## BtSinkMachine BtSinkMachine — class for signal processing machines with inputs only |

## Synopsis

    #include <libbtcore/core.h>

                        BtSinkMachine;
    enum                BtSinkMachinePatternIndex;
    BtSinkMachine *     bt_sink_machine_new                 (const BtSong * const song,
                                                             const gchar * const id,
                                                             GError **err);

## Object Hierarchy

      GObject
       +----GstObject
             +----GstElement
                   +----GstBin
                         +----BtMachine
                               +----BtSinkMachine

## Implemented Interfaces

BtSinkMachine implements GstChildProxy.

## Description

Sinks are machines that do playback or recording of the song. The sink-machine utilizes the BtSinkBin to transparently switch elements between record (encoding) and playback.

## Details

### BtSinkMachine

    typedef struct _BtSinkMachine BtSinkMachine;

Sub-class of a BtMachine that implements a signal output (a machine with inputs only).

### enum BtSinkMachinePatternIndex

    typedef enum {
      BT_SINK_MACHINE_PATTERN_INDEX_BREAK=0,
      BT_SINK_MACHINE_PATTERN_INDEX_MUTE,
      BT_SINK_MACHINE_PATTERN_INDEX_OFFSET
    } BtSinkMachinePatternIndex;

Use this with `bt_machine_get_pattern_by_index()` to get the command patterns.

`BT_SINK_MACHINE_PATTERN_INDEX_BREAK` | stop the pattern
`BT_SINK_MACHINE_PATTERN_INDEX_MUTE` | mute the machine
`BT_SINK_MACHINE_PATTERN_INDEX_OFFSET` | offset for real pattern ids

### bt_sink_machine_new ()

    BtSinkMachine *     bt_sink_machine_new                 (const BtSong * const song,
                                                             const gchar * const id,
                                                             GError **err);

Create a new instance. The machine is automaticly added to the setup from the given song object. You don't need to add the machine with `bt_setup_add_machine(setup,BT_MACHINE(machine));`. The element used for this machine is BtSinkBin which is configured according to the use-case (playback, recordfing). The playback device is taken from the BtSettings.

`song` : | the song the new instance belongs to
`id` : | the id, we can use to lookup the machine
`err` : | inform about failed instance creation
Returns : | the new instance or `NULL` in case of an error