/* * Copyright (C) 2011 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ /** ************************************************************************ * @file M4OSA_FileCommon.c * @brief File common for Android * @note This file implements functions used by both the file writer * and file reader. ************************************************************************ */ #ifndef USE_STAGEFRIGHT_CODECS #error "USE_STAGEFRIGHT_CODECS is not defined" #endif /*USE_STAGEFRIGHT_CODECS*/ #ifdef UTF_CONVERSION #include #endif /*UTF_CONVERSION*/ #include #include #ifdef M4OSA_FILE_BLOCK_WITH_SEMAPHORE #include "M4OSA_Semaphore.h" #endif /* M4OSA_FILE_BLOCK_WITH_SEMAPHORE */ #include "M4OSA_Debug.h" #include "M4OSA_FileCommon.h" #include "M4OSA_FileCommon_priv.h" #include "M4OSA_Memory.h" #include "M4OSA_CharStar.h" /** ************************************************************************ * @brief This function opens the provided URL and returns its context. * If an error occured, the context is set to NULL. * @param core_id: (IN) Core ID of the caller (M4OSA_FILE_READER or M4OSA_FILE_WRITER) * @param context: (OUT) Context of the core file reader * @param url: (IN) URL of the input file * @param fileModeAccess: (IN) File mode access * @return M4NO_ERROR: there is no error * @return M4ERR_PARAMETER: at least one parameter is NULL * @return M4ERR_ALLOC: there is no more memory available * @return M4ERR_NOT_IMPLEMENTED: the URL does not match with the supported * file * @return M4ERR_FILE_NOT_FOUND: the file cannot be found * @return M4ERR_FILE_LOCKED: the file is locked by an other * application/process * @return M4ERR_FILE_BAD_MODE_ACCESS: the file mode access is not correct ************************************************************************ */ M4OSA_ERR M4OSA_fileCommonOpen(M4OSA_UInt16 core_id, M4OSA_Context* pContext, M4OSA_Char* pUrl, M4OSA_FileModeAccess fileModeAccess) { M4OSA_Int32 i = 0; M4OSA_Int32 iMode = 0; M4OSA_Int32 iSize = 0; M4OSA_Int32 iSavePos = 0; M4OSA_Char mode[4] = ""; M4OSA_Char* pReadString = (M4OSA_Char*)"r"; M4OSA_Char* pWriteString = (M4OSA_Char*)"w"; M4OSA_Char* pAppendString = (M4OSA_Char*)"a"; M4OSA_Char* pBinaryString = (M4OSA_Char*)"b"; M4OSA_Char* pPlusString = (M4OSA_Char*)"+"; M4OSA_ERR err = M4NO_ERROR; FILE* pFileHandler = M4OSA_NULL; M4OSA_FileContext *pFileContext = M4OSA_NULL; #ifdef UTF_CONVERSION /*FB: to test the UTF16->UTF8 conversion into Video Artist*/ /*Convert the URL from UTF16 to UTF8*/ M4OSA_Void* tempConversionBuf; M4OSA_UInt32 tempConversionSize = 1000; tempConversionBuf = (M4OSA_Char*)M4OSA_32bitAlignedMalloc(tempConversionSize +1, 0, "conversion buf"); if(tempConversionBuf == M4OSA_NULL) { M4OSA_TRACE1_0("Error when allocating conversion buffer\n"); return M4ERR_PARAMETER; } M4OSA_ToUTF8_OSAL(pUrl, tempConversionBuf, &tempConversionSize); ((M4OSA_Char*)tempConversionBuf)[tempConversionSize ] = '\0'; printf("file open %s\n", tempConversionBuf); #endif /*UTF CONVERSION*/ M4OSA_TRACE3_4("M4OSA_fileCommonOpen\t\tM4OSA_UInt16 %d\tM4OSA_Context* 0x%x\t" "M4OSA_Char* %s\tfileModeAccess %d", core_id, pContext, pUrl, fileModeAccess); M4OSA_DEBUG_IF2(M4OSA_NULL == pContext, M4ERR_PARAMETER, "M4OSA_fileCommonOpen: pContext is M4OSA_NULL"); M4OSA_DEBUG_IF2(M4OSA_NULL == pUrl, M4ERR_PARAMETER, "M4OSA_fileCommonOpen: pUrl is M4OSA_NULL"); M4OSA_DEBUG_IF2(0 == fileModeAccess, M4ERR_PARAMETER, "M4OSA_fileCommonOpen: fileModeAccess is 0"); /* Read mode not set for the reader */ M4OSA_DEBUG_IF1((M4OSA_FILE_READER == core_id) && !(fileModeAccess & M4OSA_kFileRead), M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: M4OSA_kFileRead"); /* Read mode not set for the reader */ M4OSA_DEBUG_IF1((M4OSA_FILE_READER == core_id) && !(fileModeAccess & M4OSA_kFileRead), M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: M4OSA_kFileRead"); /* M4OSAfileReadOpen cannot be used with Write file mode access */ M4OSA_DEBUG_IF1((M4OSA_FILE_READER == core_id) && (fileModeAccess & M4OSA_kFileWrite), M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: M4OSA_kFileWrite"); /* Append and Create flags cannot be used with Read */ M4OSA_DEBUG_IF1((M4OSA_FILE_READER == core_id) && (fileModeAccess & M4OSA_kFileAppend), M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: M4OSA_kFileAppend"); M4OSA_DEBUG_IF1((M4OSA_FILE_READER == core_id) && (fileModeAccess & M4OSA_kFileCreate), M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: M4OSA_kFileCreate"); /* Write mode not set for the writer */ M4OSA_DEBUG_IF1((M4OSA_FILE_WRITER == core_id) && !(fileModeAccess & M4OSA_kFileWrite), M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: M4OSA_kFileWrite"); /* Create flag necessary for opening file */ if ((fileModeAccess & M4OSA_kFileRead) && (fileModeAccess & M4OSA_kFileWrite)&&(fileModeAccess & M4OSA_kFileCreate)) { strncat((char *)mode, (const char *)pWriteString, (size_t)1); strncat((char *)mode, (const char *)pPlusString, (size_t)1); } else { if(fileModeAccess & M4OSA_kFileAppend) { strncat((char *)mode, (const char *)pAppendString, (size_t)1); } else if(fileModeAccess & M4OSA_kFileRead) { strncat((char *)mode, (const char *)pReadString, (size_t)1); } else if(fileModeAccess & M4OSA_kFileWrite) { strncat((char *)mode, (const char *)pWriteString, (size_t)1); } if((fileModeAccess & M4OSA_kFileRead)&&(fileModeAccess & M4OSA_kFileWrite)) { strncat((char *)mode,(const char *)pPlusString, (size_t)1); } } if(!(fileModeAccess & M4OSA_kFileIsTextMode)) { strncat((char *)mode, (const char *)pBinaryString,(size_t)1); } /*Open the file*/ #ifdef UTF_CONVERSION /*Open the converted path*/ pFileHandler = fopen((const char *)tempConversionBuf, (const char *)mode); /*Free the temporary decoded buffer*/ free(tempConversionBuf); #else /* UTF_CONVERSION */ pFileHandler = fopen((const char *)pUrl, (const char *)mode); #endif /* UTF_CONVERSION */ if (M4OSA_NULL == pFileHandler) { switch(errno) { case ENOENT: { M4OSA_DEBUG(M4ERR_FILE_NOT_FOUND, "M4OSA_fileCommonOpen: No such file or directory"); M4OSA_TRACE1_1("File not found: %s", pUrl); return M4ERR_FILE_NOT_FOUND; } case EACCES: { M4OSA_DEBUG(M4ERR_FILE_LOCKED, "M4OSA_fileCommonOpen: Permission denied"); return M4ERR_FILE_LOCKED; } case EINVAL: { M4OSA_DEBUG(M4ERR_FILE_BAD_MODE_ACCESS, "M4OSA_fileCommonOpen: Invalid Argument"); return M4ERR_FILE_BAD_MODE_ACCESS; } case EMFILE: case ENOSPC: case ENOMEM: { M4OSA_DEBUG(M4ERR_ALLOC, "M4OSA_fileCommonOpen: Too many open files"); return M4ERR_ALLOC; } default: { M4OSA_DEBUG(M4ERR_NOT_IMPLEMENTED, "M4OSA_fileCommonOpen"); return M4ERR_NOT_IMPLEMENTED; } } } /* Allocate the file context */ pFileContext = (M4OSA_FileContext*) M4OSA_32bitAlignedMalloc(sizeof(M4OSA_FileContext), core_id, (M4OSA_Char*)"M4OSA_fileCommonOpen: file context"); if (M4OSA_NULL == pFileContext) { fclose(pFileHandler); M4OSA_DEBUG(M4ERR_ALLOC, "M4OSA_fileCommonOpen"); return M4ERR_ALLOC; } pFileContext->file_desc = pFileHandler; pFileContext->access_mode = fileModeAccess; pFileContext->current_seek = SeekNone; pFileContext->b_is_end_of_file = M4OSA_FALSE; /** * Note: Never use this expression "i = (value1 == value2) ? x: y;" * because that doens't compile on other platforms (ADS for example) * Use: if(value1 == value2) * { i= x; ..etc */ pFileContext->coreID_write = 0; pFileContext->coreID_read = 0; pFileContext->m_DescrModeAccess = M4OSA_kDescNoneAccess; if (M4OSA_FILE_READER == core_id) { pFileContext->coreID_read = core_id; pFileContext->m_DescrModeAccess = M4OSA_kDescReadAccess; } else if (M4OSA_FILE_WRITER == core_id) { pFileContext->coreID_write = core_id; pFileContext->m_DescrModeAccess = M4OSA_kDescWriteAccess; } pFileContext->read_position = 0; pFileContext->write_position = 0; /* Allocate the memory to store the URL string */ pFileContext->url_name = (M4OSA_Char*) M4OSA_32bitAlignedMalloc(strlen((const char *)pUrl)+1, core_id, (M4OSA_Char*)"M4OSA_fileCommonOpen: URL name"); if (M4OSA_NULL == pFileContext->url_name) { fclose(pFileHandler); free(pFileContext); M4OSA_DEBUG(M4ERR_ALLOC, "M4OSA_fileCommonOpen"); return M4ERR_ALLOC; } M4OSA_chrNCopy(pFileContext->url_name, pUrl, strlen((const char *)pUrl)+1); /* Get the file name */ err = M4OSA_fileCommonGetFilename(pUrl, &pFileContext->file_name); if(M4NO_ERROR != err) { fclose(pFileHandler); free(pFileContext->url_name); free(pFileContext); M4OSA_DEBUG(err, "M4OSA_fileCommonOpen"); return err; } #ifdef M4OSA_FILE_BLOCK_WITH_SEMAPHORE M4OSA_semaphoreOpen(&(pFileContext->semaphore_context), 1); /* Allocate the semaphore */ #endif /* M4OSA_FILE_BLOCK_WITH_SEMAPHORE */ #ifdef USE_STAGEFRIGHT_CODECS // Workaround for file system bug on Stingray/Honeycomb where a file re-created will keep // the original file's size filled with 0s. Do not seek to the end to avoid ill effects if(fileModeAccess & M4OSA_kFileAppend) { /* Get the file size */ iSavePos = ftell(pFileHandler); /* 1- Check the first position */ fseek(pFileHandler, 0, SEEK_END); /* 2- Go to the end of the file*/ iSize = ftell(pFileHandler); /* 3- Check the file size */ fseek(pFileHandler, iSavePos, SEEK_SET);/* 4- go to the first position */ } else { iSize = 0; } #else /* USE_STAGEFRIGHT_CODECS */ /* Get the file size */ iSavePos = ftell(pFileHandler); /* 1- Check the first position */ fseek(pFileHandler, 0, SEEK_END); /* 2- Go to the end of the file*/ iSize = ftell(pFileHandler); /* 3- Check the file size */ fseek(pFileHandler, iSavePos, SEEK_SET);/* 4- go to the first position */ #endif /* USE_STAGEFRIGHT_CODECS */ /* Warning possible overflow if the file is higher than 2GBytes */ pFileContext->file_size = iSize; *pContext = pFileContext; return M4NO_ERROR; } /** ************************************************************************ * @brief This function convert from UTF16 to UTF8 * @param pBufferIn: (IN) UTF16 input path * @param pBufferOut: (OUT) UTF8 output path * @param bufferOutSize: (IN/OUT) size of the output path * @return M4NO_ERROR: there is no error * @return M4ERR_PARAMETER: the output path size is not enough to contain * the decoded path ************************************************************************ */ #ifdef UTF_CONVERSION M4OSA_ERR M4OSA_ToUTF8_OSAL (M4OSA_Void *pBufferIn, M4OSA_UInt8 *pBufferOut, M4OSA_UInt32 *bufferOutSize) { M4OSA_UInt16 i; wchar_t *w_str = (wchar_t *) pBufferIn; M4OSA_UInt32 len, size_needed, size_given; if (pBufferIn == NULL) { *pBufferOut=NULL; *bufferOutSize=1; } else { len = wcslen(w_str); size_needed = len+1; size_given = *bufferOutSize; *bufferOutSize=size_needed; if (size_given < size_needed ) { return M4ERR_PARAMETER; } else { for (i=0; ifile_size; if(SeekRead == pFileContext->current_seek) { fpos_current = pFileContext->read_position; } else if(SeekWrite == pFileContext->current_seek) { fpos_current = pFileContext->write_position; } else { fpos_current = 0; } switch(seekMode) { case M4OSA_kFileSeekCurrent: { fpos_seek = *pFilePos; break; } case M4OSA_kFileSeekBeginning: { fpos_seek = *pFilePos - fpos_current; break; } case M4OSA_kFileSeekEnd: { fpos_seek = *pFilePos + fpos_file_size - fpos_current; break; } default: { return M4ERR_PARAMETER; } } fpos_seek_from_beginning = fpos_current + fpos_seek; if(fseek(pFileContext->file_desc, fpos_seek, SEEK_CUR) != 0) { switch(errno) { case EINVAL: { /* meaning the value for origin is invalid or the position specified by offset is before the beginning of the file */ return M4ERR_FILE_INVALID_POSITION; } case EBADF: default: { return M4ERR_BAD_CONTEXT;/* file handle is invalid */ } } } /* Set the returned position from the beginning of the file */ *pFilePos = fpos_seek_from_beginning; /* SEEK done, reset end of file value */ pFileContext->b_is_end_of_file = M4OSA_FALSE; return M4NO_ERROR; } /** ************************************************************************ * @brief This function asks to close the file (associated to the context) * @note The context of the core file reader/writer is freed. * @param context: (IN/OUT) Context of the core file reader * @return M4NO_ERROR: there is no error * @return M4ERR_PARAMETER: at least one parameter is NULL * @return M4ERR_BAD_CONTEXT: provided context is not a valid one * @return M4ERR_ALLOC: there is no more memory available ************************************************************************ */ M4OSA_ERR M4OSA_fileCommonClose(M4OSA_UInt16 core_id, M4OSA_Context pContext) { M4OSA_FileContext* pFileContext = pContext; M4OSA_Int32 i32_err_code=0; M4OSA_TRACE3_2("M4OSA_fileCommonClose\tM4OSA_UInt16 %d\tM4OSA_Context 0x%x", core_id, pContext); M4OSA_DEBUG_IF2(M4OSA_NULL == pContext, M4ERR_PARAMETER, "M4OSA_fileCommonClose: pContext is M4OSA_NULL"); #ifdef M4OSA_FILE_BLOCK_WITH_SEMAPHORE M4OSA_DEBUG_IF2(M4OSA_NULL == pFileContext->semaphore_context, M4ERR_BAD_CONTEXT, "M4OSA_fileCommonClose: semaphore_context is M4OSA_NULL"); #endif /* M4OSA_FILE_BLOCK_WITH_SEMAPHORE */ free(pFileContext->url_name); pFileContext->url_name = M4OSA_NULL; free(pFileContext->file_name); pFileContext->file_name = M4OSA_NULL; i32_err_code = fclose(pFileContext->file_desc); pFileContext->file_desc = M4OSA_NULL; #ifdef M4OSA_FILE_BLOCK_WITH_SEMAPHORE M4OSA_semaphoreClose(pFileContext->semaphore_context);/* free the semaphore */ #endif /* M4OSA_FILE_BLOCK_WITH_SEMAPHORE */ free(pFileContext); if (i32_err_code != 0) { M4OSA_DEBUG(M4ERR_BAD_CONTEXT, "M4OSA_fileCommonClose"); return M4ERR_BAD_CONTEXT; } return M4NO_ERROR; } /** ************************************************************************ * @brief This function gets the file attributes (associated to the * context) * @param context: (IN) Context of the core file reader * @param attribute: (OUT) The file attribute (allocated by the caller) * @return M4NO_ERROR: there is no error * @return M4ERR_PARAMETER: at least one parameter is NULL * @return M4ERR_BAD_CONTEXT: provided context is not a valid one ************************************************************************ */ M4OSA_ERR M4OSA_fileCommonGetAttribute(M4OSA_Context pContext, M4OSA_FileAttribute* pAttribute) { M4OSA_FileContext* fileContext = pContext; struct stat TheStat; M4OSA_TRACE3_2("M4OSA_fileCommonGetAttribute\tM4OSA_Context 0x%x\t" "M4OSA_FileAttribute* 0x%x", pContext, pAttribute); M4OSA_DEBUG_IF2(M4OSA_NULL == pContext, M4ERR_PARAMETER, "M4OSA_fileCommonGetAttribute"); M4OSA_DEBUG_IF2(M4OSA_NULL == pAttribute, M4ERR_PARAMETER, "M4OSA_fileCommonGetAttribute"); if(stat((char*)fileContext->url_name, &TheStat) != 0) { M4OSA_DEBUG(M4ERR_BAD_CONTEXT, "M4OSA_fileCommonGetAttribute"); return M4ERR_BAD_CONTEXT; } pAttribute->creationDate.time = (M4OSA_Time)TheStat.st_ctime; pAttribute->lastAccessDate.time = (M4OSA_Time)TheStat.st_atime; pAttribute->modifiedDate.time = (M4OSA_Time)TheStat.st_mtime; pAttribute->creationDate.timeScale = 1; pAttribute->lastAccessDate.timeScale = 1; pAttribute->modifiedDate.timeScale = 1; pAttribute->creationDate.referenceYear = 1970; pAttribute->lastAccessDate.referenceYear = 1970; pAttribute->modifiedDate.referenceYear = 1970; pAttribute->modeAccess = fileContext->access_mode; return M4NO_ERROR; } /** ************************************************************************ * @brief This function gets the file URL (associated to the context). * @note * @param context: (IN) Context of the core file reader * @param url: (OUT) The buffer containing the URL (allocated by * M4OSA_fileCommonGetURL) * @return M4NO_ERROR: there is no error * @return M4ERR_PARAMETER: at least one parameter is NULL * @return M4ERR_BAD_CONTEXT: provided context is not a valid one * @return M4ERR_ALLOC: there is no more memory available ************************************************************************ */ M4OSA_ERR M4OSA_fileCommonGetURL(M4OSA_Context pContext, M4OSA_Char** pUrl) { M4OSA_FileContext* pFileContext = pContext; M4OSA_UInt32 uiLength; M4OSA_TRACE3_2("M4OSA_fileCommonGetURL\tM4OSA_Context 0x%x\tM4OSA_Char** 0x%x", pContext, pUrl); M4OSA_DEBUG_IF2(M4OSA_NULL == pContext, M4ERR_PARAMETER, "M4OSA_fileCommonGetURL: pContext is M4OSA_NULL"); M4OSA_DEBUG_IF2(M4OSA_NULL == pUrl, M4ERR_PARAMETER, "M4OSA_fileCommonGetURL: pUrl is M4OSA_NULL"); uiLength = strlen((const char *)pFileContext->url_name)+1; /* Allocate the memory to store the url_name */ *pUrl = (M4OSA_Char*)M4OSA_32bitAlignedMalloc(uiLength, M4OSA_FILE_COMMON, (M4OSA_Char*)"M4OSA_fileCommonGetURL: url"); if(M4OSA_NULL == *pUrl) { M4OSA_DEBUG(M4ERR_ALLOC, "M4OSA_fileCommonGetURL"); return M4ERR_ALLOC; } M4OSA_chrNCopy(*pUrl, pFileContext->url_name, uiLength); return M4NO_ERROR; } /** ************************************************************************ * @brief This function gets a string containing the file name associated * to the input URL. * @note The user should not forget to delete the output string using * M4OSA_strDestroy * @param pUrl: (IN) The buffer containing the URL * @param pFileName: (OUT) The string containing the URL. It is * allocated inside this function * @return M4NO_ERROR: there is no error * @return M4ERR_NOT_IMPLEMENTED: the URL does not match with the supported * file * @return M4ERR_ALLOC: there is no more memory available ************************************************************************ */ M4OSA_ERR M4OSA_fileCommonGetFilename(M4OSA_Char* pUrl, M4OSA_Char** pFileName) { M4OSA_Int32 i = 0; M4OSA_Int32 iUrlLen = 0; M4OSA_Int32 FileNameLen = 0; M4OSA_Char* ptrUrl = M4OSA_NULL; M4OSA_Char* ptrFilename = M4OSA_NULL; M4OSA_TRACE3_2("M4OSA_fileCommonGetURL\tM4OSA_Char* %s\tM4OSA_Char** 0x%x", pUrl, pFileName); M4OSA_DEBUG_IF2(M4OSA_NULL == pUrl, M4ERR_PARAMETER, "M4OSA_fileCommonGetFilename: pUrl is M4OSA_NULL"); M4OSA_DEBUG_IF2(M4OSA_NULL == pFileName, M4ERR_PARAMETER, "M4OSA_fileCommonGetFilename: pFileName is M4OSA_NULL"); *pFileName = M4OSA_NULL; /*Parse URL*/ iUrlLen = strlen((const char *)pUrl); for(i=iUrlLen-1; i>=0; i--) { if (pUrl[i] != '\\' && pUrl[i] != '/') { FileNameLen++; } else { break; /* find the beginning of the file name */ } } ptrFilename = (M4OSA_Char*) M4OSA_32bitAlignedMalloc(FileNameLen+1, M4OSA_FILE_COMMON, (M4OSA_Char*)"M4OSA_fileCommonGetFilename: Filename string"); if (ptrFilename == M4OSA_NULL) { M4OSA_DEBUG(M4ERR_ALLOC, "M4OSA_fileCommonGetFilename"); return M4ERR_ALLOC; } ptrUrl = pUrl + (iUrlLen - FileNameLen); M4OSA_chrNCopy(ptrFilename, ptrUrl, FileNameLen+1); *pFileName = ptrFilename; return M4NO_ERROR; }