RU:Interfaces
From AVObjects Knowledge Base
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Метод для отправки данных объекту | Метод для отправки данных объекту | ||
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|Library specific variable (see library description) | |Library specific variable (see library description) | ||
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|S_OK | |S_OK | ||
Revision as of 15:57, 25 June 2014
Этот раздел содержит ссылочную информацию об интерфейсах и методах AVObjects Media Library.
Contents |
IAVObject interface
Init
HRESULT Init()
Производит инициализацию данных объекта, для объектов - сплитеров или ридеров производит открытие файлов и начальный парсинг.
Close
HRESULT Close()
Освобождает ресурсы используемые объектом, закрывает файлы, освобождает блоки памяти.
BeginFlush
HRESULT BeginFlush()
EndFlush
HRESULT EndFlush()
Convert
HRESULT Convert( [in] BYTE* pbSrc, [in] int cbSrc, [in] BYTE* pbDst, [in] int cbDst, [out] int* pcbActual, [in] int nReserved, [in] BYTE* pbReserved );
Method for synchronous conversions. If this method is implemented then methods for asynchronous conversions (CanPutFrame(), PutFrame(), CanGetFrame(), GetFrame()) can be not implemented.
Parameters:
| pbSrc | Source buffer for conversion. |
| cbSrc | Size of data in source buffer in bytes. |
| pbDst | Destination buffer for result of conversion. |
| cbDst | Size of destination buffer in bytes |
| pcbActual | Size of returned data in destination buffer in bytes |
| nReserved | Library specific variable (see library description) |
| pbReserved | Library specific variable (see library description) |
Returns:
| S_OK | Converted data in pbDst returned |
| S_FALSE | Required data is not found |
| HRESULT_FROM_WIN32(ERROR_MORE_DATA) | Destination buffer is too small to receive the data |
| E_POINTER | One or more NULL pointer argument |
| E_INVALIDARG | One or more arguments are invalid |
| E_FAIL | Object not initialized yet or other failure. |
CanPutFrame
HRESULT CanPutFrame( [in] int nStream, [in] DWORD nWait );
Метод проверяет возможность отправки данных объекту
Parameters
| nStream | Number of stream |
| nWait | Время ожидания ответа в мкс. |
Returns:
| S_OK | Object ready for PutFrame |
| S_FALSE | Object busy |
| HRESULT_FROM_WIN32(ERROR_HANDLE_EOF) | End of stream |
| E_INVALIDARG | One or more arguments are invalid |
| E_FAIL | Object not initialized yet or other failure. |
PutFrame
HRESULT PutFrame( [in] int nStream, [in] BYTE* pbBuffer, [in] DWORD cbActual, [in] DWORD dwFlags, [in] REFERENCE_TIME tS, [in] REFERENCE_TIME tE, [in] BYTE* pbReserved );
Метод для отправки данных объекту
Parameters:
| nStream | Number of stream |
| pbBuffer | Buffer with data. |
| cbActual | Size of data in buffer in bytes. |
| dwFlags | Library specific bitmap (see library description) |
| tS | Start time |
| tE | End time |
| pbReserved | Library specific variable (see library description) |
Returns:
| S_OK | Data in pbBuffer sended |
| HRESULT_FROM_WIN32(ERROR_HANDLE_EOF) | End of stream |
| E_INVALIDARG | One or more arguments are invalid |
| E_FAIL | Object not initialized yet or other failure. |
CanGetFrame
HRESULT CanGetFrame( [in] int nStream, [in] DWORD nWait );
Метод проверяет возможность получения данных от объекта
Parameters:
| nStream | Number of stream |
| nWait | Время ожидания ответа в мкс. |
Returns:
| S_OK | Object ready for GetFrame |
| S_FALSE | Object busy |
| HRESULT_FROM_WIN32(ERROR_HANDLE_EOF) | End of stream |
| E_INVALIDARG | One or more arguments are invalid |
| E_FAIL | Object not initialized yet or other failure. |
GetFrame
HRESULT GettFrame( [in] int nStream, [in] BYTE* pbBuffer, [in] DWORD cbBuffer, [out] DWORD* pcbActual, [out] DWORD* pdwFlags, [out] REFERENCE_TIME* ptS, [out] REFERENCE_TIME* ptE, [out] BYTE** pbReserved );
Метод для отправки данных объекту
Parameters:
| nStream | Number of stream |
| pbBuffer | Buffer for data. |
| cbBuffer | Size of data in buffer in bytes. |
| cbActual | Size of received data buffer in bytes. |
| pdwFlags | Library specific bitmap (see library description) |
| ptS | Start time |
| ptE | End time |
| ppbReserved | Library specific variable (see library description) |
Returns:
| S_OK | Data in pbBuffer returned |
| E_INVALIDARG | One or more arguments are invalid |
| E_FAIL | Object not initialized yet or other failure. |
