Bitmap data unit (a PNG image with position and flashing colors). More...

#include "caption-common.h"
#include "caption-data.h"
#include "caption-management.h"

Include dependency graph for caption-superimpose-bitmap.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	CaptionSuperImposeBitmap_t

Typedefs
typedef struct CaptionSuperImposeBitmap_t	CaptionSuperImposeBitmap_t

Functions
CaptionSuperImposeBitmap_t *	caption_superimpose_bitmap_new (const CaptionManagement_t *m)

void	caption_superimpose_bitmap_free (CaptionSuperImposeBitmap_t *cc)

Detailed Description

Bitmap data unit (a PNG image with position and flashing colors).

Author: Jorge Pereira jpere.nosp@m.iran.nosp@m.@gmai.nosp@m.l.co.nosp@m.m

Date: Thu Aug 12 13:49:21 BRT 2010

Reads the data units of type CAPTION_HANDLER_TYPE_BITMAP, following the "bitmap graphics coding" (ARIB STD-B24, Volume 1, Part 3, 6.2, Table 6-1, p. 156): position header, flashing header and the PNG file. The library does not decode the PNG: it validates the signature, reads the size from the IHDR chunk and hands the bytes to be used with any PNG decoder.

Definition in file caption-superimpose-bitmap.h.

Typedef Documentation

◆ CaptionSuperImposeBitmap_t

typedef struct CaptionSuperImposeBitmap_t CaptionSuperImposeBitmap_t

Bitmap data unit.

Function Documentation

◆ caption_superimpose_bitmap_new()

CaptionSuperImposeBitmap_t * caption_superimpose_bitmap_new ( const CaptionManagement_t * m )

Creates the struct from a bitmap data unit.

Parameters

m	Content read by caption_management_load() or caption_management_load_unit(), of type CAPTION_HANDLER_TYPE_BITMAP, with a non-empty data unit.

Returns: The struct, or NULL if out of memory or if the data unit is truncated or the PNG is not valid (signature and IHDR). Free with caption_superimpose_bitmap_free().

◆ caption_superimpose_bitmap_free()

void caption_superimpose_bitmap_free ( CaptionSuperImposeBitmap_t * cc )

Frees the struct created by caption_superimpose_bitmap_new(), including all the items chained in next.