Struct Frame

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pub struct Frame { /* private fields */ }

Expand description

A VP9 frame.

Implementations§

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impl Frame

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pub fn compressed_header_data(&self) -> &[u8] ⓘ

Returns a slice into the data of the compressed header.

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pub fn compressed_header_and_tile_data(&self) -> &[u8] ⓘ

Returns a slice into the data of the compressed header and tile data.

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pub fn tile_data(&self) -> &[u8] ⓘ

Returns a slice into the data of the tile data.

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pub fn profile(&self) -> Profile

The profile the frame is using.

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pub fn show_existing_frame(&self) -> bool

Indicates that the frame indexed by frame_to_show_map_idx is to be displayed. The frame contains no actual frame data.

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pub fn frame_to_show_map_idx(&self) -> Option<u8>

Specifies the frame to be displayed. It is only available if show_existing_frame is true.

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pub fn last_frame_type(&self) -> FrameType

The frame type of the previous frame.

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pub fn frame_type(&self) -> FrameType

The frame type of this frame.

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pub fn show_frame(&self) -> bool

Indicates that the frame is to be displayed.

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pub fn error_resilient_mode(&self) -> bool

Indicates that error resilient mode is enabled.

Error resilient mode allows the syntax of a frame to be decoded independently of previous frames.

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pub fn intra_only(&self) -> bool

Indicates that a frame is an intra-only frame.

A key frame is different to an intra-only frame even though both only use intra prediction. The difference is that a key frame fully resets the decoding process.

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pub fn reset_frame_context(&self) -> ResetFrameContext

Specifies whether the frame context should be reset to default values.

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pub fn ref_frame_indices(&self) -> &[u8; 3]

The indices of the used reference frames.

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pub fn last_ref_frame_index(&self) -> u8

Last reference frame index.

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pub fn golden_ref_frame_index(&self) -> u8

Golden reference frame index.

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pub fn alt_ref_frame_index(&self) -> u8

Alternate reference frame index.

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pub fn ref_frame_sign_bias(&self) -> &[bool; 4]

Specifies the intended direction of the motion vector in time for each reference frame.

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pub fn allow_high_precision_mv(&self) -> bool

Specifies the precision of the motion vectors.

False = quarter precision, True = eighth precision.

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pub fn refresh_frame_context(&self) -> bool

Specifies that the probabilities computed for this frame should be stored for reference by future frames.

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pub fn refresh_frame_flags(&self) -> u8

Contains a bitmask that specifies which reference frame slots will be updated with the current frame after it is decoded.

First bit = first frame (1). Last bit = last frame (8).

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pub fn frame_parallel_decoding_mode(&self) -> bool

Specifies if parallel decoding mode is activated.

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pub fn frame_context_idx(&self) -> u8

Specifies which frame context to use.

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pub fn uncompressed_header_size(&self) -> usize

The size of the uncompressed header.

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pub fn compressed_header_size(&self) -> usize

The size of the uncompressed header.

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pub fn tile_size(&self) -> usize

The size of the tile data.

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pub fn color_depth(&self) -> ColorDepth

The color depth of the frame.

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pub fn color_space(&self) -> ColorSpace

The color space of the frame.

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pub fn color_range(&self) -> ColorRange

The color range of the frame.

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pub fn subsampling(&self) -> Subsampling

The subsampling the frame is using.

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pub fn subsampling_x(&self) -> bool

Indicates if sub sampling is used along the x axis.

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pub fn subsampling_y(&self) -> bool

Indicates if sub sampling is used along the y axis.

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pub fn width(&self) -> u16

The width of the frame.

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pub fn height(&self) -> u16

The height of the frame.

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pub fn render_width(&self) -> u16

A hint for the application for the desired width to render.

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pub fn render_height(&self) -> u16

A hint for the application for the desired height to render.

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pub fn mi_cols(&self) -> u16

A variable holding the vertical location of the block in units of 8x8 pixels.

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pub fn mi_rows(&self) -> u16

A variable holding the horizontal location of the block in units of 8x8 pixels.

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pub fn tile_rows_log2(&self) -> u8

The base 2 logarithm of the height of each tile (where the height is measured in units of 8x8 blocks)

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pub fn tile_cols_log2(&self) -> u8

The base 2 logarithm of the width of each tile (where the width is measured in units of 8x8 blocks)

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pub fn interpolation_filter(&self) -> InterpolationFilter

The type of filter used in inter prediction.

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pub fn loop_filter_level(&self) -> u8

The loop filter strength.

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pub fn loop_filter_sharpness(&self) -> u8

The loop filter sharpness.

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pub fn loop_filter_delta_enabled(&self) -> bool

Indicates that the filter level depends on the mode and reference frame used to predict a block.

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pub fn update_ref_delta(&self) -> bool

Indicates that the the bitstream contains the syntax element loop_filter_ref_delta.

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pub fn loop_filter_ref_deltas(&self) -> &[i8; 4]

Contains the adjustment needed for the filter level based on the chosen reference frame.

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pub fn update_mode_delta(&self) -> bool

Indicates that the the bitstream contains the syntax element loop_filter_mode_deltas.

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pub fn loop_filter_mode_deltas(&self) -> &[i8; 2]

Contains the adjustment needed for the filter level based on the chosen mode.

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pub fn base_q_idx(&self) -> i32

The base frame qindex. This is used for Y AC coefficients and as the base value for the other quantizers.

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pub fn delta_q_y_dc(&self) -> i32

The Y DC quantizer relative to base_q_idx.

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pub fn delta_q_uv_dc(&self) -> i32

The UV DC quantizer relative to base_q_idx.

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pub fn delta_q_uv_ac(&self) -> i32

The UV AC quantizer relative to base_q_idx.

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pub fn lossless(&self) -> bool

Indicates that the frame is coded using a special 4x4 transform designed for encoding frames that are bit-identical with the original frames.

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pub fn segmentation_enabled(&self) -> bool

Specifies that this frame makes use of the segmentation tool.

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pub fn segmentation_update_map(&self) -> bool

Specifies that the segmentation map should be updated during the decoding of this frame.

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pub fn segment_tree_probs(&self) -> &[u8; 7]

The probability values to be used when decoding segment_id.

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pub fn segment_pred_probs(&self) -> &[u8; 3]

The probability values to be used when decoding seg_id_predicted.

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pub fn segmentation_temporal_update(&self) -> bool

Indicates that the updates to the segmentation map are coded relative to the existing segmentation map.

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pub fn segmentation_update_data(&self) -> bool

Indicates that new parameters are about to be specified for each segment.

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pub fn segmentation_abs_or_delta_update(&self) -> bool

Indicates that the segmentation parameters represent the actual values to be used, otherwise the segmentation parameters represent adjustments relative to the standard values.

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