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63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package prores
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// https://wiki.multimedia.cx/index.php/Apple_ProRes
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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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func init() {
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interp.RegisterFormat(
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format.Prores_Frame,
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&decode.Format{
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Description: "Apple ProRes frame",
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DecodeFn: decodeProResFrame,
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})
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}
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func decodeProResFrame(d *decode.D) any {
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var size int64
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d.FieldStruct("container", func(d *decode.D) {
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size = int64(d.FieldU32("size"))
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d.FieldUTF8("type", 4, d.StrAssert("icpf"))
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})
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d.FramedFn((size-8)*8, func(d *decode.D) {
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d.FieldStruct("header", func(d *decode.D) {
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d.FieldU16("hdr_size")
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d.FieldU16("version")
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d.FieldUTF8("creator_id", 4)
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d.FieldU16("width")
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d.FieldU16("height")
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d.FieldStruct("frame_flags", func(d *decode.D) {
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d.FieldU2("chrominance_factor", scalar.UintMapSymStr{
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2: "422",
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3: "444",
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})
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d.FieldU2("unused0")
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d.FieldU2("frame_type", scalar.UintMapSymStr{
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0: "progressive",
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1: "interlaced_top_first",
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2: "interlaced_bottom_first",
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})
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d.FieldU2("unused1")
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})
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// TODO: more mappings
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d.FieldU8("reserved1")
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d.FieldU8("primaries")
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d.FieldU8("transf_func")
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d.FieldU8("color_matrix")
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d.FieldU4("src_pix_fmt")
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d.FieldU4("alpha_info")
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d.FieldU8("reserved2")
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d.FieldU8("q_mat_flags")
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d.FieldRawLen("q_mat_luma", 64*8)
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d.FieldRawLen("q_mat_chroma", 64*8)
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})
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d.FieldRawLen("picture_data", d.BitsLeft())
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})
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return nil
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}
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