u_sink.h

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// Copyright 2019-2022, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
 * @file
 * @brief  @ref xrt_frame_sink converters and other helpers.
 * @author Jakob Bornecrantz <jakob@collabora.com>
 * @author Moshi Turner <moshiturner@protonmail.com>
 * @ingroup aux_util
 */
 
#pragma once
 
#include "os/os_threading.h"
#include "xrt/xrt_frame.h"
#include "xrt/xrt_tracking.h"
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define U_SINK_MAX_SPLIT_DOWNSTREAMS 5
 
/*!
 * @see u_sink_quirk_create
 */
struct u_sink_quirk_params
{
        //! Marks frames passing through as side-by-side stereo.
        bool stereo_sbs;
        /*!
         * Marks the frames passing through as side-by-side stereo, and fixes up the camera's data offset to be readable
         * as a standard side-by-side frame.
         */
        bool ps4_cam;
        //! Sets the stereo format to the correct one for the leap motion and fixes image width.
        bool leap_motion;
        //! Reinterprets a raw bayer image as a monochrome L8 image.
        bool bayer_as_l8;
};
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_format_converter(struct xrt_frame_context *xfctx,
                               enum xrt_format f,
                               struct xrt_frame_sink *downstream,
                               struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_to_r8g8b8_or_l8(struct xrt_frame_context *xfctx,
                              struct xrt_frame_sink *downstream,
                              struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_to_r8g8b8_bayer_or_l8(struct xrt_frame_context *xfctx,
                                    struct xrt_frame_sink *downstream,
                                    struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_to_rgb_yuv_yuyv_uyvy_or_l8(struct xrt_frame_context *xfctx,
                                         struct xrt_frame_sink *downstream,
                                         struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_to_yuv_yuyv_uyvy_or_l8(struct xrt_frame_context *xfctx,
                                     struct xrt_frame_sink *downstream,
                                     struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_to_yuv_or_yuyv(struct xrt_frame_context *xfctx,
                             struct xrt_frame_sink *downstream,
                             struct xrt_frame_sink **out_xfs);
 
void
u_sink_create_half_scale(struct xrt_frame_context *xfctx,
                         struct xrt_frame_sink *downstream,
                         struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_create_to_r8g8b8_r8g8b8a8_r8g8b8x8_or_l8(struct xrt_frame_context *xfctx,
                                                struct xrt_frame_sink *downstream,
                                                struct xrt_frame_sink **out_xfs);
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_deinterleaver_create(struct xrt_frame_context *xfctx,
                            struct xrt_frame_sink *downstream,
                            struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
bool
u_sink_queue_create(struct xrt_frame_context *xfctx,
                    uint64_t max_size,
                    struct xrt_frame_sink *downstream,
                    struct xrt_frame_sink **out_xfs);
 
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
bool
u_sink_simple_queue_create(struct xrt_frame_context *xfctx,
                           struct xrt_frame_sink *downstream,
                           struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 */
void
u_sink_quirk_create(struct xrt_frame_context *xfctx,
                    struct xrt_frame_sink *downstream,
                    struct u_sink_quirk_params *params,
                    struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 * Takes a frame and pushes it to a maximum of U_SINK_MAX_SPLIT_DOWNSTREAMS sinks
 */
void
u_sink_split_multi_create(struct xrt_frame_context *xfctx,
                          struct xrt_frame_sink **downstreams,
                          size_t downstream_count,
                          struct xrt_frame_sink **out_xfs);
 
/*!
 * @public @memberof xrt_frame_sink
 * @see xrt_frame_context
 * Takes a frame and pushes it to two sinks
 */
void
u_sink_split_create(struct xrt_frame_context *xfctx,
                    struct xrt_frame_sink *left,
                    struct xrt_frame_sink *right,
                    struct xrt_frame_sink **out_xfs);
 
/*!
 * Splits Stereo SBS frames into two independent frames
 */
void
u_sink_stereo_sbs_split_create(struct xrt_frame_context *xfctx,
                               struct xrt_frame_sink *downstream_left,
                               struct xrt_frame_sink *downstream_right,
                               struct xrt_frame_sink **out_xfs);
 
/*!
 * Combines stereo frames.
 * Opposite of u_sink_stereo_sbs_split_create
 */
bool
u_sink_combiner_create(struct xrt_frame_context *xfctx,
                       struct xrt_frame_sink *downstream,
                       struct xrt_frame_sink **out_left_xfs,
                       struct xrt_frame_sink **out_right_xfs);
 
/*!
 * Enforces left-right push order on frames and forces them to be within a reasonable amount of time from each other
 */
bool
u_sink_force_genlock_create(struct xrt_frame_context *xfctx,
                            struct xrt_frame_sink *downstream_left,
                            struct xrt_frame_sink *downstream_right,
                            struct xrt_frame_sink **out_left_xfs,
                            struct xrt_frame_sink **out_right_xfs);
 
 
/*
 *
 * Debugging sink,
 *
 */
 
/*!
 * Allows more safely to debug sink inputs and outputs.
 */
struct u_sink_debug
{
        //! Is initialised/destroyed when added or root is removed.
        struct os_mutex mutex;
 
        // Protected by mutex, mutex must be held when frame is being pushed.
        struct xrt_frame_sink *sink;
};
 
static inline void
u_sink_debug_init(struct u_sink_debug *usd)
{
        os_mutex_init(&usd->mutex);
}
 
static inline bool
u_sink_debug_is_active(struct u_sink_debug *usd)
{
        os_mutex_lock(&usd->mutex);
        bool active = usd->sink != NULL;
        os_mutex_unlock(&usd->mutex);
 
        return active;
}
 
static inline void
u_sink_debug_push_frame(struct u_sink_debug *usd, struct xrt_frame *xf)
{
        os_mutex_lock(&usd->mutex);
        if (usd->sink != NULL) {
                xrt_sink_push_frame(usd->sink, xf);
        }
        os_mutex_unlock(&usd->mutex);
}
 
static inline void
u_sink_debug_set_sink(struct u_sink_debug *usd, struct xrt_frame_sink *xfs)
{
        os_mutex_lock(&usd->mutex);
        usd->sink = xfs;
        os_mutex_unlock(&usd->mutex);
}
 
static inline void
u_sink_debug_destroy(struct u_sink_debug *usd)
{
        os_mutex_destroy(&usd->mutex);
}
 
 
/*!
 * @public @memberof xrt_imu_sink
 * @see xrt_frame_context
 * Takes an IMU sample and pushes it to two sinks
 */
void
u_imu_sink_split_create(struct xrt_frame_context *xfctx,
                        struct xrt_imu_sink *downstream_one,
                        struct xrt_imu_sink *downstream_two,
                        struct xrt_imu_sink **out_imu_sink);
 
 
/*!
 * @public @memberof xrt_imu_sink
 * @see xrt_frame_context
 * Takes an IMU sample and only pushes it if its timestamp has monotonically increased.
 * Useful for handling hardware inconsistencies.
 */
void
u_imu_sink_force_monotonic_create(struct xrt_frame_context *xfctx,
                                  struct xrt_imu_sink *downstream,
                                  struct xrt_imu_sink **out_imu_sink);
 
 
#ifdef __cplusplus
}
#endif