| /* |
| * 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 |
| */ |
| |
| /** |
| * @file |
| * H.264 parameter set handling |
| */ |
| |
| #ifndef AVCODEC_H264_PS_H |
| #define AVCODEC_H264_PS_H |
| |
| #include <stdint.h> |
| |
| #include "libavutil/buffer.h" |
| #include "libavutil/pixfmt.h" |
| #include "libavutil/rational.h" |
| |
| #include "avcodec.h" |
| #include "get_bits.h" |
| #include "h264.h" |
| |
| #define MAX_SPS_COUNT 32 |
| #define MAX_PPS_COUNT 256 |
| #define MAX_LOG2_MAX_FRAME_NUM (12 + 4) |
| |
| /** |
| * Sequence parameter set |
| */ |
| typedef struct SPS { |
| unsigned int sps_id; |
| int profile_idc; |
| int level_idc; |
| int chroma_format_idc; |
| int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag |
| int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4 |
| int poc_type; ///< pic_order_cnt_type |
| int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4 |
| int delta_pic_order_always_zero_flag; |
| int offset_for_non_ref_pic; |
| int offset_for_top_to_bottom_field; |
| int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle |
| int ref_frame_count; ///< num_ref_frames |
| int gaps_in_frame_num_allowed_flag; |
| int mb_width; ///< pic_width_in_mbs_minus1 + 1 |
| ///< (pic_height_in_map_units_minus1 + 1) * (2 - frame_mbs_only_flag) |
| int mb_height; |
| int frame_mbs_only_flag; |
| int mb_aff; ///< mb_adaptive_frame_field_flag |
| int direct_8x8_inference_flag; |
| int crop; ///< frame_cropping_flag |
| |
| /* those 4 are already in luma samples */ |
| unsigned int crop_left; ///< frame_cropping_rect_left_offset |
| unsigned int crop_right; ///< frame_cropping_rect_right_offset |
| unsigned int crop_top; ///< frame_cropping_rect_top_offset |
| unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset |
| int vui_parameters_present_flag; |
| AVRational sar; |
| int video_signal_type_present_flag; |
| int full_range; |
| int colour_description_present_flag; |
| enum AVColorPrimaries color_primaries; |
| enum AVColorTransferCharacteristic color_trc; |
| enum AVColorSpace colorspace; |
| int timing_info_present_flag; |
| uint32_t num_units_in_tick; |
| uint32_t time_scale; |
| int fixed_frame_rate_flag; |
| int32_t offset_for_ref_frame[256]; |
| int bitstream_restriction_flag; |
| int num_reorder_frames; |
| int scaling_matrix_present; |
| uint8_t scaling_matrix4[6][16]; |
| uint8_t scaling_matrix8[6][64]; |
| int nal_hrd_parameters_present_flag; |
| int vcl_hrd_parameters_present_flag; |
| int pic_struct_present_flag; |
| int time_offset_length; |
| int cpb_cnt; ///< See H.264 E.1.2 |
| int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1 |
| int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1 |
| int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1 |
| int bit_depth_luma; ///< bit_depth_luma_minus8 + 8 |
| int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8 |
| int residual_color_transform_flag; ///< residual_colour_transform_flag |
| int constraint_set_flags; ///< constraint_set[0-3]_flag |
| uint8_t data[4096]; |
| size_t data_size; |
| } SPS; |
| |
| /** |
| * Picture parameter set |
| */ |
| typedef struct PPS { |
| unsigned int sps_id; |
| int cabac; ///< entropy_coding_mode_flag |
| int pic_order_present; ///< pic_order_present_flag |
| int slice_group_count; ///< num_slice_groups_minus1 + 1 |
| int mb_slice_group_map_type; |
| unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1 |
| int weighted_pred; ///< weighted_pred_flag |
| int weighted_bipred_idc; |
| int init_qp; ///< pic_init_qp_minus26 + 26 |
| int init_qs; ///< pic_init_qs_minus26 + 26 |
| int chroma_qp_index_offset[2]; |
| int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag |
| int constrained_intra_pred; ///< constrained_intra_pred_flag |
| int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag |
| int transform_8x8_mode; ///< transform_8x8_mode_flag |
| uint8_t scaling_matrix4[6][16]; |
| uint8_t scaling_matrix8[6][64]; |
| uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table |
| int chroma_qp_diff; |
| uint8_t data[4096]; |
| size_t data_size; |
| |
| uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; |
| uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64]; |
| uint32_t(*dequant4_coeff[6])[16]; |
| uint32_t(*dequant8_coeff[6])[64]; |
| } PPS; |
| |
| typedef struct H264ParamSets { |
| AVBufferRef *sps_list[MAX_SPS_COUNT]; |
| AVBufferRef *pps_list[MAX_PPS_COUNT]; |
| |
| AVBufferRef *pps_ref; |
| AVBufferRef *sps_ref; |
| /* currently active parameters sets */ |
| const PPS *pps; |
| const SPS *sps; |
| } H264ParamSets; |
| |
| /** |
| * Decode SPS |
| */ |
| int ff_h264_decode_seq_parameter_set(GetBitContext *gb, AVCodecContext *avctx, |
| H264ParamSets *ps, int ignore_truncation); |
| |
| /** |
| * Decode PPS |
| */ |
| int ff_h264_decode_picture_parameter_set(GetBitContext *gb, AVCodecContext *avctx, |
| H264ParamSets *ps, int bit_length); |
| |
| /** |
| * Uninit H264 param sets structure. |
| */ |
| void ff_h264_ps_uninit(H264ParamSets *ps); |
| |
| #endif /* AVCODEC_H264_PS_H */ |
