/* ----------------------------- MNI Header -----------------------------------
@NAME : RewindMPEG
@INPUT : MPEGfile - the input stream where the MPEG's coming from
Image - image descriptor (just passed to OpenMPEG ())
@OUTPUT : (none)
@RETURNS : (void)
@DESCRIPTION: Resets things so that the caller can start reading the MPEG
stream from the start again. Note that the caller does NOT
need to call OpenMPEG() again -- after a call to RewindMPEG(),
the next call to GetMPEGFrame() will return the first frame
of the MPEG.
@METHOD :
@GLOBALS : EOF_flag, curBits, bitOffset, bufLength, bitBuffer, totNumFrames
@CALLS :
@CREATED : 94/7/20, Greg Ward
@MODIFIED :
@COMMENTS : The global variables declared in this function should
not normally be used by the front end to the MPEG
decoder. However, I've chosen to bend the rules for
just this one function. N.B.: EOF_flag comes from
globals.c; curBits, bitOffset, bufLength, and bitBuffer
from util.c; and totNumFrames is defined in this file.
---------------------------------------------------------------------------- */
Boolean RewindMPEG (FILE *MPEGfile, ImageDesc *Image) {
CloseMPEG ();
rewind (MPEGfile);
bitBuffer = NULL;
totNumFrames = 0;
return (OpenMPEG (MPEGfile, Image));
}
static inline void
malib_mpegfile_init (MalibMpegFile* mpegfile)
{
MalibFrame* frame_info;
if ((mpegfile->fp = fopen (mpegfile->filename, "r")) == NULL)
{
g_error ("MalibMpegFile: file open");
exit (-1);
}
SetMPEGOption (MALIB_STD_MPEG_DITHER, MALIB_STD_MPEG_COLOR);
OpenMPEG (mpegfile->fp, &mpegfile->img);
mpegfile->pixels = (unsigned char*) malloc (mpegfile->img.Size * sizeof(unsigned char));
frame_info = malib_frame_new (MALIB_FRAME_COLORMODEL_RGB,
mpegfile->img.Width, mpegfile->img.Height,
mpegfile->img.Depth, (int*)0);
malib_source_set_frame_info ((MalibSource*)mpegfile, frame_info);
}
Image_File * mpeg_open(const char *name,int rw)
{
Image_File *ifp;
ImageDesc *idp;
#ifdef QUIP_DEBUG
printf("mpeg_open: IN\n");
#endif /* QUIP_DEBUG */
ifp = IMG_FILE_CREAT(name,rw,IFT_MPEG);
if( ifp==NO_IMAGE_FILE ) return(ifp);
ifp->hdr = (Mpeg_Hdr *)getbuf( sizeof(Mpeg_Hdr) );
if( IS_READABLE(ifp) ) {
ifp->hdr->idp = (ImageDesc *)malloc( sizeof(ImageDesc) );
idp = ifp->hdr->idp;
SetMPEGOption (MPEG_DITHER, FULL_COLOR_DITHER);
if (!OpenMPEG(ifp->if_fp, idp)) {
advise("ERROR: OpenMPEG failed");
exit(1);
}
/* fill in some basic header info */
ifp->hdr->width = idp->Width;
ifp->hdr->height = idp->Height;
#ifdef BPP_3
ifp->hdr->depth = idp->Depth/8;
#else
ifp->hdr->depth = idp->PixelSize/8;
#endif
/* BUG: we need a more efficient way of counting frames! */
ifp->hdr->frames = get_n_frs(ifp);
// ifp->hdr->frames = get_n_of_frms(ifp->if_pathname);
mpeg_to_dp(ifp->if_dp,ifp->hdr);
#ifdef QUIP_DEBUG_USING_SDL
{
char buf[32];
/* Initialize SDL */
if ((SDL_Init(SDL_INIT_VIDEO) < 0) || !SDL_VideoDriverName(buf, 1)) {
sprintf(error_string,"Couldn't init SDL video: %s\n",
SDL_GetError());
warn(error_string);
}
//screen = SDL_SetVideoMode(idp->Width, idp->Height, 0, 0);
screen = SDL_SetVideoMode(idp->Width, idp->Height,
ifp->hdr->depth*8,
SDL_HWSURFACE/*video surface in hardware mem*/);
if ( screen == NULL ) {
fprintf(stderr, "Unable to set %dx%d video mode: %s\n",
idp->Width, idp->Height, SDL_GetError());
return NULL;
}
}
#endif /* QUIP_DEBUG_USING_SDL */
} else {
ifp->hdr->enc_opts = (MPEGe_options *)malloc( sizeof(MPEGe_options) );
/* Set default options. These can be changed later, if desired. */
MPEGe_default_options(ifp->hdr->enc_opts);
/* Start the library with default options */
if( !MPEGe_open(ifp->if_fp, ifp->hdr->enc_opts) ) {
warn("MPEGe lib initialization failure");
return NULL;
}
/* It doesn't make sense to initialize the header for writing. */
}
#ifdef QUIP_DEBUG
printf("mpeg_open: OUT\n");
#endif /* QUIP_DEBUG */
return(ifp);
}
