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/* Copyright (C) 2008 Vincent Penquerc'h.
This file is part of the Kate codec library.
Written by Vincent Penquerc'h.
Use, distribution and reproduction of this library is governed
by a BSD style source license included with this source in the
file 'COPYING'. Please read these terms before distributing. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#if defined WIN32 || defined _WIN32 || defined MSDOS || defined __CYGWIN__ || defined __EMX__ || defined OS2
#include <io.h>
#include <fcntl.h>
#endif
#if defined WIN32 || defined _WIN32
#include <process.h>
#endif
#include <stdarg.h>
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <errno.h>
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <ogg/ogg.h>
#include "kate/oggkate.h"
#include "kate_internal.h"
#include "ksrt.h"
#include "klrc.h"
#include "kkate.h"
#include "kfuzz.h"
#include "kstream.h"
#include "kutil.h"
#include "kread.h"
static int read_raw_packet(FILE *f,char **buffer,ogg_int64_t bytes)
{
size_t ret;
*buffer=(char*)kate_realloc(*buffer,bytes);
if (!*buffer) return -1;
ret=read(fileno(f),*buffer,bytes);
if (ret<(size_t)bytes) return -1;
return 0;
}
int read_raw_size_and_packet(FILE *f,char **buffer,ogg_int64_t *bytes)
{
size_t bytes_read;
int ret;
/* all subsequent packets are prefixed with 64 bits (signed) of the packet length in bytes */
bytes_read=read(fileno(f),bytes,8);
if (bytes_read!=8 || *bytes<=0) {
fprintf(stderr,"failed to read raw kate packet size (read %lu, bytes %"PRId64")\n",(unsigned long)bytes_read,*bytes);
return -1;
}
ret=read_raw_packet(f,buffer,*bytes);
if (ret<0) {
fprintf(stderr,"failed to read raw kate packet (%"PRId64" bytes)\n",*bytes);
return -1;
}
return 0;
}
FILE *open_and_probe_stream(const char *filename)
{
FILE *fin;
if (!filename || !strcmp(filename,"-")) {
#if defined WIN32 || defined _WIN32
_setmode(_fileno(stdin),_O_BINARY);
#else
#if defined MSDOS || defined __CYGWIN__ || defined __EMX__ || defined OS2 || defined __BORLANDC__
setmode(fileno(stdin),_O_BINARY);
#endif
#endif
fin=stdin;
}
else {
fin=fopen(filename,"rb");
if (!fin) {
fprintf(stderr,"%s: %s\n",filename,strerror(errno));
return NULL;
}
setvbuf(fin,NULL,_IONBF,0);
}
return fin;
}
int parse_ogg_stream(FILE *f,const char *pre_buffer,size_t pre_bytes,ogg_parser_funcs funcs,kate_uintptr_t data)
{
char *ptr=NULL;
ogg_sync_state oy;
ogg_page og;
ogg_int64_t bytes_read;
static const size_t buffer_size=4096;
size_t offset=0;
int ret;
long last_returned;
long leftover_size=0;
int in_hole=0;
long first_hole_size=0;
long hole_offset;
ogg_sync_init(&oy);
/* first add the buffer, if any */
if (pre_buffer && pre_bytes) {
ptr=ogg_sync_buffer(&oy,pre_bytes);
if (!ptr) {
fprintf(stderr,"Failed to get sync buffer for %lu bytes\n",(unsigned long)pre_bytes);
goto error;
}
memcpy(ptr,pre_buffer,pre_bytes);
ogg_sync_wrote(&oy,pre_bytes);
}
while (1) {
ptr=ogg_sync_buffer(&oy,buffer_size);
if (!ptr) {
fprintf(stderr,"Failed to get sync buffer for %lu bytes\n",(unsigned long)buffer_size);
goto error;
}
bytes_read=read(fileno(f),ptr,buffer_size);
if (bytes_read==0) {
break;
}
ogg_sync_wrote(&oy,bytes_read);
last_returned=0;
while ((ret=ogg_sync_pageout(&oy,&og))!=0) {
if (ret>0) {
/* new page */
if (in_hole) {
long hole_size=first_hole_size+leftover_size+oy.returned-(og.header_len+og.body_len);
if (funcs.on_hole) {
ret=(*funcs.on_hole)(data,hole_offset,hole_size);
if (ret<0) goto error;
}
offset+=hole_size;
}
if (funcs.on_page) {
ret=(*funcs.on_page)(data,offset,&og);
if (ret<0) goto error;
}
in_hole=0;
offset+=og.header_len+og.body_len;
}
else {
/* hole in data */
first_hole_size=oy.returned-last_returned;
hole_offset=offset;
in_hole=1;
}
leftover_size=0;
last_returned=oy.returned;
}
leftover_size+=oy.fill-last_returned;
}
/* detect holes at end of file */
if (leftover_size>0) {
if (funcs.on_hole) {
ret=(*funcs.on_hole)(data,offset,leftover_size);
if (ret<0) goto error;
}
}
ogg_sync_clear(&oy);
return 0;
error:
ogg_sync_clear(&oy);
return -1;
}
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