avi2swf/videoreader_vfw.cc

   1 /* videoreader_vfw.cc
   2    Read avi files using Video For Windows (vfw).
   3
   4    Part of the swftools package.
   5
   6    Copyright (c) 2004 Matthias Kramm <kramm@quiss.org>
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  21
  22 #ifdef WIN32
  23 #include <windows.h>
  24 #include <vfw.h>
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include "videoreader.h"
  28
  29 typedef struct _videoreader_vfw_internal {
  30     //video:
  31     PAVISTREAM vs;
  32     //audio:
  33     PAVISTREAM as;
  34
  35     PGETFRAME getframe;
  36     IAVIFile* avifile;
  37     BITMAPINFOHEADER bitmap;
  38     WAVEFORMATEX waveformat;
  39
  40     int video_pos;
  41     int video_end;
  42
  43     int audio_pos;
  44     int audio_end;
  45
  46     float fps;
  47     int width,height;
  48
  49     int samplerate;
  50     int channels;
  51
  52 } videoreader_vfw_internal_t;
  53
  54 static int avifile_initialized = 0;
  55
  56 #define _TRACE_ {printf("%s: %d (%s)\n",__FILE__,__LINE__,__func__);fflush(stdout);}
  57
  58 bool videoreader_vfw_eof(videoreader_t* vr)
  59 {
  60     videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
  61     return (i->video_pos >= i->video_end);
  62 }
  63
  64 static int bitmap_to_rgba(BITMAPINFOHEADER*bi, void*buffer, const int dest_width, const int dest_height)
  65 {
  66     UCHAR*data = (UCHAR*)(bi+1); // actual bitmap data starts after the header
  67
  68     if(bi->biPlanes!=1 || bi->biCompression!=0 || bi->biBitCount%4!=0) {
  69         /* unsupported format */
  70         fprintf(stderr, "bitmap_to_rgba: unsupported format: biPlanes=%d, biCompression=%d biBitCount=%d\n",
  71                 bi->biPlanes, bi->biCompression, bi->biBitCount);
  72         return 0;
  73     }
  74
  75     ULONG*dest = (ULONG*)buffer;
  76
  77     int width = bi->biWidth;
  78     int height = bi->biHeight;
  79     if(dest_width != width || dest_height != height) {
  80         /* TODO: size conversion */
  81         fprintf(stderr, "size mismatch: %dx%d != %dx%d\n", width, height, dest_width, dest_height);
  82         return 0;
  83     }
  84
  85     /* convert the various image types to RGBA-
  86        TODO: is there some way to let the Windows API do this? */
  87     int bytesperpixel = ((bi->biWidth*bi->biBitCount)+7)&~7;
  88     int linex = ((bytesperpixel/8)+3)&~3;
  89     memset(dest, 255, dest_width*dest_height*4);//pre-fill alpha channel
  90     if(bi->biBitCount==1) {
  91         int y;
  92         UCHAR*img = data;
  93         for(y=0;y<dest_height;y++) {
  94             UCHAR*line = &img[linex*y];
  95             int x;
  96             for(x=0;x<dest_width;x++) {
  97                 *dest++ = 255*((line[x/8]>>(x&7))&1);
  98             }
  99         }
 100     } else if(bi->biBitCount==4) {
 101         int y;
 102         UCHAR*img = &data[bi->biClrUsed*4];
 103         UCHAR*pal = data;
 104         for(y=0;y<dest_height;y++) {
 105             UCHAR*line = &img[linex*y];
 106             int x;
 107             for(x=0;x<dest_width/2;x++) {
 108                 *dest++ = 255|pal[(line[0]>>4)<<2|0]<<8|pal[(line[0]>>4)<<2|1]<<16|pal[(line[0]>>4)<<2|2]<<24;
 109                 *dest++ = 255|pal[(line[0]&0x0f)<<2|0]<<8|pal[(line[0]&0x0f)<<2|1]<<16|pal[(line[0]&0x0f)<<2|2]<<24;
 110                 line++;
 111             }
 112         }
 113     } else if(bi->biBitCount==8) {
 114         int y;
 115         UCHAR*img = &data[bi->biClrUsed*4];
 116         UCHAR*pal = data;
 117         for(y=0;y<dest_height;y++) {
 118             UCHAR*line = &img[linex*y];
 119             int x;
 120             for(x=0;x<dest_width;x++) {
 121                 *dest++ = 255|pal[line[0]*4+2]<<8|pal[line[0]*4+1]<<16|pal[line[0]*4+0]<<24;
 122                 line++;
 123             }
 124         }
 125     } else if(bi->biBitCount==24) {
 126         UCHAR*img = data;
 127         int y;
 128         for(y=0;y<dest_height;y++) {
 129             UCHAR*line = &img[linex*y];
 130             int x;
 131             for(x=0;x<dest_width;x++) {
 132                 *dest++ = 255|line[2]<<8|line[1]<<16|line[0]<<24;
 133                 line+=3;
 134             }
 135         }
 136     } else if(bi->biBitCount==32) {
 137         UCHAR*img = data;
 138         int y;
 139         for(y=0;y<dest_height;y++) {
 140             UCHAR*line = &img[linex*y];
 141             int x;
 142             for(x=0;x<dest_width;x++) {
 143                 *dest++ = 255|line[0]<<8|line[1]<<16|line[2]<<24;
 144                 line+=4;
 145             }
 146         }
 147     } else {
 148         fprintf(stderr, "Unsupported format: bitcount=%d\n", bi->biBitCount);
 149         return 0;
 150     }
 151     return 1;
 152 }
 153
 154 int videoreader_vfw_getimage(videoreader_t* vr, void*buffer)
 155 {
 156     videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
 157
 158     if(videoreader_vfw_eof(vr))
 159         return 0;
 160
 161     LPBITMAPINFOHEADER bi;
 162     bi = (LPBITMAPINFOHEADER)AVIStreamGetFrame(i->getframe, i->video_pos);
 163
 164     i->video_pos++;
 165
 166     if(!bi) {
 167         fprintf(stderr, "AVIStreamGetFrame failed\n");
 168         return 0;
 169     }
 170     printf("%dx%d:%d\n", bi->biWidth, bi->biHeight, bi->biBitCount);
 171
 172     if(!bitmap_to_rgba(bi, buffer, i->width, i->height)) {
 173         fprintf(stderr, "couldn't convert bitmap to RGBA.\n");
 174         return 0;
 175     }
 176     return i->width*i->height*4;
 177 }
 178
 179 static int readAudioBlock(videoreader_vfw_internal_t* i, void*buf, int len)
 180 {
 181     LONG bytes;
 182     LONG samples;
 183     AVIStreamRead(i->as, i->audio_pos, len/(2*i->waveformat.nChannels), buf, len, &bytes, &samples);
 184     i->audio_pos += samples;
 185     return bytes;
 186 }
 187
 188 int videoreader_vfw_getsamples(videoreader_t* vr, void*buf, int num)
 189 {
 190     videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
 191
 192     switch(i->waveformat.wBitsPerSample) {
 193         case 1: {
 194             int len = readAudioBlock(i, buf, num);
 195             int t = len-1;
 196             do {
 197                 ((SHORT*)buf)[t] = ((((BYTE*)buf)[t>>3])>>(t&7))<<15;
 198             } while(--t>=0);
 199             return len*8;
 200         }
 201         case 8: {
 202             int len = readAudioBlock(i, buf, num);
 203             int t = len-1;
 204             do {
 205                 ((SHORT*)buf)[t] = (((BYTE*)buf)[t]<<8)^0x8000;
 206             } while(--t>=0);
 207             return len*2;
 208         }
 209         case 16: {
 210             return readAudioBlock(i, buf, num);
 211         }
 212         default: {
 213             return 0;
 214         }
 215     }
 216 }
 217
 218 void videoreader_vfw_close(videoreader_t* vr)
 219 {
 220     videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)vr->internal;
 221
 222     AVIStreamGetFrameClose(i->getframe);
 223     if(i->vs) {
 224         AVIStreamRelease(i->vs); i->vs = 0;
 225     }
 226     if(i->as) {
 227         AVIStreamRelease(i->as); i->vs = 0;
 228     }
 229     AVIFileRelease(i->avifile); i->avifile = 0;
 230
 231     AVIFileExit(); avifile_initialized=0;
 232
 233     free(vr->internal); vr->internal = 0;
 234 }
 235
 236 void videoreader_vfw_setparameter(videoreader_t* vr, char*name, char*value) {}
 237
 238 int videoreader_vfw_open(videoreader_t* vr, char* filename)
 239 {
 240     memset(vr, 0, sizeof(videoreader_t));
 241     if(!filename) {
 242         /* codec query */
 243         return 1;
 244     }
 245
 246     videoreader_vfw_internal_t* i = (videoreader_vfw_internal_t*)malloc(sizeof(videoreader_vfw_internal_t));
 247     memset(i, 0, sizeof(videoreader_vfw_internal_t));
 248
 249     vr->internal = i;
 250     vr->eof = videoreader_vfw_eof;
 251     vr->getimage = videoreader_vfw_getimage;
 252     vr->getsamples = videoreader_vfw_getsamples;
 253     vr->close = videoreader_vfw_close;
 254     vr->setparameter = videoreader_vfw_setparameter;
 255
 256     if(!avifile_initialized) {
 257         AVIFileInit();
 258     }
 259     if(AVIFileOpen(&i->avifile, filename, OF_SHARE_DENY_WRITE, 0)) {
 260         fprintf(stderr, "Couldn't open %s\n", filename);
 261         return -1;
 262     }
 263     AVIFILEINFO info;
 264     AVIFileInfo(i->avifile, &info, sizeof(info));
 265
 266     /* calculate framerate */
 267     i->fps = (double)info.dwRate/(double)info.dwScale;
 268
 269     unsigned int t=0;
 270     while(t<info.dwStreams) {
 271         PAVISTREAM stream;
 272         if(AVIFileGetStream(i->avifile, &stream, streamtypeANY, t) != AVIERR_OK || !stream)
 273             break; //video_end of (working) streams
 274
 275         AVISTREAMINFO streaminfo;
 276         AVIStreamInfo(stream, &streaminfo, sizeof(streaminfo));
 277
 278         if (streaminfo.fccType == streamtypeVIDEO) {
 279             /* video stream */
 280
 281             BITMAPINFOHEADER bitmap;
 282             LONG size = sizeof(i->bitmap);
 283             AVIStreamReadFormat(stream, 0, &bitmap, &size);
 284
 285             if(i->bitmap.biCompression == 0/*RGB*/) {
 286                 i->bitmap = bitmap;
 287                 i->vs = stream;
 288                 i->width = bitmap.biWidth;
 289                 i->height = bitmap.biHeight;
 290             }
 291         }
 292         else if (streaminfo.fccType == streamtypeAUDIO) {
 293             /* audio stream */
 294
 295             WAVEFORMATEX waveformat;
 296             LONG size = sizeof(i->waveformat);
 297             AVIStreamReadFormat(stream, 0, &waveformat, &size);
 298
 299             if(i->waveformat.wBitsPerSample == 16 || i->waveformat.wBitsPerSample == 8) {
 300                 i->waveformat = waveformat;
 301                 i->as = stream;
 302                 i->channels = i->waveformat.nChannels;
 303                 i->samplerate = i->waveformat.nSamplesPerSec;
 304             }
 305         }
 306         t++;
 307     }
 308
 309     if(i->vs) {
 310         vr->width = i->width;
 311         vr->height = i->height;
 312         vr->fps = i->fps;
 313     } else {
 314         fprintf(stderr, "AVIReader: Warning: No video stream\n");
 315     }
 316     if(i->as) {
 317         vr->channels = i->channels;
 318         vr->samplerate = i->samplerate;
 319     } else {
 320         fprintf(stderr, "AVIReader: Warning: No audio stream\n");
 321     }
 322
 323     i->getframe = AVIStreamGetFrameOpen(i->vs, 0);
 324     if(!i->getframe) {
 325         return -1;
 326     }
 327
 328     i->video_pos = AVIStreamStart(i->vs);
 329     i->video_end = AVIStreamEnd(i->vs);
 330     i->audio_pos = 0;
 331     i->audio_end = 0x7fffffff;
 332
 333     return 0;
 334 }
 335
 336 #else //WIN32
 337
 338 int videoreader_vfw_open(videoreader_t* vr, char* filename)
 339 {
 340     return -1;
 341 }
 342
 343 #endif //WIN32
 344