node-taglib-sharp / Exports / RiffBitmapInfoHeader
This class provides a representation of a Microsoft BitmapInfoHeader structure which provides information about the dimensions and color format of a device-independent bitmap.
Link
https://docs.microsoft.com/en-us/windows/win32/api/wingdi/ns-wingdi-bitmapinfoheader
- bitCount
- colorsUsed
- compressionId
- description
- durationMilliseconds
- imageSize
- importantColors
- mediaTypes
- planes
- videoHeight
- videoWidth
- xPixelsPerMeter
- yPixelsPerMeter
• new RiffBitmapInfoHeader(data, offset)
Constructs and initializes a new instance by reading the raw structure from a specified position in the provided ByteVector.
| Name | Type | Description |
|---|---|---|
data |
ByteVector |
ByteVector containing the raw data structure |
offset |
number |
Index into data where the raw bitmap info header begins. Must be a positive, 32-bit integer. |
▪ Static Readonly FOURCC_CODES: Map<number, string>
List of well known FOURCC codes and what they correspond to.
Remarks
This list was cobbled together using * The original .NET source * https://omiod.com/codec/list.php * https://www.fourcc.org/ * http://abcavi.kibi.ru/fourcc.php If any FOURCCs are missing or wrong, submit a PR and include a link to some source saying this FOURCC exists.
• get bitCount(): number
Gets the number of bits per pixel (bpp). For uncompressed formats, this value is the average number of bits per pixel. For compressed formats, this value is the implied bit depth of the uncompressed image, after the image has been decoded.
number
• get colorsUsed(): number
Gets the number of color indices in the color table that are actually used by the bitmap.
number
• get compressionId(): number
Gets the compression ID for the image.
Remarks
For compressed video and YUV formats, this is a FOURCC code, specified as a DWORD in
little-endian order. For more information, see
https://docs.microsoft.com/en-us/windows/win32/directshow/fourcc-codes and
https://www.fourcc.org/fourcc.php. For uncompressed RGB formats, the following
values are possible:
* BI_RGB = 0x00000000 => Uncompressed RGB
* BI_BITFIELDS = 0x00000003 => Uncompressed RGB with color masks, valid for 16 and
32 bpp bitmaps.
[description](RiffBitmapInfoHeader.md#description) makes a best-guess attempt to determine the name of the compression
codec used.
number
• get description(): string
Gets a text description of the media represented by the current instance.
string
• get durationMilliseconds(): number
Duration of the media in milliseconds represented by the current instance.
Remarks
The duration is not known from the video codec in a RIFF format file.
number
IVideoCodec.durationMilliseconds
• get imageSize(): number
Gets the size, in bytes, of the image. This can be set to 0 for uncompressed RGB bitmaps.
number
• get importantColors(): number
Gets the number of color indices that are considered important for displaying the bitmap. If
this value is 0, all colors are important.
number
• get mediaTypes(): MediaTypes
Types of media represented by the current instance, bitwise combined.
• get planes(): number
Gets the number of planes in the image. This value is pretty much universally set to 1.
number
• get videoHeight(): number
Height of the video in pixels represented by the current instance.
number
• get videoWidth(): number
Width of the video in pixels represented by the current instance.
number
• get xPixelsPerMeter(): number
Gets the horizontal resolution, in pixels per meter, of the target device for the bitmap.
number
• get yPixelsPerMeter(): number
Gets the vertical resolution, in pixels per meter, of the target device for the bitmap.
number