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