bitstream.h

/*
 * Copyright (c) 2016, Alliance for Open Media. All rights reserved
 *
 * This source code is subject to the terms of the BSD 2 Clause License and
 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
 * was not distributed with this source code in the LICENSE file, you can
 * obtain it at www.aomedia.org/license/software. If the Alliance for Open
 * Media Patent License 1.0 was not distributed with this source code in the
 * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
 */
 
#ifndef AOM_AV1_ENCODER_BITSTREAM_H_
#define AOM_AV1_ENCODER_BITSTREAM_H_
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "av1/common/av1_common_int.h"
#include "av1/common/blockd.h"
#include "av1/common/enums.h"
#include "av1/encoder/level.h"
#include "aom_dsp/bitwriter.h"
 
struct aom_write_bit_buffer;
struct AV1_COMP;
struct ThreadData;
 
// Stores the location and size of a tile's data in the bitstream.  Used for
// later identifying identical tiles
typedef struct {
  uint8_t *data;
  size_t size;
} TileBufferEnc;
 
typedef struct {
  uint8_t *frame_header;
  size_t obu_header_byte_offset;
  size_t total_length;
} FrameHeaderInfo;
 
typedef struct {
  struct aom_write_bit_buffer *saved_wb;  // Bit stream buffer writer structure
  TileBufferEnc buf;     // Structure to hold bitstream buffer and size
  uint32_t *total_size;  // Size of the bitstream buffer for the tile in bytes
  uint8_t *dst;          // Base address of tile bitstream buffer
  uint8_t *tile_data_curr;   // Base address of tile-group bitstream buffer
  size_t tile_buf_size;      // Available bitstream buffer for the tile in bytes
  uint8_t obu_extn_header;   // Presence of OBU extension header
  uint32_t obu_header_size;  // Size of the OBU header
  int curr_tg_hdr_size;      // Size of the obu, tg, frame headers
  int tile_size_mi;          // Tile size in mi units
  int tile_row;              // Number of tile rows
  int tile_col;              // Number of tile columns
  int is_last_tile_in_tg;    // Flag to indicate last tile in a tile-group
  int new_tg;                // Flag to indicate starting of a new tile-group
} PackBSParams;
 
typedef struct {
  uint64_t abs_sum_level;
  uint16_t tile_idx;
} PackBSTileOrder;
 
// Pack bitstream data for pack bitstream multi-threading.
typedef struct {
#if CONFIG_MULTITHREAD
<