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19 #ifndef AVUTIL_HWCONTEXT_DRM_H
20 #define AVUTIL_HWCONTEXT_DRM_H
27 * API-specific header for AV_HWDEVICE_TYPE_DRM.
29 * Internal frame allocation is not currently supported - all frames
30 * must be allocated by the user. Thus AVHWFramesContext is always
31 * NULL, though this may change if support for frame allocation is
37 * The maximum number of layers/planes in a DRM frame.
43 * DRM object descriptor.
45 * Describes a single DRM object, addressing it as a PRIME file
48 typedef struct AVDRMObjectDescriptor {
50 * DRM PRIME fd for the object.
54 * Total size of the object.
56 * (This includes any parts not which do not contain image data.)
60 * Format modifier applied to the object (DRM_FORMAT_MOD_*).
62 uint64_t format_modifier;
63 } AVDRMObjectDescriptor;
66 * DRM plane descriptor.
68 * Describes a single plane of a layer, which is contained within
71 typedef struct AVDRMPlaneDescriptor {
73 * Index of the object containing this plane in the objects
74 * array of the enclosing frame descriptor.
78 * Offset within that object of this plane.
82 * Pitch (linesize) of this plane.
85 } AVDRMPlaneDescriptor;
88 * DRM layer descriptor.
90 * Describes a single layer within a frame. This has the structure
91 * defined by its format, and will contain one or more planes.
93 typedef struct AVDRMLayerDescriptor {
95 * Format of the layer (DRM_FORMAT_*).
99 * Number of planes in the layer.
101 * This must match the number of planes required by format.
105 * Array of planes in this layer.
107 AVDRMPlaneDescriptor planes[AV_DRM_MAX_PLANES];
108 } AVDRMLayerDescriptor;
111 * DRM frame descriptor.
113 * This is used as the data pointer for AV_PIX_FMT_DRM_PRIME frames.
114 * It is also used by user-allocated frame pools - allocating in
115 * AVHWFramesContext.pool must return AVBufferRefs which contain
116 * an object of this type.
118 * The fields of this structure should be set such it can be
119 * imported directly by EGL using the EGL_EXT_image_dma_buf_import
120 * and EGL_EXT_image_dma_buf_import_modifiers extensions.
121 * (Note that the exact layout of a particular format may vary between
122 * platforms - we only specify that the same platform should be able
125 * The total number of planes must not exceed AV_DRM_MAX_PLANES, and
126 * the order of the planes by increasing layer index followed by
127 * increasing plane index must be the same as the order which would
128 * be used for the data pointers in the equivalent software format.
130 typedef struct AVDRMFrameDescriptor {
132 * Number of DRM objects making up this frame.
136 * Array of objects making up the frame.
138 AVDRMObjectDescriptor objects[AV_DRM_MAX_PLANES];
140 * Number of layers in the frame.
144 * Array of layers in the frame.
146 AVDRMLayerDescriptor layers[AV_DRM_MAX_PLANES];
147 } AVDRMFrameDescriptor;
152 * Allocated as AVHWDeviceContext.hwctx.
154 typedef struct AVDRMDeviceContext {
156 * File descriptor of DRM device.
158 * This is used as the device to create frames on, and may also be
159 * used in some derivation and mapping operations.
161 * If no device is required, set to -1.
164 } AVDRMDeviceContext;
166 #endif /* AVUTIL_HWCONTEXT_DRM_H */