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/*
* 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_VP9_H
#define AVCODEC_CBS_VP9_H
#include <stddef.h>
#include <stdint.h>
#include "cbs.h"
// Miscellaneous constants (section 3).
enum {
VP9_REFS_PER_FRAME = 3,
VP9_MIN_TILE_WIDTH_B64 = 4,
VP9_MAX_TILE_WIDTH_B64 = 64,
VP9_NUM_REF_FRAMES = 8,
VP9_MAX_REF_FRAMES = 4,
VP9_MAX_SEGMENTS = 8,
VP9_SEG_LVL_MAX = 4,
};
// Frame types (section 7.2).
enum {
VP9_KEY_FRAME = 0,
VP9_NON_KEY_FRAME = 1,
};
// Frame sync bytes (section 7.2.1).
enum {
VP9_FRAME_SYNC_0 = 0x49,
VP9_FRAME_SYNC_1 = 0x83,
VP9_FRAME_SYNC_2 = 0x42,
};
// Color space values (section 7.2.2).
enum {
VP9_CS_UNKNOWN = 0,
VP9_CS_BT_601 = 1,
VP9_CS_BT_709 = 2,
VP9_CS_SMPTE_170 = 3,
VP9_CS_SMPTE_240 = 4,
VP9_CS_BT_2020 = 5,
VP9_CS_RESERVED = 6,
VP9_CS_RGB = 7,
};
// Reference frame types (section 7.4.12).
enum {
VP9_INTRA_FRAME = 0,
VP9_LAST_FRAME = 1,
VP9_GOLDEN_FRAME = 2,
VP9_ALTREF_FRAME = 3,
};
// Superframe properties (section B.3).
enum {
VP9_MAX_FRAMES_IN_SUPERFRAME = 8,
VP9_SUPERFRAME_MARKER = 6,
};
typedef struct VP9RawFrameHeader {
uint8_t frame_marker;
uint8_t profile_low_bit;
uint8_t profile_high_bit;
uint8_t show_existing_frame;
uint8_t frame_to_show_map_idx;
uint8_t frame_type;
uint8_t show_frame;
uint8_t error_resilient_mode;
// Color config.
uint8_t ten_or_twelve_bit;
uint8_t color_space;
uint8_t color_range;
uint8_t subsampling_x;
uint8_t subsampling_y;
uint8_t refresh_frame_flags;
uint8_t intra_only;
uint8_t reset_frame_context;
uint8_t ref_frame_idx[VP9_REFS_PER_FRAME];
uint8_t ref_frame_sign_bias[VP9_MAX_REF_FRAMES];
uint8_t allow_high_precision_mv;
uint8_t refresh_frame_context;
uint8_t frame_parallel_decoding_mode;
uint8_t frame_context_idx;
// Frame/render size.
uint8_t found_ref[VP9_REFS_PER_FRAME];
uint16_t frame_width_minus_1;
uint16_t frame_height_minus_1;
uint8_t render_and_frame_size_different;
uint16_t render_width_minus_1;
uint16_t render_height_minus_1;
// Interpolation filter.
uint8_t is_filter_switchable;
uint8_t raw_interpolation_filter_type;
// Loop filter params.
uint8_t loop_filter_level;
uint8_t loop_filter_sharpness;
uint8_t loop_filter_delta_enabled;
uint8_t loop_filter_delta_update;
uint8_t update_ref_delta[VP9_MAX_REF_FRAMES];
int8_t loop_filter_ref_deltas[VP9_MAX_REF_FRAMES];
uint8_t update_mode_delta[2];
int8_t loop_filter_mode_deltas[2];
// Quantization params.
uint8_t base_q_idx;
int8_t delta_q_y_dc;
int8_t delta_q_uv_dc;
int8_t delta_q_uv_ac;
// Segmentation params.
uint8_t segmentation_enabled;
uint8_t segmentation_update_map;
uint8_t segmentation_tree_probs[7];
uint8_t segmentation_temporal_update;
uint8_t segmentation_pred_prob[3];
uint8_t segmentation_update_data;
uint8_t segmentation_abs_or_delta_update;
uint8_t feature_enabled[VP9_MAX_SEGMENTS][VP9_SEG_LVL_MAX];
uint8_t feature_value[VP9_MAX_SEGMENTS][VP9_SEG_LVL_MAX];
uint8_t feature_sign[VP9_MAX_SEGMENTS][VP9_SEG_LVL_MAX];
// Tile info.
uint8_t tile_cols_log2;
uint8_t tile_rows_log2;
uint16_t header_size_in_bytes;
} VP9RawFrameHeader;
typedef struct VP9RawFrame {
VP9RawFrameHeader header;
uint8_t *data;
size_t data_size;
AVBufferRef *data_ref;
} VP9RawFrame;
typedef struct VP9RawSuperframeIndex {
uint8_t superframe_marker;
uint8_t bytes_per_framesize_minus_1;
uint8_t frames_in_superframe_minus_1;
uint32_t frame_sizes[VP9_MAX_FRAMES_IN_SUPERFRAME];
} VP9RawSuperframeIndex;
typedef struct VP9RawSuperframe {
VP9RawFrame frames[VP9_MAX_FRAMES_IN_SUPERFRAME];
VP9RawSuperframeIndex index;
} VP9RawSuperframe;
typedef struct VP9ReferenceFrameState {
int frame_width; // RefFrameWidth
int frame_height; // RefFrameHeight
int subsampling_x; // RefSubsamplingX
int subsampling_y; // RefSubsamplingY
int bit_depth; // RefBitDepth
} VP9ReferenceFrameState;
typedef struct CodedBitstreamVP9Context {
int profile;
// Frame dimensions in 8x8 mode info blocks.
uint16_t mi_cols;
uint16_t mi_rows;
// Frame dimensions in 64x64 superblocks.
uint16_t sb64_cols;
uint16_t sb64_rows;
int frame_width;
int frame_height;
uint8_t subsampling_x;
uint8_t subsampling_y;
int bit_depth;
VP9ReferenceFrameState ref[VP9_NUM_REF_FRAMES];
// Write buffer.
uint8_t *write_buffer;
size_t write_buffer_size;
} CodedBitstreamVP9Context;
#endif /* AVCODEC_CBS_VP9_H */
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