1 /* 2 * Copyright (c) 2016, Alliance for Open Media. All rights reserved 3 * 4 * This source code is subject to the terms of the BSD 2 Clause License and 5 * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License 6 * was not distributed with this source code in the LICENSE file, you can 7 * obtain it at www.aomedia.org/license/software. If the Alliance for Open 8 * Media Patent License 1.0 was not distributed with this source code in the 9 * PATENTS file, you can obtain it at www.aomedia.org/license/patent. 10 */ 11 12 #ifndef AOM_AV1_ENCODER_BITSTREAM_H_ 13 #define AOM_AV1_ENCODER_BITSTREAM_H_ 14 15 #ifdef __cplusplus 16 extern "C" { 17 #endif 18 19 #include "av1/common/av1_common_int.h" 20 #include "av1/common/blockd.h" 21 #include "av1/common/enums.h" 22 #include "av1/encoder/level.h" 23 #include "aom_dsp/bitwriter.h" 24 #include "aom_util/aom_pthread.h" 25 26 struct aom_write_bit_buffer; 27 struct AV1_COMP; 28 struct ThreadData; 29 30 /*!\cond */ 31 32 // Stores the location and size of a tile's data in the bitstream. Used for 33 // later identifying identical tiles 34 typedef struct { 35 uint8_t *data; 36 size_t size; 37 } TileBufferEnc; 38 39 typedef struct { 40 uint8_t *frame_header; 41 size_t obu_header_byte_offset; 42 size_t total_length; 43 } FrameHeaderInfo; 44 45 typedef struct { 46 struct aom_write_bit_buffer *saved_wb; // Bit stream buffer writer structure 47 TileBufferEnc buf; // Structure to hold bitstream buffer and size 48 uint32_t *total_size; // Size of the bitstream buffer for the tile in bytes 49 uint8_t *dst; // Base address of tile bitstream buffer 50 uint8_t *tile_data_curr; // Base address of tile-group bitstream buffer 51 size_t tile_buf_size; // Available bitstream buffer for the tile in bytes 52 uint8_t obu_extn_header; // Presence of OBU extension header 53 uint32_t obu_header_size; // Size of the OBU header 54 int curr_tg_hdr_size; // Size of the obu, tg, frame headers 55 int tile_size_mi; // Tile size in mi units 56 int tile_row; // Number of tile rows 57 int tile_col; // Number of tile columns 58 int is_last_tile_in_tg; // Flag to indicate last tile in a tile-group 59 int new_tg; // Flag to indicate starting of a new tile-group 60 } PackBSParams; 61 62 typedef struct { 63 uint64_t abs_sum_level; 64 uint16_t tile_idx; 65 } PackBSTileOrder; 66 67 // Pack bitstream data for pack bitstream multi-threading. 68 typedef struct { 69 #if CONFIG_MULTITHREAD 70 // Mutex lock used while dispatching jobs. 71 pthread_mutex_t *mutex_; 72 #endif 73 // Tile order structure of pack bitstream multithreading. 74 PackBSTileOrder pack_bs_tile_order[MAX_TILES]; 75 76 // Index of next job to be processed. 77 int next_job_idx; 78 // Initialized to false, set to true by the worker thread that encounters an 79 // error in order to abort the processing of other worker threads. 80 bool pack_bs_mt_exit; 81 } AV1EncPackBSSync; 82 83 /*!\endcond */ 84 85 // Writes only the OBU Sequence Header payload, and returns the size of the 86 // payload written to 'dst'. This function does not write the OBU header, the 87 // optional extension, or the OBU size to 'dst'. 88 uint32_t av1_write_sequence_header_obu(const SequenceHeader *seq_params, 89 uint8_t *const dst); 90 91 // Writes the OBU header byte, and the OBU header extension byte when 92 // 'obu_extension' is non-zero. Returns number of bytes written to 'dst'. 93 uint32_t av1_write_obu_header(AV1LevelParams *const level_params, 94 int *frame_header_count, OBU_TYPE obu_type, 95 int obu_extension, uint8_t *const dst); 96 97 int av1_write_uleb_obu_size(size_t obu_header_size, size_t obu_payload_size, 98 uint8_t *dest); 99 100 // Pack tile data in the bitstream with tile_group, frame 101 // and OBU header. 102 void av1_pack_tile_info(struct AV1_COMP *const cpi, struct ThreadData *const td, 103 PackBSParams *const pack_bs_params); 104 105 void av1_write_last_tile_info( 106 struct AV1_COMP *const cpi, const FrameHeaderInfo *fh_info, 107 struct aom_write_bit_buffer *saved_wb, size_t *curr_tg_data_size, 108 uint8_t *curr_tg_start, uint32_t *const total_size, 109 uint8_t **tile_data_start, int *const largest_tile_id, 110 int *const is_first_tg, uint32_t obu_header_size, uint8_t obu_extn_header); 111 112 /*!\brief Pack the bitstream for one frame 113 * 114 * \ingroup high_level_algo 115 * \callgraph 116 */ 117 int av1_pack_bitstream(struct AV1_COMP *const cpi, uint8_t *dst, size_t *size, 118 int *const largest_tile_id); 119 120 void av1_write_tx_type(const AV1_COMMON *const cm, const MACROBLOCKD *xd, 121 TX_TYPE tx_type, TX_SIZE tx_size, aom_writer *w); 122 123 void av1_reset_pack_bs_thread_data(struct ThreadData *const td); 124 125 void av1_accumulate_pack_bs_thread_data(struct AV1_COMP *const cpi, 126 struct ThreadData const *td); 127 128 void av1_write_obu_tg_tile_headers(struct AV1_COMP *const cpi, 129 MACROBLOCKD *const xd, 130 PackBSParams *const pack_bs_params, 131 const int tile_idx); 132 133 int av1_neg_interleave(int x, int ref, int max); 134 #ifdef __cplusplus 135 } // extern "C" 136 #endif 137 138 #endif // AOM_AV1_ENCODER_BITSTREAM_H_ 139