1 #ifndef ANDROID_DVR_SENSOR_CONSTANTS_H_
2 #define ANDROID_DVR_SENSOR_CONSTANTS_H_
3 
4 namespace android {
5 namespace dvr {
6 
7 // Number of elements in the async pose buffer.
8 // Must be power of two.
9 // Macro so that shader code can easily include this value.
10 #define kPoseAsyncBufferTotalCount 8
11 
12 // Mask for accessing the current ring buffer array element:
13 // index = vsync_count & kPoseAsyncBufferIndexMask
14 constexpr uint32_t kPoseAsyncBufferIndexMask = kPoseAsyncBufferTotalCount - 1;
15 
16 // Number of pose frames including the current frame that are kept updated with
17 // pose forecast data. The other poses are left their last known estimates.
18 constexpr uint32_t kPoseAsyncBufferMinFutureCount = 4;
19 
20 }  // namespace dvr
21 }  // namespace android
22 
23 #endif  // ANDROID_DVR_SENSOR_CONSTANTS_H_
24