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From: toqsxw@gmail.com
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To: ffmpeg-devel@ffmpeg.org
Date: Wed, 2 Apr 2025 01:16:13 +0800
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Subject: [FFmpeg-devel] [PATCH v1 16/19] avcodec/vvc/sei: add
decode_frame_field_info
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From: Wu Jianhua <toqsxw@outlook.com>
Signed-off-by: Wu Jianhua <toqsxw@outlook.com>
---
libavcodec/vvc/sei.c | 26 ++++++++++++++++++++++++++
libavcodec/vvc/sei.h | 1 +
2 files changed, 27 insertions(+)
diff --git a/libavcodec/vvc/sei.c b/libavcodec/vvc/sei.c
index 85a07dad3f..a029306abd 100644
--- a/libavcodec/vvc/sei.c
+++ b/libavcodec/vvc/sei.c
@@ -127,6 +127,27 @@ static int decode_content_light_level_info(H2645SEIContentLight *h, const SEIRaw
return 0;
}
+static int decode_frame_field_info(H274SEIFrameFieldInfo *h, const SEIRawFrameFieldInformation *s)
+{
+ if (s->ffi_source_scan_type > 3)
+ return AVERROR_INVALIDDATA;
+
+ h->present = 1;
+ if (s->ffi_field_pic_flag) {
+ if (s->ffi_bottom_field_flag)
+ h->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
+ else
+ h->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
+ } else {
+ h->display_elemental_periods = s->ffi_display_elemental_periods_minus1 + 1;
+ }
+
+ h->source_scan_type = s->ffi_source_scan_type;
+ h->duplicate_flag = s->ffi_duplicate_flag;
+
+ return 0;
+}
+
int ff_vvc_sei_decode(VVCSEI *s, const H266RawSEI *sei, const struct VVCFrameContext *fc)
{
H2645SEI *c = &s->common;
@@ -155,6 +176,9 @@ int ff_vvc_sei_decode(VVCSEI *s, const H266RawSEI *sei, const struct VVCFrameCon
case SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
return decode_content_light_level_info(&s->common.content_light, payload);
+ case SEI_TYPE_FRAME_FIELD_INFO:
+ return decode_frame_field_info(&s->frame_field_info, payload);
+
default:
av_log(fc->log_ctx, AV_LOG_DEBUG, "Skipped %s SEI %d\n",
sei->nal_unit_header.nal_unit_type == VVC_PREFIX_SEI_NUT ?
@@ -169,6 +193,7 @@ int ff_vvc_sei_decode(VVCSEI *s, const H266RawSEI *sei, const struct VVCFrameCon
int ff_vvc_sei_replace(VVCSEI *dst, const VVCSEI *src)
{
dst->picture_hash.present = 0; // drop hash
+ dst->frame_field_info.present = 0; // drop field info
return ff_h2645_sei_ctx_replace(&dst->common, &src->common);
}
@@ -177,6 +202,7 @@ void ff_vvc_sei_reset(VVCSEI *s)
ff_h2645_sei_reset(&s->common);
ff_h274_hash_freep(&s->hash_ctx);
s->picture_hash.present = 0;
+ s->frame_field_info.present = 0;
}
int ff_vvc_sei_verify_hash(VVCSEI *s, const AVFrame *frame, const int coded_width, const int coded_height)
diff --git a/libavcodec/vvc/sei.h b/libavcodec/vvc/sei.h
index a8aedc2837..8d19f22bb3 100644
--- a/libavcodec/vvc/sei.h
+++ b/libavcodec/vvc/sei.h
@@ -36,6 +36,7 @@
typedef struct VVCSEI {
H2645SEI common;
H274SEIPictureHash picture_hash;
+ H274SEIFrameFieldInfo frame_field_info;
H274HashContext *hash_ctx;
} VVCSEI;
--
2.44.0.windows.1
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