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114 lines
4.8 KiB
C
114 lines
4.8 KiB
C
/* Simple Plugin API */
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/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
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/* SPDX-License-Identifier: MIT */
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#ifndef SPA_VIDEO_MULTIVIEW_H
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#define SPA_VIDEO_MULTIVIEW_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* \addtogroup spa_param
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* \{
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*/
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/**
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* All possible stereoscopic 3D and multiview representations.
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* In conjunction with \ref spa_video_multiview_flags, describes how
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* multiview content is being transported in the stream.
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*/
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enum spa_video_multiview_mode {
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/** A special value indicating no multiview information. Used in spa_video_info and other
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* places to indicate that no specific multiview handling has been requested or provided.
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* This value is never carried on caps. */
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SPA_VIDEO_MULTIVIEW_MODE_NONE = -1,
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SPA_VIDEO_MULTIVIEW_MODE_MONO = 0, /**< All frames are monoscopic */
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/* Single view modes */
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SPA_VIDEO_MULTIVIEW_MODE_LEFT, /**< All frames represent a left-eye view */
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SPA_VIDEO_MULTIVIEW_MODE_RIGHT, /**< All frames represent a right-eye view */
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/* Stereo view modes */
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SPA_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE, /**< Left and right eye views are provided
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* in the left and right half of the frame
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* respectively. */
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SPA_VIDEO_MULTIVIEW_MODE_SIDE_BY_SIDE_QUINCUNX, /**< Left and right eye views are provided
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* in the left and right half of the
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* frame, but have been sampled using
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* quincunx method, with half-pixel offset
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* between the 2 views. */
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SPA_VIDEO_MULTIVIEW_MODE_COLUMN_INTERLEAVED, /**< Alternating vertical columns of pixels
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* represent the left and right eye view
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* respectively. */
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SPA_VIDEO_MULTIVIEW_MODE_ROW_INTERLEAVED, /**< Alternating horizontal rows of pixels
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* represent the left and right eye view
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* respectively. */
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SPA_VIDEO_MULTIVIEW_MODE_TOP_BOTTOM, /**< The top half of the frame contains the
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* left eye, and the bottom half the right
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* eye. */
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SPA_VIDEO_MULTIVIEW_MODE_CHECKERBOARD, /**< Pixels are arranged with alternating
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* pixels representing left and right eye
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* views in a checkerboard fashion. */
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/* Padding for new frame packing modes */
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SPA_VIDEO_MULTIVIEW_MODE_FRAME_BY_FRAME = 32, /**< Left and right eye views are provided
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* in separate frames alternately. */
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/* Multiview mode(s) */
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SPA_VIDEO_MULTIVIEW_MODE_MULTIVIEW_FRAME_BY_FRAME, /**< Multipleindependent views are
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* provided in separate frames in
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* sequence. This method only applies to
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* raw video buffers at the moment.
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* Specific view identification is via
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* \ref spa_video_multiview_meta on raw
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* video buffers. */
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SPA_VIDEO_MULTIVIEW_MODE_SEPARATED, /**< Multiple views are provided as separate
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* \ref spa_data framebuffers attached
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* to each \ref spa_buffer, described
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* by the \ref spa_video_multiview_meta */
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/* future expansion for annotated modes */
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};
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/**
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* spa_video_multiview_flags are used to indicate extra properties of a
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* stereo/multiview stream beyond the frame layout and buffer mapping
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* that is conveyed in the \ref spa_video_multiview_mode.
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*/
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enum spa_video_multiview_flags {
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SPA_VIDEO_MULTIVIEW_FLAGS_NONE = 0, /**< No flags */
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SPA_VIDEO_MULTIVIEW_FLAGS_RIGHT_VIEW_FIRST = (1 << 0), /**< For stereo streams, the normal arrangement
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* of left and right views is reversed */
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SPA_VIDEO_MULTIVIEW_FLAGS_LEFT_FLIPPED = (1 << 1), /**< The left view is vertically mirrored */
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SPA_VIDEO_MULTIVIEW_FLAGS_LEFT_FLOPPED = (1 << 2), /**< The left view is horizontally mirrored */
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SPA_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLIPPED = (1 << 3), /**< The right view is vertically mirrored */
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SPA_VIDEO_MULTIVIEW_FLAGS_RIGHT_FLOPPED = (1 << 4), /**< The right view is horizontally mirrored */
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SPA_VIDEO_MULTIVIEW_FLAGS_HALF_ASPECT = (1 << 14), /**< For frame-packed multiview
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* modes, indicates that the individual
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* views have been encoded with half the true
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* width or height and should be scaled back
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* up for display. This flag is used for
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* overriding input layout interpretation
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* by adjusting pixel-aspect-ratio.
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* For side-by-side, column interleaved or
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* checkerboard packings, the
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* pixel width will be doubled.
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* For row interleaved and
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* top-bottom encodings, pixel height will
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* be doubled */
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SPA_VIDEO_MULTIVIEW_FLAGS_MIXED_MONO = (1 << 15), /**< The video stream contains both
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* mono and multiview portions,
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* signalled on each buffer by the
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* absence or presence of the
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* \ref SPA_VIDEO_BUFFER_FLAG_MULTIPLE_VIEW
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* buffer flag. */
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};
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/**
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* \}
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*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* SPA_VIDEO_MULTIVIEW_H */
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