mirror of
https://github.com/mpv-player/mpv
synced 2024-09-09 01:16:56 +02:00
194 lines
4.8 KiB
C
194 lines
4.8 KiB
C
/*
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* This file is part of MPlayer.
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*
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* Original authors: Albeu, probably Arpi
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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 <errno.h>
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#include "osdep/io.h"
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#include "mpvcore/mp_msg.h"
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#include "stream.h"
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#include "mpvcore/m_option.h"
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struct priv {
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int fd;
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bool close;
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};
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static int fill_buffer(stream_t *s, char *buffer, int max_len)
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{
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struct priv *p = s->priv;
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int r = read(p->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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{
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struct priv *p = s->priv;
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int r;
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int wr = 0;
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while (wr < len) {
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r = write(p->fd, buffer, len);
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if (r <= 0)
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return -1;
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wr += r;
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buffer += r;
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}
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return len;
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}
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static int seek(stream_t *s, int64_t newpos)
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{
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struct priv *p = s->priv;
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return lseek(p->fd, newpos, SEEK_SET) != (off_t)-1;
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}
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static int control(stream_t *s, int cmd, void *arg)
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{
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struct priv *p = s->priv;
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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(p->fd, 0, SEEK_END);
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lseek(p->fd, s->pos, SEEK_SET);
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if (size != (off_t)-1) {
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*(uint64_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 void s_close(stream_t *s)
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{
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struct priv *p = s->priv;
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if (p->close && p->fd >= 0)
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close(p->fd);
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}
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static int open_f(stream_t *stream, int mode)
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{
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int fd;
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char *filename = stream->path;
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struct priv *priv = talloc_ptrtype(stream, priv);
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*priv = (struct priv) {
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.fd = -1
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};
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stream->priv = priv;
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int m = O_CLOEXEC;
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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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return STREAM_UNSUPPORTED;
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}
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// "file://" prefix -> decode URL-style escapes
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if (strlen(stream->url) > strlen(stream->path))
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mp_url_unescape_inplace(stream->path);
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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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if (!strcmp(filename, "-")) {
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if (mode == STREAM_READ) {
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mp_tmsg(MSGT_OPEN, MSGL_INFO, "Reading from stdin...\n");
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fd = 0;
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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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fd = 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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priv->fd = fd;
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priv->close = false;
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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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fd = open(filename, m | O_BINARY, openmode);
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if (fd < 0) {
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mp_tmsg(MSGT_OPEN, MSGL_ERR, "Cannot open file '%s': %s\n",
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filename, strerror(errno));
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return STREAM_ERROR;
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}
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#ifndef __MINGW32__
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struct stat st;
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if (fstat(fd, &st) == 0 && S_ISDIR(st.st_mode)) {
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mp_tmsg(MSGT_OPEN, MSGL_ERR, "File is a directory: '%s'\n",
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filename);
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close(fd);
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return STREAM_ERROR;
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}
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#endif
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priv->fd = fd;
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priv->close = true;
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}
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int64_t len = lseek(fd, 0, SEEK_END);
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lseek(fd, 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 (fd == 0)
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len = -1;
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#endif
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stream->type = STREAMTYPE_FILE;
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stream->flags = MP_STREAM_FAST_SKIPPING;
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if (len >= 0) {
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stream->seek = seek;
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stream->end_pos = len;
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}
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mp_msg(MSGT_OPEN, MSGL_V, "[file] File size is %" PRId64 " bytes\n", len);
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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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stream->close = s_close;
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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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.name = "file",
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.open = open_f,
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.protocols = (const char*[]){ "file", "", NULL },
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};
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