dest_addr;
  memset(&dest_addr, 0, sizeof(dest_addr));           // alles mit Nullen fuellen
  dest_addr.sin_family      = AF_INET;                // muss hier nochmal stehen
  dest_addr.sin_port        = htons(2323);            // auf dem Port sollte UDP laufen
  dest_addr.sin_addr.s_addr = inet_addr("127.0.0.1"); // IP Adresse von 'localhost'

  if (connect(sock, (struct sockaddr*) &dest_addr, sizeof(dest_addr)) == -1)
  {
    printf("couldn't connect to 127.0.0.1:2323");
    our_cleanup();
    exit(2); // mit fehlercode aussteigen
  }

  send(sock, msg, 156, 0); // senden
  scale = (HEIGHT + 1)/ log(256);
}

void our_cleanup()
{
  close(sock); // wir schliessen den descriptor wieder
}

void our_playback_start()
{
  /*printf( "playback_start\n");*/
}

void our_playback_stop()
{
  unsigned char msg[156]=MSG;
  send(sock, msg, 156, 0);
}

void our_render_freq( gint16 data[1][256])
{
  int result,zeile,spalte;
  int i,j,c;
  gint y;
  gint xscale[NUM_BANDS] = {0, 1, 2, 3, 5, 7, 10, 14, 20, 28, 40, 54, 74, 85, 101, 137, 140, 150};

  for(i = 0; i < NUM_BANDS; i++)
  {
    for(c = xscale[i], y = 0; c < xscale[i + 1]; c++)
    {
      if(data[0][c] > y)
      {
        y = data[0][c];
      }

    }

    y >>= 7;
    if(y != 0)
    {
      y = (gint)(log(y) * scale);
      if(y > HEIGHT+1)
      {
        y = HEIGHT+1;
      }

    }

    bar_heights[i] = -y+9;

  }

  spalte = 0;
  zeile  = 0;
  for(i=12;i<=155;i++)
  {
    j = i-12;
    zeile  = j/18;
    spalte = j%18;

    if((bar_heights[spalte])==zeile+1)
    {
      msg[i]=0xFF;
    }
    else if((bar_heights[spalte])<zeile+1)
    {
      msg[i]=scalmsg[bar_heights[spalte]];
    }
    else
    {
      msg[i]=0x00;
    }

  }

  result = send(sock, msg, 156, 0);
  return;
}

</highlightSyntax>

Installation

gcc -Wall --shared `xmms-config --cflags` -o blinken_xmms.so blinken_xmms.c

install blinken_plugin.so `xmms-config --visualization-plugin-dir`

Evtl. ist das dev. Paket von xmms erforderlich.

Nun kann man mit einem Rechtsklick auf das XMMS-Fenster im Menü: Visualisierung-->Visualisierungs-Plugins

blinken-xmms

auswählen. Um den UDP-Stream umzuleiten kann z.B

./BlinkenOutput -l 2323 -d /dev/lldrv

benutzt werden.

Test

<highlightSyntax remoteFile="http://www.s23.org/w/images/f/f9/Blinken_xmms.c.txt" language="c"></highlightSyntax>

<tasks> [3] Fix "highlightSyntax remoteFile" (mutante) </tasks>

The relevant code snippet

Here is the relevant code snippet from syntaxHighlightExtension.php. Do you see a problem?

<highlightSyntax language="php3">

/**
        * If its a remote file, open it up and parse the returned contents.
        */
       } else if($argv["remoteFile"]){
               $openFileName = $argv["remoteFile"];
               $fp = fopen($openFileName, "r");
               if(!$fp){
                       $output = "Error: Syntax Highlighter could not open the file ".$openFileName."
";
               } else {
                       $fileContents = fread($fp, 8096);
                       fclose($fp);

$output .= "

Code from <a href=\"".$argv["remoteFile"]."\">".$argv["remoteFile"]."</a>

\n";
                        $output .= $highlighter->highlight_text($fileContents);
                        $output .= "

";

               }
               return $output;
       /**
        * Else we just want to highlight the code within the syntaxHighlight tags.
        */
       } else {

</highlightSyntax>

Links

download source

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