mirror of https://bitbucket.org/ausocean/av.git
92 lines
2.2 KiB
Go
92 lines
2.2 KiB
Go
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package h264dec
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// NALU types, as defined in table 7-1 in specifications.
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const (
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naluTypeUnspecified = iota
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NALTypeNonIDR
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naluTypeSlicePartA
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naluTypeSlicePartB
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naluTypeSlicePartC
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NALTypeIDR
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NALTypeSEI
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NALTypeSPS
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NALTypePPS
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NALTypeAccessUnitDelimiter
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naluTypeEndOfSequence
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naluTypeEndOfStream
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naluTypeFillerData
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naluTypeSPSExtension
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naluTypePrefixNALU
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naluTypeSubsetSPS
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naluTypeDepthParamSet
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naluTypeSliceLayerExtRBSP = 20
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naluTypeSliceLayerExtRBSP2 = 21
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)
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var (
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// Refer to ITU-T H.264 4/10/2017
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// Specifieds the RBSP structure in the NAL unit
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NALUnitType = map[int]string{
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0: "unspecified",
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// slice_layer_without_partitioning_rbsp
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1: "coded slice of non-IDR picture",
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// slice_data_partition_a_layer_rbsp
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2: "coded slice data partition a",
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// slice_data_partition_b_layer_rbsp
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3: "coded slice data partition b",
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// slice_data_partition_c_layer_rbsp
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4: "coded slice data partition c",
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// slice_layer_without_partitioning_rbsp
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5: "coded IDR slice of picture",
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// sei_rbsp
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6: "sei suppl. enhancem. info",
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// seq_parameter_set_rbsp
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7: "sequence parameter set",
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// pic_parameter_set_rbsp
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8: "picture parameter set",
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// access_unit_delimiter_rbsp
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9: "access unit delimiter",
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// end_of_seq_rbsp
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10: "end of sequence",
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// end_of_stream_rbsp
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11: "end of stream",
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// filler_data_rbsp
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12: "filler data",
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// seq_parameter_set_extension_rbsp
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13: "sequence parameter set extensions",
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// prefix_nal_unit_rbsp
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14: "prefix NAL unit",
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// subset sequence parameter set
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15: "subset SPS",
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// depth_parameter_set_rbsp
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16: "depth parameter set",
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// 17, 18 are reserved
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17: "reserved",
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18: "reserved",
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// slice_layer_without_partitioning_rbsp
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19: "coded slice of aux coded pic w/o partit.",
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// slice_layer_extension_rbsp
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20: "coded slice extension",
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// slice_layer_extension_rbsp
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21: "slice ext. for depth of view or 3Davc view comp.",
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22: "reserved",
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23: "reserved",
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// 24 - 31 undefined
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}
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// ITU-T H.265 Section 7.4.1 nal_ref_idc
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NALRefIDC = map[int]string{
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0: "only nal_unit_type 6, 9, 10, 11, or 12",
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1: "anything",
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2: "anything",
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3: "anything",
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4: "anything",
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}
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)
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func rbspBytes(frame []byte) []byte {
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if len(frame) > 8 {
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return frame[8:]
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}
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return frame
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}
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