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/* ------------------------------------------------------------------
* Copyright (C) 1998-2010 PacketVideo
*
* 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.
* -------------------------------------------------------------------
*/
#ifndef PVMI_DATA_STREAM_H_INCLUDED
#include "pvmi_data_stream.h"
#endif
// Local constants
#define PVMI_FD_DATASTREAM_GETINFO_SUCCESS 0
#define PVMI_FD_DATASTREAM_GETINFO_FSTAT_FAIL 1
// Macros associated with the state flag
#define PVMI_FD_DS_INVALID_STATE_FLAG 1
#define PVMI_FD_DS_CLOSE_FLAG 2
#define RESET_FD_DS_STATE(x) x=0
#define SET_INVALID_FD_DS_STATE(x) x |= PVMI_FD_DS_INVALID_STATE_FLAG
#define SET_CLOSE_FD_DS_FLAG(x) x |= PVMI_FD_DS_CLOSE_FLAG
#define CHECK_FD_DS_CLOSE_FLAG(x) (x & PVMI_FD_DS_CLOSE_FLAG)
#define CHECK_FD_DS_INVALID_STATE(x) (x & PVMI_FD_DS_INVALID_STATE_FLAG)
PvmiDataStream::PvmiDataStream(int input_fd)
{
RESET_FD_DS_STATE(iDataStreamState);
if ((iFd = input_fd) == -1)
{
SET_INVALID_FD_DS_STATE(iDataStreamState);
return;
}
// get information on the file
if (PVMI_FD_DATASTREAM_GETINFO_SUCCESS != GetFileInfo())
{
SET_INVALID_FD_DS_STATE(iDataStreamState);
}
ipDSObserver = NULL;
iTmpBuffer = NULL;
iTmpSize = 0;
}
PvmiDataStream::PvmiDataStream(const char *filename)
{
RESET_FD_DS_STATE(iDataStreamState);
if ((iFd = open(filename, O_RDONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)) == -1)
{
SET_INVALID_FD_DS_STATE(iDataStreamState);
return;
}
// get information on the file
if (PVMI_FD_DATASTREAM_GETINFO_SUCCESS != GetFileInfo())
{
close(iFd);
SET_INVALID_FD_DS_STATE(iDataStreamState);
}
SET_CLOSE_FD_DS_FLAG(iDataStreamState);
ipDSObserver = NULL;
iTmpBuffer = NULL;
iTmpSize = 0;
}
void PvmiDataStream::SetCallbackHandler(PvmiBasicDataStreamObs* aDSObserver)
{
ipDSObserver = aDSObserver;
}
int PvmiDataStream::GetFileInfo()
{
struct stat fd_stat;
if (-1 == fstat(iFd, &fd_stat))
{
// problem getting file information
return PVMI_FD_DATASTREAM_GETINFO_FSTAT_FAIL;
}
iRegFile = S_ISREG(fd_stat.st_mode);
iFileSize = fd_stat.st_size;
iBlkSize = fd_stat.st_blksize;
return PVMI_FD_DATASTREAM_GETINFO_SUCCESS;
}
PvmiDataStream::~PvmiDataStream()
{
if (CHECK_FD_DS_CLOSE_FLAG(iFd))
{
close(iFd);
}
}
PvmiDataStreamStatus PvmiDataStream::GetFileSize(OsclOffsetT& size)
{
if (CHECK_FD_DS_INVALID_STATE(iDataStreamState))
{
size = -1;
return PVDS_INVALID_STATE;
}
size = iFileSize;
return PVDS_SUCCESS;
}
PvmiDataStreamStatus PvmiDataStream::Read(PvmiDataStreamSession aSessionId,
void* aBuffer,
OsclSizeT& aSize)
{
return InternalRead(aSessionId, aBuffer, aSize, 0, false);
}
PvmiDataStreamStatus PvmiDataStream::ReadAtOffset(PvmiDataStreamSession aSessionId,
void* aBuffer,
OsclSizeT& aSize,
OsclOffsetT aOffset)
{
return InternalRead(aSessionId, aBuffer, aSize, aOffset, true);
}
PvmiDataStreamStatus PvmiDataStream::InternalRead(PvmiDataStreamSession aSessionId,
void* aBuffer,
OsclSizeT& aSize,
OsclOffsetT aOffset,
bool aUseOffset)
{
if (CHECK_FD_DS_INVALID_STATE(iDataStreamState))
{
aSize = -1;
return PVDS_INVALID_STATE;
}
OsclSizeT size;
OsclOffsetT CurrentOffset;
PvmiDataStreamStatus status;
if (aUseOffset)
{
CurrentOffset = GetCurrentPointerPosition(0);
status = Seek(0, aOffset, PVDS_SEEK_SET);
if (PVDS_SUCCESS != status)
return PVDS_FAILURE;
size = read(iFd, aBuffer, aSize);
status = Seek(0, CurrentOffset, PVDS_SEEK_SET);
if (PVDS_SUCCESS != status)
return status; // seeking shouldn't be a issue, yet if it does, then it should exit.
}
else
{
size = read(iFd, aBuffer, aSize);
}
aSize = size;
switch (size)
{
case -1:
status = PVDS_FAILURE;
break;
case 0:
status = PVDS_END_OF_STREAM;
break;
default:
status = PVDS_SUCCESS;
break;
}
return status;
}
PvmiDataStreamStatus PvmiDataStream::Seek(PvmiDataStreamSession aSessionID,
OsclOffsetT& aOffset,
PvmiDataStreamSeekType aSeektype)
{
if (CHECK_FD_DS_INVALID_STATE(iDataStreamState))
{
return PVDS_INVALID_STATE;
}
int seekType = SEEK_CUR;
switch (aSeektype)
{
case PVDS_SEEK_SET:
seekType = SEEK_SET;
break;
case PVDS_SEEK_CUR:
seekType = SEEK_CUR;
break;
case PVDS_SEEK_END:
seekType = SEEK_END;
break;
default:
break;
}
OsclOffsetT offset = lseek(iFd, aOffset, seekType);
if (-1 == offset)
{
return PVDS_FAILURE;
}
aOffset = offset;
return PVDS_SUCCESS;
}
OsclOffsetT PvmiDataStream::GetCurrentPointerPosition(PvmiDataStreamSession aSessionID)
{
return lseek(iFd, 0, SEEK_CUR);
}
PvmiDataStreamStatus PvmiDataStream::Write(PvmiDataStreamSession aSessionID,
void* aBuffer,
OsclSizeT aSize)
{
return InternalWrite(aBuffer, aSize);
}
PvmiDataStreamStatus PvmiDataStream::InternalWrite(void* aBuffer, OsclSizeT aSize)
{
if (CHECK_FD_DS_INVALID_STATE(iDataStreamState))
{
return PVDS_INVALID_STATE;
}
OsclSizeT size;
size = write(iFd, aBuffer, aSize);
if (size != aSize) return PVDS_FAILURE;
return PVDS_SUCCESS;
}
void PvmiDataStream::DataAvailable()
{
// Data is available now, do the read and return the buffer
PvmiDataStreamStatus status = PVDS_SUCCESS;
status = InternalRead(0, iTmpBuffer, iTmpSize, 0, false);
ipDSObserver->NotifyDataAvailable(iTmpSize, status);
}
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