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150 lines
4.7 KiB
Go
150 lines
4.7 KiB
Go
package mpeg
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// ISO/IEC 14496-15 AVC file format, 5.3.3.1.2 Syntax
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// ISO_IEC_14496-10 AVC
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// TODO: use avcLevels
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import (
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"github.com/wader/fq/format"
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"github.com/wader/fq/pkg/decode"
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"github.com/wader/fq/pkg/interp"
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"github.com/wader/fq/pkg/scalar"
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)
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var avcDCRNALFormat decode.Group
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func init() {
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interp.RegisterFormat(decode.Format{
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Name: format.AVC_DCR,
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Description: "H.264/AVC Decoder Configuration Record",
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DecodeFn: avcDcrDecode,
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Dependencies: []decode.Dependency{
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{Names: []string{format.AVC_NALU}, Group: &avcDCRNALFormat},
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},
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})
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}
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var avcProfileNames = scalar.UToSymStr{
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// 66: "constrained_baseline_profile", // (CBP, 66 with constraint set 1)
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66: "baseline_profile",
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88: "extended_profile",
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77: "main_profile",
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100: "high_profile",
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//100: "Constrained High Profile", // (100 with constraint set 4 and 5)
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110: "high_10_profile",
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122: "high_422_profile",
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244: "high_444_predictive_profile",
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// 110: "High 10 Intra Profile", // (110 with constraint set 3)
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// 122: "High 4:2:2 Intra Profile", // (122 with constraint set 3)
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// 244: "High 4:4:4 Intra Profile", // (244 with constraint set 3)
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44: "cavlc_444_intra_profile",
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83: "scalable_baseline_profile",
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86: "scalable_high_profile",
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128: "stereo_high_profile",
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134: "mfc_high_profile",
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138: "multiview_depth_high_profile",
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139: "enhanced_multiview_depth_high_profile",
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}
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// TODO: 1b contraint flag 1?
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var avcLevelNames = scalar.UToSymStr{
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10: "1",
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//10: "1b"
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11: "1.1",
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12: "1.2",
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13: "1.3",
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20: "2",
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21: "2.1",
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22: "2.2",
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30: "3",
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31: "3.1",
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32: "3.2",
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40: "4",
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41: "4.1",
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42: "4.2",
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50: "5",
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51: "5.1",
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52: "5.2",
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60: "6",
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61: "6.1",
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62: "6.2",
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}
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// type avcLevel struct {
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// Name string
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// MaxMBPS uint64
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// MaxFS uint64
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// MaxDpbMbs uint64
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// MaxBR uint64
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// MaxCPB uint64
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// MaxVmvR uint64
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// MinCR uint64
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// MaxMvsPer2Mb uint64
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// }
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// TODO: 1b contraint flag 1?
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// var avcLevels = map[uint64]avcLevel{
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// 10: {"1", 1485, 99, 396, 64, 175, 64, 2, 0},
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// //10: {"1b", 1485, 99, 396, 128, 350, 64, 2, 0}, //
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// 11: {"1.1", 3000, 396, 900, 192, 500, 128, 2, 0},
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// 12: {"1.2", 6000, 396, 2376, 384, 1000, 128, 2, 0},
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// 13: {"1.3", 11880, 396, 2376, 768, 2000, 128, 2, 0},
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// 20: {"2", 11880, 396, 2376, 2000, 2000, 128, 2, 0},
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// 21: {"2.1", 19800, 792, 4752, 4000, 4000, 256, 2, 0},
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// 22: {"2.2", 20250, 1620, 8100, 4000, 4000, 256, 2, 0},
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// 30: {"3", 40500, 1620, 8100, 10000, 10000, 256, 2, 32},
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// 31: {"3.1", 108000, 3600, 18000, 14000, 14000, 512, 4, 16},
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// 32: {"3.2", 216000, 5120, 20480, 20000, 20000, 512, 4, 16},
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// 40: {"4", 245760, 8192, 32768, 20000, 25000, 512, 4, 16},
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// 41: {"4.1", 245760, 8192, 32768, 50000, 62500, 512, 2, 16},
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// 42: {"4.2", 522240, 8704, 34816, 50000, 62500, 512, 2, 16},
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// 50: {"5", 589824, 22080, 110400, 135000, 135000, 512, 2, 16},
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// 51: {"5.1", 983040, 36864, 184320, 240000, 240000, 512, 2, 16},
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// 52: {"5.2", 2073600, 36864, 184320, 240000, 240000, 512, 2, 16},
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// 60: {"6", 4177920, 139264, 696320, 240000, 240000, 8192, 2, 16},
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// 61: {"6.1", 8355840, 139264, 696320, 480000, 480000, 8192, 2, 16},
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// 62: {"6.2", 16711680, 139264, 696320, 800000, 800000, 8192, 2, 16},
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// }
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func avcDcrParameterSet(d *decode.D, numParamSets uint64) {
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for i := uint64(0); i < numParamSets; i++ {
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d.FieldStruct("set", func(d *decode.D) {
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paramSetLen := d.FieldU16("length")
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d.FieldFormatLen("nal", int64(paramSetLen)*8, avcDCRNALFormat, nil)
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})
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}
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}
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func avcDcrDecode(d *decode.D, _ any) any {
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d.FieldU8("configuration_version")
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d.FieldU8("profile_indication", avcProfileNames)
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d.FieldU8("profile_compatibility")
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d.FieldU8("level_indication", avcLevelNames)
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d.FieldU6("reserved0")
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lengthSize := d.FieldU2("length_size", scalar.ActualUAdd(1))
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d.FieldU3("reserved1")
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numSeqParamSets := d.FieldU5("num_of_sequence_parameter_sets")
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d.FieldArray("sequence_parameter_sets", func(d *decode.D) {
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avcDcrParameterSet(d, numSeqParamSets)
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})
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numPicParamSets := d.FieldU8("num_of_picture_parameter_sets")
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d.FieldArray("picture_parameter_sets", func(d *decode.D) {
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avcDcrParameterSet(d, numPicParamSets)
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})
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if d.BitsLeft() > 0 {
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d.FieldRawLen("data", d.BitsLeft())
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}
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// TODO:
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// Compatible extensions to this record will extend it and will not change the configuration version code. Readers
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// should be prepared to ignore unrecognized data beyond the definition of the data they understand (e.g. after
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// the parameter sets in this specification).
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// TODO: something wrong here, seen files with profileIdc = 100 with no bytes after picture_parameter_sets
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// https://github.com/FFmpeg/FFmpeg/blob/069d2b4a50a6eb2f925f36884e6b9bd9a1e54670/libavcodec/h264_ps.c#L333
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return format.AvcDcrOut{LengthSize: lengthSize}
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}
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