Merge "Re-organize dvr_tracking headers"

#include <dvr/dvr_display_manager.h>

#include <dvr/dvr_performance.h>

#include <dvr/dvr_surface.h>

#include <dvr/dvr_tracking.h>

#include <dvr/dvr_vsync.h>

// Headers not yet moved into libdvr.

#include <dvr/dvr_display_types.h>

#include <dvr/dvr_hardware_composer_types.h>

#include <dvr/dvr_pose.h>

#include <dvr/dvr_tracking.h>

#include <dvr/dvr_tracking_types.h>

#ifdef __cplusplus

extern "C" {

typedef struct DvrSurfaceAttributeValue DvrSurfaceAttributeValue;

typedef struct DvrSurfaceAttribute DvrSurfaceAttribute;

typedef struct DvrReadBuffer DvrReadBuffer;

typedef struct DvrTrackingCamera DvrTrackingCamera;

typedef struct DvrTrackingFeatureExtractor DvrTrackingFeatureExtractor;

typedef struct DvrTrackingSensors DvrTrackingSensors;

typedef struct DvrWriteBufferQueue DvrWriteBufferQueue;

// Note: To avoid breaking others during active development, only modify this

// struct by appending elements to the end.

// If you do feel we should to re-arrange or remove elements, please make a

    DvrTrackingFeatureExtractor** out_extractor);

typedef void (*DvrTrackingFeatureExtractorDestroyPtr)(

    DvrTrackingFeatureExtractor* extractor);

typedef void (*DvrTrackingFeatureCallback)(void* context,

                                           const DvrTrackingFeatures* event);

typedef int (*DvrTrackingFeatureExtractorStartPtr)(

    DvrTrackingFeatureExtractor* extractor,

    DvrTrackingFeatureCallback callback, void* context);

    DvrTrackingFeatureExtractor* extractor, DvrReadBuffer* buffer,

    const DvrTrackingBufferMetadata* metadata, bool* out_skipped);

typedef void (*DvrTrackingSensorEventCallback)(void* context,

                                               DvrTrackingSensorEvent* event);

typedef int (*DvrTrackingSensorsCreatePtr)(DvrTrackingSensors** out_sensors,

                                           const char* mode);

typedef void (*DvrTrackingSensorsDestroyPtr)(DvrTrackingSensors* sensors);