/* * 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_MPEG2_H #define AVCODEC_CBS_MPEG2_H #include #include #include "libavutil/buffer.h" enum { MPEG2_START_PICTURE = 0x00, MPEG2_START_SLICE_MIN = 0x01, MPEG2_START_SLICE_MAX = 0xaf, MPEG2_START_USER_DATA = 0xb2, MPEG2_START_SEQUENCE_HEADER = 0xb3, MPEG2_START_SEQUENCE_ERROR = 0xb4, MPEG2_START_EXTENSION = 0xb5, MPEG2_START_SEQUENCE_END = 0xb7, MPEG2_START_GROUP = 0xb8, }; #define MPEG2_START_IS_SLICE(type) \ ((type) >= MPEG2_START_SLICE_MIN && \ (type) <= MPEG2_START_SLICE_MAX) enum { MPEG2_EXTENSION_SEQUENCE = 0x1, MPEG2_EXTENSION_SEQUENCE_DISPLAY = 0x2, MPEG2_EXTENSION_QUANT_MATRIX = 0x3, MPEG2_EXTENSION_COPYRIGHT = 0x4, MPEG2_EXTENSION_SEQUENCE_SCALABLE = 0x5, MPEG2_EXTENSION_PICTURE_DISPLAY = 0x7, MPEG2_EXTENSION_PICTURE_CODING = 0x8, MPEG2_EXTENSION_PICTURE_SPATIAL_SCALABLE = 0x9, MPEG2_EXTENSION_PICTURE_TEMPORAL_SCALABLE = 0xa, MPEG2_EXTENSION_CAMERA_PARAMETERS = 0xb, MPEG2_EXTENSION_ITU_T = 0xc, }; typedef struct MPEG2RawSequenceHeader { uint8_t sequence_header_code; uint16_t horizontal_size_value; uint16_t vertical_size_value; uint8_t aspect_ratio_information; uint8_t frame_rate_code; uint32_t bit_rate_value; uint16_t vbv_buffer_size_value; uint8_t constrained_parameters_flag; uint8_t load_intra_quantiser_matrix; uint8_t intra_quantiser_matrix[64]; uint8_t load_non_intra_quantiser_matrix; uint8_t non_intra_quantiser_matrix[64]; } MPEG2RawSequenceHeader; typedef struct MPEG2RawUserData { uint8_t user_data_start_code; uint8_t *user_data; size_t user_data_length; AVBufferRef *user_data_ref; } MPEG2RawUserData; typedef struct MPEG2RawSequenceExtension { uint8_t profile_and_level_indication; uint8_t progressive_sequence; uint8_t chroma_format; uint8_t horizontal_size_extension; uint8_t vertical_size_extension; uint16_t bit_rate_extension; uint8_t vbv_buffer_size_extension; uint8_t low_delay; uint8_t frame_rate_extension_n; uint8_t frame_rate_extension_d; } MPEG2RawSequenceExtension; typedef struct MPEG2RawSequenceDisplayExtension { uint8_t video_format; uint8_t colour_description; uint8_t colour_primaries; uint8_t transfer_characteristics; uint8_t matrix_coefficients; uint16_t display_horizontal_size; uint16_t display_vertical_size; } MPEG2RawSequenceDisplayExtension; typedef struct MPEG2RawGroupOfPicturesHeader { uint8_t group_start_code; uint32_t time_code; uint8_t closed_gop; uint8_t broken_link; } MPEG2RawGroupOfPicturesHeader; typedef struct MPEG2RawPictureHeader { uint8_t picture_start_code; uint16_t temporal_reference; uint8_t picture_coding_type; uint16_t vbv_delay; uint8_t full_pel_forward_vector; uint8_t forward_f_code; uint8_t full_pel_backward_vector; uint8_t backward_f_code; uint8_t extra_bit_picture; } MPEG2RawPictureHeader; typedef struct MPEG2RawPictureCodingExtension { uint8_t f_code[2][2]; uint8_t intra_dc_precision; uint8_t picture_structure; uint8_t top_field_first; uint8_t frame_pred_frame_dct; uint8_t concealment_motion_vectors; uint8_t q_scale_type; uint8_t intra_vlc_format; uint8_t alternate_scan; uint8_t repeat_first_field; uint8_t chroma_420_type; uint8_t progressive_frame; uint8_t composite_display_flag; uint8_t v_axis; uint8_t field_sequence; uint8_t sub_carrier; uint8_t burst_amplitude; uint8_t sub_carrier_phase; } MPEG2RawPictureCodingExtension; typedef struct MPEG2RawQuantMatrixExtension { uint8_t load_intra_quantiser_matrix; uint8_t intra_quantiser_matrix[64]; uint8_t load_non_intra_quantiser_matrix; uint8_t non_intra_quantiser_matrix[64]; uint8_t load_chroma_intra_quantiser_matrix; uint8_t chroma_intra_quantiser_matrix[64]; uint8_t load_chroma_non_intra_quantiser_matrix; uint8_t chroma_non_intra_quantiser_matrix[64]; } MPEG2RawQuantMatrixExtension; typedef struct MPEG2RawPictureDisplayExtension { uint16_t frame_centre_horizontal_offset[3]; uint16_t frame_centre_vertical_offset[3]; } MPEG2RawPictureDisplayExtension; typedef struct MPEG2RawExtensionData { uint8_t extension_start_code; uint8_t extension_start_code_identifier; union { MPEG2RawSequenceExtension sequence; MPEG2RawSequenceDisplayExtension sequence_display; MPEG2RawQuantMatrixExtension quant_matrix; MPEG2RawPictureCodingExtension picture_coding; MPEG2RawPictureDisplayExtension picture_display; } data; } MPEG2RawExtensionData; typedef struct MPEG2RawSliceHeader { uint8_t slice_vertical_position; uint8_t slice_vertical_position_extension; uint8_t priority_breakpoint; uint8_t quantiser_scale_code; uint8_t slice_extension_flag; uint8_t intra_slice; uint8_t slice_picture_id_enable; uint8_t slice_picture_id; uint8_t extra_bit_slice; size_t extra_information_length; uint8_t *extra_information; AVBufferRef *extra_information_ref; } MPEG2RawSliceHeader; typedef struct MPEG2RawSlice { MPEG2RawSliceHeader header; uint8_t *data; size_t data_size; int data_bit_start; AVBufferRef *data_ref; } MPEG2RawSlice; typedef struct CodedBitstreamMPEG2Context { // Elements stored in headers which are required for other decoding. uint16_t horizontal_size; uint16_t vertical_size; uint8_t scalable; uint8_t scalable_mode; uint8_t progressive_sequence; uint8_t number_of_frame_centre_offsets; // Write buffer. uint8_t *write_buffer; size_t write_buffer_size; } CodedBitstreamMPEG2Context; #endif /* AVCODEC_CBS_MPEG2_H */