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/*
$Id$
GridFlow
Copyright (c) 2001-2008 by Mathieu Bouchard
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.
See file ../COPYING for further informations on licensing terms.
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.
*/
#include "../gridflow.h.fcs"
#include <string>
#include <map>
#include <errno.h>
#define L _L_
/* API (version 0.9.3)
mode is :in or :out
def initialize(mode,*args) :
open a file handler (do it via .new of class)
attr_reader :description :
a _literal_ (constant) string describing the format handler
def self.info() optional :
return a string describing the format handler differently
than self.description(). in particular, it can list
compile-time options and similar things. for example,
quicktime returns a list of codecs.
def 0 bang() :
read one frame, send through outlet 0
return values :
Integer >= 0 : frame number of frame read.
false : no frame was read : end of sequence.
nil : a frame was read, but can't say its number.
note that trying to read a nonexistent frame should no longer
rewind automatically (@in handles that part), nor re-read the
last frame (mpeg/quicktime used to do this)
def 0 seek(Integer i) : select one frame to be read next (by number)
def 0 grid() : frame to write
def 0 get (optional Symbol s) : get one attribute value or all of them
def 0 ...() : options
outlet 0 grid() frame just read
outlet 0 ...() everything else
destructor : close a handler
*/
std::map<std::string,std::string> suffix_table;
void suffixes_are (const char *name, const char *suffixes) {
std::string name2 = name;
char *suff2 = strdup(suffixes);
char *suff3 = suff2+strlen(suff2);
for (char *s=suff2; s<suff3; s++) if (*s==' ' || *s==',') *s=0;
for (char *s=suff2; s<suff3; s+=strlen(s)+1) {
std::string ss = s;
suffix_table[ss]=name2;
}
}
\class SuffixLookup : FObject {
\constructor () {}
\decl 0 symbol (t_symbol *str);
};
\def 0 symbol (t_symbol *str) {
char *s = strdup(str->s_name);
char *t = strrchr(s,'.');
if (!t) outlet_symbol(bself->outlets[2],gensym(s));
else {
*t = 0;
outlet_symbol(bself->outlets[1],gensym(t+1));
std::map<std::string,std::string>::iterator u = suffix_table.find(std::string(t+1));
if (u==suffix_table.end()) outlet_bang(bself->outlets[0]);
else outlet_symbol(bself->outlets[0],gensym((char *)u->second.data()));
}
free(s);
}
\end class SuffixLookup {install("gf.suffix_lookup",1,3);}
\class Format : FObject
Format::Format (BFObject *bself, MESSAGE) : FObject(bself,MESSAGE2) {
mode=0; fd=-1; f=0; cast=int32_e; frame=0;
if (argv[0]==gensym("out")) this->mode=2; else
if (argv[0]==gensym("in")) this->mode=4; else RAISE("unknown mode");
// case mode
// when :in; flags[2]==1
// when :out; flags[1]==1
// else raise "Format opening mode is incorrect"
//end or raise "Format '#{self.class.instance_eval{@symbol_name}}' does not support mode '#{mode}'"
}
\def 0 open(t_symbol *mode, string filename) {
const char *fmode;
if (mode==gensym("in")) fmode="r"; else
if (mode==gensym("out")) fmode="w"; else
RAISE("bad mode");
if (f) _0_close(0,0);
if (mode==gensym("in")) {filename = gf_find_file(filename);}
f = fopen(filename.data(),fmode);
if (!f) RAISE("can't open file '%s': %s",filename.data(),strerror(errno));
fd = fileno(f);
// case gzfile:
// if (mode==SYM(in)) {filename = GridFlow.find_file(filename);}
// if (mode==:in) {raw_open_gzip_in filename; else raw_open_gzip_out filename;}
// def self.rewind() raw_open(*@raw_open_args); @frame = 0 end unless @rewind_redefined
// @rewind_redefined = true
}
\def 0 close() {if (f) {fclose(f); f=0; fd=-1;}}
\def 0 cast(NumberTypeE nt) {cast = nt;}
\def 0 seek(int frame) {
if (!frame) {_0_rewind(0,0); return;}
RAISE("don't know how to seek for frame other than # 0");
}
// this is what you should use to rewind
// different file-sources may redefine this as something else
// (eg: gzip)
\def 0 rewind () {
if (!f) RAISE("Nothing to rewind about...");
fseek(f,0,SEEK_SET);
frame = 0;
}
Format::~Format () {if (f) fclose(f); /*if (fd>=0) close(fd);*/}
\end class Format {}
/* This is the Grid format I defined: */
struct GridHeader {
char magic[5]; // = "\7fgrid" on little endian, "\x7fGRID" on big endian
uint8 type; // number of bits.
// the original doc said: "plus one of: 1:unsigned 2:float" but i don't recall what this means.
uint8 reserved; // set this to 0 all of the time.
uint8 dimn; // number of dimensions supported: at least 0..4)
// int32 dimv[dimn]; // number of elements in each dimension. (in the file's endianness!)
// raw data goes after that
};
\class FormatGrid : Format {
GridHeader head;
int endian;
NumberTypeE nt;
P<Dim> headerless_dim; // if null: headerful; if Dim: it is the assumed dimensions of received grids
\grin 0
\constructor (t_symbol *mode, string filename) {
strncpy(head.magic,is_le()?"\7fgrid":"\7fGRID",5);
head.type = 32;
_0_open(0,0,mode,filename);
}
\decl 0 bang ();
\decl 0 headerless (...);
\decl 0 headerful ();
\decl 0 type (NumberTypeE nt);
~FormatGrid() {
//@stream.close if @stream
//GridFlow.hunt_zombies
}
// \decl void raw_open_gzip_in(string filename);
// \decl void raw_open_gzip_out(string filename);
};
\def 0 bang () {
P<Dim> dim;
if (feof(f)) {outlet_bang(bself->te_outlet); return;}
if (headerless_dim) {
dim = headerless_dim;
} else {
fread(&head,1,8,f);
uint8 *m = (uint8 *)head.magic;
if (strncmp((char *)m,"\7fgrid",5)==0) endian=1; else
if (strncmp((char *)m,"\7fGRID",5)==0) endian=1; else
RAISE("unknown header, can't read grid from file: "
"%02x %02x %02x %02x %02x %02x %02x %02x",
m[0],m[1],m[2],m[3],m[4],m[5],m[6],m[7]);
if (head.type!=32) RAISE("unsupported grid type %d in file",head.type);
// apparently, head.type 8 and 16 worked too.
if (head.reserved!=0) RAISE("unsupported grid reserved field %d in file",head.reserved);
if (head.dimn>16) RAISE("unsupported grid number of dimensions %d in file",head.dimn);
int32 dimv[head.dimn];
fread(dimv,head.dimn,4,f);
if (endian != is_le()) swap32(head.dimn,(uint32 *)dimv);
dim = new Dim(head.dimn,dimv);
}
GridOutlet out(this,0,dim,nt);
long nn = dim->prod();
#define FOO(T) {T data[nn]; fread(data,nn,sizeof(T),f); out.send(nn,(T *)data);}
TYPESWITCH(nt,FOO,)
#undef FOO
SUPER;
}
GRID_INLET(FormatGrid,0) {
if (!headerless_dim) {
fwrite(&head,1,8,f);
fwrite(in->dim->v,in->dim->n,4,f); // forgot the endian here
}
} GRID_FLOW {
#define FOO(T) {T data2[n]; for(int i=0; i<n; i++) data2[i]=(T)data[i]; \
if (endian!=is_le()) swap_endian(n,data2); \
fwrite(data2,n,sizeof(T),f);}
TYPESWITCH(nt,FOO,)
#undef FOO
} GRID_FINISH {
fflush(f);
} GRID_END
\def 0 headerless (...) {
if (argc>=0 && argv[0].a_type==A_LIST) {
t_binbuf *b = (t_binbuf *)argv[0]; argc = binbuf_getnatom(b); argv = (t_atom2 *)binbuf_getvec(b);}
int v[argc];
for (int i=0; i<argc; i++) v[i] = argv[i];
headerless_dim = new Dim(argc,v);
}
\def 0 headerful () { headerless_dim = 0; }
//#!@#$ method name conflict ?
\def 0 type (NumberTypeE nt) {
//!@#$ bug: should not be able to modify this _during_ a transfer
switch (nt) {
case uint8_e: head.type= 8; break;
case int16_e: head.type=16; break;
case int32_e: head.type=32; break;
default: RAISE("unsupported type");
}
this->nt = nt;
}
//\def void raw_open_gzip_in(string filename) {
//r,w = IO.pipe
//if (pid=fork) {GridFlow.subprocesses[pid]=true; w.close; @stream = r;}
//else {r.close; STDOUT.reopen w; STDIN.reopen filename, "r"; exec "gzip", "-dc";}
//\def void raw_open_gzip_out(string filename) {
//r,w = IO.pipe
//if (pid=fork) {GridFlow.subprocesses[pid]=true; r.close; @stream = w;}
//else {w.close; STDIN.reopen r; STDOUT.reopen filename, "w"; exec "gzip", "-c";}
\end class FormatGrid {install_format("#io.grid",6,"grid");}
void startup_format () {
\startall
}
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