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tornavis/source/blender/blenkernel/intern/tracking_util.cc

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/* SPDX-FileCopyrightText: 2011 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup bke
*
* This file contains implementation of function which are used
* by multiple tracking files but which should not be public.
*/
#include <cstddef>
#include "MEM_guardedalloc.h"
#include "DNA_movieclip_types.h"
#include "BLI_ghash.h"
#include "BLI_listbase.h"
#include "BLI_math_color.h"
#include "BLI_math_vector.h"
#include "BLI_string.h"
#include "BLI_string_utils.hh"
#include "BLI_threads.h"
#include "BLI_utildefines.h"
#include "BLT_translation.h"
#include "BKE_movieclip.h"
#include "BKE_tracking.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_moviecache.h"
#include "tracking_private.h"
#include "libmv-capi.h"
/* Uncomment this to have caching-specific debug prints. */
// #define DEBUG_CACHE
#ifdef DEBUG_CACHE
# define CACHE_PRINTF(...) printf(__VA_ARGS__)
#else
# define CACHE_PRINTF(...)
#endif
/* -------------------------------------------------------------------- */
/** \name Tracks Map
* \{ */
TracksMap *tracks_map_new(const char *object_name, int num_tracks)
{
TracksMap *map = MEM_cnew<TracksMap>("TrackingsMap");
STRNCPY(map->object_name, object_name);
map->num_tracks = num_tracks;
map->tracks = MEM_cnew_array<MovieTrackingTrack>(num_tracks, "TrackingsMap tracks");
map->hash = BLI_ghash_ptr_new("TracksMap hash");
BLI_spin_init(&map->spin_lock);
return map;
}
int tracks_map_get_size(TracksMap *map)
{
return map->num_tracks;
}
void tracks_map_insert(TracksMap *map, MovieTrackingTrack *track)
{
MovieTrackingTrack new_track = *track;
new_track.markers = static_cast<MovieTrackingMarker *>(MEM_dupallocN(new_track.markers));
map->tracks[map->ptr] = new_track;
BLI_ghash_insert(map->hash, &map->tracks[map->ptr], track);
map->ptr++;
}
void tracks_map_merge(TracksMap *map, MovieTracking *tracking)
{
MovieTrackingTrack *track;
ListBase tracks = {nullptr, nullptr}, new_tracks = {nullptr, nullptr};
ListBase *old_tracks;
MovieTrackingObject *tracking_object = BKE_tracking_object_get_named(tracking, map->object_name);
if (!tracking_object) {
/* object was deleted by user, create new one */
tracking_object = BKE_tracking_object_add(tracking, map->object_name);
}
old_tracks = &tracking_object->tracks;
/* duplicate currently operating tracks to temporary list.
* this is needed to keep names in unique state and it's faster to change names
* of currently operating tracks (if needed)
*/
for (int a = 0; a < map->num_tracks; a++) {
MovieTrackingTrack *old_track;
bool mapped_to_old = false;
track = &map->tracks[a];
/* find original of operating track in list of previously displayed tracks */
old_track = static_cast<MovieTrackingTrack *>(BLI_ghash_lookup(map->hash, track));
if (old_track) {
if (BLI_findindex(old_tracks, old_track) != -1) {
BLI_remlink(old_tracks, old_track);
BLI_spin_lock(&map->spin_lock);
/* Copy flags like selection back to the track map. */
track->flag = old_track->flag;
track->pat_flag = old_track->pat_flag;
track->search_flag = old_track->search_flag;
/* Copy all the rest settings back from the map to the actual tracks. */
MEM_freeN(old_track->markers);
*old_track = *track;
old_track->markers = static_cast<MovieTrackingMarker *>(MEM_dupallocN(old_track->markers));
BLI_spin_unlock(&map->spin_lock);
BLI_addtail(&tracks, old_track);
mapped_to_old = true;
}
}
if (mapped_to_old == false) {
MovieTrackingTrack *new_track = BKE_tracking_track_duplicate(track);
/* Update old-new track mapping */
BLI_ghash_reinsert(map->hash, track, new_track, nullptr, nullptr);
BLI_addtail(&tracks, new_track);
}
}
/* move all tracks, which aren't operating */
track = static_cast<MovieTrackingTrack *>(old_tracks->first);
while (track) {
MovieTrackingTrack *next = track->next;
BLI_addtail(&new_tracks, track);
track = next;
}
/* now move all tracks which are currently operating and keep their names unique */
track = static_cast<MovieTrackingTrack *>(tracks.first);
while (track) {
MovieTrackingTrack *next = track->next;
BLI_remlink(&tracks, track);
track->next = track->prev = nullptr;
BLI_addtail(&new_tracks, track);
BLI_uniquename(&new_tracks,
track,
CTX_DATA_(BLT_I18NCONTEXT_ID_MOVIECLIP, "Track"),
'.',
offsetof(MovieTrackingTrack, name),
sizeof(track->name));
track = next;
}
*old_tracks = new_tracks;
}
void tracks_map_free(TracksMap *map)
{
BLI_ghash_free(map->hash, nullptr, nullptr);
for (int i = 0; i < map->num_tracks; i++) {
BKE_tracking_track_free(&map->tracks[i]);
}
MEM_freeN(map->tracks);
BLI_spin_end(&map->spin_lock);
MEM_freeN(map);
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Space Transformation Functions
* \{ */
/* Three coordinate frames: Frame, Search, and Marker
* Two units: Pixels, Unified
* Notation: {coordinate frame}_{unit}; for example, "search_pixel" are search
* window relative coordinates in pixels, and "frame_unified" are unified 0..1
* coordinates relative to the entire frame.
*/
static void unified_to_pixel(int frame_width,
int frame_height,
const float unified_coords[2],
float pixel_coords[2])
{
pixel_coords[0] = unified_coords[0] * frame_width;
pixel_coords[1] = unified_coords[1] * frame_height;
}
static void marker_to_frame_unified(const MovieTrackingMarker *marker,
const float marker_unified_coords[2],
float frame_unified_coords[2])
{
frame_unified_coords[0] = marker_unified_coords[0] + marker->pos[0];
frame_unified_coords[1] = marker_unified_coords[1] + marker->pos[1];
}
static void marker_unified_to_frame_pixel_coordinates(int frame_width,
int frame_height,
const MovieTrackingMarker *marker,
const float marker_unified_coords[2],
float frame_pixel_coords[2])
{
marker_to_frame_unified(marker, marker_unified_coords, frame_pixel_coords);
unified_to_pixel(frame_width, frame_height, frame_pixel_coords, frame_pixel_coords);
}
void tracking_get_search_origin_frame_pixel(int frame_width,
int frame_height,
const MovieTrackingMarker *marker,
float frame_pixel[2])
{
/* Get the lower left coordinate of the search window and snap to pixel coordinates */
marker_unified_to_frame_pixel_coordinates(
frame_width, frame_height, marker, marker->search_min, frame_pixel);
frame_pixel[0] = int(frame_pixel[0]);
frame_pixel[1] = int(frame_pixel[1]);
}
static void pixel_to_unified(int frame_width,
int frame_height,
const float pixel_coords[2],
float unified_coords[2])
{
unified_coords[0] = pixel_coords[0] / frame_width;
unified_coords[1] = pixel_coords[1] / frame_height;
}
static void marker_unified_to_search_pixel(int frame_width,
int frame_height,
const MovieTrackingMarker *marker,
const float marker_unified[2],
float search_pixel[2])
{
float frame_pixel[2];
float search_origin_frame_pixel[2];
marker_unified_to_frame_pixel_coordinates(
frame_width, frame_height, marker, marker_unified, frame_pixel);
tracking_get_search_origin_frame_pixel(
frame_width, frame_height, marker, search_origin_frame_pixel);
sub_v2_v2v2(search_pixel, frame_pixel, search_origin_frame_pixel);
}
static void search_pixel_to_marker_unified(int frame_width,
int frame_height,
const MovieTrackingMarker *marker,
const float search_pixel[2],
float marker_unified[2])
{
float frame_unified[2];
float search_origin_frame_pixel[2];
tracking_get_search_origin_frame_pixel(
frame_width, frame_height, marker, search_origin_frame_pixel);
add_v2_v2v2(frame_unified, search_pixel, search_origin_frame_pixel);
pixel_to_unified(frame_width, frame_height, frame_unified, frame_unified);
/* marker pos is in frame unified */
sub_v2_v2v2(marker_unified, frame_unified, marker->pos);
}
void tracking_get_marker_coords_for_tracking(int frame_width,
int frame_height,
const MovieTrackingMarker *marker,
double search_pixel_x[5],
double search_pixel_y[5])
{
float unified_coords[2];
float pixel_coords[2];
/* Convert the corners into search space coordinates. */
for (int i = 0; i < 4; i++) {
marker_unified_to_search_pixel(
frame_width, frame_height, marker, marker->pattern_corners[i], pixel_coords);
search_pixel_x[i] = pixel_coords[0] - 0.5f;
search_pixel_y[i] = pixel_coords[1] - 0.5f;
}
/* Convert the center position (aka "pos"); this is the origin */
unified_coords[0] = 0.0f;
unified_coords[1] = 0.0f;
marker_unified_to_search_pixel(frame_width, frame_height, marker, unified_coords, pixel_coords);
search_pixel_x[4] = pixel_coords[0] - 0.5f;
search_pixel_y[4] = pixel_coords[1] - 0.5f;
}
void tracking_set_marker_coords_from_tracking(int frame_width,
int frame_height,
MovieTrackingMarker *marker,
const double search_pixel_x[5],
const double search_pixel_y[5])
{
float marker_unified[2];
float search_pixel[2];
/* Convert the corners into search space coordinates. */
for (int i = 0; i < 4; i++) {
search_pixel[0] = search_pixel_x[i] + 0.5;
search_pixel[1] = search_pixel_y[i] + 0.5;
search_pixel_to_marker_unified(
frame_width, frame_height, marker, search_pixel, marker->pattern_corners[i]);
}
/* Convert the center position (aka "pos"); this is the origin */
search_pixel[0] = search_pixel_x[4] + 0.5;
search_pixel[1] = search_pixel_y[4] + 0.5;
search_pixel_to_marker_unified(frame_width, frame_height, marker, search_pixel, marker_unified);
/* If the tracker tracked nothing, then "marker_unified" would be zero.
* Otherwise, the entire patch shifted, and that delta should be applied to
* all the coordinates.
*/
for (int i = 0; i < 4; i++) {
marker->pattern_corners[i][0] -= marker_unified[0];
marker->pattern_corners[i][1] -= marker_unified[1];
}
marker->pos[0] += marker_unified[0];
marker->pos[1] += marker_unified[1];
}
void tracking_principal_point_normalized_to_pixel(const float principal_point_normalized[2],
const int frame_width,
const int frame_height,
float r_principal_point_pixel[2])
{
const float frame_center_x = float(frame_width) / 2;
const float frame_center_y = float(frame_height) / 2;
r_principal_point_pixel[0] = frame_center_x + principal_point_normalized[0] * frame_center_x;
r_principal_point_pixel[1] = frame_center_y + principal_point_normalized[1] * frame_center_y;
}
void tracking_principal_point_pixel_to_normalized(const float principal_point_pixel[2],
const int frame_width,
const int frame_height,
float r_principal_point_normalized[2])
{
const float frame_center_x = float(frame_width) / 2;
const float frame_center_y = float(frame_height) / 2;
r_principal_point_normalized[0] = (principal_point_pixel[0] - frame_center_x) / frame_center_x;
r_principal_point_normalized[1] = (principal_point_pixel[1] - frame_center_y) / frame_center_y;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name General Purpose Utility Functions
* \{ */
void tracking_marker_insert_disabled(MovieTrackingTrack *track,
const MovieTrackingMarker *ref_marker,
bool before,
bool overwrite)
{
MovieTrackingMarker marker_new;
marker_new = *ref_marker;
marker_new.flag &= ~MARKER_TRACKED;
marker_new.flag |= MARKER_DISABLED;
if (before) {
marker_new.framenr--;
}
else {
marker_new.framenr++;
}
if (overwrite || !BKE_tracking_track_has_marker_at_frame(track, marker_new.framenr)) {
BKE_tracking_marker_insert(track, &marker_new);
}
}
static void distortion_model_parameters_from_tracking(
const MovieTrackingCamera *camera, libmv_CameraIntrinsicsOptions *camera_intrinsics_options)
{
switch (camera->distortion_model) {
case TRACKING_DISTORTION_MODEL_POLYNOMIAL:
camera_intrinsics_options->distortion_model = LIBMV_DISTORTION_MODEL_POLYNOMIAL;
camera_intrinsics_options->polynomial_k1 = camera->k1;
camera_intrinsics_options->polynomial_k2 = camera->k2;
camera_intrinsics_options->polynomial_k3 = camera->k3;
camera_intrinsics_options->polynomial_p1 = 0.0;
camera_intrinsics_options->polynomial_p2 = 0.0;
return;
case TRACKING_DISTORTION_MODEL_DIVISION:
camera_intrinsics_options->distortion_model = LIBMV_DISTORTION_MODEL_DIVISION;
camera_intrinsics_options->division_k1 = camera->division_k1;
camera_intrinsics_options->division_k2 = camera->division_k2;
return;
case TRACKING_DISTORTION_MODEL_NUKE:
camera_intrinsics_options->distortion_model = LIBMV_DISTORTION_MODEL_NUKE;
camera_intrinsics_options->nuke_k1 = camera->nuke_k1;
camera_intrinsics_options->nuke_k2 = camera->nuke_k2;
return;
case TRACKING_DISTORTION_MODEL_BROWN:
camera_intrinsics_options->distortion_model = LIBMV_DISTORTION_MODEL_BROWN;
camera_intrinsics_options->brown_k1 = camera->brown_k1;
camera_intrinsics_options->brown_k2 = camera->brown_k2;
camera_intrinsics_options->brown_k3 = camera->brown_k3;
camera_intrinsics_options->brown_k4 = camera->brown_k4;
camera_intrinsics_options->brown_p1 = camera->brown_p1;
camera_intrinsics_options->brown_p2 = camera->brown_p2;
return;
}
/* Unknown distortion model, which might be due to opening newer file in older Blender.
* Fallback to a known and supported model with 0 distortion. */
camera_intrinsics_options->distortion_model = LIBMV_DISTORTION_MODEL_POLYNOMIAL;
camera_intrinsics_options->polynomial_k1 = 0.0;
camera_intrinsics_options->polynomial_k2 = 0.0;
camera_intrinsics_options->polynomial_k3 = 0.0;
camera_intrinsics_options->polynomial_p1 = 0.0;
camera_intrinsics_options->polynomial_p2 = 0.0;
}
static void distortion_model_parameters_from_options(
const libmv_CameraIntrinsicsOptions *camera_intrinsics_options, MovieTrackingCamera *camera)
{
switch (camera_intrinsics_options->distortion_model) {
case LIBMV_DISTORTION_MODEL_POLYNOMIAL:
camera->distortion_model = TRACKING_DISTORTION_MODEL_POLYNOMIAL;
camera->k1 = camera_intrinsics_options->polynomial_k1;
camera->k2 = camera_intrinsics_options->polynomial_k2;
camera->k3 = camera_intrinsics_options->polynomial_k3;
return;
case LIBMV_DISTORTION_MODEL_DIVISION:
camera->distortion_model = TRACKING_DISTORTION_MODEL_DIVISION;
camera->division_k1 = camera_intrinsics_options->division_k1;
camera->division_k2 = camera_intrinsics_options->division_k2;
return;
case LIBMV_DISTORTION_MODEL_NUKE:
camera->distortion_model = TRACKING_DISTORTION_MODEL_NUKE;
camera->nuke_k1 = camera_intrinsics_options->nuke_k1;
camera->nuke_k2 = camera_intrinsics_options->nuke_k2;
return;
case LIBMV_DISTORTION_MODEL_BROWN:
camera->distortion_model = TRACKING_DISTORTION_MODEL_BROWN;
camera->brown_k1 = camera_intrinsics_options->brown_k1;
camera->brown_k2 = camera_intrinsics_options->brown_k2;
camera->brown_k3 = camera_intrinsics_options->brown_k3;
camera->brown_k4 = camera_intrinsics_options->brown_k4;
camera->brown_p1 = camera_intrinsics_options->brown_p1;
camera->brown_p2 = camera_intrinsics_options->brown_p2;
return;
}
/* Libmv returned distortion model which is not known to Blender. This is a logical error in code
* and Blender side is to be updated to match Libmv. */
BLI_assert_msg(0, "Unknown distortion model");
}
void tracking_cameraIntrinscisOptionsFromTracking(
MovieTracking *tracking,
const int calibration_width,
const int calibration_height,
libmv_CameraIntrinsicsOptions *camera_intrinsics_options)
{
MovieTrackingCamera *camera = &tracking->camera;
const float aspy = 1.0f / tracking->camera.pixel_aspect;
float principal_px[2];
tracking_principal_point_normalized_to_pixel(
camera->principal_point, calibration_width, calibration_height, principal_px);
camera_intrinsics_options->num_threads = BLI_system_thread_count();
camera_intrinsics_options->focal_length = camera->focal;
camera_intrinsics_options->principal_point_x = principal_px[0];
camera_intrinsics_options->principal_point_y = principal_px[1] * aspy;
distortion_model_parameters_from_tracking(camera, camera_intrinsics_options);
camera_intrinsics_options->image_width = calibration_width;
camera_intrinsics_options->image_height = int(calibration_height * aspy);
}
void tracking_trackingCameraFromIntrinscisOptions(
MovieTracking *tracking, const libmv_CameraIntrinsicsOptions *camera_intrinsics_options)
{
MovieTrackingCamera *camera = &tracking->camera;
camera->focal = camera_intrinsics_options->focal_length;
/* NOTE: The image size stored in the `camera_intrinsics_options` is aspect-ratio corrected,
* so there is no need to "un-apply" it from the principal point. */
const float principal_px[2] = {float(camera_intrinsics_options->principal_point_x),
float(camera_intrinsics_options->principal_point_y)};
tracking_principal_point_pixel_to_normalized(principal_px,
camera_intrinsics_options->image_width,
camera_intrinsics_options->image_height,
camera->principal_point);
distortion_model_parameters_from_options(camera_intrinsics_options, camera);
}
MovieTrackingMarker *tracking_get_keyframed_marker(MovieTrackingTrack *track,
int current_frame,
bool backwards)
{
MovieTrackingMarker *marker_keyed = nullptr;
MovieTrackingMarker *marker_keyed_fallback = nullptr;
int a = BKE_tracking_marker_get(track, current_frame) - track->markers;
while (a >= 0 && a < track->markersnr) {
int next = backwards ? a + 1 : a - 1;
bool is_keyframed = false;
MovieTrackingMarker *cur_marker = &track->markers[a];
MovieTrackingMarker *next_marker = nullptr;
if (next >= 0 && next < track->markersnr) {
next_marker = &track->markers[next];
}
if ((cur_marker->flag & MARKER_DISABLED) == 0) {
/* If it'll happen so we didn't find a real keyframe marker,
* fallback to the first marker in current tracked segment
* as a keyframe.
*/
if (next_marker == nullptr) {
/* Could happen when trying to get reference marker for the fist
* one on the segment which isn't surrounded by disabled markers.
*
* There's no really good choice here, just use the reference
* marker which looks correct..
*/
if (marker_keyed_fallback == nullptr) {
marker_keyed_fallback = cur_marker;
}
}
else if (next_marker->flag & MARKER_DISABLED) {
if (marker_keyed_fallback == nullptr) {
marker_keyed_fallback = cur_marker;
}
}
is_keyframed |= (cur_marker->flag & MARKER_TRACKED) == 0;
}
if (is_keyframed) {
marker_keyed = cur_marker;
break;
}
a = next;
}
if (marker_keyed == nullptr) {
marker_keyed = marker_keyed_fallback;
}
return marker_keyed;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Frame Accessor
* \{ */
static ImBuf *accessor_get_preprocessed_ibuf(TrackingImageAccessor *accessor,
int clip_index,
int frame)
{
MovieClip *clip;
MovieClipUser user;
ImBuf *ibuf;
int scene_frame;
BLI_assert(clip_index < accessor->num_clips);
clip = accessor->clips[clip_index];
scene_frame = BKE_movieclip_remap_clip_to_scene_frame(clip, frame);
BKE_movieclip_user_set_frame(&user, scene_frame);
user.render_size = MCLIP_PROXY_RENDER_SIZE_FULL;
user.render_flag = 0;
ibuf = BKE_movieclip_get_ibuf(clip, &user);
return ibuf;
}
static ImBuf *make_grayscale_ibuf_copy(ImBuf *ibuf)
{
ImBuf *grayscale = IMB_allocImBuf(ibuf->x, ibuf->y, 32, 0);
BLI_assert(ELEM(ibuf->channels, 3, 4));
/* TODO(sergey): Bummer, currently IMB API only allows to create 4 channels
* float buffer, so we do it manually here.
*
* Will generalize it later.
*/
const size_t num_pixels = size_t(grayscale->x) * size_t(grayscale->y);
grayscale->channels = 1;
float *rect_float = MEM_cnew_array<float>(num_pixels, "tracking grayscale image");
if (rect_float != nullptr) {
IMB_assign_float_buffer(grayscale, rect_float, IB_TAKE_OWNERSHIP);
for (int i = 0; i < grayscale->x * grayscale->y; i++) {
const float *pixel = ibuf->float_buffer.data + ibuf->channels * i;
rect_float[i] = 0.2126f * pixel[0] + 0.7152f * pixel[1] + 0.0722f * pixel[2];
}
}
return grayscale;
}
static void ibuf_to_float_image(const ImBuf *ibuf, libmv_FloatImage *float_image)
{
BLI_assert(ibuf->float_buffer.data != nullptr);
float_image->buffer = ibuf->float_buffer.data;
float_image->width = ibuf->x;
float_image->height = ibuf->y;
float_image->channels = ibuf->channels;
}
static ImBuf *float_image_to_ibuf(libmv_FloatImage *float_image)
{
ImBuf *ibuf = IMB_allocImBuf(float_image->width, float_image->height, 32, 0);
size_t num_total_channels = size_t(ibuf->x) * size_t(ibuf->y) * float_image->channels;
ibuf->channels = float_image->channels;
float *rect_float = MEM_cnew_array<float>(num_total_channels, "tracking grayscale image");
if (rect_float != nullptr) {
IMB_assign_float_buffer(ibuf, rect_float, IB_TAKE_OWNERSHIP);
memcpy(rect_float, float_image->buffer, num_total_channels * sizeof(float));
}
return ibuf;
}
static ImBuf *accessor_get_ibuf(TrackingImageAccessor *accessor,
int clip_index,
int frame,
libmv_InputMode input_mode,
int downscale,
const libmv_Region *region,
const libmv_FrameTransform *transform)
{
/* First try to get fully processed image from the cache. */
CACHE_PRINTF("Calculate new buffer for frame %d\n", frame);
/* And now we do post-processing of the original frame. */
ImBuf *orig_ibuf = accessor_get_preprocessed_ibuf(accessor, clip_index, frame);
if (orig_ibuf == nullptr) {
return nullptr;
}
ImBuf *final_ibuf;
/* Cut a region if requested. */
if (region != nullptr) {
int width = region->max[0] - region->min[0], height = region->max[1] - region->min[1];
/* If the requested region goes outside of the actual frame we still
* return the requested region size, but only fill it's partially with
* the data we can.
*/
int clamped_origin_x = max_ii(int(region->min[0]), 0),
clamped_origin_y = max_ii(int(region->min[1]), 0);
int dst_offset_x = clamped_origin_x - int(region->min[0]),
dst_offset_y = clamped_origin_y - int(region->min[1]);
int clamped_width = width - dst_offset_x, clamped_height = height - dst_offset_y;
clamped_width = min_ii(clamped_width, orig_ibuf->x - clamped_origin_x);
clamped_height = min_ii(clamped_height, orig_ibuf->y - clamped_origin_y);
final_ibuf = IMB_allocImBuf(width, height, 32, IB_rectfloat);
if (orig_ibuf->float_buffer.data != nullptr) {
IMB_rectcpy(final_ibuf,
orig_ibuf,
dst_offset_x,
dst_offset_y,
clamped_origin_x,
clamped_origin_y,
clamped_width,
clamped_height);
}
else {
/* TODO(sergey): We don't do any color space or alpha conversion
* here. Probably Libmv is better to work in the linear space,
* but keep sRGB space here for compatibility for now.
*/
for (int y = 0; y < clamped_height; y++) {
for (int x = 0; x < clamped_width; x++) {
int src_x = x + clamped_origin_x, src_y = y + clamped_origin_y;
int dst_x = x + dst_offset_x, dst_y = y + dst_offset_y;
int dst_index = (dst_y * width + dst_x) * 4,
src_index = (src_y * orig_ibuf->x + src_x) * 4;
rgba_uchar_to_float(final_ibuf->float_buffer.data + dst_index,
orig_ibuf->byte_buffer.data + src_index);
}
}
}
}
else {
/* Libmv only works with float images,
*
* This would likely make it so loads of float buffers are being stored
* in the cache which is nice on the one hand (faster re-use of the
* frames) but on the other hand it bumps the memory usage up.
*/
BLI_thread_lock(LOCK_MOVIECLIP);
IMB_float_from_rect(orig_ibuf);
BLI_thread_unlock(LOCK_MOVIECLIP);
final_ibuf = orig_ibuf;
}
/* Downscale if needed. */
if (downscale > 0) {
if (final_ibuf == orig_ibuf) {
final_ibuf = IMB_dupImBuf(orig_ibuf);
}
IMB_scaleImBuf(final_ibuf, orig_ibuf->x / (1 << downscale), orig_ibuf->y / (1 << downscale));
}
/* Apply possible transformation. */
if (transform != nullptr) {
libmv_FloatImage input_image, output_image;
ibuf_to_float_image(final_ibuf, &input_image);
libmv_frameAccessorgetTransformRun(transform, &input_image, &output_image);
if (final_ibuf != orig_ibuf) {
IMB_freeImBuf(final_ibuf);
}
final_ibuf = float_image_to_ibuf(&output_image);
libmv_floatImageDestroy(&output_image);
}
/* Transform number of channels. */
if (input_mode == LIBMV_IMAGE_MODE_RGBA) {
BLI_assert(ELEM(orig_ibuf->channels, 3, 4));
/* pass */
}
else /* if (input_mode == LIBMV_IMAGE_MODE_MONO) */ {
BLI_assert(input_mode == LIBMV_IMAGE_MODE_MONO);
if (final_ibuf->channels != 1) {
ImBuf *grayscale_ibuf = make_grayscale_ibuf_copy(final_ibuf);
if (final_ibuf != orig_ibuf) {
/* We dereference original frame later. */
IMB_freeImBuf(final_ibuf);
}
final_ibuf = grayscale_ibuf;
}
}
/* It's possible processing still didn't happen at this point,
* but we really need a copy of the buffer to be transformed
* and to be put to the cache.
*/
if (final_ibuf == orig_ibuf) {
final_ibuf = IMB_dupImBuf(orig_ibuf);
}
IMB_freeImBuf(orig_ibuf);
return final_ibuf;
}
static libmv_CacheKey accessor_get_image_callback(libmv_FrameAccessorUserData *user_data,
int clip_index,
int frame,
libmv_InputMode input_mode,
int downscale,
const libmv_Region *region,
const libmv_FrameTransform *transform,
float **destination,
int *width,
int *height,
int *channels)
{
TrackingImageAccessor *accessor = (TrackingImageAccessor *)user_data;
ImBuf *ibuf;
BLI_assert(clip_index >= 0 && clip_index < accessor->num_clips);
ibuf = accessor_get_ibuf(accessor, clip_index, frame, input_mode, downscale, region, transform);
if (ibuf) {
*destination = ibuf->float_buffer.data;
*width = ibuf->x;
*height = ibuf->y;
*channels = ibuf->channels;
}
else {
*destination = nullptr;
*width = 0;
*height = 0;
*channels = 0;
}
return ibuf;
}
static void accessor_release_image_callback(libmv_CacheKey cache_key)
{
ImBuf *ibuf = (ImBuf *)cache_key;
IMB_freeImBuf(ibuf);
}
static libmv_CacheKey accessor_get_mask_for_track_callback(libmv_FrameAccessorUserData *user_data,
int clip_index,
int frame,
int track_index,
const libmv_Region *region,
float **r_destination,
int *r_width,
int *r_height)
{
/* Perform sanity checks first. */
TrackingImageAccessor *accessor = (TrackingImageAccessor *)user_data;
BLI_assert(clip_index < accessor->num_clips);
BLI_assert(track_index < accessor->num_tracks);
MovieTrackingTrack *track = accessor->tracks[track_index];
/* Early output, track does not use mask. */
if ((track->algorithm_flag & TRACK_ALGORITHM_FLAG_USE_MASK) == 0) {
return nullptr;
}
MovieClip *clip = accessor->clips[clip_index];
/* Construct fake user so we can access movie clip. */
MovieClipUser user;
int scene_frame = BKE_movieclip_remap_clip_to_scene_frame(clip, frame);
BKE_movieclip_user_set_frame(&user, scene_frame);
user.render_size = MCLIP_PROXY_RENDER_SIZE_FULL;
user.render_flag = 0;
/* Get frame width and height so we can convert stroke coordinates
* and other things from normalized to pixel space.
*/
int frame_width, frame_height;
BKE_movieclip_get_size(clip, &user, &frame_width, &frame_height);
/* Actual mask sampling. */
MovieTrackingMarker *marker = BKE_tracking_marker_get_exact(track, frame);
const float region_min[2] = {
region->min[0] - marker->pos[0] * frame_width,
region->min[1] - marker->pos[1] * frame_height,
};
const float region_max[2] = {
region->max[0] - marker->pos[0] * frame_width,
region->max[1] - marker->pos[1] * frame_height,
};
*r_destination = tracking_track_get_mask_for_region(
frame_width, frame_height, region_min, region_max, track);
*r_width = region->max[0] - region->min[0];
*r_height = region->max[1] - region->min[1];
return *r_destination;
}
static void accessor_release_mask_callback(libmv_CacheKey cache_key)
{
if (cache_key != nullptr) {
float *mask = (float *)cache_key;
MEM_freeN(mask);
}
}
TrackingImageAccessor *tracking_image_accessor_new(MovieClip *clips[MAX_ACCESSOR_CLIP],
int num_clips,
MovieTrackingTrack **tracks,
int num_tracks)
{
TrackingImageAccessor *accessor = MEM_cnew<TrackingImageAccessor>("tracking image accessor");
BLI_assert(num_clips <= MAX_ACCESSOR_CLIP);
memcpy(accessor->clips, clips, num_clips * sizeof(MovieClip *));
accessor->num_clips = num_clips;
accessor->tracks = MEM_cnew_array<MovieTrackingTrack *>(num_tracks, "image accessor tracks");
memcpy(accessor->tracks, tracks, num_tracks * sizeof(MovieTrackingTrack *));
accessor->num_tracks = num_tracks;
accessor->libmv_accessor = libmv_FrameAccessorNew((libmv_FrameAccessorUserData *)accessor,
accessor_get_image_callback,
accessor_release_image_callback,
accessor_get_mask_for_track_callback,
accessor_release_mask_callback);
BLI_spin_init(&accessor->cache_lock);
return accessor;
}
void tracking_image_accessor_destroy(TrackingImageAccessor *accessor)
{
libmv_FrameAccessorDestroy(accessor->libmv_accessor);
BLI_spin_end(&accessor->cache_lock);
MEM_freeN(accessor->tracks);
MEM_freeN(accessor);
}
/** \} */
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