1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 // -*- c++ -*- 19 #ifndef ACCESS_UNIT_H 20 #define ACCESS_UNIT_H 21 22 #include "oscl_media_data.h" 23 24 // Constants controlling the size of the AU container 25 const int AU_MAX_FRAGMENTS = 30; 26 const int AU_IMMEDIATE_DATA = 1500; 27 28 const int DEF_AU_FRAGS = 10; 29 const int DEF_AU_IMMEDIATE_DATA = 100; 30 31 class AccessUnitImplementation; 32 33 typedef MemAllocator<AccessUnitImplementation> AUImplAllocator; 34 35 class AccessUnit 36 { 37 public: 38 39 OSCL_IMPORT_REF AccessUnit(AUImplAllocator* in_alloc, void *hint = 0, const int num_reserved_frags = 1); 40 OSCL_IMPORT_REF ~AccessUnit(); 41 42 43 OSCL_IMPORT_REF MediaStatusClass::status_t AddAUFrag(const BufferFragment& frag, BufferState* buffer_state, 44 int32 location_offset = APPEND_MEDIA_AT_END); 45 46 OSCL_IMPORT_REF MediaStatusClass::status_t AddCodecInfo(BufferFragment& fragment); 47 OSCL_IMPORT_REF MediaStatusClass::status_t AddCodecInfo(void *ptr, int len); 48 49 OSCL_IMPORT_REF void Clear(); 50 51 // void reset(); 52 53 54 OSCL_IMPORT_REF BufferFragment * GetCodecInfo() const; 55 56 MediaStatusClass::status_t GetLocalFragment(BufferFragment& fragment); 57 58 MediaStatusClass::status_t AddLocalAUFrag(BufferFragment& fragment, int32 location_offset = APPEND_MEDIA_AT_END); 59 60 uint32 GetAvailableBufferSize() const; 61 uint32 GetLocalBufsize() const; 62 63 OSCL_IMPORT_REF MediaTimestamp GetTimestamp() const; 64 65 OSCL_IMPORT_REF void SetTimestamp(const MediaTimestamp& timestamp); 66 67 OSCL_IMPORT_REF const BufferFragment* GetMediaFragments() const; 68 69 OSCL_IMPORT_REF BufferState * GetBufferState(const uint32 idx)const; 70 71 OSCL_IMPORT_REF void GetMediaFragment(uint32 index, BufferFragment& frag, BufferState*& buffer_state) const; 72 OSCL_IMPORT_REF BufferFragment * GetMediaFragment(const uint32 idx)const; 73 74 OSCL_IMPORT_REF int32 GetNumFrags() const; 75 // int32 GetNumMediaFrags() const; 76 OSCL_IMPORT_REF int32 GetMaxFrags() const; 77 OSCL_IMPORT_REF uint32 GetLength() const; 78 // uint32 GetSize() const { return GetLength(); }; 79 80 // 81 // The following method emphasize the fact that MediaSize does not count reserved stuff 82 // 83 uint32 GetMediaSize() const 84 { 85 return GetLength(); 86 }; 87 88 void AppendNext(AccessUnit *next_ptr); 89 90 OSCL_IMPORT_REF bool IsLocalData(const OsclMemoryFragment& frag) const; 91 92 OSCL_IMPORT_REF AccessUnit* GetNext() const; 93 94 // 95 // Function match_bit_pattern_with_state() returns 0 if matched, 96 // else it returns the number of bytes counting from the head that are yet to be matched. 97 // 98 OSCL_IMPORT_REF 99 int32 match_bit_pattern_with_state(const int32 idx, const int32 offset, const uint8 * pattern, 100 const uint8 pattern_size_in_bits, const int32 state) const; 101 102 103 // 104 // Function seek() moves the current position forward (if positive) or backward (if negative) by 105 // "delta_in_bytes". It returns false if error is encountered, 106 // else return true and change idx, offset and ptr to the new position. 107 // If boundary is reached, boundaryReached is set to true. 108 // 109 OSCL_IMPORT_REF bool seek(int & idx, int & offset, uint8 * & ptr, bool & boundaryReached, 110 const int delta_in_bytes) const; 111 112 // 113 // Function match_bit_pattern_with_state() 114 // returns true if matched, 115 // else return false; 116 // 117 OSCL_IMPORT_REF bool match_bit_pattern_no_state(const int idx, const int offset, const uint8 * pattern, 118 const uint8 pattern_size_in_bits) const; 119 120 private: 121 AUImplAllocator* alloc; 122 AccessUnitImplementation* rep; 123 void *impl_hint; 124 125 }; 126 127 typedef MemAllocator<AccessUnit> AccessUnitAlloc; 128 129 #endif 130
