On 4/25/2025 7:08 PM, Andreas Rheinhardt wrote:
toq...@gmail.com:From: Wu Jianhua <toq...@outlook.com>Signed-off-by: Wu Jianhua <toq...@outlook.com> --- libavcodec/cbs_h2645.c | 6 ++++++ libavcodec/cbs_sei.h | 12 ++++++++++++ libavcodec/cbs_sei_syntax_template.c | 26 ++++++++++++++++++++++++++ 3 files changed, 44 insertions(+) diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c index c868770209..6677134d77 100644 --- a/libavcodec/cbs_h2645.c +++ b/libavcodec/cbs_h2645.c @@ -2199,6 +2199,12 @@ static const SEIMessageTypeDescriptor cbs_sei_common_types[] = { sizeof(SEIRawDisplayOrientation), SEI_MESSAGE_RW(sei, display_orientation) }, + { + SEI_TYPE_FRAME_FIELD_INFO, + 1, 0, + sizeof(SEIRawFrameFieldInformation), + SEI_MESSAGE_RW(sei, frame_field_information) + }, SEI_MESSAGE_TYPE_END, };diff --git a/libavcodec/cbs_sei.h b/libavcodec/cbs_sei.hindex 7be12e33e0..81867b79a7 100644 --- a/libavcodec/cbs_sei.h +++ b/libavcodec/cbs_sei.h @@ -125,6 +125,18 @@ typedef struct SEIRawDisplayOrientation { uint8_t display_orientation_reserved_zero_3bits; } SEIRawDisplayOrientation;+typedef struct SEIRawFrameFieldInformation {+ uint8_t ffi_field_pic_flag; + uint8_t ffi_bottom_field_flag; + uint8_t ffi_pairing_indicated_flag; + uint8_t ffi_paired_with_next_field_flag; + uint8_t ffi_display_fields_from_frame_flag; + uint8_t ffi_top_field_first_flag; + uint8_t ffi_display_elemental_periods_minus1; + uint8_t ffi_source_scan_type; + uint8_t ffi_duplicate_flag; +} SEIRawFrameFieldInformation; + typedef struct SEIRawMessage { uint32_t payload_type; uint32_t payload_size; diff --git a/libavcodec/cbs_sei_syntax_template.c b/libavcodec/cbs_sei_syntax_template.c index fb19f6ee42..e6863a0fd7 100644 --- a/libavcodec/cbs_sei_syntax_template.c +++ b/libavcodec/cbs_sei_syntax_template.c @@ -295,6 +295,32 @@ SEI_FUNC(display_orientation, (CodedBitstreamContext *ctx, RWContext *rw, return 0; }+SEI_FUNC(frame_field_information, (CodedBitstreamContext *ctx, RWContext *rw,+ SEIRawFrameFieldInformation *current, + SEIMessageState *state)) +{ + int err; + + HEADER("Frame-field information"); + + flag(ffi_field_pic_flag); + if (current->ffi_field_pic_flag) { + flag(ffi_bottom_field_flag); + flag(ffi_pairing_indicated_flag); + if (current->ffi_pairing_indicated_flag) + flag(ffi_paired_with_next_field_flag); + } else { + flag(ffi_display_fields_from_frame_flag); + if (current->ffi_display_fields_from_frame_flag) + flag(ffi_top_field_first_flag); + u(8, ffi_display_elemental_periods_minus1, 0, 0xff); + } + u(2, ffi_source_scan_type, 0, 3); + flag(ffi_duplicate_flag); + + return 0; +} + static int FUNC(message)(CodedBitstreamContext *ctx, RWContext *rw, SEIRawMessage *current) {This does really not seem like a common SEI, yet you add it to the common ones.
It's in ITU-T H.274, which is what the common list contains. It's used as fallback if a SEI type is not a H.26x specific one.
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