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#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "stream.h"
extern int verbose; // defined in mplayer.c
#ifdef __FreeBSD__
#warning "VCD support under FreeBSD not implemented yet"
#include "vcd_read_fbsd.c"
#else
#include "vcd_read.c"
#endif
//=================== STREAMER =========================
int stream_fill_buffer(stream_t *s){
int len;
if(s->eof){ s->buf_pos=s->buf_len=0; return 0; }
switch(s->type){
case STREAMTYPE_FILE:
case STREAMTYPE_STREAM:
len=read(s->fd,s->buffer,STREAM_BUFFER_SIZE);break;
case STREAMTYPE_VCD:
#ifdef VCD_CACHE
len=vcd_cache_read(s->fd,s->buffer);break;
#else
len=vcd_read(s->fd,s->buffer);break;
#endif
default: len=0;
}
if(len<=0){ s->eof=1; s->buf_pos=s->buf_len=0; return 0; }
s->buf_pos=0;
s->buf_len=len;
s->pos+=len;
// printf("[%d]",len);fflush(stdout);
return len;
}
int stream_seek_long(stream_t *s,unsigned int pos){
unsigned int newpos;
// if(verbose>=3) printf("seek to 0x%X\n",pos);
if(verbose>=3){
printf("s->pos=%X newpos=%X new_bufpos=%X buflen=%X \n",
(unsigned int)s->pos,newpos,pos,s->buf_len);
}
s->buf_pos=s->buf_len=0;
switch(s->type){
case STREAMTYPE_FILE:
case STREAMTYPE_STREAM:
newpos=pos&(~(STREAM_BUFFER_SIZE-1));break;
case STREAMTYPE_VCD:
newpos=(pos/VCD_SECTOR_DATA)*VCD_SECTOR_DATA;break;
}
pos-=newpos;
if(newpos==0 || newpos!=s->pos){
switch(s->type){
case STREAMTYPE_FILE:
s->pos=newpos; // real seek
if(lseek(s->fd,s->pos,SEEK_SET)<0) s->eof=1;
break;
case STREAMTYPE_VCD:
s->pos=newpos; // real seek
#ifdef VCD_CACHE
vcd_cache_seek(s->pos/VCD_SECTOR_DATA);
#else
vcd_set_msf(s->pos/VCD_SECTOR_DATA);
#endif
break;
case STREAMTYPE_STREAM:
//s->pos=newpos; // real seek
if(newpos<s->pos){
printf("Cannot seek backward in linear streams!\n");
return 1;
}
while(s->pos<newpos){
if(stream_fill_buffer(s)<=0) break; // EOF
}
break;
}
// putchar('.');fflush(stdout);
//} else {
// putchar('%');fflush(stdout);
}
stream_fill_buffer(s);
if(pos>=0 && pos<s->buf_len){
s->buf_pos=pos; // byte position in sector
return 1;
}
if(verbose) printf("stream_seek: WARNING! Can't seek to 0x%X !\n",pos+newpos);
return 0;
}
void stream_reset(stream_t *s){
if(s->eof){
s->pos=0; //ftell(f);
// s->buf_pos=s->buf_len=0;
s->eof=0;
}
//stream_seek(s,0);
}
stream_t* new_stream(int fd,int type){
stream_t *s=malloc(sizeof(stream_t));
s->fd=fd;
s->type=type;
s->buf_pos=s->buf_len=0;
s->start_pos=s->end_pos=0;
stream_reset(s);
return s;
}
void free_stream(stream_t *s){
free(s);
}
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