1 // Copyright (c) 2012 The WebM project authors. All Rights Reserved. 2 // 3 // Use of this source code is governed by a BSD-style license 4 // that can be found in the LICENSE file in the root of the source 5 // tree. An additional intellectual property rights grant can be found 6 // in the file PATENTS. All contributing project authors may 7 // be found in the AUTHORS file in the root of the source tree. 8 9 #include "mkvwriter.hpp" 10 11 #ifdef _MSC_VER 12 #include <share.h> // for _SH_DENYWR 13 #endif 14 15 #include <new> 16 17 namespace mkvmuxer { 18 19 MkvWriter::MkvWriter() : file_(NULL), writer_owns_file_(true) { 20 } 21 22 MkvWriter::MkvWriter(FILE* fp): file_(fp), writer_owns_file_(false) { 23 } 24 25 MkvWriter::~MkvWriter() { 26 Close(); 27 } 28 29 int32 MkvWriter::Write(const void* buffer, uint32 length) { 30 if (!file_) 31 return -1; 32 33 if (length == 0) 34 return 0; 35 36 if (buffer == NULL) 37 return -1; 38 39 const size_t bytes_written = fwrite(buffer, 1, length, file_); 40 41 return (bytes_written == length) ? 0 : -1; 42 } 43 44 bool MkvWriter::Open(const char* filename) { 45 if (filename == NULL) 46 return false; 47 48 if (file_) 49 return false; 50 51 #ifdef _MSC_VER 52 file_ = _fsopen(filename, "wb", _SH_DENYWR); 53 #else 54 file_ = fopen(filename, "wb"); 55 #endif 56 if (file_ == NULL) 57 return false; 58 return true; 59 } 60 61 void MkvWriter::Close() { 62 if (file_ && writer_owns_file_) { 63 fclose(file_); 64 } 65 file_ = NULL; 66 } 67 68 int64 MkvWriter::Position() const { 69 if (!file_) 70 return 0; 71 72 #ifdef _MSC_VER 73 return _ftelli64(file_); 74 #else 75 return ftell(file_); 76 #endif 77 } 78 79 int32 MkvWriter::Position(int64 position) { 80 if (!file_) 81 return -1; 82 83 #ifdef _MSC_VER 84 return _fseeki64(file_, position, SEEK_SET); 85 #else 86 return fseek(file_, position, SEEK_SET); 87 #endif 88 } 89 90 bool MkvWriter::Seekable() const { 91 return true; 92 } 93 94 void MkvWriter::ElementStartNotify(uint64, int64) { 95 } 96 97 } // namespace mkvmuxer 98
