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tornavis/source/blender/blenkernel/intern/tracking_auto.c

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/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2011 Blender Foundation.
* All rights reserved.
*/
/** \file
* \ingroup bke
*/
#include "atomic_ops.h"
#include <stdlib.h>
#include "MEM_guardedalloc.h"
#include "DNA_movieclip_types.h"
#include "DNA_object_types.h" /* SELECT */
#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_task.h"
#include "BLI_threads.h"
#include "BLI_utildefines.h"
#include "PIL_time.h"
#include "BKE_global.h"
#include "BKE_movieclip.h"
#include "BKE_tracking.h"
#include "libmv-capi.h"
#include "tracking_private.h"
typedef struct AutoTrackClip {
MovieClip *clip;
/* Dimensions of movie frame, in pixels.
*
* NOTE: All frames within a clip are expected to have match3ed dimensions. */
int width, height;
} AutoTrackClip;
typedef struct AutoTrackTrack {
/* Index of a clip from `AutoTrackContext::autotrack_clips` this track belongs to. */
int clip_index;
MovieTrackingTrack *track;
/* Options for the region tracker. */
libmv_TrackRegionOptions track_region_options;
/* Denotes whether this track will be tracked.
* Is usually initialized based on track's selection. Non-trackable tracks are still added to the
* context to provide AutoTrack all knowledge about what is going on in the scene. */
bool is_trackable;
} AutoTrackTrack;
typedef struct AutoTrackMarker {
libmv_Marker libmv_marker;
} AutoTrackMarker;
/* Result of tracking step for a single marker.
*
* On success both marker and result are fully initialized to the position on the new frame.
*
* On failure marker's frame number is initialized to frame number where it was attempted to be
* tracked to. The position and other fields of tracked marker are the same as the input. */
typedef struct AutoTrackTrackingResult {
struct AutoTrackTrackingResult *next, *prev;
bool success;
libmv_Marker libmv_marker;
libmv_TrackRegionResult libmv_result;
} AutoTrackTrackingResult;
typedef struct AutoTrackContext {
/* --------------------------------------------------------------------
* Invariant part.
* Stays unchanged during the tracking process.
* If not the initialization process, all the fields here should be treated as `const`.
*/
/* Frame at which tracking process started.
* NOTE: Measured in scene time frames, */
int start_scene_frame;
/* True when tracking backwards (from higher frame number to lower frame number.) */
bool is_backwards;
/* Movie clips used during the tracking process. */
int num_clips;
AutoTrackClip autotrack_clips[MAX_ACCESSOR_CLIP];
/* Tracks for which the context has been created for.
* This is a flat array of all tracks coming from all clips, regardless of whether track is
* actually being tracked or not. This allows the AutoTrack to see a big picture of hat is going
* on in the scene, and request information it needs.
*
* Indexed by AutoTrackOptions::track_index. */
int num_all_tracks;
AutoTrackTrack *all_autotrack_tracks;
/* Accessor for images of clip. Used by the autotrack context. */
TrackingImageAccessor *image_accessor;
/* --------------------------------------------------------------------
* Variant part.
* Denotes tracing state and tracking result.
*/
/* Auto-track context.
*
* NOTE: Is accessed from multiple threads at once. */
struct libmv_AutoTrack *autotrack;
/* Markers from the current frame which will be tracked to the next frame upon the tracking
* context step.
*
* NOTE: This array is re-used across tracking steps, which might make it appear that the array
* is over-allocated when some tracks has failed to track. */
int num_autotrack_markers;
AutoTrackMarker *autotrack_markers;
/* Tracking results which are to be synchronized from the AutoTrack context to the Blender's
* DNA to make the results visible for users. */
ListBase results_to_sync;
int synchronized_scene_frame;
SpinLock spin_lock;
} AutoTrackContext;
/* -------------------------------------------------------------------- */
/** \name Marker coordinate system conversion.
* \{ */
static void normalized_to_libmv_frame(const float normalized[2],
const int frame_dimensions[2],
float result[2])
{
result[0] = normalized[0] * frame_dimensions[0] - 0.5f;
result[1] = normalized[1] * frame_dimensions[1] - 0.5f;
}
static void normalized_relative_to_libmv_frame(const float normalized[2],
const float origin[2],
const int frame_dimensions[2],
float result[2])
{
result[0] = (normalized[0] + origin[0]) * frame_dimensions[0] - 0.5f;
result[1] = (normalized[1] + origin[1]) * frame_dimensions[1] - 0.5f;
}
static void libmv_frame_to_normalized(const float frame_coord[2],
const int frame_dimensions[2],
float result[2])
{
result[0] = (frame_coord[0] + 0.5f) / frame_dimensions[0];
result[1] = (frame_coord[1] + 0.5f) / frame_dimensions[1];
}
static void libmv_frame_to_normalized_relative(const float frame_coord[2],
const float origin[2],
const int frame_dimensions[2],
float result[2])
{
result[0] = (frame_coord[0] - origin[0]) / frame_dimensions[0];
result[1] = (frame_coord[1] - origin[1]) / frame_dimensions[1];
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Conversion of markers between Blender's DNA and Libmv.
* \{ */
static void dna_marker_to_libmv_marker(/*const*/ MovieTrackingTrack *track,
const MovieTrackingMarker *marker,
int clip,
int track_index,
int frame_width,
int frame_height,
bool backwards,
libmv_Marker *libmv_marker)
{
const int frame_dimensions[2] = {frame_width, frame_height};
libmv_marker->clip = clip;
libmv_marker->frame = marker->framenr;
libmv_marker->track = track_index;
normalized_to_libmv_frame(marker->pos, frame_dimensions, libmv_marker->center);
for (int i = 0; i < 4; i++) {
normalized_relative_to_libmv_frame(
marker->pattern_corners[i], marker->pos, frame_dimensions, libmv_marker->patch[i]);
}
normalized_relative_to_libmv_frame(
marker->search_min, marker->pos, frame_dimensions, libmv_marker->search_region_min);
normalized_relative_to_libmv_frame(
marker->search_max, marker->pos, frame_dimensions, libmv_marker->search_region_max);
/* NOTE: All the markers does have 1.0 weight.
* Might support in the future, but will require more elaborated process which will involve
* F-Curve evaluation. */
libmv_marker->weight = 1.0f;
if (marker->flag & MARKER_TRACKED) {
libmv_marker->source = LIBMV_MARKER_SOURCE_TRACKED;
}
else {
libmv_marker->source = LIBMV_MARKER_SOURCE_MANUAL;
}
libmv_marker->status = LIBMV_MARKER_STATUS_UNKNOWN;
libmv_marker->model_type = LIBMV_MARKER_MODEL_TYPE_POINT;
libmv_marker->model_id = 0;
/* NOTE: We currently don't support reference marker from different clip. */
libmv_marker->reference_clip = clip;
if (track->pattern_match == TRACK_MATCH_KEYFRAME) {
const MovieTrackingMarker *keyframe_marker = tracking_get_keyframed_marker(
track, marker->framenr, backwards);
libmv_marker->reference_frame = keyframe_marker->framenr;
}
else {
libmv_marker->reference_frame = backwards ? marker->framenr - 1 : marker->framenr;
}
libmv_marker->disabled_channels =
((track->flag & TRACK_DISABLE_RED) ? LIBMV_MARKER_CHANNEL_R : 0) |
((track->flag & TRACK_DISABLE_GREEN) ? LIBMV_MARKER_CHANNEL_G : 0) |
((track->flag & TRACK_DISABLE_BLUE) ? LIBMV_MARKER_CHANNEL_B : 0);
}
static void libmv_marker_to_dna_marker(libmv_Marker *libmv_marker,
int frame_width,
int frame_height,
MovieTrackingMarker *marker)
{
const int frame_dimensions[2] = {frame_width, frame_height};
marker->framenr = libmv_marker->frame;
libmv_frame_to_normalized(libmv_marker->center, frame_dimensions, marker->pos);
for (int i = 0; i < 4; i++) {
libmv_frame_to_normalized_relative(libmv_marker->patch[i],
libmv_marker->center,
frame_dimensions,
marker->pattern_corners[i]);
}
libmv_frame_to_normalized_relative(
libmv_marker->search_region_min, libmv_marker->center, frame_dimensions, marker->search_min);
libmv_frame_to_normalized_relative(
libmv_marker->search_region_max, libmv_marker->center, frame_dimensions, marker->search_max);
marker->flag = 0;
if (libmv_marker->source == LIBMV_MARKER_SOURCE_TRACKED) {
marker->flag |= MARKER_TRACKED;
}
else {
marker->flag &= ~MARKER_TRACKED;
}
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name General helpers.
*
* TODO(sergey): Should be moved to tracking_util.c
*
* \{ */
/* Returns false if marker crossed margin area from frame bounds. */
static bool tracking_check_marker_margin(const libmv_Marker *libmv_marker,
int margin,
int frame_width,
int frame_height)
{
float patch_min[2], patch_max[2];
float margin_left, margin_top, margin_right, margin_bottom;
INIT_MINMAX2(patch_min, patch_max);
minmax_v2v2_v2(patch_min, patch_max, libmv_marker->patch[0]);
minmax_v2v2_v2(patch_min, patch_max, libmv_marker->patch[1]);
minmax_v2v2_v2(patch_min, patch_max, libmv_marker->patch[2]);
minmax_v2v2_v2(patch_min, patch_max, libmv_marker->patch[3]);
margin_left = max_ff(libmv_marker->center[0] - patch_min[0], margin);
margin_top = max_ff(patch_max[1] - libmv_marker->center[1], margin);
margin_right = max_ff(patch_max[0] - libmv_marker->center[0], margin);
margin_bottom = max_ff(libmv_marker->center[1] - patch_min[1], margin);
if (libmv_marker->center[0] < margin_left ||
libmv_marker->center[0] > frame_width - margin_right ||
libmv_marker->center[1] < margin_bottom ||
libmv_marker->center[1] > frame_height - margin_top) {
return false;
}
return true;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Autotrack context initialization.
* \{ */
static bool autotrack_is_marker_usable(const MovieTrackingMarker *marker)
{
if (marker->flag & MARKER_DISABLED) {
return false;
}
return true;
}
static bool autotrack_is_track_trackable(const AutoTrackContext *context,
const AutoTrackTrack *autotrack_track)
{
/*const*/ MovieTrackingTrack *track = autotrack_track->track;
if (TRACK_SELECTED(track) && (track->flag & (TRACK_LOCKED | TRACK_HIDDEN)) == 0) {
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[autotrack_track->clip_index];
MovieClip *clip = autotrack_clip->clip;
const int clip_frame_number = BKE_movieclip_remap_scene_to_clip_frame(
clip, context->start_scene_frame);
const MovieTrackingMarker *marker = BKE_tracking_marker_get(track, clip_frame_number);
return autotrack_is_marker_usable(marker);
}
return false;
}
static void autotrack_context_init_clips(AutoTrackContext *context,
MovieClip *clip,
MovieClipUser *user)
{
/* NOTE: Currently only tracking within a single clip. */
context->num_clips = 1;
context->autotrack_clips[0].clip = clip;
BKE_movieclip_get_size(
clip, user, &context->autotrack_clips[0].width, &context->autotrack_clips[0].height);
}
/* Initialize flat list of tracks for quick index-based access for the specified clip.
* All the tracks from this clip are added at the end of the array of already-collected tracks.
*
* NOTE: Clips should be initialized first. */
static void autotrack_context_init_tracks_for_clip(AutoTrackContext *context, int clip_index)
{
BLI_assert(clip_index >= 0);
BLI_assert(clip_index < context->num_clips);
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[clip_index];
MovieClip *clip = autotrack_clip->clip;
MovieTracking *tracking = &clip->tracking;
ListBase *tracks_base = BKE_tracking_get_active_tracks(tracking);
const int num_clip_tracks = BLI_listbase_count(tracks_base);
if (num_clip_tracks == 0) {
return;
}
context->all_autotrack_tracks = MEM_reallocN(context->all_autotrack_tracks,
(context->num_all_tracks + num_clip_tracks) *
sizeof(AutoTrackTrack));
LISTBASE_FOREACH (MovieTrackingTrack *, track, tracks_base) {
AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[context->num_all_tracks++];
autotrack_track->clip_index = clip_index;
autotrack_track->track = track;
autotrack_track->is_trackable = autotrack_is_track_trackable(context, autotrack_track);
tracking_configure_tracker(
track, NULL, context->is_backwards, &autotrack_track->track_region_options);
}
}
/* Initialize flat list of tracks for quick index-based access for all clips used for tracking.
*
* NOTE: Clips should be initialized first. */
static void autotrack_context_init_tracks(AutoTrackContext *context)
{
BLI_assert(context->num_clips >= 1);
for (int clip_index = 0; clip_index < context->num_clips; ++clip_index) {
autotrack_context_init_tracks_for_clip(context, clip_index);
}
}
/* NOTE: Clips should be initialized first. */
static void autotrack_context_init_image_accessor(AutoTrackContext *context)
{
BLI_assert(context->num_clips >= 1);
/* Planarize arrays of clips and tracks, storing pointers to their base "objects".
* This allows image accessor to be independent, but adds some overhead here. Could be solved
* by either more strongly coupling accessor API with the AutoTrack, or by giving some functors
* to the accessor to access clip/track from their indices. */
MovieClip *clips[MAX_ACCESSOR_CLIP];
for (int i = 0; i < context->num_clips; ++i) {
clips[i] = context->autotrack_clips[i].clip;
}
MovieTrackingTrack **tracks = MEM_malloc_arrayN(
context->num_all_tracks, sizeof(MovieTrackingTrack *), "image accessor init tracks");
for (int i = 0; i < context->num_all_tracks; ++i) {
tracks[i] = context->all_autotrack_tracks[i].track;
}
context->image_accessor = tracking_image_accessor_new(clips, 1, tracks, context->num_all_tracks);
MEM_freeN(tracks);
}
/* Count markers which are usable to be passed to the AutoTrack context. */
static size_t autotrack_count_all_usable_markers(AutoTrackContext *context)
{
size_t num_usable_markers = 0;
for (int track_index = 0; track_index < context->num_all_tracks; ++track_index) {
const MovieTrackingTrack *track = context->all_autotrack_tracks[track_index].track;
for (int marker_index = 0; marker_index < track->markersnr; ++marker_index) {
const MovieTrackingMarker *marker = &track->markers[marker_index];
if (!autotrack_is_marker_usable(marker)) {
continue;
}
num_usable_markers++;
}
}
return num_usable_markers;
}
static int autotrack_count_trackable_markers(AutoTrackContext *context)
{
int num_trackable_markers = 0;
for (int track_index = 0; track_index < context->num_all_tracks; ++track_index) {
const AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[track_index];
if (!autotrack_track->is_trackable) {
continue;
}
num_trackable_markers++;
}
return num_trackable_markers;
}
/* Provide Libmv side of auto track all information about given tracks.
* Information from all clips is passed to the auto tracker.
*
* NOTE: Clips and all tracks are to be initialized before calling this. */
static void autotrack_context_init_autotrack(AutoTrackContext *context)
{
context->autotrack = libmv_autoTrackNew(context->image_accessor->libmv_accessor);
/* Count number of markers to be put to a context. */
const size_t num_trackable_markers = autotrack_count_all_usable_markers(context);
if (num_trackable_markers == 0) {
return;
}
/* Allocate memory for all the markers. */
libmv_Marker *libmv_markers = MEM_malloc_arrayN(
num_trackable_markers, sizeof(libmv_Marker), "libmv markers array");
/* Fill in markers array. */
int num_filled_libmv_markers = 0;
for (int track_index = 0; track_index < context->num_all_tracks; ++track_index) {
const AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[track_index];
/*const*/ MovieTrackingTrack *track = autotrack_track->track;
for (int marker_index = 0; marker_index < track->markersnr; ++marker_index) {
/*const*/ MovieTrackingMarker *marker = &track->markers[marker_index];
if (!autotrack_is_marker_usable(marker)) {
continue;
}
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[autotrack_track->clip_index];
dna_marker_to_libmv_marker(track,
marker,
autotrack_track->clip_index,
track_index,
autotrack_clip->width,
autotrack_clip->height,
context->is_backwards,
&libmv_markers[num_filled_libmv_markers++]);
}
}
/* Add all markers to autotrack. */
libmv_autoTrackSetMarkers(context->autotrack, libmv_markers, num_trackable_markers);
/* Free temporary memory. */
MEM_freeN(libmv_markers);
}
static void autotrack_context_init_markers(AutoTrackContext *context)
{
/* Count number of trackable tracks. */
context->num_autotrack_markers = autotrack_count_trackable_markers(context);
if (context->num_autotrack_markers == 0) {
return;
}
/* Allocate required memory. */
context->autotrack_markers = MEM_calloc_arrayN(
context->num_autotrack_markers, sizeof(AutoTrackMarker), "auto track options");
/* Fill in all the markers. */
int autotrack_marker_index = 0;
for (int track_index = 0; track_index < context->num_all_tracks; ++track_index) {
const AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[track_index];
if (!autotrack_track->is_trackable) {
continue;
}
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[autotrack_track->clip_index];
MovieClip *clip = autotrack_clip->clip;
const int clip_frame_number = BKE_movieclip_remap_scene_to_clip_frame(
clip, context->start_scene_frame);
/*const*/ MovieTrackingTrack *track = context->all_autotrack_tracks[track_index].track;
const MovieTrackingMarker *marker = BKE_tracking_marker_get(track, clip_frame_number);
AutoTrackMarker *autotrack_marker = &context->autotrack_markers[autotrack_marker_index++];
dna_marker_to_libmv_marker(track,
marker,
autotrack_track->clip_index,
track_index,
autotrack_clip->width,
autotrack_clip->height,
context->is_backwards,
&autotrack_marker->libmv_marker);
}
}
AutoTrackContext *BKE_autotrack_context_new(MovieClip *clip,
MovieClipUser *user,
const bool is_backwards)
{
AutoTrackContext *context = MEM_callocN(sizeof(AutoTrackContext), "autotrack context");
context->start_scene_frame = user->framenr;
context->is_backwards = is_backwards;
context->synchronized_scene_frame = context->start_scene_frame;
autotrack_context_init_clips(context, clip, user);
autotrack_context_init_tracks(context);
autotrack_context_init_image_accessor(context);
autotrack_context_init_autotrack(context);
autotrack_context_init_markers(context);
BLI_spin_init(&context->spin_lock);
return context;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Threaded context step (tracking process).
* \{ */
/* NOTE: This is a TLS in a sense that this struct is never accessed from multiple threads, and
* that threads are re-using the struct as much as possible. */
typedef struct AutoTrackTLS {
ListBase results; /* Elements of `AutoTrackTrackingResult`. */
} AutoTrackTLS;
static void autotrack_context_step_cb(void *__restrict userdata,
const int marker_index,
const TaskParallelTLS *__restrict tls)
{
AutoTrackContext *context = userdata;
AutoTrackTLS *autotrack_tls = (AutoTrackTLS *)tls->userdata_chunk;
const AutoTrackMarker *autotrack_marker = &context->autotrack_markers[marker_index];
const libmv_Marker *libmv_current_marker = &autotrack_marker->libmv_marker;
const int frame_delta = context->is_backwards ? -1 : 1;
const int clip_index = libmv_current_marker->clip;
const int track_index = libmv_current_marker->track;
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[clip_index];
const AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[track_index];
const MovieTrackingTrack *track = autotrack_track->track;
/* Check whether marker is going outside of allowed frame margin. */
if (!tracking_check_marker_margin(
libmv_current_marker, track->margin, autotrack_clip->width, autotrack_clip->height)) {
return;
}
const int new_marker_frame = libmv_current_marker->frame + frame_delta;
AutoTrackTrackingResult *autotrack_result = MEM_mallocN(sizeof(AutoTrackTrackingResult),
"autotrack result");
autotrack_result->libmv_marker = *libmv_current_marker;
autotrack_result->libmv_marker.frame = new_marker_frame;
/* Update reference frame. */
libmv_Marker libmv_reference_marker;
if (track->pattern_match == TRACK_MATCH_KEYFRAME) {
autotrack_result->libmv_marker.reference_frame = libmv_current_marker->reference_frame;
libmv_autoTrackGetMarker(context->autotrack,
clip_index,
autotrack_result->libmv_marker.reference_frame,
track_index,
&libmv_reference_marker);
}
else {
BLI_assert(track->pattern_match == TRACK_MATCH_PREVIOS_FRAME);
autotrack_result->libmv_marker.reference_frame = libmv_current_marker->frame;
libmv_reference_marker = *libmv_current_marker;
}
/* Perform actual tracking. */
autotrack_result->success = libmv_autoTrackMarker(context->autotrack,
&autotrack_track->track_region_options,
&autotrack_result->libmv_marker,
&autotrack_result->libmv_result);
/* If tracking failed restore initial position.
* This is how Blender side is currently expecting failed track to be handled. Without this the
* marker is left in an arbitrary position which did not provide good correlation. */
if (!autotrack_result->success) {
autotrack_result->libmv_marker = *libmv_current_marker;
autotrack_result->libmv_marker.frame = new_marker_frame;
}
BLI_addtail(&autotrack_tls->results, autotrack_result);
}
static void autotrack_context_reduce(const void *__restrict UNUSED(userdata),
void *__restrict chunk_join,
void *__restrict chunk)
{
AutoTrackTLS *autotrack_tls = (AutoTrackTLS *)chunk;
if (BLI_listbase_is_empty(&autotrack_tls->results)) {
/* Nothing to be joined from. */
return;
}
AutoTrackTLS *autotrack_tls_join = (AutoTrackTLS *)chunk_join;
BLI_movelisttolist(&autotrack_tls_join->results, &autotrack_tls->results);
}
bool BKE_autotrack_context_step(AutoTrackContext *context)
{
if (context->num_autotrack_markers == 0) {
return false;
}
AutoTrackTLS tls;
BLI_listbase_clear(&tls.results);
TaskParallelSettings settings;
BLI_parallel_range_settings_defaults(&settings);
settings.use_threading = (context->num_autotrack_markers > 1);
settings.userdata_chunk = &tls;
settings.userdata_chunk_size = sizeof(AutoTrackTLS);
settings.func_reduce = autotrack_context_reduce;
BLI_task_parallel_range(
0, context->num_autotrack_markers, context, autotrack_context_step_cb, &settings);
/* Prepare next tracking step by updating the AutoTrack context with new markers and moving
* tracked markers as an input for the next iteration. */
context->num_autotrack_markers = 0;
LISTBASE_FOREACH (AutoTrackTrackingResult *, autotrack_result, &tls.results) {
if (!autotrack_result->success) {
continue;
}
/* Insert tracking results to the AutoTrack context to make them usable for the next frame
* tracking iteration. */
libmv_autoTrackAddMarker(context->autotrack, &autotrack_result->libmv_marker);
/* Update the list of markers which will be tracked on the next iteration. */
context->autotrack_markers[context->num_autotrack_markers++].libmv_marker =
autotrack_result->libmv_marker;
}
BLI_spin_lock(&context->spin_lock);
BLI_movelisttolist(&context->results_to_sync, &tls.results);
BLI_spin_unlock(&context->spin_lock);
return true;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Context data synchronization.
*
* Used to copy tracking result to Blender side, while the tracking is still happening in its
* thread.
*
* \{ */
void BKE_autotrack_context_sync(AutoTrackContext *context)
{
const int frame_delta = context->is_backwards ? -1 : 1;
BLI_spin_lock(&context->spin_lock);
ListBase results_to_sync = context->results_to_sync;
BLI_listbase_clear(&context->results_to_sync);
BLI_spin_unlock(&context->spin_lock);
LISTBASE_FOREACH_MUTABLE (AutoTrackTrackingResult *, autotrack_result, &results_to_sync) {
const libmv_Marker *libmv_marker = &autotrack_result->libmv_marker;
const int clip_index = libmv_marker->clip;
const int track_index = libmv_marker->track;
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[clip_index];
const MovieClip *clip = autotrack_clip->clip;
const AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[track_index];
MovieTrackingTrack *track = autotrack_track->track;
const int start_clip_frame = BKE_movieclip_remap_scene_to_clip_frame(
clip, context->start_scene_frame);
const int first_result_frame = start_clip_frame + frame_delta;
/* Insert marker which corresponds to the tracking result. */
MovieTrackingMarker marker;
libmv_marker_to_dna_marker(
&autotrack_result->libmv_marker, autotrack_clip->width, autotrack_clip->height, &marker);
if (!autotrack_result->success) {
marker.flag |= MARKER_DISABLED;
}
BKE_tracking_marker_insert(track, &marker);
/* Insert disabled marker at the end of tracked segment.
* When tracking forward the disabled marker is added at the next frame from the result,
* when tracking backwards the marker is added at the previous frame. */
tracking_marker_insert_disabled(track, &marker, context->is_backwards, false);
if (marker.framenr == first_result_frame) {
MovieTrackingMarker *prev_marker = BKE_tracking_marker_get_exact(
track, marker.framenr - frame_delta);
BLI_assert(prev_marker != NULL);
tracking_marker_insert_disabled(track, prev_marker, !context->is_backwards, false);
}
/* Update synchronized frame to the latest tracked fame from the current results. */
const int marker_scene_frame = BKE_movieclip_remap_clip_to_scene_frame(clip, marker.framenr);
if (context->is_backwards) {
context->synchronized_scene_frame = min_ii(context->synchronized_scene_frame,
marker_scene_frame);
}
else {
context->synchronized_scene_frame = max_ii(context->synchronized_scene_frame,
marker_scene_frame);
}
MEM_freeN(autotrack_result);
}
for (int clip_index = 0; clip_index < context->num_clips; clip_index++) {
MovieTracking *tracking = &context->autotrack_clips[clip_index].clip->tracking;
BKE_tracking_dopesheet_tag_update(tracking);
}
}
/* TODO(sergey): Find a way to avoid this, somehow making all needed logic in
* BKE_autotrack_context_sync(). */
void BKE_autotrack_context_sync_user(AutoTrackContext *context, MovieClipUser *user)
{
user->framenr = context->synchronized_scene_frame;
}
/** \} */
/* -------------------------------------------------------------------- */
/** \name Finalization.
* \{ */
void BKE_autotrack_context_finish(AutoTrackContext *context)
{
for (int clip_index = 0; clip_index < context->num_clips; clip_index++) {
const AutoTrackClip *autotrack_clip = &context->autotrack_clips[clip_index];
MovieClip *clip = autotrack_clip->clip;
ListBase *plane_tracks_base = BKE_tracking_get_active_plane_tracks(&clip->tracking);
const int start_clip_frame = BKE_movieclip_remap_scene_to_clip_frame(
clip, context->start_scene_frame);
LISTBASE_FOREACH (MovieTrackingPlaneTrack *, plane_track, plane_tracks_base) {
if (plane_track->flag & PLANE_TRACK_AUTOKEY) {
continue;
}
for (int track_index = 0; track_index < context->num_all_tracks; track_index++) {
const AutoTrackTrack *autotrack_track = &context->all_autotrack_tracks[track_index];
if (!autotrack_track->is_trackable) {
continue;
}
MovieTrackingTrack *track = autotrack_track->track;
if (BKE_tracking_plane_track_has_point_track(plane_track, track)) {
BKE_tracking_track_plane_from_existing_motion(plane_track, start_clip_frame);
break;
}
}
}
}
}
void BKE_autotrack_context_free(AutoTrackContext *context)
{
if (context->autotrack != NULL) {
libmv_autoTrackDestroy(context->autotrack);
}
if (context->image_accessor != NULL) {
tracking_image_accessor_destroy(context->image_accessor);
}
MEM_SAFE_FREE(context->all_autotrack_tracks);
MEM_SAFE_FREE(context->autotrack_markers);
BLI_freelistN(&context->results_to_sync);
BLI_spin_end(&context->spin_lock);
MEM_freeN(context);
}
/** \} */
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