35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
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#ifndef ANDROID_DVR_CONFIG_H
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#define ANDROID_DVR_CONFIG_H
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// This header is shared by VrCore and Android and must be kept in sync.
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#include <stdint.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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// This is a shared memory buffer for passing config data from VrCore to
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// libvrflinger in SurfaceFlinger.
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struct __attribute__((packed, aligned(16))) DvrConfig {
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// Offset before vsync to submit frames to hardware composer.
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int32_t frame_post_offset_ns{4000000};
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// If the number of pending fences goes over this count at the point when we
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// are about to submit a new frame to HWC, we will drop the frame. This
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// should be a signal that the display driver has begun queuing frames. Note
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// that with smart displays (with RAM), the fence is signaled earlier than
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// the next vsync, at the point when the DMA to the display completes.
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// Currently we use a smart display and the EDS timing coincides with zero
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// pending fences, so this is 0.
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int32_t allowed_pending_fence_count{0};
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// New fields should always be added to the end for backwards compat.
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// Reserved padding to 16 bytes.
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uint8_t pad[8];
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};
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__END_DECLS
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#endif // ANDROID_DVR_CONFIG_H
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