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6af76b3daa
wine/dlls/quartz/mpegsplit.c
Alexandre Julliard 6af76b3daa quartz: Avoid %ll printf formats.
2008-03-26 18:01:09 +01:00

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/*
* MPEG Splitter Filter
*
* Copyright 2003 Robert Shearman
* Copyright 2004-2005 Christian Costa
* Copyright 2007 Chris Robinson
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include <math.h>
#include "quartz_private.h"
#include "control_private.h"
#include "pin.h"
#include "uuids.h"
#include "mmreg.h"
#include "mmsystem.h"
#include "winternl.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "parser.h"
WINE_DEFAULT_DEBUG_CHANNEL(quartz);
#define SEQUENCE_HEADER_CODE 0xB3
#define PACK_START_CODE 0xBA
#define SYSTEM_START_CODE 0xBB
#define AUDIO_ELEMENTARY_STREAM 0xC0
#define VIDEO_ELEMENTARY_STREAM 0xE0
#define MPEG_SYSTEM_HEADER 3
#define MPEG_VIDEO_HEADER 2
#define MPEG_AUDIO_HEADER 1
#define MPEG_NO_HEADER 0
typedef struct MPEGSplitterImpl
{
ParserImpl Parser;
IMediaSample *pCurrentSample;
LONGLONG EndOfFile;
LONGLONG duration;
LONGLONG position;
DWORD skipbytes;
DWORD remaining_bytes;
} MPEGSplitterImpl;
static int MPEGSplitter_head_check(const BYTE *header)
{
/* If this is a possible start code, check for a system or video header */
if (header[0] == 0 && header[1] == 0 && header[2] == 1)
{
/* Check if we got a system or elementary stream start code */
if (header[3] == PACK_START_CODE ||
header[3] == VIDEO_ELEMENTARY_STREAM ||
header[3] == AUDIO_ELEMENTARY_STREAM)
return MPEG_SYSTEM_HEADER;
/* Check for a MPEG video sequence start code */
if (header[3] == SEQUENCE_HEADER_CODE)
return MPEG_VIDEO_HEADER;
}
/* This should give a good guess if we have an MPEG audio header */
if(header[0] == 0xff && ((header[1]>>5)&0x7) == 0x7 &&
((header[1]>>1)&0x3) != 0 && ((header[2]>>4)&0xf) != 0xf &&
((header[2]>>2)&0x3) != 0x3)
return MPEG_AUDIO_HEADER;
/* Nothing yet.. */
return MPEG_NO_HEADER;
}
static const WCHAR wszAudioStream[] = {'A','u','d','i','o',0};
static const WCHAR wszVideoStream[] = {'V','i','d','e','o',0};
static const DWORD freqs[10] = { 44100, 48000, 32000, 22050, 24000, 16000, 11025, 12000, 8000, 0 };
static const DWORD tabsel_123[2][3][16] = {
{ {0,32,64,96,128,160,192,224,256,288,320,352,384,416,448,},
{0,32,48,56, 64, 80, 96,112,128,160,192,224,256,320,384,},
{0,32,40,48, 56, 64, 80, 96,112,128,160,192,224,256,320,} },
{ {0,32,48,56,64,80,96,112,128,144,160,176,192,224,256,},
{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,},
{0,8,16,24,32,40,48,56,64,80,96,112,128,144,160,} }
};
static HRESULT parse_header(BYTE *header, LONGLONG *plen, LONGLONG *pduration)
{
LONGLONG duration = *pduration;
int bitrate_index, freq_index, mode_ext, emphasis, lsf = 1, mpeg1, layer, mode, padding, bitrate, length;
if (!(header[0] == 0xff && ((header[1]>>5)&0x7) == 0x7 &&
((header[1]>>1)&0x3) != 0 && ((header[2]>>4)&0xf) != 0xf &&
((header[2]>>2)&0x3) != 0x3))
{
WARN("Not a valid header: %02x:%02x\n", header[0], header[1]);
return E_INVALIDARG;
}
mpeg1 = (header[1]>>4)&0x1;
if (mpeg1)
lsf = ((header[1]>>3)&0x1)^1;
layer = 4-((header[1]>>1)&0x3);
bitrate_index = ((header[2]>>4)&0xf);
freq_index = ((header[2]>>2)&0x3) + (mpeg1?(lsf*3):6);
padding = ((header[2]>>1)&0x1);
mode = ((header[3]>>6)&0x3);
mode_ext = ((header[3]>>4)&0x3);
emphasis = ((header[3]>>0)&0x3);
bitrate = tabsel_123[lsf][layer-1][bitrate_index] * 1000;
if (layer == 3 || layer == 2)
length = 144 * bitrate / freqs[freq_index] + padding;
else
length = 4 * (12 * bitrate / freqs[freq_index] + padding);
duration = (ULONGLONG)10000000 * (ULONGLONG)(length) / (ULONGLONG)(bitrate/8);
*plen = length;
*pduration += duration;
return S_OK;
}
static void skip_data(BYTE** from, DWORD *flen, DWORD amount)
{
*flen -= amount;
if (!*flen)
*from = NULL;
else
*from += amount;
}
static HRESULT copy_data(IMediaSample *to, BYTE** from, DWORD *flen, DWORD amount)
{
HRESULT hr = S_OK;
BYTE *ptr = NULL;
DWORD oldlength = IMediaSample_GetActualDataLength(to);
hr = IMediaSample_SetActualDataLength(to, oldlength + amount);
if (FAILED(hr))
{
if (!oldlength || oldlength <= 4)
WARN("Could not set require length\n");
return hr;
}
IMediaSample_GetPointer(to, &ptr);
memcpy(ptr + oldlength, *from, amount);
skip_data(from, flen, amount);
return hr;
}
static HRESULT FillBuffer(MPEGSplitterImpl *This, BYTE** fbuf, DWORD *flen)
{
Parser_OutputPin * pOutputPin = (Parser_OutputPin*)This->Parser.ppPins[1];
LONGLONG length = 0;
HRESULT hr = S_OK;
DWORD dlen;
LONGLONG time = This->position, sampleduration = 0;
TRACE("Source length: %u, skip length: %u, remaining: %u\n", *flen, This->skipbytes, This->remaining_bytes);
/* Case where bytes are skipped */
if (This->skipbytes)
{
DWORD skip = min(This->skipbytes, *flen);
skip_data(fbuf, flen, skip);
This->skipbytes -= skip;
return S_OK;
}
/* Case where there is already an output sample being held */
if (This->remaining_bytes)
{
DWORD towrite = min(This->remaining_bytes, *flen);
hr = copy_data(This->pCurrentSample, fbuf, flen, towrite);
if (FAILED(hr))
{
WARN("Could not resize sample: %08x\n", hr);
goto release;
}
This->remaining_bytes -= towrite;
if (This->remaining_bytes)
return hr;
/* Optimize: Try appending more samples to the stream */
goto out_append;
}
/* Special case, last source sample might (or might not have) had a header, and now we want to retrieve it */
dlen = IMediaSample_GetActualDataLength(This->pCurrentSample);
if (dlen > 0 && dlen < 4)
{
BYTE *header = NULL;
DWORD attempts = 0;
/* Shoot anyone with a small sample! */
assert(*flen >= 6);
hr = IMediaSample_GetPointer(This->pCurrentSample, &header);
if (SUCCEEDED(hr))
hr = IMediaSample_SetActualDataLength(This->pCurrentSample, 7);
if (FAILED(hr))
{
WARN("Could not resize sample: %08x\n", hr);
goto release;
}
memcpy(header + dlen, *fbuf, 6 - dlen);
while (FAILED(parse_header(header+attempts, &length, &This->position)) && attempts < dlen)
{
attempts++;
}
/* No header found */
if (attempts == dlen)
{
hr = IMediaSample_SetActualDataLength(This->pCurrentSample, 0);
return hr;
}
IMediaSample_SetActualDataLength(This->pCurrentSample, 4);
IMediaSample_SetTime(This->pCurrentSample, &time, &This->position);
/* Move header back to beginning */
if (attempts)
memmove(header, header+attempts, 4);
This->remaining_bytes = length - 4;
*flen -= (4 - dlen + attempts);
*fbuf += (4 - dlen + attempts);
return hr;
}
/* Destination sample should contain no data! But the source sample should */
assert(!dlen);
assert(*flen);
/* Find the next valid header.. it <SHOULD> be right here */
while (*flen > 3 && FAILED(parse_header(*fbuf, &length, &This->position)))
{
skip_data(fbuf, flen, 1);
}
/* Uh oh, no header found! */
if (*flen < 4)
{
assert(!length);
hr = copy_data(This->pCurrentSample, fbuf, flen, *flen);
return hr;
}
IMediaSample_SetTime(This->pCurrentSample, &time, &This->position);
if (*flen < length)
{
/* Partial copy: Copy 4 bytes, the rest will be copied by the logic for This->remaining_bytes */
This->remaining_bytes = length - 4;
copy_data(This->pCurrentSample, fbuf, flen, 4);
return hr;
}
hr = copy_data(This->pCurrentSample, fbuf, flen, length);
if (FAILED(hr))
{
WARN("Couldn't set data size to %x%08x\n", (DWORD)(length >> 32), (DWORD)length);
This->skipbytes = length;
return hr;
}
out_append:
/* Optimize: Send multiple samples! */
while (*flen >= 4)
{
if (FAILED(parse_header(*fbuf, &length, &sampleduration)))
break;
if (length > *flen)
break;
if (FAILED(copy_data(This->pCurrentSample, fbuf, flen, length)))
break;
This->position += sampleduration;
sampleduration = 0;
IMediaSample_SetTime(This->pCurrentSample, &time, &This->position);
}
TRACE("Media time: %u.%03u\n", (DWORD)(This->position/10000000), (DWORD)((This->position/10000)%1000));
hr = OutputPin_SendSample(&pOutputPin->pin, This->pCurrentSample);
if (FAILED(hr))
WARN("Error sending sample (%x)\n", hr);
release:
IMediaSample_Release(This->pCurrentSample);
This->pCurrentSample = NULL;
return hr;
}
static HRESULT MPEGSplitter_process_sample(LPVOID iface, IMediaSample * pSample)
{
MPEGSplitterImpl *This = (MPEGSplitterImpl*)iface;
BYTE *pbSrcStream;
DWORD cbSrcStream = 0;
REFERENCE_TIME tStart, tStop;
Parser_OutputPin * pOutputPin;
HRESULT hr;
pOutputPin = (Parser_OutputPin*)This->Parser.ppPins[1];
hr = IMediaSample_GetTime(pSample, &tStart, &tStop);
if (SUCCEEDED(hr))
{
cbSrcStream = IMediaSample_GetActualDataLength(pSample);
hr = IMediaSample_GetPointer(pSample, &pbSrcStream);
}
/* trace removed for performance reasons */
/* TRACE("(%p), %llu -> %llu\n", pSample, tStart, tStop); */
/* Now, try to find a new header */
while (cbSrcStream > 0)
{
if (!This->pCurrentSample)
{
if (FAILED(hr = OutputPin_GetDeliveryBuffer(&pOutputPin->pin, &This->pCurrentSample, NULL, NULL, 0)))
{
FIXME("Failed with hres: %08x!\n", hr);
break;
}
IMediaSample_SetTime(This->pCurrentSample, NULL, NULL);
if (FAILED(hr = IMediaSample_SetActualDataLength(This->pCurrentSample, 0)))
goto fail;
IMediaSample_SetSyncPoint(This->pCurrentSample, TRUE);
}
hr = FillBuffer(This, &pbSrcStream, &cbSrcStream);
if (SUCCEEDED(hr))
continue;
fail:
FIXME("Failed with hres: %08x!\n", hr);
This->skipbytes += This->remaining_bytes;
This->remaining_bytes = 0;
IMediaSample_Release(This->pCurrentSample);
This->pCurrentSample = NULL;
}
if (BYTES_FROM_MEDIATIME(tStop) >= This->EndOfFile)
{
int i;
TRACE("End of file reached\n");
if (This->pCurrentSample)
{
/* Drop last data, it's likely to be garbage anyway */
IMediaSample_SetActualDataLength(This->pCurrentSample, 0);
IMediaSample_Release(This->pCurrentSample);
This->pCurrentSample = NULL;
}
for (i = 0; i < This->Parser.cStreams; i++)
{
IPin* ppin;
HRESULT hr;
TRACE("Send End Of Stream to output pin %d\n", i);
hr = IPin_ConnectedTo(This->Parser.ppPins[i+1], &ppin);
if (SUCCEEDED(hr))
{
hr = IPin_EndOfStream(ppin);
IPin_Release(ppin);
}
if (FAILED(hr))
WARN("Error sending EndOfStream to pin %d (%x)\n", i, hr);
}
/* Force the pullpin thread to stop */
hr = S_FALSE;
}
return hr;
}
static HRESULT MPEGSplitter_query_accept(LPVOID iface, const AM_MEDIA_TYPE *pmt)
{
if (!IsEqualIID(&pmt->majortype, &MEDIATYPE_Stream))
return S_FALSE;
if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1Audio))
return S_OK;
if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1Video))
FIXME("MPEG-1 video streams not yet supported.\n");
else if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1System))
FIXME("MPEG-1 system streams not yet supported.\n");
else if (IsEqualIID(&pmt->subtype, &MEDIASUBTYPE_MPEG1VideoCD))
FIXME("MPEG-1 VideoCD streams not yet supported.\n");
return S_FALSE;
}
static HRESULT MPEGSplitter_init_audio(MPEGSplitterImpl *This, const BYTE *header, PIN_INFO *ppiOutput, AM_MEDIA_TYPE *pamt)
{
WAVEFORMATEX *format;
int bitrate_index;
int freq_index;
int mode_ext;
int emphasis;
int lsf = 1;
int mpeg1;
int layer;
int mode;
ZeroMemory(pamt, sizeof(*pamt));
ppiOutput->dir = PINDIR_OUTPUT;
ppiOutput->pFilter = (IBaseFilter*)This;
wsprintfW(ppiOutput->achName, wszAudioStream);
pamt->formattype = FORMAT_WaveFormatEx;
pamt->majortype = MEDIATYPE_Audio;
pamt->subtype = MEDIASUBTYPE_MPEG1AudioPayload;
pamt->lSampleSize = 0;
pamt->bFixedSizeSamples = FALSE;
pamt->bTemporalCompression = 0;
mpeg1 = (header[1]>>4)&0x1;
if (mpeg1)
lsf = ((header[1]>>3)&0x1)^1;
layer = 4-((header[1]>>1)&0x3);
bitrate_index = ((header[2]>>4)&0xf);
freq_index = ((header[2]>>2)&0x3) + (mpeg1?(lsf*3):6);
mode = ((header[3]>>6)&0x3);
mode_ext = ((header[3]>>4)&0x3);
emphasis = ((header[3]>>0)&0x3);
if (!bitrate_index)
{
/* Set to highest bitrate so samples will fit in for sure */
FIXME("Variable-bitrate audio not fully supported.\n");
bitrate_index = 15;
}
pamt->cbFormat = ((layer==3)? sizeof(MPEGLAYER3WAVEFORMAT) :
sizeof(MPEG1WAVEFORMAT));
pamt->pbFormat = CoTaskMemAlloc(pamt->cbFormat);
if (!pamt->pbFormat)
return E_OUTOFMEMORY;
ZeroMemory(pamt->pbFormat, pamt->cbFormat);
format = (WAVEFORMATEX*)pamt->pbFormat;
format->wFormatTag = ((layer == 3) ? WAVE_FORMAT_MPEGLAYER3 :
WAVE_FORMAT_MPEG);
format->nChannels = ((mode == 3) ? 1 : 2);
format->nSamplesPerSec = freqs[freq_index];
format->nAvgBytesPerSec = tabsel_123[lsf][layer-1][bitrate_index] * 1000 / 8;
if (layer == 3)
format->nBlockAlign = format->nAvgBytesPerSec * 8 * 144 /
(format->nSamplesPerSec<<lsf) + 1;
else if (layer == 2)
format->nBlockAlign = format->nAvgBytesPerSec * 8 * 144 /
format->nSamplesPerSec + 1;
else
format->nBlockAlign = 4 * (format->nAvgBytesPerSec * 8 * 12 / format->nSamplesPerSec + 1);
format->wBitsPerSample = 0;
if (layer == 3)
{
MPEGLAYER3WAVEFORMAT *mp3format = (MPEGLAYER3WAVEFORMAT*)format;
format->cbSize = MPEGLAYER3_WFX_EXTRA_BYTES;
mp3format->wID = MPEGLAYER3_ID_MPEG;
mp3format->fdwFlags = MPEGLAYER3_FLAG_PADDING_ON;
mp3format->nBlockSize = format->nBlockAlign;
mp3format->nFramesPerBlock = 1;
/* Beware the evil magic numbers. This struct is apparently horribly
* under-documented, and the only references I could find had it being
* set to this with no real explanation. It works fine though, so I'm
* not complaining (yet).
*/
mp3format->nCodecDelay = 1393;
}
else
{
MPEG1WAVEFORMAT *mpgformat = (MPEG1WAVEFORMAT*)format;
format->cbSize = 22;
mpgformat->fwHeadLayer = ((layer == 1) ? ACM_MPEG_LAYER1 :
((layer == 2) ? ACM_MPEG_LAYER2 :
ACM_MPEG_LAYER3));
mpgformat->dwHeadBitrate = format->nAvgBytesPerSec * 8;
mpgformat->fwHeadMode = ((mode == 3) ? ACM_MPEG_SINGLECHANNEL :
((mode == 2) ? ACM_MPEG_DUALCHANNEL :
((mode == 1) ? ACM_MPEG_JOINTSTEREO :
ACM_MPEG_STEREO)));
mpgformat->fwHeadModeExt = ((mode == 1) ? 0x0F : (1<<mode_ext));
mpgformat->wHeadEmphasis = emphasis + 1;
mpgformat->fwHeadFlags = ACM_MPEG_ID_MPEG1;
}
pamt->subtype.Data1 = format->wFormatTag;
TRACE("MPEG audio stream detected:\n"
"\tLayer %d (%#x)\n"
"\tFrequency: %d\n"
"\tChannels: %d (%d)\n"
"\tBytesPerSec: %d\n",
layer, format->wFormatTag, format->nSamplesPerSec,
format->nChannels, mode, format->nAvgBytesPerSec);
dump_AM_MEDIA_TYPE(pamt);
return S_OK;
}
static HRESULT MPEGSplitter_pre_connect(IPin *iface, IPin *pConnectPin)
{
PullPin *pPin = (PullPin *)iface;
MPEGSplitterImpl *This = (MPEGSplitterImpl*)pPin->pin.pinInfo.pFilter;
ALLOCATOR_PROPERTIES props;
HRESULT hr;
LONGLONG pos = 0; /* in bytes */
BYTE header[10];
int streamtype = 0;
LONGLONG total, avail;
AM_MEDIA_TYPE amt;
PIN_INFO piOutput;
IAsyncReader_Length(pPin->pReader, &total, &avail);
This->EndOfFile = total;
hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
if (SUCCEEDED(hr))
pos += 4;
/* Skip ID3 v2 tag, if any */
if (SUCCEEDED(hr) && !strncmp("ID3", (char*)header, 3))
do {
UINT length;
hr = IAsyncReader_SyncRead(pPin->pReader, pos, 6, header + 4);
if (FAILED(hr))
break;
pos += 6;
TRACE("Found ID3 v2.%d.%d\n", header[3], header[4]);
length = (header[6] & 0x7F) << 21;
length += (header[7] & 0x7F) << 14;
length += (header[8] & 0x7F) << 7;
length += (header[9] & 0x7F);
TRACE("Length: %u\n", length);
pos += length;
/* Read the real header for the mpeg splitter */
hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
if (SUCCEEDED(hr))
pos += 4;
TRACE("%x:%x:%x:%x\n", header[0], header[1], header[2], header[3]);
} while (0);
while(SUCCEEDED(hr) && !(streamtype=MPEGSplitter_head_check(header)))
{
TRACE("%x:%x:%x:%x\n", header[0], header[1], header[2], header[3]);
/* No valid header yet; shift by a byte and check again */
memmove(header, header+1, 3);
hr = IAsyncReader_SyncRead(pPin->pReader, pos++, 1, header + 3);
}
if (FAILED(hr))
return hr;
pos -= 4;
This->skipbytes = pos;
switch(streamtype)
{
case MPEG_AUDIO_HEADER:
{
LONGLONG duration = 0;
DWORD ticks = GetTickCount();
hr = MPEGSplitter_init_audio(This, header, &piOutput, &amt);
if (SUCCEEDED(hr))
{
WAVEFORMATEX *format = (WAVEFORMATEX*)amt.pbFormat;
props.cbAlign = 1;
props.cbPrefix = 0;
/* Make the output buffer a multiple of the frame size */
props.cbBuffer = 0x4000 / format->nBlockAlign *
format->nBlockAlign;
props.cBuffers = 1;
hr = Parser_AddPin(&(This->Parser), &piOutput, &props, &amt);
}
if (FAILED(hr))
{
if (amt.pbFormat)
CoTaskMemFree(amt.pbFormat);
ERR("Could not create pin for MPEG audio stream (%x)\n", hr);
break;
}
/* Check for idv1 tag, and remove it from stream if found */
hr = IAsyncReader_SyncRead(pPin->pReader, This->EndOfFile-128, 3, header+4);
if (FAILED(hr))
break;
if (!strncmp((char*)header+4, "TAG", 3))
This->EndOfFile -= 128;
/* http://mpgedit.org/mpgedit/mpeg_format/mpeghdr.htm has a whole readup on audio headers */
while (pos < This->EndOfFile && SUCCEEDED(hr))
{
LONGLONG length = 0;
while (parse_header(header, &length, &duration))
{
/* No valid header yet; shift by a byte and check again */
memmove(header, header+1, 3);
hr = IAsyncReader_SyncRead(pPin->pReader, pos++, 1, header + 3);
if (FAILED(hr))
break;
}
if (SUCCEEDED(hr))
{
pos += length;
hr = IAsyncReader_SyncRead(pPin->pReader, pos, 4, header);
}
}
hr = S_OK;
TRACE("Duration: %d seconds\n", (DWORD)(duration / 10000000));
TRACE("Parsing took %u ms\n", GetTickCount() - ticks);
break;
}
case MPEG_VIDEO_HEADER:
FIXME("MPEG video processing not yet supported!\n");
hr = E_FAIL;
break;
case MPEG_SYSTEM_HEADER:
FIXME("MPEG system streams not yet supported!\n");
hr = E_FAIL;
break;
default:
break;
}
This->remaining_bytes = 0;
This->position = 0;
return hr;
}
static HRESULT MPEGSplitter_cleanup(LPVOID iface)
{
MPEGSplitterImpl *This = (MPEGSplitterImpl*)iface;
TRACE("(%p)->()\n", This);
if (This->pCurrentSample)
IMediaSample_Release(This->pCurrentSample);
This->pCurrentSample = NULL;
return S_OK;
}
HRESULT MPEGSplitter_create(IUnknown * pUnkOuter, LPVOID * ppv)
{
MPEGSplitterImpl *This;
HRESULT hr = E_FAIL;
TRACE("(%p, %p)\n", pUnkOuter, ppv);
*ppv = NULL;
if (pUnkOuter)
return CLASS_E_NOAGGREGATION;
This = CoTaskMemAlloc(sizeof(MPEGSplitterImpl));
if (!This)
return E_OUTOFMEMORY;
ZeroMemory(This, sizeof(MPEGSplitterImpl));
hr = Parser_Create(&(This->Parser), &CLSID_MPEG1Splitter, MPEGSplitter_process_sample, MPEGSplitter_query_accept, MPEGSplitter_pre_connect, MPEGSplitter_cleanup);
if (FAILED(hr))
{
CoTaskMemFree(This);
return hr;
}
/* Note: This memory is managed by the parser filter once created */
*ppv = (LPVOID)This;
return hr;
}
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