## MirageDisc MirageDisc — Object representing an optical disc. |

## Functions

gboolean | (*MirageEnumSessionCallback) ()
void | mirage_disc_add_session_by_index ()
gboolean | mirage_disc_add_session_by_number ()
gboolean | mirage_disc_add_track_by_index ()
gboolean | mirage_disc_add_track_by_number ()
gboolean | mirage_disc_enumerate_sessions ()
gboolean | mirage_disc_get_disc_structure ()
void | mirage_disc_get_dpm_data ()
gboolean | mirage_disc_get_dpm_data_for_sector ()
gchar ** | mirage_disc_get_filenames ()
MirageMediumType | mirage_disc_get_medium_type ()
gint | mirage_disc_get_number_of_sessions ()
gint | mirage_disc_get_number_of_tracks ()
MirageSector * | mirage_disc_get_sector ()
MirageSession * | mirage_disc_get_session_after ()
MirageSession * | mirage_disc_get_session_before ()
MirageSession * | mirage_disc_get_session_by_address ()
MirageSession * | mirage_disc_get_session_by_index ()
MirageSession * | mirage_disc_get_session_by_number ()
MirageSession * | mirage_disc_get_session_by_track ()
MirageTrack * | mirage_disc_get_track_by_address ()
MirageTrack * | mirage_disc_get_track_by_index ()
MirageTrack * | mirage_disc_get_track_by_number ()
gboolean | mirage_disc_layout_contains_address ()
gint | mirage_disc_layout_get_first_session ()
gint | mirage_disc_layout_get_first_track ()
gint | mirage_disc_layout_get_length ()
gint | mirage_disc_layout_get_start_sector ()
void | mirage_disc_layout_set_first_session ()
void | mirage_disc_layout_set_first_track ()
void | mirage_disc_layout_set_start_sector ()
gboolean | mirage_disc_put_sector ()
gboolean | mirage_disc_remove_session_by_index ()
gboolean | mirage_disc_remove_session_by_number ()
void | mirage_disc_remove_session_by_object ()
gboolean | mirage_disc_remove_track_by_index ()
gboolean | mirage_disc_remove_track_by_number ()
void | mirage_disc_set_disc_structure ()
void | mirage_disc_set_dpm_data ()
void | mirage_disc_set_filename ()
void | mirage_disc_set_filenames ()
void | mirage_disc_set_medium_type ()

## Signals

void | layout-changed | Run Last

## Types and Values

| MirageDisc
struct | MirageDiscClass
enum | MirageMediumType

## Object Hierarchy

        GObject
        ╰── MirageObject
            ╰── MirageDisc

## Implemented Interfaces

MirageDisc implements MirageContextual.

## Includes

    #include <mirage-disc.h>

## Description

MirageDisc object is a top-level object in the disc layout representation, representing the actual disc.

It provides functions for manipulating the disc layout; adding and removing sessions and tracks, manipulating medium type, and convenience functions for accessing sectors on the disc.

Typically, a MirageDisc is obtained as a result of loading an image using MirageContext and its `mirage_context_load_image()` function.

## Functions

### MirageEnumSessionCallback ()

    gboolean
    (*MirageEnumSessionCallback) (MirageSession *session,
                                  gpointer user_data);

Callback function type used with `mirage_disc_enumerate_sessions()`. A pointer to a session object is stored in `session` , without incrementing its reference counter. `user_data` is user data passed to enumeration function.

#### Parameters

session | session. | [in]
user_data | user data passed to enumeration function. | [in][closure]

#### Returns

`TRUE` on success, otherwise `FALSE`

### mirage_disc_add_session_by_index ()

    void
    mirage_disc_add_session_by_index (MirageDisc *self,
                                      gint index,
                                      MirageSession *session);

Adds session to disc layout.

`index` is the index at which session is added. Negative index denotes index going backwards (i.e. -1 adds session at the end, -2 adds session second-to-last, etc.). If index, either negative or positive, is too big, session is added at the beginning or at the end of the layout, respectively.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
index | index at which session should be added. | [in]
session | a MirageSession to be added. | [in][transfer full]

### mirage_disc_add_session_by_number ()

    gboolean
    mirage_disc_add_session_by_number (MirageDisc *self,
                                       gint number,
                                       MirageSession *session,
                                       GError **error);

Adds session to disc layout.

`number` is session number that should be assigned to added session. It determines session's position in the layout. If session with that number already exists in the layout, the function fails.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
number | session number for the added session. | [in]
session | a MirageSession to be added. | [in][transfer full]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_add_track_by_index ()

    gboolean
    mirage_disc_add_track_by_index (MirageDisc *self,
                                    gint index,
                                    MirageTrack *track,
                                    GError **error);

Adds track to disc layout.

`index` is the index at which track is added. The function attempts to find appropriate session by iterating over sessions list and verifying index ranges, then adds the track using `mirage_session_add_track_by_index()`. Negative `index` denotes index going backwards (i.e. -1 adds track at the end of last session, etc.). If `index` , either negative or positive, is too big, track is respectively added at the beginning of the first or at the end of the last session in the layout.

If disc layout is empty (i.e. contains no sessions), then session is created.

The rest of behavior is same as of `mirage_session_add_track_by_index()`.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
index | index at which track should be added. | [in]
track | a MirageTrack to be added. | [in][transfer full]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_add_track_by_number ()

    gboolean
    mirage_disc_add_track_by_number (MirageDisc *self,
                                     gint number,
                                     MirageTrack *track,
                                     GError **error);

Adds track to disc layout.

`number` is track number that should be assigned to added track. It determines track's position in the layout. The function attempts to find appropriate session using `mirage_disc_get_session_by_track()`, then adds the track using `mirage_session_add_track_by_number()`.

If disc layout is empty (i.e. contains no sessions), then session is created. If `number` is greater than last track's number, the track is added at the end of last session.

The rest of behavior is same as of `mirage_session_add_track_by_number()`.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
number | track number for the added track. | [in]
track | a MirageTrack to be added. | [in][transfer full]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_enumerate_sessions ()

    gboolean
    mirage_disc_enumerate_sessions (MirageDisc *self,
                                    MirageEnumSessionCallback func,
                                    gpointer user_data);

Iterates over sessions list, calling `func` for each session in the layout.

If `func` returns `FALSE`, the function immediately returns `FALSE`.

#### Parameters

self | a MirageDisc |
func | callback function. | [in][scope call][closure user_data]
user_data | data to be passed to callback function. | [in][nullable]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_get_disc_structure ()

    gboolean
    mirage_disc_get_disc_structure (MirageDisc *self,
                                    gint layer,
                                    gint type,
                                    const guint8 **data,
                                    gint *len,
                                    GError **error);

Retrieves disc structure of type `type` from layer `layer` . The pointer to buffer containing the disc structure is stored in `data` ; the buffer belongs to the object and therefore should not be modified.

Disc structures are valid only for DVD and BD discs; therefore, if disc type is not set to `MIRAGE_MEDIUM_DVD` or `MIRAGE_MEDIUM_BD` prior to calling this function, the function will fail.

#### Parameters

self | a MirageDisc |
layer | disc layer. | [in]
type | disc structure type. | [in]
data | location to store buffer containing disc structure data, or `NULL`. | [out][transfer none][optional][array length=len]
len | location to store data length, or `NULL`. | [out][optional]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_get_dpm_data ()

    void
    mirage_disc_get_dpm_data (MirageDisc *self,
                              gint *start,
                              gint *resolution,
                              gint *num_entries,
                              const guint32 **data);

Retrieves DPM data for disc. The pointer to buffer containing DPM data entries is stored in `data` ; the buffer belongs to object and therefore should not be modified.

#### Parameters

self | a MirageDisc |
start | location to store DPM start sector, or `NULL`. | [out][optional]
resolution | location to store DPM data resolution, or `NULL`. | [out][optional]
num_entries | location to store number of DPM entries, or `NULL`. | [out][optional]
data | location to store pointer to buffer containing DPM data, or `NULL`. | [out][optional][array length=num_entries][transfer none]

### mirage_disc_get_dpm_data_for_sector ()

    gboolean
    mirage_disc_get_dpm_data_for_sector (MirageDisc *self,
                                         gint address,
                                         gdouble *angle,
                                         gdouble *density,
                                         GError **error);

Retrieves DPM data for sector at address `address` . Two pieces of data can be retrieved; first one is sector angle, expressed in rotations (i.e. 0.25 would mean 1/4 of rotation or 90˚ and 1.0 means one full rotation or 360˚), and the other one is sector density at given address, expressed in degrees per sector).

#### Parameters

self | a MirageDisc |
address | address of sector to retrieve DPM data for. | [in]
angle | location to store sector angle, or `NULL`. | [out][optional]
density | location to store sector density, or `NULL`. | [out][optional]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_get_filenames ()

    gchar **
    mirage_disc_get_filenames (MirageDisc *self);

Retrieves image filename(s).

#### Parameters

self | a MirageDisc |

#### Returns

pointer to `NULL`-terminated array of filenames. The array belongs to the object and should not be modified.

[transfer none][array zero-terminated=1]

### mirage_disc_get_medium_type ()

    MirageMediumType
    mirage_disc_get_medium_type (MirageDisc *self);

Retrieves medium type.

#### Parameters

self | a MirageDisc |

#### Returns

medium type

### mirage_disc_get_number_of_sessions ()

    gint
    mirage_disc_get_number_of_sessions (MirageDisc *self);

Retrieves number of sessions in the disc layout.

#### Parameters

self | a MirageDisc |

#### Returns

number of sessions

### mirage_disc_get_number_of_tracks ()

    gint
    mirage_disc_get_number_of_tracks (MirageDisc *self);

Retrieves number of tracks in the disc layout.

#### Parameters

self | a MirageDisc |

#### Returns

number of tracks

### mirage_disc_get_sector ()

    MirageSector *
    mirage_disc_get_sector (MirageDisc *self,
                            gint address,
                            GError **error);

Retrieves sector object representing sector at sector address `address` .

This function attempts to retrieve appropriate track using `mirage_disc_get_track_by_address()`, then retrieves sector object using `mirage_track_get_sector()`.

#### Parameters

self | a MirageDisc |
address | sector address. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

sector object on success, `NULL` on failure.

[transfer full]

### mirage_disc_get_session_after ()

    MirageSession *
    mirage_disc_get_session_after (MirageDisc *self,
                                   MirageSession *session,
                                   GError **error);

Retrieves session that comes after `session` .

#### Parameters

self | a MirageDisc |
session | a session. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageSession on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_session_before ()

    MirageSession *
    mirage_disc_get_session_before (MirageDisc *self,
                                    MirageSession *session,
                                    GError **error);

Retrieves session that comes before `session` .

#### Parameters

self | a MirageDisc |
session | a session. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageSession on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_session_by_address ()

    MirageSession *
    mirage_disc_get_session_by_address (MirageDisc *self,
                                        gint address,
                                        GError **error);

Retrieves session by address. `address` must be valid (disc-relative) sector address that is part of the session to be retrieved (i.e. lying between session's start and end sector).

#### Parameters

self | a MirageDisc |
address | address belonging to session to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageSession on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_session_by_index ()

    MirageSession *
    mirage_disc_get_session_by_index (MirageDisc *self,
                                      gint index,
                                      GError **error);

Retrieves session by index. If `index` is negative, sessions from the end of layout are retrieved (e.g. -1 is for last session, -2 for second-to-last session, etc.). If `index` is out of range, regardless of the sign, the function fails.

#### Parameters

self | a MirageDisc |
index | index of session to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageSession on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_session_by_number ()

    MirageSession *
    mirage_disc_get_session_by_number (MirageDisc *self,
                                       gint number,
                                       GError **error);

Retrieves session by session number.

#### Parameters

self | a MirageDisc |
number | number of session to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageSession on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_session_by_track ()

    MirageSession *
    mirage_disc_get_session_by_track (MirageDisc *self,
                                      gint track,
                                      GError **error);

Retrieves session by track number. `track` must be valid track number of track that is part of the session.

#### Parameters

self | a MirageDisc |
track | number of track belonging to session to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageSession on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_track_by_address ()

    MirageTrack *
    mirage_disc_get_track_by_address (MirageDisc *self,
                                      gint address,
                                      GError **error);

Retrieves track by address. `address` must be valid (disc-relative) sector address that is part of the track to be retrieved (i.e. lying between track's start and end sector).

The function attempts to find appropriate session using `mirage_disc_get_session_by_address()`, then retrieves the track using `mirage_session_get_track_by_address()`.

The rest of behavior is same as of `mirage_session_get_track_by_address()`.

#### Parameters

self | a MirageDisc |
address | address belonging to track to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageTrack on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_track_by_index ()

    MirageTrack *
    mirage_disc_get_track_by_index (MirageDisc *self,
                                    gint index,
                                    GError **error);

Retrieves track by index. The function attempts to find appropriate session by iterating over sessions list and verifying index ranges, then retrieves the track using `mirage_session_get_track_by_index()`. If `index` is negative, tracks from the end of layout are retrieved (e.g. -1 is for last track, -2 for second-to-last track, etc.). If `index` is out of range, regardless of the sign, the function fails.

The rest of behavior is same as of `mirage_session_get_track_by_index()`.

#### Parameters

self | a MirageDisc |
index | index of track to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageTrack on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_get_track_by_number ()

    MirageTrack *
    mirage_disc_get_track_by_number (MirageDisc *self,
                                     gint number,
                                     GError **error);

Retrieves track by track number. The function attempts to find appropriate session using `mirage_disc_get_session_by_track()`, then retrieves the track using `mirage_session_get_track_by_number()`.

The rest of behavior is same as of `mirage_session_get_track_by_number()`.

#### Parameters

self | a MirageDisc |
number | track number of track to be retrieved. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

a MirageTrack on success, `NULL` on failure. The reference to the object should be released using `g_object_unref()` when no longer needed.

[transfer full]

### mirage_disc_layout_contains_address ()

    gboolean
    mirage_disc_layout_contains_address (MirageDisc *self,
                                         gint address);

Checks whether the disc contains the given address or not.

#### Parameters

self | a MirageDisc |
address | address to be checked |

#### Returns

`TRUE` if `address` falls inside disc, `FALSE` if it does not

### mirage_disc_layout_get_first_session ()

    gint
    mirage_disc_layout_get_first_session (MirageDisc *self);

Retrieves session number of the first session in the disc layout.

Intended for internal use only.

#### Parameters

self | a MirageDisc |

#### Returns

first session number

### mirage_disc_layout_get_first_track ()

    gint
    mirage_disc_layout_get_first_track (MirageDisc *self);

Retrieves track number of the first track in the disc layout.

Intended for internal use only.

#### Parameters

self | a MirageDisc |

#### Returns

first track number

### mirage_disc_layout_get_length ()

    gint
    mirage_disc_layout_get_length (MirageDisc *self);

Retrieves length of the disc layout. The returned length is given in sectors.

#### Parameters

self | a MirageDisc |

#### Returns

disc layout length

### mirage_disc_layout_get_start_sector ()

    gint
    mirage_disc_layout_get_start_sector (MirageDisc *self);

Retrieves start sector of the disc layout.

Intended for internal use only.

#### Parameters

self | a MirageDisc |

#### Returns

start sector

### mirage_disc_layout_set_first_session ()

    void
    mirage_disc_layout_set_first_session (MirageDisc *self,
                                          gint first_session);

Sets first session number to `first_session` . This is a number that is assigned to the first session in the disc layout.

Intended for internal use only.
Causes top-down change.

#### Parameters

self | a MirageDisc |
first_session | first session number. | [in]

### mirage_disc_layout_set_first_track ()

    void
    mirage_disc_layout_set_first_track (MirageDisc *self,
                                        gint first_track);

Sets first track number to `first_track` . This is a number that is assigned to the first track in the disc layout.

Intended for internal use only.
Causes top-down change.

#### Parameters

self | a MirageDisc |
first_track | first track number. | [in]

### mirage_disc_layout_set_start_sector ()

    void
    mirage_disc_layout_set_start_sector (MirageDisc *self,
                                         gint start_sector);

Sets start sector of the disc layout to `start_sector` . This is a sector at which the first session (and consequently first track) in the disc layout will start.

Intended for internal use only.
Causes top-down change.

#### Parameters

self | a MirageDisc |
start_sector | start sector. | [in]

### mirage_disc_put_sector ()

    gboolean
    mirage_disc_put_sector (MirageDisc *self,
                            MirageSector *sector,
                            GError **error);

Writes the `sector` to disc.

This function attempts to retrieve appropriate track using `mirage_disc_get_track_by_address()`, then writes sector object using `mirage_track_put_sector()`; therefore, same restrictions regarding sector address apply as when putting sector directly to track.

#### Parameters

self | a MirageDisc |
sector | a MirageSector representing sector to be written. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure.

### mirage_disc_remove_session_by_index ()

    gboolean
    mirage_disc_remove_session_by_index (MirageDisc *self,
                                         gint index,
                                         GError **error);

Removes session from disc layout.

`index` is the index of the session to be removed. This function calls `mirage_disc_get_session_by_index()` so `index` behavior is determined by that function.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
index | index of session to be removed. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_remove_session_by_number ()

    gboolean
    mirage_disc_remove_session_by_number (MirageDisc *self,
                                          gint number,
                                          GError **error);

Removes session from disc layout.

`number` is session number of the session to be removed.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
number | session number of session to be removed. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_remove_session_by_object ()

    void
    mirage_disc_remove_session_by_object (MirageDisc *self,
                                          MirageSession *session);

Removes session from disc layout.

`session` is a MirageSession object to be removed.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
session | session object to be removed. | [in]

### mirage_disc_remove_track_by_index ()

    gboolean
    mirage_disc_remove_track_by_index (MirageDisc *self,
                                       gint index,
                                       GError **error);

Removes track from disc layout.

`index` is the index of the track to be removed. This function calls `mirage_disc_get_track_by_index()` so `index` behavior is determined by that function.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
index | index of track to be removed. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_remove_track_by_number ()

    gboolean
    mirage_disc_remove_track_by_number (MirageDisc *self,
                                        gint number,
                                        GError **error);

Removes track from disc layout.

`number` is track number of the track to be removed. This function calls `mirage_disc_get_track_by_number()` so `number` behavior is determined by that function.

Causes bottom-up change.

#### Parameters

self | a MirageDisc |
number | track number of track to be removed. | [in]
error | location to store error, or `NULL`. | [out][optional]

#### Returns

`TRUE` on success, `FALSE` on failure

### mirage_disc_set_disc_structure ()

    void
    mirage_disc_set_disc_structure (MirageDisc *self,
                                    gint layer,
                                    gint type,
                                    const guint8 *data,
                                    gint len);

Sets disc structure of type `type` to layer `layer` to disc. `data` is buffer containing disc structure data and `len` is data length.

Disc structures are valid only for DVD and BD discs. This function silently fails on invalid disc types.

#### Parameters

self | a MirageDisc |
layer | disc layer. | [in]
type | disc structure type. | [in]
data | disc structure data to be set. | [in][array length=len]
len | length of disc structure data. | [in]

### mirage_disc_set_dpm_data ()

    void
    mirage_disc_set_dpm_data (MirageDisc *self,
                              gint start,
                              gint resolution,
                              gint num_entries,
                              const guint32 *data);

Sets the DPM data for disc. If `num_entries` is not positive, DPM data is reset. `start` is the address at which DPM data begins, `resolution` is resolution of DPM data and `num_entries` is the number of DPM entries in buffer pointed to by `data` .

#### Parameters

self | a MirageDisc |
start | DPM start sector. | [in]
resolution | DPM data resolution. | [in]
num_entries | number of DPM entries. | [in]
data | buffer containing DPM data. | [in][array length=num_entries]

### mirage_disc_set_filename ()

    void
    mirage_disc_set_filename (MirageDisc *self,
                              const gchar *filename);

Sets image filename. The functionality is similar to `mirage_disc_set_filenames()`, except that only one filename is set. It is intended to be used in parsers which support only single-file images.

Intended for internal use only, in image parser implementations.

#### Parameters

self | a MirageDisc |
filename | filename. | [in]

### mirage_disc_set_filenames ()

    void
    mirage_disc_set_filenames (MirageDisc *self,
                               gchar **filenames);

Sets image filename(s).

Intended for internal use only, in image parser implementations.

#### Parameters

self | a MirageDisc |
filenames | `NULL`-terminated array of filenames. | [in][array zero-terminated=1]

### mirage_disc_set_medium_type ()

    void
    mirage_disc_set_medium_type (MirageDisc *self,
                                 MirageMediumType medium_type);

Sets medium type. `medium_type` must be one of MirageMediumType.

Intended for internal use only.

#### Parameters

self | a MirageDisc |
medium_type | medium type. | [in]

## Types and Values

### MirageDisc

    typedef struct _MirageDisc MirageDisc;

All the fields in the MirageDisc structure are private to the MirageDisc implementation and should never be accessed directly.

### struct MirageDiscClass

    struct MirageDiscClass {
        MirageObjectClass parent_class;
    };

The class structure for the MirageDisc type.

#### Members

### enum MirageMediumType

Medium types.

#### Members

MIRAGE_MEDIUM_CD | CD disc |
MIRAGE_MEDIUM_DVD | DVD disc |
MIRAGE_MEDIUM_BD | BD (Blue-Ray) disc |
MIRAGE_MEDIUM_HD | HD-DVD disc |
MIRAGE_MEDIUM_HDD | Hard-disk |

## Signal Details

### The `“layout-changed”` signal

    void
    user_function (MirageDisc *disc,
                   gpointer    user_data)

Emitted when a layout of MirageDisc changed in a way that causes a bottom-up change.

#### Parameters

disc | a MirageDisc |
user_data | user data set when the signal handler was connected. |

Flags: Run Last

## See Also

MirageSession, MirageTrack, MirageObject, MirageParser, MirageWriter, MirageContext