/* * Buffered file io for ffmpeg system * Copyright (c) 2001 Fabrice Bellard * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/avstring.h" #include "avformat.h" #include <fcntl.h> #if HAVE_SETMODE #include <io.h> #endif #include <unistd.h> #include <sys/stat.h> #include <stdlib.h> #include "os_support.h" #include "url.h" /* standard file protocol */ static int file_read(URLContext *h, unsigned char *buf, int size) { int fd = (intptr_t) h->priv_data; int r = read(fd, buf, size); return (-1 == r)?AVERROR(errno):r; } static int file_write(URLContext *h, const unsigned char *buf, int size) { int fd = (intptr_t) h->priv_data; int r = write(fd, buf, size); return (-1 == r)?AVERROR(errno):r; } static int file_get_handle(URLContext *h) { return (intptr_t) h->priv_data; } static int file_check(URLContext *h, int mask) { struct stat st; int ret = stat(h->filename, &st); if (ret < 0) return AVERROR(errno); ret |= st.st_mode&S_IRUSR ? mask&AVIO_FLAG_READ : 0; ret |= st.st_mode&S_IWUSR ? mask&AVIO_FLAG_WRITE : 0; return ret; } #if CONFIG_FILE_PROTOCOL static int file_open(URLContext *h, const char *filename, int flags) { int access; int fd; av_strstart(filename, "file:", &filename); if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) { access = O_CREAT | O_TRUNC | O_RDWR; } else if (flags & AVIO_FLAG_WRITE) { access = O_CREAT | O_TRUNC | O_WRONLY; } else { access = O_RDONLY; } #ifdef O_BINARY access |= O_BINARY; #endif fd = open(filename, access, 0666); if (fd == -1) return AVERROR(errno); h->priv_data = (void *) (intptr_t) fd; return 0; } /* XXX: use llseek */ static int64_t file_seek(URLContext *h, int64_t pos, int whence) { int fd = (intptr_t) h->priv_data; if (whence == AVSEEK_SIZE) { struct stat st; int ret = fstat(fd, &st); return ret < 0 ? AVERROR(errno) : st.st_size; } return lseek(fd, pos, whence); } static int file_close(URLContext *h) { int fd = (intptr_t) h->priv_data; return close(fd); } URLProtocol ff_file_protocol = { .name = "file", .url_open = file_open, .url_read = file_read, .url_write = file_write, .url_seek = file_seek, .url_close = file_close, .url_get_file_handle = file_get_handle, .url_check = file_check, }; #endif /* CONFIG_FILE_PROTOCOL */ #if CONFIG_PIPE_PROTOCOL static int pipe_open(URLContext *h, const char *filename, int flags) { int fd; char *final; av_strstart(filename, "pipe:", &filename); fd = strtol(filename, &final, 10); if((filename == final) || *final ) {/* No digits found, or something like 10ab */ if (flags & AVIO_FLAG_WRITE) { fd = 1; } else { fd = 0; } } #if HAVE_SETMODE setmode(fd, O_BINARY); #endif h->priv_data = (void *) (intptr_t) fd; h->is_streamed = 1; return 0; } URLProtocol ff_pipe_protocol = { .name = "pipe", .url_open = pipe_open, .url_read = file_read, .url_write = file_write, .url_get_file_handle = file_get_handle, .url_check = file_check, }; #endif /* CONFIG_PIPE_PROTOCOL */