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avcodec/cbs_h265: add support for 3D Reference Displays Information SEI

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2024-06-06 20:54:07 -03:00
parent 64807ccc91
commit 27eb55a9c9
3 changed files with 64 additions and 0 deletions
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6
libavcodec/cbs_h2645.c
View file

@ -2275,6 +2275,12 @@ static const SEIMessageTypeDescriptor cbs_sei_h265_types[] = {
sizeof(H265RawSEIAlphaChannelInfo),
SEI_MESSAGE_RW(h265, sei_alpha_channel_info),
},
{
SEI_TYPE_THREE_DIMENSIONAL_REFERENCE_DISPLAYS_INFO,
1, 0,
sizeof(H265RawSEI3DReferenceDisplaysInfo),
SEI_MESSAGE_RW(h265, sei_3d_reference_displays_info),
},
SEI_MESSAGE_TYPE_END
};

16
libavcodec/cbs_h265.h
View file

@ -720,6 +720,22 @@ typedef struct H265RawSEIAlphaChannelInfo {
uint8_t alpha_channel_clip_type_flag;
} H265RawSEIAlphaChannelInfo;
typedef struct H265RawSEI3DReferenceDisplaysInfo {
uint8_t prec_ref_display_width;
uint8_t ref_viewing_distance_flag;
uint8_t prec_ref_viewing_dist;
uint8_t num_ref_displays_minus1;
uint8_t left_view_id[31];
uint8_t right_view_id[31];
uint8_t exponent_ref_display_width[31];
uint8_t mantissa_ref_display_width[31];
uint8_t exponent_ref_viewing_distance[31];
uint8_t mantissa_ref_viewing_distance[31];
uint8_t additional_shift_present_flag[31];
uint16_t num_sample_shift_plus512[31];
uint8_t three_dimensional_reference_displays_extension_flag;
} H265RawSEI3DReferenceDisplaysInfo;
typedef struct H265RawSEI {
H265RawNALUnitHeader nal_unit_header;
SEIRawMessageList message_list;

42
libavcodec/cbs_h265_syntax_template.c
View file

@ -2284,6 +2284,48 @@ SEI_FUNC(sei_alpha_channel_info, (CodedBitstreamContext *ctx, RWContext *rw,
return 0;
}
SEI_FUNC(sei_3d_reference_displays_info, (CodedBitstreamContext *ctx, RWContext *rw,
H265RawSEI3DReferenceDisplaysInfo *current,
SEIMessageState *sei))
{
int length;
int err, i;
HEADER("Three Dimensional Reference Displays Information");
ue(prec_ref_display_width, 0, 31);
flag(ref_viewing_distance_flag);
if (current->ref_viewing_distance_flag)
ue(prec_ref_viewing_dist, 0, 31);
ue(num_ref_displays_minus1, 0, 31);
for (i = 0; i <= current->num_ref_displays_minus1; i++) {
ues(left_view_id[i], 0, UINT8_MAX, 1, i);
ues(right_view_id[i], 0, UINT8_MAX, 1, i);
us(6, exponent_ref_display_width[i], 0, 62, 1, i);
if (!current->exponent_ref_display_width[i])
length = FFMAX(0, (int)current->prec_ref_display_width - 30);
else
length = FFMAX(0, (int)current->exponent_ref_display_width[i] +
(int)current->prec_ref_display_width - 31);
ubs(length, mantissa_ref_display_width[i], 1, i);
if (current->ref_viewing_distance_flag) {
us(6, exponent_ref_viewing_distance[i], 0, 62, 1, i);
if (!current->exponent_ref_viewing_distance[i])
length = FFMAX(0, (int)current->prec_ref_viewing_dist - 30);
else
length = FFMAX(0, (int)current->exponent_ref_viewing_distance[i] +
(int)current->prec_ref_viewing_dist - 31);
ubs(length, mantissa_ref_viewing_distance[i], 1, i);
}
flags(additional_shift_present_flag[i], 1, i);
if (current->additional_shift_present_flag[i])
us(10, num_sample_shift_plus512[i], 0, 1023, 1, i);
}
flag(three_dimensional_reference_displays_extension_flag);
return 0;
}
static int FUNC(sei)(CodedBitstreamContext *ctx, RWContext *rw,
H265RawSEI *current, int prefix)
{