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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "osdep/io.h"
#include "core/mp_msg.h"
#include "stream.h"
#include "core/m_option.h"
#include "core/m_struct.h"
static struct stream_priv_s {
char* filename;
char *filename2;
} stream_priv_dflts = {
NULL, NULL
};
#define ST_OFF(f) M_ST_OFF(struct stream_priv_s,f)
/// URL definition
static const m_option_t stream_opts_fields[] = {
{"string", ST_OFF(filename), CONF_TYPE_STRING, 0, 0 ,0, NULL},
{"filename", ST_OFF(filename2), CONF_TYPE_STRING, 0, 0 ,0, NULL},
{ NULL, NULL, 0, 0, 0, 0, NULL }
};
static const struct m_struct_st stream_opts = {
"file",
sizeof(struct stream_priv_s),
&stream_priv_dflts,
stream_opts_fields
};
static int fill_buffer(stream_t *s, char* buffer, int max_len){
int r = read(s->fd,buffer,max_len);
// We are certain this is EOF, do not retry
if (max_len && r == 0) s->eof = 1;
return (r <= 0) ? -1 : r;
}
static int write_buffer(stream_t *s, char* buffer, int len) {
int r;
int wr = 0;
while (wr < len) {
r = write(s->fd,buffer,len);
if (r <= 0)
return -1;
wr += r;
buffer += r;
}
return len;
}
static int seek(stream_t *s,int64_t newpos) {
s->pos = newpos;
if(lseek(s->fd,s->pos,SEEK_SET)<0) {
s->eof=1;
return 0;
}
return 1;
}
static int seek_forward(stream_t *s,int64_t newpos) {
if(newpos<s->pos){
mp_msg(MSGT_STREAM,MSGL_INFO,"Cannot seek backward in linear streams!\n");
return 0;
}
while(s->pos<newpos){
int len=s->fill_buffer(s,s->buffer,STREAM_BUFFER_SIZE);
if(len<=0){ s->eof=1; s->buf_pos=s->buf_len=0; break; } // EOF
s->buf_pos=0;
s->buf_len=len;
s->pos+=len;
}
return 1;
}
static int control(stream_t *s, int cmd, void *arg) {
switch(cmd) {
case STREAM_CTRL_GET_SIZE: {
off_t size;
size = lseek(s->fd, 0, SEEK_END);
lseek(s->fd, s->pos, SEEK_SET);
if(size != (off_t)-1) {
*(uint64_t*)arg = size;
return 1;
}
}
}
return STREAM_UNSUPPORTED;
}
static int open_f(stream_t *stream,int mode, void* opts, int* file_format) {
int f;
mode_t m = 0;
int64_t len;
unsigned char *filename;
struct stream_priv_s* p = (struct stream_priv_s*)opts;
if(mode == STREAM_READ)
m = O_RDONLY;
else if(mode == STREAM_WRITE)
m = O_RDWR|O_CREAT|O_TRUNC;
else {
mp_msg(MSGT_OPEN,MSGL_ERR, "[file] Unknown open mode %d\n",mode);
m_struct_free(&stream_opts,opts);
return STREAM_UNSUPPORTED;
}
if(p->filename)
filename = p->filename;
else if(p->filename2)
filename = p->filename2;
else
filename = NULL;
if(!filename) {
mp_msg(MSGT_OPEN,MSGL_ERR, "[file] No filename\n");
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
#if HAVE_DOS_PATHS
// extract '/' from '/x:/path'
if( filename[ 0 ] == '/' && filename[ 1 ] && filename[ 2 ] == ':' )
filename++;
#endif
m |= O_BINARY;
if(!strcmp(filename,"-")){
if(mode == STREAM_READ) {
// read from stdin
mp_tmsg(MSGT_OPEN,MSGL_INFO,"Reading from stdin...\n");
f=0; // 0=stdin
#if HAVE_SETMODE
setmode(fileno(stdin),O_BINARY);
#endif
} else {
mp_msg(MSGT_OPEN,MSGL_INFO,"Writing to stdout\n");
f=1;
#if HAVE_SETMODE
setmode(fileno(stdout),O_BINARY);
#endif
}
} else {
mode_t openmode = S_IRUSR|S_IWUSR;
#ifndef __MINGW32__
openmode |= S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH;
#endif
f=open(filename,m, openmode);
if(f<0) {
mp_tmsg(MSGT_OPEN, MSGL_ERR, "Cannot open file '%s': %s\n", filename,
strerror(errno));
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
#ifndef __MINGW32__
struct stat st;
if (fstat(f, &st) == 0 && S_ISDIR(st.st_mode)) {
mp_tmsg(MSGT_OPEN,MSGL_ERR,"File is a directory: '%s'\n",filename);
close(f);
m_struct_free(&stream_opts,opts);
return STREAM_ERROR;
}
#endif
}
len=lseek(f,0,SEEK_END); lseek(f,0,SEEK_SET);
#ifdef __MINGW32__
// seeks on stdin incorrectly succeed on MinGW
if(f==0)
len = -1;
#endif
if(len == -1) {
if(mode == STREAM_READ) stream->seek = seek_forward;
stream->type = STREAMTYPE_STREAM; // Must be move to STREAMTYPE_FILE
stream->flags |= MP_STREAM_SEEK_FW;
} else if(len >= 0) {
stream->seek = seek;
stream->end_pos = len;
stream->type = STREAMTYPE_FILE;
}
mp_msg(MSGT_OPEN,MSGL_V,"[file] File size is %"PRId64" bytes\n", (int64_t)len);
stream->fd = f;
stream->fill_buffer = fill_buffer;
stream->write_buffer = write_buffer;
stream->control = control;
stream->read_chunk = 64*1024;
m_struct_free(&stream_opts,opts);
return STREAM_OK;
}
const stream_info_t stream_info_file = {
"File",
"file",
"Albeu",
"based on the code from ??? (probably Arpi)",
open_f,
{ "file", "", NULL },
&stream_opts,
1 // Urls are an option string
};
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