85 lines
1.5 KiB
C++
85 lines
1.5 KiB
C++
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#include "RawMediaReader.h"
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#include <limits.h>
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bool IsMyExtension(const wchar_t *filename);
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int RawMediaReaderService::CreateRawMediaReader(const wchar_t *filename, ifc_raw_media_reader **out_reader)
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{
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if (IsMyExtension(filename))
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{
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CGioFile *file = new CGioFile();
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if (!file)
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return NErr_OutOfMemory;
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if (file->Open(filename, 0) != NErr_Success)
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{
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delete file;
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return NErr_FileNotFound;
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}
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RawMediaReader *reader = new RawMediaReader(file);
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if (!reader)
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{
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file->Close();
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delete file;
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return NErr_OutOfMemory;
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}
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*out_reader = reader;
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return NErr_Success;
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}
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else
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{
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return NErr_False;
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}
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}
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#define CBCLASS RawMediaReaderService
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START_DISPATCH;
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CB(CREATERAWMEDIAREADER, CreateRawMediaReader);
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END_DISPATCH;
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#undef CBCLASS
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RawMediaReader::RawMediaReader(CGioFile *file) : file(file)
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{}
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int RawMediaReader::Read( void *buffer, size_t buffer_size, size_t *bytes_read )
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{
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if ( buffer_size > INT_MAX )
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return NErr_BadParameter;
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int file_bytes_read = 0;
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int ret = file->Read( buffer, (int)buffer_size, &file_bytes_read );
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if ( ret == NErr_Success )
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{
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*bytes_read = (size_t)file_bytes_read;
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if ( !file_bytes_read && file->IsEof() )
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return NErr_EndOfFile;
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return NErr_Success;
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}
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else
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return NErr_Error;
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}
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size_t RawMediaReader::Release()
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{
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file->Close();
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delete file;
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file = NULL;
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delete this;
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return 0;
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}
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#define CBCLASS RawMediaReader
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START_DISPATCH;
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CB( RELEASE, Release );
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CB( RAW_READ, Read );
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END_DISPATCH;
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#undef CBCLASS
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