diff options
author | Mark Thompson <sw@jkqxz.net> | 2017-05-14 18:18:25 +0300 |
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committer | Mark Thompson <sw@jkqxz.net> | 2017-10-17 22:56:29 +0300 |
commit | b4c915f4b3e15c3e787e319b961e4389762f6309 (patch) | |
tree | f5291743bc8e77250b0e45b9ab570612516850aa /libavcodec/cbs_h264.h | |
parent | 6734eef6b8b464139fdc140ec9bc9e8d74173869 (diff) |
lavc: Add coded bitstream read/write support for H.264
(cherry picked from commit acf06f45441be24c5cbae0920579cd69427326a1)
(cherry picked from commit 768eb9182e94a94bc2ef46f565a0dac7afef3b57)
(cherry picked from commit e7f64191b27bcf37cbf7006606f0f439c6cdc24f)
Diffstat (limited to 'libavcodec/cbs_h264.h')
-rw-r--r-- | libavcodec/cbs_h264.h | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/libavcodec/cbs_h264.h b/libavcodec/cbs_h264.h new file mode 100644 index 0000000000..ab7dfd855f --- /dev/null +++ b/libavcodec/cbs_h264.h @@ -0,0 +1,427 @@ +/* + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_CBS_H264_H +#define AVCODEC_CBS_H264_H + +#include <stddef.h> +#include <stdint.h> + +#include "cbs_h2645.h" +#include "h264.h" + + +enum { + // This limit is arbitrary - it is sufficient for one message of each + // type plus some repeats, and will therefore easily cover all sane + // streams. However, it is possible to make technically-valid streams + // for which it will fail (for example, by including a large number of + // user-data-unregistered messages). + H264_MAX_SEI_PAYLOADS = 64, +}; + + +typedef struct H264RawNALUnitHeader { + uint8_t forbidden_zero_bit; + uint8_t nal_ref_idc; + uint8_t nal_unit_type; + + uint8_t svc_extension_flag; + uint8_t avc_3d_extension_flag; +} H264RawNALUnitHeader; + +typedef struct H264RawScalingList { + int8_t delta_scale[64]; +} H264RawScalingList; + +typedef struct H264RawHRD { + uint8_t cpb_cnt_minus1; + uint8_t bit_rate_scale; + uint8_t cpb_size_scale; + + uint32_t bit_rate_value_minus1[H264_MAX_CPB_CNT]; + uint32_t cpb_size_value_minus1[H264_MAX_CPB_CNT]; + uint8_t cbr_flag[H264_MAX_CPB_CNT]; + + uint8_t initial_cpb_removal_delay_length_minus1; + uint8_t cpb_removal_delay_length_minus1; + uint8_t dpb_output_delay_length_minus1; + uint8_t time_offset_length; +} H264RawHRD; + +typedef struct H264RawVUI { + uint8_t aspect_ratio_info_present_flag; + uint8_t aspect_ratio_idc; + uint16_t sar_width; + uint16_t sar_height; + + uint8_t overscan_info_present_flag; + uint8_t overscan_appropriate_flag; + + uint8_t video_signal_type_present_flag; + uint8_t video_format; + uint8_t video_full_range_flag; + uint8_t colour_description_present_flag; + uint8_t colour_primaries; + uint8_t transfer_characteristics; + uint8_t matrix_coefficients; + + uint8_t chroma_loc_info_present_flag; + uint8_t chroma_sample_loc_type_top_field; + uint8_t chroma_sample_loc_type_bottom_field; + + uint8_t timing_info_present_flag; + uint32_t num_units_in_tick; + uint32_t time_scale; + uint8_t fixed_frame_rate_flag; + + uint8_t nal_hrd_parameters_present_flag; + H264RawHRD nal_hrd_parameters; + uint8_t vcl_hrd_parameters_present_flag; + H264RawHRD vcl_hrd_parameters; + uint8_t low_delay_hrd_flag; + + uint8_t pic_struct_present_flag; + + uint8_t bitstream_restriction_flag; + uint8_t motion_vectors_over_pic_boundaries_flag; + uint8_t max_bytes_per_pic_denom; + uint8_t max_bits_per_mb_denom; + uint8_t log2_max_mv_length_horizontal; + uint8_t log2_max_mv_length_vertical; + uint8_t max_num_reorder_frames; + uint8_t max_dec_frame_buffering; +} H264RawVUI; + +typedef struct H264RawSPS { + H264RawNALUnitHeader nal_unit_header; + + uint8_t profile_idc; + uint8_t constraint_set0_flag; + uint8_t constraint_set1_flag; + uint8_t constraint_set2_flag; + uint8_t constraint_set3_flag; + uint8_t constraint_set4_flag; + uint8_t constraint_set5_flag; + uint8_t reserved_zero_2bits; + uint8_t level_idc; + + uint8_t seq_parameter_set_id; + + uint8_t chroma_format_idc; + uint8_t separate_colour_plane_flag; + uint8_t bit_depth_luma_minus8; + uint8_t bit_depth_chroma_minus8; + uint8_t qpprime_y_zero_transform_bypass_flag; + + uint8_t seq_scaling_matrix_present_flag; + uint8_t seq_scaling_list_present_flag[12]; + H264RawScalingList scaling_list_4x4[6]; + H264RawScalingList scaling_list_8x8[6]; + + uint8_t log2_max_frame_num_minus4; + uint8_t pic_order_cnt_type; + uint8_t log2_max_pic_order_cnt_lsb_minus4; + uint8_t delta_pic_order_always_zero_flag; + int32_t offset_for_non_ref_pic; + int32_t offset_for_top_to_bottom_field; + uint8_t num_ref_frames_in_pic_order_cnt_cycle; + int32_t offset_for_ref_frame[256]; + + uint8_t max_num_ref_frames; + uint8_t gaps_in_frame_num_allowed_flag; + + uint16_t pic_width_in_mbs_minus1; + uint16_t pic_height_in_map_units_minus1; + + uint8_t frame_mbs_only_flag; + uint8_t mb_adaptive_frame_field_flag; + uint8_t direct_8x8_inference_flag; + + uint8_t frame_cropping_flag; + uint16_t frame_crop_left_offset; + uint16_t frame_crop_right_offset; + uint16_t frame_crop_top_offset; + uint16_t frame_crop_bottom_offset; + + uint8_t vui_parameters_present_flag; + H264RawVUI vui; +} H264RawSPS; + +typedef struct H264RawSPSExtension { + H264RawNALUnitHeader nal_unit_header; + + uint8_t seq_parameter_set_id; + + uint8_t aux_format_idc; + uint8_t bit_depth_aux_minus8; + uint8_t alpha_incr_flag; + uint16_t alpha_opaque_value; + uint16_t alpha_transparent_value; + + uint8_t additional_extension_flag; +} H264RawSPSExtension; + +typedef struct H264RawPPS { + H264RawNALUnitHeader nal_unit_header; + + uint8_t pic_parameter_set_id; + uint8_t seq_parameter_set_id; + + uint8_t entropy_coding_mode_flag; + uint8_t bottom_field_pic_order_in_frame_present_flag; + + uint8_t num_slice_groups_minus1; + uint8_t slice_group_map_type; + uint16_t run_length_minus1[H264_MAX_SLICE_GROUPS]; + uint16_t top_left[H264_MAX_SLICE_GROUPS]; + uint16_t bottom_right[H264_MAX_SLICE_GROUPS]; + uint8_t slice_group_change_direction_flag; + uint16_t slice_group_change_rate_minus1; + uint16_t pic_size_in_map_units_minus1; + uint8_t slice_group_id[H264_MAX_MB_PIC_SIZE]; + + uint8_t num_ref_idx_l0_default_active_minus1; + uint8_t num_ref_idx_l1_default_active_minus1; + + uint8_t weighted_pred_flag; + uint8_t weighted_bipred_idc; + + int8_t pic_init_qp_minus26; + int8_t pic_init_qs_minus26; + int8_t chroma_qp_index_offset; + + uint8_t deblocking_filter_control_present_flag; + uint8_t constrained_intra_pred_flag; + + uint8_t more_rbsp_data; + + uint8_t redundant_pic_cnt_present_flag; + uint8_t transform_8x8_mode_flag; + + uint8_t pic_scaling_matrix_present_flag; + uint8_t pic_scaling_list_present_flag[12]; + H264RawScalingList scaling_list_4x4[6]; + H264RawScalingList scaling_list_8x8[6]; + + int8_t second_chroma_qp_index_offset; +} H264RawPPS; + +typedef struct H264RawAUD { + H264RawNALUnitHeader nal_unit_header; + + uint8_t primary_pic_type; +} H264RawAUD; + +typedef struct H264RawSEIBufferingPeriod { + uint8_t seq_parameter_set_id; + struct { + uint32_t initial_cpb_removal_delay[H264_MAX_CPB_CNT]; + uint32_t initial_cpb_removal_delay_offset[H264_MAX_CPB_CNT]; + } nal, vcl; +} H264RawSEIBufferingPeriod; + +typedef struct H264RawSEIPicTimestamp { + uint8_t ct_type; + uint8_t nuit_field_based_flag; + uint8_t counting_type; + uint8_t full_timestamp_flag; + uint8_t discontinuity_flag; + uint8_t cnt_dropped_flag; + uint8_t n_frames; + uint8_t seconds_flag; + uint8_t seconds_value; + uint8_t minutes_flag; + uint8_t minutes_value; + uint8_t hours_flag; + uint8_t hours_value; + uint32_t time_offset; +} H264RawSEIPicTimestamp; + +typedef struct H264RawSEIPicTiming { + uint32_t cpb_removal_delay; + uint32_t dpb_output_delay; + uint8_t pic_struct; + uint8_t clock_timestamp_flag[3]; + H264RawSEIPicTimestamp timestamp[3]; +} H264RawSEIPicTiming; + +typedef struct H264RawSEIUserDataRegistered { + uint8_t itu_t_t35_country_code; + uint8_t itu_t_t35_country_code_extension_byte; + uint8_t *data; + size_t data_length; +} H264RawSEIUserDataRegistered; + +typedef struct H264RawSEIUserDataUnregistered { + uint8_t uuid_iso_iec_11578[16]; + uint8_t *data; + size_t data_length; +} H264RawSEIUserDataUnregistered; + +typedef struct H264RawSEIRecoveryPoint { + uint16_t recovery_frame_cnt; + uint8_t exact_match_flag; + uint8_t broken_link_flag; + uint8_t changing_slice_group_idc; +} H264RawSEIRecoveryPoint; + +typedef struct H264RawSEIDisplayOrientation { + uint8_t display_orientation_cancel_flag; + uint8_t hor_flip; + uint8_t ver_flip; + uint16_t anticlockwise_rotation; + uint16_t display_orientation_repetition_period; + uint8_t display_orientation_extension_flag; +} H264RawSEIDisplayOrientation; + +typedef struct H264RawSEIPayload { + uint32_t payload_type; + uint32_t payload_size; + union { + H264RawSEIBufferingPeriod buffering_period; + H264RawSEIPicTiming pic_timing; + // H264RawSEIFiller filler -> no fields. + H264RawSEIUserDataRegistered user_data_registered; + H264RawSEIUserDataUnregistered user_data_unregistered; + H264RawSEIRecoveryPoint recovery_point; + H264RawSEIDisplayOrientation display_orientation; + struct { + uint8_t *data; + size_t data_length; + } other; + } payload; +} H264RawSEIPayload; + +typedef struct H264RawSEI { + H264RawNALUnitHeader nal_unit_header; + + H264RawSEIPayload payload[H264_MAX_SEI_PAYLOADS]; + uint8_t payload_count; +} H264RawSEI; + +typedef struct H264RawSliceHeader { + H264RawNALUnitHeader nal_unit_header; + + uint32_t first_mb_in_slice; + uint8_t slice_type; + + uint8_t pic_parameter_set_id; + + uint8_t colour_plane_id; + + uint16_t frame_num; + uint8_t field_pic_flag; + uint8_t bottom_field_flag; + + uint16_t idr_pic_id; + + uint16_t pic_order_cnt_lsb; + int32_t delta_pic_order_cnt_bottom; + int32_t delta_pic_order_cnt[2]; + + uint8_t redundant_pic_cnt; + uint8_t direct_spatial_mv_pred_flag; + + uint8_t num_ref_idx_active_override_flag; + uint8_t num_ref_idx_l0_active_minus1; + uint8_t num_ref_idx_l1_active_minus1; + + uint8_t ref_pic_list_modification_flag_l0; + uint8_t ref_pic_list_modification_flag_l1; + struct { + uint8_t modification_of_pic_nums_idc; + int32_t abs_diff_pic_num_minus1; + uint8_t long_term_pic_num; + } rplm_l0[H264_MAX_RPLM_COUNT], rplm_l1[H264_MAX_RPLM_COUNT]; + + uint8_t luma_log2_weight_denom; + uint8_t chroma_log2_weight_denom; + + uint8_t luma_weight_l0_flag[H264_MAX_REFS]; + int8_t luma_weight_l0[H264_MAX_REFS]; + int8_t luma_offset_l0[H264_MAX_REFS]; + uint8_t chroma_weight_l0_flag[H264_MAX_REFS]; + int8_t chroma_weight_l0[H264_MAX_REFS][2]; + int8_t chroma_offset_l0[H264_MAX_REFS][2]; + + uint8_t luma_weight_l1_flag[H264_MAX_REFS]; + int8_t luma_weight_l1[H264_MAX_REFS]; + int8_t luma_offset_l1[H264_MAX_REFS]; + uint8_t chroma_weight_l1_flag[H264_MAX_REFS]; + int8_t chroma_weight_l1[H264_MAX_REFS][2]; + int8_t chroma_offset_l1[H264_MAX_REFS][2]; + + uint8_t no_output_of_prior_pics_flag; + uint8_t long_term_reference_flag; + + uint8_t adaptive_ref_pic_marking_mode_flag; + struct { + uint8_t memory_management_control_operation; + int32_t difference_of_pic_nums_minus1; + uint8_t long_term_pic_num; + uint8_t long_term_frame_idx; + uint8_t max_long_term_frame_idx_plus1; + } mmco[H264_MAX_MMCO_COUNT]; + + uint8_t cabac_init_idc; + + int8_t slice_qp_delta; + + uint8_t sp_for_switch_flag; + int8_t slice_qs_delta; + + uint8_t disable_deblocking_filter_idc; + int8_t slice_alpha_c0_offset_div2; + int8_t slice_beta_offset_div2; + + uint16_t slice_group_change_cycle; +} H264RawSliceHeader; + +typedef struct H264RawSlice { + H264RawSliceHeader header; + + uint8_t *data; + size_t data_size; + int data_bit_start; +} H264RawSlice; + + +typedef struct CodedBitstreamH264Context { + // Reader/writer context in common with the H.265 implementation. + CodedBitstreamH2645Context common; + + // All currently available parameter sets. These are updated when + // any parameter set NAL unit is read/written with this context. + H264RawSPS *sps[H264_MAX_SPS_COUNT]; + H264RawPPS *pps[H264_MAX_PPS_COUNT]; + + // The currently active parameter sets. These are updated when any + // NAL unit refers to the relevant parameter set. These pointers + // must also be present in the arrays above. + const H264RawSPS *active_sps; + const H264RawPPS *active_pps; + + // The NAL unit type of the most recent normal slice. This is required + // to be able to read/write auxiliary slices, because IdrPicFlag is + // otherwise unknown. + uint8_t last_slice_nal_unit_type; +} CodedBitstreamH264Context; + + +#endif /* AVCODEC_CBS_H264_H */ |