File Source

Reads raw data values in binary format from the specified file. This file can be a file that was captured using a File Sink block, generated with a computer program or saved from an audio editor such as Audacity (using suitable RAW format options).

Parameters
(R): Run-time adjustable


 * File (R)
 * Filename of binary file. Note: The file MUST be on the local computer.

The file size must not be less than 8 bytes, otherwise it gives the following error: "RuntimeError: file is too small"


 * Output Type
 * Because a binary file does not store information about what type of data is in it, we have to tell GNU Radio the format.


 * Repeat (R)
 * Whether or not to repeat the signal, once the end of the file is reached


 * Add Begin Tag (R)
 * Key of a tag to add to the first sample of the stream, and if Repeat is true, the first sample of each repeated copy. The provided expression must create a PMT.  For example,   will create a key that represents the string  .  See Polymorphic_Types_(PMTs) and Stream_Tags for more information.


 * Offset
 * Start offset samples/items after the beginning of the file


 * Length
 * Read only this number of items beginning from offset(offset+len). 0 will read until the end of the file.

Example Flowgraph
This flowgraph can be found at https://github.com/gnuradio/gnuradio/blob/master/gr-dtv/examples/dvbt_rx_8k.grc.



Source Files

 * C++ files
 * https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/lib/file_source_impl.cc


 * Header files
 * https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/lib/file_source_impl.h


 * Public header files
 * https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/include/gnuradio/blocks/file_source.h


 * Block definition
 * https://github.com/gnuradio/gnuradio/blob/master/gr-blocks/grc/blocks_file_source.block.yml