roar_vs_file(3) 					   RoarAudio Programmer's Manual					   roar_vs_file(3)

NAME

       roar_vs_file, roar_vs_file_simple, roar_vs_new_from_file - File mode for VS API

SYNOPSIS

       #include <roaraudio.h>

       int roar_vs_file(roar_vs_t * vss, struct roar_vio_calls * vio, int closefile, int * error);

       int roar_vs_file_simple(roar_vs_t * vss, char * filename, int * error);

       roar_vs_t * roar_vs_new_from_file(const char * server, const char * name, char * filename, int * error);

DESCRIPTION

       These  functions  are  used  to	open  the VS object in file mode. In the file mode the VS API reads or writes the data from or to the file
       itself. The file mode uses normal VIO/DSTR so it supports streams as well. Just pass the stream URL as filename.

       roar_vs_file() sets up the file mode for a already opened object using the open	VIO  handle  vio.   This  function  requires  the  use	of
       roar_vs_stream(3).

       roar_vs_file_simple()  sets  up	the  file  mode using a given filename (or URL). It opens the file using DSTR API. By default the function
       assumes playback mode and tries to auto detect the audio parameters.  To override the auto detection or use a diffrent stream direction use
       roar_vs_stream(3).

       roar_vs_new_from_file() creates a new VS object and enters file mode using the file (or URL) given as filename.

       To send data to or read data from use roar_vs_iterate(3) or roar_vs_run(3).

PARAMETERS

       server The server to connect to. NULL for defaults.

       name   The  application	name.  This  should  be  something the user can use to identify the application.  It MUST NOT be the application's
	      binary name or the value of argv[0].

       vio    The VIO handle to be used by the file mode.

       closefile
	      This parameter tells the file mode  if  the  file  should  be  closed  on  roar_vio_close(3).   Must  be	ROAR_VS_TRUE  (common)	or
	      ROAR_VS_FALSE.

       filename
	      The  filename  used to open the file for file mode. The file is opend using DSTR API.  All kinds of files supported by DSTR are sup-
	      ported. This includes HTTP streams.

       error  This is a pointer to a integer used to store the error value in case of error.  This can be NULL if not used but it is  very  recom-
	      mended to use this error value to report good error messages to the user.

RETURN VALUE

       On success roar_vs_new_from_file() return a new VS object.  On error, NULL is returned.	roar_vs_file() and roar_vs_file_simple() returns 0
       on success and -1 on error.

EXAMPLES

	roar_vs_t * vss;
	int err;

	vss = roar_vs_new_from_file(NULL, "MyApp", "http://...", &err);
	if ( vss == NULL ) {
	 //handle error.
	}

	if ( roar_vs_run(vss, &err) == -1 ) {
	 //handle error.
	}

	if ( roar_vs_close(vss, ROAR_VS_FALSE, &err) == -1 ) {
	 //handle error.
	}

SEE ALSO

       roar_vs_new_simple(3), roar_vs_iterate(3), roar_vs_run(3), roar_vs_close(3), roarvs(7), libroar(7), RoarAudio(7).

RoarAudio							     June 2011							   roar_vs_file(3)