mirror of
https://github.com/mpv-player/mpv
synced 2024-12-22 23:02:37 +00:00
0792847d4a
Make the file protocol read up to 64 KiB at once when the cache is used, assuming that files will generally be readable with high bandwidth. This should improve performance when playing e.g. from high-latency network shares. git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32616 b3059339-0415-0410-9bf9-f77b7e298cf2
206 lines
5.1 KiB
C
206 lines
5.1 KiB
C
/*
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* This file is part of MPlayer.
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*
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* MPlayer is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* MPlayer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with MPlayer; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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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 "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 HAVE_DOS_PATHS
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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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m |= O_BINARY;
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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,"Reading from stdin...\n");
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f=0; // 0=stdin
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#if HAVE_SETMODE
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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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#if HAVE_SETMODE
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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,"File not found: '%s'\n",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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// seeks on stdin incorrectly succeed on MinGW
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if(f==0)
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len = -1;
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#endif
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if(len == -1) {
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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 |= MP_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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stream->read_chunk = 64*1024;
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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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