roar_vs_blocking(3) RoarAudio Programmer's Manual roar_vs_blocking(3)NAME
roar_vs_blocking - Change blocking mode of VS object
SYNOPSIS
#include <roaraudio.h>
int roar_vs_blocking (roar_vs_t * vss, int val, int * error);
DESCRIPTION
Changes blocking mode of VS object or ask for the current mode if val is set to ROAR_VS_ASK.
PARAMETERS
vss The VS object to be altered.
val Specifies the new state. Value must be ROAR_VS_TRUE, ROAR_VS_FALSE, ROAR_VS_TOGGLE or ROAR_VS_ASK. ROAR_VS_TOGGLE should be
avoided.
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 these calls return the old (current if ROAR_VS_ASK is used) state of the blocking mode. On error, -1 is returned.
EXAMPLES
FIXME
SEE ALSO roarvs(7), libroar(7), RoarAudio(7).
RoarAudio May 2011 roar_vs_blocking(3)
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roar_vs_buffer(3) RoarAudio Programmer's Manual roar_vs_buffer(3)NAME
roar_vs_buffer - Use buffered mode streams
SYNOPSIS
#include <roaraudio.h>
int roar_vs_buffer(roar_vs_t * vss, size_t buffer, int * error);
ssize_t roar_vs_get_avail_read(roar_vs_t * vss, int * error);
ssize_t roar_vs_get_avail_write(roar_vs_t * vss, int * error);
int roar_vs_reset_buffer(roar_vs_t * vss, int writering, int readring, int * error);
DESCRIPTION
These functions controls the buffered mode of the VS object. Using this mode is not recommended.
roar_vs_buffer() initializes the buffered mode. It takes the size for the buffer as argument. The size should be a power of two. Common
values include 2048 and 4096.
roar_vs_get_avail_read() and roar_vs_get_avail_write() return the amount of free space in the read and write buffer.
roar_vs_reset_buffer() resets the read and/or write buffer. This means the data in the buffers is discarded. This does not happen frame
aligned and may result in broken audio.
Buffers are not flushed automaically. To do this use roar_vs_iterate(3) or roar_vs_run(3).
PARAMETERS
vss The VS object to be used.
buffer The size of the buffer to be used in bytes.
writering, readring
Selects the buffer to reset. Must be ROAR_VS_TRUE or ROAR_VS_FALSE.
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 these calls return 0. roar_vs_get_avail_read() and roar_vs_get_avail_write() return the free space in the corresponding buffer.
On error, -1 is returned.
EXAMPLES
FIXME
SEE ALSO roarvs(7), libroar(7), RoarAudio(7).
RoarAudio June 2011 roar_vs_buffer(3)
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