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avi.c

/**
 * avi.c
 *
 * This is external code.
 *
 * $Id: avi.c,v 1.3 2002/11/25 12:01:51 mein Exp $ 
 *
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 *
 */

#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdio.h>
#include <ctype.h>

#include "AVI_avi.h"
#include "avi_intern.h"

#include "endian.h"

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

static int AVI_DEBUG=0;
static char DEBUG_FCC[4];

#define DEBUG(x) if(AVI_DEBUG) printf("AVI DEBUG: " x);

/* local functions */
char *fcc_to_char (unsigned int fcc);
char *tcc_to_char (unsigned int tcc);



/* implemetation */

unsigned int GET_FCC (FILE *fp) {
      unsigned char tmp[4];

      tmp[0] = getc(fp);
      tmp[1] = getc(fp);
      tmp[2] = getc(fp);
      tmp[3] = getc(fp);

      return FCC (tmp);
}

unsigned int GET_TCC (FILE *fp) {
      char tmp[5];

      tmp[0] = getc(fp);
      tmp[1] = getc(fp);
      tmp[2] = 0;
      tmp[3] = 0;

      return FCC (tmp);
}

char *fcc_to_char (unsigned int fcc) {
      DEBUG_FCC[0]= (fcc)&0177;
      DEBUG_FCC[1]= (fcc>>8)&0177;
      DEBUG_FCC[2]= (fcc>>16)&0177;
      DEBUG_FCC[3]= (fcc>>24)&0177;

      return DEBUG_FCC; 
}

char *tcc_to_char (unsigned int tcc) {
      DEBUG_FCC[0]= (tcc)&0177;
      DEBUG_FCC[1]= (tcc>>8)&0177;
      DEBUG_FCC[2]= 0;
      DEBUG_FCC[3]= 0;

      return DEBUG_FCC; 
}

int AVI_get_stream (AviMovie *movie, int avist_type, int stream_num) {
      int cur_stream;

      if (movie == NULL)
            return -AVI_ERROR_OPTION;

      for (cur_stream=0; cur_stream < movie->header->Streams; cur_stream++) {
            if (movie->streams[cur_stream].sh.Type == avist_type) {
                  if (stream_num == 0)
                        return cur_stream;
                  else
                        stream_num--;
            }
      }

      return -AVI_ERROR_FOUND;
}

static int fcc_get_stream (int fcc) {
      char fccs[4];

      fccs[0] = fcc;
      fccs[1] = fcc>>8;
      fccs[2] = fcc>>16;
      fccs[3] = fcc>>24;

      return 10*(fccs[0]-'0') + (fccs[1]-'0');
}

static int fcc_is_data (int fcc) {
      char fccs[4];

      fccs[0] = fcc;
      fccs[1] = fcc>>8;
      fccs[2] = fcc>>16;
      fccs[3] = fcc>>24;

      if (!isdigit (fccs[0]) || !isdigit (fccs[1]) || (fccs[2] != 'd' && fccs[2] != 'w'))
            return 0;
      if (fccs[3] != 'b' && fccs[3] != 'c')
            return 0;

      return 1;
}

AviError AVI_print_error (AviError in_error) {
      int error;

      if ((int) in_error < 0)
            error = -in_error;
      else
            error = in_error;

      switch (error) {
      case AVI_ERROR_NONE:
            break;
      case AVI_ERROR_COMPRESSION:
            printf ("AVI ERROR: compressed in an unsupported format\n");
            break;
      case AVI_ERROR_OPEN:
            printf ("AVI ERROR: could not open file\n");
            break;
      case AVI_ERROR_READING:
            printf ("AVI ERROR: could not read from file\n");
            break;
      case AVI_ERROR_WRITING:
            printf ("AVI ERROR: could not write to file\n");
            break;
      case AVI_ERROR_FORMAT:
            printf ("AVI ERROR: file is in an illegal or unrecognized format\n");
            break;
      case AVI_ERROR_ALLOC:
            printf ("AVI ERROR: error encountered while allocating memory\n");
            break;
      case AVI_ERROR_OPTION:
            printf ("AVI ERROR: program made illegal request\n");
            break;
      case AVI_ERROR_FOUND:
            printf ("AVI ERROR: movie did not contain expected item\n");
            break;
      default: 
            break;
      }

      return in_error;
}

void AVI_set_debug (int mode) {
      AVI_DEBUG= mode;
}

int AVI_is_avi (char *name) {
      FILE *fp;
      int ret;
      
      fp = fopen (name, "rb");
      if (fp == NULL)
            return 0;

      if (GET_FCC (fp) != FCC("RIFF") ||
          !GET_FCC (fp) ||
          GET_FCC (fp) != FCC("AVI ")) {
            ret = 0;
      } else {
            ret = 1;
      }

      fclose(fp);
      return ret;
}

AviError AVI_open_movie (char *name, AviMovie *movie) {
      int temp, fcca, size;
      
      DEBUG("opening movie\n");

      memset(movie, 0, sizeof(AviMovie));

      movie->type = AVI_MOVIE_READ;
      movie->fp = fopen (name, "rb");
      movie->offset_table = NULL;

      if (movie->fp == NULL)
            return AVI_ERROR_OPEN;

      if (GET_FCC (movie->fp) != FCC("RIFF") ||
          !(movie->size = GET_FCC (movie->fp)))
            return AVI_ERROR_FORMAT;

      movie->header = (AviMainHeader *) MEM_mallocN (sizeof (AviMainHeader), "movieheader");
/*    movie->header = (AviMainHeader *) malloc (sizeof (AviMainHeader)); */

      if (GET_FCC (movie->fp) != FCC("AVI ") ||
          GET_FCC (movie->fp) != FCC("LIST") ||
          !GET_FCC (movie->fp) ||
          GET_FCC (movie->fp) != FCC("hdrl") ||
          (movie->header->fcc = GET_FCC (movie->fp)) != FCC("avih") ||
          !(movie->header->size = GET_FCC (movie->fp))) {
            DEBUG("bad initial header info\n");
            return AVI_ERROR_FORMAT;
      }
      
      movie->header->MicroSecPerFrame = GET_FCC(movie->fp);
      movie->header->MaxBytesPerSec = GET_FCC(movie->fp);
      movie->header->PaddingGranularity = GET_FCC(movie->fp);
      movie->header->Flags = GET_FCC(movie->fp);
      movie->header->TotalFrames = GET_FCC(movie->fp);
      movie->header->InitialFrames = GET_FCC(movie->fp);
      movie->header->Streams = GET_FCC(movie->fp);
      movie->header->SuggestedBufferSize = GET_FCC(movie->fp);
      movie->header->Width = GET_FCC(movie->fp);
      movie->header->Height = GET_FCC(movie->fp);
      movie->header->Reserved[0] = GET_FCC(movie->fp);
      movie->header->Reserved[1] = GET_FCC(movie->fp);
      movie->header->Reserved[2] = GET_FCC(movie->fp);
      movie->header->Reserved[3] = GET_FCC(movie->fp);

      fseek (movie->fp, movie->header->size-14*4, SEEK_CUR);

      if (movie->header->Streams < 1) {
            DEBUG("streams less than 1\n");
            return AVI_ERROR_FORMAT;
      }
      
      movie->streams = (AviStreamRec *) MEM_callocN (sizeof(AviStreamRec) * movie->header->Streams, "moviestreams");
/*    movie->streams = (AviStreamRec *) */
/*          malloc (sizeof(AviStreamRec) * movie->header->Streams); */

      for (temp=0; temp < movie->header->Streams; temp++) {

            if (GET_FCC(movie->fp) != FCC("LIST") ||
                !GET_FCC (movie->fp) ||
                GET_FCC (movie->fp) != FCC ("strl") ||
                (movie->streams[temp].sh.fcc = GET_FCC (movie->fp)) != FCC ("strh") ||
                !(movie->streams[temp].sh.size = GET_FCC (movie->fp))) {
                  DEBUG("bad stream header information\n");
                  return AVI_ERROR_FORMAT;                        
            }

            movie->streams[temp].sh.Type = GET_FCC (movie->fp);
            movie->streams[temp].sh.Handler = GET_FCC (movie->fp);

            fcca = movie->streams[temp].sh.Handler;
            
            if (movie->streams[temp].sh.Type == FCC("vids")) {
                  if (fcca == FCC ("DIB ") ||
                        fcca == FCC ("RGB ") ||
                        fcca == FCC ("rgb ") ||
                        fcca == FCC ("RAW ") ||
                        fcca == 0) {
                        movie->streams[temp].format = AVI_FORMAT_AVI_RGB;
                  } else if (fcca == FCC ("mjpg")||fcca == FCC ("MJPG")) {
                        movie->streams[temp].format = AVI_FORMAT_MJPEG;
                  } else {
                        return AVI_ERROR_COMPRESSION;
                  }
            }
            
            movie->streams[temp].sh.Flags = GET_FCC (movie->fp);
            movie->streams[temp].sh.Priority = GET_TCC (movie->fp);
            movie->streams[temp].sh.Language = GET_TCC (movie->fp);
            movie->streams[temp].sh.InitialFrames = GET_FCC (movie->fp);
            movie->streams[temp].sh.Scale = GET_FCC (movie->fp);
            movie->streams[temp].sh.Rate = GET_FCC (movie->fp);
            movie->streams[temp].sh.Start = GET_FCC (movie->fp);
            movie->streams[temp].sh.Length = GET_FCC (movie->fp);
            movie->streams[temp].sh.SuggestedBufferSize = GET_FCC (movie->fp);
            movie->streams[temp].sh.Quality = GET_FCC (movie->fp);
            movie->streams[temp].sh.SampleSize = GET_FCC (movie->fp);
            movie->streams[temp].sh.left = GET_TCC (movie->fp);
            movie->streams[temp].sh.top = GET_TCC (movie->fp);
            movie->streams[temp].sh.right = GET_TCC (movie->fp);
            movie->streams[temp].sh.bottom = GET_TCC (movie->fp);

            fseek (movie->fp, movie->streams[temp].sh.size-14*4, SEEK_CUR);

            if (GET_FCC (movie->fp) != FCC("strf")) {
                  DEBUG("no stream format information\n");
                  return AVI_ERROR_FORMAT;
            }

            movie->streams[temp].sf_size= GET_FCC(movie->fp);
            if (movie->streams[temp].sh.Type == FCC("vids")) {
                  if (movie->streams[temp].sf_size == sizeof(AviBitmapInfoHeader)-8) {
                        AviBitmapInfoHeader *bi;
                        
                        movie->streams[temp].sf= MEM_mallocN(sizeof(AviBitmapInfoHeader), "streamformat");
/*                      movie->streams[temp].sf= malloc(sizeof(AviBitmapInfoHeader)); */
                        
                        bi= (AviBitmapInfoHeader *) movie->streams[temp].sf;
                        
                        bi->fcc= FCC("strf");
                        bi->size= movie->streams[temp].sf_size;
                        bi->Size= GET_FCC(movie->fp);
                        bi->Width= GET_FCC(movie->fp);
                        bi->Height= GET_FCC(movie->fp);
                        bi->Planes= GET_TCC(movie->fp);
                        bi->BitCount= GET_TCC(movie->fp);
                        bi->Compression= GET_FCC(movie->fp);
                        bi->SizeImage= GET_FCC(movie->fp);
                        bi->XPelsPerMeter= GET_FCC(movie->fp);
                        bi->YPelsPerMeter= GET_FCC(movie->fp);
                        bi->ClrUsed= GET_FCC(movie->fp);
                        bi->ClrImportant= GET_FCC(movie->fp);
                        
                        fcca = bi->Compression;

                        if (fcca == FCC ("DIB ") ||
                              fcca == FCC ("RGB ") ||
                              fcca == FCC ("rgb ") ||
                              fcca == FCC ("RAW ") ||
                              fcca == FCC ("mjpg") ||
                              fcca == FCC ("MJPG") ||
                              fcca == 0) {
                        } else {
                              return AVI_ERROR_COMPRESSION;
                        }

                  } else fseek (movie->fp, movie->streams[temp].sf_size, SEEK_CUR);
            } else fseek (movie->fp, movie->streams[temp].sf_size, SEEK_CUR);
            
            /* Walk to the next LIST */         
            while (GET_FCC (movie->fp) != FCC("LIST")) {
                  temp= GET_FCC (movie->fp);
                  if (temp<0 || ftell(movie->fp) > movie->size) {
                        DEBUG("incorrect size in header or error in AVI\n");
                      return AVI_ERROR_FORMAT;                    
                  }
                  fseek(movie->fp, temp, SEEK_CUR);               
            }
            
            fseek(movie->fp, -4L, SEEK_CUR);          
      }

      while (1) {
            temp = GET_FCC (movie->fp);
            size = GET_FCC (movie->fp);

            if (size == 0)
                  break;

            if (temp == FCC("LIST")) {
                  if (GET_FCC(movie->fp) == FCC ("movi"))
                        break;
                  else
                        fseek (movie->fp, size-4, SEEK_CUR);
            } else {
                  fseek (movie->fp, size, SEEK_CUR);
            }
            if (ftell(movie->fp) > movie->size) {
                  DEBUG("incorrect size in header or error in AVI\n");
                return AVI_ERROR_FORMAT;
            }
      }

      movie->movi_offset = ftell (movie->fp);
      movie->read_offset = movie->movi_offset;
      if (AVI_DEBUG) printf ("movi_offset is %d\n", movie->movi_offset);
      
      /* Read in the index if the file has one, otherwise create one */
      if (movie->header->Flags & AVIF_HASINDEX) {
            fseek(movie->fp, size-4, SEEK_CUR);

            if (GET_FCC(movie->fp) != FCC("idx1")) {
                  DEBUG("bad index informatio\n");
                  return AVI_ERROR_FORMAT;
            }

            movie->index_entries = GET_FCC (movie->fp)/sizeof(AviIndexEntry);
            if (movie->index_entries == 0) {
                  DEBUG("no index entries\n");
                  return AVI_ERROR_FORMAT;
            }

            movie->entries = (AviIndexEntry *) MEM_mallocN (movie->index_entries * sizeof(AviIndexEntry),"movieentries");
/*          movie->entries = (AviIndexEntry *) */
/*                malloc (movie->index_entries * sizeof(AviIndexEntry)); */

            for (temp=0; temp < movie->index_entries; temp++) {
                  movie->entries[temp].ChunkId = GET_FCC (movie->fp);
                  movie->entries[temp].Flags = GET_FCC (movie->fp);
                  movie->entries[temp].Offset = GET_FCC (movie->fp);
                  movie->entries[temp].Size = GET_FCC (movie->fp);
                  
                  if (AVI_DEBUG) printf ("Index entry %04d: ChunkId:%s Flags:%d Offset:%d Size:%d\n", temp, fcc_to_char(movie->entries[temp].ChunkId), movie->entries[temp].Flags, movie->entries[temp].Offset, movie->entries[temp].Size);
            }

/* Some AVI's have offset entries in absolute coordinates
 * instead of an offset from the movie beginning... this is...
 * wacky, but we need to handle it. The wacky offset always
 * starts at movi_offset it seems... so we'll check that.
 * Note the the offset needs an extra 4 bytes for some 
 * undetermined reason */
 
            if (movie->entries[0].Offset == movie->movi_offset)
                  movie->read_offset= 4;
      }

      DEBUG("movie succesfully opened\n");
      return AVI_ERROR_NONE;
}

void *AVI_read_frame (AviMovie *movie, AviFormat format, int frame, int stream) {
      int cur_frame=-1, i=0, temp;
      void *buffer;

      /* Retrieve the record number of the desired frame in the index */

      while (cur_frame < frame && i < movie->index_entries) {
            if (fcc_is_data (movie->entries[i].ChunkId) &&
                fcc_get_stream (movie->entries[i].ChunkId) == stream)
                  cur_frame++;

            i++;
      }

      if (cur_frame != frame) return NULL;
      
      fseek (movie->fp, movie->read_offset + movie->entries[i-1].Offset, SEEK_SET);

      temp = GET_FCC(movie->fp);
      buffer = MEM_mallocN (temp,"readbuffer");
/*    buffer = malloc(temp); */

      if (fread (buffer, 1, temp, movie->fp) != temp) {
            MEM_freeN(buffer);
/*          free(buffer); */

            return NULL;
      }
      
      buffer = avi_format_convert (movie, stream, buffer, movie->streams[stream].format, format, &temp);

      return buffer;
}

AviError AVI_close (AviMovie *movie) {
      int i;

      fclose (movie->fp);

      for (i=0; i < movie->header->Streams; i++) {
            if (movie->streams[i].sf != NULL)
                  MEM_freeN (movie->streams[i].sf);
      }

      if (movie->header != NULL)
            MEM_freeN (movie->header);
      if (movie->streams!= NULL)
            MEM_freeN (movie->streams);
      if (movie->entries != NULL)
            MEM_freeN (movie->entries);
      if (movie->offset_table != NULL)
            MEM_freeN (movie->offset_table);

      return AVI_ERROR_NONE;
}

AviError AVI_open_compress (char *name, AviMovie *movie, int streams, ...) {
      va_list ap;
      AviList list;
      AviChunk chunk;
      int i;
      int header_pos1, header_pos2;
      int stream_pos1, stream_pos2;

      movie->type = AVI_MOVIE_WRITE;
      movie->fp = fopen (name, "wb");

      movie->index_entries = 0;

      if (movie->fp == NULL)
            return AVI_ERROR_OPEN;

      movie->offset_table = (long *) MEM_mallocN ((1+streams*2) * sizeof (long),"offsettable");
/*    movie->offset_table = (long *) malloc ((1+streams*2) * sizeof (long)); */
      
      for (i=0; i < 1 + streams*2; i++)
            movie->offset_table[i] = -1L;

      movie->entries = NULL;

      movie->header = (AviMainHeader *) MEM_mallocN (sizeof(AviMainHeader),"movieheader");
/*    movie->header = (AviMainHeader *) malloc (sizeof(AviMainHeader)); */

      movie->header->fcc = FCC("avih");
      movie->header->size = 56;
      movie->header->MicroSecPerFrame = 66667;
      movie->header->MaxBytesPerSec = 0; 
      movie->header->PaddingGranularity = 0; 
      movie->header->Flags = AVIF_HASINDEX | AVIF_MUSTUSEINDEX;
      movie->header->TotalFrames = 0;
      movie->header->InitialFrames = 0;
      movie->header->Streams = streams;
      movie->header->SuggestedBufferSize = 0;
      movie->header->Width = 0;
      movie->header->Height = 0;
      movie->header->Reserved[0] = 0;
      movie->header->Reserved[1] = 0;
      movie->header->Reserved[2] = 0;
      movie->header->Reserved[3] = 0;

      movie->streams = (AviStreamRec *) MEM_mallocN (sizeof(AviStreamRec) * movie->header->Streams,"moviestreams");
/*    movie->streams = (AviStreamRec *) malloc (sizeof(AviStreamRec) * movie->header->Streams); */

      va_start (ap, streams);

      for (i=0; i < movie->header->Streams; i++) {
            movie->streams[i].format = va_arg(ap, AviFormat);

            movie->streams[i].sh.fcc = FCC ("strh");
            movie->streams[i].sh.size = 56;
            movie->streams[i].sh.Type = avi_get_format_type (movie->streams[i].format);
            if (movie->streams[i].sh.Type == 0)
                  return AVI_ERROR_FORMAT;

            movie->streams[i].sh.Handler = avi_get_format_fcc (movie->streams[i].format);
            if (movie->streams[i].sh.Handler == 0)
                  return AVI_ERROR_FORMAT;

            movie->streams[i].sh.Flags = 0;
            movie->streams[i].sh.Priority = 0;
            movie->streams[i].sh.Language = 0;
            movie->streams[i].sh.InitialFrames = 0;
            movie->streams[i].sh.Scale = 66667;
            movie->streams[i].sh.Rate = 1000000;
            movie->streams[i].sh.Start = 0;
            movie->streams[i].sh.Length = 0;
            movie->streams[i].sh.SuggestedBufferSize = 0;
            movie->streams[i].sh.Quality = 10000;
            movie->streams[i].sh.SampleSize = 0;
            movie->streams[i].sh.left = 0;
            movie->streams[i].sh.top = 0;
            movie->streams[i].sh.right = 0;
            movie->streams[i].sh.bottom = 0;

            if (movie->streams[i].sh.Type == FCC("vids")) { 
                  if (movie->streams[i].format == AVI_FORMAT_MJPEG) {
                        movie->streams[i].sf = MEM_mallocN (sizeof(AviBitmapInfoHeader) 
                                                            + sizeof(AviMJPEGUnknown),"moviestreamformatL");
/*                      movie->streams[i].sf = malloc (sizeof(AviBitmapInfoHeader)  */
/*                                                                   + sizeof(AviMJPEGUnknown)); */
                        movie->streams[i].sf_size = sizeof(AviBitmapInfoHeader) + sizeof(AviMJPEGUnknown);
                  } else {
                        movie->streams[i].sf = MEM_mallocN (sizeof(AviBitmapInfoHeader),  "moviestreamformatS");
/*                      movie->streams[i].sf = malloc (sizeof(AviBitmapInfoHeader)); */
                        movie->streams[i].sf_size = sizeof(AviBitmapInfoHeader);
                  }
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->fcc = FCC ("strf");
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->size = movie->streams[i].sf_size - 8;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->Size = movie->streams[i].sf_size - 8;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->Width = 0;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->Height = 0;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->Planes = 1;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->BitCount = 24;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->Compression = avi_get_format_compression (movie->streams[i].format);
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->SizeImage = 0;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->XPelsPerMeter = 0;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->YPelsPerMeter = 0;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->ClrUsed = 0;
                  ((AviBitmapInfoHeader *) movie->streams[i].sf)->ClrImportant = 0;

                  if (movie->streams[i].format == AVI_FORMAT_MJPEG) {
                        AviMJPEGUnknown *tmp;
                        
                        tmp = (AviMJPEGUnknown *) ((char*) movie->streams[i].sf +sizeof(AviBitmapInfoHeader));
                        
                        tmp->a = 44;
                        tmp->b = 24;
                        tmp->c = 0;
                        tmp->d = 2;
                        tmp->e = 8;
                        tmp->f = 2;
                        tmp->g = 1;
                  }
            } else if (movie->streams[i].sh.Type == FCC("auds")) {
                  ;
            }
      }

      list.fcc = FCC("RIFF");
      list.size = 0;
      list.ids = FCC("AVI ");

      awrite (movie, &list, 1, sizeof(AviList), movie->fp, AVI_LIST);

      list.fcc = FCC("LIST");
      list.size = 0;
      list.ids = FCC("hdrl");

      awrite (movie, &list, 1, sizeof(AviList), movie->fp, AVI_LIST);

      header_pos1 = ftell(movie->fp);

      movie->offset_table[0] = ftell(movie->fp);

      awrite (movie, movie->header, 1, sizeof(AviMainHeader), movie->fp, AVI_MAINH);

      for (i=0; i < movie->header->Streams; i++) {
            list.fcc = FCC("LIST");
            list.size = 0;
            list.ids = FCC("strl");

            awrite (movie, &list, 1, sizeof(AviList), movie->fp, AVI_LIST);

            stream_pos1 = ftell(movie->fp);

            movie->offset_table[1+i*2] = ftell(movie->fp);
            awrite (movie, &movie->streams[i].sh, 1, sizeof(AviStreamHeader), movie->fp, AVI_STREAMH);

            movie->offset_table[1+i*2+1] = ftell(movie->fp);
            awrite (movie, movie->streams[i].sf, 1, movie->streams[i].sf_size, movie->fp, AVI_BITMAPH);

            stream_pos2 = ftell(movie->fp);

            fseek (movie->fp, stream_pos1-8, SEEK_SET);

            PUT_FCCN((stream_pos2-stream_pos1+4L), movie->fp);

            fseek (movie->fp, stream_pos2, SEEK_SET);
      }

      if (ftell(movie->fp) < 2024 - 8) {
            chunk.fcc = FCC("JUNK");
            chunk.size = 2024-8-ftell(movie->fp);

            awrite (movie, &chunk, 1, sizeof(AviChunk), movie->fp, AVI_CHUNK);

            for (i=0; i < chunk.size; i++)
                  putc(0, movie->fp);
      }

      header_pos2 = ftell(movie->fp);

      list.fcc = FCC("LIST");
      list.size = 0;
      list.ids = FCC("movi");

      awrite (movie, &list, 1, sizeof(AviList), movie->fp, AVI_LIST);

      movie->movi_offset = ftell(movie->fp)-8L;

      fseek (movie->fp, AVI_HDRL_SOFF, SEEK_SET);

      PUT_FCCN((header_pos2-header_pos1+4L), movie->fp);

      return AVI_ERROR_NONE;
}

AviError AVI_write_frame (AviMovie *movie, int frame_num, ...) {
      AviList list;
      AviChunk chunk;
      AviIndexEntry *temp;
      va_list ap;
      int stream;
      long rec_off;
      AviFormat format;
      void *buffer;
      int size;

      if (frame_num < 0)
            return AVI_ERROR_OPTION;

      /* Allocate the new memory for the index entry */

      if (frame_num+1 > movie->index_entries) {
            temp = (AviIndexEntry *) MEM_mallocN ((frame_num+1) * 
                (movie->header->Streams+1) * sizeof(AviIndexEntry),"newidxentry");
            if (movie->entries != NULL) {
                  memcpy (temp, movie->entries, movie->index_entries * (movie->header->Streams+1)
                      * sizeof(AviIndexEntry));
                  MEM_freeN (movie->entries);
            }

            movie->entries = temp;
            movie->index_entries = frame_num+1;
      }

      /* Slap a new record entry onto the end of the file */

      fseek (movie->fp, 0L, SEEK_END);

      list.fcc = FCC("LIST");
      list.size = 0;
      list.ids = FCC("rec ");

      awrite (movie, &list, 1, sizeof(AviList), movie->fp, AVI_LIST);

      rec_off = ftell (movie->fp)-8L;

      /* Write a frame for every stream */

      va_start (ap, frame_num);

      for (stream=0; stream < movie->header->Streams; stream++) {
            unsigned int tbuf=0;
            
            format = va_arg (ap, AviFormat);
            buffer = va_arg (ap, void*);
            size = va_arg (ap, int);

            /* Convert the buffer into the output format */
            buffer = avi_format_convert (movie, stream, buffer, format, movie->streams[stream].format, &size);

            /* Write the header info for this data chunk */

            fseek (movie->fp, 0L, SEEK_END);

            chunk.fcc = avi_get_data_id (format, stream);
            chunk.size = size;
            
            if (size%4) chunk.size += 4 - size%4;
            
            awrite (movie, &chunk, 1, sizeof(AviChunk), movie->fp, AVI_CHUNK);

            /* Write the index entry for this data chunk */

            movie->entries[frame_num * (movie->header->Streams+1) + stream + 1].ChunkId = chunk.fcc;
            movie->entries[frame_num * (movie->header->Streams+1) + stream + 1].Flags = AVIIF_KEYFRAME;
            movie->entries[frame_num * (movie->header->Streams+1) + stream + 1].Offset = ftell(movie->fp)-12L-movie->movi_offset;
            movie->entries[frame_num * (movie->header->Streams+1) + stream + 1].Size = chunk.size;

            /* Write the chunk */
            awrite (movie, buffer, 1, size, movie->fp, AVI_RAW);
            MEM_freeN (buffer);

            if (size%4) awrite (movie, &tbuf, 1, 4-size%4, movie->fp, AVI_RAW);

            /* Update the stream headers length field */
            movie->streams[stream].sh.Length++;
            fseek (movie->fp, movie->offset_table[1+stream*2], SEEK_SET);
            awrite (movie, &movie->streams[stream].sh, 1, sizeof(AviStreamHeader), movie->fp, AVI_STREAMH);
      }
      va_end (ap);

      /* Record the entry for the new record */

      fseek (movie->fp, 0L, SEEK_END);

      movie->entries[frame_num * (movie->header->Streams+1)].ChunkId = FCC("rec ");
      movie->entries[frame_num * (movie->header->Streams+1)].Flags = AVIIF_LIST;
      movie->entries[frame_num * (movie->header->Streams+1)].Offset = rec_off-8L-movie->movi_offset;
      movie->entries[frame_num * (movie->header->Streams+1)].Size = ftell(movie->fp)-(rec_off+4L);

      /* Update the record size */
      fseek (movie->fp, rec_off, SEEK_SET);
      PUT_FCCN (movie->entries[frame_num * (movie->header->Streams+1)].Size, movie->fp);

      /* Update the main header information in the file */
      movie->header->TotalFrames++;
      fseek (movie->fp, movie->offset_table[0], SEEK_SET);
      awrite (movie, movie->header, 1, sizeof(AviMainHeader), movie->fp, AVI_MAINH);

      return AVI_ERROR_NONE;
}

AviError AVI_close_compress (AviMovie *movie) {
      int temp, movi_size, i;

      fseek (movie->fp, 0L, SEEK_END);
      movi_size = ftell (movie->fp);

      PUT_FCC ("idx1", movie->fp);
      PUT_FCCN ((movie->index_entries*(movie->header->Streams+1)*16), movie->fp);

      for (temp=0; temp < movie->index_entries*(movie->header->Streams+1); temp++)
            awrite (movie, &movie->entries[temp], 1, sizeof(AviIndexEntry), movie->fp, AVI_INDEXE);

      temp = ftell (movie->fp);

      fseek (movie->fp, AVI_RIFF_SOFF, SEEK_SET);

      PUT_FCCN((temp-8L), movie->fp);

      fseek (movie->fp, movie->movi_offset, SEEK_SET);

      PUT_FCCN((movi_size-(movie->movi_offset+4L)),movie->fp);

      fclose (movie->fp);

      for (i=0; i < movie->header->Streams; i++) {
            if (movie->streams[i].sf != NULL)
                  MEM_freeN (movie->streams[i].sf);
      }
      if (movie->header != NULL)
            MEM_freeN (movie->header);
      if (movie->entries != NULL)
            MEM_freeN (movie->entries);
      if (movie->streams != NULL)
            MEM_freeN (movie->streams);
      if (movie->offset_table != NULL)
            MEM_freeN (movie->offset_table);
      return AVI_ERROR_NONE;
}

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