Mercurial > vba-clojure

     1 #include <cmath>

     2 #include <cstdio>

     3 #include <string>

     4 #include <vector>

     5 

     6 /* Note: This module assumes everyone uses RGB15 as display depth */

     7 

     8 static std::string VIDEO_CMD =

     9     "mencoder - -o test0.avi"

    10     " -noskip -mc 0"

    11     " -ovc lavc"

    12     " -oac mp3lame"

    13     " -lameopts preset=256:aq=2:mode=3"

    14     " -lavcopts vcodec=ffv1:context=0:format=BGR32:coder=0:vstrict=-1"

    15     " >& mencoder.log";

    16 

    17 static void FlushWrite(FILE* fp, const unsigned char*buf, unsigned length);

    18 

    19 #define BGR24 (0x42475218)  // BGR24 fourcc

    20 #define BGR16 (0x42475210)  // BGR16 fourcc

    21 #define BGR15 (0x4247520F)  // BGR15 fourcc

    22 

    23 static FILE* (*openFunc)  (const char*, const char*) = NULL;

    24 static int (*closeFunc) (FILE*) = NULL;

    25 

    26 #if (defined(WIN32) || defined(win32)) // capital is standard, but check for either

    27  #include <cstdlib>

    28  #define popen _popen;

    29  #define pclose _pclose;

    30 #endif

    31 

    32 #define u32(n) (n)&255,((n)>>8)&255,((n)>>16)&255,((n)>>24)&255

    33 #define u16(n) (n)&255,((n)>>8)&255

    34 #define s4(s) s[0],s[1],s[2],s[3]

    35 

    36 static const unsigned FPS_SCALE = (0x1000000);

    37 

    38 // general-purpose A/V sync debugging, ignored unless explicitly enabled with NESVideoEnableDebugging

    39 static void (*debugVideoMessageFunc)(const char *msg) = NULL;

    40 static void (*debugAudioMessageFunc)(const char *msg) = NULL;

    41 // logo adds 1 "frame" to audio, so offset that (A/V frames shouldn't necessarily match up depending on the rates, but should at least make them start out matching in case they do)

    42 static unsigned audioFramesWritten=0, videoFramesWritten=1;

    43 static double audioSecondsWritten=0, videoSecondsWritten=0;

    44 

    45 

    46 static class AVI

    47 {

    48     FILE* avifp;

    49     

    50     bool KnowVideo;

    51     unsigned width;

    52     unsigned height;

    53     unsigned fps_scaled;

    54     std::vector<unsigned char> VideoBuffer;

    55     

    56     bool KnowAudio;

    57     unsigned rate;

    58     unsigned chans;

    59     unsigned bits;

    60     std::vector<unsigned char> AudioBuffer;

    61     

    62 public:

    63     AVI() :

    64         avifp(NULL),

    65         KnowVideo(false),

    66         KnowAudio(false)

    67     {

    68     }

    69     ~AVI()

    70     {

    71         if(avifp) closeFunc(avifp);

    72     }

    73     

    74     void Audio(unsigned r,unsigned b,unsigned c,

    75                const unsigned char*d, unsigned nsamples)

    76     {

    77         if(!KnowAudio)

    78         {

    79             rate = r;

    80             chans = c;

    81             bits = b;

    82             KnowAudio = true;

    83             CheckFlushing();

    84         }

    85         unsigned bytes = nsamples*chans*(bits/8);

    86 

    87 		if(debugAudioMessageFunc)

    88 		{

    89 			audioFramesWritten++;

    90 			audioSecondsWritten += (double)nsamples / (double)rate; // += bytes times seconds per byte

    91 			char temp [64];

    92 			sprintf(temp, "A: %.2lf s, %d f", audioSecondsWritten, audioFramesWritten);

    93 			debugAudioMessageFunc(temp);

    94 		}

    95 

    96         if(KnowVideo)

    97             SendAudioFrame(d, bytes);

    98         else

    99         {

   100             AudioBuffer.insert(AudioBuffer.end(), d, d+bytes);

   101             fprintf(stderr, "Buffering %u bytes of audio\n", bytes);

   102         }

   103     }

   104     void Video(unsigned w,unsigned h,unsigned f, const unsigned char*d)

   105     {

   106         if(!KnowVideo)

   107         {

   108             width=w;

   109             height=h;

   110             fps_scaled=f;

   111             KnowVideo = true;

   112             CheckFlushing();

   113         }

   114         

   115         unsigned bytes = width*height*2;

   116         

   117         //std::vector<unsigned char> tmp(bytes, 'k');

   118         //d = &tmp[0];

   119 

   120 		if(debugVideoMessageFunc)

   121 		{

   122 			videoFramesWritten++;

   123 			videoSecondsWritten += (double)FPS_SCALE / (double)fps_scaled; // += seconds per frame

   124 			char temp [64];

   125 			sprintf(temp, "V: %.2lf s, %d f", videoSecondsWritten, videoFramesWritten);

   126 			debugVideoMessageFunc(temp);

   127 		}

   128 

   129         if(KnowAudio)

   130             SendVideoFrame(d, bytes);

   131         else

   132         {

   133             VideoBuffer.insert(VideoBuffer.end(), d, d+bytes);

   134             fprintf(stderr, "Buffering %u bytes of video\n", bytes);

   135         }

   136     }

   137 

   138 private:

   139     void CheckFlushing()

   140     {

   141         //AudioBuffer.clear();

   142         //VideoBuffer.clear();

   143         

   144         if(KnowAudio && KnowVideo)

   145         {

   146             unsigned last_offs;

   147             

   148             // Flush Audio

   149             

   150             last_offs = 0;

   151             while(last_offs < AudioBuffer.size())

   152             {

   153                 unsigned bytes = rate / (fps_scaled / FPS_SCALE);

   154                 bytes *= chans*(bits/8);

   155                 

   156                 unsigned remain = AudioBuffer.size() - last_offs;

   157                 if(bytes > remain) bytes = remain;

   158                 if(!bytes) break;

   159                 

   160                 unsigned begin = last_offs;

   161                 last_offs += bytes;

   162                 SendAudioFrame(&AudioBuffer[begin], bytes);

   163             }

   164             AudioBuffer.erase(AudioBuffer.begin(), AudioBuffer.begin()+last_offs);

   165             

   166             // Flush Video

   167             

   168             last_offs = 0;

   169             while(last_offs < VideoBuffer.size())

   170             {

   171                 unsigned bytes  = width*height*2;

   172                 unsigned remain = VideoBuffer.size() - last_offs;

   173                 if(bytes > remain) bytes = remain;

   174                 if(!bytes)break;

   175                 

   176                 unsigned begin = last_offs;

   177                 last_offs += bytes;

   178                 SendVideoFrame(&VideoBuffer[begin], bytes);

   179             }

   180             VideoBuffer.erase(VideoBuffer.begin(), VideoBuffer.begin()+last_offs);

   181         }

   182     }

   183     

   184     void SendVideoFrame(const unsigned char* vidbuf, unsigned framesize)

   185     {

   186         CheckBegin();

   187         

   188         //fprintf(stderr, "Writing 00dc of %u bytes\n", framesize);

   189         

   190         const unsigned char header[] = { s4("00dc"), u32(framesize) };

   191         FlushWrite(avifp, header, sizeof(header));

   192         FlushWrite(avifp, vidbuf, framesize);

   193     }

   194 

   195     void SendAudioFrame(const unsigned char* audbuf, unsigned framesize)

   196     {

   197         CheckBegin();

   198         

   199         //fprintf(stderr, "Writing 01wb of %u bytes\n", framesize);

   200         

   201         const unsigned char header[] = { s4("01wb"), u32(framesize) };

   202         FlushWrite(avifp, header, sizeof(header));

   203         FlushWrite(avifp, audbuf, framesize);

   204     }

   205 

   206     void CheckBegin()

   207     {

   208         if(avifp) return;

   209         

   210 		if(!openFunc) openFunc = popen; // default

   211 		if(!closeFunc) closeFunc = pclose; // default

   212 

   213         avifp = openFunc(VIDEO_CMD.c_str(), "wb");

   214         if(!avifp) return;

   215 

   216         const unsigned fourcc = BGR16;

   217         const unsigned framesize = width*height*2;

   218         

   219         const unsigned aud_rate  = rate;

   220         const unsigned aud_chans = chans;

   221         const unsigned aud_bits  = bits;

   222 

   223         const unsigned nframes    = 0; //unknown

   224         const unsigned scale      = FPS_SCALE;

   225         const unsigned scaled_fps = fps_scaled;

   226         

   227         const unsigned SIZE_strh_vids = 4 + 4*2 + 2*2 + 8*4 + 2*4;

   228         const unsigned SIZE_strf_vids = 4*3 + 2*2 + 4*6;

   229         const unsigned SIZE_strl_vids = 4+ 4+(4+SIZE_strh_vids) + 4+(4+SIZE_strf_vids);

   230 

   231         const unsigned SIZE_strh_auds = 4 + 4*3 + 2*2 + 4*8 + 2*4;

   232         const unsigned SIZE_strf_auds = 2*2 + 4*2 + 2*3;

   233         const unsigned SIZE_strl_auds = 4+ 4+(4+SIZE_strh_auds) + 4+(4+SIZE_strf_auds);

   234         

   235         const unsigned SIZE_avih = 4*12;

   236         const unsigned SIZE_hdrl = 4+4+ (4+SIZE_avih) + 4 + (4+SIZE_strl_vids) + 4 + (4+SIZE_strl_auds);

   237         const unsigned SIZE_movi = 4 + nframes*(4+4+framesize);

   238         const unsigned SIZE_avi = 4+4+ (4+SIZE_hdrl) + 4 + (4+SIZE_movi);

   239         

   240         const unsigned char AVIheader[] =

   241         {

   242             s4("RIFF"),

   243             u32(SIZE_avi),

   244             s4("AVI "),   

   245             

   246             // HEADER

   247 

   248             s4("LIST"),   

   249             u32(SIZE_hdrl),

   250              s4("hdrl"),   

   251              

   252              s4("avih"),

   253              u32(SIZE_avih),

   254               u32(0),

   255               u32(0),

   256               u32(0),

   257               u32(0),

   258               u32(nframes),

   259               u32(0),

   260               u32(2), // two streams

   261               u32(0),

   262               u32(0),

   263               u32(0),

   264               u32(0),

   265               u32(0),

   266              

   267              // VIDEO HEADER

   268              

   269              s4("LIST"),

   270              u32(SIZE_strl_vids),

   271               s4("strl"),   

   272               

   273                s4("strh"),

   274                u32(SIZE_strh_vids),

   275                 s4("vids"),

   276                 u32(0),

   277                 u32(0),

   278                 u16(0),

   279                 u16(0),

   280                 u32(0),

   281                 u32(scale),

   282                 u32(scaled_fps),

   283                 u32(0),

   284                 u32(0),

   285                 u32(0),

   286                 u32(0),

   287                 u32(0),

   288                 u16(0),

   289                 u16(0),

   290                 u16(0),

   291                 u16(0),

   292                

   293                s4("strf"),

   294                u32(SIZE_strf_vids),

   295                 u32(0),

   296                 u32(width),

   297                 u32(height),

   298                 u16(0),

   299                 u16(0),

   300                 u32(fourcc),

   301                 u32(0),

   302                 u32(0),

   303                 u32(0),

   304                 u32(0),

   305                 u32(0),

   306              

   307              // AUDIO HEADER

   308              

   309              s4("LIST"),

   310              u32(SIZE_strl_auds),

   311               s4("strl"),   

   312               

   313                s4("strh"),

   314                u32(SIZE_strh_auds),

   315                 s4("auds"),

   316                 u32(0), //fourcc

   317                 u32(0), //handler

   318                 u32(0), //flags

   319                 u16(0), //prio

   320                 u16(0), //lang

   321                 u32(0), //init frames

   322                 u32(1), //scale

   323                 u32(aud_rate),

   324                 u32(0), //start

   325                 u32(0), //rate*length

   326                 u32(1048576), //suggested bufsize

   327                 u32(0), //quality

   328                 u32(aud_chans * (aud_bits / 8)), //sample size

   329                 u16(0), //frame size

   330                 u16(0),

   331                 u16(0),

   332                 u16(0),

   333                

   334                s4("strf"),

   335                u32(SIZE_strf_auds),

   336                 u16(1), // pcm format

   337                 u16(aud_chans),

   338                 u32(aud_rate),

   339                 u32(aud_rate * aud_chans * (aud_bits/8)), // samples per second

   340                 u16(aud_chans * (aud_bits/8)), //block align

   341                 u16(aud_bits), //bits

   342                 u16(0), //cbSize

   343 

   344             // MOVIE

   345 

   346             s4("LIST"),

   347             u32(SIZE_movi),

   348              s4("movi")

   349         };

   350           

   351         FlushWrite(avifp, AVIheader, sizeof(AVIheader));

   352     }

   353 } AVI;

   354 

   355 extern "C"

   356 {

   357     int LoggingEnabled = 0; /* 0=no, 1=yes, 2=recording! */

   358 

   359     const char* NESVideoGetVideoCmd()

   360     {

   361         return VIDEO_CMD.c_str();

   362     }

   363     void NESVideoSetVideoCmd(const char *cmd)

   364     {

   365         VIDEO_CMD = cmd;

   366     }

   367 	void NESVideoEnableDebugging( void videoMessageFunc(const char *msg), void audioMessageFunc(const char *msg) )

   368 	{

   369 		debugVideoMessageFunc = videoMessageFunc;

   370 		debugAudioMessageFunc = audioMessageFunc;

   371 	}

   372 	void NESVideoSetFileFuncs( FILE* open(const char *,const char *), int close(FILE*) )

   373 	{

   374 		openFunc = open;

   375 		closeFunc = close;

   376 	}

   377 

   378     void NESVideoLoggingVideo

   379         (const void*data, unsigned width,unsigned height,

   380          unsigned fps_scaled

   381         )

   382     {

   383         if(LoggingEnabled < 2) return;

   384         

   385         unsigned LogoFrames = fps_scaled >> 24;

   386 

   387         static bool First = true;

   388         if(First)

   389         {

   390             First=false;

   391             /* Bisqwit's logo addition routine. */

   392             /* If you don't have his files, this function does nothing

   393              * and it does not matter at all.

   394              */

   395             

   396             const char *background =

   397                 width==320 ? "logo320_240"

   398               : width==160 ? "logo160_144"

   399               : width==240 ? "logo240_160"

   400               : height>224 ? "logo256_240"

   401               :              "logo256_224";

   402             

   403             /* Note: This should be 1 second long. */

   404             for(unsigned frame = 0; frame < LogoFrames; ++frame)

   405             {

   406                 char Buf[4096];

   407                 sprintf(Buf, "/shares/home/bisqwit/povray/nesvlogo/%s_f%u.tga",

   408                     background, frame);

   409                 

   410                 FILE*fp = fopen(Buf, "rb");

   411                 if(!fp) // write blackness when missing frames to keep the intro 1 second long:

   412 				{

   413 			        unsigned bytes = width*height*2;

   414 					unsigned char* buf = (unsigned char*)malloc(bytes);

   415 					if(buf)

   416 					{

   417 						memset(buf,0,bytes);

   418 						AVI.Video(width,height,fps_scaled, buf);

   419 						if(debugVideoMessageFunc) videoFramesWritten--;

   420 						free(buf);

   421 					}

   422 				}

   423 				else // write 1 frame of the logo:

   424 				{

   425 					int idlen = fgetc(fp);

   426 					/* Silently ignore all other header data.

   427 					 * These files are assumed to be uncompressed BGR24 tga files with Y swapped.

   428 					 * Even their geometry is assumed to match perfectly.

   429 					 */

   430 					fseek(fp, 1+1+2+2+1+ /*org*/2+2+ /*geo*/2+2+ 1+1+idlen, SEEK_CUR);

   431 

   432 					bool yflip=true;

   433 					std::vector<unsigned char> data(width*height*3);

   434 					for(unsigned y=height; y-->0; )

   435 						fread(&data[y*width*3], 1, width*3, fp);

   436 					fclose(fp);

   437 	                

   438 					std::vector<unsigned short> result(width*height);

   439 					for(unsigned pos=0, max=result.size(); pos<max; ++pos)

   440 					{

   441 						unsigned usepos = pos;

   442 						if(yflip)

   443 						{

   444 							unsigned y = pos/width;

   445 							usepos = (usepos%width) + (height-y-1)*width;

   446 						}

   447 	                    

   448 						unsigned B = data[usepos*3+0];

   449 						unsigned G = data[usepos*3+1];

   450 						unsigned R = data[usepos*3+2];

   451 						result[pos] = ((B*31/255)<<0)

   452 									| ((G*63/255)<<5)

   453 									| ((R*31/255)<<11);

   454 					}

   455 					AVI.Video(width,height,fps_scaled, (const unsigned char*)&result[0]);

   456 					if(debugVideoMessageFunc) videoFramesWritten--;

   457 				}

   458             }

   459         }

   460         AVI.Video(width,height,fps_scaled,  (const unsigned char*) data);

   461     }

   462 

   463     void NESVideoLoggingAudio

   464         (const void*data,

   465          unsigned rate, unsigned bits, unsigned chans,

   466          unsigned nsamples)

   467     {

   468         if(LoggingEnabled < 2) return;

   469 

   470         static bool First = true;

   471         if(First)

   472         {

   473             First=false;

   474             

   475 			const unsigned n = rate; // assumes 1 second of logo to write silence for

   476             if(n > 0)

   477 			{

   478 				unsigned bytes = n*chans*(bits/8);

   479 				unsigned char* buf = (unsigned char*)malloc(bytes);

   480 				if(buf)

   481 				{

   482 					memset(buf,0,bytes);

   483 					AVI.Audio(rate,bits,chans, buf, n);

   484 					free(buf);

   485 				}

   486 			}

   487         }

   488         

   489         AVI.Audio(rate,bits,chans, (const unsigned char*) data, nsamples);

   490     }

   491 } /* extern "C" */

   492 

   493 

   494 

   495 static void FlushWrite(FILE* fp, const unsigned char*buf, unsigned length)

   496 {

   497 ///	unsigned failures = 0;

   498 ///	const static int FAILURE_THRESH = 8092; // don't want to loop infinitely if we keep failing to make progress - actually maybe you would want this, so the checking is disabled

   499     while(length > 0 /*&& failures < FAILURE_THRESH*/)

   500     {

   501         unsigned written = fwrite(buf, 1, length, fp);

   502 ///		if(written == 0)

   503 ///			failures++;

   504 ///		else

   505 ///		{

   506 			length -= written;

   507 			buf += written;

   508 ///			failures = 0;

   509 ///		}

   510     }

   511 ///	if(failures >= FAILURE_THRESH)

   512 ///	{

   513 ///		fprintf(stderr, "FlushWrite() failed to write %d bytes %d times - giving up.", length, failures);

   514 ///		LoggingEnabled = 0;

   515 ///	}

   516 }

   517 

   518 // for the UB tech

   519 #undef BGR24

   520 #undef BGR16

   521 #undef BGR15

   522 

   523 #undef u32

   524 #undef u16

   525 #undef s4
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 01 Sep 2012 09:35:07 -0500
parents	f9f4f1b99eed
children