mirror of
https://github.com/xenia-project/FFmpeg.git
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976a8b2179
* qatar/master: (40 commits) H.264: template left MB handling H.264: faster fill_decode_caches H.264: faster write_back_* H.264: faster fill_filter_caches H.264: make filter_mb_fast support the case of unavailable top mb Do not include log.h in avutil.h Do not include pixfmt.h in avutil.h Do not include rational.h in avutil.h Do not include mathematics.h in avutil.h Do not include intfloat_readwrite.h in avutil.h Remove return statements following infinite loops without break RTSP: Doxygen comment cleanup doxygen: Escape '\' in Doxygen documentation. md5: cosmetics md5: use AV_WL32 to write result md5: add fate test md5: include correct headers md5: fix test program doxygen: Drop array size declarations from Doxygen parameter names. doxygen: Fix parameter names to match the function prototypes. ... Conflicts: libavcodec/x86/dsputil_mmx.c libavformat/flvenc.c libavformat/oggenc.c libavformat/wtv.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "file.h"
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#include "log.h"
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#if HAVE_MMAP
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#include <sys/mman.h>
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#elif HAVE_MAPVIEWOFFILE
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#include <io.h>
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#include <windows.h>
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#endif
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typedef struct {
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const AVClass *class;
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int log_offset;
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void *log_ctx;
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} FileLogContext;
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static const AVClass file_log_ctx_class = {
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"FILE", av_default_item_name, NULL, LIBAVUTIL_VERSION_INT,
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offsetof(FileLogContext, log_offset), offsetof(FileLogContext, log_ctx)
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};
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int av_file_map(const char *filename, uint8_t **bufptr, size_t *size,
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int log_offset, void *log_ctx)
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{
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FileLogContext file_log_ctx = { &file_log_ctx_class, log_offset, log_ctx };
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int err, fd = open(filename, O_RDONLY);
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struct stat st;
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av_unused void *ptr;
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off_t off_size;
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char errbuf[128];
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*bufptr = NULL;
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if (fd < 0) {
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err = AVERROR(errno);
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av_strerror(err, errbuf, sizeof(errbuf));
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av_log(&file_log_ctx, AV_LOG_ERROR, "Cannot read file '%s': %s\n", filename, errbuf);
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return err;
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}
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if (fstat(fd, &st) < 0) {
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err = AVERROR(errno);
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av_strerror(err, errbuf, sizeof(errbuf));
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av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in fstat(): %s\n", errbuf);
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close(fd);
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return err;
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}
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off_size = st.st_size;
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if (off_size > SIZE_MAX) {
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av_log(&file_log_ctx, AV_LOG_ERROR,
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"File size for file '%s' is too big\n", filename);
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close(fd);
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return AVERROR(EINVAL);
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}
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*size = off_size;
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#if HAVE_MMAP
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ptr = mmap(NULL, *size, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
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if (ptr == MAP_FAILED) {
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err = AVERROR(errno);
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av_strerror(err, errbuf, sizeof(errbuf));
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av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in mmap(): %s\n", errbuf);
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close(fd);
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return err;
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}
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*bufptr = ptr;
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#elif HAVE_MAPVIEWOFFILE
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{
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HANDLE mh, fh = (HANDLE)_get_osfhandle(fd);
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mh = CreateFileMapping(fh, NULL, PAGE_READONLY, 0, 0, NULL);
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if (!mh) {
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av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in CreateFileMapping()\n");
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close(fd);
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return -1;
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}
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ptr = MapViewOfFile(mh, FILE_MAP_READ, 0, 0, *size);
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CloseHandle(mh);
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if (!ptr) {
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av_log(&file_log_ctx, AV_LOG_ERROR, "Error occurred in MapViewOfFile()\n");
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close(fd);
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return -1;
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}
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*bufptr = ptr;
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}
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#else
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*bufptr = av_malloc(*size);
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if (!*bufptr) {
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av_log(&file_log_ctx, AV_LOG_ERROR, "Memory allocation error occurred\n");
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close(fd);
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return AVERROR(ENOMEM);
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}
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read(fd, *bufptr, *size);
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#endif
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close(fd);
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return 0;
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}
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void av_file_unmap(uint8_t *bufptr, size_t size)
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{
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#if HAVE_MMAP
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munmap(bufptr, size);
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#elif HAVE_MAPVIEWOFFILE
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UnmapViewOfFile(bufptr);
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#else
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av_free(bufptr);
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#endif
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}
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#ifdef TEST
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#undef printf
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int main(void)
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{
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uint8_t *buf;
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size_t size;
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if (av_file_map("file.c", &buf, &size, 0, NULL) < 0)
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return 1;
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buf[0] = 's';
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printf("%s", buf);
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av_file_unmap(buf, size);
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return 0;
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}
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#endif
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