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fysx
75 lines
1.5 KiB
C
75 lines
1.5 KiB
C
/*
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streamdump: Dumping a copy of the input data.
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copyright 2010 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Michael Hipp
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*/
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#include "streamdump.h"
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#include <fcntl.h>
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#include <errno.h>
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#include "debug.h"
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/* Stream dump descriptor. */
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static int dump_fd = -1;
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/* Read data from input, write copy to dump file. */
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static ssize_t dump_read(int fd, void *buf, size_t count)
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{
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ssize_t ret = read(fd, buf, count);
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if(ret > 0 && dump_fd > -1)
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{
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write(dump_fd, buf, ret);
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}
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return ret;
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}
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/* Also mirror seeks, to prevent messed up dumps of seekable streams. */
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static off_t dump_seek(int fd, off_t pos, int whence)
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{
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off_t ret = lseek(fd, pos, whence);
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if(ret >= 0 && dump_fd > -1)
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{
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lseek(dump_fd, pos, whence);
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}
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return ret;
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}
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/* External API... open and close. */
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int dump_open(mpg123_handle *mh)
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{
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int ret;
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if(param.streamdump == NULL) return 0;
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if(!param.quiet) fprintf(stderr, "Note: Dumping stream to %s\n", param.streamdump);
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dump_fd = compat_open(param.streamdump, O_CREAT|O_TRUNC|O_RDWR);
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if(dump_fd < 0)
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{
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error1("Failed to open dump file: %s\n", strerror(errno));
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return -1;
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}
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#ifdef WIN32
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_setmode(dump_fd, _O_BINARY);
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#endif
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ret = mpg123_replace_reader(mh, dump_read, dump_seek);
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if(ret != MPG123_OK)
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{
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error1("Unable to replace reader for stream dump: %s\n", mpg123_strerror(mh));
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dump_close();
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return -1;
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}
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else return 0;
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}
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void dump_close(void)
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{
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if(dump_fd > -1) compat_close(dump_fd);
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dump_fd = -1;
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}
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