[PATCH v1 06/24] media: v4l2: Trace calculated p/b0/b1 initial reflist

Nicolas Dufresne
2022-03-28T20:00:10Z

This is crucial in verifying that the ordering is right, specially with
more complex sorting needed for field decoding.

Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
---
drivers/media/v4l2-core/v4l2-h264.c | 86 +++++++++++++++++++++++++++++
1 file changed, 86 insertions(+)

diff --git a/drivers/media/v4l2-core/v4l2-h264.c b/drivers/media/v4l2-core/v4l2-h264.c
index d5698c981973..c9e18fd51d78 100644
--- a/drivers/media/v4l2-core/v4l2-h264.c
+++ b/drivers/media/v4l2-core/v4l2-h264.c
@@ -241,6 +241,87 @@ static int v4l2_h264_b1_ref_list_cmp(const void *ptra, const void *ptrb,
return poca < pocb ? -1 : 1;
}

+static char ref_type_to_char (u8 ref_type)
+{
+ switch (ref_type) {
+ case V4L2_H264_FRAME_REF:
+ return 'f';
+ case V4L2_H264_TOP_FIELD_REF:
+ return 't';
+ case V4L2_H264_BOTTOM_FIELD_REF:
+ return 'b';
+ }
+
+ return '?';
+}
+
+static const char *format_ref_list_p(const struct v4l2_h264_reflist_builder *builder,
+ struct v4l2_h264_reference *reflist,
+ char *out_str, const int len)
+{
+ int n = 0, i;
+
+ n += snprintf(out_str + n, len - n, "|");
+
+ for (i = 0; i < builder->num_valid; i++) {
+ /* this is pic_num for frame and frame_num (wrapped) for field,
+ * but for frame pic_num is equal to frame_num (wrapped).
+ */
+ int frame_num = builder->refs[reflist[i].index].frame_num;
+ bool longterm = builder->refs[reflist[i].index].longterm;
+
+ n += scnprintf(out_str + n, len - n, "%i%c%c|",
+ frame_num, longterm ? 'l' : 's',
+ ref_type_to_char (reflist[i].fields));
+ }
+
+ return out_str;
+}
+
+static void print_ref_list_p(const struct v4l2_h264_reflist_builder *builder,
+ struct v4l2_h264_reference *reflist)
+{
+ char buf[1024];
+
+ pr_debug("ref_pic_list_p (cur_poc %u%c) %s\n",
+ builder->cur_pic_order_count,
+ ref_type_to_char(builder->cur_pic_fields),
+ format_ref_list_p(builder, reflist, buf, sizeof(buf)));
+}
+
+static const char *format_ref_list_b(const struct v4l2_h264_reflist_builder *builder,
+ struct v4l2_h264_reference *reflist,
+ char *out_str, const int len)
+{
+ int n = 0, i;
+
+ n += snprintf(out_str + n, len - n, "|");
+
+ for (i = 0; i < builder->num_valid; i++) {
+ int frame_num = builder->refs[reflist[i].index].frame_num;
+ u32 poc = v4l2_h264_get_poc(builder, reflist + i);
+ bool longterm = builder->refs[reflist[i].index].longterm;
+
+ n += scnprintf(out_str + n, len - n, "%i%c%c|",
+ longterm ? frame_num : poc,
+ longterm ? 'l' : 's',
+ ref_type_to_char(reflist[i].fields));
+ }
+
+ return out_str;
+}
+
+static void print_ref_list_b(const struct v4l2_h264_reflist_builder *builder,
+ struct v4l2_h264_reference *reflist, u8 list_num)
+{
+ char buf[1024];
+
+ pr_debug("ref_pic_list_b%u (cur_poc %u%c) %s",
+ list_num, builder->cur_pic_order_count,
+ ref_type_to_char (builder->cur_pic_fields),
+ format_ref_list_b(builder, reflist, buf, sizeof(buf)));
+}
+
/**
* v4l2_h264_build_p_ref_list() - Build the P reference list
*
@@ -261,6 +342,8 @@ v4l2_h264_build_p_ref_list(const struct v4l2_h264_reflist_builder *builder,
sizeof(builder->unordered_reflist[0]) * builder->num_valid);
sort_r(reflist, builder->num_valid, sizeof(*reflist),
v4l2_h264_p_ref_list_cmp, NULL, builder);
+
+ print_ref_list_p(builder, reflist);
}
EXPORT_SYMBOL_GPL(v4l2_h264_build_p_ref_list);

@@ -296,6 +379,9 @@ v4l2_h264_build_b_ref_lists(const struct v4l2_h264_reflist_builder *builder,
if (builder->num_valid > 1 &&
!memcmp(b1_reflist, b0_reflist, builder->num_valid))
swap(b1_reflist[0], b1_reflist[1]);
+
+ print_ref_list_b(builder, b0_reflist, 0);
+ print_ref_list_b(builder, b1_reflist, 1);
}
EXPORT_SYMBOL_GPL(v4l2_h264_build_b_ref_lists);

--
2.34.1