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#include "main.h"
#include "RawReader.h"
#include "FileTypes.h"
#include <shlwapi.h>
#define NS_E_FILE_IS_CORRUPTED _HRESULT_TYPEDEF_(0xC00D080DL)
bool IsMyExtension(const wchar_t *filename)
{
const wchar_t *ext = PathFindExtension(filename);
if (ext && *ext)
{
ext++;
return fileTypes.GetAVType(ext) != -1;
}
return false;
}
int RawMediaReaderService::CreateRawMediaReader(const wchar_t *filename, ifc_raw_media_reader **out_reader)
{
if (IsMyExtension(filename))
{
IWMSyncReader *reader = 0;
if (!SUCCEEDED(WMCreateSyncReader(NULL, 0, &reader)))
{
return NErr_FailedCreate;
}
if (FAILED(reader->Open(filename)))
{
reader->Release();
reader = 0;
return NErr_FileNotFound; // TODO: check HRESULT
}
RawMediaReader *raw_reader = new RawMediaReader();
if (!raw_reader)
{
reader->Close();
reader->Release();
return NErr_OutOfMemory;
}
int ret = raw_reader->Initialize(reader);
if (ret != NErr_Success)
{
delete raw_reader;
return ret;
}
*out_reader = raw_reader;
return NErr_Success;
}
else
{
return NErr_False;
}
}
#define CBCLASS RawMediaReaderService
START_DISPATCH;
CB(CREATERAWMEDIAREADER, CreateRawMediaReader);
END_DISPATCH;
#undef CBCLASS
RawMediaReader::RawMediaReader()
{
reader=0;
stream_num=0;
buffer_used=0;
end_of_file=false;
length=0;
buffer=0;
next_output=0;
}
RawMediaReader::~RawMediaReader()
{
if (reader)
{
reader->Close();
reader->Release();
}
if (buffer)
{
buffer->Release();
}
}
int RawMediaReader::Initialize(IWMSyncReader *reader)
{
this->reader=reader;
return NErr_Success;
}
int RawMediaReader::Read(void *out_buffer, size_t buffer_size, size_t *bytes_read)
{
/* we don't care about these, but the API does not allows NULL */
QWORD sample_time = 0, duration = 0;
size_t bytesCopied = 0;
uint8_t *dest = (uint8_t *)out_buffer;
for (;;)
{
if (buffer)
{
BYTE *bufferBytes = 0;
DWORD bufferTotal = 0;
buffer->GetBufferAndLength(&bufferBytes, &bufferTotal);
if (buffer_used < bufferTotal)
{
size_t toCopy = min(bufferTotal - buffer_used, buffer_size);
memcpy(dest, bufferBytes + buffer_used, toCopy);
buffer_used += toCopy;
buffer_size -= toCopy;
dest += toCopy;
bytesCopied += toCopy;
if (buffer_used == bufferTotal)
{
buffer_used = 0;
buffer->Release();
buffer = 0;
}
}
if (buffer_size == 0)
{
*bytes_read = bytesCopied;
return NErr_Success;
}
}
if (stream_num == 0)
{
DWORD outputs = 0;
HRESULT hr=reader->GetOutputCount(&outputs);
if (FAILED(hr))
return NErr_Error;
if (next_output >= outputs)
return NErr_EndOfFile;
hr=reader->GetStreamNumberForOutput(next_output, &stream_num);
if (FAILED(hr))
return NErr_Error;
hr=reader->SetReadStreamSamples(stream_num, TRUE);
if (FAILED(hr))
return NErr_Error;
next_output++;
}
DWORD flags = 0;
HRESULT r = reader->GetNextSample(stream_num, &buffer, &sample_time, &duration, &flags, 0, 0);
if (r == NS_E_NO_MORE_SAMPLES || r == NS_E_FILE_IS_CORRUPTED)
{
stream_num=0;
}
}
return NErr_Error;
}
size_t RawMediaReader::Release()
{
delete this;
return 0;
}
#define CBCLASS RawMediaReader
START_DISPATCH;
CB(RELEASE, Release);
CB(RAW_READ, Read);
END_DISPATCH;
#undef CBCLASS
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