mirror of https://github.com/mpv-player/mpv
190 lines
4.4 KiB
C
190 lines
4.4 KiB
C
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#include "config.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include "mp_msg.h"
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#include "stream.h"
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#include "help_mp.h"
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#include "m_option.h"
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#include "m_struct.h"
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static struct stream_priv_s {
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char* filename;
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char *filename2;
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} stream_priv_dflts = {
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NULL, NULL
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};
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#define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
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/// URL definition
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static const m_option_t stream_opts_fields[] = {
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{"string", ST_OFF(filename), CONF_TYPE_STRING, 0, 0 ,0, NULL},
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{"filename", ST_OFF(filename2), CONF_TYPE_STRING, 0, 0 ,0, NULL},
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{ NULL, NULL, 0, 0, 0, 0, NULL }
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};
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static const struct m_struct_st stream_opts = {
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"file",
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sizeof(struct stream_priv_s),
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&stream_priv_dflts,
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stream_opts_fields
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};
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static int fill_buffer(stream_t *s, char* buffer, int max_len){
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int r = read(s->fd,buffer,max_len);
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return (r <= 0) ? -1 : r;
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}
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static int write_buffer(stream_t *s, char* buffer, int len) {
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int r = write(s->fd,buffer,len);
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return (r <= 0) ? -1 : r;
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}
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static int seek(stream_t *s,off_t newpos) {
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s->pos = newpos;
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if(lseek(s->fd,s->pos,SEEK_SET)<0) {
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s->eof=1;
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return 0;
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}
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return 1;
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}
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static int seek_forward(stream_t *s,off_t newpos) {
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if(newpos<s->pos){
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mp_msg(MSGT_STREAM,MSGL_INFO,"Cannot seek backward in linear streams!\n");
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return 0;
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}
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while(s->pos<newpos){
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int len=s->fill_buffer(s,s->buffer,STREAM_BUFFER_SIZE);
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if(len<=0){ s->eof=1; s->buf_pos=s->buf_len=0; break; } // EOF
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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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}
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return 1;
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}
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static int control(stream_t *s, int cmd, void *arg) {
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switch(cmd) {
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case STREAM_CTRL_GET_SIZE: {
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off_t size;
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size = lseek(s->fd, 0, SEEK_END);
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lseek(s->fd, s->pos, SEEK_SET);
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if(size != (off_t)-1) {
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*((off_t*)arg) = size;
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return 1;
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}
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}
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}
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return STREAM_UNSUPPORTED;
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}
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static int open_f(stream_t *stream,int mode, void* opts, int* file_format) {
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int f;
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mode_t m = 0;
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off_t len;
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unsigned char *filename;
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struct stream_priv_s* p = (struct stream_priv_s*)opts;
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if(mode == STREAM_READ)
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m = O_RDONLY;
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else if(mode == STREAM_WRITE)
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m = O_RDWR|O_CREAT|O_TRUNC;
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else {
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mp_msg(MSGT_OPEN,MSGL_ERR, "[file] Unknown open mode %d\n",mode);
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m_struct_free(&stream_opts,opts);
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return STREAM_UNSUPPORTED;
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}
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if(p->filename)
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filename = p->filename;
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else if(p->filename2)
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filename = p->filename2;
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else
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filename = NULL;
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if(!filename) {
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mp_msg(MSGT_OPEN,MSGL_ERR, "[file] No filename\n");
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m_struct_free(&stream_opts,opts);
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return STREAM_ERROR;
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}
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#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__OS2__)
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// extract '/' from '/x:/path'
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if( filename[ 0 ] == '/' && filename[ 1 ] && filename[ 2 ] == ':' )
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filename++;
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#endif
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#if defined(__CYGWIN__)|| defined(__MINGW32__)
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m |= O_BINARY;
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#endif
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if(!strcmp(filename,"-")){
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if(mode == STREAM_READ) {
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// read from stdin
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mp_tmsg(MSGT_OPEN,MSGL_INFO,MSGTR_ReadSTDIN);
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f=0; // 0=stdin
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#ifdef __MINGW32__
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setmode(fileno(stdin),O_BINARY);
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#endif
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} else {
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mp_msg(MSGT_OPEN,MSGL_INFO,"Writing to stdout\n");
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f=1;
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#ifdef __MINGW32__
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setmode(fileno(stdout),O_BINARY);
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#endif
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}
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} else {
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mode_t openmode = S_IRUSR|S_IWUSR;
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#ifndef __MINGW32__
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openmode |= S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
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#endif
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f=open(filename,m, openmode);
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if(f<0) {
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mp_tmsg(MSGT_OPEN,MSGL_ERR,MSGTR_FileNotFound,filename);
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m_struct_free(&stream_opts,opts);
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return STREAM_ERROR;
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}
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}
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len=lseek(f,0,SEEK_END); lseek(f,0,SEEK_SET);
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#ifdef __MINGW32__
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if(f==0 || len == -1) {
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#else
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if(len == -1) {
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#endif
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if(mode == STREAM_READ) stream->seek = seek_forward;
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stream->type = STREAMTYPE_STREAM; // Must be move to STREAMTYPE_FILE
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stream->flags |= STREAM_SEEK_FW;
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} else if(len >= 0) {
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stream->seek = seek;
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stream->end_pos = len;
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stream->type = STREAMTYPE_FILE;
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}
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mp_msg(MSGT_OPEN,MSGL_V,"[file] File size is %"PRId64" bytes\n", (int64_t)len);
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stream->fd = f;
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stream->fill_buffer = fill_buffer;
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stream->write_buffer = write_buffer;
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stream->control = control;
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m_struct_free(&stream_opts,opts);
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return STREAM_OK;
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}
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const stream_info_t stream_info_file = {
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"File",
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"file",
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"Albeu",
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"based on the code from ??? (probably Arpi)",
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open_f,
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{ "file", "", NULL },
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&stream_opts,
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1 // Urls are an option string
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};
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