mirror of
https://github.com/mpv-player/mpv
synced 2024-12-17 12:25:03 +00:00
2025cab4dc
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@918 b3059339-0415-0410-9bf9-f77b7e298cf2
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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//int open(const char *pathname, int flags);
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#define BUFFSIZE (4*65536)
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#define NUM_BUFS (16)
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unsigned char *buffer[NUM_BUFS];
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unsigned int buf_read=0;
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unsigned int buf_write=0;
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unsigned int buf_read_pos=0;
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unsigned int buf_write_pos=0;
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int full_buffers=0;
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int main(int argc,char* argv[]){
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fd_set rfds;
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fd_set wfds;
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struct timeval tv;
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int retval;
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int i;
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// int empty=1;
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int can_read=1;
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int eof=0;
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int in_fd=0; // stdin
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if(argc>1) in_fd=open(argv[1],O_RDONLY|O_NDELAY);
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for(i=0;i<NUM_BUFS;i++) buffer[i]=malloc(BUFFSIZE);
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while(1){
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/* Watch stdin (fd 0) to see when it has input. */
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FD_ZERO(&rfds); if(can_read){ FD_SET(in_fd, &rfds);}
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FD_ZERO(&wfds); FD_SET(1, &wfds);
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/* Wait up to five seconds. */
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tv.tv_sec = 1;
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tv.tv_usec = 0;
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retval = select((in_fd<1?1:in_fd)+1, &rfds, &wfds, NULL, &tv);
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/* Don't rely on the value of tv now! */
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if (retval){
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if(FD_ISSET(in_fd, &rfds) || !full_buffers){
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fprintf(stderr,"\n%d r",full_buffers);fflush(stderr);
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if(full_buffers==NUM_BUFS){
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// buffer is full!
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can_read=0;
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fprintf(stderr,"\n%d full!\n",full_buffers);fflush(stderr);
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} else {
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// we can read input.
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int len=BUFFSIZE-buf_read_pos;
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fprintf(stderr,"R");fflush(stderr);
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len=read(in_fd,buffer[buf_read]+buf_read_pos,len);
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fprintf(stderr,"(%d)\n",len);fflush(stderr);
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if(len>0){
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buf_read_pos+=len;
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if(buf_read_pos>=BUFFSIZE){
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// block is full, find next!
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buf_read=(buf_read+1)%NUM_BUFS;
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++full_buffers;
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buf_read_pos=0;
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fprintf(stderr,"+");fflush(stderr);
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}
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} else {
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eof=1;
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}
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}
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}
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if(FD_ISSET(1, &wfds)){
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fprintf(stderr,"\n%d w",full_buffers);fflush(stderr);
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if(full_buffers==0){
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if(eof){
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// flush buffer!
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int pos=0;
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int len;
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fprintf(stderr,"\nf");fflush(stderr);
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while((len=buf_read_pos-pos)>0){
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len=write(1,buffer[buf_write]+pos,len);
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fprintf(stderr,"(%d)",len);fflush(stderr);
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if(len<=0) break;
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pos+=len;
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}
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exit(1);
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}
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fprintf(stderr," empty");fflush(stderr);
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//empty=1; // we must fill buffers!
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} else {
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// yeah, we can read from the buffer!
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int len=BUFFSIZE-buf_write_pos;
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fprintf(stderr,"W");fflush(stderr);
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len=write(1,buffer[buf_write]+buf_write_pos,len);
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fprintf(stderr,"(%d)",len);fflush(stderr);
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if(len>0){
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buf_write_pos+=len;
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if(buf_write_pos>=BUFFSIZE){
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// block is empty, find next!
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buf_write=(buf_write+1)%NUM_BUFS;
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--full_buffers;
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buf_write_pos=0;
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fprintf(stderr,"-");fflush(stderr);
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can_read=1;
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}
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}
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}
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}
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} else {
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fprintf(stderr,".");fflush(stderr);
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}
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}
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return 0;
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}
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