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67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
package mpeg
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import (
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"fq/format"
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"fq/format/registry"
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"fq/pkg/decode"
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)
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var hevcDCRNALFormat []*decode.Format
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func init() {
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registry.MustRegister(&decode.Format{
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Name: format.HEVC_DCR,
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Description: "H.265/HEVC Decoder Configuration Record",
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DecodeFn: hevcDcrDecode,
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Dependencies: []decode.Dependency{
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{Names: []string{format.HEVC_NALU}, Formats: &hevcDCRNALFormat},
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},
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})
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}
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func hevcDcrDecode(d *decode.D, in interface{}) interface{} {
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d.FieldU8("configuration_version")
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d.FieldU2("general_profile_space")
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d.FieldU1("general_tier_flag")
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d.FieldU5("general_profile_idc")
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d.FieldU32("general_profile_compatibility_flags")
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d.FieldU48("general_constraint_indicator_flags")
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d.FieldU8("general_level_idc")
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d.FieldU4("reserved0")
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d.FieldU12("min_spatial_segmentation_idc")
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d.FieldU6("reserved1")
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d.FieldU2("parallelism_type")
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d.FieldU6("reserved2")
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d.FieldU2("chroma_format_idc")
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d.FieldU5("reserved3")
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d.FieldU3("bit_depth_luma_minus8")
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d.FieldU5("reserved4")
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d.FieldU3("bit_depth_chroma_minus8")
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d.FieldU16("avg_frame_rate")
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d.FieldU2("constant_frame_rate")
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d.FieldU3("num_temporal_layers")
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d.FieldU1("temporal_id_nested")
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lengthSizeMinusOne := d.FieldU2("length_size_minus_one")
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numArrays := d.FieldU8("num_of_arrays")
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d.FieldArrayFn("arrays", func(d *decode.D) {
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for i := uint64(0); i < numArrays; i++ {
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d.FieldStructFn("array", func(d *decode.D) {
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d.FieldU1("array_completeness")
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d.FieldU1("reserved0")
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d.FieldStringMapFn("nal_unit_type", hevcNALNames, "Unknown", d.U6, decode.NumberDecimal)
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numNals := d.FieldU16("num_nalus")
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d.FieldArrayFn("nals", func(d *decode.D) {
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for i := uint64(0); i < numNals; i++ {
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d.FieldStructFn("nal", func(d *decode.D) {
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nalUnitLength := int64(d.FieldU16("nal_unit_length"))
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d.FieldDecodeLen("nal", nalUnitLength*8, hevcDCRNALFormat)
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})
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}
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})
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})
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}
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})
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return format.HevcDcrOut{LengthSize: lengthSizeMinusOne + 1}
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}
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