mirror of
https://github.com/wader/fq.git
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94 lines
3.1 KiB
Go
94 lines
3.1 KiB
Go
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package mpeg
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// https://www.itu.int/rec/T-REC-H.265
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import (
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"github.com/wader/fq/format"
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"github.com/wader/fq/format/registry"
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"github.com/wader/fq/pkg/decode"
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)
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func init() {
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registry.MustRegister(decode.Format{
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Name: format.HEVC_PPS,
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Description: "H.265/HEVC Picture Parameter Set",
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DecodeFn: hevcPPSDecode,
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})
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}
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// H.265 page 36
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func hevcPPSDecode(d *decode.D, in interface{}) interface{} {
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d.FieldUFn("pps_pic_parameter_set_id", uEV)
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d.FieldUFn("pps_seq_parameter_set_id", uEV)
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d.FieldBool("dependent_slice_segments_enabled_flag")
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d.FieldBool("output_flag_present_flag")
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d.FieldU3("num_extra_slice_header_bits")
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d.FieldBool("sign_data_hiding_enabled_flag")
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d.FieldBool("cabac_init_present_flag")
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d.FieldUFn("num_ref_idx_l0_default_active_minus1", uEV)
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d.FieldUFn("num_ref_idx_l1_default_active_minus1", uEV)
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d.FieldSFn("init_qp_minus26", sEV)
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d.FieldBool("constrained_intra_pred_flag")
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d.FieldBool("transform_skip_enabled_flag")
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cuQpDeltaEnabledFlag := d.FieldBool("cu_qp_delta_enabled_flag")
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if cuQpDeltaEnabledFlag {
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d.FieldUFn("diff_cu_qp_delta_depth", uEV)
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}
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d.FieldSFn("pps_cb_qp_offset", sEV)
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d.FieldSFn("pps_cr_qp_offset", sEV)
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d.FieldBool("pps_slice_chroma_qp_offsets_present_flag")
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d.FieldBool("weighted_pred_flag")
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d.FieldBool("weighted_bipred_flag")
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d.FieldBool("transquant_bypass_enabled_flag")
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tilesEnabledFlag := d.FieldBool("tiles_enabled_flag")
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d.FieldBool("entropy_coding_sync_enabled_flag")
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if tilesEnabledFlag {
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numTileColumnsMinus1 := d.FieldUFn("num_tile_columns_minus1", uEV)
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numTileRowsMinus1 := d.FieldUFn("num_tile_rows_minus1", uEV)
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uniformSpacingFlag := d.FieldBool("uniform_spacing_flag")
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if !uniformSpacingFlag {
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d.FieldArray("column_widths", func(d *decode.D) {
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for i := uint64(0); i < numTileColumnsMinus1; i++ {
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d.FieldUFn("column_width", uEV)
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}
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})
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d.FieldArray("row_heights", func(d *decode.D) {
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for i := uint64(0); i < numTileRowsMinus1; i++ {
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d.FieldUFn("row_height", uEV)
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}
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})
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}
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d.FieldBool("loop_filter_across_tiles_enabled_flag")
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}
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d.FieldBool("pps_loop_filter_across_slices_enabled_flag")
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deblockingFilterControlPresentFlag := d.FieldBool("deblocking_filter_control_present_flag")
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if deblockingFilterControlPresentFlag {
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d.FieldBool("deblocking_filter_override_enabled_flag")
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ppsDeblockingFilterDisabledFlag := d.FieldBool("pps_deblocking_filter_disabled_flag")
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if !ppsDeblockingFilterDisabledFlag {
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d.FieldSFn("pps_beta_offset_div2", sEV)
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d.FieldSFn("pps_tc_offset_div2", sEV)
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}
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}
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ppsScalingListDataPresentFlag := d.FieldBool("pps_scaling_list_data_present_flag")
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if ppsScalingListDataPresentFlag {
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// TODO: scaling_list_data
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return nil
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}
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d.FieldBool("lists_modification_present_flag")
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d.FieldUFn("log2_parallel_merge_level_minus2", uEV)
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d.FieldBool("slice_segment_header_extension_present_flag")
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ppsExtensionPresentFlag := d.FieldBool("pps_extension_present_flag")
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if ppsExtensionPresentFlag {
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d.FieldBool("pps_range_extension_flag")
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d.FieldBool("pps_multilayer_extension_flag")
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d.FieldBool("pps_3d_extension_flag")
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d.FieldBool("pps_scc_extension_flag")
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d.FieldU4("pps_extension_4bits")
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}
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// TODO: extensions
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return nil
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}
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