src/projectM-xmms/main.cpp

/* 
projectM v1.01 - xmms-projectm.sourceforge.net
--------------------------------------------------

Lead Developers:  Carmelo Piccione (carmelo.piccione@gmail.com) &
                  Peter Sperl (peter@sperl.com)

We have also been advised by some professors at CMU, namely Roger B. Dannenberg.
http://www-2.cs.cmu.edu/~rbd/    
  
The inspiration for this program was Milkdrop by Ryan Geiss. Obviously. 

This code is distributed under the GPL.


THANKS FOR THE CODE!!!
-------------------------------------------------
The base for this program was andy@nobugs.org's XMMS plugin tutorial
http://www.xmms.org/docs/vis-plugin.html

We used some FFT code by Takuya OOURA instead of XMMS' built-in fft code
fftsg.c - http://momonga.t.u-tokyo.ac.jp/~ooura/fft.html

and some beat detection code was inspired by Frederic Patin @
www.gamedev.net/reference/programming/features/beatdetection/

*/

#include <stdio.h>
#include <xmms/plugin.h>
#include <string.h>
#include <string>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <xmms/util.h>
#include <SDL/SDL.h>
#include <SDL/SDL_thread.h>

#include <xmms/xmmsctrl.h>
#include <math.h>
#include "ConfigFile.h"

#include <projectM.hpp>

#include "sdltoprojectM.h"
#include "video_init.h"

#include <GL/gl.h>
#define CONFIG_FILE "/share/projectM/config.inp"

// Forward declarations 
extern "C" void projectM_xmms_init(void); 
extern "C" void projectM_cleanup(void);
extern "C" void projectM_about(void);
extern "C" void projectM_configure(void);
extern "C" void projectM_playback_start(void);
extern "C" void projectM_playback_stop(void);
extern "C" void projectM_render_pcm(gint16 pcm_data[2][512]);
extern "C" void projectM_render_freq(gint16 pcm_data[2][256]);
extern "C" int worker_func(void*);
extern "C" VisPlugin *get_vplugin_info();
std::string read_config();
void saveSnapshotToFile();
//extern preset_t * active_preset;

//FILE * debugFile = fopen("./dwrite-dump", "wb");

// Callback functions
VisPlugin projectM_vtable = {
  NULL, // Handle, filled in by xmms
  NULL, // Filename, filled in by xmms
  0,                     // Session ID
  (char*)"projectM v2.00",       // description
  2, // # of PCM channels for render_pcm()
  0, // # of freq channels wanted for render_freq()
  projectM_xmms_init,     // Called when plugin is enabled
  projectM_cleanup,        // Called when plugin is disabled
  projectM_about,          // Show the about box
  projectM_configure,      // Show the configure box
  NULL,                     // Called to disable plugin, filled in by xmms
  projectM_playback_start, // Called when playback starts
  projectM_playback_stop,  // Called when playback stops
  projectM_render_pcm,      // Render the PCM data, must return quickly
  projectM_render_freq     // Render the freq data, must return quickly
};

// XMMS entry point
extern "C" VisPlugin *get_vplugin_info(void)
{
  return &projectM_vtable;
}

// Our worker thread
SDL_Thread *worker_thread;
SDL_sem *sem;
SDL_Event event;

SDL_Surface *screen;


projectM * globalPM = NULL;

int maxsamples=512;

int texsize=512;
int gx=32,gy=24;
int wvw=400,wvh=400;
int fvw=1024,fvh=768;
int fps=35, fullscreen=0;

// char *title;

gint disable_projectm(void *something) {
	projectM_vtable.disable_plugin(&projectM_vtable);
	return 0;
}

Uint32 get_xmms_title(Uint32 something, void *somethingelse) {
	static char check_title = 1;
	static int last_pos;
	static char *last_title = NULL;
	int pos;
	char *title = NULL;

	//Nice optimization, but we want the title no matter what so I can display it when the song changes
#if 0
	if(!(globalPM->showtitle%2)) {
		/* Repeat less often when not showing title */
		return 1000;
	}
#endif

	pos = xmms_remote_get_playlist_pos(projectM_vtable.xmms_session);
	/* Only check every 1 second for title change, otherwise check pos */
	if(check_title || pos != last_pos) {
		title = xmms_remote_get_playlist_title(
				projectM_vtable.xmms_session, pos);
		if(title && (!last_title || strcmp(last_title,title))) {
		  //globalPM->renderer->title = title;
			//globalPM->renderer->drawtitle = 1;

		  std::string titlepp(title);
		  globalPM->projectM_setTitle(titlepp);
			g_free(last_title);
			last_title = title;
		} else if(title && last_title != title) {
			/* New copy of last title */
			g_free(title);
		}
		check_title = !check_title;
	}
	last_pos = pos;
	/* Repeat every 500ms */
	return 500;
}

int capture = 0;

int worker_func(void*)
{ 
// char projectM_data[1024]; 
 SDL_TimerID title_timer = NULL;
 std::string config_file;
 config_file = read_config();
 ConfigFile config(config_file);

 int wvw = config.read<int>( "Window Width", 512 );
 int wvh = config.read<int>( "Window Height", 512 );

 int fullscreen = 0;
 if (config.read("Fullscreen", true)) fullscreen = 1;
      else fullscreen = 0;

  init_display(wvw,wvh,&fvw,&fvh,fullscreen); 
  SDL_WM_SetCaption("projectM v1.00", "projectM v1.00");

  /** Initialise projectM */
    
  globalPM = new projectM(config_file);
  SDL_SemPost(sem);
  title_timer = SDL_AddTimer(500, get_xmms_title, NULL);
    /** Initialise the thread */
  // SDL_SemTryWait(sem);
  while ( SDL_SemValue(sem)==1 ) {
        projectMEvent evt;
        projectMKeycode key;
        projectMModifier mod;

        /** Process SDL events */
        SDL_Event event;
        while ( SDL_PollEvent( &event ) ) {
            /** Translate into projectM codes and process */
            evt = sdl2pmEvent( event );	  

            key = sdl2pmKeycode( event.key.keysym.sym );
            mod = sdl2pmModifier( event.key.keysym.mod );

            if ( evt == PROJECTM_KEYDOWN ) {
	   
	      if(key == PROJECTM_K_c)
		{
		  //SDL_SaveBMP(screen, "/home/pete/1.bmp");
		  saveSnapshotToFile();
		}
	      if(key == PROJECTM_K_v)
		{
		  // capture++;
		}
	      if(key == PROJECTM_K_f)
		{
		 

		 int w, h;
                    if (fullscreen == 0) {
                        w = fvw;
                        h = fvh;
			fullscreen = 1;
                    } else {
                        w = wvw;
                        h = wvh;
			fullscreen = 0;
                    }
                  
                    resize_display(w, h, fullscreen);
                    globalPM->projectM_resetGL( w, h ); 
                }
	      else  globalPM->key_handler(evt,key,mod);

              }
	    else if ( evt == PROJECTM_VIDEORESIZE )
	      {

	       

		wvw=event.resize.w;
		wvh=event.resize.h;
	       
		
		resize_display(wvw,wvh,fullscreen);
		globalPM->projectM_resetGL( wvw, wvh ); 
 
              } 
	    else if ( evt == PROJECTM_VIDEOQUIT ) {
	      
	      (void) gtk_idle_add (disable_projectm, NULL);
	    }
	}
	
        /** Add the waveform data */
      

        /** Render the new frame */
	//	 strcpy(title,xmms_remote_get_playlist_title(projectM_vtable.xmms_session, xmms_remote_get_playlist_pos(projectM_vtable.xmms_session))); 

	 //printf("%s\n",title);
	// strcpy(globalPM->title,title);
	
	  globalPM->renderFrame();
	
      

        SDL_GL_SwapBuffers();

	if (capture % 2 == 1) saveSnapshotToFile();
	//	SDL_SemPost(sem);
      }

 if(title_timer) 
  	SDL_RemoveTimer(title_timer);
 delete globalPM;


 return 0;
}

extern "C" void projectM_xmms_init(void) 
{
  
  /* First, initialize SDL's video subsystem. */
 // std::cerr << "sdl init begin" << std::endl;  
  if( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_TIMER ) < 0 ) {
    /* Failed, exit. */
    fprintf( stderr, "Video initialization failed: %s\n",
             SDL_GetError( ) );
    //projectM_vtable.disable_plugin (&projectM_vtable);
    return;
    
  }
  sem = SDL_CreateSemaphore(0);
 // printf("projectM plugin: Initializing\n");
 
  SDL_EnableUNICODE(1);
  
  worker_thread = SDL_CreateThread ( *worker_func, NULL);
 
}



extern "C" void projectM_cleanup(void)
{

  SDL_SemWait(sem);
  SDL_WaitThread(worker_thread, NULL);
  // SDL_KillThread(worker_thread);
  //printf("killed thread\n");

  SDL_DestroySemaphore(sem);
    //printf("Destroy Mutex\n");
  SDL_Quit();
  
 // printf("projectM plugin: Cleanup completed\n");
}
extern "C" void projectM_about(void)
{
  printf("projectM plugin: About\n");
}
extern "C" void projectM_configure(void)
{
  printf("projectM plugin: Configure\n");
}
extern "C" void projectM_playback_start(void)
{//thread_control = GO;
  printf("projectM plugin: Playback starting\n");
}
extern "C" void projectM_playback_stop(void)
{//thread_control = STOP;
  printf("projectM plugin: Playback stopping\n");
}
extern "C" void projectM_render_pcm(gint16 pcm_data[2][512])
{
  //SDL_mutexP(mutex); while ( SDL_SemValue(sem)==1 )
  if ( SDL_SemValue(sem)==1 )
        globalPM->pcm()->addPCM16(pcm_data);
	 
       	//SDL_mutexV(mutex);
	
}

extern "C" void projectM_render_freq(gint16 freq_data[2][256])
{
  printf("NO GOOD\n");
 }

std::string read_config()
{

//   int n;
   
   char num[512];
   FILE *in; 
   FILE *out;

   char* home;
   char projectM_home[1024];
   char projectM_config[1024];

   strcpy(projectM_config, PROJECTM_PREFIX);
   strcpy(projectM_config+strlen(PROJECTM_PREFIX), CONFIG_FILE);
   projectM_config[strlen(PROJECTM_PREFIX)+strlen(CONFIG_FILE)]='\0';
   //printf("dir:%s \n",projectM_config);
   home=getenv("HOME");
   strcpy(projectM_home, home);
   strcpy(projectM_home+strlen(home), "/.projectM/config.inp");
   projectM_home[strlen(home)+strlen("/.projectM/config.inp")]='\0';

  
 if ((in = fopen(projectM_home, "r")) != 0) 
   {
     //printf("reading ~/.projectM/config.inp \n");
     fclose(in);
     return std::string(projectM_home);
   }
 else
   {
     printf("trying to create ~/.projectM/config.inp \n");

     strcpy(projectM_home, home);
     strcpy(projectM_home+strlen(home), "/.projectM");
     projectM_home[strlen(home)+strlen("/.projectM")]='\0';
     mkdir(projectM_home,0755);

     strcpy(projectM_home, home);
     strcpy(projectM_home+strlen(home), "/.projectM/config.inp");
     projectM_home[strlen(home)+strlen("/.projectM/config.inp")]='\0';

     if((out = fopen(projectM_home,"w"))!=0)
       {
	
	 if ((in = fopen(projectM_config, "r")) != 0) 
	   {

	     while(fgets(num,80,in)!=NULL)
	       {
		 fputs(num,out);
	       }
	     fclose(in);
	     fclose(out);
	    

	     if ((in = fopen(projectM_home, "r")) != 0) 
	       { 
		 printf("created ~/.projectM/config.inp successfully\n");  
		 fclose(in);
		 return std::string(projectM_home);
	       }
	     else{printf("This shouldn't happen, using implementation defualts\n");abort();}
	   }
	 else{printf("Cannot find projectM default config, using implementation defaults\n");abort();}
       }
     else
       {
	 printf("Cannot create ~/.projectM/config.inp, using default config file\n");
	 if ((in = fopen(projectM_config, "r")) != 0) 
	   { printf("Successfully opened default config file\n");
	     fclose(in);
	     return std::string(projectM_config);}
	 else{ printf("Using implementation defaults, your system is really messed up, I'm suprised we even got this far\n");  abort();}
       }

   }

 abort();
}

int frame = 1;


void saveSnapshotToFile()
{
  char dumpPath[512];
  char Home[512];
  //char *home;
  
  SDL_Surface *	bitmap;
  
  GLint		viewport[4];
  long		bytewidth;
  GLint		width, height;
  long		bytes;
  
  glReadBuffer(GL_FRONT);
  glGetIntegerv(GL_VIEWPORT, viewport);
  
  width = viewport[2];
  height = viewport[3];
            
  bytewidth = width * 4;
  bytewidth = (bytewidth + 3) & ~3;
  bytes = bytewidth * height;
  
  /*
    glFinish();
    glPixelStorei(GL_PACK_ALIGNMENT, 4);
    glPixelStorei(GL_PACK_ROW_LENGTH, 0);
    glPixelStorei(GL_PACK_SKIP_ROWS, 0);
    glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
  */
  
  
  bitmap = SDL_CreateRGBSurface(SDL_SWSURFACE, width,  height, 32,0,0,0,0);
  glReadPixels(0, 0, width, height,
	       GL_BGRA,
	       GL_UNSIGNED_INT_8_8_8_8_REV,
	       bitmap->pixels);
  
  sprintf(dumpPath, "/.projectM/%.8d.bmp", frame++);
  // home=getenv("HOME");
  strcpy(Home, getenv("HOME"));
  strcpy(Home+strlen(Home), dumpPath);
  Home[strlen(Home)]='\0';
  SDL_SaveBMP(bitmap, Home);
     
  SDL_FreeSurface(bitmap);
 
       
}