diff options
Diffstat (limited to 'gr-blocks/include/gnuradio/blocks/file_source.h')
| -rw-r--r-- | gr-blocks/include/gnuradio/blocks/file_source.h | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/gr-blocks/include/gnuradio/blocks/file_source.h b/gr-blocks/include/gnuradio/blocks/file_source.h index c8138339fd..cd73c97d02 100644 --- a/gr-blocks/include/gnuradio/blocks/file_source.h +++ b/gr-blocks/include/gnuradio/blocks/file_source.h @@ -1,6 +1,6 @@ /* -*- c++ -*- */ /* - * Copyright 2012 Free Software Foundation, Inc. + * Copyright 2012, 2018 Free Software Foundation, Inc. * * This file is part of GNU Radio * @@ -46,32 +46,41 @@ namespace gr { * Opens \p filename as a source of items into a flowgraph. The * data is expected to be in binary format, item after item. The * \p itemsize of the block determines the conversion from bits - * to items. + * to items. The first \p offset items (default 0) will be + * skipped. * * If \p repeat is turned on, the file will repeat the file after * it's reached the end. * - * \param itemsize the size of each item in the file, in bytes - * \param filename name of the file to source from - * \param repeat repeat file from start + * If \p len is non-zero, only items [offset, offset+len) will + * be produced. + * + * \param itemsize the size of each item in the file, in bytes + * \param filename name of the file to source from + * \param repeat repeat file from start + * \param offset begin this many items into file + * \param len produce only items [offset, offset+len) */ - static sptr make(size_t itemsize, const char *filename, bool repeat = false); + static sptr make(size_t itemsize, const char *filename, bool repeat = false, + size_t offset = 0, size_t len = 0); /*! * \brief seek file to \p seek_point relative to \p whence * - * \param seek_point sample offset in file - * \param whence one of SEEK_SET, SEEK_CUR, SEEK_END (man fseek) + * \param seek_point sample offset in file + * \param whence one of SEEK_SET, SEEK_CUR, SEEK_END (man fseek) */ virtual bool seek(long seek_point, int whence) = 0; /*! * \brief Opens a new file. * - * \param filename name of the file to source from - * \param repeat repeat file from start + * \param filename name of the file to source from + * \param repeat repeat file from start + * \param offset begin this many items into file + * \param len produce only items [offset, offset+len) */ - virtual void open(const char *filename, bool repeat) = 0; + virtual void open(const char *filename, bool repeat, size_t offset = 0, size_t len = 0) = 0; /*! * \brief Close the file handle. |