obudec.h (1724B)
1 /* 2 * Copyright (c) 2017, 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 #ifndef AOM_COMMON_OBUDEC_H_ 12 #define AOM_COMMON_OBUDEC_H_ 13 14 #include "common/tools_common.h" 15 16 #ifdef __cplusplus 17 extern "C" { 18 #endif 19 20 struct ObuDecInputContext { 21 struct AvxInputContext *avx_ctx; 22 uint8_t *buffer; 23 size_t buffer_capacity; 24 size_t bytes_buffered; 25 int is_annexb; 26 }; 27 28 // Returns 1 when file data starts (if Annex B stream, after reading the 29 // size of the OBU) with what appears to be a Temporal Delimiter 30 // OBU as defined by Section 5 of the AV1 bitstream specification. 31 int file_is_obu(struct ObuDecInputContext *obu_ctx); 32 33 // Reads one Temporal Unit from the input file. Returns 0 when a TU is 34 // successfully read, 1 when end of file is reached, and less than 0 when an 35 // error occurs. Stores TU data in 'buffer'. Reallocs buffer to match TU size, 36 // returns buffer capacity via 'buffer_size', and returns size of buffered data 37 // via 'bytes_read'. 38 int obudec_read_temporal_unit(struct ObuDecInputContext *obu_ctx, 39 uint8_t **buffer, size_t *bytes_read, 40 size_t *buffer_size); 41 42 void obudec_free(struct ObuDecInputContext *obu_ctx); 43 44 #ifdef __cplusplus 45 } /* extern "C" */ 46 #endif 47 48 #endif // AOM_COMMON_OBUDEC_H_