[FFmpeg-devel] [PATCH V8 2/3] lavfi: show side data of detection bounding boxes

[Guo, Yejun]

---
 libavfilter/f_sidedata.c  |  2 ++
 libavfilter/vf_showinfo.c | 29 +++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/libavfilter/f_sidedata.c b/libavfilter/f_sidedata.c
index 3757723375..6f25d2b311 100644
--- a/libavfilter/f_sidedata.c
+++ b/libavfilter/f_sidedata.c
@@ -71,6 +71,7 @@ static const AVOption filt_name##_options[] = { \
     {   "S12M_TIMECOD",               "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_S12M_TIMECODE              }, 0, 0, FLAGS, "type" }, \
     {   "DYNAMIC_HDR_PLUS",           "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_DYNAMIC_HDR_PLUS           }, 0, 0, FLAGS, "type" }, \
     {   "REGIONS_OF_INTEREST",        "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_REGIONS_OF_INTEREST        }, 0, 0, FLAGS, "type" }, \
+    {   "DETECTION_BOUNDING_BOXES",   "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_DETECTION_BBOXES           }, 0, 0, FLAGS, "type" }, \
     {   "SEI_UNREGISTERED",           "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_SEI_UNREGISTERED           }, 0, 0, FLAGS, "type" }, \
     { NULL } \
 }
@@ -100,6 +101,7 @@ static const AVOption filt_name##_options[] = { \
     {   "S12M_TIMECOD",               "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_S12M_TIMECODE              }, 0, 0, FLAGS, "type" }, \
     {   "DYNAMIC_HDR_PLUS",           "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_DYNAMIC_HDR_PLUS           }, 0, 0, FLAGS, "type" }, \
     {   "REGIONS_OF_INTEREST",        "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_REGIONS_OF_INTEREST        }, 0, 0, FLAGS, "type" }, \
+    {   "DETECTION_BOUNDING_BOXES",   "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_DETECTION_BBOXES           }, 0, 0, FLAGS, "type" }, \
     {   "SEI_UNREGISTERED",           "", 0,             AV_OPT_TYPE_CONST,  {.i64 = AV_FRAME_DATA_SEI_UNREGISTERED           }, 0, 0, FLAGS, "type" }, \
     { NULL } \
 }
diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c
index 6208892005..ae6f6bb7b1 100644
--- a/libavfilter/vf_showinfo.c
+++ b/libavfilter/vf_showinfo.c
@@ -38,6 +38,7 @@
 #include "libavutil/timecode.h"
 #include "libavutil/mastering_display_metadata.h"
 #include "libavutil/video_enc_params.h"
+#include "libavutil/detection_bbox.h"
 
 #include "avfilter.h"
 #include "internal.h"
@@ -153,6 +154,31 @@ static void dump_roi(AVFilterContext *ctx, const AVFrameSideData *sd)
     }
 }
 
+static void dump_detection_bbox(AVFilterContext *ctx, const AVFrameSideData *sd)
+{
+    int nb_bboxes;
+    const AVDetectionBBoxHeader *header;
+    const AVDetectionBBox *bbox;
+
+    header = (const AVDetectionBBoxHeader *)sd->data;
+    nb_bboxes = header->nb_bboxes;
+    av_log(ctx, AV_LOG_INFO, "detection bounding boxes:\n");
+    av_log(ctx, AV_LOG_INFO, "source: %s\n", header->source);
+
+    for (int i = 0; i < nb_bboxes; i++) {
+        bbox = av_get_detection_bbox(header, i);
+        av_log(ctx, AV_LOG_INFO, "index: %d,\tregion: (%d, %d) -> (%d, %d), label: %s, confidence: %d/%d.\n",
+                                 i, bbox->x, bbox->y, bbox->x + bbox->w, bbox->y + bbox->h,
+                                 bbox->detect_label, bbox->detect_confidence.num, bbox->detect_confidence.den);
+        if (bbox->classify_count > 0) {
+            for (int j = 0; j < bbox->classify_count; j++) {
+                av_log(ctx, AV_LOG_INFO, "\t\tclassify:  label: %s, confidence: %d/%d.\n",
+                       bbox->classify_labels[j], bbox->classify_confidences[j].num, bbox->classify_confidences[j].den);
+            }
+        }
+    }
+}
+
 static void dump_mastering_display(AVFilterContext *ctx, const AVFrameSideData *sd)
 {
     const AVMasteringDisplayMetadata *mastering_display;
@@ -494,6 +520,9 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
         case AV_FRAME_DATA_REGIONS_OF_INTEREST:
             dump_roi(ctx, sd);
             break;
+        case AV_FRAME_DATA_DETECTION_BBOXES:
+            dump_detection_bbox(ctx, sd);
+            break;
         case AV_FRAME_DATA_MASTERING_DISPLAY_METADATA:
             dump_mastering_display(ctx, sd);
             break;
-- 
2.17.1