| typedef enum OMX_IMAGE_CODINGTYPE | OMX_IMAGE_CODINGTYPE |
Enumeration used to define the possible image compression coding.
| typedef struct OMX_IMAGE_PORTDEFINITIONTYPE | OMX_IMAGE_PORTDEFINITIONTYPE |
Data structure used to define an image path. The number of image paths for input and output will vary by type of the image component.
Input (aka Source) : Zero Inputs, one Output, Splitter : One Input, 2 or more Outputs, Processing Element : One Input, one output, Mixer : 2 or more inputs, one output, Output (aka Sink) : One Input, zero outputs.
The PortDefinition structure is used to define all of the parameters necessary for the compliant component to setup an input or an output image path. If additional vendor specific data is required, it should be transmitted to the component using the CustomCommand function. Compliant components will prepopulate this structure with optimal values during the OMX_GetParameter() command.
STRUCT MEMBERS: cMIMEType : MIME type of data for the port pNativeRender : Platform specific reference for a display if a sync, otherwise this field is 0 nFrameWidth : Width of frame to be used on port if uncompressed format is used. Use 0 for unknown, don't care or variable nFrameHeight : Height of frame to be used on port if uncompressed format is used. Use 0 for unknown, don't care or variable nStride : Number of bytes per span of an image (i.e. indicates the number of bytes to get from span N to span N+1, where negative stride indicates the image is bottom up nSliceHeight : Height used when encoding in slices bFlagErrorConcealment : Turns on error concealment if it is supported by the OMX component eCompressionFormat : Compression format used in this instance of the component. When OMX_IMAGE_CodingUnused is specified, eColorFormat is valid eColorFormat : Decompressed format used by this component pNativeWindow : Platform specific reference for a window object if a display sink , otherwise this field is 0x0.
| typedef struct OMX_IMAGE_PARAM_PORTFORMATTYPE | OMX_IMAGE_PARAM_PORTFORMATTYPE |
Port format parameter. This structure is used to enumerate the various data input/output format supported by the port.
STRUCT MEMBERS: nSize : Size of the structure in bytes nVersion : OMX specification version information nPortIndex : Indicates which port to set nIndex : Indicates the enumeration index for the format from 0x0 to N-1 eCompressionFormat : Compression format used in this instance of the component. When OMX_IMAGE_CodingUnused is specified, eColorFormat is valid eColorFormat : Decompressed format used by this component
| typedef enum OMX_IMAGE_FLASHCONTROLTYPE | OMX_IMAGE_FLASHCONTROLTYPE |
Flash control type
ENUMS Torch : Flash forced constantly on
| typedef struct OMX_IMAGE_PARAM_FLASHCONTROLTYPE | OMX_IMAGE_PARAM_FLASHCONTROLTYPE |
Flash control configuration
STRUCT MEMBERS: nSize : Size of the structure in bytes nVersion : OMX specification version information nPortIndex : Port that this structure applies to eFlashControl : Flash control type
| typedef enum OMX_IMAGE_FOCUSCONTROLTYPE | OMX_IMAGE_FOCUSCONTROLTYPE |
Focus control type
| typedef struct OMX_IMAGE_CONFIG_FOCUSCONTROLTYPE | OMX_IMAGE_CONFIG_FOCUSCONTROLTYPE |
Focus control configuration
STRUCT MEMBERS: nSize : Size of the structure in bytes nVersion : OMX specification version information nPortIndex : Port that this structure applies to eFocusControl : Focus control nFocusSteps : Focus can take on values from 0 mm to infinity. Interest is only in number of steps over this range. nFocusStepIndex : Current focus step index
| typedef struct OMX_IMAGE_PARAM_QFACTORTYPE | OMX_IMAGE_PARAM_QFACTORTYPE |
Q Factor for JPEG compression, which controls the tradeoff between image quality and size. Q Factor provides a more simple means of controlling JPEG compression quality, without directly programming Quantization tables for chroma and luma
STRUCT MEMBERS: nSize : Size of the structure in bytes nVersion : OMX specification version information nPortIndex : Port that this structure applies to nQFactor : JPEG Q factor value in the range of 1-100. A factor of 1 produces the smallest, worst quality images, and a factor of 100 produces the largest, best quality images. A typical default is 75 for small good quality images
| typedef enum OMX_IMAGE_QUANTIZATIONTABLETYPE | OMX_IMAGE_QUANTIZATIONTABLETYPE |
Quantization table type
| typedef struct OMX_IMAGE_PARAM_QUANTIZATIONTABLETYPE | OMX_IMAGE_PARAM_QUANTIZATIONTABLETYPE |
JPEG quantization tables are used to determine DCT compression for YUV data, as an alternative to specifying Q factor, providing exact control of compression
STRUCT MEMBERS: nSize : Size of the structure in bytes nVersion : OMX specification version information nPortIndex : Port that this structure applies to eQuantizationTable : Quantization table type nQuantizationMatrix[64] : JPEG quantization table of coefficients stored in increasing columns then by rows of data (i.e. row 1, ... row 8). Quantization values are in the range 0-255 and stored in linear order (i.e. the component will zig-zag the quantization table data if required internally)
| typedef enum OMX_IMAGE_HUFFMANTABLETYPE | OMX_IMAGE_HUFFMANTABLETYPE |
Huffman table type, the same Huffman table is applied for chroma and luma component
| typedef struct OMX_IMAGE_PARAM_HUFFMANTTABLETYPE | OMX_IMAGE_PARAM_HUFFMANTTABLETYPE |
JPEG Huffman table
STRUCT MEMBERS: nSize : Size of the structure in bytes nVersion : OMX specification version information nPortIndex : Port that this structure applies to eHuffmanTable : Huffman table type nNumberOfHuffmanCodeOfLength[16] : 0-16, number of Huffman codes of each possible length nHuffmanTable[256] : 0-255, the size used for AC and DC HuffmanTable are 16 and 162
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