| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * This file is part of FFmpeg. | ||
| 3 | * | ||
| 4 | * FFmpeg is free software; you can redistribute it and/or | ||
| 5 | * modify it under the terms of the GNU Lesser General Public | ||
| 6 | * License as published by the Free Software Foundation; either | ||
| 7 | * version 2.1 of the License, or (at your option) any later version. | ||
| 8 | * | ||
| 9 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 12 | * Lesser General Public License for more details. | ||
| 13 | * | ||
| 14 | * You should have received a copy of the GNU Lesser General Public | ||
| 15 | * License along with FFmpeg; if not, write to the Free Software | ||
| 16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 17 | */ | ||
| 18 | |||
| 19 | #include "config.h" | ||
| 20 | #include "error.h" | ||
| 21 | #include "file.h" | ||
| 22 | #include "file_open.h" | ||
| 23 | #include "internal.h" | ||
| 24 | #include "log.h" | ||
| 25 | #include "mem.h" | ||
| 26 | #include <fcntl.h> | ||
| 27 | #include <sys/stat.h> | ||
| 28 | #if HAVE_UNISTD_H | ||
| 29 | #include <unistd.h> | ||
| 30 | #endif | ||
| 31 | #if HAVE_IO_H | ||
| 32 | #include <io.h> | ||
| 33 | #endif | ||
| 34 | #if HAVE_MMAP | ||
| 35 | #include <sys/mman.h> | ||
| 36 | #elif HAVE_MAPVIEWOFFILE | ||
| 37 | #include <windows.h> | ||
| 38 | #endif | ||
| 39 | |||
| 40 | typedef struct FileLogContext { | ||
| 41 | const AVClass *class; | ||
| 42 | int log_offset; | ||
| 43 | void *log_ctx; | ||
| 44 | } FileLogContext; | ||
| 45 | |||
| 46 | static const AVClass file_log_ctx_class = { | ||
| 47 | .class_name = "FILE", | ||
| 48 | .item_name = av_default_item_name, | ||
| 49 | .option = NULL, | ||
| 50 | .version = LIBAVUTIL_VERSION_INT, | ||
| 51 | .log_level_offset_offset = offsetof(FileLogContext, log_offset), | ||
| 52 | .parent_log_context_offset = offsetof(FileLogContext, log_ctx), | ||
| 53 | }; | ||
| 54 | |||
| 55 | ✗ | int av_file_map(const char *filename, uint8_t **bufptr, size_t *size, | |
| 56 | int log_offset, void *log_ctx) | ||
| 57 | { | ||
| 58 | ✗ | FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx }; | |
| 59 | ✗ | int err, fd = avpriv_open(filename, O_RDONLY); | |
| 60 | struct stat st; | ||
| 61 | av_unused void *ptr; | ||
| 62 | off_t off_size; | ||
| 63 | char errbuf[128]; | ||
| 64 | ✗ | *bufptr = NULL; | |
| 65 | ✗ | *size = 0; | |
| 66 | |||
| 67 | ✗ | if (fd < 0) { | |
| 68 | ✗ | err = AVERROR(errno); | |
| 69 | ✗ | av_strerror(err, errbuf, sizeof(errbuf)); | |
| 70 | ✗ | av_log(&file_log_ctx, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename, errbuf); | |
| 71 | ✗ | return err; | |
| 72 | } | ||
| 73 | |||
| 74 | ✗ | if (fstat(fd, &st) < 0) { | |
| 75 | ✗ | err = AVERROR(errno); | |
| 76 | ✗ | av_strerror(err, errbuf, sizeof(errbuf)); | |
| 77 | ✗ | av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in fstat(): %s\n", errbuf); | |
| 78 | ✗ | close(fd); | |
| 79 | ✗ | return err; | |
| 80 | } | ||
| 81 | |||
| 82 | ✗ | off_size = st.st_size; | |
| 83 | if (off_size > SIZE_MAX) { | ||
| 84 | av_log(&file_log_ctx, AV_LOG_ERROR, | ||
| 85 | "File size for file '%s' is too big\n", filename); | ||
| 86 | close(fd); | ||
| 87 | return AVERROR(EINVAL); | ||
| 88 | } | ||
| 89 | ✗ | *size = off_size; | |
| 90 | |||
| 91 | ✗ | if (!*size) { | |
| 92 | ✗ | *bufptr = NULL; | |
| 93 | ✗ | goto out; | |
| 94 | } | ||
| 95 | |||
| 96 | #if HAVE_MMAP | ||
| 97 | ✗ | ptr = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0); | |
| 98 | ✗ | if (ptr == MAP_FAILED) { | |
| 99 | ✗ | err = AVERROR(errno); | |
| 100 | ✗ | av_strerror(err, errbuf, sizeof(errbuf)); | |
| 101 | ✗ | av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in mmap(): %s\n", errbuf); | |
| 102 | ✗ | close(fd); | |
| 103 | ✗ | *size = 0; | |
| 104 | ✗ | return err; | |
| 105 | } | ||
| 106 | ✗ | *bufptr = ptr; | |
| 107 | #elif HAVE_MAPVIEWOFFILE | ||
| 108 | { | ||
| 109 | HANDLE mh, fh = (HANDLE)_get_osfhandle(fd); | ||
| 110 | |||
| 111 | mh = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 0, NULL); | ||
| 112 | if (!mh) { | ||
| 113 | av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in CreateFileMapping()\n"); | ||
| 114 | close(fd); | ||
| 115 | *size = 0; | ||
| 116 | return -1; | ||
| 117 | } | ||
| 118 | |||
| 119 | ptr = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, *size); | ||
| 120 | CloseHandle(mh); | ||
| 121 | if (!ptr) { | ||
| 122 | av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in MapViewOfFile()\n"); | ||
| 123 | close(fd); | ||
| 124 | *size = 0; | ||
| 125 | return -1; | ||
| 126 | } | ||
| 127 | |||
| 128 | *bufptr = ptr; | ||
| 129 | } | ||
| 130 | #else | ||
| 131 | *bufptr = av_malloc(*size); | ||
| 132 | if (!*bufptr) { | ||
| 133 | av_log(&file_log_ctx, AV_LOG_ERROR, "Memory allocation error occurred\n"); | ||
| 134 | close(fd); | ||
| 135 | *size = 0; | ||
| 136 | return AVERROR(ENOMEM); | ||
| 137 | } | ||
| 138 | read(fd, *bufptr, *size); | ||
| 139 | #endif | ||
| 140 | |||
| 141 | ✗ | out: | |
| 142 | ✗ | close(fd); | |
| 143 | ✗ | return 0; | |
| 144 | } | ||
| 145 | |||
| 146 | 1 | void av_file_unmap(uint8_t *bufptr, size_t size) | |
| 147 | { | ||
| 148 |
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1 | if (!size || !bufptr) |
| 149 | 1 | return; | |
| 150 | #if HAVE_MMAP | ||
| 151 | ✗ | munmap(bufptr, size); | |
| 152 | #elif HAVE_MAPVIEWOFFILE | ||
| 153 | UnmapViewOfFile(bufptr); | ||
| 154 | #else | ||
| 155 | av_free(bufptr); | ||
| 156 | #endif | ||
| 157 | } | ||
| 158 |